Paper format. National Exams, December 2013 — 07-Elec-B8 Power Electronics and Drives. Open-book, three hours, any non-communicating calculator permitted. Six problems are printed and any five constitute a complete paper; all are of equal value (20 points each). Because this set is a study resource, all six problems are solved in full below, every lettered sub-part included.
Reference texts for this subject
- M. H. Rashid, Power Electronics: Circuits, Devices and Applications, 4th ed. — inverters and PWM schemes (Ch. 6), dc–dc converters (Ch. 5), controlled rectifiers (Ch. 10), drives (Ch. 15).
- N. Mohan, T. M. Undeland and W. P. Robbins, Power Electronics: Converters, Applications and Design, 3rd ed. — switch-mode inverters and harmonic analysis (Ch. 8).
- S. J. Chapman, Electric Machinery Fundamentals, 5th ed. — synchronous machines (Ch. 5), induction machines (Ch. 7), dc machines (Ch. 8–9).
- B. K. Bose, Modern Power Electronics and AC Drives — constant volts-per-hertz induction-motor drives and PWM side effects.
- R. Krishnan, Electric Motor Drives: Modeling, Analysis and Control — converter-fed dc drives.
- C. W. Lander, Power Electronics, 3rd ed. — choppers and controlled rectifiers.
- J. J. Grainger and W. D. Stevenson, Power System Analysis — salient-pole power-angle equations and capability curves.
- IEEE Std 519 and CSA C22.1 (Canadian Electrical Code, Part I) — harmonic limits and harmonic-related conductor sizing in Canadian practice.
Check — two anomalies carried over from the printed paper. (i) Problem 6 is headed “December 2010” on the December 2013 question sheet and is solved here as printed. (ii) Problem 5 supplies a total leakage inductance of 1.25 mH but its accompanying formula describes $L_T$ as the total leakage reactance. The formula is dimensionally consistent only if $L_T$ is an inductance, so it is read as an inductance throughout, which is also what the numbers require.
