Visit：200 Date：2018-09-28

A DC micromotor is a rotating electrical machine that outputs or inputs DC power, called a micro DC motor.

DC micro motor

DC micro motors have the following characteristics

1. The efficiency of a miniature DC motor is generally higher than that of other types of motors, so the same output power is achieved, and the volume of the DC motor is generally small. For the limited installation position, the micro DC motor is relatively suitable.

2. The characteristic of the micro DC motor is that the motor can automatically reduce the speed according to the load size to achieve a great starting torque. This is a difficult AC motor. In addition, DC motors are more likely to absorb sudden changes in load size, and the motor speed can be automatically adapted to the load size.

What are the types of DC micro motors?

Generally divided into special motors, electromagnetic motors and permanent magnet motors. Special motors generally have no windings, and the drive is more complicated, as a self-contained system of motors. Electromagnetic motors have different characteristics due to their different excitation methods.

The performance of the permanent magnet motor is similar to that of the electromagnetic shunt motor. The starting torque is large, the mechanical characteristics are hard, and the speed changes little when the load changes. It is suitable for low-power DC drives, such as electric toys, power tools, audio equipment, and automotive electronics. Wait. This paper mainly discusses the driving of such micro-DC motors with low power, low voltage and small volume.

The motor has only two leads, the supply voltage or current can be adjusted, the polarity of the two leads can be changed, and the motor can be reversed. The drive circuit is controlled by the single-chip microcomputer, generally requires forward and reverse rotation and speed control, and the volume should not be too large.