 Transformer + Multiplier = Resonance Effects
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jpsmith123
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Wed Jan 18 2012, 04:50PM
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Registered Member #1321
Joined: Sat Feb 16 2008, 03:22AM
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Posts: 843
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Well before I design a drive circuit and wind a (permanent) primary, I decided to do some low power testing with the transformer (using various secondary coils) hooked up to the multiplier, to see how they behave together; and as expected, I'm seeing some resonance effects.
As expected, the layer wound coil is somewhat worse than the segmented coils, even though the latter have more turns.
Hopefully after I get some more data I can refine my spice model a little bit and see what's what and who's who.
Probably the silicone potting is contributing a little bit to the capacitive loading I'm seeing, so I can see another reason why Glassman would opt for air insulation.
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radiotech
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Registered Member #2463
Joined: Wed Nov 11 2009, 03:49AM
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The tuning of the transformers to either the 3rd or 5th harmonic of the driving
pulse is what was done over several generation of television flybacks that used multipliers
and various winding strategies. The work is detailed in papers that you can find.
The object was regulation and overall efficiency.
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