In terms of efficiency, how do capacitor motors compare to shaded pole motors?

Capacitor motors are generally more efficient than shaded pole motors due to their design and operational characteristics. Capacitor motors are equipped with a starting capacitor that provides an additional phase of current necessary for creating a rotating magnetic field, which allows for greater torque and smoother operation. This design results in better power factor correction and improved efficiency during operation.

In contrast, shaded pole motors have a simpler construction and rely on a shading coil to create a phase shift, which often leads to lower starting torque and less efficient operation overall. As such, they tend to have a higher power loss and lower efficiency compared to capacitor motors. This is particularly evident in applications requiring higher starting torque or continuous operation over time.

Therefore, the assertion that capacitor motors are generally more efficient aligns with the technical principles of motor operation and performance metrics.