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1. The recent method of smooth speed control of a three-phase induction motor over a wide range is :





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MCQ->The recent method of smooth speed control of a three-phase induction motor over a wide range is :....
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MCQ->A 3 phase induction motor is controlled by voltage and frequency control such that the ratio V/f is constant. At 50 Hz, the speed is 1440 rpm. At 25 Hz, the speed is likely to be....
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