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    Bidirectional Power Conversion System and Control Method
    11.
    发明申请
    Bidirectional Power Conversion System and Control Method 有权

    公开(公告)号：US20220109373A1

    公开(公告)日：2022-04-07

    申请号：US17643471

    申请日：2021-12-09

    Applicant: Huawei Digital Power Technologies Co., Ltd.

    Inventor： Dianbo Fu ,  Heping Dai ,  Liming Ye

    IPC: H02M3/335 ,  H02M1/42

    Abstract: A bidirectional power conversion system includes an isolated power converter having a first input connected to an output of a diode rectifier and a second input connected to an output of a power factor correction device. The power conversion system further comprises a plurality of switches and a plurality of diodes configured such that the plurality of switches and the plurality of diodes form the diode rectifier and the power factor correction device when the system is configured to deliver power from an AC power source to a DC load and the plurality of switches forms an inverter when the system is configured to deliver power from a DC power source to an AC load.

    Bidirectional power conversion system and control method
    12.
    发明授权
    Bidirectional power conversion system and control method 有权

    公开(公告)号：US12191782B2

    公开(公告)日：2025-01-07

    申请号：US17643471

    申请日：2021-12-09

    Applicant: Huawei Digital Power Technologies Co., Ltd.

    Inventor： Dianbo Fu ,  Heping Dai ,  Liming Ye

    IPC: H02M3/335 ,  H02M1/00 ,  H02M1/42 ,  H02M7/797

    Abstract: A bidirectional power conversion system includes an isolated power converter having a first input connected to an output of a diode rectifier and a second input connected to an output of a power factor correction device. The power conversion system further comprises a plurality of switches and a plurality of diodes configured such that the plurality of switches and the plurality of diodes form the diode rectifier and the power factor correction device when the system is configured to deliver power from an AC power source to a DC load and the plurality of switches forms an inverter when the system is configured to deliver power from a DC power source to an AC load.

    Hybrid multilevel inverters with reduced voltage stress
    15.
    发明授权
    Hybrid multilevel inverters with reduced voltage stress 有权

    公开(公告)号：US11489456B2

    公开(公告)日：2022-11-01

    申请号：US17157155

    申请日：2021-01-25

    Applicant: Huawei Digital Power Technologies Co., Ltd.

    Inventor： Dianbo Fu ,  Zhaohui Wang ,  Lei Shi

    IPC: H02M7/487 ,  H02M7/49 ,  H02M7/483 ,  H02M3/07

    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.

    Power systems with inverter input voltage control
    16.
    发明授权
    Power systems with inverter input voltage control 有权

    公开(公告)号：US11437823B2

    公开(公告)日：2022-09-06

    申请号：US16741259

    申请日：2020-01-13

    Applicant: Huawei Digital Power Technologies Co., Ltd.

    Inventor： Xiaolin Mao ,  Heping Dai ,  Huibin Zhu ,  Dianbo Fu

    IPC: H02J3/38 ,  H02J7/02 ,  H02J1/10 ,  H02J13/00

    Abstract: A direct current (DC) bus voltage from a combined output of a plurality of DC power modules is controlled based on an alternating current (AC) voltage of a power grid. The DC bus voltage tracks the AC grid voltage to provide efficient conversion between the DC power sources and the AC grid, even when the amplitude of the AC grid voltage varies. In one example, a variable reference voltage is generated based on a detected AC grid voltage. The reference voltage increases and decreases in proportion to increases and decreases in the AC grid voltage. In this manner, large differences between the bus voltage and the grid voltage are avoided. By closely tracking the two voltages, efficiency in the modulation index for power conversion can be achieved.

    Method and Apparatus for Controlling Solar Power Systems
    18.
    发明申请
    Method and Apparatus for Controlling Solar Power Systems 有权

    公开(公告)号：US20220181886A1

    公开(公告)日：2022-06-09

    申请号：US17651812

    申请日：2022-02-21

    Applicant: Huawei Digital Power Technologies Co., Ltd.

    Inventor： Heping Dai ,  Xiaolin Mao ,  Dianbo Fu ,  Huibin Zhu

    IPC: H02J3/38 ,  H02S50/10 ,  H02S50/00

    Abstract: A system includes a plurality of power modules connected in series between two input terminals of an inverter, a plurality of local controllers coupled to their respective power modules, wherein a first local controller of the plurality of local controllers is coupled to a first power module comprising a first solar panel, a first capacitor and a first power optimizer, and wherein the first local controller is configured to enable the first power optimizer to switch among a buck mode, a boost mode and a pass-through mode based upon a maximum power point tracking (MPPT) current of the first solar panel, and a central controller coupled to the inverter, wherein the central controller is configured to regulate an input voltage of the inverter.

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