| 摘要 |
A power supply device of a wireless power transmission device for wirelessly transmitting power to a wireless power reception device according to an embodiment of the present invention comprises a power supply unit supplying DC power; an oscillator generating an AC signal having a predetermined frequency; a conversion unit converting the DC power into AC power by using the AC signal; and a detection unit detecting a resonant frequency of the wireless power transmission device by using changes in the size of a current flowing through the power supply device according to the frequencies of the AC signal. [Reference numerals] (AA) Start;(BB,EE,GG,HH) No;(CC,DD,FF,II) Yes;(S101) Generate AC signaling having first frequency;(S103) Convert DC power into AC power;(S105) Measure a first current value applied to a conversion unit;(S107) Is the measured first current value above a threshold?;(S109) Store the first current value;(S111) Generate AC signaling having second frequency;(S113) Convert DC power into AC power;(S115) Measure the second current value converted into AC power;(S117) Is the measured second current value above a threshold?;(S119) Store the second current value;(S121) First current value > Second current value ?;(S123) Set the second frequency into resonant frequency;(S125) Does resonant frequency exist?;(S127) Transmit power to a wireless power receiving device;(S129) Display a removal message to the wireless power receiving device;(S131) Set the first frequency into resonant frequency |
