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1) Describe the multi quadrant operation of the low speed hoist within speed torque plane in detail.

2) Deduce the expression for heating time constant and sketch the cooling and heating curves.

3) Describe the operation of single phase fully-controlled converter fed dc separately excited motor in continuous and discontinuous modes of operation with necessary waveforms.

4) a) Describe the several control techniques of the chopper controlled DC Drives.

b) Also describe what is meant by the Ward Leonard scheme.

5 ) Describe the static Kramer variable speed drive system used for slip power recovery with neat sketch.

6) Describe the method of control of 3- phase induction motor by

a) Stator voltage control

b) Frequency control

7) Describe cyclo- converter fed synchronous motor drive with neat diagram. describe in detail.

8) Describe the self-controlled synchronous motor drive by using the load commutated thyristor inverter.

9) Describe the control scheme for steel rolling mills with suitable diagram.

10) Sketch the appropriate diagram and discuss the DSP based control of the electric drive.

Electrical & Electronics, Engineering

  • Category:- Electrical & Electronics
  • Reference No.:- M913204

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