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| Roll No. | Total No. of Pages : 02 | Total No. of Questions : 09 |
B.Tech.(ECE/ETE) (E-I 2011 Onwards) (Sem.-6)
INDUSTRIAL ELECTRONICS
Subject Code : BTEC-903
M.Code: 71232
Time: 3 Hrs.
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Max. Marks : 60
INSTRUCTIONS TO CANDIDATES :
- SECTION-A is COMPULSORY consisting of TEN questions carrying TWO marks each.
- SECTION-B contains FIVE questions carrying FIVE marks each and students have to attempt any FOUR questions.
- SECTION-C contains THREE questions carrying TEN marks each and students have to attempt any TWO questions.
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SECTION-A
- Answer briefly :
- List various Chopper commutation methods.
- What is form factor in case of half wave rectifier?
- What is intrinsic standoff ratio? Also, give its range.
- What is significance of duty cycle in case of choppers?
- Differentiate voltage and current driven inverters.
- Give applications of cycloconverter.
- How can an UJT used for triggering of an SCR?
- How firing angle effects the output voltage of converter?
- What is commutator-less dc motor control?
- How Power MOSFET differs from simple MOSFET?
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1| M-71232 (S2)-1991
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SECTION-B
- What do you mean by closed loop control? How can it be used in speed control of motors?
- Explain the two-transistor model of thyristor with suitable diagram.
- Draw and explain the circuit of a parallel inverter.
- What is the need of series and parallel connection of SCR? Explain the series connections of SCRs.
- Discuss any three harmonic reduction techniques in PWM.
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SECTION-C
- Explain any four techniques to turn-on the thyristor.
- Explain the circuit of a single-phase full wave converter with RL load and with freewheeling diode. Draw the waveforms at the output and across the diodes.
- What do you mean by AC voltage controller? Explain sequence control of AC voltage in case of single phase voltage controller.
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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.
2| M-71232 (S2)-1991
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This download link is referred from the post: PTU B.Tech 6th Semester Last 10 Years 2009-2019 Previous Question Papers|| Punjab Technical University
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