摘要
三相四桥臂逆变器比普通的三相三桥臂逆变器多一个臂对,普通的2D SVM已经无法满足这种逆变器控制的需求。因此提出一种静止abc坐标系下的3D SVM,这种方法不需要坐标变换,计算相对简单。同时,各个开关电压矢量的物理意义十分明确。该文对三相四桥臂逆变器的工作原理进行分析,推导出3D SVM的算法,通过MATLAB/Simulink软件对这种控制方法进行仿真验证。结果表明:在三相平衡负载情况下,三相四桥臂逆变器能够保持良好的动态特性和电压输出特性。
Due to the fact that three-phase four-leg inverter had one more pair of arms than three-phase three-leg inverter,ordinary 2D SVM could no longer meet the controlling requirements of such inverter. Therefore,a 3D SVM in static abc coordinate system was selected. This method did not require coordinate transformation and the calculation was relatively simple. Meanwhile,the physical significance of each switching voltage vector was very clear. This paper analyzed the working principle of the three-phase four-leg inverter,deduced the algorithm of 3D SVM,and verified this kind of controlling method by MATLAB or Simulink software. The results showed that the three-phase four-leg inverter could maintain good dynamic characteristics and voltage output characteristics under the condition of three-phase balanced loads.
引文
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