HIGH EFFICIENCY WIRELESS CHARGING SYSTEM AND ITS CONTROL METHOD

摘要

A control method for a wireless charging system has steps of performing impedance matching on an antenna of the wireless charging system; tracing an optimal frequency point by sending a sensing signal with a default transmission frequency, and calculating a transmission efficiency of the sensing signal; determining whether the transmission efficiency meets a transmission requirement. When the transmission efficiency does not meet the transmission requirement, repeats the previous steps with another default transmission frequency until the transmission efficiency meeting the transmission requirement. When the transmission efficiency meeting the transmission requirement, the default transmission frequency is defined as the optimal frequency point for charging. Setting the optimal frequency point as an operating frequency of the wireless charging system for charging The optimal frequency point defined by the above steps can maintain high efficiency of the wireless charging system against the variable transmitting distances.

主权项

1. A control method for a high efficiency wireless charging system, comprising the steps of:
keeping a resonant frequency point of a wireless charging system in an operating frequency range of the wireless charging system by performing impedance matching on an antenna of the wireless charging system; tracing an optimal frequency point by sending a sensing signal with a default transmission frequency, and calculating a transmission efficiency of the sensing signal; determining whether the transmission efficiency meets a transmission requirement; when the transmission efficiency does not meet the transmission requirement, repeats the previous steps with another default transmission frequency until the transmission efficiency meeting the transmission requirement; when the transmission efficiency meeting the transmission requirement, the default transmission frequency is defined as the optimal frequency point; setting the optimal frequency point as an operating frequency of the wireless charging system for charging.