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

1997 Course Advanced Power Electronics

3 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] P1359 [Total No. of Pages : 3 [3864]-30 B.E. (E & TC) ADVANCE POWER ELECTRONICS (1997 Course) (404185) Time : 3 Hours] [Max. Marks : 100 Instructions to the candidates: 1) Answer any three questions from each section. 2) Answers to the two sections should be written in separate books. 3) Neat diagrams must be drawn wherever necessary. 4) Figures to the right indicate full marks. 5) Your answers will be valued as a whole. 6) Use of logarithmic tables, slide rule, Mollier charts, electronic pocket calculator and steam tables is allowed. 7) Assume suitable data, if necessary. SECTION - I Q1) a) b) c) Q2) a) b) Q3) a) b) c) What are phase controlled converters? Explain with circuit diagram & W/F S, working of 3 semiconverter with R-load. Deduce the equation for o/p voltage. [10] Justify why p.f is poor in FCC compared to HCC. [3] What is the effect of Ls on converter o/p? Explain. [3] What are inverters? Explain with circuit diagram & W/F S working of 3 VSI with 180 conduction mode feeding star connected resistive load. [10] Why PWM inverters are preferred over sq.wave & quass-sq.wave inverters? Justify. [6] What are resonant converters? Explain with circuit diagram & W/F S working of ZVS resonant converter. [8] Compare linear, switched mode & resonant converters. [4] What is SMPS? Explain in brief. [4] P.T.O. Q4) Write short notes on any three : a) UPS. b) MI/EMC. c) ZCS. d) Harmonic ellimination technique. e) ASCSI (3 ). Q5) a) b) [18] Explain with circuit diagram & W/F S working of 1 Half controlled converter bridge with RL-load. [8] Explain with circuit diagram & W/F S working of triac based power controller ckt with applications. [8] SECTION - II Q6) a) b) c) Q7) a) b) Q8) a) b) What are DC motor performance parameters? Explain in brief. Explain with circuit diagram & W/F S, working of single phase controlled converter with highly inductive load. What is regenerative braking in DC motors? Explain. [4] full [8] [4] What are dual converters? Explain with circuit diagram & W/F S, working of 1 dual converter operating with highly inductive load. Derive equation for (icr) circulating current. [10] Compare Circulating & non-circulating mode converter. [6] What are DC- to DC converters? Explain with circuit diagram & W/F S, working of 2 Q-step-down chopper operating with RL-load.[10] Justify, why choppers are preferred over phase controlled converters for power control application. [6] Q9) a) What are AC-drives? Explain with block diagram speed control technique b) of 1 I.M by using V method. Comment on Tq & speed characteristics. f [10] Explain braking mechanisms in I.M. [6] [3864]-30 2 Q10)Write short notes on (any three) : [18] a) Brushless DC motor. b) Stepper motor drive. c) DC current sensing & speed measurement techniques. d) Reversible drives (chopper based). e) Protection circuits for DC/AC motors. vvvv [3864]-30 3

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: