shouxianwomenxuyaolejiedeshi，gaopinganyingjiaredianyuanweishenmexuyaoshezhipinlvgenzongdianlu。zaiganyingjiareshebeidezhengchangyunxingguochengzhong
，fuzaidengxiaocanshuhecaoluguyouxiezhenpinlvyefashengbianhua。weilequebaojiarexitongzhongdenibianqishizhongnenggougongzuozaigonglvyinshujiejinhuodengyu1的準諧振或諧振狀態，以實現逆變器的零電流或零電壓開關

，其頻率跟蹤電路是必不可少的。

 

通常情況下
，想要實現對高頻感應加熱係統的頻率跟蹤，工程師通常會使用鎖相環電路來實現。最早開始廣泛使用的是CD4046鎖相環
，采用模擬電路控製，後來出現了單片機、DSP等(deng)數(shu)字(zi)化(hua)控(kong)製(zhi)，同(tong)時(shi)還(hai)出(chu)現(xian)了(le)數(shu)字(zi)鎖(suo)相(xiang)環(huan)。目(mu)前(qian)頻(pin)率(lv)自(zi)動(dong)跟(gen)蹤(zong)方(fang)法(fa)有(you)許(xu)多(duo)種(zhong)


，以(yi)下(xia)是(shi)兩(liang)種(zhong)比(bi)較(jiao)典(dian)型(xing)的(de)控(kong)製(zhi)方(fang)式(shi)
，分(fen)別(bie)是(shi)定(ding)時(shi)調(tiao)頻(pin)法(fa)和(he)鎖(suo)相(xiang)環(huan)控(kong)製(zhi)調(tiao)頻(pin)法(fa)。下(xia)麵(mian)我(wo)們(men)將(jiang)會(hui)就(jiu)這(zhe)兩(liang)種(zhong)控(kong)製(zhi)方(fang)式(shi)分(fen)別(bie)進(jin)行(xing)簡(jian)要(yao)介(jie)紹(shao)。

 

首(shou)先(xian)來(lai)看(kan)定(ding)時(shi)調(tiao)頻(pin)方(fang)法(fa)。所(suo)謂(wei)的(de)定(ding)時(shi)調(tiao)頻(pin)，指(zhi)的(de)是(shi)感(gan)應(ying)加(jia)熱(re)係(xi)統(tong)的(de)逆(ni)變(bian)器(qi)在(zai)整(zheng)個(ge)工(gong)作(zuo)過(guo)程(cheng)中(zhong)，保(bao)持(chi)負(fu)載(zai)中(zhong)電(dian)流(liu)超(chao)前(qian)電(dian)壓(ya)時(shi)問(wen)為(wei)恒(heng)值(zhi)。其(qi)基(ji)本(ben)的(de)設(she)計(ji)思(si)路(lu)
，是(shi)選(xuan)擇(ze)負(fu)載(zai)電(dian)壓(ya)和(he)電(dian)容(rong)電(dian)壓(ya)作(zuo)為(wei)控(kong)製(zhi)信(xin)號(hao)
，也(ye)稱(cheng)為(wei)電(dian)壓(ya)電(dian)流(liu)取(qu)交(jiao)角(jiao)方(fang)法(fa)。因(yin)為(wei)二(er)者(zhe)頻(pin)率(lv)相(xiang)同(tong)，相(xiang)位(wei)相(xiang)差(cha)2π。定ding時shi控kong製zhi方fang法fa在zai實shi際ji運yun用yong過guo程cheng中zhong，雖sui然ran可ke以yi保bao證zheng逆ni變bian器qi始shi終zhong工gong作zuo在zai容rong性xing狀zhuang態tai

，但dan隨sui著zhe加jia熱re的de進jin行xing
，負fu載zai諧xie振zhen頻pin率lv隨sui之zhi上shang升sheng，在zai保bao持chi超chao前qian時shi間jian一yi定ding的de情qing況kuang下xia，超chao前qian角jiao必bi然ran增zeng加jia，從cong而er使shi輸shu出chu電dian壓ya過guo高gao，造zao成cheng逆ni變bian器qi不bu能neng工gong作zuo在zai最zui佳jia狀zhuang態tai。這zhe時shi就jiu需xu要yao減jian小xiao超chao前qian時shi間jian，有you時shi候hou會hui給gei實shi際ji操cao作zuo帶dai來lai不bu便bian。

 

zuihouyaoweidajiajieshaodeshiganyingjiaredianyuandesuoxianghuankongzhitiaopinfangfa。yudingshitiaopinfaxiangbi
，suoxianghuankongzhitiaopinjishunenggoubimianshangshuxianxiangdefasheng，nengzuodaochufamaichongyuchaoyinpindianyaxinhaodeyangepinlvtongbu，tongshibaochichaoqianjiaohengding，yincijinnianlaizhezhongfangfayuefashoudaoguoneigongchengshideqinglai。