fspower:
滞后臂是零电流关断,但超前臂必定是在电流峰值上关断,关断后电流才会下降的啊,只要谐振电感,电容足够大,电流就突变不了,损耗就不会大.[图片]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){returntrue;}else{window.open('http://u.dianyuan.com/bbs/u/60/49631197335198.jpg');}"onmousewheel="returnimgzoom(this);">