摘要
为提高逆变器直流母线电压利用率,提高高速弱磁下电机的输出功率,扩展电机运行范围,提出了一种基于叠加原理的空间矢量脉宽调制(SVPWM)过调制算法。与传统两阶段过调制算法相比较,易于数字化实现,能够实现从线性调制区到六拍波之间的平滑过渡。详细介绍了该过调制算法的基本原理,进行了仿真和实验。结果表明,该算法下的输出基波电压幅值与调制系数呈线性关系,且输出电压谐波含量与传统方法相比也得到了明显抑制。
A space vector pulse width modulation （SVPWM） over-modulation algorithm was developed based on the superposition principle to increase the DC bus voltage utilization ratio, raise the output power in regions of flux weakening, and expand the operation range of induction machines. The digital method is easier to implement and gives smooth transitions from linear modulation to six-step operation. The over-modulation algorithm is described with simulations and experiments. The results show that the amplitude of fundamental voltage linearly increases with the modulation factor and that the harmonies of the output voltage are markedly redueed.
出处
《清华大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2008年第4期461-464,共4页
Journal of Tsinghua University(Science and Technology)
基金
国家“八六三”高技术项目(2005AA501130)
