上面是主電路以及IGBT的S1:DS極波形與驅(qū)動的GS極波形,請部高手的方法解除振蕩的良方(該電路在未接入220直流電源時,S1測量GS極的波形是正常(見右邊圖),當(dāng)接入220直流電源后S1的DS與GS極都出現(xiàn)振蕩波形(見左邊圖),)
BUCK電路帶載后驅(qū)動GS與DS都出現(xiàn)振蕩有方法解決嗎,有波形圖
上面是主電路以及IGBT的S1:DS極波形與驅(qū)動的GS極波形,請部高手的方法解除振蕩的良方(該電路在未接入220直流電源時,S1測量GS極的波形是正常(見右邊圖),當(dāng)接入220直流電源后S1的DS與GS極都出現(xiàn)振蕩波形(見左邊圖),)
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散熱片未接地時的電位波形:
500) {this.resized=true; this.width=500; this.alt='這是一張縮略圖，點擊可放大。\n按住CTRL，滾動鼠標(biāo)滾輪可自由縮放';this.style.cursor='hand'}" onclick="if(!this.resized) {return true;} else {window.open('http://u.dianyuan.com/bbs/u/82/109541256978589.jpg');}" onmousewheel="return imgzoom(this);">
500) {this.resized=true; this.width=500; this.alt='這是一張縮略圖，點擊可放大。\n按住CTRL，滾動鼠標(biāo)滾輪可自由縮放';this.style.cursor='hand'}" onclick="if(!this.resized) {return true;} else {window.open('http://u.dianyuan.com/bbs/u/82/109541256978589.jpg');}" onmousewheel="return imgzoom(this);"> 0
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@zl8864
散熱片未接地時的電位波形:[圖片]500){this.resized=true;this.width=500;this.alt='這是一張縮略圖，點擊可放大。\n按住CTRL，滾動鼠標(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/82/109541256978589.jpg');}"onmousewheel="returnimgzoom(this);">
IGBT的GS與DS驅(qū)動波形都有振蕩波形:
500) {this.resized=true; this.width=500; this.alt='這是一張縮略圖，點擊可放大。\n按住CTRL，滾動鼠標(biāo)滾輪可自由縮放';this.style.cursor='hand'}" onclick="if(!this.resized) {return true;} else {window.open('http://u.dianyuan.com/bbs/u/82/109541256978653.jpg');}" onmousewheel="return imgzoom(this);">
500) {this.resized=true; this.width=500; this.alt='這是一張縮略圖，點擊可放大。\n按住CTRL，滾動鼠標(biāo)滾輪可自由縮放';this.style.cursor='hand'}" onclick="if(!this.resized) {return true;} else {window.open('http://u.dianyuan.com/bbs/u/82/109541256978653.jpg');}" onmousewheel="return imgzoom(this);"> 0
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@zl8864
IGBT的GS與DS驅(qū)動波形都有振蕩波形:[圖片]500){this.resized=true;this.width=500;this.alt='這是一張縮略圖，點擊可放大。\n按住CTRL，滾動鼠標(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/82/109541256978653.jpg');}"onmousewheel="returnimgzoom(this);">
IGBT的GS與TLP250驅(qū)動波形,但只有GS振蕩
500) {this.resized=true; this.width=500; this.alt='這是一張縮略圖，點擊可放大。\n按住CTRL，滾動鼠標(biāo)滾輪可自由縮放';this.style.cursor='hand'}" onclick="if(!this.resized) {return true;} else {window.open('http://u.dianyuan.com/bbs/u/82/109541256978783.jpg');}" onmousewheel="return imgzoom(this);">
500) {this.resized=true; this.width=500; this.alt='這是一張縮略圖，點擊可放大。\n按住CTRL，滾動鼠標(biāo)滾輪可自由縮放';this.style.cursor='hand'}" onclick="if(!this.resized) {return true;} else {window.open('http://u.dianyuan.com/bbs/u/82/109541256978783.jpg');}" onmousewheel="return imgzoom(this);"> 0
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@zl8864
IGBT的GS與TLP250驅(qū)動波形,但只有GS振蕩[圖片]500){this.resized=true;this.width=500;this.alt='這是一張縮略圖，點擊可放大。\n按住CTRL，滾動鼠標(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/82/109541256978783.jpg');}"onmousewheel="returnimgzoom(this);">
一般都是反饋環(huán)路出了問題
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