Application of NdFeB in Permanent Magnet Motor Industry

NdFeB strong magnets have the advantages of high coercive force, high remanence and high magnetic energy product. Half of NdFeB products are widely used in the motor field. The following content mainly introduces the relevant knowledge of permanent magnet motors, and I hope it will be helpful to you.

1. What is a permanent magnet motor?

The permanent magnet motor uses permanent magnets to generate the magnetic field of the motor without the need for an excitation coil or excitation current. It has high efficiency and a simple structure. It is a good energy-saving motor. With the emergence of high-performance permanent magnet materials and the rapid development of control technology, the application of permanent magnet motors will become more and more extensive.

Neodymium iron boron magnets are widely used in permanent magnet motors.

2. Types of permanent magnet motors:

Common permanent magnet motors include: permanent magnet DC motor, permanent magnet AC motor

Permanent magnet DC motors include: brushed DC motors, brushless motors, stepper motors, etc.

Permanent magnet AC motors include: synchronous permanent magnet motors, permanent magnet servo motors, etc.

3. What are the advantages of rare earth permanent magnet materials?

Due to the excellent magnetic properties of rare earth permanent magnet materials, a strong permanent magnetic field can be established after magnetization without additional energy. The rare earth permanent magnet motor made by replacing the electric field of the traditional magnetic rotor is not only efficient, but also simple in structure, reliable in operation, small in size and light in weight. It can not only achieve high performance (such as ultra-high efficiency, ultra-high speed, ultra-high response speed) that traditional excitation motors cannot achieve, but also manufacture special motors that meet specific operating requirements, such as elevator traction motors, automotive special motors, etc.

4. How are permanent magnet motors used in the automotive industry?

The automotive industry is the largest user of permanent magnet motors. The motor is a key component of the car. In super luxury cars, there are more than 70 types of motors for various purposes, most of which are low-voltage permanent magnet DC micro motors. By using NdFeB permanent magnets and reducing the planetary gear speed, the starting motors of cars and motorcycles can be reduced by half.

5. What is the difference between a permanent magnet motor and an ordinary motor?

1. Magnetic field properties. After a permanent magnet motor is manufactured, it does not require external energy to maintain its magnetic field; ordinary motors require current to be passed through to generate a magnetic field.

2. Rotor structure: The permanent magnet motor rotor is equipped with permanent magnet poles; the ordinary motor rotor is equipped with excitation coils.

3. Applicable occasions: Permanent magnet motors are usually used in low-power applications; ordinary motors, especially excitation motors, are often used in high-power applications.

6. What other applications do permanent magnet motors have?

Rare earth permanent magnet motors are widely used in aviation, aerospace, national defense, equipment manufacturing, industrial and agricultural production, and daily life. It includes permanent magnet synchronous motors, permanent magnet generators, DC motors, brushless DC motors, AC permanent magnet servo motors, permanent magnet linear motors, voice coil motors, special permanent magnet motors and related control systems, covering almost the entire motor industry.