一种新颖的分段连续控制SVPWM过调制算法

A Novel Subsectional Continuous Control Strategy of SVPWM Inverter in Overmodulation Region

提出了一种基于角度控制的分段连续SVPWM过调制算法。该算法突破了两个阶段的限制,不需要存储大量的计算数据,能够使逆变器平滑地从线性调制状态过渡到六阶梯波工作状态,非常适合数字化应用,并且具有良好的线性增益。分析了应用该算法以后逆变器输出电压中谐波畸变(THD)的情况,以及主要谐波成分百分含量的变化情况。实验证明该算法非常适合异步电机实际应用。

This strategy, which is based on angel control, breaks through the limitation of two-mode control and can manage the transition from the linear control range to six-step operation smoothyl. It is suitable for a very simple practical digital implementation and the gain characteristic results almost linear, avoiding the necessity of a lookup table implementation. In addition, harmonic components and total harmonic distortion （THD） of the output voltage are analyzed. Experimental results, obtained by DSP board, are also included in this paper.