A 3-ph, 5000-hp, 12-pole, 60-Hz synchronous motor uses a cycloconverter to vary speed. Determine the maximum speed

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A 3-ph, 5000-hp, 12-pole, 60-Hz synchronous motor uses a cycloconverter to vary speed. Determine the maximum speed at which it can be operated to limit the harmonics to the generally acceptable level.

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