额定功率为1000W,输入300V带载100W时,Q3的驱动波形异常,变压器啪嗒啪嗒的响,有波形图和原理图,请问是什么原因?谢谢

原理图

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额定功率为1000W,输入300V带载100W时,Q3的驱动波形异常,变压器啪嗒啪嗒的响,有波形图和原理图,请问是什么原因?谢谢

原理图
