What is the purpose of a part-winding starter?

The purpose of a part-winding starter is to apply power to only a portion of the motor windings during startup. This method is often used for larger motors to reduce the inrush current when the motor starts, as engaging all windings simultaneously may draw a high current that could damage the motor or the power supply. By energizing only part of the windings, the motor starts more smoothly and gradually ramps up to operational speed, which helps to mitigate mechanical stress and electrical impact on the system. This approach is particularly beneficial for motors designed to handle this type of starting method, allowing for a controlled startup and enhancing the longevity and reliability of both the motor and the entire system.