电动汽车永磁同步电机无传感器FOC-DTC混合控制系统

摘要

For the efficiency control issue of permanent magnet synchronous motor (PMSM) in electric vehicle,a position sensorless control system based on FOC-DTC hybrid control system is proposed.Firstly,considering the advantages of FOC and DTC,the FOC-DTC hybrid control system is constructed to improve the stability and robustness of the system.Then,the field weakening control technology is integrated to improve the control performance of the motor at high speed.Finally,the sliding mode observer is used to estimate the motor speed based on the current information of the αβ axis,so as to realize the PMSM control system without position sensor.The simulation results show that the proposed system can accurately and stably control the motor speed,which is feasible and effective.%针对电动汽车中永磁同步电机(PMSM)的高效控制问题,提出一种基于磁场定向控制-直接转矩控制(FOC-DTC)混合系统的无位置传感器控制系统.首先,在考虑FOC和DTC的各自优势下,构建FOC-DTC混合控制系统,提高系统的稳定性和鲁棒性.然后,融入弱磁控制技术,提高电机高速运行时的控制性能.最后,利用滑模观测器,根据电机αβ轴的电流信息来估计电机转速,实现无位置传感器的PMSM控制系统.仿真结果表明,提出的系统能够准确且稳定地控制电机转速,具有可行性和有效性.