Please note — cover year vs approval: BTEUP's own file for this curriculum prints "YEAR 2025-2026" on its cover, while carrying the approval line "UPDATED AND APPROVED BY BOARD OF TECHNICAL EDUCATION U.P. LUCKNOW IN C.D.C MEETING HELD ON 16.07.2026" on every page. It is filed in BTEUP's 2026-27 folder (folder2627), so it is treated here as the 2026-27 syllabus on the strength of that approval. The scheme it carries is identical, subject for subject and mark for mark, to the 2025-26 scheme.
Fundamentals of Power Electronics — What This Subject Is About
Power electronics is what lets you control electricity itself — turning it on and off thousands of times a second to change its voltage, its frequency or its form. Fundamentals of Power Electronics teaches you to maintain the proper functioning of power electronic devices: SCRs, IGBTs, rectifiers, inverters and choppers. It is a practicum subject (L 2 – P 4) with 18 practicals — the most of any 4th-semester subject.
There are four units: power electronic devices, turn-on and turn-off methods of thyristors, phase-controlled rectifiers, and inverters, choppers, dual converters and cyclo-converters. The devices unit carries the most weightage at 30% (08 periods). There are 9 reference books.
Subject 4.3 (Practicum) • Total 100 Marks • 4 Credits • L 2 – P 4 • 4th Semester — Electrical Engineering • Session 2026–27
What You Will Study
Unit – I: Power Electronic Devices (08 Periods, 30%)
Definition – Scope and Applications; Power Electronic Switch Specifications: Power Diode, Power transistor, IGBT, GTO, DIAC, TRIAC; SCR – rating and their importance, Symbol, Circuit, Working, Characteristics, Protection and Applications - Battery charger using SCR, Emergency light system, Temperature controller using SCR; Working Principle of UJT.
Unit – II: Turn-on and Turn-off Methods of Thyristors (08 Periods, 26%)
SCR Turn-On methods: Voltage triggering, Thermal triggering, Illumination triggering, dv/dt triggering, Gate triggering; SCR triggering using UJT, PUT: Relaxation Oscillator and Synchronized UJT circuit; Pulse transformer and opto-coupler based triggering; Application: UPS and SMPS; SCR Turn-Off methods: Natural & Forced Commutations.
Unit – III: Phase Controlled Rectifiers (06 Periods, 22%)
Phase control: firing angle, conduction angle, extinction angle; Single phase half controlled, full controlled and midpoint-controlled rectifier with R, RL load: Circuit diagram, working, input-output waveforms, equations for DC output and effect of freewheeling diode; Different configurations of bridge-controlled rectifiers: Full-Wave & Half Wave.
Unit – IV: Inverters, Choppers, Dual Converters, Cyclo-converters (06 Periods, 22%)
Inverter: Introduction, working principles, voltage and current driven series and parallel inverters and applications; Choppers: Introduction, types of choppers and their working principles and applications; Dual converters: Introduction, working principles and applications; Cyclo-converters: Introduction, types, working principles and applications.
Practical Work
- Unit I — Identification & testing of SCR, TRIAC, DIAC, MOSFET and IGBT using a digital multimeter.
- Unit I — Obtain V-I characteristics of SCR.
- Unit I — Plot the V-I characteristics of IGBT and determine the break over voltage.
- Unit I — Plot the V-I characteristics of DIAC and determine the break over voltage.
- Unit I — Determine the latching current and holding current using V-I characteristics of SCR.
- Unit I — Plot the V-I characteristics of TRIAC and determine the break over voltage.
And more — the complete list of 18 practicals is inside the PDF.
Complete Syllabus
The full examination scheme, the complete practicals list and the reference books from the official syllabus. The unit-wise topics are in the "What You Will Study" section above.
Examination Scheme
| Code | Paper | Type | L – P | Credits | Internal | External | Total |
|---|---|---|---|---|---|---|---|
| 4.3 | Fundamentals of Power Electronics | Practicum | 2 – 4 | 4 | 60 | 40 (3 hrs) | 100 |
| Fundamentals of Power Electronics Total | 4 | 60 | 40 | 100 | |||
Units at a Glance
| Unit | Topic | Periods | Marks Share |
|---|---|---|---|
| I | Power Electronic Devices | 08 | 30% |
| II | Turn-on and Turn-off Methods of Thyristors | 08 | 26% |
| III | Phase Controlled Rectifiers | 06 | 22% |
| IV | Inverters, Choppers, Dual Converters, Cyclo-converters | 06 | 22% |
Complete Practicals List
This is the complete list of practicals from the official syllabus.
- Unit I — Identification & testing of SCR, TRIAC, DIAC, MOSFET and IGBT using a digital multimeter.
- Unit I — Obtain V-I characteristics of SCR.
- Unit I — Plot the V-I characteristics of IGBT and determine the break over voltage.
- Unit I — Plot the V-I characteristics of DIAC and determine the break over voltage.
- Unit I — Determine the latching current and holding current using V-I characteristics of SCR.
