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PAF- KARACHI INSTITUTE OF ECONOMICS & TECHNOLOGYDepartment of Electronics & Telecommunication Engineering COURSE TITLE: ELECTRICAL MACHINES COURSE CODE: EE-324Credit hours: 3+1PRE-REQUISITES: BE-IIContact hours: 5 Hrs/week TEACHING FACULTY: Shakil Ahmad/Noman Bashir

Course Introduction: This course is developed for students of electronics engineering. Students taking this course will be exposed to introductory theoretical as well as practical concepts of Electrical Machines. Key topics included in this course are TRANSFORMERS, DC GENERATORS, DC MOTORS, AC MACHINES, SYNCHRONOUS GENERATORS & SYNCHRONOUS MOTORS

Course Objectives: Core of the objective is learning and developing concepts of electrical machines.

Learning Outcomes: On completion of course students should be able to develop:

Understanding of the basic concepts of electrical machines Apply their knowledge of power systems. Design, analyze and troubleshoot electrical circuits Design the electrical circuits for any industrial requirements

LECTURE PLAN (Fall 2014) Session No.ContentsContents to be covered from(Books, Chapter No., Page No.)

1TRANSFORMERSPurpose , application and classification of Transformers: Ideal and Practical Transformers

2Core designs, core material ,winding types, Behavior of transformers at no-load

3Basic emf equation of transformer; Equivalent circuit of transformer, modeling of major losses , Application

4Open circuit and short circuit Test; Application Problems

5Voltage regulation ( Pharos representation ) & efficiency of transformer; condition for maximum efficiency of transformer; Application problem

6Three phase transformer; connection types; transformers bank; Application problems

7DC GENERATORSConstruction of dc machine ; Armature winding lap& wave winding ; equivalent circuit of;

8Wave wound armature; separately and self excited ; shunt generator voltage build up ; magnetization curves; load behavior terminal voltage control

9Voltage regulation; Application problems; No load , load behavior and characteristic of Dc series generator ;Application problem; Differential and cumulative compound Generator ( Log shunt and shunt);Application problem

10Terminal voltage control of cumulative compound generator ;Application problem

11DC MotorsDc shunt motor, operating principle, load and no-load behavior; torque speed characteristic

12Dc series motor, operating principle, load and no-load behavior; torque speed

13Dc Compound motors, operating principle, load and no-load behavior; torque speed

14Seed control of dc motors; Dynamic braking and pluuing;

15Torque and power limitation under Rf and Va control method

16Solid state speed control of dc motors

17AC MACHINESAc Machinery fundamental; Rotating field concept.

18Single phase induction motor, split phase construction ;torque speed characteristic of reactor start

19Capacitors start motor; shaded pole motor; speed control of single phase induction motors.

20Universal motor, Reluctance motor and Hysteresis motor construction and characteristic

21Three Phase induction motor, Squirrel cage and wound rotor construction ; Operating principle; concept of slip

22Torque equation and constructions and condition s for maximum torque ; Torque speed curve for 3 phase induction motor

23 Variation of torque with rotor resistance ; Solid state speed control of induction motor

24SYNCHRONOUS GENERATORSSynchronous generator construction , equivalent circuit , operating principle; concept of synchronous reactance, field excitation and exciters

25Effect of load changes in a synchronous generator; pharos diagram representation

26Power and torque in a synchronous generator; static stability limit

27Parallel operation of synchronous generator under isolated loads and on infinite bus; concepts of infinite bus.

28Effect of varying excitation on infinite bus , synchronous motor construction & operation

29SYNCHRONOUS MOTORSStarting a synchronous motor; power and torque in a synchronous motors under load

30

Torque speed characteristics of synchronous motor; effect of varying excitation under no-load and full load (V Curve);Review & Tutorial

Text Books:1. Stefan J. Chapman Electric Machinery fundamentals Mc Graw Hill(1999) Reference Books:1. Theodore Wildi Electric machines drives and power systems Prentice-Hall 2000

Student Assessment Information Sheet

Theoritical ComponentNo.DescriptionMark Distribution (%)

1.

2.

3.

4.

5.

Final Exam

Hourly Tests

Class Assignments

Class Quizzes GSS & Class Participation 50%

25%

10%

10%

5%

TOTAL 100%

Laboratory ComponentNo.DescriptionMark Distribution (%)

1.

2.

3.

Project Viva and SPEC Participation

LabWork

Lab Exam

50%

30%

20%

TOTAL 100%

B.Remarks1. The students whos absentees from the class exceed six (6) shall be dropped from the course without any warning. [ The name of the student shall disappear from the attendance roll. ]2. Other than the planned schedule of assessments as mentioned in Sec. B above, there shall be no make-up test of any kind. 3. All assessed components [50% sessional marks] shall be returned to the students.4. No claim for any correction, review or scrutiny shall be entertained one week after the return of answer scripts.