The speed of a separately excited dc motor is controlled below base speed by using a type-A SCR based chopper. The supply voltage is 220 V dc and the armature resistance is 0.5 Ω. Calculate the minimum value of firing angle if the motor drives a constant torque load requiring an average armature current of 30 A. - Study24x7
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Karan Singh
19 Jun 2023 01:32 PM study24x7 study24x7

 The speed of a separately excited dc motor is controlled below base speed by using a type-A SCR based chopper. The supply voltage is 220 V dc and the armature resistance is 0.5 Ω. Calculate the minimum value of firing angle if the motor drives a constant torque load requi...

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A

1/2

B

3/44

C

59/46

D

7/12

IIT-JEE Sciences
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