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1.发明授权公开(公告)号：US11870275B2
公开(公告)日：2024-01-09
申请号：US17134084
申请日：2020-12-24
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Yunhe Mao , Zhixian Wu , Yanding Liu , Furong Xiao
IPC: H02J50/60 , H02J50/12 , B60L53/124
CPC classification number: H02J50/60 , H02J50/12 , B60L53/124 , H02J2310/48
Abstract: An apparatus and a method for detecting a metal foreign matter in a wireless charging system, and a device are provided. The apparatus includes a phase-lock control module, an excitation module, a resonance module, a signal collection module, and a determining module. The phase-lock control module is configured to: adjust a frequency of a first signal and output the first signal to the excitation module and the determining module. The excitation module is configured to: generate a second signal based on the first signal, and output the second signal to the resonance module. The resonance module is configured to output the third signal to the signal collection module under excitation of the second signal. The determining module is configured to determine whether there is a metal foreign matter in an area of the target coil.
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公开(公告)号：US12021407B2
公开(公告)日：2024-06-25
申请号：US17244017
申请日：2021-04-29
Applicant: Huawei Technologies Co., Ltd.
Inventor： Yunhe Mao , Zhixian Wu , Xiaosheng Zeng , Yanding Liu
Abstract: A wireless charging receiving apparatus is provided, which includes a receiver coil, a rectifier, and a controller. The receiver coil is configured to receive electromagnetic energy and output an alternating current. The rectifier includes at least two controllable switches, and is configured to rectify the alternating current from the receiver coil to a direct current s. The controller is configured to perform phase-locking on a phase of a current fundamental component of the alternating current received by the rectifier, to obtain a periodic signal having a same frequency as the current fundamental component; and the controller is further configured to: generate a synchronization reference signal having the same frequency as the periodic signal, generate drive signals of the controllable switches in the rectifier based on the synchronization reference signal, and control, based on the drive signals, controllable switches in the rectifier to convert the alternating current into the direct current.
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3.发明申请公开(公告)号：US20230081974A1
公开(公告)日：2023-03-16
申请号：US17990649
申请日：2022-11-18
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Xiaosheng Zeng , Hongcheng You , Yunhe Mao , Zhixian Wu , Shuangquan Chen
Abstract: This application discloses a wireless charging receiver, transmitter, system, and control method, and an electric vehicle, and relates to the field of wireless charging technologies. A low-frequency magnetic field receive coil of the receiver converts a low-frequency magnetic field into an induced signal. A receiver controller is configured to: when all low-frequency magnetic field transmit coils stop working, allocate a signal feature different from that of a current induced signal to each low-frequency magnetic field transmit coil, and send a correspondence between each low-frequency magnetic field transmit coil and the allocated signal feature to the wireless charging transmitter; and is further configured to determine, when the low-frequency magnetic field transmit coil works, relative positions of the power transmit coil and the power receive coil by using an induced signal having the allocated signal feature.
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公开(公告)号：US20210249889A1
公开(公告)日：2021-08-12
申请号：US17244017
申请日：2021-04-29
Applicant: Huawei Technologies Co., Ltd.
Inventor： Yunhe Mao , Zhixian Wu , Xiaosheng Zeng , Yanding Liu
Abstract: A wireless charging receiving apparatus is provided, which includes a receiver coil, a rectifier, and a controller. The receiver coil is configured to receive electromagnetic energy and output an alternating current. The rectifier includes at least two controllable switches, and is configured to rectify the alternating current from the receiver coil to a direct current s. The controller is configured to perform phase-locking on a phase of a current fundamental component of the alternating current received by the rectifier, to obtain a periodic signal having a same frequency as the current fundamental component; and the controller is further configured to: generate a synchronization reference signal having the same frequency as the periodic signal, generate drive signals of the controllable switches in the rectifier based on the synchronization reference signal, and control, based on the drive signals, controllable switches in the rectifier to convert the alternating current into the direct current.
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5.发明申请公开(公告)号：US20210119494A1
公开(公告)日：2021-04-22
申请号：US17134084
申请日：2020-12-24
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Yunhe Mao , Zhixian Wu , Yanding Liu , Furong Xiao
Abstract: An apparatus and a method for detecting a metal foreign matter in a wireless charging system, and a device are provided. The apparatus includes a phase-lock control module, an excitation module, a resonance module, a signal collection module, and a determining module. The phase-lock control module is configured to: adjust a frequency of a first signal and output the first signal to the excitation module and the determining module. The excitation module is configured to: generate a second signal based on the first signal, and output the second signal to the resonance module. The resonance module is configured to output the third signal to the signal collection module under excitation of the second signal. The determining module is configured to determine whether there is a metal foreign matter in an area of the target coil.
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Patent Agency Ranking
公开(公告)号：US12088188B2
公开(公告)日：2024-09-10
申请号：US17144764
申请日：2021-01-08
Applicant: Huawei Technologies Co., Ltd.
