Tentative

Date

Actual

Date

Lecture

NoContent Remarks

1 Journey of electrical engineering program, Electrical and Electronics difference

Subject Introduction: Meaning of "Power Electronics", Significance and Applications

2 Subject Introduction: A simple circuit example, Concept of Power Electronics, Block diagram,

Interdisciplinary nature, Syllabus, Teaching Scheme and Text Books

3 DC-DC converter example: Dissipative realization and SPDT switch, Efficiency comparison, Step down

chopper circuit, Duty cycle, Average and RMS expressions, Input effective resistance, Ripples, Pi, Po and

efficiency of power transfer and converter efficiency

Unit II

Topic 1

4 Control techniquies: Frequency modulation, Pulse width modulation, and current limit control.

5 Generation of gate signals, Modulation index, Buck converter circuit analysis, Continuous and Discontinuous

conduction mode of operation

6 Analysis of boost converter circuit, Average output voltage expression, Variation with respect to duty cycle,

Limitations

7 Analysis of buck-boost converter circuit, Average output voltage expression, Introduction to four quadrant DC-

DC converter operation

8 Power Semiconductor devices, Ideal Switch Characteristics, Power Diode

9 Power Diodes: Internal Structure, Ratings, Reverse Recovery: Softness factor, Types, Commercially

available diodes

10 Construction, Operation, Input/Output/Transfer Characteristics, Symbols for Power Transistor: Power BJT,

Darlington Pair

11 Comparision of BJT and FET: Switching & Conduction losses, Input impedance, Temperature coefficient,

Symbol, Operation & Control

12 Construction, Operation, Input/Output/Transfer Characteristics & Symbols for Power MOSFET, Types

13 Construction, Operation, Input/Output/Transfer Characteristics & Symbols for Insulated Gate Bipolar

Transistor, Equivalent circuit, Packaging

14 Four Layer PNPN devices: Thyristor construction, Operation, VI Characteristics, Turn on & Turn off methods

(commutation), Types

15 Four Layer PNPN devices: GTO VI Characteristics, Turn on, Turn off (commutation), Challenges. MCT

Symbol and features

16 Two Transistor analogy of SCR. Latching and holding current

17 Comparision of power devices: Controllability, Power rating, Switching frequency, Polarity of blocking voltage

and direction of current conduction, Different configurations of bipolar bidirectional switches, Applications

18 Few power devices manufacturing companies, Need for series and parallel operation of SCR, Issues and

Solution, Uniform voltage sharing networks and calculations, Uniform current sharing with R and L

19 Gate triggering requirements, Uni Junction Transistor, Construction & characteristics

20 UJT based oscillator circuit: Design, wave forms and analysis, Verification, Simulation Tools: Advantages

and Limitations

21 Latching and holding current based calculations, Average switching and conduction losses calculations,

Thermal Resistance deifinition

22 Junction - Case, Case - Sink and Sink - Ambient thermal resistances, Electrical equivalent thermal model Power

Electronics by

Daniel Hart

23 Estimation of junction temperature and maximum power losses for device

Pandit Deendayal Petroleum University

School of Technology, Electrical Engineering Department

July-December 2015, Faculty- Mr. Vatsal Shah

Unit-I Power Semiconductor Devices

B. Tech, Semester V, EE-315 Power Electronics

Lesson Plan

1

Tentative

Date

Actual

Date

Lecture

NoContent Remarks

July-December 2015, Faculty- Mr. Vatsal Shah

B. Tech, Semester V, EE-315 Power Electronics

Lesson Plan

24 Single phase half wave uncontrolled rectifier: R and RL load

25 Porformance Parameters: Rectification efficiency, Form factor, Ripple Factor, Transformer Utilization Factor,

Displacement Factor, Harmonic Factor, Power Factor, Crest Factor, Total Harmonic Distortion

26 Single phase full wave uncontrolled rectifier: R and RL load. Calculation for filter capacitor value, Input

current waveshape

Power

Electronics by

Daniel Hart

27 Three phase half wave and full wave rectifier with R load, Principle of phase controlled converter operation:

Firing angle, Conduction angle & Extinction angle

28 Single phase half wave controlled rectifier: R and RL load, Effect of freewheeling diode

29 Single phase full wave controlled rectifier: R and RL load, Center Tap and Bridge confuguration, Gating

pulses

30 Half controlled bridge rectifier: symmetrical and asymmetrical configurations, Three phase half wave

controlled rectifier with R load

31 Three phase full wave controlled rectifier with R load, Four quadrant operation: Single phase dual converter,

Ideal dual converter and condition for firing angles

32 Principle of on-off control and phase angle control

33 Single phase bidirectional controller with resistive load, Single phase transformer connection changer

34Three phase full wave controllers: Analysis of three pahse three wire AC controller, Gating signals and RMS

voltage

35 Analysis of delta conneted three phase AC controller: Gating signals and RMS voltage

36 Single phase cycloconverter operation

37 Three phase-Three phase and Three phase-Single phase cycloconverters

38 DC-AC converter (Inverter) introduction, applications and principle of operation

39 Comparison of FM and PWM, Control of output voltage and frequecy in square wave mode of operation

40 Single phase half bridge inverter, Fourier analysis and output RMS voltage

41Performance parameters: HF, THD, DF and LOH, Single phase full bridge inverter operation with resistive

load

42 Voltage control of single phase inverter using PWM techniques: Single PWM and Multiple PWM

43 Sinusoidal PWM, Modified PWM and Phase Displacement control. Summary of modulation techniques

44Three phase Inverter operation: 180 degree and 120 degree conduction modes, Switching states of three

phase inverter

Unit III AC-AC Controllers

Unit IV DC-AC Converters

Unit-II AC-DC Converters

2