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

[Honk]

Hi Honk!
I just read you're already ordering the magnets...

No, I haven't placed the order yet. Still waiting on the best price.

Thanks for the other suppliers.
Actually I reguested a an quote on 200 custom wedge shaped motor magnets 1.5 years ago at both Neotexx and Magnesy.
Neotexx quote was at pricy $1640 US, shipping included.
But Magnesy was cheap at $515 US, shipping included.
Guess who got the order from me.

I hope Magnesy is still competitive in the custom magnet business.
They are reliable and always deliver on time.

[nightlife]

Here are a couple sites you may want to check out for magnets.

http://www.armsmag.com/index.html

http://www.amazingmagnets.com/index.asp

[Honk]

Here are a couple sites you may want to check out for magnets.

http://www.armsmag.com/index.html

http://www.amazingmagnets.com/index.asp

Thankyou. I checked them out.

Quoted from www.amazingmagnets.com
"We are unfortunately unable to produce very small runs of products due to overhead involved."
"If you are able to use a quantity of a specific part, please let us know and we'll let you know what the minimum quantity is for a given size."

[Low-Q]

Wow, pretty expensive. That equals to $2450 US.

I hope my own magnet request comes out cheaper.
I'll get the price in grade N38, N45 and N50, perhaps this week.

I sent the request to both www.magnesy.eu and to www.magnet4less.com but only Magnesy have responded so far.
They'll get back to me soon. Just to be pricewise I guess I will have to get more quotes from several other suppliers.

Don't forget to keep an eye on the updated Drawing pack.
http://www.overunity.com/index.php/topic,3456.msg58338.html#msg58338

If it works with neos, it should work with ferrite magnets also. Much cheaper.

Vidar

[Low-Q]

Now I have done some simulations on the Paul Sprain motor. My findings are not very suprising, but nor as expected. I made a spiral out of 22 magnets. A rotor with 2 magnets. The sample steps is in 15 degrees, one for each magnet. The end of the magnet array I did put pure iron which I turned into a magnet for 15 degrees - that should be approx 25ms in 100 rpm.

First I simulated the sum of all forces during one revolution where I just leaved the iron be iron for the whole revolution. The sum of forces is almost zero. Hav in mind that the resolution is only 15 degrees, so I did get +669Nm in total which is an average of 27Nm in one revolution. Taken in account that the most torque measured was between +80 000Nm -80 000Nm, 27Nm is as good as zero.

Now I turned on the electromagnetsimulation for 15 degrees. The sum of all torque is now -34 000Nm with an average of 1416Nm. Average torque is what that counts to calculate the energy output.

So then I did remove the stator magnets, and leaved the electromagnet alone. Guess what! Average torque of one revolution is 3250Nm.... Well, the corase resolution are playing with me here, so make your own conclusions.

PS! The motor in my simulation was made 5 meter in diameter and 1 meter thick, hence the high torque.

If you want to play with this simulation, a FEMM file are attached here. Use LUA script attached. It can be modyfied to suite your own measurements, but make the last iron piece in the stator into an oposite polarized magnet for 15 degrees rotation starting at 90 degree of the rotor and clockwise.


Br.

Vidar