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    • 2. 发明授权
    • Self-recovering current-limiting device with liquid metal
    • 具有液态金属的自恢复限流装置
    • US06850145B1
    • 2005-02-01
    • US09890503
    • 2000-01-22
    • Wolfgang KremersFrank BergerAndreas Kraetzschmar
    • Wolfgang KremersFrank BergerAndreas Kraetzschmar
    • H02H9/02H01H87/00H01H29/02
    • H01H87/00
    • A self-recovering current-limiting device with a liquid metal includes a first and a second electrode for connection to an electric circuit to be protected. Each of the first and second electrodes are made of a solid metal. A plurality of pressure-resistant insulating bodies is provided, as well as a plurality of insulating intermediate walls supported by the insulating bodies. The plurality of insulating intermediate walls and the plurality of pressure-resistant insulating bodies define a plurality of compression spaces, and the plurality of insulating intermediate walls define a plurality of connecting channels. The plurality of compression spaces are disposed one behind the other between the first and second electrodes and are at least partially filled with the liquid metal. A first connecting conductor connected to the first electrode and disposed below the plurality of compression spaces and having an inverse current direction is provided, as well as a ferromagnetic body disposed above the plurality of compression spaces.
    • 具有液态金属的自恢复限流装置包括用于连接到待保护电路的第一和第二电极。 第一和第二电极中的每一个由固体金属制成。 提供了多个耐压绝缘体,以及由绝缘体支撑的多个绝缘中间壁。 多个绝缘中间壁和多个耐压绝缘体限定多个压缩空间,并且多个绝缘中间壁限定多个连接通道。 多个压缩空间在第一和第二电极之间一个接一个地布置,并且至少部分地被液体金属填充。 提供了连接到第一电极并且设置在多个压缩空间下方并具有逆电流方向的第一连接导体,以及设置在多个压缩空间上方的铁磁体。
    • 3. 发明授权
    • Resettable fuse
    • 可重置保险丝
    • US5963121A
    • 1999-10-05
    • US190032
    • 1998-11-11
    • Vernon E. StygarJesus E. OsunaBrian T. PointerJohn J. Ekis
    • Vernon E. StygarJesus E. OsunaBrian T. PointerJohn J. Ekis
    • H01C7/02H01H85/046H01H87/00H05K1/00H05K1/09H01H71/20H01B1/06H01B1/20H01B1/22
    • H01H87/00H01C7/028H05K1/0293H01H85/046H05K1/095H05K2201/10181
    • The present invention relates to compositions for use in forming resettable electronic circuit protection devices or fuses, methods of forming resettable fuses using the compositions, and resettable fuses formed from the compositions. Resettable fuse compositions according to the present invention include a mixture of the reaction product of polyethylene glycol and a diepoxide having a molecular weight of at least 18,000, solvent, conductive particles, and optional solvent volatility adjusters. In a preferred embodiment, resettable fuses according to the present invention are formed by screen printing the compositions directly onto printed electric circuits to form fuses. During current overload conditions, the temperature of the resettable fuse material rapidly increases due to resistive heating generated by excessive current flow through the conductive particle chains or pathways. In such current overload conditions, resettable fuses according to the present invention rapidly convert from a low resistance solid state to a high resistance liquidus state wherein the chains of conductive particles become highly separated thus causing the flow of electric current through the fuse to become completely cut off. After the overload condition has been cleared, resettable fuses according to the present invention self cool, re-solidify, and return to their prior low resistance solid state without exhibiting any change in resistance or switching temperature due to changes in the degree of crystallinity of the heat cured reaction product.
