微型減速電機的力矩簡述

2021-2-25 05:13

微型減速電機是一種常(chang)見的減(jian)速電(dian)機之(zhi)一。電(dian)機是一個制動設(she)備的，沒(mei)有電(dian)機，電(dian)動汽車就無法正常(chang)運(yun)行，所以說，在(zai)選擇(ze)(ze)微(wei)電(dian)機的時候，要選擇(ze)(ze)合(he)適(shi)并(bing)且質量好的器械(xie)，好選擇(ze)(ze)起動轉矩(ju)大(da)的微(wei)電(dian)機。

　　由于微電(dian)(dian)機(ji)的起動轉(zhuan)(zhuan)矩(ju)(ju)大，其轉(zhuan)(zhuan)矩(ju)(ju)特(te)(te)性(xing)曲線有(you)(you)明顯的區別。它可使臨界轉(zhuan)(zhuan)差率(lv)S0＞1，這(zhe)樣不(bu)僅使轉(zhuan)(zhuan)矩(ju)(ju)特(te)(te)性(xing)（機(ji)械特(te)(te)性(xing)）更接近于線性(xing)，而且具有(you)(you)較大的起動轉(zhuan)(zhuan)矩(ju)(ju)，因(yin)此，當定子(zi)一(yi)有(you)(you)控制電(dian)(dian)壓，轉(zhuan)(zhuan)子(zi)立(li)即轉(zhuan)(zhuan)動，即具有(you)(you)起動快、靈(ling)敏度(du)的特(te)(te)點。這(zhe)一(yi)對電(dian)(dian)磁力形成了作(zuo)用于電(dian)(dian)樞(shu)一(yi)個力矩(ju)(ju)，這(zhe)個力矩(ju)(ju)在旋轉(zhuan)(zhuan)電(dian)(dian)機(ji)里(li)稱為(wei)電(dian)(dian)磁轉(zhuan)(zhuan)矩(ju)(ju)，轉(zhuan)(zhuan)矩(ju)(ju)的方(fang)向(xiang)(xiang)是逆時(shi)針方(fang)向(xiang)(xiang)，企圖使電(dian)(dian)樞(shu)逆時(shi)針方(fang)向(xiang)(xiang)轉(zhuan)(zhuan)動。

　　微電(dian)(dian)(dian)(dian)機的(de)(de)起動轉(zhuan)矩一般(ban)采(cai)用硅鋼片(pian)疊壓(ya)而成，較電(dian)(dian)(dian)(dian)磁式直流(liu)電(dian)(dian)(dian)(dian)動機轉(zhuan)子的(de)(de)槽數(shu)少，錄放機中(zhong)使(shi)用的(de)(de)小功率電(dian)(dian)(dian)(dian)動機多數(shu)為3槽，較檔的(de)(de)為5槽或7槽，漆包(bao)線繞(rao)在轉(zhuan)子鐵心的(de)(de)兩槽之(zhi)間(jian)（三槽即(ji)有三個繞(rao)組(zu)），其各接頭分(fen)別焊在換向器(qi)的(de)(de)金屬片(pian)上(shang)。電(dian)(dian)(dian)(dian)刷(shua)是(shi)連(lian)接電(dian)(dian)(dian)(dian)源與(yu)轉(zhuan)子繞(rao)組(zu)的(de)(de)導電(dian)(dian)(dian)(dian)部件，具備導電(dian)(dian)(dian)(dian)與(yu)耐磨(mo)兩種性(xing)能，微電(dian)(dian)(dian)(dian)機的(de)(de)電(dian)(dian)(dian)(dian)刷(shua)使(shi)用單性(xing)金屬片(pian)或金屬石墨電(dian)(dian)(dian)(dian)刷(shua)、電(dian)(dian)(dian)(dian)化石墨電(dian)(dian)(dian)(dian)刷(shua)。

微電(dian)機導(dao)體受力的(de)方(fang)向(xiang)用左手(shou)定則確定，如果微電(dian)機能(neng)夠克(ke)服電(dian)樞(shu)上的(de)阻轉(zhuan)矩（例如由摩擦引起(qi)的(de)阻轉(zhuan)矩以及其它負載(zai)轉(zhuan)矩），電(dian)樞(shu)就能(neng)按逆時(shi)針方(fang)向(xiang)旋(xuan)轉(zhuan)起(qi)來。