公开(公告)号：US20220340024A1

公开(公告)日：2022-10-27

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 ,  H02J50/12 ,  B60L53/62

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.

公开(公告)号：US20230163705A1

公开(公告)日：2023-05-25

申请号：US18158038

申请日：2023-01-23

Applicant: Huawei Technologies Co., LTD.

Inventor： Weiliang SHU ,  Wingto FAN ,  Shuangquan CHEN

IPC: H02P21/14 ,  H02P29/024 ,  H02P9/14 ,  H02P25/03

CPC classification number: H02P21/14 ,  H02P29/024 ,  H02P9/14 ,  H02P25/03

Abstract: An input end of a first power conversion circuit of the system is connected to a power supply, and an output end of the first power conversion circuit is connected to a stator winding of an electrical excitation motor. An input end of a second power conversion circuit is connected to the power supply, and an output end of the second power conversion circuit is connected to a primary side of an excitation transformer. The excitation transformer transmits energy required by an excitation winding of the electrical excitation motor from a stator to a rotor. A first controller controls the first power conversion circuit to inject a current excitation into the stator winding, so that a current is generated on the excitation winding. A detection circuit obtains a response signal of the primary side of the excitation transformer and sends the response signal to a second controller.

公开(公告)号：US20230417945A1

公开(公告)日：2023-12-28

申请号：US18464335

申请日：2023-09-11

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Shuyang WANG ,  Shuangquan CHEN ,  Yunhe MAO ,  Yanding LIU

IPC: G01V3/10 ,  H02J50/12 ,  H02J50/60 ,  B60L53/124

CPC classification number: G01V3/102 ,  H02J50/12 ,  H02J50/60 ,  B60L53/124

Abstract: The technology of this application relates to a foreign object detection apparatus that includes a controller, a first resonant network, a signal coupler, and a phase difference detector. The signal coupler may obtain a resonance current signal corresponding to the first resonant network, and couple the resonance current signal to a preset carrier signal to obtain a coupled current signal. A frequency of the preset carrier signal can be the same as a frequency of an excitation signal. The phase difference detector may extract a low-frequency signal component from the coupled current signal, and determine a phase difference signal based on the low-frequency signal component. An amplitude of the phase difference signal correspondingly indicates a phase difference between the excitation signal and the resonance current signal. The controller may determine, based on the amplitude of the phase difference signal, whether a foreign object exists in a detection area corresponding to the first resonant network.

公开(公告)号：US20220069638A1

公开(公告)日：2022-03-03

申请号：US17502243

申请日：2021-10-15

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Xiaosheng ZENG ,  Yunhe MAO ,  Shuangquan CHEN ,  Qitang LIU

IPC: H02J50/90 ,  H02J50/12 ,  B60L53/12 ,  B60L53/38

Abstract: The technology of this disclosure relates to a wireless charging alignment method and apparatus, a wireless charging system, and an electric vehicle, and belongs to the field of wireless charging. In the wireless charging alignment apparatus, a first detection circuit may detect a first induction signal of a power receive coil in a positioning magnetic field generated by a power transmit coil; a second detection circuit may detect a second induction signal of a location detection coil in the positioning magnetic field; and a location determining circuit may determine a location of the power receive coil relative to the power transmit coil based on the first induction signal and the second induction signal.

公开(公告)号：US20230179030A1

公开(公告)日：2023-06-08

申请号：US18154217

申请日：2023-01-13

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Hongcheng YOU ,  Xiaosheng ZENG ,  Yunhe MAO ,  Zhixian WU ,  Shuangquan CHEN ,  Yanding LIU

IPC: H02J50/90 ,  B60L53/122 ,  H02J50/12

CPC classification number: H02J50/90 ,  B60L53/122 ,  H02J50/12

Abstract: Example positioning system based on a low frequency magnetic field and apparatus are described. One example positioning system includes a low frequency magnetic field transmit apparatus and a low frequency magnetic field receive apparatus. The transmit apparatus includes a transmit coil, a conflict detect coil, and a magnetic field generation detection control module. The receive apparatus includes a receive coil and a magnetic field detection control module. When the conflict detect coil does not sense a low frequency magnetic field signal, the magnetic field generation detection control module controls the transmit coil to transmit a first low frequency magnetic field signal. When the received low frequency magnetic field signal is the first low frequency magnetic field signal, the magnetic field detection control module determines relative positions of the transmit coil and the receive coil based on signal strength of the first low frequency magnetic field signal.

公开(公告)号：US20220337100A1

公开(公告)日：2022-10-20

申请号：US17853424

申请日：2022-06-29

Applicant: Huawei Technologies Co., Ltd.

Inventor： Xiaosheng ZENG ,  Zhixian WU ,  Yunhe MAO ,  Shuangquan CHEN

IPC: H02J50/80 ,  H02J50/10 ,  H02J7/00 ,  B60L55/00 ,  B60L53/126

Abstract: This application provides a frequency locking method, a wireless charging system, a receiving device, and a transmitting device for determining, through interaction between the receiving device and the transmitting device in a wireless charging scenario, whether a frequency locking procedure can be performed between the transmitting device and the receiving device. The receiving device includes: a controller, configured to control short-circuiting of an input terminal of a rectifier; a transceiver, configured to transmit a frequency locking request to the transmitting device, where the frequency locking request carries information about a first preset range, and the frequency locking request requests the transmitting device to generate an emission current whose frequency is within the first preset range; a receiving module, configured to obtain an input current of the rectifier based on the emission current; and a detector, configured to detect a frequency of the input current.

公开(公告)号：US20230361685A1

公开(公告)日：2023-11-09

申请号：US18343899

申请日：2023-06-29

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Wingto FAN ,  Shuangquan CHEN ,  Weiliang SHU ,  Yunhe MAO

IPC: H02M3/00 ,  H02M3/335 ,  H02P6/32

CPC classification number: H02M3/33569 ,  H02M3/01 ,  H02P6/32

Abstract: A resonant power supply, a primary-side feedback excitation power supply controller, a method, and a control apparatus are disclosed. In the resonant power supply, a bridge circuit is electrically connected to a power supply. The bridge circuit is configured to convert, based on a drive signal, a direct current provided by the power supply into a square wave signal. An LC series resonant network is electrically connected to the bridge circuit and a primary-side winding. The LC series resonant network is configured to convert the square wave signal into an alternating current, and output the alternating current to the primary-side winding. The alternating current includes an input voltage Vt and an input current Ir.