------ 我的逆变器老烧管子------

我做了一个200W的 DC12V -- DC600V  的逆变电源,磁芯中心是圆形的大约13MM宽和高大约30MM初级2*2圈次级50圈,用了一对IRF2807的管子!

空载电流0.22A  当我窜两个60W的灯泡时管子发热严重一会就炸了频率大约为90kHZ ,波形不太好但是找不到原因,请大家帮忙诊断一下,谢谢了!

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下面是空载波形!
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