文档介绍：基于同步旋转非正交坐标系的五电平SVPWM算法研究
胡叶民
(浙江丽水学院工程与设计学院,浙江丽水 323000)
摘要:介绍了NPC/H桥五电平逆变器的拓扑结构和工作原理,研究了一种基于同步旋转非正交坐标系的五电平SVPWM算法。该算法将静止的直角坐标系变换为与参考电压矢量所在扇区保持同步的旋转非正交坐标系,扇区判断方法简单,参考电压矢量的位置可以用一组公式快速确定,基本电压矢量作用时间公式统一、简便,克服了传统五电平SVPWM算法计算量大、实时性差和不易向更高电平推广的缺点。实验结果验证了该算法的有效性。
关键词:NPC/H桥五电平逆变器;同步旋转非正交坐标系;SVPWM
A five-level SVPWM algorithm based on synchronously rotating non-orthogonal coordinate
HU Ye-min
(Zhejiang Lishui College,Lishui 323000,Zhejiang,China)
Abstract: The topology and working principle of NPC/H-bridge five-level inverter are introduced, and a five-level SVPWM algorithm based on synchronously rotating non-orthogonal coordinate is studied. This algorithm transforms the static Cartesian coordinate to rotary non-orthogonal coordinate which keeps pace with the sector the reference voltage vector located. Sector judgment method is simple; the accurate location of the reference voltage vector can be fast confirmed by using a group formula, and the formulae to calculate the duration of each basic voltage vector is uniform and handy. It can conquer the ings of the traditional five-level SVPWM algorithm, such as, large amount calculation, bad real-time and difficult to apply to higher level. The effectiveness of the algorithm is demonstrated by the experimental results.
Key words: NPC/H-bridge five-level inverter; synchronously rotating non-orthogonal coordinate; SVPWM
1 引言
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