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/32/1124683858.png?x-oss-process=image/watermark,g_center,image_YXJ0aWNsZS9wdWJsaWMvd2F0ZXJtYXJrLnBuZz94LW9zcy1wcm9jZXNzPWltYWdlL3Jlc2l6ZSxQXzQwCg,t_20');}" onmousewheel="return imgzoom(this);">
ch1黄色:U相对N电压,ch2蓝色:P对U相电压 P,N:直流母线电压的正负,M(红色)＝ch1+ch2＝310v＝VPN
想请问,ch1黄色,ch2蓝色为什么是这样的波形??????
逆变为6个igbt和6个续流d组合..
