Reversing inductor's connection

Discussion in 'The Projects Forum' started by BlackMelon, May 10, 2016.

  1. BlackMelon

    Thread Starter Member

    Mar 19, 2015

    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