The working principle and characteristics of rare earth permanent magnet motor

Rare earth permanent magnet motors have a series of advantages such as small size, light weight, high efficiency and good characteristics due to the high magnetic energy product and high coercivity (especially high intrinsic coercivity) of rare earth permanent magnets.

Our Ningbo Bestway Magnet Co., Ltd. specializes in the production of Arc magnets used in motors.

1. Advantage

Because of the excellent magnetic properties of rare earth permanent magnet materials, it can establish a strong permanent magnetic field without the need for additional energy after magnetization. The structure is simple, the operation is reliable, and it can meet the requirements of small size and light weight. This motor can not only achieve high functions (such as ultra-high efficiency, ultra-high speed, ultra-high response speed) unmatched by traditional electric excitation motors, but also can be made into special motors that can meet specific operation requirements, such as elevator traction motors, special motors for automobiles motor etc. The combination of rare earth permanent magnet motor and power electronic technology and microcomputer control technology has further improved the performance of the motor and transmission system to a new level. Then improving the function and level of the supporting skills is an important development direction for the motor industry to adjust the industrial structure.

The use of rare earth permanent magnet motors is extremely extensive, covering almost all fields of 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, special permanent magnet motors and related control systems, covering almost the entire motor industry.

2. The working principle of rare earth permanent magnet motor

The working principle of rare earth permanent magnet motor is the same as that of electric excitation synchronous motor, the difference is that the former uses permanent magnets instead of excitation windings for excitation. When the three-phase stator windings of the permanent magnet motor are fed with a three-phase alternating current with a frequency of a rotating magnetic field that moves at a synchronous speed will occur. In a steady state, the main pole magnetic field rolls synchronously with the rotating magnetic field, so the rotor speed is also the synchronous speed, the stator rotating magnetic field and the main pole magnetic field established by the permanent magnets remain relatively stable, and they interact and generate electromagnetic torque, drive the motor to rotate and perform energy conversion.

If you have any questions and needs about the Arc magnet used in Motor, please feel free to drop question to our NINGBO BESTWAY MAGNET Co., Ltd. at any time. We will provide professional answers in a timely manner.