Bedini Ferris Wheel Regauging Motor

[nvisser]

Miniature energizer

Double post

[redrichie]

I got a good deal on a rotor much like John K. A 4 ft round table. I plan on making "spokes" that extend out from the round to make a rotor at least 6 ft tall. Cant go any larger and it fit in the house, and have coils underneath rotor. could go almost 8 ft and have coils to side but didnt know if it would effect the design. Also would rather replicate as close as possible, like others, then expand from there.. The table top weighs in at about 30 lbs. with spokes I estimate weight to be around 80 lbs.
I have a question on magnets for this size rotor. Any suggestions? It seems like some of the common sizes are 3X2, 4X1, and 6X2. I am going to try for quadfilar 18-20ga at 1000 ft each. so about a 20 lb coil. (2 large rolls). any help here would be greatly appreciated.
Also, does core size depend on magnet dimensions?

[nvisser]

Thanks to Rs for the PM about my deflection plate. I corrected it so it forms the upside down triangle like John explained. See photo in previous post.
I also adjusted my cap value so that I get the maximim voltage rise in 1 second before dumping.
It does perform better. Next I want to try a small dc bias on a single mag amp winding on the main coil to see what happens.

[genessc]

Hi John K,

The shield becoming a south isn't to odd of a behavior. It makes sense to me. Its in effect the thing collecting the flux offset on the bottom half of the coil core as it collapses back into the bloch wall which originates as the plane of division on any solenoid coil. The repelling pulse makes the top of the stator north and the bottom a south... Extending the core out the bottom of the stator shifts where this plane of division is "centered" and if you make the core twice as long as the actual coil height, then the other "half" of the polar force on the stator will not be on windings but just on the core itself and back into the shield when it collapses. Perhaps this aids in the asymetric reguaging pull in of the next magnet as well since the south on the stator will draw thru the scalar south (presuming it exists on such a large diameter rotor).

If you put the compass near the top of the stator, does it still register a south?

Actually I forgot you're in australia so you have prolly built with all souths outfacing and with the stator windings on the bottom half of the coil yeah? In which case the above maybe doesn't fit. (or perhaps it still does... )

Pulsing the coil with a south on top to repel the rotor magnets would perhaps create a coil with shield polarity like this:

S <only core rods>
N
--- <shield>
[S]
[N] <windings>

So that each repelling pulse polarizes asymetrically to retain a S on the shield to draw in the next north?

As you say "I'm just throwin a line in the pond... "

Take care,
Gene

Hi All,

I Hope you all had a good Christmas. Unfortunately I came down with the flu on the first day of my holidays but managed to spare a few hours in the shed on my "S1GT".

I now have it running on some good deep cycle batteries, configured for 36V on the front and back end. I ran it all day. The front end settled into 36.7V whilst the back end would not get above 39.7V. The cap is now 13,600uF 50V and dumps in just under a second. After resting for an hour the primaries recovered to 37.0V whilst the secondary bank is at 39.2V.

The SCR is now triggered with a 1N4732 (4.7V 1W zener) in series with 2 x super bright LEDs which dumps at around 8V over the top of the battery voltage.

One very interesting observation - the shield on the main coil has been permanently magnetized and shows that it is a MONOPOLE South pole ALWAYS! I could only pick this up with my compass when I had the coil and the bonded shield on my bench away from any other magnets. Weird!!

Back to bed...


John K.

[genessc]

Nvisser,

Lookin at your picture of the stators... Per Bedini the rod cores should extend double the coil height so they are sticking out the bottom of each of the two side coils. Seems like he also said something about this happening also on the main coil as well... which was hidden from view on the big wheel at the show.

Just a thought... might change the flux dynamic.

Regards,
Gene

This is my attempt to try what was done on the ferris wheel.
No surprises so far.
It is a 30 cm wheel mounted horizontal on a big pc fan.
Main coil 11 Ohm single strand. Slave coils 5.5 Ohms. Mounted with the offsets as prescribed. I have not tried the mag amp theory here.
The cap pulsar consist out off a 14 500 uF cap charged up to 24V before it gets dumped by a 7.5V zener, 3V bright led and a scr.
The timing and dwell is adjustable.
It draws about 300mA and dumps only every 4 seconds.
Bending the plate on the main coil does not really show any difference in performance.
I had to move the coils away as far as possible from the magnets otherwise it runs to fast and the SCR stays on. I am not sure if it will perform better at higher revs and will try the mosfet pulsar later to test at high revs as the fet pulsar has not got the switch off problem at high speed.

YouTube - Picture 004

[John_Bedini]

Bedini Gt3

Brent,
I like the way that wheel looks.
JohnB

Hello All,

We are SO EXCITED how our build is coming that we had to share the progress...

And when I say we, I am talking about myself and my business partner Scott or better known as (Txaggie00).

We completed one side of our 6' wheel today and hope to have the other side done by the end of the weekend. And if we're lucky we will have the A frame completed as well. We wanted to go much bigger, you know how we are in Texas, "Bigger is better," but we just didn't have anywhere to put it.

As you can see we took a similar approach to John B with our design. We had two templates (center circle and magnet holder) cut out of metal at a local water-jet shop so we could maintain a very tight tolerance. We then routered out the wood while using the same templates to use as guides to attach the spokes. This allowed us to have a very precise construction. All the raw materials have been purchased from Lowe's thus far...trying to keep it some what simple and inexpensive.

