【電(dian)位(wei)器接法】電(dian)位(wei)器的(de)工作(zuo)原理是什么 電(dian)位(wei)器怎(zen)么接
電位器怎么接
一般的電位器,中間的是(shi)動片(pian),所以(yi)測量(liang)電阻的話1。3腳是(shi)總(zong)電阻,動片(pian)動不動阻值(zhi)都不會(hui)變,接12,阻值(zhi)從順時針方向變大(動片(pian)動的話),接2,3就(jiu)是(shi)反的.6個(ge)腳叫雙聯(lian)電位器(qi),就(jiu)是(shi)2個(ge)單(dan)聯(lian)做在一起了,8腳的應該是(shi)帶了一個(ge)開關(guan),一般在汽(qi)車音響(xiang)上用的教多(duo)。
電位器的工作原理是什么
電(dian)(dian)位器(qi),是用于分壓的(de)可變電(dian)(dian)阻器(qi)。在裸露的(de)電(dian)(dian)阻體上(shang),緊(jin)壓著(zhu)一至兩個可移金屬觸點(dian)。觸點(dian)位置確定(ding)電(dian)(dian)阻體任一端與觸點(dian)間(jian)的(de)阻值(zhi)。按(an)材料分線繞、炭(tan)膜(mo)、實芯(xin)式電(dian)(dian)位器(qi);按(an)輸出與輸入電(dian)(dian)壓比與旋轉角度的(de)關(guan)系分直線式電(dian)(dian)位器(qi)(呈線性關(guan)系)、函數(shu)電(dian)(dian)位器(qi)(呈曲線關(guan)系)。主要參數(shu)為阻值(zhi)、容(rong)差、額定(ding)功率(lv)。廣泛用于電(dian)(dian)子設備,在音響和(he)接(jie)收機中作音量控制用。
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(shang)(shang)的(de)位(wei)(wei)置(zhi)(zhi),在(zai)動(dong)觸點(dian)與(yu)固(gu)定(ding)(ding)(ding)觸點(dian)之間便可(ke)(ke)得到一(yi)個(ge)(ge)與(yu)動(dong)觸點(dian)位(wei)(wei)置(zhi)(zhi)成一(yi)定(ding)(ding)(ding)關(guan)系的(de)電(dian)(dian)(dian)壓。它(ta)大多是(shi)用作分(fen)壓器(qi),這是(shi)電(dian)(dian)(dian)位(wei)(wei)器(qi)是(shi)一(yi)個(ge)(ge)四端元件。電(dian)(dian)(dian)位(wei)(wei)器(qi)基本上(shang)(shang)就是(shi)滑(hua)動(dong)變(bian)阻器(qi),有幾種樣式,一(yi)般用在(zai)音(yin)箱音(yin)量(liang)開關(guan)和激光頭功率大小(xiao)調節電(dian)(dian)(dian)位(wei)(wei)器(qi)是(shi)一(yi)種可(ke)(ke)調的(de)電(dian)(dian)(dian)子元件。它(ta)是(shi)由一(yi)個(ge)(ge)電(dian)(dian)(dian)阻體和一(yi)個(ge)(ge)轉動(dong)或(huo)滑(hua)動(dong)系統(tong)組(zu)成。當電(dian)(dian)(dian)阻體的(de)兩個(ge)(ge)固(gu)定(ding)(ding)(ding)觸電(dian)(dian)(dian)之間外加一(yi)個(ge)(ge)電(dian)(dian)(dian)壓時(shi),通過轉動(dong)或(huo)滑(hua)動(dong)系統(tong)改變(bian)觸點(dian)在(zai)電(dian)(dian)(dian)阻體上(shang)(shang)的(de)位(wei)(wei)置(zhi)(zhi),在(zai)動(dong)觸點(dian)與(yu)固(gu)定(ding)(ding)(ding)觸點(dian)之間便可(ke)(ke)得到一(yi)個(ge)(ge)與(yu)動(dong)觸點(dian)位(wei)(wei)置(zhi)(zhi)成一(yi)定(ding)(ding)(ding)關(guan)系的(de)電(dian)(dian)(dian)壓。
電位器型號規格
線繞電(dian)位(wei)器:WXX、WX1、WX3、WXW1—1、WXJ2、WXJ4、WX—010.030.050、WX1.5—1、WXDJ—1、WX5—11。實(shi)芯電(dian)位(wei)器;WS、WS5、WSW30。
合成(cheng)碳膜電位器: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理論精(jing)度。對(dui)于線(xian)繞(rao)電(dian)位(wei)器(qi)(qi)和線(xian)性電(dian)位(wei)器(qi)(qi)來(lai)說,分(fen)辨力(li)(li)是(shi)用動(dong)觸(chu)點在繞(rao)組(zu)上(shang)每移動(dong)一(yi)匝所引起的電(dian)阻變化量與總(zong)電(dian)阻的百分(fen)比表(biao)示。對(dui)于具有(you)函數特性的電(dian)位(wei)器(qi)(qi)來(lai)說,由(you)于繞(rao)組(zu)上(shang)每一(yi)匝的電(dian)阻不(bu)同,故分(fen)辨力(li)(li)是(shi)個變量。此時,電(dian)位(wei)器(qi)(qi)的分(fen)辨力(li)(li)一(yi)般是(shi)指函數特性曲線(xian)上(shang)斜率最大一(yi)段的平均分(fen)辨力(li)(li)。