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我在做三相四桥臂逆变器的双闭环仿真时出现以下情况,请高手指点一下是什么原因.开环时很正常.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/40/1145523679.gif');}" onmousewheel="return imgzoom(this);">
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