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    COMMON-MODE VOLTAGE SUPPRESSION METHOD AND SYSTEM FOR QUASI-Z-SOURCE SIMPLIFIED THREE-LEVEL INVERTER
    2.
    发明公开
    COMMON-MODE VOLTAGE SUPPRESSION METHOD AND SYSTEM FOR QUASI-Z-SOURCE SIMPLIFIED THREE-LEVEL INVERTER 审中-公开

    公开(公告)号：US20240348152A1

    公开(公告)日：2024-10-17

    申请号：US18280336

    申请日：2022-12-28

    Applicant: SHANDONG JIANZHU UNIVERSITY

    Inventor： Changwei QIN ,  Xiaoyan LI ,  Zhiyuan CHU ,  Hongliang ZHANG ,  Yanfeng LI

    IPC: H02M1/12 ,  H02M1/088 ,  H02M7/487 ,  H02M7/5395

    CPC classification number: H02M1/123 ,  H02M1/088 ,  H02M7/487 ,  H02M7/5395

    Abstract: A common-mode voltage suppression method includes: selecting two large and two small vectors with low common-mode voltage magnitudes as basic voltage vectors; writing a volt-second balance equation according to a selected basic voltage vectors, and calculating, an introduced distribution factor of duty cycles of small vectors, initial values of distribution factors of a duty cycle of each basic voltage vector and of small vectors; designing a neutral-point voltage balance controller to obtain and utilize a corrected value of the distribution factor of the duty cycles of the small vectors and the initial values and combine with a set neutral-point voltage balance control threshold to update the duty cycle of each basic voltage vector; and inserting shoot-through states into the small vectors, designing a switching sequence, converting the sequence into a driving signal of a power switch, and controlling an operation of the quasi-Z-source simplified three-level inverter.

    Circuits and methods for generating a continuous current sense signal
    6.
    发明授权
    Circuits and methods for generating a continuous current sense signal 有权

    公开(公告)号：US12040692B2

    公开(公告)日：2024-07-16

    申请号：US17830639

    申请日：2022-06-02

    Applicant: Murata Manufacturing Co., Ltd.

    Inventor： Buddhika Abesingha ,  Tim Wen Hui Yu

    IPC: H02M1/00 ,  H02M1/12

    CPC classification number: H02M1/0009 ,  H02M1/0087 ,  H02M1/123

    Abstract: Methods and devices for sensing current through a power converter circuit are presented. According to one aspect, currents through high-/low-side transistors are sensed via respective reduced size replica transistors. According to another aspect, the sensed currents are used to generate bridging currents that are combined with the sensed currents to generate a continuous current sense signal. According to another aspect, the bridging currents include slopes that are generated from slopes of the sensed currents. According to another aspect, the sensed currents are combined and filtered to generate a continuous sense signal. According to another aspect, the continuous current sense signal is a voltage that is compared to a reference voltage to generate a current limit status flag used to control operation of the power converter circuit. According to other aspects, the current sense voltage is used to control ON/OFF duty cycle of the power converter circuit.

    Harmonic Suppression Apparatus, Method, Control Unit, Electrical Appliance, and Storage Medium
    7.
    发明公开
    Harmonic Suppression Apparatus, Method, Control Unit, Electrical Appliance, and Storage Medium 审中-公开

    公开(公告)号：US20240235372A9

    公开(公告)日：2024-07-11

    申请号：US18269378

    申请日：2021-10-22

    Applicant: Gree Electric Appliances, Inc. of Zhuhai

    Inventor： Xiaobin Fang ,  Jialiang Zheng ,  Hongtao Yu ,  Xianyi Song

    IPC: H02M1/12 ,  H02M1/00 ,  H02M1/42 ,  H02M7/5387

    CPC classification number: H02M1/123 ,  H02M1/0009 ,  H02M1/4216 ,  H02M7/53871

    Abstract: The present disclosure provides a harmonic suppression apparatus, method, control unit, power supply apparatus, electric appliance equipment, and storage medium, wherein the harmonic suppression apparatus includes a tuning circuit module, which is connected with a first live wire and a second live wire of a three-phase power supply and is configured to perform resonance regulation processing; a PI-type resonant filtering circuit module, which is respectively connected with the tuning circuit module and a third live wire of the three-phase power supply and is configured to perform harmonic filtering processing on the first-phase current and the second-phase current processed by the tuning circuit module and a third-phase current; and a rectification circuit module, which is connected with the PI-type resonant filtering circuit module and is configured to perform rectification progressing and a power a load.

    Noise filter and power supply device
    9.
    发明授权
    Noise filter and power supply device 有权

    公开(公告)号：US11811383B2

    公开(公告)日：2023-11-07

    申请号：US17518639

    申请日：2021-11-04

    Applicant: MITSUBISHI ELECTRIC CORPORATION

    Inventor： Kenji Hirose ,  Kyota Otsuka

    IPC: H03H7/01 ,  H03H1/00 ,  H02M1/12 ,  H01F17/06 ,  H03H7/42 ,  H05K1/16

    CPC classification number: H03H7/0153 ,  H01F17/06 ,  H02M1/123 ,  H03H7/427 ,  H05K1/16 ,  H03H1/0007

    Abstract: A noise filter includes: a first bus bar that is electrical wiring of a flat plate, the first bus bar including a first extending wiring portion extending in a first direction, a second extending wiring portion extending in a second direction that is a direction opposite to the first direction, and a first coupling wiring portion connecting the first extending wiring portion and the second extending wiring portion; a first lead conductor having a first end connected with the first coupling wiring portion; a first capacitor having a first end connected with a second end of the first lead conductor and a second end connected with a ground; and a magnetic core having an opening in a central portion, the magnetic core disposed in such a manner that the first coupling wiring portion passes through the opening.

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