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。dingshikongzhifangfazaishijiyunyongguochengzhong，suirankeyibaozhengnibianqishizhonggongzuozairongxingzhuangtai
，dansuizhejiaredejinxing，fuzaixiezhenpinlvsuizhishangsheng，zaibaochichaoqianshijianyidingdeqingkuangxia，chaoqianjiaobiranzengjia，congershishuchudianyaguogao
，zaochengnibianqibunenggongzuozaizuijiazhuangtai。zheshijiuxuyaojianxiaochaoqianshijian
，youshihouhuigeishijicaozuodailaibubian。

 

最zui後hou要yao為wei大da家jia介jie紹shao的de是shi感gan應ying加jia熱re電dian源yuan的de鎖suo相xiang環huan控kong製zhi調tiao頻pin方fang法fa。與yu定ding時shi調tiao頻pin法fa相xiang比bi，鎖suo相xiang環huan控kong製zhi調tiao頻pin技ji術shu能neng夠gou避bi免mian上shang述shu現xian象xiang的de發fa生sheng，能neng做zuo到dao觸chu發fa脈mai衝chong與yu超chao音yin頻pin電dian壓ya信xin號hao的de嚴yan格ge頻pin率lv同tong步bu，同tong時shi保bao持chi超chao前qian角jiao恒heng定ding

，因yin此ci近jin年nian來lai這zhe種zhong方fang法fa越yue發fa受shou到dao國guo內nei工gong程cheng師shi的de青qing睞lai。