In this article, a bridgeless switched inductor Cuk (BSIC) converter based charger is presented to provide the low-cost and reduced-size charging solution for the light electric vehicles, i.e., LEVs, with enhanced performances at the supply side. Generally, the chargers of LEVs such as E-Rickshaws, E-Bike, and E-Cycle, are equipped with an additional converter to charge the batteries at low voltages (24–72 V). The switched inductor configuration improves the step-down dc voltage gain of the charger with only one stage and also improves the reliability at such low voltages. It is noteworthy that the cost associated with the sensors along with the size of the magnetic components is considerably reduced by operating the charger in discontinuous current mode condition. Moreover, the high-gain transformerless configuration further improves the cost, size, and efficiency of the charger. The effectiveness of the charger is tested on a laboratory prototype, for an 850 W rating with 220 V, 50 Hz nominal supply voltage conditions. The steady state and dynamic behaviors of the charger are analyzed under different operating conditions. Moreover, the behaviors of the charger during the initialization of charging process are analyzed for ensuring the soft starting of the charger. A basic comparison of the presented charger configuration with existing LEVs chargers is presented to highlight its advantages over the existing one.

中文翻译：

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改进电能质量的轻型电动汽车无变压器单级无桥变换器充电器

在本文中，提出了一种基于无桥开关电感器Cuk（BSIC）转换器的充电器，旨在为轻型电动汽车（即LEV）提供低成本和小尺寸的充电解决方案，并在供电侧增强其性能。通常，诸如电动人力车，电动自行车和电动自行车之类的LEV充电器都配有一个附加转换器，可在低电压（24-72 V）下对电池充电。开关电感器配置仅一步改善了充电器的降压直流电压增益，并且还改善了在这种低电压下的可靠性。值得注意的是，通过在不连续电流模式条件下操作充电器，可大大降低与传感器相关的成本以及磁性元件的尺寸。此外，高增益无变压器配置进一步提高了成本，充电器的尺寸和效率。充电器的有效性在实验室原型上进行了测试，额定功率为850 W，额定电源电压为220 V，50 Hz。分析了不同工作条件下充电器的稳态和动态行为。此外，分析了在充电过程的初始化期间充电器的行为，以确保充电器的软启动。提出的充电器配置与现有LEV充电器的基本比较旨在突出其相对于现有充电器的优势。分析了不同工作条件下充电器的稳态和动态行为。此外，分析了在充电过程的初始化期间充电器的行为，以确保充电器的软启动。提出的充电器配置与现有LEV充电器的基本比较旨在突出其相对于现有充电器的优势。分析了不同工作条件下充电器的稳态和动态行为。此外，分析了在充电过程的初始化期间充电器的行为，以确保充电器的软启动。提出的充电器配置与现有LEV充电器的基本比较旨在突出其相对于现有充电器的优势。