摘要
定子磁链的准确观测对于DTC系统十分重要。针对传统U-I模型观测磁链时直流分量造成积分漂移的问题,存在两种常用的方法来改进磁链观测器:一阶低通滤波器和幅值限定补偿积分器。分析得知,在DTC系统中基于幅值限定补偿的积分器可以观测到更准确的磁链值。在d SPACE平台下分别搭建不同磁链观测器的DTC仿真模型,实现永磁同步电机的实时控制。结果表明,基于幅值限定补偿的磁链观测器较低通滤波器提高了观测精度。
The accurate observation of the stator flux is very important in DTC system. For the problem of integrator drifting due to DC offset in computing stator flux using the U-I model,there were two common methods to improved flux observer： the first-order low-pass filter and the amplitude limited compensation integrator. Analysis indicates that amplitude limited compensation integrator can get more accurate flux values in DTC system. Several different flux observers of DTC simulation models were respectively established in d SPACE system to realize real-time control of PMSM. The results show that the amplitude limited compensation integrator can improve the accuracy of flux observer compared with first-order low-pass filter.
出处
《微特电机》
北大核心
2015年第2期35-38,共4页
Small & Special Electrical Machines
基金
四川省科技厅支撑计划项目(2013GZX0150)
