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Analysis of Mechanism and Principle of Rare Earth Permanent Magnet Motor
- Dec 06, 2018 -

Analysis of Mechanism and Principle of Rare Earth Permanent Magnet Motor

The electric vehicle powertrain is completely different from the traditional internal combustion engine. The power system is not composed of an engine, a clutch, a transmission, a differential, etc., but an energy storage mechanism (ESS) that stores electrical energy, and outputs energy to the converter and power control. The module (PEM) is composed of three links by controlling the sensor to sense the driver's operation requirements and road conditions, and the electric vehicle is more like an electronic device because its power system is complicated and precise.

Some time ago, the first batch of Tesla Model3 was delivered to the owner, and electric vehicles once again became the focus of attention.

Electric vehicles use electric energy to drive the car forward, and no harmful gas is generated in the process, so it becomes the most potential object to replace the traditional fuel car.

But do you know? The electric vehicle powertrain is completely different from the traditional internal combustion engine. The power system is not composed of an engine, a clutch, a transmission, a differential, etc., but an energy storage mechanism (ESS) that stores electrical energy, and outputs energy to the converter and power control. The module (PEM) is composed of three links by controlling the sensor to sense the driver's operation requirements and road conditions, and the electric vehicle is more like an electronic device because its power system is complicated and precise.

In the current part of the drive motor, the Tesla-based AC asynchronous motor and the BYD rare earth permanent magnet motor are the two most representative of the small car. Today, we will simply bring you some knowledge of rare earth permanent magnet motors.

Development history of rare earth permanent magnet motor

The world's first motor appeared as early as the 1920s, and the rotor part of this motor was a permanent magnet used to generate an excitation field. However, the permanent magnet material used at that time was natural magnetite ore (Fe3O4), and the magnetic energy density was very low. The motor made of it was bulky and was soon replaced by an electric excitation motor.

With the development of technology, there are many kinds of choices for permanent magnet materials. The most excellent one is rare earth materials. Therefore, the motor that uses rare earth permanent magnet materials is also called rare earth permanent magnet motor.


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