来源：http://www.jnmcd.com 发布时间：2019-02-25 浏览：次
1. The power of micro DC motor is generally higher than that of other types of motor, so the volume of DC motor is generally smaller when it reaches the same output power. For the limited azimuth of the device, the micro DC motor is relatively suitable.
2. The characteristic of micro DC motor is that it can reduce the speed actively according to the size of the load and reach the maximum starting torque. AC motors are more difficult at this point. In addition, the DC motor is relatively simple to absorb the sudden change of the load size, and the motor speed can actively accustom to the load size.
What kinds of DC micro motors can be divided into?
Generally divided into special motor, electromagnetic motor and permanent magnet motor. Special motors generally have no windings, and their driving is complex. As a kind of motor, special motors have their own system. Because of different excitation methods, electromagnetic motors have different characteristics.
The performance of permanent magnet motor is similar to that of electromagnetic shunt excitation motor. It has large starting torque, hard mechanical characteristics and little change in speed when load changes. It is suitable for low power DC drive, such as electric toys, electric tools, audio equipment, automotive appliances, etc. This paper mainly reviews the drive of this kind of micro DC motor with small power, low voltage and small volume.
This kind of motor has only two leads, which can be adjusted by adjusting the supply voltage or current. The polarity of the two leads can be changed and the motor can be reversed. Its driving circuit is controlled by single chip computer. Generally, it is required to be able to drive with forward rotation and speed regulation, and the volume should not be too large.
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