Frequency And Torque

[yuri]

Hello

Can someone say me in which case the torque of an induction motor starting at lowered voltage will be higher :

1. When the voltage frequency is not changed

2. Or when the frequency is proportionally lowered ?

[marke]

Hello Yuri

 

If you reduce the voltage and keep the frequency constant, then the V/Hz ratio is reduced, the flux in the iron is reduced and the torque is also reduced.

If you reduce the voltage and frequency proportionally, the V/Hz ratio remains constant and the troque does not change.

 

Best regards,

Mark.

[yuri]

Hello Mark !

Thank you very much, I also thought so, you confirmed it (was a bit in a doubt about that however)

My best regards