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What are the main categories of DC motors?

更新:02-02-2018
摘要:

 continuous current generator A direct current generato […]

 continuous current 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 for DC motors, electrolysis, electroplating, electrosmelting, charging, and excitation power of alternators. Although AC power is used to convert AC power to DC power where DC power is required, AC power supply cannot completely replace DC generators in terms of performance.

continuous current motor

A rotating device that converts DC electric energy into mechanical energy. The motor stator provides the magnetic field, the DC power supply provides the current to the rotor winding, and the commutator keeps the direction of the rotor current and the torque produced by the magnetic field unchanged. DC motors can be divided into two categories according to whether they are equipped with brush-commutator, including brushless DC motor and brushless DC motor.

Brushless DC motor is a new type of DC motor which has been developed in recent years with the development of microprocessor technology and high switching frequency, low power consumption new type of power electronic device, and the optimization of control method and the appearance of low cost and high magnetic energy level permanent magnet material.

Brushless DC motor not only maintains the good speed regulation performance of traditional DC motor, but also has the advantages of no sliding contact and commutation spark, high reliability, long service life and low noise, so it has been widely used in aerospace, CNC machine tools, robots, electric vehicles, computer peripherals and household appliances.

According to the different power supply mode, brushless DC motor can be divided into two types: square wave brushless DC motor, its back EMF waveform and power supply current waveform are rectangular wave, also known as rectangular wave permanent magnet synchronous motor, sine wave brushless DC motor, its back EMF waveform and power supply current waveform are sine wave.

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