Abstract—A equalization charger using parallel-or series-parallel-resonant inverter for series-connected supercapacitors is proposed in this paper, according to low voltage characteristic of supercapacitor. This topology reduces a large number switches and only has resonant structure including some diodes and a single transformer. In addition, because of the characteristic of parallel resonant inverter, the equalization charging current can be limited in the numerical value. So the topology can work steadily without feedback control. The control circuit is greatly simplified. The simulation results from a 200W universal input prototype are given to verify the effectiveness of the analysis and the merits and demerits of this topology also are introduced.
 

Index Terms—supercapacitor (SCs), resonant inverter, equalization charger

Cite: Yifan Zhou and Lei Li, "Equalization Chargers Using Parallel- or Series-Parallel-Resonant Inverter for Series-Connected Supercapacitors," International Journal of Electronics and Electrical Engineering, Vol. 4, No. 2, pp. 106-110, April 2016. doi: 10.18178/ijeee.4.2.106-110