. Two similar coupled machines of same rating, each having an armature resistance of 0.5 Ω...
. Two similar coupled machines of same rating, each having an armature resistance of 0.5 Ω are connected for Hopkinson’s test. Test data recorded as follows: Supply voltage = 230 Volts Total line current drawn from the supply = 8 A Field current of the machine running as generator = 3 A Field current of the machine running as motor = 2 A Generator armature current = 17 A
(i) Estimate the rotational loss of each machine.
(ii) Estimate the efficiency of the generator.
(iii) Estimate the efficiency of the motor.
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. Two similar coupled machines of same rating, each having an
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