中文摘要：

针对含零矢量的永磁同步电机直接转矩控制（PMSM-DTC）系统,在磁链圆扇区分界线处弧段出现磁链畸变、幅值调节迟缓的问题,从电压矢量与磁链的数学关系入手,根据零矢量所特有性质,分析了有效矢量和零矢量对磁链调节的影响,阐述了出现该问题的根本原因,指出零矢量在扇区分界处应用的一些缺陷,提出一种部分区域替代零矢量的解决办法。该方法将磁链圆均分为18个扇区,通过选择最优电压矢量替代扇区分界处的零矢量,从而使该区域更具可调控性,使用了Matlab/Simulink建立了相应的仿真模型,最后对上述理论分析进行了实验验证。研究结果显示：该方案可有效改善磁链和转矩波形,为进一步研究提供了相应依据。

英文摘要：

Aiming at the problem of that,in containing zero vector PMSM-DTC system,the flux linkage distortion and flux linkage amplitude adjustment slowly around flux linkage circle sector boundary angle. According to the character of the zero vector,the relationship between voltage vector with flux linkage was analyzed,the root cause of this problems was elucidated,some shortcomings that zero vector applied in sector boundaries was pointed out,a solution of alternative zero vector that around the sector boundary angle areas was put forward. This method,flux circle was divided into 18 sectors,then,by choosing the optimal voltage vector to replace zero vector that around sector boundary Angle area,this region adjustment was made more flexible. In the paper,simulation model was establish used Matlab/simulink to the corresponding,experimental verification of the above theoretical analysis. The results shows that this scheme can effectively improve the flux and torque waveforms,and to provide corresponding basis for further research.