摘要
电力电子系统中,双随机调制技术能够有效地抑制和减小传导电磁干扰(EMI),而不需增加额外耗费。通过对随机调制开关函数中引入不同的随机分布规律,分析了功率变换器输入电流的谱估计,结果表明应用随机调制技术时,不同的随机分布规律对电力电子系统的EMI特性影响不大;变换器在应用双随机PWM技术时,选择简单的均匀分布规律,可以减少控制系统资源的耗费,通过随机程度参数的调节可以方便地使电力电子系统获得更好的电磁兼容性。
In power electrical system, dual randomized modulation technology can restrain and decrease conduct EMI effectively. This paper deals with the spectrum estimation of power converter＇s input current by drawing in different probability distribution laws in dual randomized modulation switch function. The study indicates that random distribution laws affect the characteristic of EMI little using dual randomized modulation technology. Uniform distribution law is simple and effective while dual randomized PWM is applied in power converter. At the same time, better EMI characteristics of system can be achieved expediently by adjusting parameters of stochastic level.
出处
《电力学报》
2005年第2期96-98,103,共4页
Journal of Electric Power
基金
湖北省教育厅青年基金项目(2004Q002)
