[OCCRA]: recomended PWM frequency for CIM motors?

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[OCCRA]: recomended PWM frequency for CIM motors?

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26-11-2014, 11:23

DonRotolo

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Re: [OCCRA]: recomended PWM frequency for CIM motors?

It doesn't matter much, but as you increase frequency you do see Eddy current issues, which can cause the MOSFET to dissipate more heat. Not a huge factor below 20 kHz, but be aware.

Frequencies in the audio range will cause the motor to make noise - at that frequency.

12-16 kHz seems like a good starting spot. You should then vary this and repeat your measurements - what works best??

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