By approximately how much does a start capacitor increase motor torque?

The correct answer indicates that a start capacitor can increase motor torque by approximately 250%. This result stems from the function of the start capacitor in single-phase induction motors. When the motor starts, the start capacitor creates a phase shift in the electrical current, allowing for a stronger magnetic field which in turn provides the additional torque needed to overcome inertia at startup.

This significant increase in torque—from the baseline torque without the capacitor—enables the motor to initiate movement more effectively. This is particularly important for applications requiring high starting torque to ensure reliable operation.

Understanding this principle is vital for anyone working with air conditioning and refrigeration systems, as proper motor operation is crucial in these applications. Enhanced starting torque minimizes strain on the motor during startup, leading to increased longevity and reduced risk of failure.