一、貼片電感的作用是什么

1、阻流作用：線圈中的自感電動勢總是與線圈中的電流(liu)(liu)變化相對抗。主要可分為高頻(pin)阻(zu)流(liu)(liu)線圈及低(di)頻(pin)阻(zu)流(liu)(liu)線圈。

2、調諧與選頻作用：電(dian)感線圈與電(dian)容(rong)器并聯可(ke)組成LC調諧電(dian)路。即電(dian)路的(de)(de)固有振蕩頻(pin)率(lv)f0與非(fei)交流信號的(de)(de)頻(pin)率(lv)f相等(deng)，則回(hui)路的(de)(de)感抗(kang)與容(rong)抗(kang)也相等(deng)，于(yu)是電(dian)磁能量就在(zai)電(dian)感、電(dian)容(rong)之間(jian)回(hui)振蕩，這就是LC回(hui)路的(de)(de)諧振現(xian)象。

該圖片由注冊用戶"淺嘗不止—"提供，版權聲明反饋

貼片電(dian)(dian)(dian)感的用(yong)途：主要應(ying)用(yong)于消費(fei)類電(dian)(dian)(dian)子、醫療儀器(qi)(qi)(qi)(qi)、計算機產品和(he)外圍(wei)設(she)備、網(wang)絡xDSL濾波(bo)(bo)器(qi)(qi)(qi)(qi)、調(diao)制解(jie)調(diao)器(qi)(qi)(qi)(qi)、全球(qiu)定(ding)位系(xi)統(tong)、DC-DC變換器(qi)(qi)(qi)(qi)、升/降(jiang)變換器(qi)(qi)(qi)(qi)、放(fang)大器(qi)(qi)(qi)(qi)、視(shi)聽(ting)設(she)備、音頻設(she)備、噪聲(sheng)濾波(bo)(bo)器(qi)(qi)(qi)(qi)、電(dian)(dian)(dian)源、分(fen)析(xi)器(qi)(qi)(qi)(qi)、顯示器(qi)(qi)(qi)(qi)、開(kai)關(guan)(guan)穩壓器(qi)(qi)(qi)(qi)、SCR和(he)TRIAC控制電(dian)(dian)(dian)路、自(zi)動化系(xi)統(tong)、EMI/RFI扼制濾波(bo)(bo)器(qi)(qi)(qi)(qi)、揚聲(sheng)器(qi)(qi)(qi)(qi)伺服網(wang)絡、輸入濾波(bo)(bo)器(qi)(qi)(qi)(qi)、語音處理器(qi)(qi)(qi)(qi)、SMPS和(he)開(kai)關(guan)(guan)交流適配器(qi)(qi)(qi)(qi)、功放(fang)等。

二、貼片電感怎么測量好壞

1、首先我們需要在貼片電(dian)感(gan)上面(mian)做出標(biao)注。做標(biao)注的方法(fa)一共有兩種(zhong)，一種(zhong)是(shi)直(zhi)標(biao)法(fa)，另一種(zhong)是(shi)色(se)(se)標(biao)法(fa)。直(zhi)標(biao)法(fa)：在電(dian)感(gan)線圈的外殼上直(zhi)接用(yong)數(shu)字(zi)和(he)文字(zi)標(biao)出電(dian)感(gan)線圈的電(dian)感(gan)量(liang)，允(yun)許(xu)誤差及最大工作(zuo)電(dian)流等主要參(can)數(shu)；色(se)(se)標(biao)法(fa)：即用(yong)色(se)(se)環(huan)表示(shi)(shi)電(dian)感(gan)量(liang)，單位為mH，第一二位表示(shi)(shi)有效(xiao)數(shu)字(zi)，第三位表示(shi)(shi)倍率(lv)，第四位為誤差。

2、接(jie)著我們(men)需要一臺萬能(neng)表(biao)(biao)。將萬能(neng)表(biao)(biao)打到(dao)蜂鳴二級管檔，把表(biao)(biao)筆放(fang)在兩端(duan)，觀察萬用(yong)(yong)表(biao)(biao)的(de)讀(du)數(shu)。正常的(de)貼片(pian)電(dian)(dian)(dian)感(gan)的(de)讀(du)數(shu)應(ying)該為零(ling)，若萬用(yong)(yong)表(biao)(biao)的(de)讀(du)數(shu)偏(pian)大或無(wu)窮大則 表(biao)(biao)示貼片(pian)電(dian)(dian)(dian)感(gan)已經損壞。對于電(dian)(dian)(dian)感(gan)線(xian)圈(quan)匝數(shu)較多，線(xian)徑較細的(de)線(xian)圈(quan)數(shu)讀(du)數(shu)會達到(dao)幾(ji)十(shi)或者十(shi)幾(ji)百，通常情況下線(xian)圈(quan)的(de)直(zhi)流電(dian)(dian)(dian)阻只有幾(ji)歐姆。損壞還表(biao)(biao)現(xian)為發燙或電(dian)(dian)(dian)感(gan)磁(ci)環明顯損壞，若電(dian)(dian)(dian)感(gan)線(xian)圈(quan)不是很嚴重損壞，而又無(wu)法(fa)確(que)定時，可用(yong)(yong)電(dian)(dian)(dian)感(gan)表(biao)(biao)測(ce)量其(qi)電(dian)(dian)(dian)感(gan)量或用(yong)(yong)替(ti)換(huan)法(fa)來(lai)判斷。