Construction: A capacitor start motor is a single-phase induction motor. It features a capacitor in series with the starting (auxiliary) winding, while the main winding connects directly to the power supply.
Working Principle: Upon starting, the capacitor induces a phase shift between the currents of the main and starting windings.
This phase difference generates a rotating magnetic field, creating starting torque.
The motor initiates rotation and accelerates.
At approximately 70-80% of its operational speed, a centrifugal switch disengages the starting winding and capacitor.
The motor then operates solely on its main winding.
This configuration enables the motor to commence operation under load with substantial starting torque.
