Which type of motor is known for high starting torque and high starting current?

A capacitor-start motor is recognized for its ability to provide high starting torque and high starting current. This type of motor incorporates an additional capacitor in series with the starting winding, which enhances the phase shift between the current in the starting winding and the running winding. As a result, this design creates a strong magnetic field that allows the motor to achieve high torque at the moment of start-up.

This characteristic is especially important in applications where the motor needs to start under load, such as in air compressors or fans, where sufficient torque is necessary to overcome inertia and begin operation. The high starting current is reflective of the extra energy required to initiate the motor's rotation when it is first powered, which ensures that the rotor quickly gains the speed necessary for full operational efficiency.

Other motor types, while useful in various applications, do not provide the same level of starting torque combined with high starting current, making the capacitor-start motor particularly suited for demanding starting conditions.