一、貼片電感的作用是什么

1、阻流作用：線圈(quan)中(zhong)的(de)自感電(dian)動(dong)勢總是(shi)與(yu)線圈(quan)中(zhong)的(de)電(dian)流變化相對抗(kang)。主要(yao)可分為高頻阻(zu)流線圈(quan)及低頻阻(zu)流線圈(quan)。

2、調諧與選頻作用：電(dian)感線圈與電(dian)容器并(bing)聯(lian)可組(zu)成LC調諧電(dian)路。即(ji)電(dian)路的(de)固有(you)振蕩頻(pin)率(lv)f0與非交流信(xin)號的(de)頻(pin)率(lv)f相等(deng)，則回(hui)路的(de)感抗(kang)與容抗(kang)也相等(deng)，于(yu)是(shi)電(dian)磁能量就(jiu)在電(dian)感、電(dian)容之間回(hui)振蕩，這就(jiu)是(shi)LC回(hui)路的(de)諧振現象。

該圖片由注冊用戶"淺嘗不止—"提供，版權聲明反饋

貼片電(dian)感的用(yong)(yong)途：主要應用(yong)(yong)于消費類電(dian)子、醫療(liao)儀器(qi)(qi)(qi)、計(ji)算機產品(pin)和(he)外圍(wei)設備、網絡(luo)xDSL濾波(bo)器(qi)(qi)(qi)、調制解調器(qi)(qi)(qi)、全球定(ding)位系統、DC-DC變換器(qi)(qi)(qi)、升/降變換器(qi)(qi)(qi)、放(fang)大器(qi)(qi)(qi)、視聽設備、音頻(pin)設備、噪聲(sheng)濾波(bo)器(qi)(qi)(qi)、電(dian)源、分析(xi)器(qi)(qi)(qi)、顯示器(qi)(qi)(qi)、開關穩(wen)壓器(qi)(qi)(qi)、SCR和(he)TRIAC控制電(dian)路、自動化系統、EMI/RFI扼制濾波(bo)器(qi)(qi)(qi)、揚(yang)聲(sheng)器(qi)(qi)(qi)伺服網絡(luo)、輸(shu)入濾波(bo)器(qi)(qi)(qi)、語(yu)音處(chu)理器(qi)(qi)(qi)、SMPS和(he)開關交流(liu)適配器(qi)(qi)(qi)、功放(fang)等。

二、貼片電感怎么測量好壞

1、首先我(wo)們需要在(zai)(zai)貼片(pian)電(dian)感(gan)(gan)上面做出標(biao)注。做標(biao)注的方(fang)法一共有兩(liang)種，一種是直標(biao)法，另一種是色標(biao)法。直標(biao)法：在(zai)(zai)電(dian)感(gan)(gan)線(xian)圈的外殼上直接(jie)用數(shu)字和(he)文字標(biao)出電(dian)感(gan)(gan)線(xian)圈的電(dian)感(gan)(gan)量(liang)，允許誤差(cha)(cha)及最大工作電(dian)流等主要參(can)數(shu)；色標(biao)法：即用色環表(biao)示電(dian)感(gan)(gan)量(liang)，單位為(wei)(wei)mH，第一二位表(biao)示有效數(shu)字，第三位表(biao)示倍率，第四位為(wei)(wei)誤差(cha)(cha)。

2、接著我們需要一臺萬能表(biao)(biao)(biao)。將(jiang)萬能表(biao)(biao)(biao)打(da)到(dao)蜂(feng)鳴二級管檔，把(ba)表(biao)(biao)(biao)筆放在兩端(duan)，觀察(cha)萬用(yong)(yong)表(biao)(biao)(biao)的讀(du)數(shu)(shu)。正常的貼片電(dian)(dian)(dian)(dian)(dian)感(gan)的讀(du)數(shu)(shu)應(ying)該為零，若萬用(yong)(yong)表(biao)(biao)(biao)的讀(du)數(shu)(shu)偏(pian)大(da)或(huo)(huo)(huo)無(wu)窮(qiong)大(da)則 表(biao)(biao)(biao)示(shi)貼片電(dian)(dian)(dian)(dian)(dian)感(gan)已經(jing)損(sun)(sun)壞。對于(yu)電(dian)(dian)(dian)(dian)(dian)感(gan)線圈(quan)匝數(shu)(shu)較多，線徑較細(xi)的線圈(quan)數(shu)(shu)讀(du)數(shu)(shu)會達到(dao)幾十或(huo)(huo)(huo)者(zhe)十幾百，通常情況下線圈(quan)的直流電(dian)(dian)(dian)(dian)(dian)阻只有幾歐姆。損(sun)(sun)壞還表(biao)(biao)(biao)現為發燙(tang)或(huo)(huo)(huo)電(dian)(dian)(dian)(dian)(dian)感(gan)磁環明顯損(sun)(sun)壞，若電(dian)(dian)(dian)(dian)(dian)感(gan)線圈(quan)不是(shi)很嚴(yan)重損(sun)(sun)壞，而又無(wu)法(fa)(fa)確定(ding)時，可用(yong)(yong)電(dian)(dian)(dian)(dian)(dian)感(gan)表(biao)(biao)(biao)測量(liang)其(qi)電(dian)(dian)(dian)(dian)(dian)感(gan)量(liang)或(huo)(huo)(huo)用(yong)(yong)替換(huan)法(fa)(fa)來判斷。