传导与辐射超标整改方案
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@liweibing
把相关的资料传上来.没看到资料是没法出对策的.不过周师傅分析得也有道理.这属于次级变压器与肖特基二极管的等效电容的寄生振荡产生的共模干扰由次级的输出线辐射出去了.我们只是交流,不会收费的.另外,我现在转行做电源销售了.不过对于大家的问题我还是会一一回答的
最近有一个产品,辐射在30M左右的时候超规格了5db,原理图如下,变压器为一般的三明治绕法,加两层屏蔽,不知到有什么可以改进的方法
2473941226282191.pdf
2473941226282191.pdf
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@liweibing
把我说的那些资料发上来吧,要不能没法分析干扰源,也就没法出对策了
layout 图面
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传导测试
2473941226323805.pdf
辐射测试
2473941226367711.pdf
变压器
2473941226325326.doc
VDS和肖特基波形
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500) {this.resized=true; this.width=500; this.alt='这是一张缩略图,点击可放大。\n按住CTRL,滚动鼠标滚轮可自由缩放';this.style.cursor='hand'}" onclick="if(!this.resized) {return true;} else {window.open('http://u.dianyuan.com/bbs/u/71/2473941226365828.gif');}" onmousewheel="return imgzoom(this);">
500) {this.resized=true; this.width=500; this.alt='这是一张缩略图,点击可放大。\n按住CTRL,滚动鼠标滚轮可自由缩放';this.style.cursor='hand'}" onclick="if(!this.resized) {return true;} else {window.open('http://u.dianyuan.com/bbs/u/71/2473941226323130.gif');}" onmousewheel="return imgzoom(this);">
500) {this.resized=true; this.width=500; this.alt='这是一张缩略图,点击可放大。\n按住CTRL,滚动鼠标滚轮可自由缩放';this.style.cursor='hand'}" onclick="if(!this.resized) {return true;} else {window.open('http://u.dianyuan.com/bbs/u/71/2473941226323826.png');}" onmousewheel="return imgzoom(this);">
传导测试
2473941226323805.pdf
辐射测试
2473941226367711.pdf
变压器
2473941226325326.doc
VDS和肖特基波形
500) {this.resized=true; this.width=500; this.alt='这是一张缩略图,点击可放大。\n按住CTRL,滚动鼠标滚轮可自由缩放';this.style.cursor='hand'}" onclick="if(!this.resized) {return true;} else {window.open('http://u.dianyuan.com/bbs/u/71/2473941226365812.gif');}" onmousewheel="return imgzoom(this);">
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@hlp330
layout图面[图片]500){this.resized=true;this.width=500;this.alt='这是一张缩略图,点击可放大。\n按住CTRL,滚动鼠标滚轮可自由缩放';this.style.cursor='hand'}"onclick="if(!this.resized){returntrue;}else{window.open('http://u.dianyuan.com/bbs/u/71/2473941226323130.gif');}"onmousewheel="returnimgzoom(this);">[图片]500){this.resized=true;this.width=500;this.alt='这是一张缩略图,点击可放大。\n按住CTRL,滚动鼠标滚轮可自由缩放';this.style.cursor='hand'}"onclick="if(!this.resized){returntrue;}else{window.open('http://u.dianyuan.com/bbs/u/71/2473941226323826.png');}"onmousewheel="returnimgzoom(this);">传导测试2473941226323805.pdf辐射测试2473941226367711.pdf变压器2473941226325326.docVDS和肖特基波形[图片]500){this.resized=true;this.width=500;this.alt='这是一张缩略图,点击可放大。\n按住CTRL,滚动鼠标滚轮可自由缩放';this.style.cursor='hand'}"onclick="if(!this.resized){returntrue;}else{window.open('http://u.dianyuan.com/bbs/u/71/2473941226365812.gif');}"onmousewheel="returnimgzoom(this);">[图片]500){this.resized=true;this.width=500;this.alt='这是一张缩略图,点击可放大。\n按住CTRL,滚动鼠标滚轮可自由缩放';this.style.cursor='hand'}"onclick="if(!this.resized){returntrue;}else{window.open('http://u.dianyuan.com/bbs/u/71/2473941226365821.gif');}"onmousewheel="returnimgzoom(this);">[图片]500){this.resized=true;this.width=500;this.alt='这是一张缩略图,点击可放大。\n按住CTRL,滚动鼠标滚轮可自由缩放';this.style.cursor='hand'}"onclick="if(!this.resized){returntrue;}else{window.open('http://u.dianyuan.com/bbs/u/71/2473941226365828.gif');}"onmousewheel="returnimgzoom(this);">
咋没消息了呢?
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