
	Trending ▼ ICSE CBSE 10th ISC CBSE 12th CTET GATE UGC NET Vestibulares ResFinder

1997 Course Advanced Power Electronics

2 pages, 29 questions, 0 questions with responses, 0 total responses,

	pune_eng	+Fave Message
	Profile Timeline Uploads Q & A

Home > pune_eng >

Instantly get Model Answers to questions on this ResPaper. Try now!
NEW ResPaper Exclusive!

Formatting page ...

Total No. of Questions : 10] P1410 [Total No. of Pages : 2 [3664]-29 B.E. (E & TC) ADVANCE POWER ELECTRONICS (1997 Course) Time : 3 Hours] [Max. Marks : 100 Instructions to the candidates: 1) 2) 3) 4) 5) Answer three questions from Section I and three questions from Section II. Answers to the two sections should be written in separate books. Neat diagrams must be drawn wherever necessary. Figures to the right indicate full marks. Assume suitable data, if necessary. SECTION - I Q1) a) What are converters? Explain with neat circuit diagram & waveforms working of 3 semi converter with resistive load. Deduce the equation for O/P voltage & O/P unit. [10] b) What is overlap angle? Explain in brief. [4] c) What is free wheeling? Explain. [4] Q2) a) What are Inverters? Explain with neat circuit diagram & waveforms working of 3 VSI with 180 made conduction with balanced R-load.[10] b) What are PWM Inverters? Explain any one type. [6] Q3) a) What are resonant converters? Explain the operation of Zero Voltage Switching (ZVS) resonant dc-dc converter with the help of equivalent diagrams & waveforms. [10] b) Compare Linear, switched mode & resonant converters. Q4) a) What is SMPS? Explain with circuit diagram. b) Explain the need of feedback diodes in Inverters. [6] [6] [4] c) What is power factor? Explain any one method of improving power factor with suitable diagram. [6] P.T.O. Q5) Write short notes (Any three) : a) Flyback converter. [16] b) EMI/EMC. c) Effect of Source Inductance on Converter output. d) PWM Elimination techniques. e) Zero count switching. SECTION - II Q6) a) What are dual converters? Explain with circuit diagram & waveforms working of 1 Full controlled dual converter with circulating mode. Deduce the equation for circulating unit. [10] b) Justify why choppers are preferred over dual converters. [6] Q7) a) What are dc drives? Explain with neat circuit diagram & waveforms working of Full controlled converter with motor load. [10] b) What is Regenerative braking? Explain in brief. [3] c) What is plugging. [3] Q8) a) What are choppers? Explain with circuit diagram & waveforms working [10] of step-up-chopper. b) Unipolar & Bipolar modulation in choppers. [6] Q9) a) What is Induction Motor? Explain with circuit diagram, speed control technique of 3 I.M by using v/f Method. Comment on Tq, slip characteristics & power. [10] b) What is slip-power recovery? Explain in brief. Q10) Write short notes on (Any three) : a) Brushless DC Motor. [18] b) Stepper Motor. c) UPS. d) Switching Regulator LM 305 e) 4Q-choppers. [3664]-29 [6] 2

Formatting page ...

Tags : Pune, Engineering, University of Pune, Engineering question papers, Pune University, previous year question papers, question papers, india, model question paper, pune university paper pattern, pune university syllabus, old question papers

pune_eng chat

Horizontal lines at:
Guest Horizontal lines at:
AutoRM Data:
Box geometries: