STEORN DEMO LIVE & STREAM in Dublin, December 15th, 10 AM

[gravityblock]

lumen,

I just realized your meg design is similar to broli's "Constant flux DC motor/generator" thread, http://www.overunity.com/index.php?topic=8461.msg214777#msg214777

It's not the same, but I see some similarities between the two designs.  Instead of having it rotate, you replaced the rotation with every other coil being on/off and switching between them to simulate the rotation.  We may be on the right track here.  I like the concept.


GB

[mondrasek]

GB, k4, lumen, broli, etc...

Thanks guys!  I was concerned no one was going to give this a go anytime soon!  Learning all the new (to me) info on magnetic properties and the different available ferrites was frustrating my personal quest of how to (mentally) optimize the eOrbo demo design.  And the solid state transformers are way beyond my limited electrical/magnetic knowledge.  So I was hoping those with the expertise would start to play and post...  Most appreciated!

I had feared it would be a long frustrating wait until after the holidays to when Steorn gets back to us or releases Clanzer et. al from their NDAs.

I'm still hopefull TK will present more of his video experiments soon as well.

Exciting stuff.  Exciting times.

Thanks again.

M.

[interestedinou]

Hi Stephan,

I have been following the YouTube video #1 from Steorn but pulled my questions on that site as it seems that they give out very little technical information.  The video answers a lot of questions and I suspect your analysis is very correct.  There very obviously is BackEMF and little or no CounterEMF due to the toroidal coil construction. 

I had lots of problems with the design at first as I know that there is virtually no magnetic field external to a close coupled toroid coil and could not figure out how it could drive the rotor.  Finally realized it was simply a Adams motor (I assume everyone knows what a Adams motor is and how it works, if not Google it) with NO CEMF due to the toroid coil design.  It was also immediately apparent that you could recover most of the BEMF to a fast recharge the battery/supply with surprising results. 

IF you put a bridge rectifier across the coil network and drive the coils with a voltage low enough to not turn on the diodes during the pulse  (around 1.4V for a 4 diode bridge or higher if multiple diodes used in the legs of bridge) you then can recover the BEMF back to the battery.  You end up with resistive losses and very short BEMF pulses if diodes are fast enough and battery accepts a fast pulse recharge.  Thus you end up with a very efficient motor, Not powerful but super efficient in its own funny way.  Their estimate of COP around 3 for the power input vs. rotor mechanical output after all is accounted for is probably close and as seen in the Adams motor.  A standard pulse generator only has to make up for the actual resistive losses (10%?), charging losses (20-40%) air drag and bearing losses and you have a OU or super efficient device. A Super Cap should be much more efficient as a power supply than the battery used as there would be no recharging losses in the Cap. 

That they have not been able to utilize a solid state switching device is a puzzle considering the amount of money spend on this device.  There are many switches that have a very low ON resistance, are very fast devices for switching efficiency and fast recovery diodes that should work with no problem.  Anyway, I'm having fun working with this new twist.  It will take time to build one.  When you use NEO's with close coupled fields, the device must be robust to say the least. 

Happy holidays to all,
Ben

Hello,

I'm very interested in understanding one of the setups you mentioned on overunity.com about capturing flyback current. You stated the following. Could you please go into more detail and explain this setup to me? I would appreciate any help you can provide. I would like to build this circuit. I'm interested in powering an electromagnet from a battery and recapturing the flyback when the circuit opens.

Thank you.

Sincerely,
interestedinou

[interestedinou]

Show me a self running Joule Thief and I'll get excited but we are having fun arn't we?  Nice circuit, very efficient but can't keep the battery charged!  What a waste of bandwidth....

Ben

Would you mind explaining the circuit you mentioned that could harvest flyback current?

[Staffman]

Lumen good work. I thought I was the only one thinking of that.

I've been doing equations for the past three days to try to show output. I'm having trouble with the output coil equations. I know standard coil equations. But how can I calculate the amps in the output coil if the toroid is saturating and un-saturating, in say 1/1000th of a second. If the magnetic field (0.46T) generated by a coil (in response to the external magnet) around a 2000u permeable material is created by 0.02 amps of current, is that saying multiply the amps times the frequency(1000 times per sec) to get amps in one second? I do get confused at times. I hope this question doesn't look entirely stupid.