半橋電路MOS管漏源電壓尖峰大,如何解決?
我做的是雙向DC-DC變換器,變壓器頻率20K,2KW,MOS管關斷時尖峰電壓過大,當直流輸入電流為10A時,尖峰電壓有10V,MOS額定電壓為80V,加了RCD緩沖電路,對尖峰電壓基本沒影響,請問各位高手,如何解決啊?下午附上波形圖.
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@themaster
用數字電橋10K測得變壓器原邊漏感,為0.4微亨
開關管漏源電壓波形
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@themaster
開關管漏源電壓波形[圖片]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){returntrue;}else{window.open('http://u.dianyuan.com/bbs/u/80/3508111250424779.gif');}"onmousewheel="returnimgzoom(this);">[圖片]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){returntrue;}else{window.open('http://u.dianyuan.com/bbs/u/80/3508111250424792.gif');}"onmousewheel="returnimgzoom(this);">
主電路原理圖
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@themaster
主電路原理圖[圖片]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){returntrue;}else{window.open('http://u.dianyuan.com/bbs/u/80/3508111250425635.gif');}"onmousewheel="returnimgzoom(this);">
請各位高手給予解答啊!如何加緩沖電路可以吸收尖峰電壓,我在MOS管S2漏源極兩端并了RCD電路,電阻幾十歐姆,電容102或103的,可是對于尖峰電壓沒什么效果,請問加箝位二極管可以嗎?如何加?
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