考虑非线性的永磁同步电机电流环分析

为提高永磁同步电机的动态性和鲁棒性,对非线性的永磁同步电机电流环进行分析。从永磁同步电机的数学模型入手,利用分析工具Matlab对电流环的开环传递函数进行近似线性化。画出不同转速下开环传递函数的伯德图以分析电枢反应和反电势对电流跟踪效果的影响,并基于Matlab/Simulink永磁同步电机转速控制模型进行仿真验证。分析结果表明:针对选定的永磁同步电机,电枢反应主要对电流环的动态响应产生不利影响且随着转速增加影响增大,而反电势则主要对电流环的稳态误差产生影响且与转速无关。

Current Loop Analysis of PMSM Considering the Nonlinearity

In order to improve the dynamic characteristic and robustness of the permanent magnet synchronous motor （PMSM）, analyze the nonlinear PMSM current loop. Carry out approximate linearization of the open loop transfer function of current loop based on the PMSM model in coordinate system by using the analysis tool Matlab. And drawing the bode diagrams at several different speed points to analyze the effects on current tracking of armature reaction and EMF, and the simulink of PMSM speed control model based on Matlab/Simulink verifies the conclusion. By analyzing the appointed PMSM, armature reaction will influence the dynamic reaction of current loop, and the influence will be more serious if the speed increases; EMF has an influence on the steady state of current loop which is independent of the speed.