Flyback converters in consumer and commercial products must adhere to strict regulatory standards for conducted and radiated electromagnetic interference(EMI).Managing EMI has become increasingly complex in mod-ern po...Flyback converters in consumer and commercial products must adhere to strict regulatory standards for conducted and radiated electromagnetic interference(EMI).Managing EMI has become increasingly complex in mod-ern power electronics,particularly with the integration of high-speed wide bandgap(WBG)devices into compact sys-tem layouts.A review of established modeling techniques and mitigation strategies for conducted EMI is presented,fo-cusing on differential mode(DM)and common mode(CM)noise,alongside radiated EMI in flyback converters.The discussion encompasses solutions at both component-level design and converter system optimization.展开更多
提出一种基于Boost拓扑与反激拓扑有机组合思想的Boost-Flyback变换器,Boost环节与反激环节共用输入支路,使电感–变压器的漏感能量得以利用,消除了漏感损耗,并实现了开关管电压钳位,减小了开关管电压应力;Boost与反激环节的输出支路串...提出一种基于Boost拓扑与反激拓扑有机组合思想的Boost-Flyback变换器,Boost环节与反激环节共用输入支路,使电感–变压器的漏感能量得以利用,消除了漏感损耗,并实现了开关管电压钳位,减小了开关管电压应力;Boost与反激环节的输出支路串联,实现了高电压增益;Boost-Flyback变换器输入并联输出串联,进一步提高了变换器的电压增益,同时减小了输入输出电压及电流纹波。提出新拓扑的DCM-ZVS工作模式控制方法,并在开环方式下实现了输出功率的控制。详细分析拓扑的工作原理、电压增益特性及控制方法。通过230 W 30 V/380 V的实验样机验证理论分析的有效性。展开更多
文摘Flyback converters in consumer and commercial products must adhere to strict regulatory standards for conducted and radiated electromagnetic interference(EMI).Managing EMI has become increasingly complex in mod-ern power electronics,particularly with the integration of high-speed wide bandgap(WBG)devices into compact sys-tem layouts.A review of established modeling techniques and mitigation strategies for conducted EMI is presented,fo-cusing on differential mode(DM)and common mode(CM)noise,alongside radiated EMI in flyback converters.The discussion encompasses solutions at both component-level design and converter system optimization.
文摘提出一种基于Boost拓扑与反激拓扑有机组合思想的Boost-Flyback变换器,Boost环节与反激环节共用输入支路,使电感–变压器的漏感能量得以利用,消除了漏感损耗,并实现了开关管电压钳位,减小了开关管电压应力;Boost与反激环节的输出支路串联,实现了高电压增益;Boost-Flyback变换器输入并联输出串联,进一步提高了变换器的电压增益,同时减小了输入输出电压及电流纹波。提出新拓扑的DCM-ZVS工作模式控制方法,并在开环方式下实现了输出功率的控制。详细分析拓扑的工作原理、电压增益特性及控制方法。通过230 W 30 V/380 V的实验样机验证理论分析的有效性。
