公开(公告)号：US11527960B2

公开(公告)日：2022-12-13

申请号：US16865762

申请日：2020-05-04

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Yushan Li ,  Liming Ye ,  Heping Dai

IPC: H02M3/335 ,  H02M1/40 ,  H02M1/08

Abstract: An apparatus includes a pulse-width modulation (PWM) generator configured to generate a PWM signal for controlling a power switch of a power converter, a bias switch and a bias capacitor connected in series and coupled to a magnetic winding of the power converter and a comparator having a first input connected to the bias capacitor, a second input connected to a predetermined reference and an output configured to generate a signal for controlling the bias switch to allow a magnetizing current from the magnetic winding to charge the bias capacitor when a voltage across the bias capacitor is less than the predetermined reference.

公开(公告)号：US20220393578A1

公开(公告)日：2022-12-08

申请号：US17685702

申请日：2022-03-03

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Liming Ye ,  Heping Dai ,  Ning Wang ,  Gang Ye

IPC: H02M3/07 ,  H02M1/088 ,  H02M1/00

Abstract: A method includes detecting a voltage signal of a three-level power converter, the voltage signal indicative of a capacitor voltage balancing in the three-level power converter, and dynamically adjusting an operating variable to adjust the voltage signal until the capacitor voltage balancing in the three-level power converter satisfies a criteria.

公开(公告)号：US11848603B2

公开(公告)日：2023-12-19

申请号：US18064816

申请日：2022-12-12

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Yushan Li ,  Liming Ye ,  Heping Dai

IPC: H02M3/335 ,  H02M1/40 ,  H02M1/08 ,  H02M3/00

CPC classification number: H02M1/40 ,  H02M1/08 ,  H02M3/33569 ,  H02M3/33592 ,  H02M3/00 ,  H02M3/33573

Abstract: An apparatus includes a controller configured to generate a PWM signal for controlling a power switch of a forward converter, a bias switch and a bias capacitor connected in series and coupled to a bias winding of the forward converter, and a comparator having a first input connected to the bias capacitor, a second input connected to a predetermined reference and an output configured to generate a signal for controlling the bias switch to allow a magnetizing current from the bias winding to charge the bias capacitor when a voltage across the bias capacitor is less than the predetermined reference.

公开(公告)号：US11588397B2

公开(公告)日：2023-02-21

申请号：US16899361

申请日：2020-06-11

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Huibin Zhu ,  Heping Dai ,  Liming Ye ,  Yongtao Liang ,  Weiping Liu

IPC: H02M1/42 ,  H02M7/217 ,  H02M3/00 ,  H02M3/335 ,  H02M1/08 ,  H02M1/00

Abstract: A power conversion system includes a first power conversion port including a three-level power factor correction device and a primary power conversion circuit, a second power conversion port including a three-level rectifier and a third power conversion port including a rectifier, the first power conversion port, the second power conversion port and the third power conversion port magnetically coupled to each other through a transformer.

公开(公告)号：US12119767B2

公开(公告)日：2024-10-15

申请号：US17660456

申请日：2022-04-25

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Huibin Zhu ,  Dianbo Fu ,  Heping Dai ,  Liming Ye

IPC: H02P27/06 ,  B60L50/60 ,  H02M1/00 ,  H02M3/335 ,  H02M7/483

CPC classification number: H02P27/06 ,  B60L50/60 ,  H02M3/33584 ,  H02M7/483 ,  B60L2210/10 ,  B60L2210/30 ,  B60L2210/40 ,  B60L2220/00 ,  H02M1/007 ,  H02M1/0074

Abstract: A system includes a first power conversion device connected to a first power source, a first isolated power conversion device connected to the first power source, and a second power conversion device connected to the first isolated power conversion device, wherein outputs of the first power conversion device and outputs of the second power conversion device are connected in series, and series-connected outputs of the first power conversion device and the second power conversion device are configured to drive a motor.

