公开(公告)号：US20240333026A1

公开(公告)日：2024-10-03

申请号：US18621415

申请日：2024-03-29

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Jun ZHAO ,  Chengliang ZHANG ,  Zhu MAO ,  Yaowei HU ,  Zhixiang HU

IPC: H02J9/06 ,  H02J3/32 ,  H02J3/38 ,  H02M1/00

CPC classification number: H02J9/062 ,  H02J3/32 ,  H02J3/38 ,  H02M1/0067 ,  H02J2300/26

Abstract: A micro inverter and a control method therefor, an uninterruptible power supply, and a power supply system. The micro inverter includes a primary-side winding, a first secondary-side winding, a second secondary-side winding, a first power conversion, a second power conversion circuit and an energy storage buffer circuit. When the micro inverter generates double frequency ripple power, a controller controls the energy storage buffer circuit to perform charging in a first time period, so that energy from the first power conversion circuit is absorbed by using the transformer to perform energy buffering, and controls the energy storage buffer circuit to perform discharging in a second time period, so that energy is transferred to the second power conversion circuit by using the transformer. According to the embodiments, a volume of the micro inverter can be reduced, costs are reduced, and reliability of a power converter is improved.

公开(公告)号：US20220337095A1

公开(公告)日：2022-10-20

申请号：US17853286

申请日：2022-06-29

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Donghao WU ,  Baoshan WU ,  Chengliang ZHANG

IPC: H02J50/12

Abstract: This application provides a wireless power transmission system. The system includes a transmitter and a receiver, where the transmitter includes a DC/AC inverter circuit, a first resonant inductor, a first capacitor, and a first compensation inductor that are connected in series; and the receiver includes an AC/DC rectifier circuit, a second resonant inductor, a second capacitor, and a second compensation inductor that are connected in series; and power at the transmitter is transmitted to the receiver through electromagnetic induction between the first resonant inductor and the second resonant inductor, and the AC/DC rectifier circuit is configured to provide the rectified power to a load of the receiver. This solution is applicable to a wireless power supply scenario or a wireless charging scenario.

公开(公告)号：US20220337094A1

公开(公告)日：2022-10-20

申请号：US17852686

申请日：2022-06-29

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Baoshan WU ,  Chengliang ZHANG ,  Donghao WU ,  Wei LU

IPC: H02J50/12 ,  H02J50/80 ,  H02J50/90

Abstract: A wireless electric energy transmission system is provided, including a transmitter and a receiver. The transmitter includes a DC/AC inverter circuit, a first inductor, and a first capacitor that are connected in series. The transmitter is configured to: detect a value of a resonant frequency of the transmitter; detect a value of a coupling coefficient between the transmitter and the receiver; obtain a value of a constant-voltage operating frequency of the transmitter through calculation based on the resonant frequency and the coupling coefficient; and control an operating frequency of the DC/AC inverter circuit based on the constant-voltage operating frequency obtained through calculation.

公开(公告)号：US20220085642A1

公开(公告)日：2022-03-17

申请号：US17535356

申请日：2021-11-24

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Baoshan WU ,  Yunpeng YANG ,  Chengliang ZHANG ,  Bing CAI ,  Donghao WU

IPC: H02J7/04 ,  H02J50/12 ,  H02J7/00

Abstract: A wirelessly charged electronic device, a wireless charging method, and a wireless charging system are disclosed. A charger of a receive end of the system includes an open-loop DC-DC (direct current-to-direct current) converter. When power of a transmit end is greater than a first preset threshold of the transmit end and required charging power is greater than a first preset threshold of a receive end, the open-loop DC-DC converter is controlled to work in a fast charging phase, specifically including: controlling the open-loop DC-DC converter to work in a constant current step-down phase to charge a battery at a constant current, or controlling the open-loop DC-DC converter to work in a constant voltage step-down phase to charge the battery at a constant voltage.