Solar power battery charger with a parallel-load resonant converter

Y. Ke, Y. Chuang, Mei-Sung Kang, Yuan-Kang Wu, Ching-Ming Lai, Chien-Chih Yu
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引用次数: 12

Abstract

Although fossil fuels have led us to economic prosperity, the extensive use has caused a substantial reduction of fossil fuels. Therefore, the solar energy, as one of the green energy resources, has become an important alternative for the future. In this paper, the parallel loaded resonant converter with the feature of the soft switching technique was used in the circuits of the solar storage battery charger. To avoid the damage of the battery charger due to the variation of the output current of the solar PV panels, a closed-loop boost converter between the solar PV panel and the battery charger was designed to stabilize the output current of the solar PV panel. By designing the characteristic impedance of the resonant tank, the charging current of the storage battery can be calculated and then the charging time for the storage battery can further be estimated. By properly designing the circuit parameters, the parallel loaded resonant converter can be operated in the continuous current conduction mode and the switch can be switched for conduction at zero voltage. The experimental results verified the correctness of the theoretic estimation for the proposed battery charger circuit. The average charging efficiency of the battery charger can be up to 88.7%.
带并联负载谐振变换器的太阳能电池充电器
尽管化石燃料为我们带来了经济繁荣,但化石燃料的广泛使用也导致了化石燃料的大量减少。因此,太阳能作为绿色能源之一,已成为未来的重要替代能源。本文将具有软开关技术特点的并联负载谐振变换器应用于太阳能蓄电池充电器电路中。为了避免太阳能光伏板输出电流的变化对电池充电器造成损坏,在太阳能光伏板和电池充电器之间设计了一个闭环升压变换器,以稳定太阳能光伏板的输出电流。通过设计谐振槽的特性阻抗,可以计算出蓄电池的充电电流,进而估算出蓄电池的充电时间。通过合理设计电路参数,使并联负载谐振变换器工作在连续电流导通模式下,并在零电压下将开关切换为导通。实验结果验证了所提出的电池充电电路理论估计的正确性。电池充电器的平均充电效率可达88.7%。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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