    • 本发明涉及用于形成可复位电子电路保护装置或保险丝的组合物,使用该组合物形成可复位保险丝的方法,以及由该组合物形成的可重置保险丝。 根据本发明的可重新熔断的组合物包括聚乙二醇和分子量至少为18,000的二环氧化物的反应产物,溶剂,导电颗粒和任选的溶剂挥发性调节剂的混合物。 在优选实施例中,根据本发明的可复位熔断器通过将组合物直接丝网印刷到印刷的电路上形成熔丝来形成熔丝。 在电流过载条件下,由于通过导电粒子链或路径的过大电流产生的电阻加热,可复位熔丝材料的温度迅速增加。 在这种电流过载条件下,根据本发明的可复位熔断器从低电阻固态快速转换为高电阻液相线状态,其中导电颗粒链变得高度分离,从而导致通过保险丝的电流流动完全切断 关闭 在过载状态已经被清除之后,根据本发明的可复位保险丝自身冷却,再固化并返回到其先前的低电阻固态,而不会由于电阻或开关温度的变化而发生任何改变 热固化反应产物。
    • 4. 发明授权
    • Current limiting device
    • 限流装置
    • US5614881A
    • 1997-03-25
    • US514076
    • 1995-08-11
    • Anil R. DuggalLionel M. LevinsonHarold J. PatchenLarry N. Lewis
    • Anil R. DuggalLionel M. LevinsonHarold J. PatchenLarry N. Lewis
    • H01C7/02H01C7/12H01H9/46H01H87/00H02H9/02H01C7/10
    • H01H9/465H01C7/027H01C7/12H02H9/026H01H2033/163
    • A current limiting device utilizing an electrically conductive composite material and an inhomogeneous distribution of resistance structure is disclosed. The inhomogeneous distribution is typically chosen so that at least one selected thin layer of the current limiting device has much higher resistance than the rest of the current limiting device. In the actual device, pressure is typically exerted on the composite material in a direction normal to the selected thin layer. During a short-circuit, it is believed that adiabatic resistive heating of this selected thin layer is followed by rapid thermal expansion which leads to either a partial or complete physical separation of the current limiting device at the selected thin layer which produces a higher over-all device resistance to electric current flow. Thus the current limiting device limits the flow of current through the short-circuited current path. When the short-circuit is cleared, the current limiting device regains its low resistance state allowing electrical current to flow normally. The current limiting of the present invention is reusable for many such short circuit conditions.
    • 公开了一种使用导电复合材料和电阻结构不均匀分布的限流装置。 通常选择不均匀分布,使得限流装置的至少一个选定的薄层比电流限制装置的其余部分具有高得多的电阻。 在实际的装置中,通常在垂直于所选薄层的方向上对复合材料施加压力。 在短路期间,相信该选择的薄层的绝热电阻加热之后是快速热膨胀,其导致在所选择的薄层处限流器件的部分或完全物理分离,其产生较高的过电压, 所有器件阻抗电流流动。 因此,限流装置限制了通过短路电流路径的电流流动。 当短路被清除时,限流装置恢复其低电阻状态,允许电流正常流动。 本发明的电流限制对于许多这样的短路条件是可重用的。
    • 5. 发明授权
    • Current limiting device
    • 限流装置
    • US3987388A
    • 1976-10-19
    • US594008
    • 1975-07-08
    • Lutz Niemeyer
    • Lutz Niemeyer
    • H01H37/76H01H87/00
    • H01H87/00
    • A current limiting device includes a duct containing a current-limiting material therein which serves to interconnect two spaced terminals but which is evaporable when subjected to an over-current flowing through the material between the terminals. The wall forming this duct includes a region made from a highly-temperature-resistant material which has a relatively small cross-section that connects with another region of the duct having a larger cross-section, and the wall part forming the region of smaller cross-section is surrounded by a resistor member connected electrically in parallel with the current-limiting material disposed therein and which has a resistance value such that the current-limiting material is relieved of current following onset of an over-current condition.
    • 限流装置包括在其中含有限流材料的管道,其用于互连两个间隔开的端子,但是当受到流过端子之间的材料的过电流时,其可蒸发。 形成该管道的壁包括由耐高温材料制成的区域,其具有与具有较大横截面的管道的另一区域连接的相对较小的横截面,并且壁部分形成较小十字形的区域 所述电阻元件由与其中设置的限流材料并联电连接的电阻元件围绕,并且具有电阻值,使得限流材料在过电流状态开始之后被释放。