两种随机PWM调制技术的比较研究  

Comparison and Investigation of Two Randomized PWM Modulation Technology

作　　者：王颢雄[1] 王斌[1] 周丹[1] 黄凯[1] 崔景秀[1] 

机构地区：[1]三峡大学

出　　处：《电气传动》2006年第11期23-25,共3页Electric Drive

摘　　要：PWM调制技术已广泛应用于电力电子技术中,但PWM调制信号含有大量的高次谐波,成为产生EMI的主要原因之一。开关功率变换器中应用随机PWM调制技术能有效地减小传导EMI,改善系统电磁兼容性。常用的随机PWM调制技术有随机周期调制和随机脉冲位置调制,通过对两种方法的分析与实验,结果表明随机周期调制技术具有相对更好地减小EMI的作用。Though PWM modulation technology has already been used in power converter abroad, it becomes a main reason which can produces EMI because PWM modulation signal contains abundant high harmonic. It can reduce conduct EMI effectively and improve EMC of system to use randomized PWM modulation. There are two common randomized modulation which is randomized period modulation and randomized pulseposition modulation. Analysis and experimentation indicates that randomized period modulation has better effect to reduce EMI than randomized pulse-position modulation.

关 键 词：电磁干扰 随机周期调制 随机脉冲位置调制 

分 类 号：TN761[电子电信—电路与系统]