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    Electromagnetic contactor with control circuit for providing acceleration, coast and grab functions
    61.
    发明授权
    Electromagnetic contactor with control circuit for providing acceleration, coast and grab functions 失效
    带控制电路的电磁接触器，用于提供加速，滑行和抓取功能

    公开(公告)号：US4720763A

    公开(公告)日：1988-01-19

    申请号：US16419

    申请日：1987-02-19

    申请人： James A. Bauer

    发明人： James A. Bauer

    IPC分类号： H01H50/00 ,  H01H47/00 ,  H01H47/22 ,  H01H47/32 ,  H01H50/34 ,  H01H51/30 ,  H01H47/26 ,  G01R19/00 ,  H01H9/00

    CPC分类号： H01H47/325 ,  H01F2007/1894 ,  H01H47/22

    摘要： An electromagnetic contactor or controller is taught in which the voltage which is impressed across the electromagnetic armature accelerating coil is compared by a microprocess against a menu of memory stored voltages with related delay angles. The delay angles are utilized to alter the conduction interval of a triac or similar gated device which is connected in series circuit relationship with the coil in question. During an ACCELERATION interval a number of consecutive full-wave rectified half-cycles of voltage pulses are phase angle or delay angle controlled so that the amount of energy provided to the moving armature of the contactor is approximately sufficient to cause the armature to abut a fixed magnetic member. Furthermore, there is provided a separate memory menu for mid-flight adjustment of the armature to compensate for unknown variations to fine tune the closing operation. This latter correction is known as COAST. There is also provided a GRAB function which supplies limited, relatively low level current to the armature at or near the time of abutment for preventing "bounce". Mechanically, interconnected with the armature is a set of contacts which are caused to close upon an external circuit for providing a useful function in response to the movement of the armature.

    Switching system of an electrical device
    64.
    发明授权
    Switching system of an electrical device 有权

    公开(公告)号：US11948765B2

    公开(公告)日：2024-04-02

    申请号：US17695888

    申请日：2022-03-16

    申请人： Schneider Electric Industries SAS

    发明人： Philippe Picot ,  Mathieu Bono ,  Stéphane Follic ,  Philippe Schuster

    IPC分类号： H01H50/16 ,  H01H47/22 ,  H01H50/56

    CPC分类号： H01H50/16 ,  H01H47/22 ,  H01H50/56

    摘要： A switching system for switching an electrical device, comprising: a vacuum interrupter including a fixed electrode, and a mobile electrode, the mobile electrode configured to move between a closed position and an open position. The switching system further comprising an elastic return means configured to apply a driving force to the mobile electrode, and a retaining member for retaining the elastic return means, the retaining member configured to move from a retention configuration, in which the elastic return means is immobilized, into a movement configuration, in which the elastic return means is released. The switching system is configured so that the mobile electrode moves from the closed position to the open position under the action of the elastic return means when the retaining member leaves its retention configuration.

    Electromagnetic relay
    65.
    发明授权
    Electromagnetic relay 有权

    公开(公告)号：US11948764B2

    公开(公告)日：2024-04-02

    申请号：US17012002

    申请日：2020-09-03

    申请人： OMRON Corporation

    发明人： Naoki Kawaguchi ,  Ryota Minowa ,  Hiroyuki Harimochi ,  Shinichi Ogawa ,  Kohei Otsuka ,  Hiroyuki Iwasaka

    IPC分类号： H01H3/00 ,  H01H47/00 ,  H01H47/22 ,  H01H50/54

    CPC分类号： H01H47/22 ,  H01H47/002 ,  H01H50/54

    摘要： The electromagnetic relay includes a fixed terminal, a fixed contact connected to the fixed terminal, a movable contact piece moving in an opening direction and a closing direction with respect to the fixed terminal, a movable contact connected to the movable contact piece and being arranged to face the fixed contact, a coil generating an electromagnetic force to move the movable contact piece, and a drive circuit controlling a current to the coil. The drive circuit increases the current at a first increase rate in a first period that includes a period from a start time when the current starts to flow in the coil to before a contact time point at which the movable contact contacts the fixed contact. The drive circuit increases the current at a second increase rate larger than the first increase rate in the second period that includes a period after the contact time point.

    RELAY PROTECTIVE DEVICE, CONSTRUCTION MACHINE, RELAY PROTECTION CONTROL METHOD AND APPARATUS
    68.
    发明公开
    RELAY PROTECTIVE DEVICE, CONSTRUCTION MACHINE, RELAY PROTECTION CONTROL METHOD AND APPARATUS 审中-公开

    公开(公告)号：US20230352257A1

    公开(公告)日：2023-11-02

    申请号：US17800713

    申请日：2021-02-07

    申请人： XUZHOU XCMG EXCAVATOR MACHINERY CO., LTD

    发明人： Yadong LI ,  Jiawen GENG ,  Jian ZHANG ,  Bujun DONG ,  Yuzhong DONG ,  Fanjian MENG ,  Feifei ZHAO ,  Meng WEN

    IPC分类号： H01H47/22

    CPC分类号： H01H47/22 ,  H01H2047/025

    摘要： The present invention relates to a relay protective device, a construction machine, a relay protection control method and apparatus, and a computer readable storage medium. The relay protective device includes: a power supply input contact; a relay protective module comprising a bistable relay and an output contact, wherein the bistable relay comprises a contact, a pull-in coil, and a release coil; an input terminal of the contact, an input terminal of the pull-in coil, and an input terminal of the release coil are connected to the power supply input contact; an output terminal of the contact is connected to the output contact; and a central control unit comprising a first port connected to the output contact, a second port connected to an output terminal of the pull-in coil, and a third port connected to an output terminal of the release coil; the central control unit is used for controlling the pull-in coil and the release coil to be alternately powered on so as to oscillate the contact when a voltage of the output contact is less than a first threshold and is not less than a second threshold, wherein the first threshold is less than a standard working voltage of the bistable relay, and the second threshold is the minimum allowable working voltage of the bistable relay.

    CONTACTOR CONTROL
    69.
    发明公开
    CONTACTOR CONTROL 审中-公开

    公开(公告)号：US20230335359A1

    公开(公告)日：2023-10-19

    申请号：US18044591

    申请日：2021-08-06

    申请人： ABB Schweiz AG

    发明人： Gunnar Johansson

    IPC分类号： H01H47/00 ,  H01H47/22

    CPC分类号： H01H47/002 ,  H01H47/22

    摘要： A method of controlling a mechanical contactor including at least one pair of contacts for conducting a mains current (Im) when the contactor is in a closed position, and an electromagnet arranged to close the contactor, and maintain the contactor in the closed position, by forcing the pair of contacts towards each other when a control current (Ic) runs through a coil of the electromagnet. The method includes, while the contactor is in the closed position, obtaining an indication of unintentional separation of the contacts, and in response to the obtained indication, opening the contactor and maintaining the contactor in an open position by turning off the control current.