求助:逆电变压器的制做叁数{急}

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这是我的变压器   用的是494  有粗1.68和1.0  
要怎么绕线呢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/47/1162653583.gif');}" onmousewheel="return imgzoom(this);">