熱(re)(re)敏(min)(min)電(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)(zu)(zu)出問(wen)題(ti)時(shi)(shi)如(ru)何檢查？大家都知道(dao)電(dian)(dian)(dian)(dian)器(qi)(qi)(qi)使用時(shi)(shi)間久了難免就(jiu)會出點小(xiao)(xiao)毛病小(xiao)(xiao)問(wen)題(ti)比如(ru)接線松了，接觸不良(liang)不能工作，電(dian)(dian)(dian)(dian)器(qi)(qi)(qi)外表好(hao)好(hao)的(de)(de)(de)沒(mei)什么問(wen)題(ti)就(jiu)是電(dian)(dian)(dian)(dian)器(qi)(qi)(qi)內(nei)部的(de)(de)(de)電(dian)(dian)(dian)(dian)子(zi)(zi)元件(jian)(jian)(jian)(jian)出問(wen)題(ti)，需(xu)要打(da)開看看內(nei)部。電(dian)(dian)(dian)(dian)子(zi)(zi)元件(jian)(jian)(jian)(jian)分(fen)(fen)類多(duo)，常(chang)見的(de)(de)(de)電(dian)(dian)(dian)(dian)子(zi)(zi)元件(jian)(jian)(jian)(jian)有電(dian)(dian)(dian)(dian)容器(qi)(qi)(qi)，電(dian)(dian)(dian)(dian)感器(qi)(qi)(qi)，電(dian)(dian)(dian)(dian)位器(qi)(qi)(qi)，電(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)(zu)(zu)器(qi)(qi)(qi)等(deng)，每(mei)種電(dian)(dian)(dian)(dian)子(zi)(zi)元件(jian)(jian)(jian)(jian)檢查方法不一(yi)樣(yang)。熱(re)(re)敏(min)(min)電(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)(zu)(zu)作為控溫(wen)(wen)(wen)測(ce)溫(wen)(wen)(wen)元件(jian)(jian)(jian)(jian)在微波爐(lu)、熱(re)(re)水壺、加熱(re)(re)器(qi)(qi)(qi)、暖風機(ji)等(deng)電(dian)(dian)(dian)(dian)器(qi)(qi)(qi)得到(dao)普(pu)遍(bian)應用。熱(re)(re)敏(min)(min)電(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)(zu)(zu)是一(yi)類具有非線性伏安特性的(de)(de)(de)對環境溫(wen)(wen)(wen)度(du)變(bian)化靈敏(min)(min)的(de)(de)(de)電(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)(zu)(zu)器(qi)(qi)(qi)，其阻(zu)(zu)(zu)(zu)(zu)(zu)值與溫(wen)(wen)(wen)度(du)有關，在相對較小(xiao)(xiao)的(de)(de)(de)溫(wen)(wen)(wen)度(du)范圍內(nei)熱(re)(re)敏(min)(min)電(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)(zu)(zu)的(de)(de)(de)電(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)(zu)(zu)值變(bian)化很大。熱(re)(re)敏(min)(min)電(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)(zu)(zu)按照不同的(de)(de)(de)溫(wen)(wen)(wen)度(du)系(xi)數分(fen)(fen)為正溫(wen)(wen)(wen)度(du)系(xi)數熱(re)(re)敏(min)(min)電(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)(zu)(zu)（PTC熱(re)(re)敏(min)(min)電(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)(zu)(zu)）和負溫(wen)(wen)(wen)度(du)系(xi)數熱(re)(re)敏(min)(min)電(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)(zu)(zu)（NTC熱(re)(re)敏(min)(min)電(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)(zu)(zu)）。熱(re)(re)敏(min)(min)電(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)(zu)(zu)的(de)(de)(de)響(xiang)應時(shi)(shi)間通常(chang)在幾秒鐘內(nei)。佛山正溫(wen)(wen)(wen)度(du)系(xi)數熱(re)(re)敏(min)(min)電(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)(zu)(zu)訂制(zhi)廠家

