两种基于Markov链随机调制技术的比较研究  

Compare and Study of Two Randomized Modulation Based on Markov Chains

作　　者：王颢雄[1] 王斌[1] 

机构地区：[1]三峡大学

出　　处：《电气传动》2006年第1期37-40,共4页Electric Drive

摘　　要：电力电子功率变换器中应用随机调制技术能有效地减小传导EN I,但会引起变换器输出电压纹波峰-峰值增加和精度降低,将M arkov链引入到随机调制技术中可有效地解决这个问题。由于M arkov链的状态选择对系统的运行性能和采用数控系统实现算法的实时性和快速性有着重要的影响,通过对两状态M arkov链和3状态M arkov链随机周期调制DC/DC变换器的仿真研究,结果表明3状态M arkov链随机周期调制技术具有更好的特性。Randomized modulation used in power convertor can effectually reduce conduct EMI, while it increases output voltage fluctuate and reduces voltage precision. It can effectively resolve the problem by using randomized modulation based on Markov chains. It can be concluded that the characteristic of three-states Markov chains better than two-states Markov chains＇ randomized period modulation by simulation and analysis of DC/DC.

关 键 词：MARKOV链 随机周期调制技术 EMI/EMC 功率谱密度 电压纹波 

分 类 号：TN761[电子电信—电路与系统] O211.62[理学—概率论与数理统计]