Electrical Machines and Equipments - · PDF fileElectrical Machines and Equipments . ... 2 ISL 102 Islamic Culture-II 2 2 2 3 ELT 102 Electrical circuits-1I ELT 101 2 2 1 3 4 ELT 103

Department of Electrical Technology Electrical Machines & Equipments

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Department of Electrical Technology

CURRICULUM

FOR

Electrical Machines and Equipments


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Table of Contents

Page Number Subject Serial 5 Electrical circuits-I 1

10 Electromechanical W/S 2 13 Electrical circuits-1I 3 17 Electrical Instruments & Measurements 4 22 Electrical Drawing 5 26 DC Machines &Transformers 6 31 Single phase machine repair and rewinding &Electrical Protection W/S 7 35 Industrial Safety 8 38 AC Machines 9 43 Programmable Control Technology 10 48 Power Electronics 11 54 Three Phase Induction Motor Rewinding & Maintenance W/S 12 58 Electronic Control of Machines 13 62 Automatic Control Technology 14 66 Small Electrical Machines 15 69 Electric Drive 16 72 Generating Plants & Protection Systems 17 78 Control of Electrical Motors W/S 19


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The Study Plan Distributed on Semesters

No. of Units No.

Course Code

Course Name Prerequisites CRH L P T CTH

1 ENG 101 General English Language 3 3 1 4

2 PHY 105 Physics 2 2 2

3 ISL 101 Islamic Culture-I 2 2 2

4 MAT 181 Mathematics 3 3 1 4

5 COM 101 Computer Applications 2 4 4

6 ELT 101 Electrical circuits-I 2 2 1 3

7 ELT 141 Electromechanical W/S 3 6 6

Fir

st S

emes

ter

Total Number of Units 17 12 10 3 25

No. of Units No.

Course Code


1 ENG 142 Specialized English

Language-1 ENG 101 3 3 1 4

2 ISL 102 Islamic Culture-II 2 2 2

3 ELT 102 Electrical circuits-1I ELT 101 2 2 1 3

4 ELT 103 Electrical Instruments &

Measurements ELT 101 2 4 4

5 ELT 104 Electrical Drawing 1 2 2

6 ELT 111 DC Machines

&Transformers ELT 101 3 2 2 1 5

7 ELT 183

Single phase machine repair and rewinding

&Electrical Protection W/S

ELT 141 3 6 6

Sec

ond

Sem

este

r



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No. of Units

No. Course Code


1 ENG 243 Specialized English

Language-II ENG 142 3 3 1 4

2 ARB 101 Arabic Language 2 2 2

3 ELT 105 Industrial Safety 1 1 1

4 ELT 211 AC Machines ELT 142 3 2 2 1 5

5 ELT 201 Programmable Control

Technology ELT 102 2 1 2 1 3

6 ELT 203 Power Electronics ELT 102 3 2 2 4

7 ELT 281 Three Phase Induction

Motor Rewinding & Maintenance W/S

ELT 183 2 4 4

Th

ird

Sem

este

r


No. of Units No.

Course Code


1 ELT 212 Electronic Control of

Machines ELT 203 3 2 2 4

2 ELT 204 Automatic Control

Technology ELT 102 2 1 2 3

3 ELT 213 Small Electrical Machines ELT 211 2 2 2

4 ELT 214 Electric Drive ELT 211 2 2 2

5 ELT 247 Generating Plants & Protection Systems

ELT 211 2 1 2 1 4

6 MGT 101 Professional Ethics & Communication Skills

2 2 2

7 ELT 283 Control of Electrical

Motors W/S ELT 211 3 6 6

For

th S

emes

ter


No. of Units No.

Course Code


Su

mm

er

1 ELT 299 Co-operative Training 4 At least 420 Hrs.

Semester Number CRH L P T CTH

Total Number of Credit Unit 69 42 46 9 97

CRH: Credit Hours L: Lecture P: Practical T: Tutorial CTH: Contact Hours


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Department Electrical Technology Specialization Electrical Machines & Equipments

Course Name Electric Circuits-I Course Code ELT 101

Prerequisites none

Semester 1 2 3 4

Credit Hours 2

L 2

P

Course Description: This course describes six main topics:

Fundamentals of electrostatics. Batteries. Principles of DC circuits DC circuits analysis. Electromagnetism. Magnetic circuits.

The course contains explanation of electrostatics laws, batteries, DC circuit analysis, electromagnetism and magnetic circuits The course contents include: capacitors, Ohm's law, Kirchoff's laws, series& parallel circuits, power, and DC bridges.

Contact Hours (h/w)

T 1

General objective of the course: The course is designed to give the trainee basic knowledge of electrostatic, batteries,

fundamentals of DC current, and analyses of DC circuits, electromagnetism, and magnetic circuits.

Behavioral Objectives: Prepare the trainee to be able to:

1. Explain the terms used in basic electrostatics. 2. Describe the types of capacitors and how to determine the total capacitance for

different capacitor connections. 3. Describe the types of batteries and its construction and connections. 4. Explain the different resistor connections and calculate the total resistance. 5. Explain and apply Ohm's law. 6. Represent Ohm's law graphically. 7. Apply Kickoff’s laws, and voltage and current division rules 8. Solve simple DC circuit. 9. Explain the principles of electromagnetism. 10. Solve simple magnetic circuits.

Contents (Theoretical):

Basic Electrostatic. Batteries. Principles of DC circuits

DC circuits analysis. Electromagnetism. Magnetic circuits.


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Detailed Theoretical Contents

Hours Contents Related Tasks

6

1-Electrostatic Electric charge Electric charge. Coulomb's law. Force between two charges. Electric field Electric potential. Potential difference.

Capacitors Capacitance of an isolated ball. Capacitance of an earthed ball capacitor. Capacitance of a parallel plate capacitor. Series and parallel connections of capacitors. Energy stored in capacitors.

Basic Knowledge

3

2-Batteries Primary cells. Secondary cells. Definitions of the capacity of the battery and the charging

current. Charging and discharging curves. Connection of cells in series and parallel.

Basic Knowledge A4, B3, B4, B6, B7, B8, B9, C2, C3, C6, C7, D5,

D9, E3, E4, E5, F3, F5, H2, H11, J5


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Detailed Theoretical Contents Hours Contents Related Tasks

9

3-DC circuits Electrical Quantities Quantity of charge. Current and current intensity. DC voltage and current Resistance and resistors. Ohm's law

Differentiation between conductors and semi-conductors and insulators with respect to properties and atomic construction. Metallic conductors. Electrolytic conductors. Semi conductors. Insulators.

Factors affecting conductor resistance. Conductor length, cross-sectional area, and type of material. Effect of temperature on resistance. Positive and negative temperature coefficient of resistance. Calculation of homogenous conductor resistance.

Methods of connecting resistances. Series connection of resistors. Parallel connection of resistors. Series-parallel connection of resistors. Calculation of resistances connected in series-parallel

connections. Kirchoff's laws: Kirchoff's current laws. Kirchoff's voltage laws.

Simple circuit calculations. Series connection. Voltage divider rule. Parallel connection. Current divider rule. Series parallel connectionز Star or delta connection. Star or delta transformations. Power dissipated in resistors.

Basic Knowledge

A4,A8, B3, B4, B6, B7, B8, B9, C2, C3, C6, C7, D5,

D9, E3, E4, E5,F1,F2, F3, F5,

H2, H11, J5


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6

4-DC circuit analysis: Methods of DC circuit analysis. Kirchoff's current and voltage laws. Mesh current method. Node voltage method. Superposition method.

Note: not more than two equations.

Basic Knowledge A4,A8, B3, B4, B6,

B7, B8, B9, C2, C3, C6, C7, D5,

D9, E3, E4, E5,F1,F2, F3, F5,

H2, H11, J5

8

5- Electromagnetism: Natural and magnetic fields. Magnetic field due to current carrying conductor and the

right hand rule. Magnetic field due to a coil. Magnetic field density, magnetic field intensity, and

permeability. Mechanical force acting on a conductor carrying DC current

in a magnetic field, and factors affecting this force. Direction of force acting on a conductor carrying DC current Elector-magnetic force generated in a conductor moving

vertically to a magnetic field. Direction of EMF generated in a conductor moving vertically

to a magnetic field. Self and mutual induction. Lenz's law

Basic Knowledge

7

6- Magnetic Circuits: Magnetic reluctance and the factors affecting it. The electro-magnetic force. Ohm's law for the magnetic circuit. Comparison between electric and magnetic circuits. Classification of the magnetic materials according to its

magnetic properties. Magnetization curve for some magnetic materials. Kirchoff's laws for magnetic circuits. Application on simple magnetic circuits.

Basic Knowledge


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References

Electrical Technology, Edward Hughes Introductory Circuit Analysis, Robert L. Boylestad, 2000 Principles of Electric circuits, Thomas L. Floyd, 1999 Fundamentals of Electric Circuits, Charles K. Alexander, N.

