為什么空載紋波較小,帶負載就會出現(xiàn)4v左右的紋波,(振蕩信號)
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500) {this.resized=true; this.width=500; this.alt='這是一張縮略圖，點擊可放大。\n按住CTRL，滾動鼠標滾輪可自由縮放';this.style.cursor='hand'}" onclick="if(!this.resized) {return true;} else {window.open('http://u.dianyuan.com/bbs/u/22/1097680883.gif');}" onmousewheel="return imgzoom(this);"> 0
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