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    • 81. 发明申请
    • ELECTRICAL CONTROL DEVICES
    • 电气控制装置
    • WO99067866A1
    • 1999-12-29
    • PCT/IB1999/001253
    • 1999-06-22
    • H01C10/10H01H1/06H01H9/54H02H9/02
    • H01H1/065H01C10/10H01C10/106H01F2003/103H01H9/54
    • A current-switching device comprises a contact switch (1), a varistor (2) and a variable-resistance element (3) connected in parallel. The element is made from an electrically conductive soft magnetic powder, e.g. steel, coated with boride, carbide or nitride and immersed in a liquid, such as oil or perfluorinated polyether. the resistance of the element (3) is controlled by the magnetic field of an electromagnet (4). When the current in the main circuit is switched on or off, the electromagnet (4) is energised by a current pulse, which causes the element (3) to become conductive. During the current pulse, the contact switch (1) is either closed or opened, and this arrangement therefore prevents arcing occurring during switching. Alternatively, the element (3) can be connected in series with the contact switch. In this case, the magnet (4) is a combination of an electromagnet and a permanent magnet arranged to provide opposing magnetic fields within the element (3), such that, when the electromagnet is energised, the element (3) is non-conducting.
    • 电流切换装置包括并联连接的接触开关(1),变阻器(2)和可变电阻元件(3)。 元件由导电软磁粉制成,例如, 钢,涂覆有硼化物,碳化物或氮化物,并浸入液体,如油或全氟聚醚。 元件(3)的电阻由电磁体(4)的磁场控制。 当主电路中的电流被接通或断开时,电磁体(4)被电流脉冲激励,这导致元件(3)导通。 在当前脉冲期间,接触开关(1)是闭合的或打开的,因此这种布置防止了在切换期间发生电弧。 或者,元件(3)可以与接触开关串联连接。 在这种情况下,磁体(4)是电磁体和永磁体的组合,其布置成在元件(3)内提供相反的磁场,使得当电磁体通电时,元件(3)是不导电的 。
    • 83. 发明申请
    • FAULT CURRENT LIMITER
    • 故障电流限制
    • WO2013024462A8
    • 2014-04-03
    • PCT/IB2012054196
    • 2012-08-17
    • GRIDON LTDWILSON ROBERTPANNU MOHINDER
    • WILSON ROBERTPANNU MOHINDER
    • H02H9/02
    • H02H9/021H01F29/14H01F38/023H01F2003/103H01F2006/001H02H3/332
    • A fault current limiter is provided that comprises a magnetically saturable core. The first core includes a first leg, a second leg, with a first AC coil wound on the second leg, a third leg, with a second AC coil wound around the third leg, the first and second AC coils being wound in series and connected to a first phase AC source, and a fourth leg. The first magnetic biasing unit is arranged to produce a first closed magnetic circuit in the first leg and the second leg that has a first flux direction, and the second coil is arranged to produce a second closed magnetic circuit in the fourth leg and the third leg that has a second flux direction, wherein the first flux direction opposes the second flux direction. The first and second AC coils are arranged to produce a first closed AC magnetic circuit in the second and third legs in an AC flux direction that alternates with each AC half-cycle.
    • 提供了包括磁饱和芯的故障电流限制器。 第一芯包括第一腿,第二腿,第一腿和第二腿上的第一个交流线圈,第三腿,第二个交流线圈围绕第三个腿缠绕,第一个和第二个交流线圈串联并连接 到第一相AC源和第四支路。 第一磁偏置单元被布置成在第一腿部和第二腿部中产生具有第一磁通方向的第一闭合磁路,并且第二线圈布置成在第四腿部和第三腿部中产生第二闭合磁路 其具有第二磁通方向,其中所述第一磁通方向与所述第二磁通方向相反。 第一和第二AC线圈被布置成在与每个AC半周期交替的AC通量方向上产生第二和第三腿中的第一闭合AC磁路。
    • 84. 发明申请
    • FAULT CURRENT LIMITER
    • 故障电流限制
    • WO2013024462A1
    • 2013-02-21
    • PCT/IB2012/054196
    • 2012-08-17
    • GridON Ltd.WILSON, RobertPANNU, Mohinder
    • WILSON, RobertPANNU, Mohinder
    • H02H9/02
    • H02H9/021H01F29/14H01F38/023H01F2003/103H01F2006/001H02H3/332
    • A fault current limiter is provided that comprises a magnetically saturable core. The first core includes a first leg, a second leg, with a first AC coil wound on the second leg, a third leg, with a second AC coil wound around the third leg, the first and second AC coils being wound in series and connected to a first phase AC source, and a fourth leg. The first magnetic biasing unit is arranged to produce a first closed magnetic circuit in the first leg and the second leg that has a first flux direction, and the second coil is arranged to produce a second closed magnetic circuit in the fourth leg and the third leg that has a second flux direction, wherein the first flux direction opposes the second flux direction. The first and second AC coils are arranged to produce a first closed AC magnetic circuit in the second and third legs in an AC flux direction that alternates with each AC half-cycle.
    • 提供了包括磁饱和芯的故障电流限制器。 第一芯包括第一腿,第二腿,第一腿和第二腿上的第一个交流线圈,第三腿,第二个交流线圈围绕第三个腿缠绕,第一个和第二个交流线圈串联并连接 到第一相AC源和第四支路。 第一磁偏置单元被布置成在第一腿部和第二腿部中产生具有第一磁通方向的第一闭合磁路,并且第二线圈布置成在第四腿部和第三腿部中产生第二闭合磁路 其具有第二磁通方向,其中所述第一磁通方向与所述第二磁通方向相反。 第一和第二AC线圈被布置成在与每个AC半周期交替的AC通量方向上产生第二和第三腿中的第一闭合AC磁路。
    • 88. 发明申请
    • MAGNETIC CIRCUIT DEVICE
    • 磁电路设备
    • WO2006003111A1
    • 2006-01-12
    • PCT/EP2005/052944
    • 2005-06-23
    • AREVA T & D UK LTDSASSE, Christian
    • SASSE, Christian
    • H01F13/00
    • H01F3/10H01F13/003H01F13/006H01F29/14H01F38/023H01F2003/103H01F2006/001
    • In a variety of high power electrical devices, such as fault current limiters, a permanent magnet can be used as part of a magnetic circuit, and its inductance can be altered by passing electrical current through a coil wound around it to change its magnetic polarity or demagnetise it completely. A problem with this is that strong permanent magnets, such as are required in fault current limiters, need high power electric currents to either magnetise or demagnetise them. The invention reduces the power needed to achieve such magnetisation or demagnetisation by dividing the cross-sections of the permanent magnets into a number of smaller permanent magnets (20) connected into the magnetic circuit in parallel with each other, each smaller permanent magnet having a coil (22) wound around it, and each coil being individually connectable to an electrical power supply (24) through switches (26).
    • 在诸如故障电流限制器的各种大功率电气设备中,永磁体可以用作磁路的一部分,并且其电感可以通过使电流通过缠绕在其周围的线圈来改变其电流极性或 完全消磁 这样做的问题是,诸如故障限流器所需的强永磁体需要高功率电流来磁化或消磁它们。 本发明通过将永磁体的横截面彼此平行地分成连接到磁路中的多个较小的永磁体(20)来减小实现这种磁化或消磁所需的功率,每个较小的永磁体具有线圈 (22),并且每个线圈通过开关(26)单独地连接到电源(24)。