Extended spectral-domain model of permanent magnet synchronous motor vector control system and its application in resonance suppression
Addressing at the problem that the spectral-domain model of the original vector control system has a significant error when directly employed for the performance analysis of high-speed and on-load system,the construction theory and process are reanalyzed.By identifying the root cause of the error,an extended spectral-domain model is proposed that can be directly used for the performance analysis of the permanent magnet synchronous motor vector control system.This is achieved by incorporating the role of back electromotive force and load into the system's mathematical model and weakening the influence of the direct axis current on the system error.In addition,the application technology of the extended spectral-domain model in the system resonance suppression is also studied.The bandwidth before and after the system resonance suppression based on the analytical method and the calculation results of the resonance point and the anti-resonance point are given.Based on passing verification,the advanced correction network technology is further used to restore and expand the suppressed bandwidth.The research shows that the extended model not only has small error in performance analysis,but also can directly obtain the frequency response characteristics of the system by analytical method,which overcomes the limitations that the spectral-domain model of the original vector control system needs to use the frequency sweep experiment method to obtain the frequency response characteristics of the system under high speed and load.
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维普
