基于永磁体多因素观测器的防退磁控制系统研究

Research on Anti-Demagnetization Control System Based on Multi-Factors Permanent Magnet Observer

针对高密度永磁同步电动机在运行中可能存在退磁现象,设计了基于永磁同步电动机永磁体多因素观测器的防退磁控制系统。该多因素观测器为基于永磁同步电动机永磁体温度、电枢d轴、q轴电流,利用有限元计算方法得出的多因素观测器,并通过热网络模型以及基于运行参数的损耗分析,解决了在运行中对永磁体温度的观测问题。同时基于该观测器进行了矢量控制系统设计,证明该系统有助于防止永磁体发生不可逆退磁。

Aimed at the possible demagnetization phenomenon of the high density permanent magnet motor （PMM）,anti-demagnetization control system based on multi-factors permanent magnet observer of vehicle PMM was designed.This observer was based on the temperature of permanent magnet,d-axis and q-axis armature current of PMM and got by finite element method.And temperature observation of the permanent magnet was solved by the thermal network modal and loss analysis of PMM in the operating parameters.The vector control strategy based on multi-factors permanent magnet observer was presented.The experiment results prove that this control system has the positive application value to improve the reliability of the PMM control system.