一种扩展SVPWM线性调制区及过调制算法实现  

Realization of Expend Linear Modulation Area and Overmodulation Algorithm in SVPWM

作　　者：梁伟华[1] 郗晓田[1] 游林儒[1] 黄招彬[1] 

机构地区：[1]华南理工大学,自动化学院,广东广州510640

出　　处：《电力电子技术》2013年第5期10-12,共3页Power Electronics

摘　　要：最小脉宽限制减少了空间矢量脉宽调制(SVPWM)的线性调制区,过调制技术能提高逆变器输出基波电压。相对六阶梯波运行状态,七段式脉宽调制(PWM)直流电压利用率不高。提出平滑切换到五段式PWM的方法,能扩大线性调制区并实现过调制。其优点是算法简单易用,无需计算切换角度或查表。在Matlab/Simulink仿真软件和永磁同步电梯曳引机上进行实验,结果表明理论分析正确。Minimum pulse-width limitations decrease the linear modulation area of space vector pulse width modulation （SVPWM）.Output fundamental voltage can be increased by means of overmodulation.Compared to six-step mode,sevensegment pulse width modulation（PWM） is lack in DC voltage use ratio.This method smoothly switches over to five-segment PWM ,which expends linear modulation area and realizes overmodulation.Its advantage is easy to apply.No need to compute switch-angle or look-up table.Simulation in Maflab/Simulink and experimental results verify the correctness of the theoretical analysis.

关 键 词：空间矢量脉宽调制 过调制 电压利用率 

分 类 号：TN787[电子电信—电路与系统]