increasing voltage input to motor

[majuba]

Good day

I have recommended a motor be swapped with a replacement as the previous design is obselete. There has been a 10 % increase in voltage. The current measurements have also increased, which is expected.

Assuming all parameters remain the same, will the power output of the motor change? Will the same amount of mechanical power be transferred to the shaft?

Thanks in advance

 

[LionelHutz]

The motor will run at it's operating speed (within a few rpm because of slip). At the operating speed, the load will only take whatever amount of power it requires to keep rotating. So, no, the increase in voltage won't make the motor transfer more power to the load.

 

[ozmosis]

Why has the current increased?
If the load has increased to your application and your voltage has increased, I would have thought the rated power of your motor must increase unless the current increase is still within the required level for the power rating of the motor. Or am I missing something somewhere?

 

[majuba]

The load has not increased. I thought since the impedance stayed the same, the voltage increased so the current woult increase.

 

[dcasto]

HP = V * I *PF * constant If V goes up, I must go down.

 

[edison123]

You are hitting magnetic flux saturation with the increased voltage. So, it will not transfer to shaft power and will result in increased core heating and core losses.

*Why a man thinks he outrun a chasing dog when it has twice as many legs?*