It is a motor with constant speed system through magnetic feedback method. The motor is composed of a motor housing that has a cooling cavity at one side, a rotating shaft with one end embedded into the cooling cavity, a cooling fan linked to the motor shaft, a magnet (or more) attached to the cooling fan for following the fan rotating motion, linings of cooling cavity and a Hall sensor. The Hall sensor measures the strength of a magnetic field, therefore producing an output signal corresponding to the speed of motor rotation.

This technology aims at lowering motor cost, improving anti-vibration ability, as well as precise control of motor speed. By using the technology, our wire feeder operates with closed-loop control and unique software algorithm to ensure constant high torque at low-speed running, thus providing constant speed through the entire wire feeding process. This control technology plays a vital role in achieving one-key control of MIG welding machine. At the same time, our independently developed chip along with built-in welding expert database helps simplify welding parameter combinations while guaranteeing welding reliability and stability.