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Total No. of Questions : 08
Total No. of Pages : 01
M.Tech. (EE) EI-II (2018 Batch) (Sem.-1)
PWM CONVERTER AND APPLICATIONS
Subject Code : MTEE-104A-18
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M.Code: 75221
Time: 3 Hrs.
Max. Marks : 60
INSTRUCTIONS TO CANDIDATES :
- Attempt any FIVE questions out of EIGHT questions.
- Each question carries TWELVE marks.
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- What are major differences between voltage and current source converters? Explain the working of a current source converter using circuit diagram and corresponding waveforms.
- Classify different types of DC/AC converters. Draw neat circuit diagram of each type of these converters.
- Discuss in detail space vector based PWM technique for bridge converters.
- How a practical power electronic device behaves differently from that of ideal one? Explain how conduction losses are calculated in practical power electronic circuits?
- A 3-phase, Y-connected, 60 Hz, 4-pole induction motor has the following parameters: R1 = R2 = 0.0242 and X1 = X2 = 0.12 O. The motor is controlled by the variable frequency control with a constant (V/f) ratio. For an operating frequency of 12Hz, calculate the maximum torque as a ratio of its value at the rated frequency for both motoring and braking.
- Explain how current ripples are estimated in inverter fed drives?
- With the help of a neat circuit diagram explain how switching converters are used for reactive power compensation.
- Write short notes on :
- Multilevel inverters
- Bus clamping PWM
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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.
1| M-75221
(S35)-2215
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This download link is referred from the post: PTU M.Tech 1st Semester Last 10 Years 2010-2020 Previous Question Papers|| Punjab Technical University
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