公开(公告)号：US11909326B2

公开(公告)日：2024-02-20

申请号：US16726678

申请日：2019-12-24

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Heping Dai ,  Liming Ye ,  Dianbo Fu ,  Daoshen Chen

IPC: H02M3/337 ,  H02M3/00 ,  H02M3/335 ,  H02M3/07 ,  H02M3/158 ,  H02M3/18 ,  H02M1/00

CPC classification number: H02M3/3372 ,  H02M3/01 ,  H02M3/07 ,  H02M3/1582 ,  H02M3/18 ,  H02M3/33573 ,  H02M3/33576 ,  H02M1/007 ,  H02M1/0058 ,  H02M3/33571 ,  Y02B70/10

Abstract: An apparatus includes an isolated power converter having an input connected to an input dc power source, a first output and a second output, and a non-isolated power converter having an input connected to the second output of the isolated power converter, wherein the first output of the isolated power converter and an output of the non-isolated power converter are connected in series.

公开(公告)号：US11843316B2

公开(公告)日：2023-12-12

申请号：US16932574

申请日：2020-07-17

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Liming Ye ,  Heping Dai

IPC: H02M3/335 ,  H02M3/158 ,  H02M7/483 ,  H02M3/00 ,  H02M1/00

CPC classification number: H02M3/158 ,  H02M3/01 ,  H02M3/33573 ,  H02M3/33592 ,  H02M7/4837 ,  H02M1/0003

Abstract: According to one aspect, an apparatus comprising a two stage DC-DC converter is provided. The converter consists of a multilevel DC-DC converter stage cascaded with a fixed voltage ratio DC-DC converter stage. The converter is controlled so that a first stage of the converter provides an optimized output (a regulated bus voltage) which serves as the input to the second stage. The multilevel DC-DC converter may be the first stage and the fixed voltage ratio, unregulated DC-DC converter may be the second stage converter. Alternatively, the fixed voltage ratio, unregulated DC-DC converter may be the first stage and the multilevel DC-DC converter may be the second stage.

公开(公告)号：US20220190714A1

公开(公告)日：2022-06-16

申请号：US17685680

申请日：2022-03-03

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Liming Ye ,  Heping Dai ,  Dianbo Fu

IPC: H02M3/07 ,  H02M3/158 ,  H02M1/00

Abstract: A system includes a first switched-capacitor converter including a plurality of switches connected in series, a second switched-capacitor converter, and a third switched-capacitor converter connected in parallel with the second switched-capacitor converter between a common node of two switches of the plurality of switches and a load, the second switched-capacitor converter and the third switched-capacitor converter both including inductors.

公开(公告)号：US12218608B2

公开(公告)日：2025-02-04

申请号：US17685702

申请日：2022-03-03

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Liming Ye ,  Heping Dai ,  Ning Wang ,  Gang Ye

IPC: H02M7/483 ,  H02M1/00 ,  H02M3/07

Abstract: A method includes detecting a voltage signal of a three-level power converter, the voltage signal indicative of a capacitor voltage balancing in the three-level power converter, and dynamically adjusting an operating variable to adjust the voltage signal until the capacitor voltage balancing in the three-level power converter satisfies a criteria.

公开(公告)号：US20230133307A1

公开(公告)日：2023-05-04

申请号：US18064816

申请日：2022-12-12

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Yushan Li ,  Liming Ye ,  Heping Dai

IPC: H02M1/40 ,  H02M3/335 ,  H02M1/08

Abstract: An apparatus includes a controller configured to generate a PWM signal for controlling a power switch of a forward converter, a bias switch and a bias capacitor connected in series and coupled to a bias winding of the forward converter, and a comparator having a first input connected to the bias capacitor, a second input connected to a predetermined reference and an output configured to generate a signal for controlling the bias switch to allow a magnetizing current from the bias winding to charge the bias capacitor when a voltage across the bias capacitor is less than the predetermined reference.