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    Resettable electronic fuse for high-power devices
    3.
    发明授权
    Resettable electronic fuse for high-power devices 有权

    公开(公告)号：US11967817B2

    公开(公告)日：2024-04-23

    申请号：US17051504

    申请日：2020-07-17

    申请人： MILWAUKEE ELECTRIC TOOL CORPORATION

    发明人： Jeffrey M. Brozek ,  Benjamin Tesch ,  Chien-Chih Chao

    IPC分类号： H02H3/087 ,  H02H3/06 ,  H02H5/04 ,  H02H7/18

    CPC分类号： H02H3/087 ,  H02H5/047 ,  H02H7/18 ,  H02H3/066

    摘要： A resettable electronic fuse for a high-power device such as a power tool, a battery pack for the power tool, or a battery pack charger. The resettable electronic fuse is connected in a current path of the device and is operable or configured to selectively interrupt current through the resettable electronic fuse based on a detected condition of the device (e.g., a detected fault condition of the device). The resettable electronic fuse is also configured to be reset after a detected fault condition has ended. In some embodiments, the resettable electronic fuse is configured to reset itself. In other embodiments, the resettable electronic fuse is configured to receive a signal (e.g., from a device controller) to reset.

    Undervoltage protection and control circuit for electronic switches
    5.
    发明授权
    Undervoltage protection and control circuit for electronic switches 有权

    公开(公告)号：US11831148B2

    公开(公告)日：2023-11-28

    申请号：US17465528

    申请日：2021-09-02

    申请人： Infineon Technologies AG

    发明人： Michael Asam

    IPC分类号： H02H3/247 ,  H02H3/06

    CPC分类号： H02H3/247 ,  H02H3/066

    摘要： A method for operating an electronic switch is described hereinafter. According to one exemplary embodiment, the method (for an electronic switch in the switched on state) comprises detecting whether there is an undervoltage condition at a supply voltage node and providing an undervoltage signal which indicates an undervoltage condition. The method further comprises switching off the electronic switch if the undervoltage signal indicates an undervoltage condition and switching (back) on the electronic switch if the undervoltage signal no longer indicates an undervoltage condition. If the undervoltage signal indicates an undervoltage condition during a switch-on process of the electronic switch, the electronic switch is switched off again and switching back on is prevented for a defined period of time, irrespective of the undervoltage signal. Moreover, a corresponding circuit is described.

    Normally open tie pulse testing
    6.
    发明授权
    Normally open tie pulse testing 有权

    公开(公告)号：US11728638B2

    公开(公告)日：2023-08-15

    申请号：US17489947

    申请日：2021-09-30

    申请人： S&C Electric Company

    发明人： Michael John Meisinger, Sr. ,  David Klein

    IPC分类号： H02H3/06 ,  H02H3/08

    CPC分类号： H02H3/06 ,  H02H3/083

    摘要： A control system and method for tie point fault interrupter and sectionalizing recloser devices in an electrical grid feeder. The technique enables automated sectionalizing reclosers equipped with three-phase current sensing and single- or three-phase voltage sensing, and able to detect pulse-closing operations, to isolate faults and restore load based on pulse count rather than requiring source re-energization and waiting for loss of voltage timers. The system includes a fault interrupter initiating a pulse-testing sequence upon detecting loss of voltage, where a number of preliminary pulses are used to distinguish transient faults from persistent faults, and pulses are counted by the sectionalizing reclosers to determine which of these devices should open. An alternate configuration is disclosed for reinitializing faults, including the fault interrupter closing if initial pulse testing indicates no fault, and subsequent cycles cause a sectionalizing recloser adjacent the fault to open, allowing the fault interrupter to close and hold.

    Method for locating and isolating a fault in a power distribution network
    7.
    发明授权
    Method for locating and isolating a fault in a power distribution network 有权

    公开(公告)号：US11719736B2

    公开(公告)日：2023-08-08

    申请号：US17501136

    申请日：2021-10-14

    申请人： S&C Electric Company

    发明人： Boris Marendic ,  Yoav Sharon

    IPC分类号： G01R31/08 ,  H02H3/06 ,  H02H7/26

    CPC分类号： G01R31/086 ,  H02H3/063 ,  H02H7/261

    摘要： A method for fault location and isolation in a power distribution network, where the network includes a plurality of switching devices provided along a feeder, and at least one of the switching devices does not have voltage sensing capabilities. The method includes detecting an overcurrent event in the network from the fault and interrupting the overcurrent event by opening and then immediately locking out or subsequently reclosing and testing the fault. A count value is increased in each switching device that detected the overcurrent event. A message is sent from each of the switching devices that detected the overcurrent event and then detected the loss of voltage upstream to an upstream neighbor switching device. Current measurements in the messages, measured current by the devices and the counts values in the devices determine what devices are opened to isolate the fault.

    Test-Boost Electric Power Recloser
    10.
    发明申请
    Test-Boost Electric Power Recloser 有权

    公开(公告)号：US20230023693A1

    公开(公告)日：2023-01-26

    申请号：US17746416

    申请日：2022-05-17

    申请人： Southern States, LLC

    发明人： Jiyuan Fan ,  Steve Hua Fan ,  Tan Tran ,  Joseph R. Rostron ,  Buddy Reneau

    IPC分类号： H02H3/06 ,  H02H1/00

    摘要： Embodiments of the present invention include a test-boost electric power recloser that limits the duration of the test current imposed on the power line to less than two electric power cycles, and preferably less than one electric power cycle, when attempting to reclose into a fault. The test-boost recloser sends a test pulse causing a non-latching close followed by a boost pulse causing a latching close if waveform analysis based on the test close indicates that the fault has likely cleared. The test-boost approach can typically be implemented through a software and calibration upgrade to a conventional single-coil recloser, accomplishing results comparable to a dual-actuator recloser at a much lower cost. The recloser may perform iterative and feedback learning feedback processes to automatically improve its operation over time in response to measured fault and non-fault conditions and its success in predicting whether faults have cleared.