开关变换器的双频率PWM调制技术研究  

Bi-frequency PWM Modulation Technique of Switching DC/DC Converters

作　　者：兰燕妮[1] 王金平[1] 高玉[1] 许建平[1] 

机构地区：[1]西南交通大学,四川成都610031

出　　处：《电力电子技术》2010年第7期79-80,共2页Power Electronics

基　　金：国家自然科学基金资助项目(50677056)~~

摘　　要：提出了开关变换器的双频率PWM调制(Bi-frequency Pulse Width Modulation,简称BF-PWM)技术,分析了其工作原理和调制特性,利用PSPICE对双频率PWM调制Buck变换器进行了仿真,并与传统PWM调制Buck变换器的仿真结果进行了比较。仿真和实验结果表明,双频率PWM调制方法具有比传统PWM调制方法优异的抑制电磁干扰(Electro-magnetic Interference,简称EMI)性能。A novel modulation technique,bi-frequency pulse width modulation（BF-PWM）techniquef,or switching DC/DC converters is proposed and investigated.PSPICE simulation of BF-PWM Buck converter is performed and compared with the conventional pulse width modulation（PWM）Buck converter.Simulation and experimental results show that BF-PWM Buck converter benefits better electromagnetic interference（EMI）performance compared with PWM Buck converter.

关 键 词：变换器 脉宽调制 电磁干扰 

分 类 号：TM46[电气工程—电器] TN787[电子电信—电路与系统]