Capacitor-start 50 Hz AC motors are single-phase motors that use a capacitor to provide additional power during startup for higher torque than split-phase motors. They have a main winding and an auxiliary winding with a start capacitor for use in medium-to-high-torque requirements in auger drive, conveyor, shop tool, ventilation, and pump applications.

Split-phase 50 Hz AC motors have a main winding and an auxiliary winding for use in low-to-medium-torque applications such as blowers, fans, and small conveyors. They are single-phase and have a lower starting torque and are less energy efficient compared to capacitor-start/capacitor-run, and three-phase motors.

Three-phase 50 Hz AC motors don't require starting capacitors, run capacitors, or centrifugal starting switches that can wear out and fail. They operate with a higher torque and greater efficiency than single-phase 50 Hz motors of the same HP, rpm, and frame size.

Capacitor-start/run 50 Hz AC motors have a main winding and an auxiliary winding with both a start capacitor and a run capacitor for additional power during startup for higher torque and higher operating efficiency.