【電位(wei)器接法】電位(wei)器的(de)工作(zuo)原理是什么 電位(wei)器怎么接
電位器怎么接
一般的電位器,中間(jian)的(de)是(shi)動片,所以測量電(dian)阻(zu)的(de)話1。3腳是(shi)總電(dian)阻(zu),動片動不(bu)動阻(zu)值都不(bu)會變,接12,阻(zu)值從順時針方向(xiang)變大(動片動的(de)話),接2,3就是(shi)反的(de).6個(ge)(ge)腳叫雙聯電(dian)位器,就是(shi)2個(ge)(ge)單聯做在(zai)一(yi)起了(le),8腳的(de)應該是(shi)帶了(le)一(yi)個(ge)(ge)開關,一(yi)般在(zai)汽車音(yin)響上用的(de)教(jiao)多。
電位器的工作原理是什么
電(dian)(dian)(dian)(dian)位(wei)(wei)器(qi)(qi),是(shi)用(yong)(yong)于分(fen)壓(ya)的(de)可變(bian)電(dian)(dian)(dian)(dian)阻(zu)器(qi)(qi)。在裸露(lu)的(de)電(dian)(dian)(dian)(dian)阻(zu)體上(shang),緊壓(ya)著(zhu)一至兩個(ge)可移金屬(shu)觸點(dian)(dian)。觸點(dian)(dian)位(wei)(wei)置(zhi)確定電(dian)(dian)(dian)(dian)阻(zu)體任一端與(yu)觸點(dian)(dian)間的(de)阻(zu)值。按(an)材(cai)料分(fen)線(xian)繞、炭(tan)膜、實芯式(shi)(shi)電(dian)(dian)(dian)(dian)位(wei)(wei)器(qi)(qi);按(an)輸出與(yu)輸入電(dian)(dian)(dian)(dian)壓(ya)比與(yu)旋(xuan)轉角度的(de)關系(xi)分(fen)直線(xian)式(shi)(shi)電(dian)(dian)(dian)(dian)位(wei)(wei)器(qi)(qi)(呈(cheng)線(xian)性關系(xi))、函數(shu)電(dian)(dian)(dian)(dian)位(wei)(wei)器(qi)(qi)(呈(cheng)曲線(xian)關系(xi))。主要參(can)數(shu)為阻(zu)值、容(rong)差、額定功率。廣泛用(yong)(yong)于電(dian)(dian)(dian)(dian)子(zi)設備,在音響和(he)接收(shou)機(ji)中作音量控制(zhi)用(yong)(yong)。
當電阻體的兩個固定觸電之間外加一個電壓時,通過轉動或滑動系統改變觸點在電阻體上的位置(zhi),在動(dong)觸(chu)(chu)點(dian)(dian)與(yu)固(gu)定(ding)觸(chu)(chu)點(dian)(dian)之間便可(ke)得到一(yi)(yi)(yi)(yi)個(ge)(ge)(ge)(ge)與(yu)動(dong)觸(chu)(chu)點(dian)(dian)位置(zhi)成(cheng)一(yi)(yi)(yi)(yi)定(ding)關系(xi)(xi)的電(dian)壓(ya)(ya)。它大(da)多(duo)是用作分壓(ya)(ya)器(qi),這(zhe)是電(dian)位器(qi)是一(yi)(yi)(yi)(yi)個(ge)(ge)(ge)(ge)四端元件。電(dian)位器(qi)基本上就(jiu)是滑動(dong)變阻(zu)器(qi),有幾種樣式,一(yi)(yi)(yi)(yi)般用在音箱音量(liang)開關和激光頭(tou)功率大(da)小(xiao)調節電(dian)位器(qi)是一(yi)(yi)(yi)(yi)種可(ke)調的電(dian)子(zi)元件。它是由一(yi)(yi)(yi)(yi)個(ge)(ge)(ge)(ge)電(dian)阻(zu)體和一(yi)(yi)(yi)(yi)個(ge)(ge)(ge)(ge)轉動(dong)或(huo)滑動(dong)系(xi)(xi)統組成(cheng)。當電(dian)阻(zu)體的兩個(ge)(ge)(ge)(ge)固(gu)定(ding)觸(chu)(chu)電(dian)之間外加一(yi)(yi)(yi)(yi)個(ge)(ge)(ge)(ge)電(dian)壓(ya)(ya)時,通過轉動(dong)或(huo)滑動(dong)系(xi)(xi)統改(gai)變觸(chu)(chu)點(dian)(dian)在電(dian)阻(zu)體上的位置(zhi),在動(dong)觸(chu)(chu)點(dian)(dian)與(yu)固(gu)定(ding)觸(chu)(chu)點(dian)(dian)之間便可(ke)得到一(yi)(yi)(yi)(yi)個(ge)(ge)(ge)(ge)與(yu)動(dong)觸(chu)(chu)點(dian)(dian)位置(zhi)成(cheng)一(yi)(yi)(yi)(yi)定(ding)關系(xi)(xi)的電(dian)壓(ya)(ya)。
電位器型號規格
線繞電位器(qi):WXX、WX1、WX3、WXW1—1、WXJ2、WXJ4、WX—010.030.050、WX1.5—1、WXDJ—1、WX5—11。實芯(xin)電位器(qi);WS、WS5、WSW30。
合(he)成(cheng)碳膜(mo)電位器:WTH、WH5、WH7、WH9、WH15、WH17、WT、WT—1、WT—3、WTX—3、WHJ、WHJ—X、WHW、WH—20、WI。
分辨力
分辨力決定于電位器的(de)(de)理論精度。對(dui)于線繞電(dian)(dian)位器和線性(xing)(xing)電(dian)(dian)位器來說,分(fen)(fen)(fen)辨(bian)(bian)力(li)是用(yong)動觸點在繞組(zu)(zu)上每移動一匝(za)所引起的(de)(de)電(dian)(dian)阻變化量與(yu)總電(dian)(dian)阻的(de)(de)百分(fen)(fen)(fen)比表示。對(dui)于具有函(han)數(shu)特性(xing)(xing)的(de)(de)電(dian)(dian)位器來說,由(you)于繞組(zu)(zu)上每一匝(za)的(de)(de)電(dian)(dian)阻不(bu)同,故(gu)分(fen)(fen)(fen)辨(bian)(bian)力(li)是個變量。此時(shi),電(dian)(dian)位器的(de)(de)分(fen)(fen)(fen)辨(bian)(bian)力(li)一般是指(zhi)函(han)數(shu)特性(xing)(xing)曲線上斜(xie)率最大一段的(de)(de)平均分(fen)(fen)(fen)辨(bian)(bian)力(li)。