期刊
2019 IEEE ENERGY CONVERSION CONGRESS AND EXPOSITION (ECCE)
卷 -, 期 -, 页码 4421-4428出版社
IEEE
DOI: 10.1109/ecce.2019.8912203
关键词
GaN; CRM; totem-pole PFC; soft switching; zero current detection (ZCD); current sensing delay
资金
- Intel Corporation
- Engineering Research Center Program of the National Science Foundation
- DOE under NSF [EEC-1041877]
- CURENT Industry Partnership Program
High-frequency soft-switched gallium-nitride (GaN) based critical conduction mode (CRM) totem-pole power factor correction (PFC) converter is one of the most potential candidates in data center power supplies. However, the high-speed cycle-by-cycle zero current detection (ZCD) brings challenges to zero-voltage-switching (ZVS) control. Current sensing delay (CSD) exists, and the ZCD circuit is sensitive to high dv/dt switching noise. In this paper, mechanisms of the ZCD time error are elaborated, and impacts of the current sensing delay on converter switching frequency, inductor current, input current third harmonic distortion (THD), and power loss are analyzed. Qualification time is added within the controller for immunity to the swiching noise, and a CSD embedded converter model is proposed to compensate the ZCD time delay. Also, loss modeling of the CRM totem-pole PFC is conducted to aid in analysis of the proposed theory. A 1.5 kW single-phase CRM totem-pole PFC prototype is tested. Experimental results validiate the analysis, modeling, and the proposed compensation method for current sensing delay.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据