O. Sadiaka, 2000 Electric Circuits, Joseph Edminister, Mahmood Nahoi, 1997


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Course Name Electro-mechanical W/S Course Code ELT 141

Prerequisites None

Semester 1 2 3 4

Credit Hours 3

L

P 6

Course Description: This practical course prepares the trainee to use mechanical

tools specially that used in electrical works. It also, trains the trainees on the fundamentals of electrical installations, and the regulations and symbols used in electrical installations. In addition, this course trains the trainees to implement electrical installations to domestic and industrial buildings, and diagnoses and fixes the faults.

Contact Hours (h/w)

T

General objective of the course: The course aims to enable the trainees to use the mechanical tools in a professional way, knows

the electrical regulation of domestic and industrial installations. It also trains the trainees to install and put into operation simple domestic and industrial installations


1. Perform some mechanical and electrical jobs. 2. Read and draw simple electrical layouts and its symbols. 3. Knows the electrical regulation of domestic and industrial installations. 4. Install, put into operation, test and carry out trouble shooting in domestic

installations. 5. Find out the faults in simple electrical installations and clear these faults.

Contents (Practical):

Basic mechanical tools and mechanical skills. Mechanical and electrical work to build and assemble a small transformer. Fundamentals of electrical installation. Electrical installations for domestic and industrial buildings.


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Detailed Practical Contents


12

1- Basic mechanical tools and mechanical skills: Using mechanical hand tools. Using electrical hand machines (The electric drill, electric

saw ....) Measuring, laying out, punching, drilling, sawing, filing,

cutting thread, preparing fitting. Carrying out simple mechanical job

Basic knowledge

A2, A3, A6, A8, B8

30

2- Mechanical and electrical work to build and assemble a small transformer:

Preparing of lamination Measuring and laying out material with well chosen tools. Selecting suitable file. Choosing the proper tapping drill sizes. Producing countersinks for screw heads with a help of bench

drills

Preparing coil forms Measuring and laying out material with well chosen tools. Fixing and filing the work piece. Machining and drilling the coil form in a proper way.

Assembling the coil forms. Selecting the proper wire size. Determining the number of turns Winding the primary and secondary coils and isolate them. Checking the coil for short circuit between layers

Manufacturing the transformer case Measuring and laying out material with well chosen tools. Fixing and filing the case.

Assembling the transformer. Fastening the transformer and coils inside the case. Installing ON/OFF switch, indicator lamp, voltmeter, and

connecting terminals. Testing the transformer.

Basic knowledge

A2, A3, A6, A8, D3, D4, I3

H7, H8, H9, I5, I7


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Detailed Practical Contents Hours Contents Related Tasks

12

3- Fundamentals of electrical installation: Components of electrical installations and its symbols. Wire's types and colors. Wires trimming, soldering, connecting by screw. Power calculations and balanced distribution on the three

phases Cables and conductor size selections.

Basic knowledge

A8, F1, F3, F4, I5, I7, I10

30

4- Electrical installations for domestic and industrial buildings: Drawing the circuit diagram with symbols. Determining the place of the distribution panel. Fixing the distribution panel. Load power calculations and proper cable selection. Determining conduit size (cross section) Determining conduit paths Fixing the conduits. Pulling the cable inside the conduit Circuit breaker rating and selection Circuit breaker installation Making sure that the earth is connected Energizing the circuit and testing the circuit operation

Basic knowledge

I4, I5, I7, I10, I11

References Top 2 and 4: Electric Power Engineering Proficiency Course,

Deutsche Gesellschaft Fur Technische Zusammenarbeit (GTZ)


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Course Name Electric Circuits-II Course Code ELT 102

Prerequisites Electric Circuits-I

Semester 1 2 3 4

Credit Hours 2 L 2

P

Course Description: This course describes two main topics: Single phase circuits Three phase circuits. The course explains the fundamentals of AC circuits, and

enables the trainee to analyze single and three phase circuits.

Contact Hours (h/w) T 1

General objective of the course: The aim of the course is to enable the trainee to understand, analyze single and three phase AC

circuits. Behavioral Objectives: Prepare the trainee to be able to:

11. Understand the fundamentals alternating current. 12. Explain the characteristics of ac current. 13. Understand the definitions of alternating current. 14. Understand the different connections of impedances. 15. Know the phase angle between voltage and current in resistive, inductive, and

capacitive impedances. 16. Calculate the impedance. 17. Define the terms resistance, inductive reactance, capacitive reactance, and

impedance. 18. Know the phase angle between voltage and current in resistive, inductive, and

capacitive impedances. 19. Calculate the impedance. 20. Understand the meaning of power factor 21. Differentiate between series and parallel connections in ac circuits. 22. Apply voltage and current divider rules. 23. Discriminate between resistive, capacitive, and inductive loads. 24. Understand resonance in AC circuits. 25. Understand the difference between apparent, active, and reactive power. 26. Describe three phase systems. 27. Explain what is meant by phase sequence. 28. Differentiate between Star and Delta connections. 29. Recognize the relations between line and phase quantities. 30. Use two-wattmeters to measure three phase power.


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Fundamentals of AC circuits and its analysis. Three phase circuits and its analysis.


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1. Fundamentals of AC circuits and its analysis Alternating current

Definition of AC current. Generation of AC voltage. Sinusoidal alternating current. Waveform, frequency, and periodic time. Instantaneous value. RMS value of AC voltage and current. Average value of AC voltage and current. Peak and form Factors. Phasor representation of sinusoidal waveforms. Phasor algebra. Addition and subtraction of phasor quantities. Multiplication and division of phasor quantities.

Resistance, inductive, and capacitive reactance’s Resistance in AC circuits. Inductive reactance in AC circuits. Capacitive reactance in AC circuits. Phasor diagram of restive, inductive and capacitive

loads. Ohm's law in AC circuits. Series connection. Voltage divider rule. Resonance in series connected circuits. Parallel connection. Current divider rule. Resonance in parallel connected circuits. Series/Parallel connections. Application of Kirchoff's laws to simple circuits.

Work and power in single phase AC circuits. Apparent power. Active power. Reactive power. Power triangle. Power factor. Power measurement in single phase circuits.


D9, E3, E4, E5, F3, F5, H2, H11, J5


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2. Three phase AC circuits and its analysis

Description of three phase system. Generation of three phase voltages. Phase sequence. Representation of three phase quantities. Star and Delta connections. Relation between line and phase quantities in case of

Star and Delta connections. Conversion from Star to Delta connections and vice

versa. Power in balanced three phase circuits. Two watt-meters method of measuring power.


D9, E3, E4, E5, F3, F5, H2, H11, J5

References

Electric Circuits, Joseph Edminister, Mahmood Nahoi, 1997 Electrical Technology, Edward Hughas Introductory Circuit Analysis, Robert L. Boylestad, 2000 Principles of Electric circuits, Thomas L. Floyd, 1999 Fundamentals of Electric Circuits, Charles K. Alexander, N.

O. Sadiaka, 2000 Electric Circuits, Joseph Edminister, Mahmood Nahoi, 1997

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Course Name Electrical Instruments & measurements Course Code ELT 103


Semester 1 2 3 4

Credit Hours 2

L P 4

Course Description: This practical course introduces the bases of the electrical

measuring devices. It gives the trainee the basic knowledge needed to use electrical measuring instruments. This is done by teaching the theoretical part and executing the necessary experiments in the laboratory.

Contact Hours (h/w) T

General objective of the course: The course aims to train the trainees the bases of electrical measurements and the measuring

instruments. It also enables the trainee to use the different measuring instruments efficiently. Behavioral Objectives: Prepare the trainee to be able to:

1. Identify the construction of the different measuring instruments. 2. Use the different measuring instruments. 3. Read correctly the different measuring instruments. 4. Identify the construction and the connections of the watt-meters and KWH

meters 5. Measure the power using two watt-meter method in three phase circuits. 6. Identify the construction of the oscilloscope 7. Use the oscilloscope as a measuring device 8. Identify the construction of the digital meters. 9. Measure the electrical quantities using digital meters. 10. Use Wheatstone and Maxwell bridges in measurements. 11. Identify the construction of potential and current transformers (P.T. & C.T.). 12. Use the P.T. and C.T. in measurements. 13. Write report about the work done.


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Measurements using moving coil instrument Measurements using moving iron instrument. Measurements using digital meters. Measurements using oscilloscope. Measurements using Wheatstone and Maxwell bridges. Electrical power measurements. Measurements using P.T and C.T. Electrical energy measurements.


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18

1- Measurements Using Moving Coil Instruments: Construction Using the moving coil instruments to measure the DC and

AC quantities Measuring the current Internal resistance Increasing the range for current measurement. Measuring the voltage Increasing the range for voltage measurements. Measuring the resistance using moving coil instrument.

Basic knowledge B2, B6 ,F9, C6

6

2- Measurements using moving iron instrument: Construction Using the moving iron instruments to measure the DC and

AC quantities. Measuring the current. Measuring the voltage.