熱(re)(re)敏電(dian)(dian)阻(zu)(zu)的(de)(de)(de)(de)(de)基本特(te)性：BT=CT2+DT+E，上式中，C、D、E為(wei)常(chang)(chang)數(shu)(shu)(shu)。另(ling)外，因(yin)(yin)生產條件不同造成的(de)(de)(de)(de)(de)B值(zhi)的(de)(de)(de)(de)(de)波動會引起(qi)常(chang)(chang)數(shu)(shu)(shu)E發生變(bian)(bian)化，但常(chang)(chang)數(shu)(shu)(shu)C、D不變(bian)(bian)。因(yin)(yin)此(ci)，在探討B值(zhi)的(de)(de)(de)(de)(de)波動量時，只需考(kao)慮常(chang)(chang)數(shu)(shu)(shu)E即(ji)可(ke)。常(chang)(chang)數(shu)(shu)(shu)C、D、E的(de)(de)(de)(de)(de)計(ji)算，常(chang)(chang)數(shu)(shu)(shu)C、D、E可(ke)由(you)4點的(de)(de)(de)(de)(de)（溫(wen)度、電(dian)(dian)阻(zu)(zu)值(zhi)）數(shu)(shu)(shu)據(ju)（T0,R0).(T1,R1）.(T2,R2）and(T3,R3），通(tong)過式3～6計(ji)算。首先由(you)式樣3根據(ju)T0和T1,T2,T3的(de)(de)(de)(de)(de)電(dian)(dian)阻(zu)(zu)值(zhi)求出B1,B2,B3，然后代入以下各式樣。電(dian)(dian)阻(zu)(zu)值(zhi)計(ji)算例：試根據(ju)電(dian)(dian)阻(zu)(zu)－溫(wen)度特(te)性表(biao)，求25°C時的(de)(de)(de)(de)(de)電(dian)(dian)阻(zu)(zu)值(zhi)為(wei)5(kΩ），B值(zhi)偏差(cha)為(wei)50(K）的(de)(de)(de)(de)(de)熱(re)(re)敏電(dian)(dian)阻(zu)(zu)在10°C～30°C的(de)(de)(de)(de)(de)電(dian)(dian)阻(zu)(zu)值(zhi)。步(bu)驟（1）根據(ju)電(dian)(dian)阻(zu)(zu)－溫(wen)度特(te)性表(biao)，求常(chang)(chang)數(shu)(shu)(shu)C、D、E。To=25+273.15T1=10+273.15T2=20+273.15T3=30+273.15（2）代入BT=CT2+DT+E+50，求BT。（3）將數(shu)(shu)(shu)值(zhi)代入R=5exp{ (BT1/T-1/298.15）}，求R。*T:10+273.15～30+273.15。重慶電(dian)(dian)飯鍋熱(re)(re)敏電(dian)(dian)阻(zu)(zu)哪(na)家(jia)劃算熱(re)(re)敏電(dian)(dian)阻(zu)(zu)的(de)(de)(de)(de)(de)電(dian)(dian)路設(she)計(ji)需要(yao)考(kao)慮環境溫(wen)度和電(dian)(dian)路功耗等因(yin)(yin)素。

