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23/12/14

Influence of Eddy Current Loss of Magnetic Steel on Rotor Temperature Rise of Permanent Magnet Motor

The rare earth permanent magnet synchronous motor (REPMSM) has the characteristics of small size, light weight and high efficiency. Theoretically, the rotor has no fundamental loss, and the rotor temperature rise should be low, but the actual situation is not. Taking an increased safety rare earth permanent magnet synchronous motor as an example, the rotor temperature rises up to 125°C during the test. If the rotor temperature is too high, it will cause demagnetization danger to the NdFeB permanent magnet and affect the normal operation of the motor. This paper analyzes the reasons that may lead to excessive temperature rise of the rotor, and puts forward measures to reduce the temperature rise. 1. Rotor structure The stator of REPMSM takes the stator of an asynchronous motor, and its structure generally refers to the structure of the rotor. Different

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