电动汽车永磁同步电机最优弱磁控制策略*

doi:10.19562/j.chinasae.qcgc.2018.011.014

摘要/Abstract

摘要： 本文中提出了一种适用于电动车辆的以转矩为控制目标的弱磁控制策略,通过离线计算获得电机最大转矩特性曲线和策略切换转矩特性曲线,并以此为基础在电机d-q轴坐标系下根据反馈转速和目标转矩不断更新电机弱磁工作点,使其在以最大转矩电流比曲线、电流极限圆和最大转矩电压比曲线为边界的区域内移动,从而在复杂的运行工况下提高了电机转矩响应速度和运行效率。通过Matlab/Simulink仿真验证了整个控制策略的可行性和性能优势。

关键词: 电动汽车, 永磁同步电机, 最优弱磁控制, 转矩控制

Abstract: In this paper, a field-weakening control strategy for electric vehicles is proposed with torque control as objective. The characteristic curves of the peak torque and switching torque of motor are obtained by off-line calculation. On this basis and based on feedback speed and target torque, the field-weakened working points in d-q coordinates of motor are constantly updated and move within the region with the curve of the ratio of peak torque over current, current limit circle and the curve of the ratio of peak torque over voltage as boundaries. As a result, the torque response speed and operating efficiency of motor under complex working conditions are enhanced. Simulation with Matlab/Simulink verifies the feasibility of the control strategy proposed and the improvement of vehicle performance

Key words: EV, IPMSM, optimal field-weakening control, torque control

林程, 邢济垒, 黄卓然, 程兴群. 电动汽车永磁同步电机最优弱磁控制策略^*[J]. 汽车工程, 2018, 40(11): 1346-1353.

Lin Cheng, Xing Jilei, Huang Zhuoran, Cheng Xingqun. An Optimal Field-weakening Control Strategy for Permanent Magnet Synchronous Motor in Electric Vehicles[J]. , 2018, 40(11): 1346-1353.

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电动汽车永磁同步电机最优弱磁控制策略^*

An Optimal Field-weakening Control Strategy for Permanent Magnet Synchronous Motor in Electric Vehicles

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