正溫(wen)(wen)度系(xi)數(shu)熱(re)敏(min)電(dian)(dian)(dian)阻(zu)：鈦(tai)酸鋇(bei)(bei)晶(jing)(jing)體(ti)屬于(yu)鈣鈦(tai)礦型結構(gou)，是一(yi)種鐵電(dian)(dian)(dian)材(cai)(cai)料(liao)，純鈦(tai)酸鋇(bei)(bei)是一(yi)種絕緣(yuan)材(cai)(cai)料(liao)．在鈦(tai)酸鋇(bei)(bei)材(cai)(cai)料(liao)中加入微量稀土元素，進(jin)行(xing)適當熱(re)處理(li)后，在居里溫(wen)(wen)度附近，電(dian)(dian)(dian)阻(zu)率(lv)陡(dou)增(zeng)幾(ji)個數(shu)量級(ji)，產生PTC效應(ying)，此效應(ying)與BaTiO3晶(jing)(jing)體(ti)的鐵電(dian)(dian)(dian)性及其在居里溫(wen)(wen)度附近材(cai)(cai)料(liao)的相變有關。鈦(tai)酸鋇(bei)(bei)半導瓷是一(yi)種多晶(jing)(jing)材(cai)(cai)料(liao)，晶(jing)(jing)粒(li)之間存在著晶(jing)(jing)粒(li)間界面。該半導瓷當達到(dao)某一(yi)特定溫(wen)(wen)度或電(dian)(dian)(dian)壓(ya)，晶(jing)(jing)體(ti)粒(li)界就(jiu)發(fa)生變化(hua)，從而電(dian)(dian)(dian)阻(zu)急(ji)劇(ju)變化(hua)。熱(re)敏(min)電(dian)(dian)(dian)阻(zu)的應(ying)用范圍非常普遍，包括電(dian)(dian)(dian)氣、電(dian)(dian)(dian)子、冶金、醫療(liao)、化(hua)工等領(ling)域(yu)。

實驗表(biao)明，在(zai)工作溫(wen)度(du)(du)范圍內，PTC熱(re)(re)敏(min)電(dian)(dian)(dian)阻(zu)的(de)電(dian)(dian)(dian)阻(zu)-溫(wen)度(du)(du)特性(xing)可(ke)近似用(yong)實驗公式表(biao)示：R(T)=R(T0)*exp(Bp(T-T0))。式中(zhong)R(T)、R(T0)表(biao)示溫(wen)度(du)(du)為T、T0時(shi)電(dian)(dian)(dian)阻(zu)值，Bp為該(gai)種材(cai)(cai)料(liao)的(de)材(cai)(cai)料(liao)常(chang)(chang)數。PTC效應起源于(yu)陶(tao)瓷(ci)的(de)粒界和粒界間析(xi)出(chu)相的(de)性(xing)質(zhi)，并隨(sui)雜質(zhi)種類、濃度(du)(du)、燒結條件(jian)等而(er)產生(sheng)(sheng)明顯變化。較近，進入實用(yong)化的(de)熱(re)(re)敏(min)電(dian)(dian)(dian)阻(zu)中(zhong)有(you)利用(yong)硅片的(de)硅溫(wen)度(du)(du)敏(min)感元件(jian)，這(zhe)是體(ti)型小且(qie)精度(du)(du)高的(de)PTC熱(re)(re)敏(min)電(dian)(dian)(dian)阻(zu)，由n型硅構(gou)成，因其(qi)中(zhong)的(de)雜質(zhi)產生(sheng)(sheng)的(de)電(dian)(dian)(dian)子散射隨(sui)溫(wen)度(du)(du)上升而(er)增加，從而(er)電(dian)(dian)(dian)阻(zu)增加。熱(re)(re)敏(min)電(dian)(dian)(dian)阻(zu)的(de)使用(yong)壽命(ming)通常(chang)(chang)與其(qi)材(cai)(cai)料(liao)和制造(zao)工藝有(you)關。

