Fuses having suppressed voltage transients
    2.
    发明授权
    Fuses having suppressed voltage transients 失效
    保险丝抑制电压瞬变

    公开(公告)号:US4873604A

    公开(公告)日:1989-10-10

    申请号:US750216

    申请日:1985-07-01

    IPC分类号: G01K7/22 H01L45/00

    摘要: A shunt device and a method are described for protecting electrical equipment when a fuse blows. The shunt device establishes a by-pass across the fuse for permitting a limited amount of current to begin to flow at a lower voltage than the fuse blowing voltage and before the fuse blows, thereby serving as a transitory relief valve for a portion of the current while minimizing or even substantially eliminating the inductive spike when the fuse blows. The shunt device is made of at least one pyrolyzed polyacrylonitrile (PPP) fiber having a selected switching voltage so that the PPP fiber switches to a low resistance state while the fuse is blowing. When the fuse and PPP characteristics are properly matched, the rate of change of the current with time is lowered, thus selectively decreasing the size of the voltage transients which occur after the fuse blows.

    摘要翻译: 描述了分流装置和方法,用于在保险丝熔断时保护电气设备。 分流装置在保险丝上建立旁路,以允许有限量的电流以比熔丝熔断电压低的电压开始流动,并且在保险丝熔断之前,从而用作电流的一部分的临时溢流阀 同时在保险丝熔断时最小化甚至基本消除电感尖峰。 分流装置由至少一种具有所选择的开关电压的热解的聚丙烯腈(PPP)纤维制成,使得在保险丝熔断时,PPP光纤切换到低电阻状态。 当保险丝和PPP特性正确匹配时,电流随时间的变化率降低,从而选择性地减小保险丝熔断后发生的电压瞬变的大小。

    Method of making an electrical device made of partially pyrolyzed polymer
    3.
    发明授权
    Method of making an electrical device made of partially pyrolyzed polymer 失效
    制造由部分热解的聚合物制成的电气装置的方法

    公开(公告)号:US4856179A

    公开(公告)日:1989-08-15

    申请号:US141077

    申请日:1988-01-05

    IPC分类号: H01L45/00

    摘要: An electrical device is made by partially pyrolyzing polymer material by heating the material to between 500.degree. C. and 800.degree. C. Electrodes are applied to the material at two different locations to define an electrically active element therebetween. The device exhibits negative resistance in a portion of its voltage current domain and function as bi-directional electrical switches.This application is a continuation of application Ser. No. 859,709, filed May 5, 1986, now abandoned, which is a divisional application of application ser. No. 487,401, filed Apr. 21, 1983, now U.S. Pat. No. 4,642,644.

    摘要翻译: 通过将材料加热至500℃至800℃,通过部分热解聚合物材料制成电子器件。电极在两个不同位置施加到材料上以在其间限定电活性元件。 该器件在其电压电流域的一部分中呈现负电阻并且用作双向电开关。 这个应用程序是应用程序的延续。 1986年5月5日提交的第859,709号现在已经放弃,这是一个应用程序的分案申请。 1983年4月21日提交的美国专利第487,401号。 第4,642,644号。

    Electrical device made of partially pryolyzed polymer
    4.
    发明授权
    Electrical device made of partially pryolyzed polymer 失效
    由部分溶胶聚合物制成的电器件

    公开(公告)号:US4642664A

    公开(公告)日:1987-02-10

    申请号:US487401

    申请日:1983-04-21

    IPC分类号: H01L45/00

    CPC分类号: H01L45/00

    摘要: An electrical device is made by partially pyrolyzing polymer material by heating the material to between 500.degree. C. and 800.degree. C. Electrodes are applied to the material at two different locations to define an electrically active element therebetween. Devices made according to the teachings of the disclosure exhibit negative resistance in a portion of their voltage current domain and function as bi-directional electrical switches.

    摘要翻译: 通过将材料加热至500℃至800℃,通过部分热解聚合物材料制成电子器件。电极在两个不同位置施加到材料上以在其间限定电活性元件。 根据本公开的教导制造的器件在其电压电流域的一部分中呈现负电阻并且用作双向电开关。