| 摘要 |
PURPOSE: A power transmitter and a method for detecting a non-power receiving target are provided to precisely determine foreign materials by comparing a measurement value with a received value. CONSTITUTION: If the change of a load is sensed above a critical value, power for communication is transmitted(205). It is determined whether a subscription request about a multiple wireless power transmission network is received in preset time by corresponding to power transmission(210). It is determined whether the change of the load is within a preset range based on the initial information of a power receiver(225). If the change of the load exceeds the preset range, the power receiver to send the subscription request is determined as the non-power receiving target(215). The power transmission for the determined non-power receiving target is stopped(245). [Reference numerals] (200) Sensing a load change?; (205) Transmitting power for communication; (210) Receiving a network subscription request message?; (215) Determining a non-power receiving object; (220) Comparing a reference load value with a load change value; (225) Is it within an allowable range?; (230) Is a network subscription possible?; (235) Transmitting a network subscription approval message; (240) Transmitting a network subscription refusal message; (245) Stopping power transmission to a corresponding charging object; (AA) Start; (BB,DD,FF,II) No; (CC,EE,GG,HH) Yes; (JJ) Finish |
