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    CROSS CONDUCTION PREVENTION IN POWER CONVERTERS
    1.
    发明公开
    CROSS CONDUCTION PREVENTION IN POWER CONVERTERS 审中-实审

    公开(公告)号：EP4418519A1

    公开(公告)日：2024-08-21

    申请号：EP24157748.5

    申请日：2024-02-15

    申请人： Power Integrations, Inc.

    发明人： Nayaknur, Akshay

    IPC分类号： H02M3/335 ,  H02M1/32 ,  H02M1/38 ,  H02M1/00

    CPC分类号： H02M3/33507 ,  H02M3/33592 ,  H02M1/0003 ,  H02M1/0058 ,  H02M1/32 ,  H02M1/38 ,  H02M1/0038

    摘要： A controller for a power converter includes a primary controller and a secondary controller. The primary controller is coupled to a primary winding of the energy transfer element and a primary switch of the power converter. The secondary controller is coupled to a secondary winding of the energy transfer element and a secondary switch, e.g., a synchronous rectifier, of the power converter. The secondary controller has a synchronous rectifier control/drive circuit, a control logic circuit, and a cross conduction detector circuit. Cross conduction is when the primary switch turns on when the secondary switch is active. The cross-conduction detector circuit produces a Disable SR signal when cross conduction event detected. The cross-conduction detector circuit detects zero voltage switching cross conduction event and a minimum conduction period cross conduction event. The SR drive circuit disables the synchronous rectifier in response to receiving the Disable SR signal.

    BI-DIRECTIONAL POWER CONVERTER
    6.
    发明公开
    BI-DIRECTIONAL POWER CONVERTER 审中-公开

    公开(公告)号：EP4369577A1

    公开(公告)日：2024-05-15

    申请号：EP22206648.2

    申请日：2022-11-10

    申请人： Siemens Aktiengesellschaft

    发明人： KADAM, Abhijit

    IPC分类号： H02M1/00 ,  H02M3/335 ,  H02M7/5387

    CPC分类号： H02M1/0058 ,  H02M1/007 ,  H02M7/5387 ,  H02M3/33573 ,  H02M3/33576

    摘要： A bi-directional power converter (102), a control unit (104), a charging device (200) and a method (600) for transferring power between an EV (106) and a power grid are provided. The bi-directional power converter (102) includes an isolated DC-DC converter (102C) having a first stage (201) converting a DC voltage (V1) into a high frequency AC voltage (V1ac), a second stage (202), having four power conversion switches (S5-S8) and capacitors (C1, C2), capable of converting a high frequency AC voltage (V2ac) having an amplitude V2 into the DC voltage (Vdc) having an amplitude of V2 or 2V2 in a power conversion mode, and converting the DC voltage (Vdc) into a multi-level high frequency AC voltage (V2ac) in a power inversion mode, and an intermediary stage (203) electrically coupled to the first and the second stages (201, 202), having a high frequency transformer of a turns ratio V1 :V2.