NEWS

A motor is an electromagnetic device that converts mechanical energy and electrical energy into each other. To create the air gap magnetic field necessary for electromechanical energy conversion in the motor, there can be two methods. One is to generate current through the magnetic tile of the motor winding, which requires not only a special winding DC motor magnetic tile group and corresponding equipment, but also a continuous supply of energy to maintain the current flow, such as general DC motors and synchronous motors; the other is The first is to generate a magnetic field by a permanent magnet, which can simplify the motor structure and save energy. This is a permanent magnet motor.

After the permanent magnet excitation is selected for the DC motor, it not only retains the outstanding speed regulation characteristics and mechanical characteristics of the electric excitation DC motor, but also has the advantages of simple structure and process, small volume, low copper consumption and high power due to the elimination of excitation winding and excitation loss. feature. Therefore, permanent magnet DC motors are used in many applications from household appliances, portable electronic equipment, power tools to precision speed and azimuth transmission systems that require excellent dynamic performance. Among the miniature DC motors below 500W, permanent magnet motors account for 92%, while those below 10W account for more than 99%.