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    汽车继电器为什么能小电流控制大电流?

    文章来源:继电器 人气:9985 发表时间:2023-02-05

    在很多没有经过系统学习的人对汽车继电器为什么能小电流控制大电流这个基础的理论而感到好奇,那么在这里就满足大家这个好奇心。



    汽车继电器为什么能小电流控制大电流的原理图


      如图所以,为了更方便的理解我们把电路分为两部分,低电压(小电流)电路和高电压(大电流)电路。图中电源、开关S1、线圈是低电压电路部分;触点、负荷电源、用电器是高电压电路部分。

      当开关S1闭合,低电压电路接通,电流从电源正极流经开关S1,再经过线圈到达电源负极。电流经过线圈产生磁力,这就是电生磁的过程,磁力把铁片吸引过来,高压电路中可动触点与固定触点闭合,高压电路形成回路,负荷电源给用电器供电。当开关S1断开,线圈不再产生磁力,对铁片没有了吸引力。复位弹簧因弹力作用断开高压电路中的触点,负荷电源停止给用电器供电,用电器停止工作。

      以上基本上就是汽车继电器为什么能小电流控制大电流的原理,若是对磁生电感兴趣,您还可以继续拿出那颗爱学习的心,继续探索吧!

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