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    Überspannungsschutzschaltung
    2.
    发明公开
    Überspannungsschutzschaltung 审中-公开
    过电压保护电路

    公开(公告)号：EP3304671A1

    公开(公告)日：2018-04-11

    申请号：EP16724639.6

    申请日：2016-05-24

    申请人： ebm-papst Mulfingen GmbH & Co. KG

    发明人： SCHNEIDER, Fabian ,  KÖNIG, Daniel

    IPC分类号： H02H9/04 ,  H02H9/06 ,  H01T15/00

    CPC分类号： H02H9/041 ,  H01J17/34 ,  H01T1/14 ,  H01T4/20 ,  H01T15/00 ,  H02H7/09 ,  H02H9/042 ,  H02H9/06

    摘要： The invention relates to an overvoltage protection circuit (1) for protecting the electronics of a motor, in particular an EC motor, against overvoltage pulses, comprising two protective devices (FS1, FS2), which are arranged in series between two connections (10, 20), wherein a resistor (R1) or (R2) is connected in parallel to each of the protective devices (FS1, FS2) and at least one capacitive element (C1) is arranged in parallel with the first protective device (FS1), wherein the overvoltage protection circuit (1) has, between the connections (10, 20), at least a first (lower) and a second (higher) breakdown voltage point at a voltage UZ1 or UZ2 in dependence on the voltage change over time k=(dU/dt) of a voltage UGA at the connections (10, 20).

    ÜBERTEMPERATURSCHUTZ
    3.
    发明公开
    ÜBERTEMPERATURSCHUTZ 审中-公开
    热保护

    公开(公告)号：EP3304667A1

    公开(公告)日：2018-04-11

    申请号：EP16725863.1

    申请日：2016-05-30

    申请人： ebm-papst Mulfingen GmbH & Co. KG

    发明人： BÜRKERT, Martin ,  KAMMLEITER, Steffen ,  HAAS, Günter ,  KÖNIG, Daniel

    IPC分类号： H02H7/085 ,  H02P29/00 ,  H02H1/00 ,  H02H3/05

    CPC分类号： H02H7/0852 ,  H02H1/0038 ,  H02H3/05 ,  H02P29/0241

    摘要： The invention relates to a protective circuit (1) for protecting against overheating of the stator windings (U, V, W) of an EC motor (M), which are connected to a semiconductor output stage (2) and which are designed for the time-offset control of the stator windings (U, V, W) of the motor (M) by means of a driver circuit (7) of an electronic commutation controller for the purpose of a producing a rotating magnetic field, characterized in that the protective circuit (1) is designed having two redundant sensor circuits (10, 20), wherein two resistance-dependent sensor elements (11, 12) connected in series are provided in the first sensor circuit (10) and one resistance-dependent sensor element (21) is provided in the second sensor circuit (20), wherein the first and the second sensor circuits (10) are connected, respectively, to two evaluating circuits (30, 31) and (40, 41) separated from each other, which effect an interruption of the driver circuit (7) preferably by means of switch-off means when a system-specific limit resistance value of the sensor element (11, 12) or (21) associated with the sensor circuit is reached, in order to thereby switch the stator windings (U, V, W) of the motor (M) to a currentless state.