高速永磁同步电机解耦控制——复矢量解耦及参数灵敏度分析  

Decoupling Control of High-speed PMSM——Complex Vector Decoupling and Parameter Sensitivity Analysis

作　　者：顾思芸 沈建新[1] GU Siyun;SHEN Jianxin(College of Electrical Engineering,Zhejiang University,Hangzhou 310027,China)

机构地区：[1]浙江大学电气工程学院,杭州310027

出　　处：《微电机》2023年第12期17-24,共8页Micromotors

基　　金：国家自然科学基金(51837010,U22A20214)。

摘　　要：永磁同步电机(PMSM)运行在高速工况时交-直轴耦合问题严重,对系统控制性能造成不利影响,甚至导致电流环失稳;而解耦策略的参数需要根据电机参数进行整定,对电机参数有一定的依赖性,当电机参数发生扰动失配时会影响解耦效果。针对上述问题,建立PMSM传统PI电流控制系统的复矢量模型,分析耦合对系统动稳态性能的影响。对比分析反馈解耦和复矢量解耦在解耦原理和效果上的特点,并定义解耦策略参数灵敏度函数,用于分析不同解耦策略的电阻及电感参数灵敏度。灵敏度分析结果表明复矢量解耦具有更好的解耦控制效果,对电感和电阻参数均不敏感,鲁棒性较高。采用Simulink仿真对比了不同解耦策略的效果,结合参数失配仿真验证了灵敏度分析的正确性。Permanent magnet synchronous motor(PMSM)has a serious problem of d-axis and q-axis coupling under high-speed conditions,which adversely affects the system control performance and even leads to instability of the current loop.Control parameters of the decoupling strategy need to be adjusted according to the motor parameters,which has a certain dependence on the motor parameters.When the motor parameters are disturbed and mismatched,the decoupling effect may be deteriorated.To solve the above problems,complex vector model of the PMSM traditional PI current control system was established,and the influence of coupling on the dynamic and steady state performance of the system was analyzed.The characteristics of feedback decoupling and complex vector decoupling in decoupling principle and effect were compared and analyzed.A sensitivity function of the decoupling strategy parameters was defined to analyze the sensitivity of resistance and inductance parameters of different decoupling strategies.The sensitivity analysis results show that complex vector decoupling has better decoupling control effect,and is less sensitive to the inductance and resistance parameters,that is,it has high robustness.The effects of different decoupling strategies were compared with Simulink simulation,and the correctness of the theoretical analysis was verified with parameter mismatch simulation.

关 键 词：永磁同步电机 解耦控制 复矢量 电流环稳定性 灵敏度分析 

分 类 号：TM351[电气工程—电机] TM341[自动化与计算机技术—检测技术与自动化装置] TP273[自动化与计算机技术—控制科学与工程]