PE&DS Slide Group 1 2014

8/10/2019 PE&DS Slide Group 1 2014

http://slidepdf.com/reader/full/peds-slide-group-1-2014 1/25

School of Electrical and Electronic Engineering © Dr. N. Ertugrul

POWER ELECTRONICS SYSTEMS

Nesimi ERTUGRULRoom : 3.54 (Ingkarni Wardli , Innova 21)

E’mail: [email protected]

POWER ELECTRONICS

&DRIVE SYSTEMS




REFERENCES BOOK(S)

1. Mohan N., Undeland T.M. and Robbins W.P., Power Electronics,

Converters, Applications and Design, John Wiley and Sons.

2. Rashid M.H., Power electronics, Circuits, Devices and

Applications, Prentice-Hall.

3. N. Ertugrul, LabVIEW for Electric Circuits, Machines, Drives, and

Laboratories, Prentice Hall, 2002.

Lecture Notes




ASSESSMENT

2 Quizzes 40%

Final Examination 60 %




2014 Time Table2014 TIME TABLE

MONDAY TUESDAY WEDNESDAY THURSDAY FRIDAY GUEST LECTURES and OTHER

ACTIVITIES

9:00 Distributed Gen.

EM305/318, Combined Labs

PRACTICALS

SOLAR: 20 August, 27 August

WIND: 10 Sept, 17 Sept

Distributed Gen.


PRACTICALS

SOLAR: 22 August

WIND 12 Sept

Distributed Generation Tech

Guest Lectures (to be confirmed) byJohn Haddow/Vinot/Brad

George BercholcsCraig Oakeshott

Joshua Smith

TINDO Visit

To be confirmed

Power Electronics

Guest Lectures (to be confirmed) byPeter Hayles (Thermofisher)



PRACTICALS

SOLAR: 20 August, 27 AugustWIND 10 Sept, 17 Sept

Distributed Gen.


PRACTICALS

SOLAR: 22 AugustWIND 12 Sept



PRACTICALS

SOLAR: 20 August, 27 August

WIND 10 Sept, 17 Sept

Distributed Gen.


PRACTICALS

SOLAR: 22 August

WIND 12 Sept

12:00 Distributed

Gen.Barr Smith South,

534

ForumLECTURES:28 Jul - 15 Sep

6 Oct - 27 Oct

Power Electronics

QUIZES:Quiz 1: 26 August, EM205

Quiz 2: 14 Oct, EM205

Distributed Gen.QUIZES:Quiz 1: 19 August, EM205

Quiz 2: 16 Sept, EM205Quiz 3: 14 Oct, EM318/319

Quiz 4: 28 Oct, EM20513:00 Distributed

Gen.Barr Smith South,

534

ForumLECTURES:28 Jul - 15 Sep

6 Oct - 27 Oct

Power Electronics

Engineering South, S112LECTURES:

31 Jul - 18 Sep9 Oct - 30 Oct

Power Electronics

Ligertwood, 231, LawLecture Theatre 1

REVIEW & TUTORIALS:Review: 8 Aug, 15 Aug

Tutorials: 22 Aug, 5 Sept, 19Sept, 10 Oct, 17 Oct, 24 Oct,

31 Oct

Distributed Gen.EM305/318, Combined LabsPRACTICALS

SOLAR : 22 August, 29 August


14:00 Distributed Gen.Barr Smith South, 534

ForumTUTORIALS:13 Aug, 10 Sept, 8 Oct, 22 Oct

Power Electronics

Engineering South, S112LECTURES:

31 Jul - 18 Sep

9 Oct - 30 Oct

Distributed Gen.EM305/318, Combined LabsPRACTICALS



15:00 Distributed Gen.EM305/318, Combined LabsPRACTICALS



Distributed Generation Tech : 24 Lectures, 3 Quizzes and 4 Tutorials, 2 Practicals

Power Electronics: 24 Lectures, 2 Review Lectures, 2 Quizzes and 7 Tutorials


http://slidepdf.com/reader/full/peds-slide-group-1-2014 5/25School of Electrical and Electronic Engineering © Dr. N. Ertugrul

Lecture Topic

1-2

2-3

3-5

5-6

6-7

7-8

8-9

9-11

11-13

13-14

14-18

18-19

19-20

Introduction

Definitions, efficiency and control concepts, methods of analysis.

Feedback and Isolation Devices

Pulse transformers, optocouplers, isolation amplifiers, current transducers, and measurement practices

Switching DevicesDiodes, Thyristor, GTO Thyristor, Triac, BJT, MOSFET, IGBT, application requirements, series and parallel connections.

Switching characteristics of devices, power losses SOA, Protection (Overcurrent, Overvoltage, excessive di/d and dv/dt), Cooling and Thermal Design

Rectifiers

Single Phase, Three Phase, the Effect of the Phase inductance, Operating Modes

AC -AC Converters

AC Choppers, Cycloconverters

DC-DC ConvertersQuadrant Operation, Converter Configurations

Inverters

Single Phase, Three Phase InvertersCurrent Source and Voltage Source Inverters

Waveform Shaping/Harmonic Elimination

Power supplies

Uninterruptible, switchmode

Hard and soft-switching, resonant circuits

Advanced energy-efficient motor drives Review of motor theory, control principles, vector and servo

drives (stepper, DC, induction, brushless PM and switched-reluctance), Motor and drive selection andapplication. System design, implementation and control.Computer interfacing, network communication.

