Reversing inductor's connection

Thread Starter

BlackMelon

Joined Mar 19, 2015
93
Hello,

I'm fixing a TIG welder. At first, even I max my current settings, the machine can't weld a metal. So I decide to reverse the "Lo" direction in the image file. I mean just swap the two terminals of it. This time, my power mosfets explode badly.

As far as I understand, the Lo doesn't couple on the same core with any coils, reversing it shouldn't give a different result. Am I correct? Why does reversing its direction give a catastrophic failure like this?

Thank you
Nattapong
 

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