Development of charging infrastructure is one of the key factors for the successful operation of electric vehicles. This study proposes a power converter for on-board electric vehicle battery charger suitable with universal input voltage (85–265 V). The proposed converter is able to make better power quality by the reduction in total harmonic distortion (THD) of supply current, power factor correction and accurate output voltage regulation. System configuration includes diode bridge rectifier followed by three-level DC–DC SEPIC converter which emphasises on the reduction of voltage stress and switching loss across switches, thereby reduces the switch rating and improves the overall efficiency of the converter. The converter employs a duty cycle feed-forward controller scheme for charging the battery at constant voltage (CV) and constant current (CC) mode. Incorporating the above-said controller scheme has benefits of low THD in supply current, make power factor unity and nearly no zero-crossing detection. The proposed power factor correction converter system analysis is executed in continuous conduction mode. The system performance is evaluated with 400 V, 48 AH battery charging under CV and CC mode through MATLAB/Simulink and experimentation. To estimate the features of power quality indices like power factor and THD is recorded under the wide range of supply variations.

中文翻译：

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具有改善的电能质量和减小的开关应力的车载电动汽车电池充电器

充电基础设施的发展是电动汽车成功运行的关键因素之一。这项研究提出了一种适用于通用输入电压（85–265 V）的车载电动汽车电池充电器电源转换器。所提出的转换器能够通过降低电源电流的总谐波失真（THD），功率因数校正和精确的输出电压调节来提高电源质量。系统配置包括二极管桥式整流器，其后是三级DC-DC SEPIC转换器，该转换器着重于降低电压应力和开关之间的开关损耗，从而降低了开关额定值并提高了转换器的整体效率。该转换器采用占空比前馈控制器方案，以恒定电压（CV）和恒定电流（CC）模式为电池充电。结合上述控制器方案具有以下优点：电源电流中的THD低，使功率因数统一且几乎没有过零检测。提出的功率因数校正转换器系统分析在连续导通模式下执行。通过MATLAB / Simulink和实验，在CV和CC模式下，以400 V，48 AH电池充电来评估系统性能。为了估计电能质量指标的特征，例如功率因数和THD，记录在很大的电源变化范围内。提出的功率因数校正转换器系统分析在连续导通模式下执行。通过MATLAB / Simulink和实验，在CV和CC模式下，以400 V，48 AH电池充电来评估系统性能。为了估计电能质量指标的特征，例如功率因数和THD，记录在很大的电源变化范围内。提出的功率因数校正转换器系统分析在连续导通模式下执行。通过MATLAB / Simulink和实验，在CV和CC模式下，以400 V，48 AH电池充电来评估系统性能。为了估计电能质量指标的特征，例如功率因数和THD，记录在很大的电源变化范围内。