ZVS全波型软开关降压转换器的性能分析及电磁噪声减低研究  

Performance analysis and EMI reduction of ZVS full-wave soft switching buck converter

作　　者：孙逸菲 刘腾飞 宗学军 何戡 连莲 SUN Yifei;LIU Tengfei;ZONG Xuejun;HE Kan;LIAN Lian(School of Information Engineering,Shenyang University of Chemical Technology,Shenyang 110142,China)

机构地区：[1]沈阳化工大学信息工程学院,辽宁沈阳110142

出　　处：《电子设计工程》2024年第24期52-57,共6页Electronic Design Engineering

基　　金：辽宁省教育厅高校科研基金(LJKQZ20222453)。

摘　　要：软开关技术具有快速动态响应、高稳定性、易控制、低损耗等特点,广泛应用于开关电源设备中。然而,功率开关期间快速的电流、电压转换对软开关降压转换器的传导噪声仍然有很大影响。针对上述问题,提出一种新型ZVS(Zero Voltage Switching)全波型软开关降压转换器拓扑,分析了此转换器的稳定性,运用扩展频谱时钟技术,采用调制谐振上升沿时间方法,不仅降低了转换器输出纹波,而且有效降低了转换器的电磁干扰(ElectroMagnetic Interference,EMI)噪声,通过仿真试验验证了该转换器的性能,与硬开关相比,EMI减低了22 dB,输出纹波减小到4.7 mV。Soft switching technology has the characteristics of fast dynamic response,high stability,easy control and low loss.It is widely used in switching power supply equipment.However,the rapid current and voltage conversion during power switching still has a great influence on the conduction noise of soft switching buck converter.Aiming at this problem,a novel ZVS full-wave soft switching buck converter topology is proposed,the stability of this converter is analyzed.By using the spread spectrum clock technique and modulating the resonant rising edge time method,not only reduces the output ripple,but also effectively reduce the ElectroMagnetic Interference(EMI)Noise of the full-wave soft switching buck converter.The simulation results verified that compared with the hard-switching converter,the EMI of this converter is reduced by 22 dB,and the output ripple decrease to 4.7 mV,which is very small.

关 键 词：ZVS全波型 软开关降压转换器 电磁干扰 扩展频谱时钟技术 

分 类 号：TN78[电子电信—电路与系统]