基于单位矩阵的电动汽车永磁同步电机制动电流解耦技术研究  

Research on Decoupling Technology of Permanent Magnet Synchronous Motor Braking Current of Electric Vehicle based on Unit Matrix

作　　者：李晓庆 孟德智 杨家强[1] LI Xiaoqing;MENG Dezhi;YANG Jiaqiang(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：《大电机技术》2021年第4期19-23,34,共6页Large Electric Machine and Hydraulic Turbine

摘　　要：针对电动汽车永磁同步电机在制动状态下电流耦合问题,提出一种单位矩阵解耦控制算法以保证永磁同步电机制动时有良好的动态响应。在永磁同步电机数学模型的基础上设计了矩阵电流解耦控制器,将电流解耦控制器矩阵与永磁同步电机数学模型的乘积构成单位对角矩阵。通过矢量控制对所提算法和传统PI电流调节器进行仿真比较研究,仿真结果表明该算法能够有效解决电流环交直轴动态耦合问题,还可实现被控变量能1:1的快速准确跟踪控制变量,提高了系统制动过程中动态响应速度和准确性,最后搭建实验平台进行了验证。Aiming at the current coupling problem in the braking process of permanent magnet synchronous motor(PMSM)of electric vehicle,a unit matrix decoupling control algorithm is proposed to ensure good dynamic response of PMSM when braking.Based on the mathematical model of permanent magnet synchronous motor,a matrix current decoupling controller is designed.The unit diagonal matrix is formed by the product of the current decoupling controller matrix and the mathematical model of permanent magnet synchronous motor.The proposed algorithm is compared with traditional PI current regulator by vector control simulation.The simulation results show that the proposed algorithm can effectively solve the current loop AC-DC axis dynamic coupling problem,and the controlled variable can track the control variable 1∶1 quickly and accurately,which improves the dynamic response speed and accuracy in the process of system braking.Finally,the experimental platform is built to verify the result.

关 键 词：永磁同步电机 矢量控制 单位矩阵解耦算法 

分 类 号：TM351[电气工程—电机] TM341