专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US4028591A Relay contact protector 失效
标题翻译：继电器触点保护器
公开(公告)号：US4028591A
公开(公告)日：1977-06-07
申请号：US624810
申请日：1975-10-22
申请人： David Kahn , Howard Richard Peiffer
发明人： David Kahn , Howard Richard Peiffer
IPC分类号： H01C7/04 , H01H9/54 , H02H7/22 , H02H9/00 , H02H3/00
CPC分类号： H01H9/54 , H01C7/04 , H02H7/222 , H02H9/001
摘要： A polyconductor device is connected in series with a pair of current carrying contacts of a relay switch to delay the current surge through the contacts during the closure thereof. The polyconductor device has a negative temperature-resistance characteristic such that its electrical resistance value at temperatures below a predetermined transition temperature is at least several orders of magnitude larger than its resistance value at temperatures above the transition temperature. When the contacts are initially closed, only a small electric current passes through the polyconductor device which is in its high resistance state. After a predetermined time, the current heats the device to a critical temperature at which time polyconductor device switches to its low resistance state and the current flows essentially unimpeded thereby. During the heat-up time the contacts of the relay switch have completed bouncing and are in a stable, closed condition.
摘要翻译：多导体器件与继电器开关的一对载流触点串联连接，以在闭合期间延迟通过触点的电流浪涌。多导体器件具有负的耐温特性，使得在低于预定转变温度的温度下的电阻值比在高于转变温度的温度下的电阻值至少几个数量级。当触点初始闭合时，只有小的电流通过处于其高电阻状态的多导体器件。在预定时间之后，电流将器件加热到临界温度，此时多晶体器件切换到其低电阻状态，并且电流基本上不受阻碍地流动。在加热时间内，继电器开关的触点已完成弹跳并处于稳定的闭合状态。

IPRDB

热门服务

关于我们

友情链接

联系方式