一、電位器怎么接線
電(dian)(dian)(dian)位(wei)(wei)器(qi)是一(yi)種電(dian)(dian)(dian)子元器(qi)件,一(yi)般具有三(san)(san)個引(yin)出(chu)端,由滑(hua)動軸(zhou)(滑(hua)片)、電(dian)(dian)(dian)阻(zu)體(ti)、外殼(ke)電(dian)(dian)(dian)阻(zu)體(ti)以及三(san)(san)個引(yin)出(chu)端等組成,旋轉滑(hua)動軸(zhou)阻(zu)值(zhi)會(hui)發生(sheng)變(bian)化并且按照(zhao)某種變(bian)化規律變(bian)化,同(tong)時在在輸(shu)出(chu)端獲得與(yu)位(wei)(wei)移量(liang)成一(yi)定關系的電(dian)(dian)(dian)阻(zu)值(zhi)或其他物理(li)量(liang)。如果按照(zhao)按阻(zu)值(zhi)輸(shu)出(chu)函數(shu)(shu)特性來(lai)區分電(dian)(dian)(dian)位(wei)(wei)器(qi)的話可分為直線式(shi)電(dian)(dian)(dian)位(wei)(wei)器(qi)、指(zhi)數(shu)(shu)式(shi)電(dian)(dian)(dian)位(wei)(wei)器(qi)和對數(shu)(shu)式(shi)電(dian)(dian)(dian)位(wei)(wei)器(qi)三(san)(san)種。
電(dian)位器(qi)的接線方法是:對于一(yi)般的電(dian)位器(qi),靠近中心的是滑(hua)片(pian),中心頭里面就是一(yi)根電(dian)阻(zu)(zu)(zu)絲(si),跟電(dian)阻(zu)(zu)(zu)絲(si)兩(liang)端兩(liang)個(ge)引腳(jiao)(jiao)直接連(lian)起來,這兩(liang)個(ge)引腳(jiao)(jiao)分別連(lian)接輸(shu)入信號(hao)(hao)和地(有些不接),比如(ru)一(yi)個(ge)引腳(jiao)(jiao)連(lian)輸(shu)入信號(hao)(hao),另一(yi)個(ge)管腳(jiao)(jiao)接地,此時這電(dian)阻(zu)(zu)(zu)絲(si)兩(liang)段(duan)上就有了(le)總的電(dian)阻(zu)(zu)(zu)值(zhi),如(ru)果(guo)用滑(hua)片(pian)在這根電(dian)阻(zu)(zu)(zu)絲(si)上來回滑(hua)動就可(ke)以獲得變化(hua)的阻(zu)(zu)(zu)值(zhi)了(le),但(dan)是如(ru)果(guo)輸(shu)入和輸(shu)出(chu)信號(hao)(hao)接反,那么滑(hua)片(pian)滑(hua)動方向與(yu)阻(zu)(zu)(zu)值(zhi)變化(hua)相反。
二、電位器的作用是什么
1、用作分壓器
電(dian)位(wei)器(qi)(qi)是(shi)一個連續可(ke)調(diao)的(de)(de)電(dian)阻器(qi)(qi),當調(diao)節(jie)電(dian)位(wei)器(qi)(qi)的(de)(de)轉(zhuan)柄或滑柄時,動(dong)觸點在電(dian)阻體上滑動(dong)。此(ci)時在電(dian)位(wei)器(qi)(qi)的(de)(de)輸出(chu)端可(ke)獲得與電(dian)位(wei)器(qi)(qi)外(wai)加電(dian)壓和可(ke)動(dong)臂轉(zhuan)角或行程(cheng)成一定關(guan)系(xi)的(de)(de)輸出(chu)電(dian)壓。
2、用作變阻器
電(dian)位器(qi)用(yong)作變阻(zu)器(qi)時,應把它接(jie)成兩(liang)端器(qi)件,這樣(yang)花電(dian)位器(qi)的行程范圍內,便可獲得(de)一個平滑連續(xu)變化的電(dian)阻(zu)值。
3、用作電流控制器
當電(dian)位器作為電(dian)流控(kong)制器使用時(shi),其中一(yi)個選(xuan)定的(de)電(dian)流輸出端必須是(shi)滑動觸點引出端。
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三、電位器三個引腳怎么接
兩邊的(de)引腳分(fen)別接輸入和地,中間(jian)引腳用來獲得電位(wei)。
電位器是具有三個引出(chu)端、阻值(zhi)可按某種變化(hua)規律調節的電阻元件。電位器通常(chang)由電阻體(ti)和可移動(dong)的電刷組(zu)成。
當電(dian)(dian)刷沿(yan)電(dian)(dian)阻體(ti)移動時,在輸出(chu)端即(ji)獲(huo)得(de)與位移量成一定(ding)關系的電(dian)(dian)阻值或(huo)電(dian)(dian)壓(ya)(ya)(ya)。由于它(ta)在電(dian)(dian)路中的作用是獲(huo)得(de)與輸入電(dian)(dian)壓(ya)(ya)(ya)(外加電(dian)(dian)壓(ya)(ya)(ya))成一定(ding)關系得(de)輸出(chu)電(dian)(dian)壓(ya)(ya)(ya),因(yin)此稱之為(wei)電(dian)(dian)位器。
四、電位器的測量方法是什么
1、標稱阻值的檢測
測(ce)(ce)量時,選用萬用表(biao)電(dian)阻檔的(de)適當(dang)量程,將兩(liang)表(biao)筆(bi)分別接在電(dian)位器(qi)兩(liang)個固定引腳焊片之間,先測(ce)(ce)量電(dian)位器(qi)的(de)總(zong)阻值(zhi)(zhi)是(shi)否與標稱阻值(zhi)(zhi)相同。若(ruo)測(ce)(ce)得(de)的(de)阻值(zhi)(zhi)為無窮大(da)或(huo)較(jiao)標稱阻值(zhi)(zhi)大(da),則說明該電(dian)位器(qi)已開路或(huo)變值(zhi)(zhi)損壞(huai)。
2、帶開關電位器的檢測
對于帶開(kai)關的(de)電(dian)位器(qi),除應按(an)以上方法(fa)檢測電(dian)位器(qi)的(de)標稱阻值及接觸情況(kuang)外,還應檢測其開(kai)關是(shi)否正常。先(xian)旋(xuan)轉(zhuan)電(dian)位器(qi)軸(zhou)柄,檢查開(kai)關是(shi)否靈活,接通、斷開(kai)時(shi)是(shi)否有清(qing)脆的(de)“喀噠(da)”聲。
3、雙連同軸電位器的檢測
用萬(wan)用表電(dian)(dian)(dian)阻檔的適當量程,分別(bie)測量雙連電(dian)(dian)(dian)位(wei)(wei)器(qi)上兩組電(dian)(dian)(dian)位(wei)(wei)器(qi)的電(dian)(dian)(dian)阻值(即A、C之(zhi)間的電(dian)(dian)(dian)阻值和A’、C’之(zhi)間的電(dian)(dian)(dian)阻值)是(shi)否相同且是(shi)否與標(biao)稱阻值相符。