A Novel 5-level Flying Capacitor Bridgeless PFC Converter Based on Cost-effective Low-voltage eGaN FETs

• 来源期刊: 中国电气工程学报（英文）
• 年，卷（期）: 2020,（3）
• 所属期刊栏目: Special Issue Papers
• 页码范围: 56-64
• 页数: 9页
• 语种: 英文
• DOI: 10.23919/CJEE.2020.000019

摘要

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.