DC generator

A direct current generator is a machine that converts mechanical energy into direct current electrical energy. It is mainly used as a DC motor, electrolysis, electroplating, smelting, charging, and excitation power supply for AC generators. Although power rectifier components are also used in places that require direct current to convert alternating current into direct current, in some performance aspects, AC rectifier power cannot completely replace direct current generators.

DC motor

A rotating device that converts direct current electrical energy into mechanical energy. The stator of the motor provides a magnetic field, the DC power supply provides current to the winding of the rotor, and the commutator keeps the direction of the rotor current and the torque generated by the magnetic field unchanged. DC motors can be divided into two categories based on whether they are equipped with commonly used brush commutators, including brushless DC motors and brushless DC motors.

Brushless DC motor is a new type of DC motor developed in recent years with the development of microprocessor technology, the application of new power electronic devices with high switching frequency and low power consumption, as well as the optimization of control methods and the emergence of low-cost, high magnetic energy level permanent magnet materials.

Brushless DC motors not only maintain the good speed regulation performance of traditional DC motors, but also have the advantages of no sliding contact and commutation sparks, high reliability, long service life, and low noise. Therefore, they have been widely used in aerospace, CNC machine tools, robots, electric vehicles, computer peripheral equipment, and household appliances.

According to the different power supply methods, brushless DC motors can be divided into two categories: square wave brushless DC motors, whose back electromotive force waveform and supply current waveform are rectangular waves, also known as rectangular wave permanent magnet synchronous motors; The back electromotive force waveform and supply current waveform of a sine wave brushless DC motor are both sine waves.