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    INVERTER APPARATUS AND CONTROL METHOD THEREOF
    1.
    发明公开
    INVERTER APPARATUS AND CONTROL METHOD THEREOF 审中-公开

    公开(公告)号：EP4439965A1

    公开(公告)日：2024-10-02

    申请号：EP24166380.6

    申请日：2024-03-26

    Applicant: Huawei Digital Power Technologies Co., Ltd.

    Inventor： LU, Fenglong ,  LIU, Shuai ,  CHEN, Dong ,  SHI, Lei

    IPC: H02M7/5387 ,  H02M7/483 ,  H02M1/12 ,  H02M1/44 ,  H02M1/34 ,  H02P27/08

    CPC classification number: H02M7/5387 ,  H02M1/12 ,  H02M1/123 ,  H02M1/126 ,  H02M1/44 ,  H02P2209/0120130101 ,  H02M7/487

    Abstract: This application provides an inverter apparatus and a control method thereof. The inverter apparatus includes a direct current bus, a bus capacitor, an inverter bridge arm, a filter circuit, a switch unit, and a controller. The inverter bridge arm is connected to a positive direct current bus and a negative direct current bus, and the filter circuit is connected between the inverter bridge arm and a user load. In a working scenario in which the inverter apparatus switches between on-grid operation and off-grid operation, when the working scenario is on-grid operation and off-grid operation with a balanced load, an inverter uses a common-mode injection modulation mode; and when the working scenario is off-grid operation with an unbalanced load, the inverter uses a common SPWM modulation mode. This application is implemented, to improve working efficiency of the inverter in more working scenarios, and the implementation is simple, stable, reliable, and load-friendly.

    CONVERTER CIRCUITS
    2.
    发明公开
    CONVERTER CIRCUITS 审中-公开

    公开(公告)号：EP4439949A1

    公开(公告)日：2024-10-02

    申请号：EP24167464.7

    申请日：2024-03-28

    Applicant: Hamilton Sundstrand Corporation

    Inventor： XING, Lei ,  DWARI, Suman ,  CHEN, W. Warren

    IPC: H02M1/00 ,  H02M7/483 ,  H02M7/487

    CPC classification number: H02M1/0095 ,  H02M7/487 ,  H02M7/4837 ,  H02M7/4833

    Abstract: A system can include a bi-directional converter circuit (101) comprising a plurality of switches (S1, S2, S3, S4, S5, S6, S9, S10) and a flying capacitor (Cf) configured to experience a low voltage or a high voltage, and a control module operatively connected to the plurality of switches to control a state of the plurality of switches. The control module can be configured to receive a sense signal indicative of a flying capacitor voltage and to control the one or more switches of the plurality of switches to charge or discharge the flying capacitor to maintain a target voltage or target voltage range.

    CONTROL APPARATUS FOR AN ARCP INVERTER
    10.
    发明公开
    CONTROL APPARATUS FOR AN ARCP INVERTER 审中-公开

    公开(公告)号：EP4380035A1

    公开(公告)日：2024-06-05

    申请号：EP22210534.8

    申请日：2022-11-30

    Applicant: ABB SCHWEIZ AG

    Inventor： Leppänen, Veli-Matti ,  Muszynski, Peter

    IPC: H02M7/5395 ,  H02M1/00 ,  H02M7/487

    CPC classification number: H02M7/487 ,  H02M7/5395 ,  H02M1/0012 ,  H02M1/0016 ,  H02M1/0054

    Abstract: A control apparatus for ARCP (Auxiliary Resonant Commuted Pole) power inverters comprises a modulator and a modulation control (70). The modulator is configured to carry out a commutation of an ARCP inverter by selectively using a Continuous PWM (CPWM) modulation and a Discontinuous PWM (DPWM) modulation. The modulation control (76) is configured to dynamically select (76) either the CPWM modulation or the DPWM modulation in a such a way that switching losses of the ARCP inverter are reduced while a failure of the commutation of the ARCP inverter due to a neutral point voltage unbalance of the ARCP inverter is avoided.

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