双三相永磁同步电机在混合储能系统中的转矩分配控制策略

Torque Distribution Control Strategy of Dual Three-phase Permanent Magnet Synchronous Motor in Hybrid Energy Storage System

针对电动汽车航能力差、电机控制不稳定的问题,将双三相永磁同步电机应用于电动汽车上,并设计了一种基于混合储能系统(HESS)的多相电机转矩分配控制策略。首先,利用矢量控制方式对永磁同步电机转矩与定子磁通之间的关系进行分析,得出转矩矢量表达式。其次,基于磁通和转矩的增量,提出了绕组去耦补偿、磁通观测和参数辨识方法,通过磁通参考值与磁通观测器之间的误差计算电压参值。最后,采用Matlab/Simulink软件对所提出的永磁同步电机控制系统进行仿真实验与分析。仿真结果表明:在所提控制策略下,系统负载转矩具有较强的抗干扰能力和良好的稳态性能;且具良好的电流控制效果,可在允许范围内逐步减弱至平衡状态。

Aiming at the problem that the permanent magnet synchronous motor has excessive start-up current and speed overshoot during low-speed operation under the traditional vector control mode,a hybrid energy storage system multi-phase motor torque distribution control strategy was designed.First,the vector control method was used to analyze the relationship between the torque of the permanent magnet synchronous motor and the stator flux,and the torque vector expression was obtained.Secondly,based on the increment of magnetic flux and torque,winding decoupling compensation,magnetic flux observation and parameter identification methods were proposed,and the voltage parameter was calculated by the error between the magnetic flux reference value and the magnetic flux observer.Finally,Matlab/Simulink software was used to simulate and analyze the proposed permanent magnet synchronous motor control system.The simulation results show that:under the proposed control strategy,the system load torque has strong anti-interference ability and good steady-state performance;and has a good current control effect,which can gradually weaken to the equilibrium state within the allowable range.