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    POWER CONVERSION DEVICE
    1.
    发明公开
    POWER CONVERSION DEVICE 审中-公开

    公开(公告)号：EP3713063A1

    公开(公告)日：2020-09-23

    申请号：EP20152405.5

    申请日：2020-01-17

    申请人： Toshiba Tec Kabushiki Kaisha

    发明人： Usami, Yutaka

    IPC分类号： H02M1/12 ,  H02M1/04 ,  H02M1/42

    摘要： A power conversion device includes first and second current detectors. A coil is connected a first power terminal through the first and second current detectors. A first switch has a source terminal connected to the coil and a second semiconductor switch has a drain terminal connected to the coil. A first diode is connected between a drain terminal of the first semiconductor switch and a second power supply terminal. A second diode is connected between a source terminal of the second semiconductor switch and the second power terminal. A capacitor is connected in parallel with the first and second diodes. A control circuit is configured to turn the first and second semiconductor switches on or off based on current detections of the first and second current detectors.

    CONVERTER SYSTEM
    3.
    发明公开
    CONVERTER SYSTEM 审中-公开

    公开(公告)号：EP4106174A1

    公开(公告)日：2022-12-21

    申请号：EP21180063.6

    申请日：2021-06-17

    申请人： ABB Schweiz AG

    发明人： SCHWEIZER, Mario ,  FURLAN, Ivan ,  NOTARI, Nicola

    IPC分类号： H02M5/458 ,  H02M1/00 ,  H02M1/08 ,  H02M7/539 ,  H02M7/217 ,  H02M1/04 ,  H02M1/10 ,  H02M1/12

    摘要： The invention relates to a converter system (100) comprising a rectifier (106) that is configured to receive a grid voltage, a DC link stage (108) that is configured to receive an output voltage of the rectifier (106) and to provide a DC link voltage for an inverter (110), and the inverter (110) that is configured to receive the DC link voltage from the DC link stage (108) and to generate an output voltage. The rectifier (106), the DC link stage (108) and the inverter (110) are connected in series. The converter system (100) comprises further a control unit (200) with a slow reference frame angle determination unit (202) that is configured to generate a slow reference frame angle θ r,slow representing an angle that is slowly following a grid phase deviation, and with a fast Phase Locked Loop (PLL 208) that is configured to generate a fast reference frame angle θ r,fast representing an angle that is fast following a grid phase deviation. The control unit (200) is further configured to use the slow reference frame angle θ r,slow and the fast reference frame angle θ r,fast to control the rectifier output current, and to use the fast reference frame angle θ r,fast to control the inverter output voltage and to synchronize the inverter output voltage with the grid voltage.