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EX-801 RGPV B.Tech

Electrical Drives (ED)

Previous year papers and the official syllabus are free to read, no account needed.

Previous Year Papers

4 papers, latest Jun 2025

Free
See all 4 papers

Syllabus, notes and important questions for EX-801

Syllabus units

Topics as the official RGPV syllabus lists them.

Unit 1 Basic Concepts of Electric Drives 13 topics
  • Elements of drive systems
  • Requirement of electric drives
  • Rating \& selection of drives
  • Groups and individual drives
  • Constant power and constant torque drives
  • Motor mechanism dynamics
  • Review of characteristics of AC \& DC motors
  • Load characteristic
  • Load‑drive speed‑torque characteristics
  • Quadrant speed‑torque characteristics
  • Mechanical systems stability of electric drives
  • Referred moment of inertia and torque of motor‑load combination
  • Load equalization
Unit 1 notes
Unit 2 DC Drives 5 topics
  • Starting \& braking of conventional drives
  • Phase‑controlled drives
  • Chopper‑controlled drives
  • Transient and steady‑state analysis
  • Energy recovery systems
Unit 2 notes
Unit 3 Induction Motor Drives 9 topics
  • Conventional method of starting, braking and speed control for induction motors
  • PWM control
  • Voltage‑Source Inverter (VSI) fed induction motor drives
  • Current‑Source Inverter (CSI) fed induction motor drives
  • Cyclo‑converter fed drive
  • Vector‑control drives
  • Slip‑controlled induction motor drives
  • Review of conventional methods and converter‑controlled Crammers \& Scherbius drives
  • Rotor‑impedance control
Unit 3 notes
Unit 4 Synchronous Motor Drives 4 topics
  • VSI fed synchronous motor drives
  • CSI fed synchronous motor drives
  • Self‑controlled brushless and commutatorless DC motor drives
  • Self‑controlled brushless and commutatorless AC motor drives
Unit 4 notes
Unit 5 Special Drives 6 topics
  • Fundamentals of switched‑reluctance motors
  • Stepper motors
  • Permanent‑magnet motor fundamentals
  • Introduction to vector control for permanent‑magnet motors
  • Digital control of drives
  • Case studies: electric traction, steel & cement plants, textile & paper mills, machine‑tool drive and CNC, electric cars
Unit 5 notes
Read the full syllabus

Exam insights

Counted from 4 past EX-801 papers.

Marks asked per paper, by unit

  • Unit 1 Basic Concepts of Electric Drives 38 marks
  • Unit 2 DC Drives 14 marks
  • Unit 3 Induction Motor Drives 26 marks
  • Unit 4 Synchronous Motors Drives 14 marks
  • Unit 5 Special Drives 19 marks

Average marks of the questions from each unit in one paper. You answer only some of them, so the total is more than the paper’s maximum.

Asked again and again

  1. Explain the construction, principle of working and fundamentals of switched reluctance motor with neat diagram.

    Asked 3 times: 2025, 2023, 2022

  2. Explain digital control of electric drives with a block diagram.

    Asked 3 times: 2024, 2023, 2022

  3. Explain V/f (variable frequency) control of three-phase induction motor with diagram, including why V/f is kept constant below base speed and voltage is kept constant above base speed, and range of speed control.

    Asked 2 times: 2025, 2024

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