Design of a contactless charging platform

The circuit of the designed CCP is shown in Fig. 10. The power transmission efficiency of the CCP shown in Fig. 11 demonstrates it's a function of coil gap and displacement. The experimental results show that the output voltage of the CCP is 5V at the induction coil gap of 2mm without any displacement. The maximum transmission efficiency is about 41%, and transmission efficiency maintained is above 40% while the secondary coil displacement less than 6mm.