Efficiency of Ward Leonard method is ____________(a) Higher than rheostatic control method but lower than shunted field control method(b) Lower than rheostatic control method(c) Higher than rheostatic control method and shunted field control method(d) Depends on loadThis question was posed to me during an interview.My question comes from Ward Leonard Speed Control Method topic in section DC Motors of DC Machines

Efficiency of Ward Leonard method is ____________(a) Higher than rheos

1.	Efficiency of Ward Leonard method is ____________(a) Higher than rheostatic control method but lower than shunted field control method(b) Lower than rheostatic control method(c) Higher than rheostatic control method and shunted field control method(d) Depends on loadThis question was posed to me during an interview.My question comes from Ward Leonard Speed Control Method topic in section DC Motors of DC Machines
Answer» The correct option is (c) Higher than rheostatic control method and shunted field control method Best EXPLANATION: UNLIKE all other methods, external RESISTANCE is not added in the circuit of control system. Thus, efficiency of Ward Leonard control method is always highest at various different SPEEDS.

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