The TDY-C motor is consist of TDY motor and high reliable planetary gear box, which has many features, such as compact construction, constant speed, high torque. There will be no impact current when the motors start, brake, reverse and stall instantly. The motors have certain holding torque, if they are excited by DC power, they will produce high holding torque. In addition, the motor can start, brake, reverse and stall instantly. They also can drive high inertia loading, and are mainly used in industrial automation, electric valve actuator, feed mechanism of lathes, medical apparatus, automatic production line, barrier gate, packaging machinery, textile machinery as super low speed and super low speed and super high torque driving devices.