_____type of single phase induction motor operates at better power factor at full load?

• A. Resistance Split-phase
• B. Shaded pole
• C. Capacitor-start, induction-run
• D. Capacitor-start, Capacitor-run

Answer: (D)

This type of motor is designed to operate with the start winding and it’s series capacitor permanently connected to the supply. lt has two capacitors connected in parallel in the start winding circuit for starting purposes. The running capacitor is employed to correct the power factor. As a result, this motor has a higher starting torque as well as a higher efficiency. These motors are employed in sizes ranging from 375 W to 7.5 kW.  The power factor of these motor is upto 80% to 100%.