Metal Foreign Object Detection for the Mobile Phone Wireless Charging System in Vehicles
In response to the increasingly prominent safety issue of mobile phone wireless charging system in vehicles,the impact of metal foreign objects on electromagnetic induction of wireless charging system is analyzed in this paper.This article constructs a quality factor Q algorithm model based on the principle of electromagnetic induction,and proposes a foreign object detection algorithm model based on the value of quality factor Q.The wireless charging circuits in vehicles are designed based on circuit principles and customer requirements,and the effectiveness of the foreign object detection algorithm model is verified through simulation calculation.By comparing the simulation results,it can be seen that the quality factor Q value will decrease in the presence of metal foreign objects.This study provides a computational model for the development of wireless charging systems in vehicles,and provides a theoretical basis for the parameter design of the wireless sensing coil of the wireless charging system in vehicles.