The Performance Analysis of an Air Gapped Transformer Used in Wireless Charging System for Shuttle Robot

This study included performance analysis studies of an EE core structured and air gapped transformer which is operated under the network frequency for wireless charging battery of shuttle robots during duty. Proposed design is modeled analytically and design is verified by 2 dimensional finite element analysis (FEA) and experiments. In this stage no loaded, full loaded, and short circuit analysis of model are simulated and performance is determined according to air gap distance. Primary and secondary currents, voltages, power factor, efficiency, active power, regulation and short-circuit ratios are examined by analysis and experiments. In FEA solutions, input power is 588,28 W, output power is 387,89 W, power factor is 0.31, regulation is 30,88 %, short-circuit ratio is 70,78 % for 3 mm air gap distance. The air-gapped transformer was used in wireless charge station (WCS) and tested. About 63 V voltage and 4.24 A current are applied to Pb-Ac battery group by WCS. 200Wh energy is transferred wirelessly along 45 minutes.