Question 534Electricity & Electronics - Assistant Engineer

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If a 12-pole three-phase synchronous alternator is operating at 590 rpm, what will be its output frequency?

A58 Hz
B59 Hz
C60 Hz
D61 Hz
AI Explanation

The correct answer is B) 59 Hz. To calculate the output frequency of a synchronous alternator, you can use the formula: Frequency (Hz) = (Number of Poles x RPM) / 120. In this case, the alternator has 12 poles and is operating at 590 rpm. Plugging these values into the formula, we get: Frequency = (12 x 590) / 120 = 59 Hz. The other options are incorrect because: A) 58 Hz is too low, C) 60 Hz is too high, D) 61 Hz is too high.

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Official Resources
46 CFR Electrical Engineering 46 CFR Machinery & Electrical USCG National Maritime Center
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