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/50/1171094980.gif');}" onmousewheel="return imgzoom(this);">
正半周给电池充电,负半周电源+电池电压给电容充电,再正半周电源电压加上电容电压给电池充电,(电容越大,脉冲越强,电容要好的,容易炸)