摘要
随着开关电源工作频率的不断提高,所产生的电磁干扰(EMI)对其自身及附近电子设备的正常工作造成了严重影响,由此产生的尖峰电压甚至可以击穿开关管。此处以移相全桥倍流整流变换器为研究对象,在研究传导干扰产生机理和流通路径基础上设计了全桥开关管零电压开关(ZVS)缓冲电路,并建立了传导干扰测试模型,比较了ZVS和硬开关(HS)条件下传导干扰影响,并详细分析了ZVS在特定频段内对共模和差模干扰的抑制效果。仿真实验结果表明,ZVS对共模干扰抑制平均衰减10 dBμV,对差模干扰的抑制效果更明显,总体改善了变换器传导干扰的影响。最后搭建了电源实验平台,通过实验验证了设计方法的可行性。
The electromagnetic interference(EMI)generated by the continuous increasing working frequency of the switching power supply has a serious effect on its own and the normal operation of the nearby electronic equipment,and the resulting peak voltage can even break through the switching tube.Phase shift full bridge double current rectifier converter is studied,the whole bridge switch tube zero voltage switch(ZVS)buffer circuit is designed based on the conducted interference mechanism and flow path.Then the conducted interference test model is established,and the effect of conducted interference under the condition of ZVS and hard switching(HS)is compared,meanwhile the suppression effect of ZVS within the specific frequency band of common mode and differential mode interference is analyzed in detail.The simulation results show that ZVS has average attenuation of 10 dBμV for common mode interference suppression,and has significant suppression effect for differential mode interference,which overall improves the conducted interference of converter.Finally,the experimental platform of switching power supply is built,and the feasibility of the design method is verified by experiments.
作者
汶涛
诸文智
张超
殷万君
WEN Tao;ZHU Wen-zhi;ZHANG Chao;YIN Wan-jun(Xidian University,Xi'an 710071,China)
出处
《电力电子技术》
CSCD
北大核心
2021年第7期15-18,共4页
Power Electronics
基金
中央高校基本科研业务费专项资金(JB210405)
四川省教育信息化应用与发展研究中心2020年度资助项目(JYXX20-014)。
关键词
开关电源
零电压开关
传导干扰
switching power supply
zero voltage switch
conducted interference
作者简介
汶涛(1987-),男,讲师,研究方向为电力电子与电磁兼容。
