用于电动汽车电池充电的非接触式动力转换系统

摘要

Contactless power transfer systems are desirable having more compact and lightweight for electric vehicles （EVs） recharging. A transformer of the system was developed according to the criteria of having high efficiency, a large air gap, and good tolerance to misalignment. The transformer uses series and parallel capacitors with rectangular cores and double-sided windings, with the size of 240 mm×300 mm×40 mm, the gap length of （70 ± 20） mm, the misalignment tolerance in the lateral direction of ± 125 mm, and the secondary mass of 4.6 kg. The characteristics of the system were studied with a charge control circuit and lead acid batteries being connected to the secondary winding. The results show that an output power of 1.5 kW and efficiency of 95% was achieved in the normal position and that the system has acompact-structure, light-weight, and satisfies the above criteria.%为了给电动汽车再次充电,需要结构紧凑、轻量化的非接触式动力转换系统。根据高效率、大气隙、有一定的误接宽容度的准则,开发了一种采用串并联电容器、具有矩形铁芯和双边缠绕的新型变换器,其尺寸为240mm×300mm×40mm,气隙为（70±20）mm,横向误接宽容度为±125mm,次级绕组质量为4.6kg。在次级绕组连接了充电控制电路和铅酸电池的情况下,测量了该系统的性能,在正常位置上获得了1.5kW的输出功率和95%的效率。结果表明：该系统结构紧凑、轻量化,满足了上述判据。