In this study,a type of multilevel flying capacitor bridgeless PFC converter is proposed that permits the use of economical and efficient 100 V GaN transistors.Compared with the popular two-level totem-pole bridgeless...In this study,a type of multilevel flying capacitor bridgeless PFC converter is proposed that permits the use of economical and efficient 100 V GaN transistors.Compared with the popular two-level totem-pole bridgeless PFC converters achieved using the much more expensive 650 V GaN devices,this new design has several distinct advantages:lower component costs,lower dv/dt,lower power losses,and reduced concerns about device reliability.A 1.6 kW,5-level PFC converter prototype is designed and fabricated with an efficiency of 99.18%and a power factor of 0.99,which are experimentally demonstrated.The operation principle,design considerations,control strategy and experimental results are discussed.展开更多
基金Supported by the National Natural Science Foundation of China(51977068).
文摘In this study,a type of multilevel flying capacitor bridgeless PFC converter is proposed that permits the use of economical and efficient 100 V GaN transistors.Compared with the popular two-level totem-pole bridgeless PFC converters achieved using the much more expensive 650 V GaN devices,this new design has several distinct advantages:lower component costs,lower dv/dt,lower power losses,and reduced concerns about device reliability.A 1.6 kW,5-level PFC converter prototype is designed and fabricated with an efficiency of 99.18%and a power factor of 0.99,which are experimentally demonstrated.The operation principle,design considerations,control strategy and experimental results are discussed.