We have a lot yet to do and even more to learn! Looking forward to every moment


@Luther - Scott asked me to add to this post that he sent you a PM


Happy New Years, Brent

[John_Bedini]

Bedini GT3

It will take me some time to go through all the posts, then I will say what I have been working on.
John B

[chuck H]

2nd cap dump circuit using a fet

@all,
sorry I was wrong on that second coil and cap dump circuit. It was not working how I thought it was. I will keep trying and post some better news on that one later...

[nvisser]

Nvisser,

Lookin at your picture of the stators... Per Bedini the rod cores should extend double the coil height so they are sticking out the bottom of each of the two side coils. Seems like he also said something about this happening also on the main coil as well... which was hidden from view on the big wheel at the show.

Just a thought... might change the flux dynamic.

Regards,
Gene

John said that the core extended 3" below the bottom of the core on his coils, so that is about 25% of the coil.
He also said that in the southern hemisphere we have to extend it to the top.
Everything else stays the same.
If you look again you will see that my core stick out 25% to the top.
Vissie

[genessc]

Ah gotcha, you're in the southern hemisphere too. My bad.

Gene

John said that the core extended 3" below the bottom of the core on his coils, so that is about 25% of the coil.
He also said that in the southern hemisphere we have to extend it to the top.
Everything else stays the same.
If you look again you will see that my core stick out 25% to the top.
Vissie

[genessc]

SG solid state mag-amp.

Hi John,

I initially thought the 3rd winding could be made to be the AC winding to do the triggering of the SG circuit. I then realized that wouldn't work and that I'd have to use an external coil, preferably one in parallel resonance so that it draws as little as possible to provide the AC sine for the SG to trigger against. Thus this winding would have to sit on top of the stator and would just be the AC from the mains or some inverter... The problem here is that the Frequency then is limited to that of the AC source, aka 60hz if using mains. One would need to use a freq adjustable inverter to get into the SG frequency range.

My 6 pole 6" diameter rotor tends to run between 2000-3200rpm which equates to a sine frequency of about 200-320hz.

I've been thinking about this since you mentioned it before the break. I'll soon try it with the mains and see if it triggers and pulses like I expect it to. If it does, then I maybe will have to see about getting a frequency adjustable inverter or making one from scratch.

Just thought I'd share my own correction to my initial thought in case anyone was following along.

Take care,
Gene

[Web000x]

John said that the core extended 3" below the bottom of the core on his coils, so that is about 25% of the coil.
He also said that in the southern hemisphere we have to extend it to the top.
Everything else stays the same.
If you look again you will see that my core stick out 25% to the top.
Vissie

Vissie,

I'm not sure how much of a difference it will make, but John Bedini said in post #84 in this thread that the rods extend 2" into the wood not 3".


Dave

[Web000x]

Vissie,

I'm not sure how much of a difference it will make, but John Bedini said in post #84 in this thread that the rods extend 2" into the wood not 3".


Dave

Sorry to confuse people, but post #84 by JB says 2" and post #110 says 3". In later posts he also says the core extends through the shield by 3" so maybe it was a typo. Can somebody please clarify this?

Dave

[redrichie]

John,
or any of the guys here for that matter,
I posted this question to peter Lindemann but as I suspected it was in the wrong thread. I dont feel it belongs here either, But Peter said it was a good question and I should post it here.
To save some typing here is the post from the previous thread:

"I was not sure where to post this so i havent yet. And it may have been discussed in another thread I am not sure. But I have been retrofitting my Bedini Monopole to attempt the Large Wheel. I have a quadfilar coil with core that sticks out the bottom like John has. I remembered another thread some time ago where a user had done something similar to this and put a "piggy-back" induction coil on the extended core end. My induction coil is a small spool single filar coil of prob no more than 150ft of 23ga wire. After reading in the Ferris wheel thread about shorting one of the coil windings to itself to lower the inductance I decided to give it a go.
Upon shorting it on the running system there were semi-large blue sparks that popped at connection. Then the current draw went down over 50mA. and the wheel sped up as well. charging actually seemed to be faster. If I put my scope lead to this coil it has almost identical wave form as the rest of the Bedini circuit, but the spikes are noticeably higher. (edit here, when superimposed upon the regular H wave the spikes start and stop point are the same and peak is slightly higher than the source spike).
Or I can put this piggy-back through a bridge into a cap and run a small load with no losses to the original system. If you arent too busy could you explain the sparking of this coil.
Im sorry if this is a little long winded. But in a current thread by member Zooty titled SSG modification anomaly, I put one winding of a small Bifilar coil in series to the charge battery. The other winding of the bifilar i can generate over 200V AC. Put through a bridge I can run a small load from this mod. With it, current draw decreases slightly again, and there is not any decrease in speed or charging to the system. I know this is not directly related to this thread, and I apologize BOBO. The only reason I put it here was Peter mentioned shorting the coil. If I need to post this elsewhere like in the SSG mod thread I will."
I am not trying to take any credit for discovering anything. Part of this is Zooty's experiment, part is another users from a couple years back. I was just wondering about the sparks that are present when shorting the coil, and the fact that you can run a load with no apparent ill effect to the source.

[everwiser]

Sorry to confuse people, but post #84 by JB says 2" and post #110 says 3". In later posts he also says the core extends through the shield by 3" so maybe it was a typo. Can somebody please clarify this?

Dave

The rod extends 3" through the shield and 2" through the wood which implies (to me anyway) that the wood is near 1" in thickness. If so, both measurements given would be correct.