Gujarat Technological University 2011-6th Sem B.E , 160902 - Power Electronics-II on - Question Paper
GUJARAT TECHNOLOGICAL UNIVERSITY
B E Sem-VI exam May 2011
Subject code: 160902 Subject Name: Power Electronics-I
Date:17/05/2011 Time: 10.30 am – 01.00 pm
Total Marks: 70
Seat No. Enrolment No.
GUJARAT TECHNOLOGICAL UNIVERSITY
B E Sem-VI Examination May 2011
Subject code: 160902 Subject Name: Power Electronics-II
Date:17/05/2011 Time: 10.30 am - 01.00 pm
Total Marks: 70
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
Q.1 (a) Explain half bride and full bridge topology of inverter. 07
(b) Explain 3 phase inverter operation for 1800 . 07
Q.2 (a) Give comparison between current source inverter and voltage source 07 inverter.
(b) What is PWM? Explain SPWM techniques. 07
(b) Explain space vector pulse modulation techniques. 07
Q.3 (a) Explain inverter operation for 1200 . 07
(b) Explain basic principle of cyclo- converter with circuit diagram and 07 wave from?
Q.3 (a) Explain three phase to single phase cycloconvrter. 07
(b) Explain the basics of Matrix converter. 07
(a) Give the comparison between On/Off control and phase control of A.C voltage controller.
Q.4
07
07
07
07
07
(b) Explain full wave controller with R-L load. Draw the necessary wave-form.
(a) Explain slip-power recovery by Static Scherbius method for speed control of induction motor.
Q. 4
Q.5
(b) Explain application of converter in HVDC transmission.
(a) Explain V/f control of induction motor drives? Give its merits and demerits.
(b) Explain the method of rotor resistance control using static device for 07 wound rotor motor.
(a) Explain the stator voltage control of induction motor drives. 07
(b) Explain McMurray inverter with each mode of operation. Give its 07 limitation.
Q.5
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| Earning: Approval pending. |
