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determining values for starter capacitors 1

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pcb22000

Mechanical
Joined
Aug 24, 2003
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Location
US
how do i determine the value of a starter capacitor for an electric motor? is there a standard procedure/formula? if so, what is it? thanks!
 
There may be standard designs that all the motor mfrs use but I'm not sure. The best way is to contact the mfr. I can tell you that value of the capacitance will affect the torque of your motor. Also, another rule says to use a voltage of 1.5 x the highest the voltage the motor sees. The motor mfr may not tell you this.
 
Do a search on this site for more information.

If you have the motor and do not know the size of cap ... post the motor info and I may recognize it!
 
I somewhere read many years ego that a rule of thumb is a 1 KVAR of capacitor for each HP of motor power
 
pcb22000:
My statement about the torque of the motor actually refers to a "capacitor run" motor. Please pardon my error on that point.
 
just wanted to say thanks to all you folks for responding to my question. best regards to all of you!
 
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