公开(公告)号：US20210135498A1

公开(公告)日：2021-05-06

申请号：US17144764

申请日：2021-01-08

Applicant: Huawei Technologies Co., Ltd.

Inventor： Zhixian Wu ,  Yunhe Mao ,  Xiaosheng Zeng ,  Shuangquan Chen

IPC: H02J50/12 ,  H02J7/02 ,  H02J50/80 ,  B60L53/122

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.

公开(公告)号：US10439501B2

公开(公告)日：2019-10-08

申请号：US16172082

申请日：2018-10-26

Applicant: Huawei Technologies Co., Ltd.

Inventor： Ce Liu ,  Zhixian Wu

IPC: H02M3/335 ,  H02M1/08 ,  H02M1/00

Abstract: A resonant power converter and a frequency tracking method for a resonant power converter are disclosed to determine a resonant status of the resonant power converter by sampling a secondary current, thereby controlling frequency of a drive signal. Therefore, the frequency of the drive signal tracks resonant frequency of the resonant power converter. The resonant power converter includes an inverter branch, which connected to the inverter branch, a transformer connected to the resonant branch, and a rectification and filtering branch connected to the transformer. A primary side of the transformer is connected to the resonant branch, and a secondary side of the transformer is connected to the rectification and filtering branch. A detection branch is connected to both the secondary side of the transformer and the rectification and filtering branch.

公开(公告)号：US11312251B2

公开(公告)日：2022-04-26

申请号：US16455183

申请日：2019-06-27

Applicant: Huawei Technologies Co., Ltd.

Inventor： Yingtao Li ,  Pinghua Wang ,  Zhixian Wu

IPC: B60L53/124 ,  H02J50/80 ,  H02J50/90 ,  H02J50/12 ,  H02J50/20 ,  B60L53/66 ,  B60L53/65 ,  H02J7/02 ,  B60L53/68 ,  B60L53/126 ,  B60L53/62 ,  H02J7/00 ,  B60L53/122

Abstract: The present application relates to the field of automotive technologies, and provides an electric vehicle wireless charging method, an apparatus, and a system. A wireless charging station can charge an electric vehicle according to a charging request of the electric vehicle and charging permission of the electric vehicle prestored on the wireless charging station, so that resources of the wireless charging station are maximally used, and resource waste of the wireless charging station is avoided.

公开(公告)号：US11038433B2

公开(公告)日：2021-06-15

申请号：US17137786

申请日：2020-12-30

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Yunhe Mao ,  Zhixian Wu ,  Xiaosheng Zeng

IPC: H02M3/335 ,  H02M1/08 ,  B60L53/122 ,  H02J50/12

Abstract: This application discloses a phase alignment circuit and a method of a receive end, and a receive end. The receive end is located on an electric vehicle. The phase alignment 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 a phase difference from a preset phase shift angle, and control a phase of a bridge arm voltage of a 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.

公开(公告)号：US20210126491A1

公开(公告)日：2021-04-29

申请号：US17136894

申请日：2020-12-29

Applicant: Huawei Technologies Co., Ltd.

Inventor： Yunhe Mao ,  Zhixian Wu ,  Xiaosheng Zeng

IPC: H02J50/12 ,  H02J50/80

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.