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With a inverter fed drive (frequency inverter), you can increase nominal rpm of a induction motor, but may be the iron core drop in saturation mode and mechanical damage can run because the motor have specifically mechanical design. I think that some up, like 10% (if 50 Hz nominal, then 55 Hz operation) is possible without risk.

Remember: Induction motor runs some down of synchronous speed Ns, and Ns=120*f/p where p is the number of poles (if motor runs near of 1800 rpm, it may has 4 poles and is based on physical construction of motor) and f the frequency. Then, only f may be adjusted to obtain velocity variation.

Bye!

JACk

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13y ago

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