4

3- Measurements using digital meters: Measuring the voltage using digital meters. Measuring the current using digital meters. Measuring the resistance using digital meters. Calibration of instruments.


4

4- Measurements using oscilloscope: DC voltage measurement. Using oscilloscope to study AC current characteristics. ¯ Measuring the peak and calculation of RMS value. ¯ Measuring the frequency and periodic time.

DC and AC currents measurements. Measuring the phase shift.



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4

5- Measurements using Wheatstone and Maxwell bridges: Wheatstone bridge. Measuring the resistance using Wheatstone bridge. Maxwell bridge. Measuring the impedance using Maxwell bridge.


8

6- Electrical power measurements: Wattmeter. Power measurements in DC circuits ¯ Measuring the power using the voltage and the current. ¯ Measuring the power using wattmeter

Measuring the power in single phase circuits ¯ Comparing the active power measured by wattmeter with

that measured using voltmeter and ammeter. ¯ Power factor measurements for resistive, inductive and

capacitive loads. Measuring the power in three phase circuits ¯ Measuring the power for resistive, inductive and capacitive

loads using three watt meters. ¯ Measuring the power for resistive, inductive and capacitive

loads using two watt meters ¯ Reactive Power measurements.


4

7- Measurements using P.Ts and C.Ts Measuring the current using C.T. Measuring the voltage using P.T. Power measurements using C.T. and P.T.


8

8- Measurements using P.Ts and C.Ts KWH meters. ¯ Measuring the electrical energy using three phase KWH

meter. ¯ Measuring the electrical energy using three phase KWH

meter and C.Ts. ¯ Measuring the electrical energy using three phase KWH

meter and C.Ts. and P.Ts.



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References

Electrical Technology, Edwards Hughas

Introductory Circuit Analysis, Robert L. Boylestetad, 2000

Principles of Electric Circuits, Thomas L. Floyd, 1999

Fundamentals of Electric Circuits, Charles K. Alexander, N.

O.Sadika, 2000

Electric Circuits, Joseph Edminister, Mahmood Nhoi, 1997


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Course Name Technical Electrical Drawing Course Code ELT 104

Prerequisites None

Semester 1 2 3 4

Credit Hours 1

L

P 2

Course Description: The course describes the electrical and electronic symbols,

and the wiring diagrams for residential and industrial installations.

The course also includes the connection diagrams of control and protection circuits.

Computers programs may be used to draw such circuits and diagrams.

Contact Hours (h/w)

T

General objective of the course: The course aims to introduce the trainees to the basics of technical electrical drawing to enable

him reading layouts of electrical installations, and control and protection circuit diagrams. Behavioral Objectives: Prepare the trainee to be able to:

1. Know the electrical and electronic symbols. 2. Know the classifications of electrical circuits and layouts 3. Read electrical circuits and installations layouts 4. Read and draw control and protection circuits 5. Draw single line and execution diagrams for domestic installations. 6. Draw single line and execution diagrams of industrial installations. 7. Draw the equivalent circuits for the different types of dc machines. 8. Draw the equivalent circuits for the different types of three phase synchronous

and asynchronous machines. 9. Draw the circuit diagram for the different methods of starting of dc and ac

machines. 10. Draw the circuit diagram for the different methods of speed control of dc and ac

machines. 11. Draw single line diagrams for electrical networks. 12. Draw the wiring diagrams for the protection circuits for the elements of an

electrical network.


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Elements and Symbols of Electrical Circuits. Single Line and Execution Diagrams for Domestic Installations. Single Line and Execution Diagrams for Industrial Installations and its

distribution networks. Connection Diagrams for Electrical Machines and Equipments. Connection Diagrams for the Methods of Starting and Speed Control of

Electrical Motors. Layouts of Power System Networks and its Protection Schemes.


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8

1- Elements and symbols of electrical circuits: Symbols of the basic elements.

Voltage and current sources, resistors, inductors, capacitors, switches, and measuring instruments. Symbols of power electronic elements:

Diodes, transistors, diac, thyistors, triac MOSFET,.etc. Symbols of control and protection circuit elements

Contactors, relays, circuit breakers, timers, etc. Electrical machines symbols:

DC & AC machines and transformers.

Basic knowledge I2, E2, C2, E1, H1, I2

4

2-Single line and execution diagrams for domestic installations: Schematic diagram for domestic circuits Lightening and equipment installation diagrams. Domestic distribution boards.


4

3- Single line and execution diagrams for industrial installations and its distribution networks: Layouts of industrial feeding networks. Industrial distribution boards.


4

4- Connection diagrams for electrical machines and equipments: DC machines

1. Separately excited DC machine 2. Series DC machine 3. Shunt DC machine 4. Compound DC machine

AC machines o Single phase synchronous generators. o Three phase synchronous generators o Single phase induction motor o Three phase induction motor



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4

5- Connection diagrams for the methods of starting and speed control of electrical motors: Starting and speed control circuits of dc motors. Starting and speed control circuits of three-phase induction

motors.


4

6- Layouts of power system networks and its protection schemes. Single line diagram for electrical networks. Substations Electrical networks Motor protection circuits Transformers protection circuits. Generators protection circuits. Transmission lines protection circuits.


References

Technical drawing, Park German Training Program. Engineering Drawing, By Prof. Michel Ghalioungui and Dr. M.

A. H. El-Rakabawy Graphical Symbols for Electrical Power and Electronics, IC7 Experimentier Bausteinsysteem, By Siemens

اقةتكنولوجيا الط الجزء الثالث، – الجزء الثاني –الرسم الفني للكهرباء


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Course Name DC Machines &Transformers Course Code ELT 111


Semester 1 2 3 4

Credit Hours 3

L 2

P 2

Course Description: This course describes two main topics:

Direct current machines. Transformers.

This course covers construction, principles of operation, classification, equivalent circuits, parameters evaluation, characteristics, testing and applications of DC machines and single and three phase transformers.

Contact Hours (h/w)

T 1

General objective of the course: The course aims to give trainees basic knowledge of construction, theory, performance analysis,

and applications of DC machines and transformers. The course contains practical part in which the trainees learn how to measure the machine parameters and performance over the working range. Behavioral Objectives: Prepare the trainee to be able to:

1. Describe the components and construction of DC machines and transformers. 2. Describe the types and characteristics of DC machines and transformers. 3. Explain the methods of controlling the generated voltage of DC generators. 4. Describe the methods of starting, speed control, and reversing the direction of

rotation of DC motors. 5. Describe the equivalent circuit parameters of transformers. 6. Distinguish three phase transformer connections. 7. Name the conditions of parallel operation of transformers.

Contents (Theoretical and Practical):

Magnetic circuits. DC generators. DC motors. Single phase transformers. Three phase transformers. Laboratory experiments.


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3

1-Magnetic circuits Review of magnetic circuits: Concept of magnetic circuits,

reluctance, mmf, and flux. Analogy between electric and magnetic circuits. Representation of simple magnetic circuits.

Basic knowledge

9

2-DC Generators Construction and theory of operation of dc generators. EMF equation. Methods of excitation: Separately excited, series, shunt, and

compound. Characteristic curves and voltage regulation. Voltage buildup and critical field resistance. Losses and efficiency. Applications.

B1, C1, C2, C3, C6, D5, D8, D9,

E1, E3, E4, E7, E8, E9, J1, J2, J4, J5,

J6

9

3-DC Motors Theory of operation of dc motors. Back EMF, and torque equation. Torque / speed curves according to the method of excitation. Speed regulation. Methods of speed control. Methods of starting. Losses and efficiency. Applications.

B1, C1, C2, C3, C6, D5, D8, D9,

E1, E3, E4, E7, E8, E9, J1, J2, J4, J5,

J6


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15

4-Single phase transformers Constructional features, types, and theory of operation of

transformers. The ideal transformer. EMF equation and transformation ratio. Equivalent circuit. The equivalent circuit referred to either the primary or

secondary winding. Phasor diagram at no-load and at full load. No-load and short-circuit tests. Load test. Determination of transformer parameters. Losses and efficiency. Conditions of parallel operation of single phase transformers. Auto-transformers. Voltage regulators.

Transformer cooling Types of transformer cooling. Advantages of each type of transformer cooling. Effect of cooling on power output and efficiency.

B1, C1, C2, C3, C6, D5, D8, D9,

E1, E3, E4, E7, E8, E9, J1, J2, J4, J5,

J6

6

4-Threee phase transformers Three phase transformer connections. Classifications if three phase transformers. Conditions of parallel operation of three phase transformers,

and faults which may occur during connections. Transformation ratio for the different connections of three

phase transformers.

B1, C1, C2, C3, C6, D5, D8, D9,

E1, E3, E4, E7, E8, E9, J1, J2, J4, J5,

J6


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10

1-DC generators experiments: Separately excited generators

o No load characteristics (The relation between generated EMF and field current at different speeds).

o Load characteristics (The relation between terminal voltage and load current).

