Power Factor Correction in BOOST converter for Wireless Power Transfer Applications

In the wireless charging system, the transfer efficiency of the open-loop system is very dependent on the coupling coefficient of the coupling coil and the load conditions. There will be inductance when load is a motor. It will reduce the Power Factor (PF) value of the secondary side. In this paper, PSIM is used to establish topology simulation of SS-type wireless charging system, and a BOOST circuit controlled by Power Factor Correction (PFC) is added to the secondary side circuit, which can adjust the duty cycle of MOS in the BOOST circuit according to the change of load impedance, so that the PF value of the secondary circuit is increased to 0.98.