Which Magnets Are Used in Commercial Motors?

Most of us know that magnets play an essential role in commercial motors. But do you know which magnets are used in commercial motors? If not, keep reading and in this article, we will take a closer look at the magnets used in commercial motors.

Which Magnets Are Used in Commercial Motors?

Permanent magnets commonly used in motors include sintered magnets and bonded magnets, like AlNiCo magnets, ferrite magnets, SmCo magnets, neodymium magnets, etc.

1. AlNiCo Magnets

Alnico permanent magnet is the earliest widely used permanent magnet material, and its preparation process and technology are relatively mature. At present, Japan, the United States, Europe, Russia, and China all have factories producing such magnets. 

2. Ferrite Magnets

In the 1950s, ferrite magnets began to flourish. Especially in the 1970s, strontium ferrites with better performance in coercivity and magnetism were put into production in large quantities, rapidly expanding the use of permanent ferrites. As a kind of non-metallic magnetic material, ferrite magnets have no disadvantages such as easy oxidation of metal permanent magnets, low Curie temperature, and high cost, so they are very popular.

3. SmCo Magnets

SmCo magnets are permanent magnets with excellent magnetic properties that emerged in the mid-1960s, and their performance is very stable. Samarium-cobalt magnets are particularly suitable for manufacturing motors in terms of magnetic properties. However, due to their high prices, they are mainly used in the research and development of military motors such as aviation, aerospace, weapons, and high-performance motors in high-tech fields where the price is not the main factor.

4. NdFeB Magnets

NdFeB magnets are an alloy of neodymium and iron oxide. They have the advantages of extremely high magnetic energy products and coercivity, as well as high energy density. 

These advantages make NdFeB permanent magnets widely used in modern industry and electronic technology, making it possible to miniaturize, lighten, and thin equipment such as instrumentation, electro-acoustic motors, and magnetic separation magnetization.

But because they contain a lot of neodymium and iron, they are easy to rust. Surface chemical passivation is currently one of the best solutions to the above-mentioned problem.

Conclusion 

Thank you for reading our article and we hope it can help you to know which magnets are used in commercial motors. If you want to learn more about magnets, we would like to advise you to visit Stanford Magnets for more information.

As a leading magnet supplier across the world, Stanford Magnets has been involved in R&D, manufacturing, and sales of magnets since the 1990s. It provides customers with high-quality permanent magnets like SmCo magnets, neodymium magnets, AlNiCo magnets, and ferrite magnets (ceramic magnets) at a very competitive price.