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## GUJARAT TECHNOLOGICAL UNIVERSITY

## Program Name: Diploma Engineering

## Level: Diploma

## Branch: Electrical Engineering / Renewable Energy

Subject Code: DI05000171

Subject Name: Power Electronics Converters

w. e. f. Academic Year:

2026-27

Semester:

5 th

Category of the Course:

PCC

Prerequisite:

Basic knowledge of electrical circuits, electronic devices (diodes, transistors), and fundamentals of AC/DC systems.

Rationale:

Power Electronics Converters is a core subject that deals with efficient conversion and control of electrical power using semiconductor devices. It provides knowledge of various converters such as rectifiers, choppers, and inverters, which are widely used in industrial and domestic applications. The subject helps students understand switching techniques, control methods, and performance parameters of power  electronic  systems.  It  also  introduces  modern  devices  like  MOSFETs, IGBTs,  and  wide  band  gap  materials  used  in  high-efficiency  applications.  The concepts  learned  are  essential  for  applications  such  as  motor  drives,  renewable energy systems, UPS, SMPS, and electric vehicle chargers. This subject builds a strong  foundation  for  design,  analysis,  and  troubleshooting  of  power  electronic circuits. It also enhances  practical  and  industry-oriented  skills required  for electrical engineering professionals.

## Course Outcome:

After Completion of the Course, Student will able to:

|   No | Course Outcomes                                                                                                | RBT Level   |
|------|----------------------------------------------------------------------------------------------------------------|-------------|
|   01 | Understand  and  explain  the  operation,  characteristics,  and  selection  of  power  semiconductor devices. | R           |
|   02 | Analyze  the  working  and  performance  of  single-phase  and  three-phase  line- commutated converters.      | U           |
|   03 | Apply steady-state principles to design and evaluate DC-DC converters.                                         | A           |
|   04 | Explain the operation and control of single-phase and three-phase inverters.                                   | U           |
|   05 | Demonstrate knowledge of practical power electronics applications.                                             | A           |

*Revised Bloom's Taxonomy (RBT)

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## GUJARAT TECHNOLOGICAL UNIVERSITY

Program Name: Diploma Engineering Level: Diploma Branch: Electrical Engineering / Renewable Energy Subject Code: DI05000171 Subject Name: Power Electronics Converters

## Teaching and Examination Scheme:

| Teaching Scheme  (in Hours)   | Teaching Scheme  (in Hours)   | Teaching Scheme  (in Hours)   | Total Credits  L+T+ (PR/2)   | Total Credits  L+T+ (PR/2)   | Assessment Pattern and Marks   | Assessment Pattern and Marks   | Assessment Pattern and Marks   | Total   Marks   |
|-------------------------------|-------------------------------|-------------------------------|------------------------------|------------------------------|--------------------------------|--------------------------------|--------------------------------|-----------------|
| L                             | T                             | PR                            | C                            | Theory                       | Theory                         | Tutorial / Practical           | Tutorial / Practical           |                 |
| L                             | T                             | PR                            | C                            | ESE (E)                      | PA(M)                          | PA(I)                          | ESE (V)                        |                 |
| 3                             | 0                             | 2                             | 4                            | 70                           | 30                             | 30                             | 20                             | 150             |

## Course Content:

|   Unit  No. | Content                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |   No. of  Hours | % of  Weightage   |
|-------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|-----------------|-------------------|
|           1 | Power Semiconductor Devices & Driver circuits  Contents:    Structure,  working  and  static  characteristics  of  MOSFET,  IGBT, SCR, Concept of wide band gap (WBG) semiconductor  materials: GaN, SiC.    Realization of ideal and practical power electronics switches   Protection  of  power  semiconductor  devices  (Over  voltage,  short circuit current, dv/dt, di/dt etc.), cooling & heatsink for  power semiconductor devices, Design of Snubber circuit   Commutation of SCR   Gate  &  Base  Driver  circuits:  requirements  and  preliminary  design considerations, Driver circuit with transformer isolation  and opto isolation with examples.   Function of freewheel diode.   Ratings  and  interpretation  of  datasheet  of  power  semiconductor devices   Basics of Harmonics & its effects on performance |              12 | 27%               |
|           2 | Line Commutated Converters  Contents:   Single phase half wave& full wave bridge rectifier with R, RL  and RLE load   Working Principle and Analysis of Three phase half wave and  full wave uncontrolled rectifierwith RLoad.    Single phase full wavecontrolled rectifier with R & RL load                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |              10 | 22 %              |

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## GUJARAT TECHNOLOGICAL UNIVERSITY

