我刚绕一个变压器,
测试波形如下(黄色为驱动信号Vgs;蓝色为漏源电压Vds)
空载: 占空比1%
![](http://u.dianyuan.com/bbs/u/64/748061208946582.gif)
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/64/748061208946582.gif');}" onmousewheel="return imgzoom(this);">
加载(输出电流1A) 占空比25.8%
![](http://u.dianyuan.com/bbs/u/64/748061208946642.gif)
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/64/748061208946642.gif');}" onmousewheel="return imgzoom(this);">
加载(输出电流2A) 占空比26.7%
![](http://u.dianyuan.com/bbs/u/64/748061208946689.gif)
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/64/748061208946689.gif');}" onmousewheel="return imgzoom(this);">
加载(输出电流3A) 占空比26.5%
![](http://u.dianyuan.com/bbs/u/64/748061208946732.gif)
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/64/748061208946732.gif');}" onmousewheel="return imgzoom(this);">
工作频率27KHZ,变压器初级:152匝;0.41mm单线次级:18匝 0.41mm八线,初级电感:2.91mH
请教为什么出现上述波形(满负荷是Vds峰值电压800V
请大家帮我指导下