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A 230 V, 1800 rpm, long shunt, cumulative compound motor has a shunt field resistance of 460 Ω, series field resistance of 0.2 Ω and armature circuit resistance of 1.3 Ω. The full-load line current is 10.5 A. The rotational loss is 5% of the power developed. Then the efficiency (in percentage) of the motor at full load is________.84.57 |
Answer» A 230 V, 1800 rpm, long shunt, cumulative compound motor has a shunt field resistance of 460 Ω, series field resistance of 0.2 Ω and armature circuit resistance of 1.3 Ω. The full-load line current is 10.5 A. The rotational loss is 5% of the power developed. Then the efficiency (in percentage) of the motor at full load is________.
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