Generator Design question

  • Thread starter DUET
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  • #1
DUET
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Today I observe some generators of different rating which have designed by a company called X. I notice that the speed of the rotor reduce as the rating of the generator increased.

Could someone please explain it to me why?
 

Answers and Replies

  • #2
Baluncore
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You have not specified DC generator or AC alternator.

More power requires thicker copper and more magnetic material. That makes it a bigger diameter rotor. More circumference uses more poles of optimum aspect ratio, so less speed is needed to generate the same frequency AC power.
 

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