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1.发明公开公开(公告)号：US20230216399A1
公开(公告)日：2023-07-06
申请号：US18182859
申请日：2023-03-13
Applicant: Huawei Technologies Co., Ltd.
Inventor： Piniwan Thiwanka Bandara Wijekoon , Zhaohui Wang , Jun Wang
CPC classification number: H02M3/07 , H02M3/01 , H02M1/0058
Abstract: A DC/DC power converter converts voltage at an input of the DC/DC power converter to a voltage at an output of the DC/DC power converter, where the output voltage is a multiple of the input voltage. The DC/DC power converter comprises two switching circuits electrically connected in series, two capacitors electrically connected in series, and a resonant circuit comprising a resonant capacitor and a resonant inductor. The series connection of the two capacitors is electrically connected in parallel to the series connection of the two switching circuits. The resonant circuit is electrically connected to the two switching circuits. A first capacitor of the two capacitors is electrically connected in parallel to the input. Each switching circuit comprises two switching units electrically connected in series, wherein each switching unit comprises two or more switches electrically connected in series.
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公开(公告)号：US10903758B2
公开(公告)日：2021-01-26
申请号：US16566242
申请日：2019-09-10
Applicant: Huawei Technologies Co., Ltd.
Inventor： Dianbo Fu , Zhaohui Wang , Lei Shi
Abstract: A method comprises during a first half cycle, configuring a first switch to operate as an always-on switch, turning on a second switch prior to turning on a third switch and turning off the third switch prior to turning off the second switch, wherein the first switch and the second switch are connected in series and further in parallel with the third switch between a first terminal of a power source and a filter and during a second half cycle, configuring a fourth switch to operate as an always-on switch, turning on a fifth switch prior to turning on a sixth switch and turning off the sixth switch prior to turning off the fifth switch, wherein the fourth switch and the fifth switch are connected in series and further in parallel with the sixth switch between a second terminal of the power source and the filter.
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公开(公告)号：US20240097550A1
公开(公告)日：2024-03-21
申请号：US18523588
申请日：2023-11-29
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
IPC: H02M1/00
CPC classification number: H02M1/0003
Abstract: A controller controls a balancer circuit, and is configured to: determine a difference value between a first DC link voltage value across a first DC link of a power converter and a second DC link voltage value across a second DC link of the power converter; determine a phase-angle and a magnitude of the difference value for an integer harmonic of a predetermined grid frequency; and provide a switching signal for switching between the first DC link and the second DC link based on the phase-angle and the magnitude. The controller is also configured to control a mid-point current at a mid-point terminal of the power converter in terms of magnitude and direction based on the switching signal.
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4.发明公开公开(公告)号：US20240055993A1
公开(公告)日：2024-02-15
申请号：US18496212
申请日：2023-10-27
Applicant: Huawei Technologies Co., Ltd.
Inventor： Piniwan Thiwanka Bandara Wijekoon , Sebastian Rosado , Zhaohui Wang
CPC classification number: H02M3/1584 , H02M1/088 , H02M1/0048
Abstract: A converter comprises a first circuit part and a second circuit part configured to be electrically connected with each other. Each circuit part comprises two or more switches configured to be switched for the power conversion, the switches being semiconductor switches. The two or more switches of the first circuit part are configured for a first switching operation of the first circuit part. The two or more switches of the second circuit part are configured for a second switching operation of the second circuit part. The first switching operation causes a greater electrical power loss compared to the second switching operation. The two circuit parts are configured such that the first circuit part is configured to operate at a higher operating temperature compared to the second circuit part.
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公开(公告)号：US20210143751A1
公开(公告)日：2021-05-13
申请号：US17157155
申请日：2021-01-25
Applicant: Huawei Technologies Co., Ltd.
Inventor： Dianbo Fu , Zhaohui Wang , Lei Shi
IPC: H02M7/487
Abstract: An inverter includes an upper unit comprises a first switch, a second switch and a third switch, wherein during a first half of a cycle of the inverter, the second switch is turned on before and turned off after the third switch, a lower unit comprising a fourth switch, a fifth switch and a sixth switch, wherein during a second half of the cycle of the inverter, the fifth switch is turned on before and turned off after the sixth switch, a flying capacitor connected between the upper unit and the lower unit, and a filter connected to a common node of the upper unit and the lower unit.
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Patent Agency Ranking
公开(公告)号：US20240333124A1
公开(公告)日：2024-10-03
申请号：US18741105
申请日：2024-06-12
Applicant: Huawei Technologies Co., Ltd.
