US 12,413,100 B2
Wireless electric energy transmission system
Baoshan Wu, Dongguan (CN); Chengliang Zhang, Dongguan (CN); Donghao Wu, Shenzhen (CN); and Wei Lu, Shenzhen (CN)
Assigned to Huawei Digital Power Technologies Co., Ltd., Shenzhen (CN)
Filed by Huawei Digital Power Technologies Co., Ltd., Shenzhen (CN)
Filed on Jun. 29, 2022, as Appl. No. 17/852,686.
Application 17/852,686 is a continuation of application No. PCT/CN2020/138965, filed on Dec. 24, 2020.
Claims priority of application No. 201911424812.8 (CN), filed on Dec. 31, 2019.
Prior Publication US 2022/0337094 A1, Oct. 20, 2022
Int. Cl. H02J 50/12 (2016.01); H02J 50/60 (2016.01); H02J 50/80 (2016.01); H02J 50/90 (2016.01)
CPC H02J 50/12 (2016.02) [H02J 50/60 (2016.02); H02J 50/80 (2016.02); H02J 50/90 (2016.02)] 19 Claims
OG exemplary drawing
 
1. A wireless electric energy transmission system comprising:
a transmitter comprising:
a DC/AC inverter circuit,
a first inductor, and
a first capacitor that are connected in series; and
a receiver, comprising:
an AC/DC rectifier circuit,
a second inductor, and
a second capacitor that are connected in series, wherein electric energy of the transmitter is transmitted to the receiver through electromagnetic induction between the first inductor and the second inductor, and the AC/DC rectifier circuit is configured to rectify the electric energy transmitted by the transmitter to the receiver; and the transmitter is configured to:
detect a value of a resonant frequency of the transmitter;
detect a value of a coupling coefficient between the transmitter and the receiver;
obtain a value of a constant-voltage operating frequency of the transmitter through calculation based on the resonant frequency and the coupling coefficient; and
control an operating frequency of the DC/AC inverter circuit based on the constant-voltage operating frequency obtained through calculation;
wherein the transmitter is configured to control the operating frequency of the DC/AC inverter circuit by supplying an input voltage at a first value of the operating frequency that is configured to be rectified to a constant voltage, subsequently adjusting the first value of the operating frequency to a second value of the operating frequency that is configured to be rectified to the constant voltage, and subsequently supplying the input voltage at the second value of the operating frequency.