Keppe is headed to the big show, First exotic product to market

[markdansie]

The Keppe Challenge is on Tinman VS Keppe lol
http://revolution-green.com/2013/09/10/keppe-fan-challenge/


The Keppe fan is joke
Mark

[ramset]

Mark
Good of you to pick up that challenge,Have you gotten all the Tech Data on the blades
and MFG info on their fan?

Should not be to hard to get from Sterling ,I believe he does admit to a "piece" of the action here?

Thanks again
Chet

[TinselKoala]

Well, all I can say at this point is that Keppe has been around a long time with his pulse motors. The demo in the video is about as crude as you can get, and is even using the reed switch which will not survive long.

I can confirm that the only comparable fan we have in the house, a "box fan", draws about 100 W when it is in the high-speed mode. We have a few of the classic Hunter high-quality ceiling fans about the place, let me crawl up into the attic and get a current draw measurement on one of them. I'll report back later on.

The power (watts) dissipation of a fan blade goes as some power (exponent) of the RPM, like the cube or fourth power or something like that, IIRC, so you have to be very careful about your RPM measurements because a small change in RPM can mean a big change in power dissipation for the same fan blade.

[Farmhand]

Yes it is fairly Easy to beat the efficiency of a purchased regular fan, my own pulse motor does it no problem, and mine is almost completely hand made.
Tinsel is right too with fan blades it takes a lot more energy to push a blade from say 1500 rpm to 1600 rpm than it does to push it from 1400 rpm to 1500 rpm.

The same blade should be used and the fan I compare against has a smaller blade and pushes less air at the same rpm than the one I cut down for my motor, due to the design of my motor it can only compare small blades. At some loads it can be extremely efficient and run in pulse mode with flyback returned to the lagging phase of the resonant charging coil to loop the released inductive energy or to recharge another battery.

I only got so far to build a first of it's kind prototype, then got quite ill, when I get time I will be building a much more exact and practical build of the same two phases from one design. The idea is to run it in the ideal rpm range for good efficiency but use more coils for the next build and designed for a certain frequency range that I want. The next one I want to run from rectified 240v from the wall if possible.

I ended up with a large cap bank dumped by sensed voltage to a picaxe chip through a mosfet to a battery which can give multi amp pulsations which is nothing new.

Even though I am returning the flyback to the input without a charge battery, it goes back to a capacitor not the battery and is fed to the lagging coil it is designed to still produce a higher than supply discharge potential, the flyback is not tied to the supply rail.

Wave form with the return in use. Blue is the mosfet drain yellow is the capacitor
the charging coil charges and the mosfet switches the energy from through the coil.
http://www.youtube.com/watch?v=mrlL099cz2Q

Demo with three loads at efficent speed.
http://www.youtube.com/watch?v=BanKGAVa9SQ

The Keppe pulse motors do not impress me all that much either.

Cheers
..

[ramset]

Here is the link to ""The worlds first Exotic product to market""

http://pesn.com/2013/09/06/9602368_4x-efficient_Keppe-Motor_ceiling-fan_featured_at_China-Sourcing-Fair/

thx
Chet