我的逆变电源成功了

我做了个逆变器,
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TL494+3205,472电容4.3K电阻.EI33磁芯3+3+75匝.
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带150W灯炮电流10安,带40W电流4安多,空载电流200毫安.
有一个问题电压为什莫这末高,我换了一个EI40,5+5+70匝,带150W灯炮电压仍然1000多伏,灯线离开2毫米,也能打火,亮灯.搞不懂电压为什莫会这末高.