In: Electrical Engineering
(a) |
In DC motor, quadrant of operation can be defined by the
armature voltage and |
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(b) |
A chopper is used to control speed of 45.36 kW, 1750 rpm, 240 V,
189 A |
(i) |
Sketch the motor-drive circuit as mentioned above and label clearly. |
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(ii) |
Determine the chopper duty cycle during the motoring mode at
rated |
(8 marks) |
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(iii) |
If the motor is operated in braking mode, what happened to the
armature |