Research on Full Speed Domain Stability of Sensorless Control of New Energy Vehicle Motor Based on High Frequency Signal Injection

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AUTO ELECTRIC PARTS ›› 2026, Vol. 1 ›› Issue (8) : 1-4.

Chen Guigang

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Abstract

To address the issue of insufficient stability of position sensorless control for Permanent Magnet Synchronous Motors (PMSMs) in the entire speed range of new energy vehicles, a composite control strategy based on high-frequency signal injection is proposed. Simulation results show that within the full speed range of 0 to 1500 r/min, the position estimation error is less than 0.5°, and the speed fluctuation amplitude is lower than 2%. Compared with the traditional high-frequency injection strategy, the stability of low-speed startup is improved by 30%, and the anti-interference ability at high speeds is enhanced by 25%. The proposed strategy can satisfy the dynamic performance requirements of new energy vehicle power systems.

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new energy vehicles / Permanent Magnet Synchronous Motor / sensorless position control / high frequency signal injection / full-speed domain stability

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Chen Guigang. Research on Full Speed Domain Stability of Sensorless Control of New Energy Vehicle Motor Based on High Frequency Signal Injection[J]. AUTO ELECTRIC PARTS. 2026, 1(8): 1-4

References

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