Shunt generators

o No load characteristics. o Load characteristics.

Compound generators

o Load characteristics for both differentially and cumulatively compound generators.

B1, C1, C2, C3, C6, D5, D8, D9,

E1, E3, E4, E7, E8, E9, J1, J2, J4, J5,

J6

10

2-DC motors experiments: Load characteristics of shunt motors. Load characteristics of series motors. Load characteristics of both differentially and cumulatively

compound motors.

B1, C1, C2, C3, C6, D5, D8, D9,

E1, E3, E4, E7, E8, E9, J1, J2, J4, J5,

J6

8

3-Transformers experiments: No-load and short-circuit tests Load test Parallel connection of single phase transformers.

B1, C1, C2, C3, C6, D5, D8, D9,

E1, E3, E4, E7, E8, E9, J1, J2, J4, J5,

J6


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References

Electrical Technology, Edward Hughes, ISBN: 0-07-02134-5. Electric Machines G. R. Slemon and A. Straughan, Eddison-

Weslley, 1980. Electrical Machines and Transformers-Principles and

applications, P. F. Ryff, D. Platnick, and J. A. Karnas, Printice Hall.

Electric Machinery, M. S. Sarma, West Publishing Company, 1994.


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Course Name Single phase machine repair and rewinding &Electrical

Protection W/S Course Code ELT 183

Prerequisites Electro-mechanical W/S

Semester 1 2 3 4

Credit Hours 3

L

P 6

Course Description: This course concerns with three main topics:

Rewinding of single phase motors. Preventive maintenance of electrical machines. Safety measures and protection

Contact Hours (h/w)

T

General objective of the course: The course aims to enable the trainee to rewind single phase motors, perform preventive

maintenance of electrical machines, select suitable safety measures for possible applications and perform different protection tests


1. Rewind single phase motors. 2. Find out faults in single phase motors and clear it. 3. Identify preventive maintenance procedures for electrical machines. 4. Perform preventive maintenance of electrical machines. 5. Apply protective measures and safety regulations according to standards. 6. Perform different protection tests.


1- Types and construction of single phase motors. 2- Rewinding of single phase motors. 3- Rewinding the rotor of universal motors. 4- Preventive maintenance of electrical machines. 5- Safety measures and protection.


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6

1- Types and construction of single phase motors: Types and construction of single phase motors (stator, rotor,

main & auxiliary windings, number of poles, etc). Name plate data.

Basic Knowledge

30

2- Rewinding of single phase motors: Rewinding dual voltage motors (water pump motor). Types and construction of the motor. Working principle. Read name plate data. Dismantle and clean the motor. Remove the windings. Note the winding data and the circuit. Draw the winding diagram. Identify winding connections for dual voltages (series /

parallel). Prepare the motor for rewinding

1. Clean the slots. 2. Select insulating materials. 3. Perform the needed insulation.

Determine the size and form of the coils. Adjust the rewinding machine and wind the main and

starting coils. Insert the coils in the slots and connect the coil terminals. Bandage the windings. Assemble the motor. Connect and test the motor.

Rewinding two speed motors (desert air cooler motor). Type and construction of the motor. Working principle. Read name plate data.

Basic Knowledge

H1, H2, H3, H4, H5, H6, H7, H8,

H9, H10, H11, H12


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Cont.

Dismantle and clean the motor. Remove the windings. Note the winding data and the circuit. Draw the winding diagram. Identify winding connections for the two speeds. Prepare the motor for rewinding


Determine the size and form of the coils. Adjust the rewinding machine and wind the main and starting

coils. Insert the coils in the slots and connect the coil terminals. Bandage the windings. Assemble the motor. Connect and test the motor.

Basic Knowledge

H1, H2, H3, H4, H5, H6, H7, H8, H9, H10, H11,

H12

18

3-Rewinding the rotor of universal motors( Lap / Wave ): Type and construction of the motor. Working principle. Read name plate data. Dismantle and clean the motor. Remove the windings. Draw the winding diagram. Identify rotor winding connections (lap/wave). Prepare the motor for rewinding


Determine the size and form of the coils. Adjust the rewinding machine and wind the required number of

coils.

H1, H2, H3, H4, H5, H6, H7, H8, H9, H10, H11,

H12


- 34 -


Insert the coils in the slots and weld the coil terminals to the

commutator. File and clean the commutator. Bandage the windings. Assemble the motor. Connect and test the motor.

9

4-Preventive maintenance of electrical machines: Checking the motor shafts against bending or wearing. Checking motor fans and replacing them if necessary. Checking motor bearing and replacing them if necessary. Checking motor carriers and replacing them if necessary. Checking carbon brushes and replacing them if

necessary. Checking seals and gaskets for oil leakage and replacing

them if necessary. Lubricating and oiling electrical machines.

F1, F2, F3, F4, F5, F6, F7, F8

21

5-Safety measures and protection: Tests the safety measures in case of direct and indirect contact. Selection of the suitable safety measures for possible

applications. Protection tests using isolating transformers. Earth leakage protection tests.

B1, B2, B3, B4, B5, B6, B7, B8, B9, B10, B11

References Top 2 and 4: Electric Power Engineering Proficiency Course, Deutsche Gesellschaft Fur Technische Zusammenarbeit (GTZ)


- 35 -


Course Name Industrial safety Course Code ELT 105

Prerequisites

Semester 1 2 3 4

Credit Hours 1 L 1 P

Course Description: The course presents general rules for safety of peoples and equipments. It also describes the effects electricity on human body. It also discusses fire alarm systems.


General objective of the course: The course aims to train the trainees the danger of electricity and its effect on human body. It

also presents the general safety rules to avoid body injuries. In addition, it describes fire alarm system.


14. Describe general regulation for safety of electrical and mechanical equipments. 15. Describe the reasons of electric shocks. 16. Mention the types of electric injuries. 17. Mention the cases of harming the human body by electric current. 18. Describe the components of fire alarm systems. 19. Describe types of body injuries resulting from electrical current. 20. Presents how to rescue a person who suffered an electric shock. 21. Describe fire alarm systems. 22. Names building which should be provided with fire alarm systems. 23. Describe industrial safety guidelines. 24. Apply safety rules and regulations.


General regulation for safety of equipments. Danger of electricity on human body and how to rescue. Injuries resulting from passing electric current through human body. Fire alarm system. Industrial safety guidelines.


- 36 -



1 1- General regulation for safety of equipments:

Basic skills

5

2- Danger of electricity on human body and how to rescue: Reasons of electric shocks. Electric current in human body.

a Electrical resistance of human body. b Intensity of electric current passing through human body c Effect of voltage d Effect of frequency e Effect of passing the electric current in human body f The electric current path way through the human body

Type of electric injuries. a Electric shocks b Electric burns

Rescuing the injured person. a Freeing the injured person. b Artificial breathing c Treatment of burns

A

3

3- Injuries resulting from passing electric current through human body: Cases of harming human body by electric current. a Touching two active lines. b Touching one active line. c Accidentally touching one voltage terminal d Touching and step voltages.

A


- 37 -


4- Fire alarm systems: Components of fire alarm systems. a Control unit. b Fire detectors. c Thermal detectors d Smoke detectors e Fire alarms Building should be provided with fire alarm system. Manually operated units. Installation of fire alarm system

A

5- Industrial safety guidelines: Limiting unsafe behavior. Personal safety equipments a Eyes protection. b Ears protection. c Protecting suits.

A

References

Electrical Safety Engineering, W. Fordham, Butterworth-Heinemann, 1997

אא J Jאא

אאאאא–Kא–אאאא


- 38 -


Course Name Alternating Current Machines Course Code ELT 211

Prerequisites DC Machines &Transformers

Semester 1 2 3 4

Credit Hours 3

L 2

P 2

Course Description: This course describes two main topics:

Three phase induction motors. Synchronous machines.

This course covers construction, principles of operation, classification, equivalent circuits, parameters determination, characteristics, testing and applications of three phase induction motors and synchronous machines.

Contact Hours (h/w) T 1

General objective of the course: The course aims to give trainees basic knowledge of construction, theory, performance analysis,

and applications of three phase induction motors and synchronous machines. The course contains practical part in which the students learn how to measure the machine parameters and performance over the working range.


1. Describe the components and construction of three phase induction motors. 2. Explain how the rotating magnetic field is produced in three phase induction

motors. 3. Describe the types and characteristics of three phase induction motors. 4. Describe the methods of starting of three phase induction motors. 5. Describe the methods of speed control of three phase induction motors. 6. Describe the types and construction of synchronous machines. 7. Explain the working principle of synchronous generators. 8. Explain how the generated voltage and frequency of synchronous generators can

be adjusted 9. Name the conditions of parallel operations of alternators. 10. Describe the methods of synchronizing alternators with infinite system. 11. Explain how synchronous motors used as synchronous condensers in power

systems.


- 39 -


Three phase induction motors. Three phase synchronous generators. Synchronous motors. Laboratory experiments.


