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22-Elec-B8 Power Electronics and Drives: December 2014

Nivaar worked solution (AI-drafted; not reviewed by a licensed engineer)

  1. Question 1 A.C. Voltage Controller Feeding an Inductive Motor Load
  2. Question 2 Controlled Half-Wave Rectifier with a Back-EMF Load
  3. Question 3 Single-Pulse-Modulation Inverter — Harmonic Content and Load Currents
  4. Question 4 Basic DC Chopper — Ripple Ratio and Time-Domain Currents
  5. Question 5 Constant Volts-per-Hertz Induction Motor Drive
  6. Question 6 Three-Phase Bridge-Fed Separately Excited DC Drive

Start with Question 1 →

Paper format. National Exams, December 2014 — 07-Elec-B8 Power Electronics and Drives. Open Book, 3 hours. Six problems, all of equal value (20 marks each); the rubric states that any five constitute a complete paper and only the first five presented are marked. All six are solved below, in full and including every sub-part, because the set is a study resource rather than an examination script.

Reference texts. M. H. Rashid, Power Electronics: Circuits, Devices and Applications, 4th ed. (primary EGBC reference for this code); N. Mohan, T. M. Undeland and W. P. Robbins, Power Electronics: Converters, Applications and Design, 3rd ed.; C. W. Lander, Power Electronics, 3rd ed.; B. K. Bose, Modern Power Electronics and AC Drives; R. Krishnan, Electric Motor Drives: Modeling, Analysis and Control. Angles are in degrees unless a formula requires radians, and every conduction integral below is written over the real conduction window rather than over an assumed half cycle.