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【Daily Question】Electrical Technology 2019-3-8

2019-03-08View Original

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Today is International Women’s Day, March 8th on the Gregorian calendar, and it is also the day when the Dragon raises its head, February 2nd on the lunar calendar; For the Chinese people, it is truly a once-in-a-century day of dragons and phoenixes. Wish everyone a happy holiday! For a 4-pole, 3-phase asynchronous motor, if the speed n0 of the rotating magnetic field is required to be 1800 r/min, then the frequency of the power supply should be Hz. A. 50    B. 30    C. 60    D. 100C

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