基于线性磁链的IPMSM位置预估算法

IPMSM rotor position estimation based on linear flux

摘要:

为了提高内嵌式永磁同步电机(IPMSM)位置预估的估算精度,基于线性磁链的IPMSM模型,用电流观测误差构建滑模平面建立滑模观测器,预估转子位置和速度.定量分析定子电阻和交直轴电感对预估转子位置的影响.针对电机参数摄动对预估位置精度的影响,构造Lyapunov函数辩识定子电阻、交轴电感.实验结果表明该设计方法的正确性和可实现性.

Abstract:

To improve the precision of estimated rotor angle for the interior permanent magnet synchronous motor(IPMSM),this paper presents a novel model based on the linear flux.The rotor position and speed is estimated by the sliding mode observer(SMO) via the current error between the actual current and the estimated current.The effect of stator resistor and inductance on the estimated rotor angle is analyzed quantitatively,and to reduce the effect,Lyapunov function is established to identify stator resistor and inductance.The experimental result shows the validity and reliability of this algorithm.