Which type of motor typically has a low starting torque?

The shaded pole motor is known for having a low starting torque, making it suitable for applications that require only a small amount of initial force to start. This type of motor operates through a unique design where a portion of the pole face is shaded, creating a rotating magnetic field. However, this design sacrifices some starting torque in favor of simplicity and cost-effectiveness.

Shaded pole motors are often used in low-power applications that do not require high starting torque, such as small fans, blowers, or light-duty appliances. This characteristic aligns with the fact that these motors can start under very low load conditions and continue to run effectively in such scenarios.

In contrast, other motor types listed have different torque characteristics. Capacitor run motors tend to have better starting torque due to additional windings and capacitors that provide a phase shift. Split-phase motors also generate higher starting torque due to their design, while permanent split capacitor motors offer a similar advantage as they maintain the capacitor in the circuit during operation, facilitating better torque. Hence, the shaded pole motor stands out specifically for its lower starting torque, which is a defining feature of its application and design.