矿用潜水泵高功率密度永磁同步电机极槽配合选择分析#br#

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doi:10.11799/ce202102033

Abstract

Abstract: Abstract The pole-slot match of PMSM is one of the important factors that affect the cogging torque and electromagnetic characteristics of the motor. The cogging torque and back EMF harmonic will cause vibration and noise, which will increase the temperature rise of motor seriously. In order to ensure the safety and stability of mine submersible pump in emergency rescue of mine water disaster, this paper takes 132kW permanent magnet synchronous motor as the object, and focuses on the selection principle of pole-slot match with less cogging torque and less back EMF harmonics. Firstly, the generation mechanism of cogging torque is analyzed, and the analytical expression of cogging torque is derived. The influence of pole-slot match on cogging torque is analyzed, and the principle of pole-slot match selection to reduce cogging torque is proposed; Then three kinds of common pole slot matching schemes are put forward, and the finite element simulation model of PMSM is established respectively. The harmonic component and amplitude in the back EMF are analyzed, and the pole slot matching scheme with the least harmonic content and the back EMF waveform more close to the sine wave is obtained; Finally, three schemes of cogging torque are simulated to verify the correctness of the principle of reducing cogging torque. Based on the above two results, the pole-slot match scheme of high-power permanent magnet synchronous motor for mine submersible pump is obtained.

CLC Number:

TD744

References 14

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Analysis of pole-slot match for high power density permanent magnet synchronous motor of mine submersible pump

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