US 12,021,407 B2
Wireless charging receiving apparatus, method, terminal, and system
Yunhe Mao, Shenzhen (CN); Zhixian Wu, Dongguan (CN); Xiaosheng Zeng, Shenzhen (CN); and Yanding Liu, Dongguan (CN)
Assigned to HUAWEI TECHNOLOGIES CO., LTD., Shenzhen (CN)
Filed by Huawei Technologies Co., Ltd., Shenzhen (CN)
Filed on Apr. 29, 2021, as Appl. No. 17/244,017.
Application 17/244,017 is a continuation of application No. PCT/CN2018/113072, filed on Oct. 31, 2018.
Prior Publication US 2021/0249889 A1, Aug. 12, 2021
Int. Cl. H02J 7/02 (2016.01); B60L 53/12 (2019.01); H02J 50/12 (2016.01); H02J 50/80 (2016.01); H03L 7/085 (2006.01); H03L 7/099 (2006.01)
CPC H02J 7/02 (2013.01) [B60L 53/12 (2019.02); H02J 50/12 (2016.02); H02J 50/80 (2016.02); H03L 7/085 (2013.01); H03L 7/099 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A wireless charging receiving apparatus, comprising:
a receiver coil;
a rectifier; and
a controller;
wherein the receiver coil is configured to receive electromagnetic energy transmitted by a transmitter coil and to output an alternating current;
wherein the rectifier comprises at least two controllable switches, and is configured to rectify the alternating current from the receiver coil to a direct current by using the at least two controllable switches;
wherein the controller is configured to perform phase-locking on a phase of a current fundamental component of the alternating current received by the rectifier according to a phase difference between the current fundamental component and an initial preset periodic signal that are of a first round of phase-locking, and wherein the controller is configured to obtain a periodic signal having a same frequency as the current fundamental component as a result of the phase locking; and
wherein the controller is further configured to:
generate a synchronization reference signal having the same frequency as the periodic signal;
generate drive signals of the at least two controllable switches of the rectifier based on the synchronization reference signal; and
control, based on the drive signals, the at least two controllable switches of the rectifier to cause the rectifier to convert the alternating current into the direct current, wherein the drive signals and the current fundamental component have the same frequency.