移相全橋的MOSFET管漏極電流Id有4KA!
用spice仿真了一下,輸入是60V的直流,開關頻率是120KHZ,這個漏極電流也太大了吧,哪里出了問題?
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@abing
仿真的?把圖與波形貼上看看
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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/65/2480111211948581.jpg');}" onmousewheel="return imgzoom(this);">
開關122.5KHZ,占空比0.48,死區時間0.02T
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@linglee
[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/65/2480111211948559.jpg');}"onmousewheel="returnimgzoom(this);">[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/65/2480111211948581.jpg');}"onmousewheel="returnimgzoom(this);">開關122.5KHZ,占空比0.48,死區時間0.02T
把各個驅動的波形分別拿來看看,移相的時序對不對,怎么開通時間這么短,是不是直通了?
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@cafetea
把各個驅動的波形分別拿來看看,移相的時序對不對,怎么開通時間這么短,是不是直通了?
四個開關管的順序:
1 3
2 4
圖一是1、2的驅動脈沖
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圖二是3、4的驅動脈沖
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/65/2480111211961085.jpg');}" onmousewheel="return imgzoom(this);">
圖三是1、2、3、4的驅動脈沖
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/65/2480111211961120.jpg');}" onmousewheel="return imgzoom(this);">
對應的漏極電流波形,高達3KA,怎么辦?
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/65/2480111211961169.jpg');}" onmousewheel="return imgzoom(this);">
1 3
2 4
圖一是1、2的驅動脈沖
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/65/2480111211960985.jpg');}" onmousewheel="return imgzoom(this);">
圖二是3、4的驅動脈沖
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/65/2480111211961085.jpg');}" onmousewheel="return imgzoom(this);">
圖三是1、2、3、4的驅動脈沖
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/65/2480111211961120.jpg');}" onmousewheel="return imgzoom(this);">
對應的漏極電流波形,高達3KA,怎么辦?
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/65/2480111211961169.jpg');}" onmousewheel="return imgzoom(this);"> 0
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@abing
你后面的電路沒畫出來,抓圖也要一致啊,要不怎么清楚你測的是那點的波形?
完整電路:
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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/65/2480111211973988.jpg');}" onmousewheel="return imgzoom(this);"> 0
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