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Ward Leonard method is an ideal choice for motor which undergoes frequent starting, stopping, speed reversal.

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Ward Leonard method is an ideal choice for motor which undergoes frequent starting, stopping, speed reversal.

(a) True

(b) False

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

This interesting question is from Ward Leonard Speed Control Method in division DC Motors of DC Machines

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The correct option is (a) True

For explanation: Absence of external resistance increases efficiency. Also, when the generator emf becomes less than the back emf of the motor, electrical power flows back from motor to generator, is converted to mechanical form and is returned to the mains via the driving ac motor. This aspect makes Ward Leonard method perfect for given application.

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