Single-transmission and multiple-receiving type wireless energy transmission device
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The invention discloses a single-transmission and multiple-receiving type wireless energy transmission device. The single-transmission and multiple-receiving type wireless energy transmission device comprises a transmitter and at least two receivers, wherein each receiver comprises a receiving coil, a load and a receiving impedance matching network. A receiving high-frequency parasitic resistor exists in the receiving coil, one side of the receiving impedance matching network is connected with two ends of the receiving coil, and the other side of the receiving impedance matching network is connected with two ends of the load. Compared with a single-transmission and single-receiving type wireless energy transmission mode, in the same distance, the single-transmission and multiple-receiving type wireless energy transmission device can remarkably improve wireless energy transmission efficiency, and the more is the number of the receivers, the higher the total transmission efficiency is. In order to achieve single-transmission and multiple-receiving type wireless energy transmission efficiency, the change which needed to be carried out on a circuit structure is that the receiving impedance matching network is adjusted according to the value of an inter-coupling coefficient, and impedance from a high-frequency power source of the transmitter is enabled to be still matched with internal resistance of the high-frequency power source.