- 40 -



21

1-Three phase induction motors

Construction of three phase induction motors. Types of rotors. Production of rotating magnetic field. Synchronous speed, rotor speed, and slip. Theory of operation of poly-phase induction motors. Equivalent circuit. Power flow diagram. Torque speed relations. Losses and efficiency. Performance calculations. Methods of starting. Methods of speed control.

B1, C1, C2, C3, C5, C6, D5, D8,

D9, E1, E3, E4, E7, E8, E9, J1, J2, J4, J5, J6, H6, H7, H8

15

2-Synchronous generators

Constructional of synchronous machines, (cylindrical rotor and salient pole machines).

Theory of operation of synchronous generators. Armature winding and EMF equation. Equivalent circuit and synchronous impedance. Phasor diagram of synchronous generators at different load

conditions. Voltage regulation. Power and power angle. Control of voltage and frequency. Conditions of parallel operation. Synchronization process and parallel operation of alternators.

B1, C1, C2, C3, C6, D5, D8, D9,

E1, E3, E4, E7, E8, E9, G5, G6, G7, J4,

J5, J6

6

3-Synchronous motors

Theory of operation. Methods of starting. Applications of synchronous motors: The synchronous

condenser and power factor correction.

B1, C1, C2, C3, C6, D5, D8, D9,

E1, E3, E4, E7, E8, E9, G5, G6, G7, J4,

J5, J6


- 41 -



18

1-Three phase induction motors: Determination of the equivalent circuit parameters

o No load test. o Locked rotor test (short circuit test).

Load test: Draw the characteristic curves

o Torque / Speed curve. o Efficiency / Load current curve. o Power factor / Load current curve.

Methods of starting

o Direct starting. o Auto-transformer starting. o Star / Delta starting. o Starting using rotor resistance.

Methods of speed control

o Control by varying supply voltage. o Control using 3-phase rotor resistance with the wound

rotor.

B1, C1, C2, C3, C5, C6, D5, D8,

D9, E1, E3, E4, E7, E8, E9, J1, J2, J4, J5, J6, H6, H7, H8

6

2-Synchronous generators: No-load test. Short circuit test. Load test. Synchronization of two alternators or an alternator with

infinite system.

B1, C1, C2, C3, C6, D5, D8, D9,

E1, E3, E4, E7, E8, E9, G5, G6, G7, J4,

J5, J6

4

3-Synchronous motors: Determination of the V-curves. Explain how the control the motor power factor can be

achieved by varying the field current. Describe the operation of the motor as a synchronous

condenser.

B1, C1, C2, C3, C6, D5, D8, D9,

E1, E3, E4, E7, E8, E9, G5, G6, G7, J4,

J5, J6


- 42 -

References

Electrical Technology, Edward Hughes, ISBN: 0-07-02134-5. Electric Machines G. R. Slemon and A. Straughan, Eddison-

Weslley, 1980. Electrical Machines and Transformers-Principles and

applications, P. F. Ryff, D. Platnick, and J. A. Karnas, Printice Hall.



- 43 -


Course Name Programmable Control Technology Course Code ELT 201

Prerequisites Electrical Circuits-II

Semester 1 2 3 4

Credit Hours 2

L 1 P 2

Course Description: This course presents applied and experimental study for the

use of programmable logic controller. It also enables the trainee to draw the control circuits, and programs the PLC with needed program for industrial applications.


General objective of the course: This course aims to train the trainees the construction of the PLC, the fundamentals of its

operation. It also presents the application of PLC in different industrial areas.

Behavioral Objectives: Prepare the trainee to be able to: Understand the different systems of numbers. Transforming from system to others. Use different systems for simple math. Operations. Deduce the truth table. Write the logic expressions Simplify different logic expressions. Describe the construction of PLC Recognize the importance of PLC in industry Understand the control circuits used in industrial applications. Recognize the construction of PLC and its fundamentals. Understand the different programming methods. Write the PLC program using basic functions such as Timers, counters, Flip

flops, Shift registers, and jump function. Write the PLC programs for different industrial applications, Simulate an industrial process with simple PLC program, Inspect the control circuits, PLC, find out the faults and repair it.


- 44 -


System of Numbers Logic Circuits PLC Construction and Fundamentals of its Operation PLC Programming (LAD – STL – CSF) Basic Functions (Timers – Counters – Flip-flop – Shift Registers – Comparators) Laboratory Applications


- 45 -



1. System of Numbers

Decimal System Binary System Hexadecimal System

Basic knowledge

2. Logic Circuits

Logic gates (AND, OR, NOT, NAND, and NOR) Logic expressions and its representation using logic

gates. Representation of control circuits using logic

expressions and logic gates.

Basic knowledge

3. PLC Construction and Fundamentals of its Operation

PLC construction. Factors affecting the selection of the PLC. Advantages of using PLC in industry.

Basic knowledge

4. PLC Programming

Ladder (LAD) Control System Flowchart (CSF) Statement List (STL)

Basic knowledge


- 46 -


5. Basic Functions

Timers Counters Flip-flops Shift register Comparators Jump function

Basic knowledge

6. Practical Implementation

Operating the three phase Induction Motor (IM) from two different locations.

Fast and slow reversing the direction for three phase IM Starting slip ring IM using starting resistances. Starting delta connected IM using star/delta switch.

Basic knowledge


- 47 -


4 Special applications for PLC programming fundamentals

4 Speed control of IM and direction reversing

2 Staring IM using star/delta switch with possibility of reversing the direction of rotation

2 Operating the three phase IM with two speeds (Dahlander) 2 Speed control of wound rotor IM using starting resistances 2 Temperature control 2 Traffic signal application 2 Stepper motor application 2 Washing machine application 2 Left Application 4 Fault finding of PLC circuits.

References

Programmable Logic Controllers, J. W. Wabb and R. A. Reis, 1994

Programmable Logic Controllers, C. Simpson, 1993 Programmable Logic Controller and their Engineering

Applications, A. Crispin, 1990 The PLC workbook, Clement Jewery, 1993

سلسلة الرضا للمعلومات– للمهندس عيد شحاذة هاللةأجهزة تحكم قابلة للبرمجة


- 48 -


Course Name Power Electronics Course Code ELT 203

Prerequisites Electric Circuits-II

Semester 1 2 3 4

Credit Hours 3 L 2 P 2

Course Description: This course presents the study of the performance and the

characteristics of power electronics elements. It also presents the use of these elements in different circuits as a mean of converting the power from AC to DC and the other way round. The course also shows how to control the voltage and frequency of the source.


General objective of the course: This course is to train the trainees about power electronic elements, their characteristics, how to

operate and use these elements in electrical power and machine circuits. These circuits include rectifiers, controlled rectifiers, DC choppers, AC voltage controllers, and inverters.


1. Know the characteristics of power electronic elements. 2. Describe the characteristics and performance of different semiconductor

devices. 3. Describe the principle of operation of DC chopper circuit. 4. Calculate the average output voltage 5. Describe the principle of operation of single phase AC voltage controller. 6. Compare the operation of single phase AC voltage controller in case of resistive

and inductive loads. 7. Calculate the average voltage and current in rectifier circuits. 8. Compare the characteristics of single phase and three phase circuits. 9. Describe the firing methods and protections of different semiconductor devices. 10. Understand the application of different power electronic circuits in industry 11. Understand protection circuits needed for power electronic circuits 12. Inspect the power electronic circuits, find out the faults and repair it


- 49 -


Semiconductors used in electrical power circuits Rectifier Circuits Controlled Rectifier Circuits DC Chopper Circuits AC Voltage Controller Circuits Inverter Circuits

Laboratory experiments.


- 50 -



6

1. Semiconductors used in electrical power circuits

PN junction Silicon rectifier Application of power diode. Types of silicon controlled rectifier (SCR, GTO, triac,

etc). Methods of firing SCR and its protection Power transistor, MOSFET, IGBT. Operation of power transistor and its protection.

Basic knowledge

4

2. Rectifier circuits

Single phase rectifier circuits with resistive load. Smoothing and filter circuits Three phase rectifier circuits with resistive load. Applications

Basic knowledge

6

3. Controlled rectifier circuits

Single phase controlled rectifier circuit with resistive and

inductive load Effect of inductive load on commutation process in single

phase controlled rectifier circuits. Effect of changing the firing angle on the voltage Three phase controlled rectifier circuits with resistive loads. Applications.

Basic knowledge

4

4. DC Chopper circuits

Principle of operation of DC chopper. Transistorized DC chopper.

Basic knowledge


- 51 -


4

5. AC Voltage controller circuits

Principle of operation of phase control. Single phase AC voltage controller with resistive and

inductive load. Applications.

Basic knowledge

4

6. Inverter Circuits

Principle of operation. Single phase inverter circuits. Three phase inverter circuits.

Basic knowledge


- 52 -


6

1. Semiconductors used in electrical power circuits

Reading the technical specification of power electronic devices.

