基于SiC的图腾柱无桥PFC电路过零点电流尖峰研究  

Research on Zero Crossing Current Spike of Totem-Pole Bridgeless PFC Circuit Based on SiC

作　　者：林智伟 毛行奎[1] 陈奇 郑润明 朱俊高 LIN Zhiwei;MAO Xingkui;CHEN Qi;ZHENG Runmin;ZHU Jungao(College of Electrical Engineering and Automation,Fuzhou University,Fuzhou 350108,China;Shenzhen Lifud Technology Co.,Ltd.,Shenzhen 518125,China)

机构地区：[1]福州大学电气工程与自动化学院,福建福州350108 [2]深圳莱福德科技股份有限公司,广东深圳518125

出　　处：《电器与能效管理技术》2023年第2期16-21,共6页Electrical & Energy Management Technology

基　　金：国家自然科学基金项目(51207025,52107183)。

摘　　要：虽然基于SiC的图腾柱无桥功率因素校正(PFC)电路性能优,但仍存在固有的过零点电流尖峰的问题。为抑制过零点电流尖峰,在深入分析图腾柱无桥PFC电路过零点电流尖峰基础上,提出在过零点附近过渡区间插入基于数字控制的新电流尖峰抑制电路。新控制策略包含在过零点前插入实现快切换桥臂开关管软启动的控制,和过零点后采用增强PI控制器的控制。为实现平滑软启动,进一步提出基于实时电流闭环PI反馈的软启动策略。新控制策略电路模态少,控制简单有效,实现容易。The totem-pole bridgeless PFC circuit based on SiC has excellent performance,but there is still an inherent problem of zero crossing current spike.In order to suppress the zero crossing current spike,based on the depth analysis of the zero crossing current spike of totem-pole bridgeless PFC circuit,a new current spike suppression strategy based on digital control is proposed,which inserts a transition interval near the zero crossing.The new strategy includes the control of fast switching bridge arm switch soft start before the zero crossing,and the control of enhanced PI controller after the zero crossing.In order to achieve the smooth soft start,a soft start strategy based on the real-time current closed-loop PI feedback is further proposed.The new control strategy has fewer circuit modes,simple and effective control and easy implementation.

关 键 词：SIC 图腾柱无桥PFC 电流尖峰 电流畸变率 

分 类 号：TM714.1[电气工程—电力系统及自动化]