熱(re)(re)(re)敏(min)電(dian)(dian)(dian)(dian)阻的特點(dian)：熱(re)(re)(re)敏(min)電(dian)(dian)(dian)(dian)阻是開發早(zao)、種(zhong)類多(duo)、發展(zhan)較(jiao)成(cheng)熟的敏(min)感元器件(jian)。熱(re)(re)(re)敏(min)電(dian)(dian)(dian)(dian)阻由(you)半(ban)導體(ti)陶(tao)瓷材(cai)料組成(cheng)，熱(re)(re)(re)敏(min)電(dian)(dian)(dian)(dian)阻是用(yong)半(ban)導體(ti)材(cai)料，大多(duo)為負溫(wen)度系數，即阻值(zhi)隨溫(wen)度增加而降低(di)。熱(re)(re)(re)敏(min)電(dian)(dian)(dian)(dian)阻主要特點(dian)有靈敏(min)度較(jiao)高(gao);工(gong)作(zuo)(zuo)溫(wen)度范(fan)圍(wei)寬(kuan);體(ti)積小;使用(yong)方(fang)便;易加工(gong)成(cheng)復(fu)雜(za)的形(xing)狀，可大批量(liang)生產(chan);穩(wen)定性好、過載(zai)能(neng)力強。由(you)于半(ban)導體(ti)熱(re)(re)(re)敏(min)電(dian)(dian)(dian)(dian)阻有獨特的性能(neng)，所以在(zai)應(ying)用(yong)方(fang)面它不只可以作(zuo)(zuo)為測量(liang)元件(jian)，還可以作(zuo)(zuo)為控(kong)制元件(jian)和電(dian)(dian)(dian)(dian)路補償元件(jian)。熱(re)(re)(re)敏(min)電(dian)(dian)(dian)(dian)阻普遍(bian)用(yong)于家用(yong)電(dian)(dian)(dian)(dian)器、電(dian)(dian)(dian)(dian)力工(gong)業、通訊科學、宇航(hang)等各(ge)個領域，發展(zhan)前(qian)景(jing)極其廣闊(kuo)。熱(re)(re)(re)敏(min)電(dian)(dian)(dian)(dian)阻的抗(kang)干擾能(neng)力較(jiao)差，易受到周(zhou)圍(wei)環境的干擾。北(bei)京微(wei)波爐熱(re)(re)(re)敏(min)電(dian)(dian)(dian)(dian)阻生產(chan)商

熱(re)敏電(dian)(dian)阻的電(dian)(dian)阻值對(dui)環境(jing)溫度(du)的變化(hua)非(fei)常(chang)敏感。佛山正溫度(du)系數熱(re)敏電(dian)(dian)阻訂(ding)制廠家

如何使(shi)用(yong)NTC熱敏(min)(min)電(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)？NTC熱敏(min)(min)電(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)可用(yong)于交流(liu)(liu)線(xian)路或與橋式整(zheng)流(liu)(liu)器的(de)直流(liu)(liu)輸出一起(qi)使(shi)用(yong)，以(yi)抑制(zhi)啟動浪(lang)(lang)涌電(dian)(dian)(dian)(dian)流(liu)(liu)。當(dang)電(dian)(dian)(dian)(dian)源開關接通時(shi)，NTC熱敏(min)(min)電(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)處于冷態，電(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)值(zhi)較大，可以(yi)抑制(zhi)流(liu)(liu)過電(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)體浪(lang)(lang)涌脈沖電(dian)(dian)(dian)(dian)流(liu)(liu)，在浪(lang)(lang)涌電(dian)(dian)(dian)(dian)流(liu)(liu)和工作電(dian)(dian)(dian)(dian)流(liu)(liu)的(de)共同作用(yong)下，NTC熱敏(min)(min)電(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)器的(de)溫(wen)度會(hui)因(yin)負(fu)溫(wen)度系數而(er)升高(gao)，溫(wen)度會(hui)升高(gao)，電(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)會(hui)急(ji)劇(ju)下降。在穩態負(fu)載電(dian)(dian)(dian)(dian)流(liu)(liu)下，其電(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)值(zhi)會(hui)很(hen)(hen)小，對電(dian)(dian)(dian)(dian)流(liu)(liu)的(de)限制(zhi)作用(yong)很(hen)(hen)小，功耗很(hen)(hen)低(di)，不會(hui)影響整(zheng)個電(dian)(dian)(dian)(dian)源的(de)效率。因(yin)此(ci)，當(dang)具有恒(heng)定電(dian)(dian)(dian)(dian)子(zi)功率的(de)NTC熱敏(min)(min)電(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)用(yong)在同一電(dian)(dian)(dian)(dian)路電(dian)(dian)(dian)(dian)源中時(shi)，可以(yi)抑制(zhi)浪(lang)(lang)涌電(dian)(dian)(dian)(dian)流(liu)(liu)。佛山(shan)正(zheng)溫(wen)度系數熱敏(min)(min)電(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)訂制(zhi)廠家

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