How to choose permanent magnets for earth permanent magnet motors

Previously, we have learned about the three starting methods of earth permanent magnet motors. It can be seen that the starting methods of this motor are: direct starting, reduced voltage starting, frequency-sensitive resistor starting, and reduced voltage starting can be subdivided into: thermal automatic starting. Lotus root reduced voltage starting, star delta reduced voltage starting. Today, the editor will discuss specifically how to choose permanent magnets for earth permanent magnet motors. I hope you can use them in real life after reading them.

And with the continuous development of the motor industry, I believe everyone is no stranger to earth permanent magnet motors! And people's requirements for motors are getting higher and higher, but when the earth permanent magnet motor appeared, it helped people solve a lot of problems. In addition, it is widely used in various industries.

Precisely because earth permanent magnets have the advantages of high remanence density, high coercivity and high magnetic energy product, the motor can be allowed to have a larger air gap length and air gap density. Therefore, in terms of permanent magnet placement and magnetic circuit There is great flexibility in structural design. It can be made into different structural shapes and sizes from traditional motors, such as disc motors, slotless motors, etc., according to the use occasions, especially the needs of automobiles, computers and aerospace engineering.

This can further reduce the mass and moment of inertia of the motor and improve the response sensitivity of the motor; it can also reduce the pulsation of the motor's torque, thereby increasing the smoothness of operation; it can also simplify the structure and process of the motor. Therefore, it has been widely used in computer peripherals, office equipment and occasions requiring precise positioning control.

For earth permanent magnet motors, the distinctive part is the permanent magnet, so when choosing permanent magnets for earth permanent magnet motors, we must be careful. So how should we choose its permanent magnets? In other words: What are the requirements when selecting permanent magnets? The contents are as follows:

1. It should be able to generate the required magnetic field in the designated working space.

2. The established magnetic field should have stability, and its magnetic properties should be within the allowable range with changes in operating temperature and environment.

3. It has good corrosion resistance and good mechanical properties, such as good toughness, high compressive strength, and processability.

4. Its price is reasonable and economical.

The above content is about the selection requirements for permanent magnets in earth permanent magnet motors. I believe everyone will have an understanding after reading it. I hope you can refer to the above content in the future selection process.