Views: 0 Author: Site Editor Publish Time: 2022-09-17 Origin: Site
Neodymium strong magnets have the advantages of high coercivity, high remanence, and high magnetic energy product. Half of the neodymium products are widely used in the field of motors. The following content mainly introduces the relevant knowledge of permanent magnet motors, hoping to help you.
The following is the list:
What is a permanent magnet motor?
Permanent magnet motor type
What are the advantages of rare earth permanent magnet materials?
How are permanent magnet motors used in the automotive industry?
What is the difference between permanent magnet motor and ordinary motor?
What other applications are there for permanent magnet motors?
Permanent magnet motors use permanent magnets to generate the motor's magnetic field without the need for field coils or field current. It has high efficiency and simple structure. This 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.
Common permanent magnet motors are 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.
Due to the excellent magnetic properties of rare earth permanent magnet materials, a strong permanent magnetic field can be established without additional energy after magnetization. The rare earth permanent magnet motor made by replacing the electric field of the traditional magnetic rotor not only has high efficiency, but also has a simple structure, reliable operation, small size and light weight. It can not only achieve high performance (such as ultra-high efficiency, ultra-high speed, ultra-high response speed) that cannot be achieved by traditional excitation motors, but also can manufacture special motors that meet specific operating requirements, such as elevator traction motors, automotive special motors, etc.
The automotive industry is the largest user of permanent magnet motors. The motor is a key component of a car. There are more than 70 types of electric motors used for various purposes in ultra-luxury vehicles, most of which are low-voltage permanent magnet DC micromotors. Starter motors for cars and motorcycles can be cut in half by using neodymium permanent magnets and decelerating planetary gears.
1. The nature of the magnetic field. After the permanent magnet motor is made, it can maintain its magnetic field without external energy; ordinary motors need current to pass through to have a magnetic field.
2. Rotor structure. Permanent magnet poles are installed on the rotor of the permanent magnet motor; excitation coils are installed on the rotor of the ordinary motor.
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.
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, dedicated permanent magnet motors and related control systems, covering almost the entire motor industry.