基于混沌反控制降低Buck型变换器EMI及纹波研究  

Research on Reducing EMI and Output Voltage Ripple of Buck Converter Based on Anti-control of Chaos

作　　者：吴振军[1] 胡智宏[1] 崔光照[1] 

机构地区：[1]郑州轻工业学院电气信息工程学院,郑州450002

出　　处：《系统仿真学报》2008年第4期993-996,共4页Journal of System Simulation

摘　　要：开关模式电源通常会产生电磁干扰。利用混沌能够降低开关模式电源的EMI(Electromagnetic interference),但会引起较大的输出电压纹波。基于新的电压反馈扰动方法可使Buck变换器工作在混沌状态,改善电感电流频谱分布,降低频谱峰值,使之满足EMI要求。Pspice仿真结果表明:该混沌反控制方法不仅能够有效的降低Buck型变换器的EMI水平,并且能够明显降低输出电压纹波。Switching mode supplies usually emit electromagnetic interferences （EMI） at switching frequency and its harmonics. Making these systems worked on chaotic state can reduce EMI, but may induce higher output voltage ripple. Based on a new voltage feedback strategy, Buck converters could work at chaotic state. So power spectrum of inductance current was improved, the peak values at switching frequency and its harmonics were decreased. Pspice simulation result illustrates that this chaos anti-control strategy not only improves the EMC of Buck converters, but also reduces the output voltage ripple obviously.

关 键 词：混沌反控制 功率谱 电磁干扰 输出电压纹波 

分 类 号：TM46[电气工程—电器]