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/76/3266621239976526.jpg?x-oss-process=image/watermark,g_center,image_YXJ0aWNsZS9wdWJsaWMvd2F0ZXJtYXJrLnBuZz94LW9zcy1wcm9jZXNzPWltYWdlL3Jlc2l6ZSxQXzQwCg,t_20');}" onmousewheel="return imgzoom(this);">关于高功率因数线路问题
发觉用普通2C4D逐流线路做高功率因数镇流器,有部分工程师把两个隔直电容有用153的.有的也用104的.我的就是用153的(T5 28W实际功率24W),但发觉在高压时,时间长了三极管温度很高,把隔直电容换成104温度就好了(功率会低,改电感把功率做一样).麻烦哪位有经验的朋友解释一下,就究竟大好还是小好呀?发现隔直小了,波峰比小了.
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