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如果將輸入電壓改為350V-400V;電流諧振的波形和負(fù)載調(diào)整率都沒(méi)有問(wèn)題![圖片]500){this.resized=true;this.width=500;this.alt='這是一張縮略圖，點(diǎn)擊可放大。\n按住CTRL，滾動(dòng)鼠標(biāo)滾輪可自由縮放';this.style.cursor='hand'}"onclick="if(!this.resized){returntrue;}else{window.open('http://u.dianyuan.com/bbs/u/71/72821227513843.jpg');}"onmousewheel="returnimgzoom(this);">

若保證電流為正弦波;則負(fù)載調(diào)整率很差;若保證負(fù)載調(diào)整率(改變Rmin)則電流波形就會(huì)變成我上面所傳的波形;兩者很難兼顧.請(qǐng)問(wèn)為什么?謝謝!

變壓器初級(jí)電感加大后;空載時(shí)的磁勵(lì)電流小了1A;但是諧振電容不能用66nF;應(yīng)減小;否則負(fù)載調(diào)整率很差!上傳改后的空載和滿載波形![圖片]500){this.resized=true;this.width=500;this.alt='這是一張縮略圖，點(diǎn)擊可放大。\n按住CTRL，滾動(dòng)鼠標(biāo)滾輪可自由縮放';this.style.cursor='hand'}"onclick="if(!this.resized){returntrue;}else{window.open('http://u.dianyuan.com/bbs/u/71/72821227239764.jpg');}"onmousewheel="returnimgzoom(this);">[圖片]500){this.resized=true;this.width=500;this.alt='這是一張縮略圖，點(diǎn)擊可放大。\n按住CTRL，滾動(dòng)鼠標(biāo)滾輪可自由縮放';this.style.cursor='hand'}"onclick="if(!this.resized){returntrue;}else{window.open('http://u.dianyuan.com/bbs/u/71/72821227239804.jpg');}"onmousewheel="returnimgzoom(this);">

直流輸入電壓為300V;輸出為85V/4A.所繞的變壓器參數(shù)為:LP=160uH(Lr=10uH);LS=33uH;外接諧振電感電感為22-25uH;諧振電容計(jì)算為100nF,實(shí)際上的為66nF;(因?yàn)橹C振電容大會(huì)導(dǎo)致負(fù)載調(diào)整率很差);請(qǐng)問(wèn)是否要加大LP電感;謝謝!

上傳空載很滿載的波形![圖片]500){this.resized=true;this.width=500;this.alt='這是一張縮略圖，點(diǎn)擊可放大。\n按住CTRL，滾動(dòng)鼠標(biāo)滾輪可自由縮放';this.style.cursor='hand'}"onclick="if(!this.resized){returntrue;}else{window.open('http://u.dianyuan.com/bbs/u/71/72821227230199.jpg');}"onmousewheel="returnimgzoom(this);">[圖片]500){this.resized=true;this.width=500;this.alt='這是一張縮略圖，點(diǎn)擊可放大。\n按住CTRL，滾動(dòng)鼠標(biāo)滾輪可自由縮放';this.style.cursor='hand'}"onclick="if(!this.resized){returntrue;}else{window.open('http://u.dianyuan.com/bbs/u/71/72821227230239.jpg');}"onmousewheel="returnimgzoom(this);">

25uH應(yīng)該不小;我是根據(jù)飛兆提供的公式計(jì)算出來(lái)的!謝謝!

應(yīng)該不是電流大的問(wèn)題;首先變壓器不燙;而且空載的時(shí)候諧振電感還是會(huì)發(fā)燙;我是用磁環(huán)繞的;電感是25uH.