SELF-POWERED ELECTRONIC FUSE WITH STORAGE CAPACITOR THAT CHARGES WITH MINIMAL DISTURBANCE OF LOAD CURRENT THROUGH THE FUSE

    公开(公告)号:EP3471246A1

    公开(公告)日:2019-04-17

    申请号:EP18199341.1

    申请日:2018-10-09

    申请人: IXYS, LLC

    发明人: Neyman, Leonid A.

    摘要: A two-terminal electronic fuse device involves two switches, four diodes, switch control circuitry, and a storage capacitor, connected in a particular topology. When AC current flows through the fuse, a charging current charges the storage capacitor. Energy stored in the storage capacitor is then used to power the switch control circuitry. If the voltage on the storage capacitor drops, then the switches are opened briefly and at the correct time. Opening the switches allows the charging current to flow. By opening the switches and charging the storage capacitor only at times of low current flow through the fuse, the disturbance of load current flowing through the fuse is minimized. If an overload current condition is detected, then the fuse has tripped and first and second switches are opened. If the capacitor does not need charging and there is no overload condition, then the switches remain closed.

    ALARM PROCESSING CIRCUIT
    79.
    发明授权

    公开(公告)号:EP2991228B1

    公开(公告)日:2018-11-14

    申请号:EP15177974.1

    申请日:2015-07-23

    摘要: The invention provides an alarm processing circuit including: a plurality of abnormality detection circuits (9-0 to 9-n) which detect different abnormalities and output alarm signals respectively; signal conversion circuits (13-1 to 13-n) which convert the alarm signals outputted from the plurality of abnormality detection circuits into time signals with unique time widths corresponding to kinds of the abnormalities respectively; and a determination circuit (21) which determines the kinds of the abnormalities respectively based on the time widths of the time signals outputted from the signal conversion circuits. Thus, it is possible to simplify the configuration and reduce the cost.