Which motor circuit is de-energized after the compressor comes up to speed?

The start winding is designed to provide the initial torque needed to start the compressor motor. When the compressor first starts, the start winding is energized, allowing the motor to reach its operating speed. Once the motor obtains sufficient speed—typically around 75% to 80% of its designated operational speed—the start winding is then de-energized. This prevents the start winding from overheating and potentially burning out, as it is not intended to carry continuous current during normal operation.

In contrast, the run winding remains energized while the motor is in operation, ensuring that the compressor continues to function efficiently during its runtime. The control circuit is responsible for managing power supply and control signals to various components in the system, rather than operating directly with the motor windings. The bypass winding is not a standard term used in compressor circuitry; instead, it may denote a function that is not applicable to this question.