电力系统保护与控制2023，Vol.51Issue(24)：13-21,9.DOI:10.19783/j.cnki.pspc.230591
基于非线性拟合单位电流最优输出功率的永磁同步电机位置估计误差补偿策略
Nonlinear fitting of maximum output power per current for position error compensation in sensorless control of a permanent magnet synchronous motor
摘要
Abstract
There is a problem that rotor position estimation accuracy is affected by the parameter variation of a permanent magnet synchronous motor(PMSM).Thus a nonlinear compensation strategy for position estimation error based on the maximum output power per current is proposed.First,the influence of motor parameter error,especially inductance error,on the precision of position estimation is analyzed.The correlation model between position estimation error and output power per unit current is established,and the relationship model between inductance error and optimal output power is derived.Then,combined with the power model,a polynomial inductance error nonlinear model is constructed.By fitting the polynomial model with a few test points,the error inductors can be identified and used to accurately compensate for the position estimation errors.The proposed method is simple,independent of motor parameters,and can effectively overcome noise interference.Finally,simulation and experimental results verify the effectiveness of the proposed compensation strategy.关键词
永磁同步电机/单位电流最优功率/位置估计误差/非线性模型Key words
permanent magnet synchronous motor(PMSM)/maximum output power per current/position estimation error/nonlinear mode引用本文复制引用
姚培煜,卢芋廷,冯国栋,彭卫文,丁北辰,吴轩..基于非线性拟合单位电流最优输出功率的永磁同步电机位置估计误差补偿策略[J].电力系统保护与控制,2023,51(24):13-21,9.基金项目
This work is supported by the National Natural Science Foundation of China(No.62103455 and No.52105079). 国家自然科学基金项目资助(62103455,52105079) （No.62103455 and No.52105079）
