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表贴式永磁同步电机的多参数在线辨识

, PP. 111-118

Keywords: 永磁同步电机,电机参数,在线辨识,模型参考自适应

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Abstract:

针对表贴式永磁同步电机的多参数辨识,提出一种基于模型参考自适应理论的在线辨识方法,可在同一模型中对定子电阻、交直轴电感和永磁体磁链进行辨识。该方法借助Popov超稳定理论设计自适应律,保证了特定条件下辨识的收敛性,同时采用分步辨识,克服多参数辨识的欠秩问题,保证了辨识结果的唯一性,从而实现多参数辨识。分步辨识首先利用电机q轴电流方程估算出交直轴电感,之后对d轴注入一个小电流值,利用已获得的电感值辨识出定子电阻和转子磁链,同时所辨识出的磁链可进一步用来在线估算定子电阻值的变化。仿真和实验结果表明,该方法可以在同一模型中准确辨识出电机的多个参数,且无需考虑电机的运行状态,具有实用性。

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