Measuring the power diode characteristics. Measuring the SCR characteristics.

6

2. Rectifier circuits

Single phase rectifier circuits with resistive load. Three phase rectifier circuits with resistive load. Using capacitors to smooth the rectified voltage.

12


Components of and operation of firing circuits Single phase controlled rectifier circuit with resistive and

inductive load Effect of inductive load on commutation process in single

phase controlled rectifier circuits. Three phase controlled rectifier circuits with resistive loads.

4

4. AC Voltage Controller Circuits

Controlling the AC voltage by changing the phase angle


- 53 -

References

An Introduction to Power Electronics, B. M. Bird, K. G. King, D. A. G. Pedder, John Wiley & sons, 1993

Modern Power Electronics, B. K. Rose, IEEE Press Publication , 1992

Power Electronics: Circuits, Devices and applications, M. H. Rashid, Prentice Hall, 1994 ISBN:81-203-0869-7

Power Electronic: Converters, Applications, and Design Ned Mohan, T. M. undeland, W. T. Robbins, Jon Wiley & sons, 1994


- 54 -


Course Name Three Phase Induction Motor Rewinding & Maintenance W/S Course Code ELT 281

Prerequisites Single phase machine repair and rewinding &Electrical Protection W/S

Semester 1 2 3 4

Credit Hours 2

L

P 4

Course Description: This course concerns with rewinding and maintenance of

three phase induction motors Contact Hours (h/w)

T

General objective of the course: The course aims to enable the trainees to rewind and maintain three phase induction motors.

Behavioral Objectives: Prepare the trainee to be able to: Rewind three phase induction motors. Use the rewinding machine and wind the required number of coils. Bandage the windings. Assemble the motor. Connect and test the motor. Find out faults in three phase induction motors and clear it. Identify preventive maintenance procedures for three phase induction

motors.


Rewinding of three phase induction motors. Fault finding in three phase induction motor and clearing them.


- 55 -


44

1-Rewinding of three phase induction motors:

a) Basics of three phase induction motors rewinding Types of winding and determination of coil pitch. Selection of the suitable wire size. Determination of the suitable number of turns per phase. Calculation of the number of turns per coil. Identification of the coil terminals for internal and external

connections. b) Steps of rewinding three phase induction motors Read name plate data. Dismantle and clean the motor. Remove the windings. Note the winding data and the circuit. Draw the winding diagram. Identify winding connections. Prepare the motor for rewinding


Determine the size and form of the coils. Adjust the rewinding machine and wind the required number of

coils. Insert the coils in the slots and connect the coil terminals. Bandage the windings. Assemble the motor. Connect and test the motor.

c) Exercises: Rewinding of three phase induction motor with a single coil

side per slot. Rewinding of a two speeds motor D/YY (2&4 poles).

Rewinding of a two speeds motor Y/Y (6&4 poles).

A1 up to A9,

B3, B4H1, H2, H3, H4, H5, H6,

H7, H8, H9, H10, H11, H12


- 56 -


12

2-Fault finding: How to dismantle and transport the machine from one another

position. Find out faults in three phase motors and clearing them. Performing final tests after repair.

A1 up to A9, B3, B4

F1, F2, F3, F4, F5, F6, F7, F8

References Top 2 and 4: Electric Power Engineering Proficiency Course, Deutsche Gesellschaft Fur Technische Zusammenarbeit (GTZ)


- 57 -


Course Name Electronic Control of Electrical Machines Course Code ELT 212

Prerequisites Power Electronics

Semester 1 2 3 4

Credit Hours 3L 2P 2

Course Description: The course contains a description of using power electronic

circuits for operation and control of different electrical (DC & AC) motors at different operating conditions.


General objective of the course: The aim of the course is to train the trainees on the fundamentals of electronic control of DC and

AC Motors using power electronic circuits. This course also, aims to enable the trainees to operate and control the motors at different operating conditions


1. Select the proper converter circuit needed for the motor and operating the conditions

2. Determine the average values of the voltages and current in controlled rectifier circuits

3. Determine the RMS values of the voltages and current in AC voltage controller circuits

4. Explain the performance of basic inverter circuits. 5. Operate and control DC motors using DC chopper. 6. Operate electrical motors using power electronic circuits. 7. Explains the characteristics of different electrical motors when operated

by power electronic circuits. 8. Explain and compare different methods of speed control of induction

motor. 9. Explain and compare different methods of speed control of synchronous

motor. 10. Control the speed of the motor and the direction of rotation using power

electronic circuits. 11. Start and brake electrical motor using power electronic circuits. 12. Apply different types of braking to DC motors using DC chopper.


- 58 -


Review the characteristics of electric motor used in industry. Review the power electronic circuits used in industry. Control of DC motors using controlled rectifiers. Control of DC motors using DC choppers. Control of three phase induction motors. Control of three phase synchronous motors. Laboratory experiments.


- 59 -



4

1. Review the characteristics of electric motor used in industry

1- Separately excited DC motor 2- Series and parallel DC motor 3- Three phase induction motor 4- Synchronous motor

Basic knowledge

4

2. Review the power electronic circuits used in industry


2. DC choppers

3. AC Voltage controllers

4. Inverters

Basic knowledge

6

3. Control of DC motors using controlled rectifiers

1. Single phase semi-converter drives

2. Single phase full converter drives

3. Three phase half wave converter drives

4. Three phase semi-converter drives Three phase full converter drives

Basic knowledge

4

4. Control of DC motors using DC choppers

Speed control of DC motor using DC chopper Braking of DC motor using DC chopper

A. Regenerative braking B. Dynamic Braking C. Combined regenerative and dynamic braking

Two quadrant chopper drives Four quadrant chopper drives

Basic knowledge


- 60 -


4

5. Control of three phase induction motors

Control of three phase induction motor using AC voltage controllers

Control of three phase induction motor using inverters

Slip power recovery control of three phase induction motor

Applications

4

6. Control of three phase synchronous motors.

Control using frequency Control using inverters


- 61 -


12

1. Control of DC motors using controlled rectifiers

Single phase semi-converter drive Single phase full converter drive Dual converter drive Three phase half wave converter drive Three phase semi-converter drive Three phase full converter drive

4

2. Control of DC motors using DC choppers

Speed control of DC motor using DC chopper Braking of DC motor using DC chopper

12

3. Control of three phase induction motors

Control of three phase induction motor using AC voltage controllers

Control of three phase induction motor using inverters

Slip power recovery control of three phase induction motor

References

Power Electronics: Circuits, Devices and applications, M. H. Rashid, Prentice Hall, 1994 ISBN:81-203-0869-7

Power Electronics and Motor Control, W. Shepherd, L. M. Hulley, and D. T. W. Liang, Cambridge, 1995

Electric Motor and Drives: Fundamentals, Types and Applications, Austin Hughes, Heinemann Newnes, 1990


- 62 -


Course Name Automatic Control Technology Course Code ELT 204

Prerequisites Electric Circuits-II

Semester 1 2 3 4

Credit Hours 2

L 1P 2

Course Description: The course covers, terminology, concepts, and principles

of automatic control technology. It gives practical examples and explains the basic definitions of automatic control systems with the aid of the block diagram. Emphasis is on the applications of well-established methods with the aid of examples and computer programs to determine the constants of these controllers.


General objective of the course: The aim of the course is teaching the trainees the fundamentals of automatic control technology

that enable the student to understand the control system used in industry. This course enables the trainee apply some simple control system using ready made packages and use computer for this purpose. Behavioral Objectives: Prepare the trainee to be able to:

1. Distinguish between open loop and control loop systems. 2. Sketch the block diagram and perform simple block diagram

simplifications. 3. Understand the importance of automatic control in different fields. 4. Understand the methods of representing the basic control system. 5. Distinguish between analog and digital controllers 6. Describe process control and process controllers 7. Describe process control and process controllers 8. Describe the physical elements of each part of the control system 9. Explain the role of each element in the system. 10. Explains the main control methods.


Fundamentals of automatic control Types and characteristics of industrial control systems. Closed loop control systems. Laboratory experiments.


- 63 -



6

1. Fundamentals of automatic control

Importance of automatic control (practical examples) Applications of automatic control in different fields Process representation using block diagram or power flow

graph Basic definitions of control system (input, output, error,

and reference) Open loop and closed loop system: Concepts, advantages,

and disadvantages Simplification of block diagram

Basic knowledge

6

2. Types and characteristics of industrial control systems

Definition of analog and digital control Definition of process control Servomechanism Basic components of industrial systems Final Control elements

D. Control valves E. Electric motors

Sensors and transducers Controllers Measurements in control technology A. Position, displacement, velocity, acceleration. B. Force, temperature, flow rate, pressure, and level. C.

