Answer / jords

it depend on what kind of load.
but the real thing is,
as we increase frequency,the RPM of the motor also
increases.
high frequency can cause motor burning.
low frequency can reduce speed of the motor.

Answer / shinde

Assume motor having torque of 'X' Nm is of frequency 50Hz and voltage of 400V . if the frequency of the motor increased to 60Hz , in order to achieve same torque the V/F ratio should be same in either case. so motor may take more current in higher frequency to achieve same torque.

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