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/45/1158298296.jpg?x-oss-process=image/watermark,g_center,image_YXJ0aWNsZS9wdWJsaWMvd2F0ZXJtYXJrLnBuZz94LW9zcy1wcm9jZXNzPWltYWdlL3Jlc2l6ZSxQXzQwCg,t_20');}" onmousewheel="return imgzoom(this);">请大家看看我的波形,给点建议和指导.
我试着做了个电源,双管正激,拟输出5V/80A,控制芯片3844,整流管,续流管为40A,200A的模块没敢用.现在用大约0.15欧负载,输出30A.现在的问题是输出波纹大的可以,居然高达5V,变压器原边波形(A)似乎还可以,就是回程有一个斜坡,如图中黄色圆圈中所示,副边(B)有衰减式震荡.我试着调节频率60K--200K,整流管的RC参数,变更电感的匝数,气隙等都没有什么效果,请大家帮助分析,指教.1158287365.pcbdoc500) {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/45/1158298296.jpg?x-oss-process=image/watermark,g_center,image_YXJ0aWNsZS9wdWJsaWMvd2F0ZXJtYXJrLnBuZz94LW9zcy1wcm9jZXNzPWltYWdlL3Jlc2l6ZSxQXzQwCg,t_20');}" onmousewheel="return imgzoom(this);">
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