10A可调/175V-280V可调.
碰到些问题,现贴出主电路全桥部分电路图及相关试验波形,望大虾小虾一起讨论
,想想办法.
开关频率:67.5KHz(每个开关管固定开通时间约7US),死区时间0.4US,L4为谐振电
感,0.03MH,JP1,JP2可以视为不存在.
下图是主电路图:
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下图是带轻载时,主变压器原边电压波形:
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其它看起来都正常,图上标号1,2的地方,为什么会出现这样的一个弯,理论上应该是直上去的,现在却是出现了一个弯后再上去,而负向的波形却没有出现这情况,请教可能是由什么原因造成.
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