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

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

(a) Reduce armature voltage

(b) Increase armature voltage

(c) Increase field current

(d) Decrease field current

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The query is from Ward Leonard Speed Control Method in division DC Motors of DC Machines

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Correct answer is (d) Decrease field current

The best explanation: In Ward Leonard speed control method, speed can be increased above base value by weakening of the field, which can be done by lowering field current value. By increasing armature voltage speed can be increased but this is not employed in Ward Leonard method.

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