Download PTU B.Tech 2020 March EE 5th Sem Power Electronics Question Paper

Download PTU (I.K. Gujral Punjab Technical University Jalandhar (IKGPTU) ) BE/BTech EE (Electrical Engineering) 2020 March 5th Sem Power Electronics Previous Question Paper

1 | M-57026 (S2)-2732
Roll No. Total No. of Pages : 02
Total No. of Questions : 09
B.Tech. (EE) (Sem.?5)
POWER ELECTRONICS
Subject Code : EE-309
M.Code : 57026
Time : 3 Hrs. Max. Marks : 60
INSTRUCTIONS TO CANDIDATES :
1. SECTION-A is COMPULSORY consisting of TEN questions carrying TWO marks
each.
2. SECTION-B contains FIVE questions carrying FIVE marks each and students
have to attempt any FOUR questions.
3. SECTION-C contains THREE questions carrying TEN marks each and students
have to attempt any TWO questions.

SECTION-A
1. Write briefly :
a) What is TRIAC?
b) What is holding current?
c) What do you mean by dv/dt triggering?
d) What is load commutation?
e) What is the need of a chopper?
f) List the advantages and disadvantages of cycloconverters.
g) Discuss the need of an Inverter.
h) What do you mean by PWM control?
i) What do you mean by steady state analysis? Discuss.
j) Explain the importance of phase angle control.

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1 | M-57026 (S2)-2732
Roll No. Total No. of Pages : 02
Total No. of Questions : 09
B.Tech. (EE) (Sem.?5)
POWER ELECTRONICS
Subject Code : EE-309
M.Code : 57026
Time : 3 Hrs. Max. Marks : 60
INSTRUCTIONS TO CANDIDATES :
1. SECTION-A is COMPULSORY consisting of TEN questions carrying TWO marks
each.
2. SECTION-B contains FIVE questions carrying FIVE marks each and students
have to attempt any FOUR questions.
3. SECTION-C contains THREE questions carrying TEN marks each and students
have to attempt any TWO questions.

SECTION-A
1. Write briefly :
a) What is TRIAC?
b) What is holding current?
c) What do you mean by dv/dt triggering?
d) What is load commutation?
e) What is the need of a chopper?
f) List the advantages and disadvantages of cycloconverters.
g) Discuss the need of an Inverter.
h) What do you mean by PWM control?
i) What do you mean by steady state analysis? Discuss.
j) Explain the importance of phase angle control.

2 | M-57026 (S2)-2732
SECTION-B
2. Explain the operation of a SCR with the help of its static VI characteristics.
3. Explain the operation of a Single phase half wave controlled rectifier.
4. Describe the working of class D commutation with relevant diagrams.
5. Explain the reduction of harmonics in the inverter output voltage using PWM.
6. Explain the basic circuit and operation of a single-phase cycloconverter.

SECTION-C
7. Explain :
a) Series operation of SCR
b) Parallel operation of SCR
8. Explain :
a) Class B commutation
b) Two quadrant chopper
9. Discuss :
a) Series inverter
b) Dual Converter




NOTE : Disclosure of Identity by writing Mobile No. or Making of passing request on any
page of Answer Sheet will lead to UMC against the Student.
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