Re: How's This Smps Patent?

On Sun, 04 May 2008 15:00:38 -0300, YD <ydtechHAT@xxxxxxxxxx> wrote:

Late at night, by candle light, "Bob Eld" <nsmontassoc@xxxxxxxxx>
penned this immortal opus:


"D from BC" <myrealaddress@xxxxxxxxx> wrote in message
news:a1hn14l19knmjn0jmcgrtngff63bp59a69@xxxxxxxxxx
It's patent number 6343021
Or see:
http://www.google.com/patents?id=wvQKAAAAEBAJ&dq=6343021
I found this patent a nice read. Not too 'patentese'.

I still consider myself a newbie at smps design but doesn't this look
like a 'neat' looking topology?

Claims:
Neat unity power factor.
Simpler circuitry
Substantially lower cost
Higher efficiency
Longer operation life
Truly integrated magnetics
Highest energy density
Isolated output
Steps or steps down
No RHP zero
No DC through magnetics (If I read right)
No large electrolytics on input or output
Minimizes EMI through use of sinusoidal waveforms
+ other features

Gee...it's like the dream supply.. :P

Driving the mosfet in the bridge looks like a pita.
I believe that's going to need a floating power supply.

I'm all dazzled by this design.
I want to pop this sucker into LTspice and take it for a test drive.

Comments on this design..??

Or any bad jokes...

Yup... I grew up with the Beatles..
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....and the cockroaches, ants and termites... It was a bug infested
house. :P


D from BC
British Columbia
Canada

It's a resonant converter These have been around for some time but his
transformer configuration seems unique. I'm not sure if this design brings
much to the table or not. I'd have to see a specific design example, look
into the transformer specifics, circulating currents, capacitor specs,
regulation, etc. and compare it with a more traditional design in price and
performance.

By way of comparison he has included a Cuk converter in the prior art
section. If you read their patents and papers, the Cuk is the best thing
since sex, yet they were never popular. The peculiar, hard to make magnetics
and other engineering nastys make them production nightmares. The patent
circuits have some of the same look to them. So, who knows?


Where's genome off to? ISTR he's pretty knowledgeable about these
thingies.

- YD.

Dunno...
I suspect there's a few retired designers spending their last days on
SED.

'...and the best switchmode supply topology considering all
compromises and current component technology is
a;liddufga'dodudijjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj... .'

(Collapses on keyboard due to heart attack) :P


D from BC
British Columbia
Canada
.

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