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RE: EI transformer construction doesn't always mean air gap

Posted by slider on February 3, 2017 at 14:13:25:

Looks like there was some pruning done in this thread. I think if you are going for efficiency, there won't be an air gap, and the laminations supply a complete circuit. Of course, if the cores are designed to handle DC, there will need to be a gap to prevent saturation, same as with toroids that have a gap cut when used for choke applications.