應(ying)急(ji)燈(deng)在家庭(ting)、酒店、學校等場所都是(shi)必須配(pei)備(bei)的燈(deng)具產品(pin)之一，原(yuan)(yuan)因是(shi)應(ying)急(ji)燈(deng)在安全疏(shu)散和通(tong)道照明中起到了(le)舉(ju)足(zu)輕(qing)重的作用，那(nei)么到底應(ying)急(ji)燈(deng)的工作原(yuan)(yuan)理是(shi)什(shen)么呢?下(xia)面(mian)就讓大(da)成(cheng)智慧(hui)應(ying)急(ji)燈(deng)廠家的小編為(wei)大(da)家詳細介紹，具體內容如下(xia)：

　　應急燈工作原理：

　　1、在(zai)供電(dian)正常時(shi)，J2(聚電(dian)器(qi))得電(dian)吸合(he)，其動觸點與“N/O(常開(kai)點)”接通，后(hou)備蓄電(dian)池正端與IC1的反(fan)相(xiang)端相(xiang)聯(lian)。IC1(LM308)和(he)D5、D6組成電(dian)壓(ya)(ya)比較器(qi)，參考(kao)電(dian)壓(ya)(ya)由D5、D6決(jue)定(ding)。這里用(yong)一個硅二(er)極管(D5)和(he)一個6.2V的穩壓(ya)(ya)二(er)極管(D6)組成6.9V的參考(kao)電(dian)壓(ya)(ya)，對充電(dian)壓(ya)(ya)電(dian)壓(ya)(ya)進(jin)行監控。

　　2、當(dang)IC1的(de)2腳(jiao)(jiao)輸(shu)入電(dian)(dian)(dian)(dian)壓(既蓄電(dian)(dian)(dian)(dian)池(chi)電(dian)(dian)(dian)(dian)壓)低于(yu)6.9V時，IC1的(de)6腳(jiao)(jiao)輸(shu)出(chu)高電(dian)(dian)(dian)(dian)平(ping)，T1導通(tong)，J1(聚(ju)電(dian)(dian)(dian)(dian)器)得電(dian)(dian)(dian)(dian)，其動觸點與“N/O(常開點)”接通(tong)，電(dian)(dian)(dian)(dian)源電(dian)(dian)(dian)(dian)壓通(tong)過R2對蓄電(dian)(dian)(dian)(dian)池(chi)充(chong)電(dian)(dian)(dian)(dian)，同時LED2點亮為充(chong)電(dian)(dian)(dian)(dian)指示(shi)。改變(bian)R2阻值可調整充(chong)電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)流。隨著充(chong)電(dian)(dian)(dian)(dian)時間增(zeng)加，IC1的(de)2腳(jiao)(jiao)電(dian)(dian)(dian)(dian)壓逐漸增(zeng)加，當(dang)電(dian)(dian)(dian)(dian)壓大于(yu)參考電(dian)(dian)(dian)(dian)壓6.9V時，IC1的(de)6腳(jiao)(jiao)輸(shu)出(chu)低電(dian)(dian)(dian)(dian)平(ping)，T1截止，J1(聚(ju)電(dian)(dian)(dian)(dian)器)失電(dian)(dian)(dian)(dian)，斷開充(chong)電(dian)(dian)(dian)(dian)回路(lu)，實現自動充(chong)電(dian)(dian)(dian)(dian)保護功能(neng)。

　　3、當停電(dian)(dian)時，J2(聚(ju)電(dian)(dian)器)失去電(dian)(dian)源，其動觸點(dian)與“N/C(常閉點(dian))”接通，蓄電(dian)(dian)池通過S1對應(ying)急燈(deng)電(dian)(dian)路(lu)供電(dian)(dian)，實現停電(dian)(dian)時自動切換功能。S1在這里用來手動切斷應(ying)急燈(deng)電(dian)(dian)路(lu)部分。

　　4、由IC2(NE555)、T2、T3、T4、X2等(deng)組(zu)成應(ying)急燈(deng)(deng)電(dian)路。IC2組(zu)成50Hz信(xin)(xin)號發生(sheng)器，由IC2的(de)(de)(de)3腳輸出50Hz信(xin)(xin)號，經(jing)T2反(fan)相、放大分別驅動由T3、T4、X2組(zu)成的(de)(de)(de)推挽電(dian)路，在X2的(de)(de)(de)高壓側感應(ying)出220V的(de)(de)(de)交流電(dian)，使(shi)(shi)日(ri)(ri)光燈(deng)(deng)管點亮。這里(li)的(de)(de)(de)X2可以直接使(shi)(shi)用次級(ji)為4.5伏、初級(ji)為220V的(de)(de)(de)成品電(dian)源變(bian)壓器，功率試日(ri)(ri)光燈(deng)(deng)管的(de)(de)(de)功率而(er)定。使(shi)(shi)用時(shi)，注意T3、T4應(ying)加散熱器。

　　以上內容就是小編給大家講解的應急燈定(ding)義及分類，今天內(nei)容(rong)(rong)就和大家分享到這里，如(ru)果想(xiang)要(yao)(yao)了解更多關于(yu)應(ying)(ying)急(ji)(ji)燈(deng)的相關知識，請關注大成智(zhi)慧(hui)應(ying)(ying)急(ji)(ji)燈(deng)廠家網(wang)站(//longdayuan.com.cn/)，我們會定(ding)期(qi)更新內(nei)容(rong)(rong);如(ru)果想(xiang)要(yao)(yao)咨詢(xun)應(ying)(ying)急(ji)(ji)燈(deng)價格(ge)，歡迎來(lai)電咨詢(xun)或者(zhe)是網(wang)站留言，我們會及時與你聯系，咨詢(xun)熱線：13342982185