电动汽车用永磁同步电机转子初始位置检测  

Initial Rotor Position Detection for Electric Vehicle with Permanent Magnet Synchronous Motor

作　　者：章明霞 王志强[1] 陈炜[1] 张国政 ZHANG Ming-xia;WANG Zhi-qiang;CHEN Wei;ZHANG Guo-zheng(Tianjin Engineering Center of Electric Machine System Design and Control,Tianjin Polytechnic University,Tianjin 300387,China)

机构地区：[1]天津市电机系统先进设计与智能控制技术工程中心,天津工业大学,天津300387

出　　处：《新型工业化》2017年第10期49-56,共8页The Journal of New Industrialization

基　　金：国家自然科学基金(51407127、51577126)

摘　　要：永磁同步电机在新能源汽车特别是电动汽车上的应用越来越广泛,针对永磁同步电机起动时需要准确的转子初始位置信息,提出一种内置式永磁同步电机转子初始位置检测方法。该方法是基于高频电压信号注入的,通过对旋转高频电压信号的电流响应进行低通滤波,得到电流响应幅值,根据电流幅值与转子角θ的关系,用一种简单的线性公式得到θ,降低了算法复杂性。最后利用电机磁路的磁饱和效应来区分转子NS极,从而通过校正位置初判值得到转子初始位置检测值。仿真结果表明,该方法可以准确检测出电机转子初始位置,对电机参数依赖性低,检测误差小。Permanent magnet synchronous motor is used more and more widely in the new energy vehicles,especially the application of electric vehicles.An method of initial rotor position detection for Interior Permanent Magnet Synchronous Motor(IPMSM),is presented in order to obtain accurate initial rotor position when motor starts.It is based on high frequency voltage injection,first of all the rotating high frequency voltage signal is injected into the stator windings,and the rotor position can be gotten from the current response signal with a simple linear equation.It reduces the algorithm complexity.Then the inductance changes caused by magnetic saturation effect is used to distinguish the direction of rotor flux.And through the magnet polarity information,the initial rotor position detection in the first step can be compensated.Simulation results show that the proposed method can accurately detect the initial rotor position,which depend lightly on the motor parameters and the detection error is small.

关 键 词：电动汽车 内置式永磁同步电机 高频电压信号注入 转子初始位置检测 磁饱和效应 

分 类 号：TM351[电气工程—电机]