MANAGEMENT OF SETTING CHANGE PROPAGATION IN NETWORKED DEVICES

    公开(公告)号:US20220103549A1

    公开(公告)日:2022-03-31

    申请号:US17037145

    申请日:2020-09-29

    Abstract: A computer-implemented method is provided to automatically adjust a device setting of a plurality of networked devices. The method includes performing autonomously at a device of the plurality of networked devices, receiving a request to update a device setting to a new value, comparing a characteristic of the plurality of networked devices to a corresponding characteristic of the device, determining one or more similar devices of the plurality of devices that satisfy a similarity criteria based on a result of the comparison, and accessing the one or more similar devices to change the device setting of the one or more similar devices to the new value.

    AC EVSE cluster load balancing system

    公开(公告)号:US11447027B2

    公开(公告)日:2022-09-20

    申请号:US16516580

    申请日:2019-07-19

    Abstract: A method, apparatus and computer program product resolve the problem of unbalanced loads in an EVSE cluster of multiple EVSE charging stations. A signal is provided to the EVSEs identifying which phase of the three-phase power source has the highest current. When one of the EVSEs in the cluster determines whether it is connected to an EV's on board charging device, determines whether it is already charging the connected EV, and determines whether the EVSE is using the phase that has the highest current, then the EVSE may transmit a cluster load balancing control signal as a control pilot signal to the EV's onboard charging device to adjust the charging rate of the current that the EV is consuming from the EVSE.

    Current measurement compensation for harmonics

    公开(公告)号:US11333690B2

    公开(公告)日:2022-05-17

    申请号:US16715573

    申请日:2019-12-16

    Abstract: A measurement module uses harmonic compensation factors to minimize the effects of harmonic distortion in measurements of a source current by a current sensor of the module. The module samples at a first sampling rate, measurements of the source current to generate a first current measurement. The module samples at a second sampling rate higher than the first sampling rate, for an interval of time, measurements of the source current to generate a second current measurement. The module determines a harmonic compensation factor based, at least, on a difference between the first current measurement and the second current measurement. The module determines a reported current computed as a function of at least the first current measurement, the difference between the first current measurement and the second current measurement, and the harmonic compensation factor. The reported current represents a magnitude of the source current adjusted by the harmonic compensation factor.

    INDUCTION MOTOR LONG START PROTECTION
    8.
    发明申请
    INDUCTION MOTOR LONG START PROTECTION 审中-公开
    感应电机长期起动保护

    公开(公告)号:US20170047869A1

    公开(公告)日:2017-02-16

    申请号:US14822675

    申请日:2015-08-10

    CPC classification number: H02P1/26 H02P1/00

    Abstract: Method and system for protecting induction motors from stalled start conditions provide a motor overload protection device that includes a stalled start detector capable of differentiating long start from stalled start conditions. This helps the motor overload protection device identify a stalled start condition right away and trip immediately rather than allowing the motor to continue drawing locked rotor current for the duration of the startup interval. Such a motor overload protection device may be used with any suitable multiphase induction motors, including two-phase motors, three phase motors, and the like. And because only the motor phase currents are used to detect the stalled start condition, the motor overload protection device disclosed herein does not require voltage phase shift information and/or motor speed measurements, thereby simplifying overall management of the motor.

    Abstract translation: 用于保护感应电机免于停止起动条件的方法和系统提供了一种电动机过载保护装置,其包括一个停止的启动检测器,能够将起动时间从停止的启动条件区分开来。 这有助于电机过载保护装置立即识别出停止的启动条件,并立即跳闸,而不是允许电机在启动间隔期间继续拉动锁定的转子电流。 这种电动机过载保护装置可以与任何合适的多相感应电动机一起使用,包括两相电动机,三相电动机等。 并且,由于仅使用电动机相电流来检测停止的起动条件,因此本文公开的电动机过载保护装置不需要电压相移信息和/或电动机速度测量,从而简化了电动机的总体管理。

    Progressive protection functions for motor overload relay

    公开(公告)号:US10985550B1

    公开(公告)日:2021-04-20

    申请号:US16654205

    申请日:2019-10-16

    Abstract: A progressive protection method automatically adapts a protection trip delay or fault timeout for a motor that is a member of a group of motors performing mutually similar or related tasks, based on the occurrence of a fault in another motor within the group, without requiring manual intervention. If the user requires stringent protection of the motors in a particular application, then the trip delay time for all of the motors in the group, may be shortened in response to recently-detected similar trips of other motors within the group. Alternatively, if the user prefers continuity of service for a particular application, then the trip delay time for all of the motors in the group, may be increased in response to recently-detected similar trips of other motors within the group, based on past experience with the occurrence of fault self-clearing for the motors in the group.

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