Inventor： Sebastian Rosado , Piniwan Thiwanka Bandara Wijekoon , Zhaohui Wang
CPC classification number: H02M1/0003 , H02M3/07 , H02M7/483
Abstract: A balancer circuit for a series connection of two direct current (DC)-link capacitors comprises a first and second terminal for being connected to a first and second terminal of the series connection of the capacitors, respectively; and a third terminal for being connected to a node between the capacitors. The balancer circuit comprises a first and second inductor and a capacitor arrangement connected in series between the first and second terminal of the balancer circuit. The capacitor arrangement is connected between the first and second inductor. The balancer circuit comprises a first switch arrangement connected between the third terminal and a node between the first inductor and the capacitor arrangement; and a second switch arrangement connected between the third terminal and a node between the second inductor and the capacitor arrangement. The first and second switch arrangement each comprises a semiconductor switch or two semiconductor switches connected in series.
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公开(公告)号：US20240266972A1
公开(公告)日：2024-08-08
申请号：US18640731
申请日：2024-04-19
Applicant: Huawei Technologies Co., Ltd.
Inventor： Sebastian Rosado , Zhaohui Wang , Miroljub Bakic , Piniwan Thiwanka Bandara Wijekoon
CPC classification number: H02M7/4833 , H02M1/0043 , H02M7/493 , H02M3/33584
Abstract: A power conversion system includes a first direct current to alternating current (DC-AC) inverter, a second DC-AC inverter, an inverter controller, a direct current (DC)-link circuit connecting the first DC-AC inverter and the second DC-AC inverter, a neutral-point balancer (NPB), an NPB circuit, and an NPB controller. The inverter controller is configured to provide a pulse-width modulation (PWM), signal to the first DC-AC inverter and the second DC-AC inverter. The NPB circuit is configured to reduce low frequency current oscillations in the DC-link circuit by switching between a first state for transferring charge from a positive voltage line to a neutral voltage line, and a second state for transferring charge from the neutral voltage line to a negative voltage line. The NPB controller is configured to control the switching of the NPB circuit and is synchronized with the PWM signal from the inverter controller.
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公开(公告)号：US20230089387A1
公开(公告)日：2023-03-23
申请号：US17991645
申请日：2022-11-21
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Piniwan Thiwanka Bandara Wijekoon , Zhaohui Wang , Jun Wang
Abstract: A DC/DC power converter for converting voltage at an input to a voltage at an output of the DC/DC power converter is provided, wherein the output voltage is a multiple of the input voltage. The DC/DC power converter comprises two switching circuits electrically connected in series, two capacitor units electrically connected in series, and a resonant circuit comprising a resonant capacitor and a resonant inductor. A first switching circuit of the two switching circuits is electrically connected to one side of the first capacitor unit opposite to the other side of the first capacitor unit connected to the second capacitor unit of the two capacitor units. The switches of the first switching circuit are controllable semiconductor switches. The first switching circuit comprises one or more diode units electrically connecting the first capacitor unit to the two switching units of the first switching circuit.
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公开(公告)号：US20200007050A1
公开(公告)日：2020-01-02
申请号：US16566242
申请日：2019-09-10
Applicant: Huawei Technologies Co., Ltd.
Inventor： Dianbo Fu , Zhaohui Wang , Lei Shi
IPC: H02M7/487 , H02M7/5387 , H02M1/088 , H02J3/38
Abstract: A method comprises during a first half cycle, configuring a first switch to operate as an always-on switch, turning on a second switch prior to turning on a third switch and turning off the third switch prior to turning off the second switch, wherein the first switch and the second switch are connected in series and further in parallel with the third switch between a first terminal of a power source and a filter and during a second half cycle, configuring a fourth switch to operate as an always-on switch, turning on a fifth switch prior to turning on a sixth switch and turning off the sixth switch prior to turning off the fifth switch, wherein the fourth switch and the fifth switch are connected in series and further in parallel with the sixth switch between a second terminal of the power source and the filter.
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公开(公告)号：US12206324B2
公开(公告)日：2025-01-21
申请号：US17991645
申请日：2022-11-21
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Piniwan Thiwanka Bandara Wijekoon , Zhaohui Wang , Jun Wang
Abstract: A DC/DC power converter for converting voltage at an input to a voltage at an output of the DC/DC power converter is provided, wherein the output voltage is a multiple of the input voltage. The DC/DC power converter comprises two switching circuits electrically connected in series, two capacitor units electrically connected in series, and a resonant circuit comprising a resonant capacitor and a resonant inductor. A first switching circuit of the two switching circuits is electrically connected to one side of the first capacitor unit opposite to the other side of the first capacitor unit connected to the second capacitor unit of the two capacitor units. The switches of the first switching circuit are controllable semiconductor switches. The first switching circuit comprises one or more diode units electrically connecting the first capacitor unit to the two switching units of the first switching circuit.
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