 Secondary: segmented/multi flanged bobbin
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Dr. Dark Current
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Registered Member #152
Joined: Sun Feb 12 2006, 03:36PM
Location: Czech Rep.
Posts: 3384
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RickR wrote ... I happened to be looking at: TI Design Doc, and at the top of page 5-4 it refers to possible melted windings resulting from placing them over the airgap in a flyback transformer. Huh??  Most if not All transformers I gutted from flyback SMPS's had an EE or EI core with a big gap right in the middle of the center core leg, and of course with all windings over it! And I've never seen any melted windings while unwinding them.
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RickR
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Registered Member #93
Joined: Thu Feb 09 2006, 04:11PM
Location: Houston, Texas
Posts: 64
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I looked at the article again, and noticed that their diagrams only show a single gap in the core. Could having two gaps (say for a TV flyback) mitigate the field intensity? Also, commercial flybacks may have a better design (as far as wire gauge and number of turns directly over the gap) than my DIY flybacks did. I basically just made the spools and wound until each section was nearly full. I didn't do any analysis at all, so I might just have had a crappy design.
Rick
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