Basic knowledge

4

3. Closed loop control system

Define the closed loop desired characteristics of the controlled system

Explain the role of each elements of P, PI, and PID controllers in closed loop system settings

Use of SIMULINK to illustrate the concepts introduced above

Basic knowledge


- 64 -


4

1. Introduction to equipment and devices:

8

2. Analysis of open loop industrial system response

Step response analysis of thermal system Step response analysis of dc motor Step response analysis of level control system

16

3. Analysis of closed loop industrial system response

Closed loop control of thermal system A. Influence of proportional controller gain on the

steady state error and settling time. B. Zero steady state error using PI controller

Closed loop control of a dc motor system A. Influence of proportional controller gain on the

steady state error and settling time. B. Zero steady state error using PI controller C. Effect of adding d type element to the PI controller

Closed loop control of thermal system A. Influence of proportional controller gain on the

steady state error and settling time B. Zero steady state error using PI controller


- 65 -

References

Modern Control Engineering, K. Ogatta, Prentice Hall, 1994

Modern Control System, R. C. Dorf, Eddison Wesley, 1990

Control System Design, C. T. Chen, Saunders College Publishing, 1993

Feedback Control System, John Van De Vegta, Prentice Hall, 1990

Automatic Control Systems, B. Kuo, Prentice Hall


- 66 -


Course Name Small Electric Machines Course Code ELT 213

Prerequisites AC Machines

Semester 1 2 3 4

Credit Hours 2

L 2

P

Course Description: The course describes a number of small electric machines

widely used in practice such as: Single Phase Induction Motors. Stepper Motors. Tacho-Generators. Servo-Motors. Universal and Repulsion Motors. Synchros.

The course covers construction features, principles of operation, performance, and the application of these small machines.

Contact Hours (h/w)

T

General objective of the course: The course aims to give the trainees basic knowledge of theory, performance analysis, and

application of small machines widely used in practice. Behavioral Objectives: Prepare the trainee to be able to:

1. Describe types and construction of single phase induction motors. 2. Describe the methods of starting of single phase induction motors. 3. Describe how the main and auxiliary windings are wound. 4. Describe types, construction, and theory of operation of stepper motors. 5. Describe types, construction, and theory of operation of tacho-generators. 6. Describe the construction and theory of operation of servo-motors. 7. Describe the construction and theory of operation of the universal and repulsion

motors. 8. Describe types and construction of synchros. 9. Describe the different industrial applications of small machines


Single Phase Induction Motors. Stepper Motors. Tacho-Generators. Servo-Motors. Universal and Repulsion motors. Synchros.


- 67 -



8

1- Single Phase Induction Motors: Construction. Types of single phase induction motors and methods of

starting: a- Split phase motors. b- Capacitor start motors. c- Capacitor run motors. d- Capacitor start capacitor run motors. e- Shaded pole motors. Forward and backward fields. Theory of operation. Equivalent circuit. Torque speed relation. Losses and efficiency. Applications of single phase induction motors.

B1, C1, C2, C3, C6, D5, D8, D9,

E1, E3, E4, E7, E8, E9, J1, J2, J4, J5,

J6

4

2- Stepper Motors:

1. Types of stepper motors: Salient pole permanent magnet and hybrid.

2. Construction and theory of operation. 3. Calculation of step angle. Logic tables for the control circuit for both forward and

backward rotations. Applications of stepper motors.

B1, C1, C2, C3, C6, D5, D8, D9,

E1, E3, E4, E7, E8, E9, J1, J2, J4, J5,

J6

4

3- Tacho-Generators: Types of tacho-generators:

a- DC tacho-generators. b- Induction type tacho-generators. c- Synchronous tacho-generators. Construction and theory of operation. Reasons for the errors in the readings of tacho-generators. Calibration of tacho-generators.

B1, C1, C2, C3, C6, D5, D8, D9,

E1, E3, E4, E7, E8, E9, J1, J2, J4, J5,

J6


- 68 -


4

4- Servo-Motors: The requirements in the design of servo motor. Applications of servo motors. Construction and theory of operation Drag-Cup servo

motors. Speed Torque relation of the two phase servo motors. DC servo motors:

a- Printed circuit motors. b- Moving coil motors.

B1, C1, C2, C3, C6, D5, D8, D9,

E1, E3, E4, E7, E8, E9, G5, G6, J1, J2,

J4, J5, J6

4

5- Universal and Repulsion motors:

4. Construction and theory of operation of universal motors. 5. Construction and theory of operation of repulsion motors.

B1, C1, C2, C3, C6, D5, D8, D9,

E1, E3, E4, E7, E8, E9, J1, J2, J4, J5,

J6

4

6-Synchros: Elements of self synchronous systems:

a- The transmitter. b- The control transformer. c- The control deferential. d- The control receiver. Applications of synchros.

B1, C1, C2, C3, C6, D5, D8, D9,

E1, E3, E4, E7, E8, E9, J1, J2, J4, J5,

J6

References

Principles of Electric Machines and Power Electronics, P.C Sen, Jon Wiley & Sons, Inc, 1997.


Electric Machines: Steady State Theory and Dynamic Performance, A. E. Fitzgeraled, Mc. Graw-Hill, 1992.


- 69 -


Course Name Electric Drive Course Code ELT 214

Prerequisites AC Machines

Semester 1 2 3 4

Credit Hours 2

L 2 P

Course Description: The course describes the fundamentals of mechanics, types and characteristics of loads, the required characteristics and properties of driving motors, DC &AC motors as driving machines, electric traction, electric braking, and the selection of the suitable driving motor.


General objective of the course: The course aims to give the trainee an introduction to mechanical quantities, mechanics, and

electric driving systems, characteristics of driving motors and loads, and the applications of the different electric drives. Behavioral Objectives: Prepare the trainee to be able to:

1. Know of the fundamentals of mechanics 2. Know of the different types of loads. 3. Know the different types and construction of driving motors. 4. Know the characteristics of the different types of driving motors. 5. Know how to choose the proper motor for a certain load. 6. Know the effect of loads on the driving systems. 7. Know the different methods of electric braking, and how to apply each method. 8. Know how to protect driving motors 9. Know the methods of cooling of the driving motors. 10. Know the shapes and constructions of driving motors. 11. Know the advantages and disadvantages of mechanical and electrical braking.


Fundamentals of mechanics. Types and characteristics of loads. Characteristics and properties of driving motors. DC & AC Motors as driving motors. Electric traction. Electric braking of motors

Choice of the suitable motors for certain loads.


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2

1- Fundamentals of mechanics: Relations between distance, speed, time and acceleration. Mass, weight, and inertia. Translational and rotational motions. Components of load torque.

Basic skills

6

2- Types and characteristics of loads:

Nature and classifications of loads. Characteristics curves of loads. Determination of the stable operating point. Dynamics of driving systems.

Calculation of motor power. Effect of loads on driving systems. Starting time.

C5

4

3- The required characteristics and properties of driving motors: Characteristics of DC & AC drive motors. Shape and construction to cope with surrounding

atmospheres. Protection of driving motor and methods of cooling.

B1, C1, D5, D8, E1, E9, J1, J2, J4,

J5, J6

4

4- DC &AC motors as driving machines: General characteristics of driving motors. DC motors as driving machines. AC motors as driving machines.

,6C, 5C, 3C, 2C ,7E, 4E, 3E, 9D

6J, 4J, 2 J,1J, 8E


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6

5- Electric traction: Types of electric traction. Advantages and disadvantages of electric traction. Traction force required on traction wheels. Traction power. Dynamics of train movements. Types of transportation services. Speed time curves.

C2, C3, C5, C6,

D9, E3, E4, E7, E8, J1, J2, J4, J6

4

6- Electric braking: Regenerative braking. Dynamic braking. Rheostat braking. Reverse current braking (plugging).

D9,E8

2

7-Choice of the driving motor: Factors considered in choosing the proper motor to drive a

specific load. Selection of the suitable drive motor with the help of load

torque curve and torque characteristics of the motor.

Basic skills

References

אאאאK K–א–KKK

אאאKKאאKא–K

Electric Motors and Drives Fundamentals, A. Hughes, Heinemann Newnes, 1990.

Electric Drives: Concepts and Applications, V. Subrahmanyam, McGraw-Hill, 1990.

Utilization of Electric Power & Electric Traction, G. C. Garg, KHANNA PUBLISHERS DELHI, 1988.


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Course Name Power Stations and Protection Course Code ELT 247

Prerequisites Alternating Current Machines

Semester 1 2 3 4

Credit Hours 2

L 1

P 2

Course Description: The course describes two main parts; Generating power

stations and Protection. The first part introduces the trainees to the construction of different types of generating power plants. It trains the trainees how to operate generators, and how to control the power flow.

The second part describes the protection methods for different electrical machines. It discusses different faults, relays and circuit breakers.

Contact Hours (h/w)

T 1

General objective of the course: The aim of the course is to trains the trainees the construction of different types of power plants,

operation of power generators, and control of power flow. It also, gives the trainees the principles of power system protection such as: components of protection systems, protective relays, circuit breakers, protection schemes and applications.


