Wireless charging system with double detecting circuits

摘要

A wireless charging system with double detecting circuits comprises a detecting circuit connected to an inductive loop to detect the induced electric field of the inductive loop; an auxiliary detection circuit connected to a power loop to detect the induced electric field of the power loop, wherein when the waveform detected by the detecting circuit is not applicable, it is replaced by the waveform detected by the auxiliary detecting circuit in order to determine the condition of the electrical receiver device and thus adjust the output to the inductive loop from the power loop.

主权项

1. A wireless charging system with double detecting circuits, comprising:
an inductive loop including an induction coil and a capacitor, wherein said induction coil and said capacitor are connected in series; a power loop including a power source and a driving circuit, wherein said power source is connected to an input terminal of said driving circuit, two output terminals of said driving circuit are connected to said capacitor and said induction coil respectively; and a control loop including:
a processor;a detection circuit, coupled to said processor and a detection point of said inductive loop so that said processor can detect an induced electric field of said inductive loop, wherein a first current or a first voltage of said inductive loop is created by said induced electric field as an induced waveform over time;an auxiliary detection circuit, connected to an auxiliary detection point of said power loop to detect said induced electric field, wherein a current or a voltage of said power loop induced by said induced electric field represents an auxiliary induced waveform over time, as said induced waveform is not applicable determined by said processor based on a protocol, said induced waveform is replaced by said auxiliary induced waveform;a control line, coupled to said processor and said power source so that said processor can control a power supply of said power source outputted to said inductive loop; andan auxiliary control line, coupled to said processor and said power source so that said processor can control a phase or a frequency of said driving circuit to control said power supply for said inductive loop; wherein said processor determines a condition of said electrical receiver device based on said induced electric field, to adjust said power supply of said power loop outputted to said inductive loop.