[关键词]
[摘要]
在双三相永磁同步电机(PMSM)电动助力转向(EPS)系统低速段无位置传感器冗余控制中,传统高频脉振电压注入法依赖于电机凸极效应,因而存在位置相关信号的信噪比很小的固有问题。从αβ两相静止坐标系提取高频电流响应信号,直接调制静止两相高频电流,使位置角估算只与直轴电感值相关。将该方法用于饱和凸极性较小的表贴式双三相PMSM。通过仿真和试验验证了所提方法的有效性和正确性。
[Key word]
[Abstract]
In the lowspeed sensorless redundant control of dual threephase permanent magnet synchronous motor (PMSM) electric power steering (EPS) system, there was an inherent problem that the signaltonoise ratio of the positiondependent signal was small due to the salient effect of the motor for the conventional strategy based on highfrequency pulsating voltage injection method. To solve this problem, the highfrequency current response was extracted from the αβstationary reference frame, and the αβhighfrequency current modulation was directly applied, so that the position angle estimation was only related to the directaxis inductance value. This method was applied to a surfacemounted dual threephase PMSM with a small saturation polarity. The effectiveness and correctness of the proposed method were verified by simulation and experiment.
[中图分类号]
TM 301.2
[基金项目]