The torque motor is a special motor with a large number of poles. It can continue to operate when the motor is running at a low speed or even locked (ie, the rotor cannot rotate) without causing damage to the motor. In this mode of operation, the motor can provide a stable torque to the load (hence the name torque motor). The torque motor can also provide a torque (brake torque) that is opposite to the direction of travel. The shaft of the torque motor does not output power at a constant power but outputs power at a constant torque.
Torque motors include: DC torque motors, AC torque motors, and brushless DC torque motors. It is widely used in machinery manufacturing, textile, paper, rubber, plastic, metal wire and wire and cable industries.