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做高频机现遇到问题

IRF3205 4对,发热严重,开几分钟就烫手,变压器参数是0.8*6 4T*2 次级0.5 120T 电感1.2 1.5MH 可控硅TYN1225 接60W灯泡不是很亮,可以明显看到在闪,电压30多伏 3399761246441329.pdf 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/79/3399761246441379.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/79/3399761246441429.gif');}" onmousewheel="return imgzoom(this);"> 3399761246441450.pdf 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/79/3399761246441642.jpg?x-oss-process=image/watermark,g_center,image_YXJ0aWNsZS9wdWJsaWMvd2F0ZXJtYXJrLnBuZz94LW9zcy1wcm9jZXNzPWltYWdlL3Jlc2l6ZSxQXzQwCg,t_20');}" 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/79/3399761246441672.jpg?x-oss-process=image/watermark,g_center,image_YXJ0aWNsZS9wdWJsaWMvd2F0ZXJtYXJrLnBuZz94LW9zcy1wcm9jZXNzPWltYWdlL3Jlc2l6ZSxQXzQwCg,t_20');}" 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/79/3399761246441690.jpg?x-oss-process=image/watermark,g_center,image_YXJ0aWNsZS9wdWJsaWMvd2F0ZXJtYXJrLnBuZz94LW9zcy1wcm9jZXNzPWltYWdlL3Jlc2l6ZSxQXzQwCg,t_20');}" 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/79/3399761246441709.jpg?x-oss-process=image/watermark,g_center,image_YXJ0aWNsZS9wdWJsaWMvd2F0ZXJtYXJrLnBuZz94LW9zcy1wcm9jZXNzPWltYWdlL3Jlc2l6ZSxQXzQwCg,t_20');}" 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/79/3399761246441732.jpg?x-oss-process=image/watermark,g_center,image_YXJ0aWNsZS9wdWJsaWMvd2F0ZXJtYXJrLnBuZz94LW9zcy1wcm9jZXNzPWltYWdlL3Jlc2l6ZSxQXzQwCg,t_20');}" 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/79/3399761246441753.jpg?x-oss-process=image/watermark,g_center,image_YXJ0aWNsZS9wdWJsaWMvd2F0ZXJtYXJrLnBuZz94LW9zcy1wcm9jZXNzPWltYWdlL3Jlc2l6ZSxQXzQwCg,t_20');}" 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/79/3399761246441765.jpg?x-oss-process=image/watermark,g_center,image_YXJ0aWNsZS9wdWJsaWMvd2F0ZXJtYXJrLnBuZz94LW9zcy1wcm9jZXNzPWltYWdlL3Jlc2l6ZSxQXzQwCg,t_20');}" onmousewheel="return imgzoom(this);">
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bmwx1997
LV.7
2
2009-07-01 18:03
看你那驱动板和变压器飞线飞的,高频机没有那么干的,前级都没调好就先别接后机.
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tanming8
LV.6
3
2009-07-01 18:04
断开负载测量整机空载电流.如果电流大.2边管子发热均衡.则多半是变压器初级并头并错了或者变压器有短路现象
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tby2008
LV.9
4
2009-07-01 18:51
@tanming8
断开负载测量整机空载电流.如果电流大.2边管子发热均衡.则多半是变压器初级并头并错了或者变压器有短路现象
整个一个蜘蛛网络!
做高频机  最怕干扰
最好把变压器安装在离场管近的距离
驱动板也是

先把3525  10脚用2.2K接地 不接保护 试机
3525  5脚:3.3N  6脚:10K  7脚:100欧

祝你成功....
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liansc
LV.2
5
2009-07-02 08:38
@tby2008
整个一个蜘蛛网络!做高频机  最怕干扰最好把变压器安装在离场管近的距离驱动板也是先把3525  10脚用2.2K接地不接保护试机3525  5脚:3.3N  6脚:10K  7脚:100欧祝你成功....
老大,现在就是不知道前级怎么才算好!又没看不到波形,能给个详细的前级试机方法吗?3205各管脚电阻的不同用什么区别!!前级要达到怎样的效果才算好!!
谢谢了!!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/79/3399761246495103.gif');}" onmousewheel="return imgzoom(this);">
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dypp
LV.6
6
2009-07-02 09:22
@liansc
老大,现在就是不知道前级怎么才算好!又没看不到波形,能给个详细的前级试机方法吗?3205各管脚电阻的不同用什么区别!!前级要达到怎样的效果才算好!!谢谢了!![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/79/3399761246495103.gif');}"onmousewheel="returnimgzoom(this);">
你这图频率太高了吧,降频试试!你8脚的电容怎么用那么小?
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