考虑等效电磁损耗电阻偏移的永磁同步电机直流信号注入在线参数辨识方法  

DC-Signal-Injection-Based Online Parameters Identification for Permanent Magnet Synchronous Machine Considering Variation of Equivalent Electromagnetic Loss Resistance

作　　者：马铱林 袁浩 尹威 杨欢[1,2] Ma Yilin;Yuan Hao;Yin Wei;Yang Huan(College of Electrical Engineering Zhejiang University,Hangzhou 310027 China;Zhejiang Provincial Key Laboratory of Electrical Machine Systems,Hangzhou 310027 China)

机构地区：[1]浙江大学电气工程学院,杭州310027 [2]浙江省电机系统智能控制与变流技术重点实验室,杭州310027

出　　处：《电工技术学报》2023年第22期6015-6026,共12页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金(52177062);中央高校基本科研业务费专项资金(226-2022-00011)资助项目。

摘　　要：在实际运行过程中,永磁同步电机的电气参数将受到温度、磁饱和等诸多物理因素的影响而发生偏移,进而影响到效率最优控制、电流解耦控制等优化算法的运行效果。因此,为实现高性能电机控制,永磁同步电机的多电气参数在线辨识显得尤为重要。然而,现有参数辨识方法并未考虑铁磁损耗的影响,更未关注铁磁损耗随电流的偏移情况,所以在辨识精度上仍存在提升空间。对此,该文综合考虑铁磁损耗、铜损,将其集总为电磁损耗,并基于串联电磁损耗电阻模型,提出一种考虑等效电磁损耗电阻偏移的永磁同步电机直流信号注入在线参数辨识方法。该方法首先提出等效电磁损耗电阻随电流偏移的电机模型;其次由此设计同时考虑磁饱和、等效电磁损耗电阻偏移的直流信号注入在线参数辨识方法;由于待求解方程组较多,采用最小方均算法进行参数求解;最后通过实验测试所提方法的准确性,测试结果表明,与正弦信号注入法、传统直流信号注入法相比,所提方法的参数精度有所提升。Permanent magnet synchronous machines(PMSMs)are widely used for their high operating efficiency.During the application,the parameters of PMSMs may vary a lot when considering the effect of temperature,magnetic saturation,and so on.In this case,the performance of some optimal control strategies,such as the maximum efficiency control and current decoupling control,may decay.Thus,to achieve high-performance control,online parameter identification is important.However,there are few parameter identification methods considering the ferromagnetic loss and its variation with currents,while the ferromagnetic loss occupies a great proportion of the PMSMs’loss.Therefore,this paper integrates ferromagnetic loss and copper loss as electromagnetic loss.Then,an improved DC-signal-injection-based online parameters identification is proposed considering equivalent electromagnetic loss resistance variation.Firstly,the magnetic saturation of PMSMs and the variation of electromagnetic loss with current are discussed.Due to the magnetic saturation characteristic of ferromagnetic materials,the magnetic permanence of PMSMs may be decreased as the current rises,which,in turn,affects the inductance and flux linkage.Besides,when considering the change of current vectors,the copper loss may be variable due to the proximate effect.Meanwhile,the ferromagnetic loss may also vary with the changeable magnetic distribution.An improved series electromagnetic loss resistance model is proposed.Apparent flux linkage and incremental inductance are used to characterize the magnetic saturation,and change rates of the equivalent resistance are used to represent variations in electromagnetic loss.Secondly,4 groups of d-/q-axis operating currents are chosen based on the criterion of alternating changes in d-/q-axis currents.According to the analysis,if the current increment of each change is non-zero,the steady-state voltage equations of these 4 groups are linearly independent.That is,the corresponding coefficient matrix is full-rank,allowing for the fu

关 键 词：永磁同步电机 电磁损耗 参数辨识 直流信号注入 

分 类 号：TM341[电气工程—电机]