传统的空间矢量脉宽调制( SVPWM) 在正交坐标系中实现时，涉及的计算量较大，相应的过调制算法更为复杂． 为了更利于实时操作，文中分析了60°坐标系下SVPWM算法的特点，提出了一种计算量小，易于实现的过调制算法． 该算法能统一处理参考电压矢量整个调制区域，不需要计算保持角． 在六阶梯波模式中，该算法不需要计算参考电压实际角度来选取基本电压矢量，仅需要根据原来没有过调制处理时计算得到的基本电压矢量作用时间做出选择． 理论分析和实验结果证明该算法能节省大量计算时间．

When the traditional space vector pulse width modulation( SVPWM) is performed in the orthogonal coordinatesystem,the computational burden is more heavy and the corresponding over-modulation algorithm is morecomplex.For the purpose of facilitating the real-time operation,by analyzing the characteristics of SVPWM algorithmbased on a 60° coordinate system,this paper proposes a novel over-modulation algorithm which is easy to implementwith a small amount of computation.This algorithm can incorporate the whole modulation area of thereference voltage vector without calculating the maintain angle.In the six-step mode,this algorithm can choose thebasic voltage vector only according to the charging time of the basic voltage vector without over-modulation,whichneeds no calculation of the phase angle of the reference voltage.Theoretical analysis and experimental results showthat the proposed algorithm can save a lot of computing time.