EMI in Power Electronics Systems

Their effects and means for correction



Introduction to Power Electronics

Electrical versus Electronic Engineering : They differ in use of electricity

Electrical Engineering : as a form of energy (audio amplifiers, radio antennas,

electric motors, power supplies)Electronic Engineering : as a means to carry and process information (computers,communication protocols and networks, software)

Power Electronics :

Branch of electrical engineering, uses electronic circuits to process electric power tochange its characteristics (magnitude, AC/DC, frequency etc)

It is “switching electronics” (High power: MW, and Low Power: W )

Key power electronic technologies :

a) Power electronic devices : diodes, transistors, thyristors

available power ratings limit application of power electronics

b) Control electronics : e.g. microcontrollers, sensors, gate drivers



Brief History

DEVICE CAPABILITIESVoltage Current Frequency

1950s : Bipolar Junction Transistor (BJT) med med medapplications : power supplies

1960s : Thyristor high high lowapplications : power systems

1970s : Microprocessor

low-cost control electronics

1990s : Insulated Gate Bipolar med med med Junction Transistor (IGBT)applications : electric motor drives

Early 1990 : Metal Oxide Semiconductor low med highField Effect Transistor (MOSFET)

applications : power supplies



around 1980

Text books!3 Phase5kW Inverter



1998, 3 phase, 0.75kW !2008, 3 phase,

Integrated inverter

module for electric

vehicles, 150 kW

Size and Cost Power Rating



Motor control

INDUSTRIAL APPLICATIONS

SMPSCONSUMER APPLICATIONS

MAJOR APPLICATION AREAS OF POWER ELECTRONICS SWITCHING DEVICES




Why Power Electronics?

Power Electronics : Conversion, control, and conditioning of electric powerusing electronic circuits

The main task is to use the electrical energy more efficiently to accomplish certain jobs During this task it controls various parameters such as

the speed, position and torque of an electric motor

the temperature of an oven

the rate of an electrochemical process, or

the intensity of lighting.

Power

Electronics

Control

Electronics

Electrical Device (Load)

e.g. motor, generator

solar cell, heater

or light source

electric

energy

electric

energy

electric, mechanical

thermal or light energy

sensor

feedback




BEFORE DESIGN

“Great application notes ! “

“This will be easy !”

AFTER IMPLEMENTATION

“The data sheet said it could handle 1 kW !”“What happened to the efficiency !”

ANSWER :

“WE SHOULDN’T DO ONLY ELECTRICAL

DESIGN !”




• Electrical / Electronic Design• Computation Related Design• Mechanical Design

• Electromagnetic Design• Magnetic Design• Thermal Design

SUPPLY

LOAD




+Vdc

LOAD

? ?

POSSIBLE ENERGY CONVERSIONS




POSSIBLE ENERGY CONVERSIONS

in POWER ELECTRONICS

AC DC

DCAC

~

~ _

_~

Rectifiers

AC DC _

DC-to-DCconverters

DC

DC

_

_

DCAC~

_

Inverters

AC-to-ACconverters

AC

AC

~

~




Diode

Thyristor: SCR , GTO ….MCT

BJTMOSFET

IGBT

Switching Characteristics and Losses

SWITCHING DEVICES




Ideal Switch !

• blocks voltage allowing no current

through the switch

• conducts current with no voltage

drop across the switch







Quadrant Concept

i

v

- v+ i

+ v+ i

+ v- i

- v- i

(I)(II)

(III) (IV)

S O U

R C E

C O N V

E R T E R

L O A D

± ii

± vi

± i0

± vo

+ -v

i

Blocking CONDUCT # of DEVICE TOPOLOGY




BlockingVOLTAGE

CONDUCTCURRENT

# ofQUAD

DEVICE or TOPOLOGY

uni : unidirectional bi : bidirectional

uni 1uni

bi 2uni

uni 2bi

bi 4bi

Th Ch i f T l




The Choice of Topology

Hundred of converter circuits exist.

The choice of topology is important, butsuccess depends on detailed design andcomponent selection.

However, device behaviour imposesfundamental limits on converter behaviour.





DIODE CHARACTERISTICS





i

v

Forwardvoltage drop Vf

Maximumforward current

Imax

ConductingRegion

BlockingRegion

Reversebreakdownvoltage VBR

Offset

voltage

Reverseleakage

currentIr






(... continued)

• Forward turn on time , tfr • Reverse recovery time , trr

• Effect of T j on characteristics

• Thermal impedance• Packaging options and polarity

NOTE ! : No two diodes have identical

characteristics !Parallel/Series connections !

Documents

PE&DS Slide Group 1 2014