Design of GaN-based MHz totem-pole PFC rectifier
Design of GaN-based MHz totem-pole PFC rectifier
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DOI：
10.1109/ecce.2015.7309755
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发表时间：
2015-09
期刊：
影响因子：
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通讯作者：
Zhengyang Liu;F. Lee;Qiang Li;Yuchen Yang
中科院分区：
文献类型：
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作者：
Zhengyang Liu;F. Lee;Qiang Li;Yuchen Yang
图腾柱无桥功率因数校正 (PFC) 整流器最近被认为是服务器和电信电源等应用的有前途的前端候选者。本文首先讨论了新兴高压氮化镓 (GaN) 器件所带来的图腾柱 PFC 整流器相对于传统 PFC 整流器的优势。图腾柱 PFC 整流器采用临界模式操作，以实现高频和高效率。然后介绍了几个高频问题和详细的设计考虑因素，包括整个线路周期 ZVS 操作的零电压开关 (ZVS) 扩展；用于过零失真抑制的可变接通时间策略；和用于消除纹波电流的交错控制。还介绍了差模 (DM) 电磁干扰 (EMI) 滤波器的体积减小显着受益于 MHz 高频操作和多相交错。最后，展示了基于 GaN 的 1.2kW MHz 图腾柱 PFC 整流器，其峰值效率为 99%，功率密度为 200W/in3。
Totem-pole bridgeless power factor correction (PFC) rectifier is recently recognized as a promising front end candidate for applications like server and telecommunication power supply. In this paper the advantage, enabled by emerging high-voltage gallium-nitride (GaN) devices, of totem-pole PFC rectifier comparing to traditional PFC rectifier is discussed in the beginning. Critical mode operation is used by the totem-pole PFC rectifier in order to achieve both high frequency and high efficiency. Then several high frequency issues and detailed design considerations are introduced including zero-voltage-switching (ZVS) extension for entire line-cycle ZVS operation; variable on-time strategy for zero-crossing distortion suppression; and interleaving control for ripple current cancellation. The volume reduction of differential-mode (DM) electro-magnetic interference (EMI) filter significantly benefited from MHz high frequency operation and multi-phase interleaving is also presented. Finally, a 1.2kW GaN-based MHz totem-pole PFC rectifier is demonstrated with 99% peak efficiency and 200W/in3 power density.