基于Z源逆变器的电动汽车永磁同步电机驱动控制策略  

Drive and Control Strategy of Permanent Magnet Synchronous Motor for Electric Vehicle Based on Z-source Inverter

作　　者：许力 曹青松 易星 XU Li;CAO Qingsong;YI Xing(School of Automotive Engineering,Jiangxi University of Technology,Nanchang 330098,China)

机构地区：[1]江西科技学院汽车工程学院

出　　处：《微电机》2019年第11期56-60,共5页Micromotors

基　　金：国家自然科学基金(51765021);江西省科技厅重点研发项目(20181BBE50012);江西省教育厅科学技术研究项目(GJJ161144)

摘　　要：考虑到电动汽车行驶中存在外界转矩以及电池电压突降等现象,设计基于双向Z源逆变器的电动汽车永磁同步电机驱动控制方案。建立永磁同步电机的数学模型以及Clark和Park变换矩阵。根据Z源逆变器拓扑结构,分析直通态占空比与逆变器输出电压的关系,设计双向Z源逆变器的空间矢量调制算法,确定电机电压空间矢量的扇区位置与有效矢量的作用时间,得出逆变器各桥臂的切换时刻。采用MATLAB/SIMULINK软件搭建控制系统仿真模型,仿真研究转速、转矩、输入电压和输出电流在突加外界转矩以及电池电压突降下的响应情况,结果表明双向Z源逆变器驱动系统的可靠性,能满足电动汽车高性能的控制要求。Taking consideration of external torque and sudden drop of battery voltage for electric vehicle, the control scheme of driving permanent magnet synchronous motor(PMSM) based on bidirectional Z-source inverter was designed. The mathematical model of PMSM and the Clark/Park transformation matrix were established. According to the topological structure of the Z-source inverter, the relationship between the duty cycle of the shoot-through state and the output voltage of the inverter was analyzed. The algorithm of space vector pulse width modulation(SVPWM) for bidirectional Z-source inverter was designed, and the sector of voltage space vector of motor and the action time of the two effective vectors in the same sector were determined, and the switching time of each bridge arm of the inverter were obtained. The simulation model of the control system was established on Matlab/Simulink to research the response of rotational speed, torque, input voltage and output current under the condition of sudden external torque and sudden drop of battery voltage. The results showed that the reliability of the driving system of bidirectional Z-source inverter could meet the high-performance control requirements in electric vehicles.

关 键 词：双向Z源逆变器 永磁同步电机 空间矢量调制 直通零矢量 

分 类 号：TM351[电气工程—电机] TM341