- Unit I — Plot the V-I characteristics of TRIAC and determine the break over voltage.
- Unit I — Illumination control / fan speed control through TRIAC.
- Unit II — Test the variation of R, C in R and RC triggering circuits on firing angle of SCR.
- Unit II — To Study UJT Triggering Techniques for Half Wave Controlled rectifiers.
- Unit II — To Study UJT Triggering Techniques for Full Wave Controlled rectifiers.
- Unit II — Perform the operation of Class – A, B, C, turn off circuits.
- Unit II — Perform the operation of Class – D, E, F turn off circuits.
- Unit III — Use CRO to observe the output waveform of half wave-controlled rectifier with resistive load and determine the load voltage.
- Unit III — Draw the output waveform of Full wave-controlled rectifier with R load, RL load, freewheeling diode and determine the load voltage.
- Unit III — Determine the firing angle using DIAC and TRIAC phase-controlled circuit on output power under different loads such as lamp, motor or heater.
- Unit IV — Test the performance of given SMPS, UPS.
- Unit IV — Performance Measurement and Analysis of DC-DC Buck Regulator.
- Unit IV — Performance Measurement and Analysis of DC-DC Boost Regulator.
Reference Books
As listed in the syllabus:
- Ramamoorty M., An Introduction to Thyristors and their applications, East-West Press Pvt. Ltd., New Delhi, ISBN: 8185336679
- Sugandhi, Rajendra Kumar & Sugandhi, Krishna Kumar, Thyristors: Theory and Applications, New Age International (P) ltd. Pub., New Delhi, ISBN: 978-0-85226-852-0
- Bhattacharya, S.K., Fundamentals of Power Electronics, Vikas Publishing House Pvt. Ltd. Noida. ISBN: 978-8125918530
- Jain & Alok, Power Electronics and its Applications, Penram International Publishing (India) Pvt. Ltd, Mumbai, ISBN: 978-8187972228
- Rashid, Muhammad, Power Electronics Circuits Devices and Applications, Pearson Education India, Noida, ISBN: 978-0133125900
- Singh, M. D. and Khanchandani, K.B., Power Electronics, Tata McGraw Hill Publishing Co. Ltd, New Delhi, 2008 ISBN: 9780070583894
- Zbar, Paul B., Industrial Electronics: A Text – Lab Manual, McGraw Hill Publishing Co. Ltd., New Delhi, ISBN: 978-0070728226
- Grafham D.R., SCR Manual, General Electric Co., ISBN: 978-0137967711
- Rahul Wadhawa, Industrial Electronics And Control, Asian Publishers, Muzaffarnagar. ISBN: 978-93-5502-131-1
Frequently Asked Questions
How many marks is Fundamentals of Power Electronics worth in the 4th semester?
100 marks, 4 credits. It is a practicum subject (L 2 – 4): internal 60, external 40 (3 hrs).
Which unit carries the most weightage in Fundamentals of Power Electronics?
Power Electronic Devices, 30% (08 periods).
How many practicals are there in Fundamentals of Power Electronics?
18 practicals — the complete list is in the Complete Syllabus section above, and in the PDF.
Which books should I read for Fundamentals of Power Electronics?
9 reference books are listed in the official syllabus — the full list is in the Complete Syllabus section above.
How can I download the Fundamentals of Power Electronics syllabus PDF?
The PDF is free to download — use the download link in the Download section below. It is prepared by KAMALDNP Academy from the official BTEUP syllabus.
How many practicals are there in Power Electronics?
18 practicals — from identifying and testing SCRs, TRIACs, DIACs, MOSFETs and IGBTs, to plotting their V-I characteristics, studying UJT triggering, observing rectifier waveforms on a CRO, and testing SMPS, UPS and DC-DC buck and boost regulators.
Related Syllabus Posts
- BTEUP Electrical 4th Semester Syllabus 2026-27
- Electrical Engineering Complete Syllabus 2026-27
- Electric Power Transmission and Distribution — BTEUP Electrical 4th Semester Syllabus 2026-27
- Electric Machine-2 — BTEUP Electrical 4th Semester Syllabus 2026-27
- Industrial Automation and Control — BTEUP Electrical 4th Semester Syllabus 2026-27
Download the Fundamentals of Power Electronics Syllabus PDF
Download the complete Fundamentals of Power Electronics syllabus PDF below — prepared by KAMALDNP Academy, with the full topic list, practicals and reference books.
Download the Fundamentals of Power Electronics Syllabus PDF
Source: BTEUP 2nd Year Electrical Engineering curriculum (folder2627). The file's cover prints "YEAR 2025-2026", but the approval line "UPDATED AND APPROVED BY BOARD OF TECHNICAL EDUCATION U.P. LUCKNOW IN C.D.C MEETING HELD ON 16.07.2026" appears on every page (95 times), and the file is treated here as the 2026-27 syllabus on the strength of that approval. Topic lists follow the official syllabus; short explanations are the author's own plain-English summaries, not syllabus text. Please confirm with your own polytechnic for any local changes.
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