Program Name: Diploma Engineering Level: Diploma Branch: Electrical Engineering / Renewable Energy Subject Code: DI05000171 Subject Name: Power Electronics Converters

|    | and its examples   Principle of AC voltage controller: Integral cycle control and  Phase control    Single phase Integral control and Phase control AC Voltage  controller with R load.                                                                                                                                                                                                                                                                                                                              |    |      |
|----|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|----|------|
|  3 | DC - DCSwitched Mode Converters  Contents:    Chopper: Block schematic, SPDT representation & realization  using semiconductor switches   DC steady state principles: volt-sec balance, amp-sec balance   Design of Buck, Boost and Buck-Boost converters: Topology,  Working, modes of operation, Derivation of L and C and its  examples   Selection of Power switches: Device selection, Electrical stress  rating, Thermal stress rating   Isolated DC - DC converters: Forward converter, Flyback  converter | 08 | 18 % |
|  4 | INVERTERS  Contents:    Basic working principle of Inverter   Terminology: HF, THD, DF, LOH etc.   Working & Design of single-phasehalf bridge and full bridge  voltage source inverters with R & RL load with examples   Voltage control in single phase inverters: single pulse, multiple  pulse and Sinusoidal PWM control   Unipolar  and  Bipolar  PWM  switching  techniques  on  single  phase full bridge inverters   Construction and working of three phase inverters: 120˚ mode  and 180˚ mode.       | 10 | 22 % |
|  5 | Power Electronics Applications  Contents:   Soft starter of three phase induction motors   Variable voltage Variable frequency control of three phase I.M.    Electronics fan regulator, Induction heaters, UPS, SMPS   Simple battery charger & automatic battery charger    EV car charger                                                                                                                                                                                                                      | 05 | 11 % |

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## GUJARAT TECHNOLOGICAL UNIVERSITY

## Program Name: Diploma Engineering

## Level: Diploma

## Branch: Electrical Engineering / Renewable Energy

Subject Code: DI05000171

Subject Name: Power Electronics Converters

|  Active power factor correction (APFC) using TSC   |    |     |
|-----------------------------------------------------|----|-----|
| Total                                               | 45 | 100 |

## Suggested Specification Table with Marks (Theory):

## Distribution of Theory Marks (in %)

| R Level   | U Level   | A Level   | N Level   | E Level   | C Level   |
|-----------|-----------|-----------|-----------|-----------|-----------|
| 25 %      | 35 %      | 40 %      | -         | -         | -         |

Where R: Remember; U: Understanding; A: Application, N: Analyze and E: Evaluate C: Create (as per Revised Bloom's Taxonomy)

## References/Suggested Learning Resources:

## (a) Books:

1. Power Electronics - Dr. P.S. Bimbhra, Edition: Fifth Edition (2012), ISBN: 978-8131724668, Publisher: Khanna Publishers
2. Power Electronics: Essentials &amp; Applications - L. Umanand, Edition: First Edition (2009), ISBN: 978-8126521837, Publisher: Wiley India
3. Power Electronics: Converters, Applications and Design - Ned Mohan, Tore M. Undeland, William P. Robbins, Edition: Third Edition (2003), ISBN: 978-0471226932, Publisher: Wiley
4. Power Electronics:  Circuits,  Devices  and  Applications -  Muhammad  H.  Rashid,  Edition: Third Edition (2004), ISBN: 978-0131011403, Publisher: Pearson Education
5. Power Electronics Handbook - Issa Batarseh, Ahmad Harb, Edition: Second Edition (2018), ISBN: 978-0128114070, Publisher: Academic Press
6. Fundamentals  of  Power  Electronics -  Robert  W.  Erickson,  Dragan  Maksimovic,  Edition: Second Edition (2001), ISBN: 978-0792372707, Publisher: Springer

## (b) Open-source software and website:

-  https://nptel.ac.in/courses/108108036
-  https://nptel.ac.in/courses/108101126
-  https://www.allaboutcircuits.com/video-lectures/
-  https://www.ieee-pels.org/
-  https://www.coursera.org/learn/power-electronics
-  https://vilab.co.in/

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## GUJARAT TECHNOLOGICAL UNIVERSITY

