非对称坐标系下SVPWM调制算法  

SVPWM Algorithm Based on Non-orthogonal Coordinates

作　　者：马帅旗[1] 张鹏超[1] 

机构地区：[1]陕西理工大学电气工程学院,陕西汉中723000

出　　处：《系统仿真学报》2017年第6期1218-1222,共5页Journal of System Simulation

基　　金：陕西省科技厅工业攻关项目(2016GY-070)

摘　　要：针对空间矢量脉宽调制算法需要进行复杂三角函数运算问题,提出了一种非正交坐标系下SVPWM优化算法。该算法通过Clark变换、非对称坐标系变换和标幺化等处理,简化了参考矢量在六边形大扇区、第I扇区中小三角形区域判断,优化了基本工作矢量的作用时间计算,并将其它5个大扇区内参考矢量的区域判断和作用时间计算映射至第I扇区,实现区域判断和作用时间计算的归一化处理。该算法可以有效地减少SVPWM算法的运算量,降低开关频率,减小开关损耗。仿真结果验证了设计方法的有效性和正确性。As to the issue of complex trigonometric calculation for conventional SVPWM modulation algorithms, an SVPWM optimization algorithm in non-orthogonal coordinate system was proposed. By using Clark, Non-orthogonal Coordinate and per unit transformation, the algorithm simplified the regional judgment of reference vector in the sectors and triangle and optimized the calculation of basic vector action time. It realized normalization of three vectors times by using a normalization algorithm for mapping other sectors to 1sector. The algorithm can effectively reduce the amount of SVPWM algorithm calculation, switching frequency, and switching losses. Simulation results show that the algorithm is effectiveness and correctness.

关 键 词：三电平逆变器 空间矢量脉宽调制 标幺化 非正交坐标系 

分 类 号：V241[航空宇航科学与技术—飞行器设计]