Patent ID: 11870274
Assignee: HUAWEI TECHNOLOGIES CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 11:
12. The wireless charging device according to claim 9, wherein the second charging unit comprises a second transmitter coil group and a plurality of second inverter circuits, the second transmitter coil group comprises a plurality of second transmitter coils that are in a one-to-one correspondence with the plurality of second inverter circuits, one end of each of the second inverter circuits is connected to the first controller, and the other end of each of the second inverter circuits is connected to the corresponding second transmitter coil;
before obtaining the second electromagnetic coupling strength, the first controller is further to control each of the second inverter circuits to output a second excitation signal;
the second inverter circuit is to generate the second excitation signal, and output the second excitation signal to the corresponding second transmitter coil;
the second transmitter coil is to receive the second excitation signal output by the corresponding second inverter circuit and generate and transmit a second induction signal under excitation by the second excitation signal, wherein the second induction signal is used to induce a to-be-charged device located in an induction area of the second transmitter coil; and
when a to-be-charged device is detected through induction, the first controller is further to obtain an identifier of the to-be-charged device.