The full name of a micro motor is a micro motor. The size of the motor is smaller than 160mm, and the voltage is 1~24v. The common micro motor is only a dozen millimeters, and hundreds of millimeters are rare. Micro motors are often used in control systems or transmission mechanical loads. There are many types of motors, which can be roughly divided into micro DC motors, stepping motors, linear motors, etc.

Although the micro motor is small in size, the internal structure is very complete. Taking the rotor of the micro DC motor as an example, it is divided into four parts.

1. Armature core

The armature core is the main part of the main magnetic circuit of the micro DC motor. It is used to place the armature windings. Most of them are stacked with silicon steel sheets to reduce the eddy current loss and hysteresis loss generated in the armature core during the operation of the micro motor.

2. Armature winding

The main function of the armature winding of the micro motor is to generate electromagnetic torque and induced electromotive force. In the micro DC motor, the armature winding is made of multiple coils. Generally, enameled wire is used. If there are special requirements, copper wire or silver is used. line.

Three, commutator

In the micro DC motor, the commutator and the brush are the key factors for the continuous rotation of the micro motor. Their main function is to change the direction of the current to make the micro motor continue to rotate (the brushless DC motor is commutated by Hall electronics, and there is no Commutator and brush).

Fourth, the shaft

The shaft of the micro motor supports the rotation of the rotor. The life of the micro motor is also related to the quality of the shaft. It requires a certain degree of mechanical strength and rigidity, and is mostly made of round steel. In addition to the above, the structure of the micro motor includes a case, a back cover, and so on.

I believe everyone already understands what a micro motor is. For more information about micro DC motors, please continue to pay attention to Tianfu Micro Motors.