1. A six-pole, three-phase, 440-V, 60-Hz induction motor has the following model impedances:
RS = 0.8 Q XS = 0.7 Q RR = 0.3 Q XR = 0.7 Q Xm = 35 Q
Calculate the input current and power factor of the motor for a speed of 1,200 r/min.
2. An eight-pole, three-phase, 220-V, 60-Hz induction motor has the following model impedances:
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RS = 0.78Q
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XS = 0.56 Q
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Xm = 32Q
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RR = 0.28Q
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XR = 0.84 Q
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Find the input current and power factor of this motor for s = 0.02.