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22-Elec-B8 Power Electronics and Drives: December 2017

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

  1. Question 1 Part 1 — twenty short-answer items on devices, converters and drives
  2. Question 2 Problem 1 — half-wave controlled rectifier with an R-L load
  3. Question 3 Problem 2 — single-phase a.c. voltage controller feeding a motor
  4. Question 4 Problem 3 — basic chopper, completing the load table
  5. Question 5 Problem 4 — current-source-inverter drive, torque and slip
  6. Question 6 Problem 5 — bridge-fed separately excited d.c. motor

Start with Question 1 →

Paper format. National Exams, December 2017 — 16-Elec-B8, Power Electronics and Drives. Open book, three hours, non-communicating calculator permitted. The paper is in two parts: Part 1 is twenty short-answer items (a) to (t) worth 2.5 points each, and Part 2 is five calculation problems worth 15 points each. The rubric says “attempt all parts” and that the maximum total score of 125 points includes a bonus of 25 points, so a candidate scoring 100 of the 125 available marks has a full paper. Every item and every sub-part is worked below.

Reference texts.