随机SPWM抑制电磁噪声的研究  

Research on Random Frequency SPWM Suppression of Electromagnetic Noise

作　　者：杜冲[1] 章穗[1] 赵熙临[1] 

机构地区：[1]湖北工业大学电气与电子工程学院,湖北武汉430068

出　　处：《湖北工业大学学报》2012年第5期61-64,共4页Journal of Hubei University of Technology

摘　　要：在恒定三角载波频率的SPWM控制策略的基础上,针对开关频率高速变化,引起强烈的电磁干扰问题,提出一种基于Lorenz变载波频率的SPWM控制方法,利用随机变化的低噪声特性平滑高次谐波能量,达到抑制EMI的目的.利用MATLAB进行仿真,仿真结果达到了预期的控制效果.A control method was proposed based on the change of the carrier frequency Lorenz SPWM,in which the constant frequency triangle carrier SPWM control strategy is a foundation.In the proposed scheme the EMI suppression was charged by random changes in the high-low-noise characteristics of smooth harmonic energy,thus the electromagnetic interference caused by the frequency changes of high speed switching could be solved.The MATLAB simulation results show that it has achieved the expected effect.

关 键 词：Lorenz随机序列 电磁干扰 随机SPWM 

分 类 号：TM391.9[电气工程—电机]