Inventor： Zhixian Wu , Yunhe Mao , Xiaosheng Zeng , Shuangquan Chen
CPC classification number: H02M1/007 , B60L53/122 , H02J7/02 , H02J50/12 , H02J50/80 , H02M3/01 , H02M3/33573
Abstract: A wireless charging control method for an electric vehicle or a wireless charging transmitter includes an inner-loop control circuit, a boost circuit, an inverter circuit, and a transmitting coil, where the inner-loop control circuit is coupled to both the boost circuit and the inverter circuit, and an input end and an output end of the inverter circuit are respectively coupled to the boost circuit and the transmitting coil, and the inner-loop control circuit is configured to obtain a first current reference signal and a sampled current signal of the transmitting coil, compare the first current reference signal with the sampled current signal to obtain an absolute value of a difference between the first current reference signal and the sampled current signal, and adjust a phase shift angle of the inverter circuit or a duty cycle of the boost circuit when the absolute value is greater than a preset deviation.
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公开(公告)号：US12049144B2
公开(公告)日：2024-07-30
申请号：US17840963
申请日：2022-06-15
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Shuangquan Chen , Zhixian Wu , Yunhe Mao , Xiaosheng Zeng , Hongcheng You
IPC: B60L53/122 , B60L53/62 , H02J50/12
CPC classification number: B60L53/122 , B60L53/62 , H02J50/12
Abstract: A transmit end, a receive end, a method, and a system for wireless charging are provided, and are applied to the field of electric vehicles. A transmit-end controller compares an actual output current of an inverter with a preset upper limit value of an output current of the inverter and controls an output voltage of the inverter based on a comparison result to adjust a current of a transmit coil. A receive-end controller receives a sampled value of the current of the transmit coil that is sent by the transmit-end controller and updates a reference value of the current of the transmit coil when a difference between the sampled value of the current of the transmit coil and the reference value of the current of the transmit coil is greater than or equal to a preset value.
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公开(公告)号：US11909228B2
公开(公告)日：2024-02-20
申请号：US17850325
申请日：2022-06-27
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Chunsen Tang , Zhihui Wang , Yaoyi Wang , Pengfei Bai , Zhenzhen Wang , Jiakai Cao , Wei Kuang , Zhixian Wu
IPC: H02J50/60 , H02J50/10 , B60L53/124 , H02J50/00
CPC classification number: H02J50/60 , B60L53/124 , H02J50/005 , H02J50/10
Abstract: This application provides a foreign object detection method and apparatus, and a wireless charging system. The foreign object detection apparatus includes a coil array and a foreign object detection circuit. The coil array includes at least one coil group, and each coil group includes four detection coils whose locations are symmetrical to each other. The foreign object detection circuit determine an abnormal-value threshold of each coil group based on induction signals of each coil group and that are obtained in a first time period, and detect, based on the abnormal-value threshold and the induction signals of each coil group, whether there is a foreign object; when it is determined that there is no foreign object, detect, based on the signal threshold of each coil group and induction signals that are of each coil group and that are obtained in a second time period, whether there is a foreign object.
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公开(公告)号：US11482941B2
公开(公告)日：2022-10-25
申请号：US17345189
申请日：2021-06-11
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Yunhe Mao , Zhixian Wu , Xiaosheng Zeng
Abstract: This application discloses a phase alignment circuit and method of a receive end, and a receive end, where the phase alignment circuit and method of a receive end. The receive end is located on the electric vehicle. The circuit includes: a phase measurement circuit and a controller. The controller is configured to: use, as an actual phase shift angle, a result obtained by subtracting the phase difference from a preset phase shift angle, and control a phase of a bridge arm voltage of the rectifier to lag behind the phase of the input current fundamental component by the actual phase shift angle. The controller outputs a drive signal for a controllable switching transistor of the rectifier by using the actual phase shift angle. Because a lagging phase caused due to filtering is compensated for, precision of synchronization between the bridge arm voltage and the input current can be increased.
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公开(公告)号：US11177696B2
公开(公告)日：2021-11-16
申请号：US17136894
申请日：2020-12-29
Applicant: Huawei Technologies Co., Ltd.
Inventor： Yunhe Mao , Zhixian Wu , Xiaosheng Zeng
Abstract: A receive end and a transmit end of a wireless charging system, and the wireless charging system, where the receive end includes a receive coil, a rectifier, and a receive end controller, where the receive coil receives an alternating magnetic field and outputs an alternating current, the rectifier is configured to rectify the alternating current from the receive coil into a direct current, the receive end controller is configured to adjust, based on a target impedance sent by a transmit end controller, a reflection impedance reflected from the receive end to a transmit end such that an inverter of the transmit end implements a zero voltage switching (ZVS), and a bridge arm voltage is a voltage between two bridge arm midpoints of a full bridge rectifier or a voltage between a single bridge arm midpoint of a half bridge rectifier and ground.
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