With the widespread use of electric vehicles (EVs), the design of a highly quality and efficient battery charger has become an important research topic. In this study, an efficient AC-DC power factor corrected (PFC) boost converter with active snubber cell (ASC) is proposed for the battery charger. ASC integrated into the AC-DC PFC boost converter turns on the main switch with zero voltage transition (ZVT) and turns off with zero current transition (ZCT), which among soft switching techniques for eliminating the switching losses. In addition, it has been provided that other switching elements are operated with soft switching. Soft switching conditions and unity power factor (PF) are achieved from light load to full load conditions. Unlike the soft-switched PFC converter circuits in the current literature, no current and voltage stresses have been observed on any component in the main converter and ASC circuits. The paper also presents the steady-state operating principles and design guidelines of the proposed converter in detail. The efficiency improvement between the hard switched counterpart has been verified by making detailed loss analysis. The proposed converter has been constructed as 3.3 kW and tested according to European efficiency standards with various case studies. The total harmonic distortion (THD) of input current has been measured as less than 5% in compliance with EN 6100-3-2 Class D Limits (A) standards.

随着电动汽车（EV）的广泛使用，高质量和高效率的电池充电器的设计已成为重要的研究课题。在这项研究中，针对电池充电器，提出了一种具有有源缓冲电池（ASC）的高效AC-DC功率因数校正（PFC）升压转换器。集成在AC-DC PFC升压转换器中的ASC在零电压转换（ZVT）时打开主开关，在零电流转换（ZCT）时关闭，这是软开关技术中的一种，可消除开关损耗。此外规定，其他开关元件通过软开关来运行。从轻载到满载条件都可以实现软开关条件和单位功率因数（PF）。与当前文献中的软开关PFC转换器电路不同，在主转换器和ASC电路的任何组件上均未观察到电流和电压应力。本文还详细介绍了拟议转换器的稳态工作原理和设计指南。硬交换对方之间的效率提高已通过进行详细的损耗分析得到了验证。拟议的转换器已构建为3.3 kW，并根据欧洲效率标准和各种案例研究进行了测试。根据EN 6100-3-2 D类限制（A）标准，已测量输入电流的总谐波失真（THD）小于5％。硬交换对方之间的效率提高已通过进行详细的损耗分析得到了验证。拟议的转换器已构建为3.3 kW，并根据欧洲效率标准和各种案例研究进行了测试。根据EN 6100-3-2 D类限制（A）标准，已测量输入电流的总谐波失真（THD）小于5％。硬交换对方之间的效率提高已通过进行详细的损耗分析得到了验证。拟议的转换器已构建为3.3 kW，并根据欧洲效率标准和各种案例研究进行了测试。根据EN 6100-3-2 D类限制（A）标准，已测量输入电流的总谐波失真（THD）小于5％。