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Saturday, August 3, 2019

Why do you need a capacitor on an Induction motor?

Why do you need a capacitor on an Induction motor?

A capacitor is used in a single phase Induction motor to generate a phase difference between the torques which are generated by fluxes equal in magnitude but opposite in direction.(Double field revolving theory)


There is no rotating stator magnetic field, a single phase induction motor has no starting torque.
The idea behind capacitor start single phase motors is an extension of the split phase winding technique used to produce the starting torque in single phase induction motor.
So, I guess, you could just choose a commercially available capacitor whose ratings match the voltage, current and power you are dealing with.

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