“限流电路”和“分压电路”有何区别?谁有简单易懂的方法?推荐一下!谢谢了,大神帮忙啊

2025-03-15 11:54:02
推荐回答(5个)
回答1:

限流电路是指用某种电路或元件使得在电路正常工作或失常时电流不超出某个设定值,类似保险丝但不一定要烧断。分压电路是指从一较高电压电路中利用分压原理取得所需较低电压。两者有时结构甚至电路参数相同,但作用不同,设计思路也不同。如接发光二极管,如果电源电压较高,需串电阻或多个管分压,这个电阻既分压又限流。如电压正合适,也需串限流电阻-因发光管导通前后有负阻特性。日光灯镇流器也是一典型的限流电路,同时也起分压作用。

回答2:

限流电路和分压电路都是串联电路 如果要求电压是从零伏调起的,或者是要求电压调节范围较大的情况,就应该选择分压电路,其分压电阻尽量选择阻值较小并且允许电流较大的滑线变阻器。如果没有上述电压的限制,分压电路与限流电路都可以的情况下,应该首选限流电路。

回答3:

“限流电路”是串联电路。 “分压电路”是并联电路。

回答4:

由限流电阻和短路开关组成的并联电路称为限流电路。稳压二极管串联一个电阻,这个电阻就是限流电阻,与稳压二极管组成限流电路。 串联电路的分压规律是: U1:U2:*******:Un=R1:R2:*******:Rn ,U=U1+U2+******+Un 也就是说串联电路中电阻大的用电器分得的电压大. 这两种电路都是在回路中串联一个电阻来实现。

回答5:

最简单的限流电路,用一支电阻串在电路中即可完成,改变电阻的阻值,就可以改变输出端电流的大小。 最简单的分压电路,要用两支电阻才能完成,一支串在电路中另一支要接在电流的流出端和地之间,调整它的阻值可以改变输出端电压的高低。

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