99% Efficient 2.5-kW Four-Level Flying Capacitor Multilevel GaN Totem-Pole PFC
99% Efficient 2.5-kW Four-Level Flying Capacitor Multilevel GaN Totem-Pole PFC
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DOI：
10.1109/jestpe.2021.3051207
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发表时间：
2021-10
影响因子：
5.5
通讯作者：
Qingyun Huang;Qingxuan Ma;Pengkun Liu-;A. Huang;M. D. de Rooij
中科院分区：
文献类型：
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作者：
Qingyun Huang;Qingxuan Ma;Pengkun Liu-;A. Huang;M. D. de Rooij
本文分析、设计并测试了一种采用200v GaN器件的高效高密度2.5 kW四电平飞容多电平（FCML）图腾杆无桥功率因数校正（PFC）整流器。这款2.5 kW四电平连续传导模式（CCM） GaN图腾极PFC工作在360 kHz电流纹波频率下，显着减小了电感尺寸，同时保持了非常低的开关损耗。本文比较了具有相同纹波频率（360 kHz）的四电平和二电平CCM GaN图腾柱PFC的器件损耗，表明四电平CCM GaN PFC的器件损耗要小得多。此外，本文还详细介绍了一种基于商用复合电感的紧凑、低轮廓矩阵电感的设计。本文还介绍了一种高密度低损耗飞行电容器的设计。本文开发并测试了一个开关频率为120 kHz（纹波电流频率为360 kHz）的2.5 kW四电平FCML GaN图腾极PFC样机。测试的峰值效率为99.25%。PFC系统功率密度为104 W/in3，无散热器，强制风冷。
In this article, a high-efficiency and high-density 2.5 kW four-level flying capacitor multilevel (FCML) totem-pole bridgeless power-factor-correction (PFC) rectifier with 200 V GaN devices is analyzed, designed, and tested. This 2.5 kW four-level continuous conduction mode (CCM) GaN totem pole PFC operates with 360 kHz current ripple frequency which significantly reduces the inductor size while keeping a very low switching loss. This article compares the device loss of the four-level and two-level CCM GaN totem-pole PFC with the same ripple frequency (360 kHz) and shows that the four-level CCM GaN PFC has much less device loss. In addition, this article introduces the detailed design of a compact and low-profile matrix inductor based on the commercial composite inductors. This article also introduces the design of a high-density and low-loss flying capacitor. A 2.5 kW four-level FCML GaN totem-pole PFC prototype with 120 kHz switching frequency (360 kHz current ripple frequency) is developed and tested in this article. The tested peak efficiency is 99.25%. The PFC system power density is 104 W/in3, without a heatsink and with forced air cooling.