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數字電位器行業簡介

一、電位器怎么接線

電(dian)(dian)(dian)(dian)位(wei)器(qi)(qi)是一(yi)種(zhong)電(dian)(dian)(dian)(dian)子元(yuan)器(qi)(qi)件(jian)，一(yi)般(ban)具有三(san)個(ge)(ge)引出(chu)(chu)端(duan)，由滑(hua)動軸(zhou)（滑(hua)片）、電(dian)(dian)(dian)(dian)阻(zu)體(ti)、外(wai)殼電(dian)(dian)(dian)(dian)阻(zu)體(ti)以及三(san)個(ge)(ge)引出(chu)(chu)端(duan)等組(zu)成，旋轉滑(hua)動軸(zhou)阻(zu)值(zhi)會發生(sheng)變化并且(qie)按照某種(zhong)變化規律變化，同時在(zai)在(zai)輸(shu)出(chu)(chu)端(duan)獲得與(yu)位(wei)移量成一(yi)定關系(xi)的電(dian)(dian)(dian)(dian)阻(zu)值(zhi)或其(qi)他物理量。如(ru)果按照按阻(zu)值(zhi)輸(shu)出(chu)(chu)函數(shu)特性來區分電(dian)(dian)(dian)(dian)位(wei)器(qi)(qi)的話可分為直線式電(dian)(dian)(dian)(dian)位(wei)器(qi)(qi)、指數(shu)式電(dian)(dian)(dian)(dian)位(wei)器(qi)(qi)和對數(shu)式電(dian)(dian)(dian)(dian)位(wei)器(qi)(qi)三(san)種(zhong)。

電(dian)(dian)位(wei)(wei)器的接(jie)(jie)線方法是：對于一(yi)般(ban)的電(dian)(dian)位(wei)(wei)器，靠(kao)近中(zhong)心的是滑(hua)片(pian)，中(zhong)心頭里面就是一(yi)根電(dian)(dian)阻絲(si)，跟電(dian)(dian)阻絲(si)兩端(duan)兩個(ge)引(yin)腳(jiao)直(zhi)接(jie)(jie)連起來(lai)，這兩個(ge)引(yin)腳(jiao)分別連接(jie)(jie)輸(shu)入(ru)信號和地（有些不接(jie)(jie)），比如一(yi)個(ge)引(yin)腳(jiao)連輸(shu)入(ru)信號，另一(yi)個(ge)管腳(jiao)接(jie)(jie)地，此時這電(dian)(dian)阻絲(si)兩段上就有了總的電(dian)(dian)阻值(zhi)(zhi)，如果用滑(hua)片(pian)在這根電(dian)(dian)阻絲(si)上來(lai)回滑(hua)動就可以獲得變(bian)化的阻值(zhi)(zhi)了，但是如果輸(shu)入(ru)和輸(shu)出信號接(jie)(jie)反，那么滑(hua)片(pian)滑(hua)動方向與阻值(zhi)(zhi)變(bian)化相反。

二、電位器的作用是什么

1、用作分壓器

電(dian)位器是一個連續(xu)可(ke)(ke)調(diao)的電(dian)阻(zu)器，當調(diao)節電(dian)位器的轉柄(bing)或(huo)滑(hua)柄(bing)時(shi)，動(dong)觸點在(zai)電(dian)阻(zu)體上滑(hua)動(dong)。此時(shi)在(zai)電(dian)位器的輸出端可(ke)(ke)獲得與電(dian)位器外(wai)加電(dian)壓和可(ke)(ke)動(dong)臂轉角或(huo)行程成(cheng)一定(ding)關系(xi)的輸出電(dian)壓。

2、用作變阻器

電位器(qi)用作(zuo)變(bian)阻(zu)器(qi)時，應把它接成兩端器(qi)件，這(zhe)樣花電位器(qi)的行程范圍內，便可獲得一(yi)個平滑連續變(bian)化(hua)的電阻(zu)值。

3、用作電流控制器

當(dang)電(dian)位器作為電(dian)流控制(zhi)器使用時，其中一個選(xuan)定(ding)的電(dian)流輸出端必(bi)須是滑動觸點引出端。

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三、電位器三個引腳怎么接

兩邊(bian)的引腳分別接輸入和地(di)，中間引腳用來獲得(de)電位。

電位(wei)器是具有(you)三個引出端、阻(zu)值可(ke)按某種變(bian)化規律調節的電阻(zu)元件(jian)。電位(wei)器通常由電阻(zu)體和(he)可(ke)移動的電刷組(zu)成。

當電(dian)(dian)(dian)(dian)(dian)刷沿(yan)電(dian)(dian)(dian)(dian)(dian)阻體(ti)移(yi)動(dong)時，在輸(shu)出端即獲得(de)(de)與位(wei)移(yi)量成(cheng)一(yi)定(ding)關(guan)(guan)系的電(dian)(dian)(dian)(dian)(dian)阻值或電(dian)(dian)(dian)(dian)(dian)壓(ya)。由于它在電(dian)(dian)(dian)(dian)(dian)路中的作用是(shi)獲得(de)(de)與輸(shu)入電(dian)(dian)(dian)(dian)(dian)壓(ya)（外加電(dian)(dian)(dian)(dian)(dian)壓(ya)）成(cheng)一(yi)定(ding)關(guan)(guan)系得(de)(de)輸(shu)出電(dian)(dian)(dian)(dian)(dian)壓(ya)，因(yin)此稱之為(wei)電(dian)(dian)(dian)(dian)(dian)位(wei)器。

四、電位器的測量方法是什么

1、標稱阻值的檢測

測量(liang)(liang)時(shi)，選用(yong)萬用(yong)表電阻檔的適(shi)當量(liang)(liang)程，將兩表筆分別接(jie)在電位器兩個固定引腳焊片之間，先測量(liang)(liang)電位器的總(zong)阻值(zhi)(zhi)(zhi)是否與標(biao)稱阻值(zhi)(zhi)(zhi)相同(tong)。若(ruo)測得的阻值(zhi)(zhi)(zhi)為無窮大(da)或較(jiao)標(biao)稱阻值(zhi)(zhi)(zhi)大(da)，則說明該電位器已開(kai)路(lu)或變(bian)值(zhi)(zhi)(zhi)損(sun)壞(huai)。

2、帶開關電位器的檢測

對于帶開(kai)關的(de)電(dian)位(wei)器(qi)，除應按(an)以上方法(fa)檢(jian)(jian)測電(dian)位(wei)器(qi)的(de)標稱阻值及接觸情況外，還應檢(jian)(jian)測其開(kai)關是否(fou)正常。先旋轉電(dian)位(wei)器(qi)軸(zhou)柄，檢(jian)(jian)查(cha)開(kai)關是否(fou)靈活，接通、斷(duan)開(kai)時是否(fou)有(you)清脆(cui)的(de)“喀噠(da)”聲。

3、雙連同軸電位器的檢測

用(yong)萬用(yong)表電(dian)(dian)阻(zu)檔的適當量(liang)程，分(fen)別測量(liang)雙連電(dian)(dian)位器上兩組(zu)電(dian)(dian)位器的電(dian)(dian)阻(zu)值(zhi)（即A、C之(zhi)間的電(dian)(dian)阻(zu)值(zhi)和(he)A’、C’之(zhi)間的電(dian)(dian)阻(zu)值(zhi)）是(shi)(shi)否相同(tong)且是(shi)(shi)否與標稱阻(zu)值(zhi)相符。