Flyback Efficiency -- Looking for suggestions

Tim Wescott · 2016-03-21T22:09:03+00:00

I done messed up, and have managed to make a 50% efficient switching converter. I may have to just grin and use it (look! it's a space heater, too!), but if there's a quick solution I'm open to suggestions. It's a flyback, going from 3.7V (1-cell LiPo) to 200V. I'm using off-the- shelf transformers. It was looking a lot better in simulation than in real life, until I added what seems to be a realistic amount of capacitance to the secondary. So -- anyone see anything I can do with this? Suggestions welcome. Thanks in advance. Version 4 SHEET 1 4556 1460 WIRE 1808 -352 1696 -352 WIRE 2512 -352 1872 -352 WIRE 2560 -352 2512 -352 WIRE 2944 -352 2560 -352 WIRE 3168 -352 2944 -352 WIRE -144 -304 -240 -304 WIRE 48 -304 -64 -304 WIRE 176 -304 48 -304 WIRE 1520 -304 176 -304 WIRE 2144 -304 1520 -304 WIRE 2416 -304 2320 -304 WIRE 2560 -304 2560 -352 WIRE 2560 -304 2480 -304 WIRE 1520 -272 1520 -304 WIRE 1696 -272 1696 -352 WIRE 2144 -272 2144 -304 WIRE 2320 -272 2320 -304 WIRE 48 -256 48 -304 WIRE 2560 -256 2560 -304 WIRE 3168 -224 3168 -352 WIRE 1712 -192 1696 -192 WIRE 2336 -192 2320 -192 WIRE 48 -160 48 -192 WIRE 1392 -160 1328 -160 WIRE 1520 -160 1520 -192 WIRE 1520 -160 1456 -160 WIRE 1712 -160 1712 -192 WIRE 2016 -160 1952 -160 WIRE 2144 -160 2144 -192 WIRE 2144 -160 2080 -160 WIRE 2336 -160 2336 -192 WIRE 2560 -160 2560 -192 WIRE 1328 -64 1328 -160 WIRE 1728 -64 1328 -64 WIRE 1952 -64 1952 -160 WIRE 1952 -64 1728 -64 WIRE 2352 -64 1952 -64 WIRE 2512 -64 2352 -64 WIRE 192 -48 64 -48 WIRE 256 -48 192 -48 WIRE 416 -48 256 -48 WIRE 672 -48 416 -48 WIRE 896 -48 672 -48 WIRE 1136 -48 896 -48 WIRE 1872 -48 1136 -48 WIRE 2512 -48 2512 -64 WIRE 3168 -48 3168 -144 WIRE 416 -32 416 -48 WIRE 256 -16 256 -48 WIRE 1136 -16 1136 -48 WIRE 1520 -16 1520 -160 WIRE 1872 -16 1872 -48 WIRE 2144 -16 2144 -160 WIRE 672 0 672 -48 WIRE 2352 0 2352 -64 WIRE -240 32 -240 -304 WIRE 64 32 64 -48 WIRE 1040 32 1008 32 WIRE 1296 32 1232 32 WIRE 1776 32 1744 32 WIRE 2032 32 1968 32 WIRE 3120 32...

Mar 21, 2016 105 Replies

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Robert Baer 10 years ago

Yes, that was the main idea i had, but any scheme that can take that energy and "move" it either back to the input (supply source) or (better yet) "move" it to aid the output is commendable. Complaining about excessive snubber power waste just does not "fly" and does not get "back" for "efficiency". (((ooohhhh, could not resist.....)))

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Phil Hobbs 10 years ago

The Vlad memorial converter we were talking about a few months back is a good example of recycling the leakage inductance energy.

Cheers

Phil Hobbs

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John Larkin 10 years ago

If you start another pun thread, people will snub you.

John Larkin Highland Technology, Inc lunatic fringe electronics

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Robert Baer 10 years ago

Thanks; LOVE that come-back!

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John Larkin 10 years ago

Oh, go fly back to wherever you came from.

John Larkin Highland Technology, Inc lunatic fringe electronics

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legg 10 years ago

Not serius peebles. Ve haff serius fred heiare!

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