In a split-phase motor, what function does the start capacitor serve?

In a split-phase motor, what function does the start capacitor serve?

• A. It provides continuous power
• B. It creates a phase difference for starting
• C. It protects the motor from overload
• D. It boosts the running speed

Answer: (B)

In a split-phase motor, the start capacitor plays a critical role during the startup phase by creating a phase difference between the main winding and the auxiliary winding. This phase difference is essential because it generates a rotating magnetic field, which is necessary for the motor to start and achieve its operational speed. When the motor is powered on, the capacitor temporarily stores electrical energy and releases it to the auxiliary winding, effectively shifting the phase of the current. This phase shift produces torque that allows the motor to overcome inertia and start turning. Once the motor reaches a designated speed, the capacitor's influence is removed, and the motor continues to run on the main winding alone. This function of creating a phase difference is fundamental to the operation of split-phase motors, making them efficient and reliable for various applications. The other options do not accurately describe the role of the start capacitor; it does not provide continuous power, protect the motor from overload, or boost the running speed. Instead, its specific purpose is to facilitate starting by enhancing the motor's ability to initiate rotation.

In a split-phase motor, the start capacitor plays a critical role during the startup phase by creating a phase difference between the main winding and the auxiliary winding. This phase difference is essential because it generates a rotating magnetic field, which is necessary for the motor to start and achieve its operational speed.

When the motor is powered on, the capacitor temporarily stores electrical energy and releases it to the auxiliary winding, effectively shifting the phase of the current. This phase shift produces torque that allows the motor to overcome inertia and start turning. Once the motor reaches a designated speed, the capacitor's influence is removed, and the motor continues to run on the main winding alone.

This function of creating a phase difference is fundamental to the operation of split-phase motors, making them efficient and reliable for various applications. The other options do not accurately describe the role of the start capacitor; it does not provide continuous power, protect the motor from overload, or boost the running speed. Instead, its specific purpose is to facilitate starting by enhancing the motor's ability to initiate rotation.