车用永磁同步电动机电流环偏差解耦控制系统

Current Loop Deviation Decoupling Control System of Permanent Magnet Synchronous Motor in Vehicle Application

以永磁同步电动机矢量控制为基础,分析了转子谐波磁通和电动机参数变化对电流控制器性能的影响。并通过复矢量模型,指出高速下耦合电压使得电流控制性能恶化。针对励磁电流分量和转矩电流分量之间的交叉耦合问题,提出了一种偏差解耦控制方法,并与传统的反馈解耦控制进行了仿真和实验对比。结果表明,所提偏差解耦控制方法实现了宽调速范围内的电流解耦控制,具有很好的参数鲁棒性和扰动抑制能力。

Based on rotor field oriented vector control system for permanent magnet synchronous motors（PMSM）,rotor harmonic flux and motor parameters and the way they affect current controller performance were analyzed.The coupled voltages deteriorated current controller performance in high speed.This was because the field current component and torque current component could not be decoupled completely in rotor field oriented vector control.According to series decoupling theory,a deviation decoupling method was proposed.The feedback decoupling control and the proposed deviation decoupling control were contrastive analyzed.Simulation and experimental results showed that the deviation decoupling algorithm was robust against parameter changes,and could suppress harmonic disturbances.It had a good decoupling ability in high speed.