The bidirectional output permanent magnet DC motor can be divided into a permanent magnet brushless DC motor and a permanent magnet brush DC motor according to the presence or absence of a brush. The bidirectional output permanent magnet DC motor is a DC motor that uses a permanent magnet to establish a magnetic field. Permanent magnet DC motors are widely used in a variety of portable electronic devices or appliances, such as recorders, VCD machines, record players, electric massagers and various toys, and are also widely used in automobiles, motorcycles, hand dryers, electric bicycles, and batteries. The automobile, shipbuilding, aviation, machinery and other industries are also widely used in some high-precision products, such as video recorders, copiers, cameras, mobile phones, precision machine tools, bank counters, and banknote binding machines.
The bidirectional output permanent magnet DC motor is a DC motor that establishes a magnetic field by one or more permanent magnets. Its performance is similar to that of a forced excitation DC motor with constant excitation current, which can be easily adjusted by changing the armature voltage. Compared with the other-type DC motor, it has the advantages of small size, high efficiency, simple structure, and low copper consumption. It is the main type of low-power DC motor.
The bidirectional output permanent magnet DC motor is composed of a motor body and a driver, and is a typical mechatronic product. The stator windings of the motor are mostly made into a three-phase symmetrical star connection, which is very similar to the three-phase asynchronous motor. A magnetized permanent magnet is adhered to the rotor of the motor, and a position sensor is mounted in the motor for detecting the polarity of the rotor of the motor. The driver is composed of power electronics, integrated circuits, etc., and functions to receive start, stop, and brake signals of the motor to control the starting, stopping, and braking of the motor.