In a Field’s test on two 230-V, 1.492 kW mechanically-coupled similar series motors, the following figures were obtained

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answerhappygod
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In a Field’s test on two 230-V, 1.492 kW mechanically-coupled similar series motors, the following figures were obtained

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In a Field’s test on two 230-V, 1.492 kW mechanically-coupled
similar series motors, the following figures were obtained. Each
has armature and compole winding resistance of 2.4 Ω, series field
resistance of 1.45 Ω and total brush drop of 2 V. The p.d. across
armature and field was 230 V with a motor current of 10.1 A. The
generator supplied a current of 8.9 A at a terminal p.d. of 161 V.
Calculate the efficiency and output of the motor for this load.
[76.45%, 1.775 kW]
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