1. Describe the types and components of generating stations. 2. Explain the advantages and disadvantages of the different types of power

station. 3. Describe the types of turbo-alternators. 4. Control the voltage and frequency of the generator. 5. Mention the conditions of connecting the alternators to in parallel. 6. Synchronize the alternator to the power network. 7. Describe the behavior of the alternators when connected to infinite power system.8. Control of active and reactive power in power stations. 9. Distinguish between the different types of faults. 10. Describe different types of protective relays, relay selection and testing. 11. Distinguish between different types of protective relays 12. Describe different types of circuit breakers. 13. Describe different protection schemes. 14. Distinguish between the different types of generator faults


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Types of power generating plants. Control of power generators. Transmission of the generated power. Principles of power system protection. Protection of generator. Protection power transformer. Protection of electric motor. Laboratory Experiments


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6

1. Types of power generating plants

Types of power stations i. Diesel power station

ii. Gas power station iii. Steam power station Block diagram for different power stations Power flow

G1 Basic knowledge

4

2. Control of power generators

Control of voltage and frequency. Connecting the generators to infinite bus bars. Conditions of connecting the generators to infinite

bus bars. Control of active and reactive power.

B1, G2, G3, G4, G5, G6

2

3. Transmission of the generated power.

Advantages of transmitting the power at high voltages.

Description and type of over head lines (Towers, cables, and insulators).

Types of under ground cables.

G7, G8 Basic knowledge

10

4. Principles of power system protection

Importance of power system protection Types of faults (short circuits, over loads, open circuit,

and winding faults). Instruments used in power system protection (fuses,

relays, circuit breakers, and voltage and current transformers).

Basic knowledge A4, I11, J4,

A5, B5, B7, B8, D9, G9, I4, I10,

I11, J4,F5


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Cont.

Types of protective relays (electromagnetic, thermal, induction, and digital).

i. Over current relays ii. Directional relays

iii. Distance relays iv. Over and under voltage relays Requirements of power system protection (sensitivity,

speed of operation, reliability, main and backup protection, etc)

Basic knowledge A4, I11, J4,

A5, B5, B7, B8, D9, G9, I4, I10,

I11, J4,F5

4

5. Protection of generator Over load protection Stator winding protection Field winding protection Phase to phase fault protection Reverse power protection Over speed protection

A8, C7, C8, F5, J3, J4

4

6. Protection of power transformers Over load protection Transformer winding protection against different

faults Protection using Buchholz relay Differential protection

A8, C7, C8, F5, J3, J4

4

7. Protection of electric motors

6. Over load protection using thermal relays Locked rotor protection Unbalanced phases protection Protection against single phase operation Protection against earth faults. Under voltage protection Protection against short circuit between phases

A8, C7, C8, F5, J3, J4


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2

1. Study the power station model:

Study the laboratory power station model.

Basic Skills B1, G2, G3, G4,

G5, G6

10

2. Characteristics of synchronous machines: At no-load. Under short circuit conditions. Under load conditions with different types of loads. Synchronizing alternators with infinite bus-bars Control of active and reactive power

B1, G2, G3, G4, G5, G6, G9, G10

2

3. Transmission of power to the consumers: Deferent types of transmission lines under load conditions.

Basic Knowledge

12

4. Protection devices Over current relays. Earth leakage relays. Deferential relays. Over voltage relays. Over current relays.

A8, C7, C8, F5, J3, J4

4

5. Protection: Static protection of transmission lines. Protection against rotor winding ground fault Protection against stator winding ground fault

A8, C7, C8, F5, J3, J4

6

6. Protection of generator Protection against rotor winding ground fault Protection against stator winding ground fault Protection of generator against over load Deferential protection of generator Reverse power protection

A8, C7, C8, F5, J3, J4


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References

Electrical Machines Devices and Power Systems, 3rd edition Prentice Hall, 1997

Electrical Power Systems, J. M. Harison, Prentice Hall, 1996 Application Guide For Industrial Generator Protection, GEC

Company, 1995 Transformer Protection Application Guide, Basler Electric

Company, 1996 Application Guide Lines For protection of Industrial Three Phase Motor, GEC Company, 1995


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Course Name Control of Electrical Motors W/S Course Code ELT 283

Prerequisites AC machines + Electric circuits-II

Semester 1 2 3 4

Credit Hours 3

L

P 6

Course Description: This course describes the operation and control circuits

used with three phase induction motors, using conventional methods and PLC. The operation and control of these circuits use three pole switches, electromagnetic switches, and push buttons, The operation and control using the PLC device by (Easy, logo, S-7……)

It also presents the methods of fault finding and repair.


General objective of the course: The course aims to teach the trainees the circuit needed to operate and control three phase

induction motors. These circuits include operation, starting, speed control, and reversing the direction of rotation. This course enables the trainees to find out faults in these circuits and clear these faults.

The course also aims to teach the trainees how to use the PLC to operate and control three phase induction motors. Behavioral Objectives: Prepare the trainee to be able to:

1. Describe the components and construction of three phase induction motors. 2. Read and connect the operation circuits of three phase induction motors. 3. Read and connect the control circuits of three phase induction motors. 4. Find out the faults and clear these faults. 5. Read and connect the operation and control circuits of three phase induction

motors. 6. Representing operation and control circuits using logic expressions and logic

circuits. 7. Use the PLC to operate and control three phase induction motors.


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Construction of three phase induction motors. Three phase induction motor operation and control panel assembly. Operation circuits of three phase induction motor. Starting circuits of three phase induction motor. Reversing of three phase induction motor circuits Faultfinding and clearance in control circuits of three phase induction

motor. Components and Construction of the PLC. Operation of three phase induction motor using PLC. Starting of three phase induction motor using PLC. Reversing the direction of rotation of three phase induction motors using

PLC.


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12

1- Three phase induction motor operation and control panel assembly: Construction of three phase induction motors. Components and types of three phase induction motor

(stator, rotor, poles, etc.) Reading the name plate data of the machine Types of operation control and protection switches

contactors and relays. Rules and regulations for installation of operation and control

panels. Layouts of the control panel. Exercise: Fixing operation and control devices in the control

panel.

Basic knowledge

6

2-Three phase induction motor operation and reversing the direction of rotation circuits: Operating of induction motor using three pole switches. Operating of induction motor using magnetic contactor. Reversing the speed of induction motors using magnetic

contactor (slow reversing). Reversing the speed of induction motors using contactor and

limit switch (fast reversing). Operating of induction motor at two speeds (Dahlander)

using magnetic contactor and timer

Basic knowledge

A8, F1, F3, F4, I5, I7, I10


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20

3-Starting and speed control circuits of three phase induction motor: Direct starting. Starting using star delta switch. Starting using relays and timers with star delta switch. Starting of Dahlander (Δ/YY) two speed induction motor using

relays and timers, in addition of reversing the speed. Operation of two speed (Y/Y) induction motor using contactors

and time delay relay.

Basic knowledge

I4, I5, I7, I10, I11

4-Fault finding in operation circuits of three phase induction motor and clearing them: Fault finding in operation and reversing the direction of rotation circuits of three phase induction motor: Following the current path in the operation and reversing the

direction of rotation circuits from the source up to the motor using the layout diagram.

Find the fault in operation and reversing the direction of rotation circuits and its reasons, and fixing it.

Carry out run tests after fault clearance

A8, F1, F3, F4, I5, I7, I10

10 5-Fault finding in starting and speed control circuits of three phase induction motor and clearing them: Fault finding in starting and speed control circuits of three phase induction motor: Following the current path in the starting and speed control

circuits from the source up to the motor using the layout diagram.

Find the fault in starting and speed control circuit and its reasons, and fixing it.

Carry out run tests after fault clearance

F1, F2, F3, F4, F5, F6, F7, F8


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6-: Operation and reversing the direction of rotation of three phase induction motor circuits using PLC: Components and construction of the PLC device: The construction of the device. Methods of connection. Methods of programming.

Operation circuits of three phase induction motors using the PLC device: Operating of induction motor using magnetic contactor. Reversing the speed of induction motors using magnetic

contactor (slow reversing). Reversing the speed of induction motors using contactor and

limit switch (fast reversing).

A8, F1, F3, F4, I5, I7, I10

24

7 Starting and speed control circuits of three phase induction motor using the PLC device: Starting circuits: Starting using relays and timers with star delta switch, and PLC

device. Speed control circuits: Operation and control of speed of Dahlander (Δ/YY) two speed

induction motor using contactors, using to the PLC device. Operation and control of speed of Dahlander (Δ/YY) two speed

induction motor using contactors, and reversing the direction of rotation, using to the PLC device.

Operation of two speed (Y/Y) induction motor using contactors and the PLC device.

A8, F1, F3, F4, I5, I7, I10


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References

Top 2 and 4: Electric Power Engineering Proficiency Course, Deutsche Gesellschaft Fur Technische Zusammenarbeit (GTZ)

Programmable logic Controllers, D. Frank, Petruzella, McGraw-Hill.

The PLC workbook, Celement Jewery, 1993. K –א

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