Switching Frequency

[chaterpilar]

Will increasing the switching frequency of a variable speed drive have any effect on the current drawn by the motor..?

 

Any thoughts..?

[marke]

Hello chaterpilar

 

No, changing the switching speed should not significantly affect the current drawn by the motor. It will however, increase the switching losses in the drive.

There will be an increase in the capacitive current into the motor as at each switching transition, current flows to chare up the capacitance of the motor, but this is small compared to the steady state current into the motor.

 

Best regards,

[chaterpilar]

Thanks Marke for your reply.