## Program Name: Diploma Engineering

## Level: Diploma

## Branch: Electrical Engineering / Renewable Energy

Subject Code: DI05000171

Subject Name: Power Electronics Converters

## Suggested Course Practical List:

|   Sr.  No. | Practical Outcome/Title of Experiment                                                                        | CO1   | CO2   | CO3   | CO4   | CO5   |
|------------|--------------------------------------------------------------------------------------------------------------|-------|-------|-------|-------|-------|
|          1 | Build  circuit  on  breadboard  /  PCB  &  test  gate  drive  circuit MOSFET / IGBT (Any one method)         | √     |       |       |       |       |
|          2 | To Perform different triggering circuit of SCR (R, RC  and UJT) and observe waveform on DSO                  | √     |       |       |       |       |
|          3 | To  perform  and  plot  static  characteristics  of  SCR  /  MOSFET / IGBT.                                  | √     |       |       |       |       |
|          4 | Wire  the  three-phase  half  wave  &  full  wave  uncontrolled rectifier & test the performance             |       | √     |       |       |       |
|          4 | Simulate  three  phase  half  wave  and  full  wave  uncontrolled rectifier.                                 |       | √     |       |       |       |
|          5 | Simulate  single  phase-controlled  rectifier  with  RL  load and freewheel diode at different firing angle. |       | √     |       |       |       |
|          6 | To perform single phase-controlled rectifier with RL  load and freewheel diode at different firing angle.    |       | √     |       |       |       |
|          7 | To perform single phase AC voltage controller using  SCR / Triac with R and RL load                          |       | √     |       |       |       |
|          8 | Build circuit on breadboard / PCB & test performance  of Buck converter on DSO.                              |       |       | √     |       |       |
|          9 | Build circuit on breadboard / PCB & test performance  of Boost converter on DSO.                             |       |       | √     |       |       |
|         10 | Build circuit on breadboard / PCB & test performance  of Buck - Boost converter on DSO.                      |       |       | √     |       |       |
|         11 | Build circuit on breadboard / PCB & test performance  of single-phase inverter circuit.                      |       |       |       | √     |       |
|         12 | Perform /  Simulate  single  phase  half  and  full  bridge  inverter circuit.                               |       |       |       | √     |       |
|         13 | Simulate  single  pulse,  multiple  pulse  &  Sinusoidal  PWM voltage control of single-phase inverter.      |       |       |       | √     |       |
|         14 | Perform /  Simulate  three  phase  inverter  operation  of  mode 120 degree and 180 degree.                  |       |       |       | √     |       |
|         15 | To Perform  DC Motor  speed  control  using  Chopper  circuit.                                               |       |       |       |       | √     |
|         16 | To  Perform  speed  control  of  three  phase  induction  motor by V/F control method.                       |       |       |       |       | √     |

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## GUJARAT TECHNOLOGICAL UNIVERSITY

Program Name: Diploma Engineering Level: Diploma Branch: Electrical Engineering / Renewable Energy Subject Code: DI05000171 Subject Name: Power Electronics Converters

## List of Laboratory/Learning Resources Required:

| Sr.  No.                                                              | Equipment Name with Broad Specifications                                                                                                                               |
|-----------------------------------------------------------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| 1                                                                     | Buck, Boost and Buck-Boost DC-DC Converter practical trainer kit.                                                                                                      |
|                                                                       | 2  Single-phase half bridge and full bridge inverter trainer kit with R and RL load,  capable of generating square wave, quasi-square wave, and multi-pulse waveforms. |
| 3                                                                     | Single-phase controlled rectifier trainer kit with firing angle variation facility.                                                                                    |
| 4                                                                     | Power semiconductor device characteristic kits for MOSFET, IGBT, and SCR.                                                                                              |
| Three-phase inverter trainer kit with 120° and 180° conduction modes. | 5                                                                                                                                                                      |
| Single-phase AC voltage controller trainer kit.                       | 6                                                                                                                                                                      |
| methods).                                                             | 7  Various types of SCR triggering circuit kits (R, RC, UJT, and pulse triggering                                                                                      |

## Suggested Project List:

1. Design and development of isolated MOSFET gate driver circuit using opto-coupler.
2. Design and fabrication of gate driver circuit using pulse transformer isolation.
3. PCB design and implementation of single-phase bridge rectifier with filter circuit.
4. Design and implementation of DC-DC Buck converter for voltage regulation.
5. Design and implementation of Boost converter for step-up voltage application.
6. Single-phase inverter using MOSFET/IGBT for AC load.
7. Design of simple UPS system for low power applications.
8. EV battery charger (basic model) using controlled rectifier.

## Suggested Activities for Students:

Other than the classroom and laboratory learning, following are the suggested student-related co-curricular activities which can be undertaken to accelerate the attainment of the various outcomes in this course. Students should perform following activities in group (or individual) and prepare reports of about 5 pages for each activity. They should also collect/record physical evidence for their (student's) portfolio which may be useful for their placement interviews:

1. Prepare charts/models of different power semiconductor devices and their characteristics.

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## GUJARAT TECHNOLOGICAL UNIVERSITY

## Program Name: Diploma Engineering

## Level: Diploma

## Branch: Electrical Engineering / Renewable Energy

Subject Code: DI05000171

Subject Name: Power Electronics Converters

2. Collect and study datasheets of MOSFET, IGBT, and SCR and present key parameters.
3. Perform simulation of rectifier, chopper, and inverter circuits using LTspice/Scilab.
4. Identify power electronics applications used in home appliances and industry.
5. Visit nearby industry or workshop to observe power electronic equipment (drives, UPS, chargers).
6. Prepare presentation on protection techniques and cooling methods of power devices.
7. Study and compare different PWM techniques used in inverters.

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