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In Ward Leonard speed control method for lowering the speed of the motor ______________

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In Ward Leonard speed control method for lowering the speed of the motor ______________

(a) Reduce armature voltage

(b) Increase armature voltage

(c) Increase field current

(d) Decrease field current

I have been asked this question in an international level competition.

My question is from Ward Leonard Speed Control Method topic in chapter DC Motors of DC Machines

1 Answer

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Best answer
The correct choice is (a) Reduce armature voltage

The best explanation: In Ward Leonard speed control method, speed can be reduced under base value by reducing armature voltage. By increasing field current speed can be reduced but this is not employed in Ward Leonard method.

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