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：US20230231506A1

公开(公告)日：2023-07-20

申请号：US18189305

申请日：2023-03-24

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Wingto FAN ,  Weiliang SHU ,  Yanding LIU ,  Qitang LIU ,  Hongcheng YOU

IPC: H02P29/028 ,  H02P29/032 ,  H01F13/00

CPC classification number: H02P29/028 ,  H01F13/006 ,  H02P29/032 ,  H02P2207/05

Abstract: A protection apparatus and a brushless motor system reduce costs of the brushless motor system and ensure normal operation of a brushless motor. The protection apparatus includes a demagnetization apparatus and a control apparatus. The demagnetization apparatus is configured to be bridged between a rectifier circuit and an excitation winding, and is configured to consume, when the brushless motor system is faulty, excess electric energy generated on the excitation winding. The control apparatus is configured to separately connect to an excitation power supply circuit and a controller; and is configured to detect electrical parameters of an input terminal and an output terminal of the excitation power supply circuit, and when determining that the electrical parameters exceed a preset threshold, generate an alarm to the controller and adjust the output electrical parameter of the excitation power supply circuit.

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：US20230155419A1

公开(公告)日：2023-05-18

申请号：US18157703

申请日：2023-01-20

Applicant: Huawei Technologies Co., Ltd.

Inventor： Weiliang SHU ,  Hongcheng YOU ,  Qitang LIU ,  Wingto FAN ,  Yanding LIU

IPC: H02J50/12 ,  H04B5/00

CPC classification number: H02J50/12 ,  H04B5/0037

Abstract: A power regulation method, apparatus, and device for NFC communication and NFC charging are disclosed. The apparatus includes: an NFC power converter, an NFC coil, an NFC circuit, a controller, and a power regulator. The NFC power converter is configured to connect to a direct-current power supply and generate a high-frequency alternating-current output. The NFC coil is configured to generate/receive an NFC high-frequency magnetic field and transmit/receive NFC power or an NFC signal. The NFC circuit is connected to the NFC power converter and is configured to transmit/receive the high-frequency alternating-current output. The controller is configured to generate different power control signals based on different operating modes of an NFC apparatus.