電伴熱電纜的伴熱方式
2019.11.29
自控溫(wen)(wen)電(dian)(dian)伴(ban)熱(re)的(de)核心(xin)材(cai)料(liao)PTC半導電(dian)(dian)塑料(liao),其電(dian)(dian)阻值隨溫(wen)(wen)度(du)(du)的(de)升高而(er)相應(ying)的(de)增加(jia),但是(shi)當溫(wen)(wen)度(du)(du)上升到一定(ding)(ding)的(de)數(shu)值時(shi)(這個(ge)溫(wen)(wen)度(du)(du)值即為門檻溫(wen)(wen)度(du)(du),事實上它(ta)是(shi)可以根據需要進行調節大(da)小的(de)),電(dian)(dian)阻突然(ran)劇增,從而(er)阻電(dian)(dian)流(liu)停(ting)止加(jia)熱(re);當溫(wen)(wen)度(du)(du)低于門檻溫(wen)(wen)度(du)(du)時(shi),PTC材(cai)料(liao)的(de)電(dian)(dian)阻自動(dong)下降導通電(dian)(dian)流(liu),繼續加(jia)熱(re)。從而(er)使系統維持在一個(ge)穩定(ding)(ding)的(de)溫(wen)(wen)度(du)(du)值。 基本型自調控電(dian)(dian)伴(ban)熱(re)(伴(ban)熱(re)電(dian)(dian)纜)由PTC芯帶(dai)和絕緣層組成。