F.B.D.I.S.S.M - Flux.Boosted.Dual.Induction.Split.Spiral.Motor.

[supersam]

@honk,

i certainly didn't mean to derail you with my pessimistic view.  i only wanted to steer you in the direction of the micro, with your vision.  it just seems to me it would be alot easier to make a flux boosted dual induction split spiral motor that could produce milliwatts of electricity than one that had to produce megawatts.  you can take that however you want and don't let me hinder you from your dream, but the sooner you see the limitations of a magnetically driven system, then the sooner in my opinion you will start to see the benifits of the reduction of size. i would love to just have one of your units that could power a single light.  or maybe my refridgerator even if it is a seperate unit.  small though they may be.

lol
sam

[Honk]

It just seems to me it would be alot easier to make a flux boosted dual induction split spiral motor that could produce milliwatts of electricity than one that had to produce megawatts.

Sorry Supersam.
I'm not interested in a milliwatt unit. If I'm going to build this I will aim for kilowatts output, but I'll be happy if I hit 500W.
You see, if the output is to low you cannot create a self runner due to all frictional losses of the gear box, generator and other inefficiencies.
If I hit at least 500W output I can easily measure the outcome and perhaps even prove it by a self runner.

But if this device is working just as good as my calculations, I expect it to deliver approx 4500W at 500 RPM, perhaps more.
The average stall torque from the new 60cm motor is calculated to 135ft-lbs. The torque will decrease at speed and some is eaten by the sticky spot.
At 500 RPM I'll be happy if I can harvest half of the stall torque at 67.5ft-lbs.

And the output formula is simple.
Hp at 500 RPM = (67,5 * 2 * 3,14 * 500) / 33000 = 6,42 Hp
Hp in Watts = 6,42 *  746 = 4789 watt

If successful, whether I hit 500W or 4500W, then it's easy to upscale the next unit to meet the requirements of the average household.
But that belongs to the future. Right now I'm focused on finishing the present motor.

[Honk]

Another small but important update:

The heat annealed Mumetal samples will arrive early next week.
I can then test if this new core material really improves the magnetic properties and attraction force.

I have also increased the efficiency of the final Solenoid simply by swapping the round copper wire into square wire.
It allows for a lot better fillrate thus having less copper losses per turn ratio. Calculations show a 17% improvement.
This translates into a solenoid running at 600W and using square wire, will have the same strength as 720W input when using round wire.
But I haven't changed the small test solenoid into square wire. I will only do this on the final solenoids going into the large motor.
Elseway I couldn't compare differences towards the earlier solenoid test results.

I some other very good news to tell you guys.
Yesterday I applied my torque and Hp formula on Sprains small prototype wankel, aka Emelie, to see what the outcome would be.
http://freenrg.info/Sprain/Paul_Harry_Sprain_magnet_motor.avi
I know by fact that he is using 2x2x1" rotor magnets and I suppose he used the most regular grade N35.
From knowing the rotor magnet dimensions I estimated the real size and stator gradient of the entire motor.
His output claim on this motor was about 7W on the shaft at 90 RPM, and 3.1W going into solenoid. Meaning 4W surplus of Overunity.
Well, on to the good part. My calculations showed 7.66W output at 90 RPM. Now this is extremely close to his claim of 7W.

Just imagine my own design at the calculated 4.5KW output at 500 RPM.
Suddenly it seems even more likely I'm right on track due to the new numbers that prove his old claim.
Why shouldn't the formula be true on my own design when it fit's the Emilie. Soon we will know.
I guess the motor will be assembled and ready for testing within 1 1/2 month from now.

[acp]

This is great news Honk, I'm looking every day at your updates. I agree also that bigger will be better, I believe the friction losses in a very small motor would not be much smaller than a larger motor, and as the larger motor is going to produce more power for not much more friction it will be more efficient.

One small question, possibly stupid, Sprain motor was running at 90 rpm, and you estimate 500rpm for yours. Why do you think Sprains motor ran so slowly?

[Honk]

One small question, possibly stupid, Sprain motor was running at 90 rpm, and you estimate 500rpm for yours. Why do you think Sprains motor ran so slowly?

Not stupid. Good question. 

Well, simply because his first prototype had extremely low torque. I have calculated the stall torque to 1,2ft-lbs.
It's the force of the stall torque that is the causing the free RPM. The stronger the stall torque, the higher the RPM.
And I know by fact that his motor was free spinning at 180 RPM at no load. The 90 RPM was at 7W load.
The torque of an electric motor is a linear line between maximum torque at zero RPM and zero torque at maximum RPM
From this I can cut the stall torque at 1,2ft-lbs in half at 90 RPM, giving 7.66W at 0.6ft-lbs.

I'm happy to see that at least you find my ongoing development interesting.
Not many other readers here at OU forum seem to care to much.
But I'll push forward and finish the motor and if I'm not totaly wrong on this I will get myself a strong OU motor.