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@Rod,
The ratio follows the often mentioned (on the huge OU forumj thread) 2:1 ratio. The coil being twice as large as the core. However, the magnets are only what I have from hard drives or CD-Rom drives and so that's why you often see a couple more on the back etc.
The plastic middle former piece that surrounds the core creates a distance to the coil itself. In other words, the coil doesn't sit right on the core, it has a plastic layer between. The bobbins themselves are wound to give a 2:1 ratio and that is about the way they sit anyway with their plastic end pieces.
I tend to use a small spacer of something non metallic on the backs of them now, after reading about outputs increasing like that. The optimal distance for such spacing to a magnet is, I believe, just at the change over from repulsion of the rotor magnets to attraction of the core. The downside of that, is that the magnets fall off the back unless glued !
Originally posted by Michael John NunnerleyView Post
Repulsion or attraction, is that the question? well it is both, timing is ALL.
When using a multi wound coil "litze" you can have both, the lead in is what you put in power wise, the lead out is the BEMF "a kick in the back side".
By connecting your windings in the right way you use one too pull in and at "just" past TDC you use another with reverse polarity to give a push away, timing is all important, but this comes through design and is not difficult. The push away comes FREE from the BEMF, you use it to your advantage.
So to recap, you use your drive coils as both a North and South field, a negative and a positive drive, a bifiler is sufficient, one coil is powered and the other is powered by the BEMF of that drive coil but connected in reverse. What you need to do is make sure the BEMF ONLY energises the secound coil connected in reverse, this is done with a simple diode setup.
With this you will have an increase in power exactly equal to the power of the BEMF. Think about it in your mind the kick as the rotor JUST passes TDC.
This is only to help a little, more can be done with this using particular frequencies between the pull and push.
Think hard on the last paragraph, it is the ultimate motor/generator
Mike
Very nice... I see it now. The collapsing field have highest repulsing current at TDC then decrease. A mirror image.
Repulsion or attraction, is that the question? well it is both, timing is ALL.
When using a multi wound coil "litze" you can have both, the lead in is what you put in power wise, the lead out is the BEMF "a kick in the back side".
By connecting your windings in the right way you use one too pull in and at "just" past TDC you use another with reverse polarity to give a push away, timing is all important, but this comes through design and is not difficult. The push away comes FREE from the BEMF, you use it to your advantage.
So to recap, you use your drive coils as both a North and South field, a negative and a positive drive, a bifiler is sufficient, one coil is powered and the other is powered by the BEMF of that drive coil but connected in reverse. What you need to do is make sure the BEMF ONLY energises the secound coil connected in reverse, this is done with a simple diode setup.
With this you will have an increase in power exactly equal to the power of the BEMF. Think about it in your mind the kick as the rotor JUST passes TDC.
This is only to help a little, more can be done with this using particular frequencies between the pull and push.
Think hard on the last paragraph, it is the ultimate motor/generator
I have been obsessed with the Lenz law phenomena of late and trying to find a logical way to over come it or at least reduce it.
I am building and testing many combinations of parts. Coils, Magnets, Rotors and so on.
There are many things we know about the pulse motor generators we all build.
This one part of what I propose. A ring of magnets to in a complete circle with all polls facing the same direction. Using iron core coils with correct windings and accurate switching I believe we can shield from the Lenz law affect. If the ratio of coil to magnet size is just right it will be possible to even get a small amount of acceleration.
So far the crude tests have yielded positive results.
I posted this yesterday but it could inspire some of you:
Slider, what if the following picture also corresponded to a combination for bedini coils as well, it would go something like, coils get pulsed in the following order:
coils 3 6 9
2 5 8
1 4 7
let me know what you think you have
Cycles (the number combination)
Fractal patterns (the above figure)
Exponential functions (let's test it )
I'd like to express my thinking on the following things:
1/ effectiveness of a motor in repulsion vs attraction
2/ inductance dynamics
Below is the graph I analyzed with the two modes. The current growth in the coil is linear for simplicity. When in attraction, current end at maximum when it approaches top dead center. This yields higher torque vs current is maximum at somewhere further away from top dead center as in repulsion mode. So I believe attraction mode is more efficient.
Inductance of a coil change relative to the position of a magnet. I find that inductance decrease when a magnet get close to the core. However, I think we can make a configuration that cause inductance to increase when a magnet get close to the core. Though not confirm, I'd like to express my thinking on it. Referring to a vid by LaFonte group.
I consider the inductance of the coil is the movement of the arm. The more freely it moves, the more inductance. The two magnets at the two ends can be seen as bias magnets. Suppose we have the magnets at the two ends of the core configured in north-south(NS) or SN. The core is locked tightly in that set up yielding low inductance. Suppose the two end magnets configured in NN or SS of a core, inductance is normal as no magnet , in general theory. If one is stator magnet and one is moving, the NS set up gives a decrease in inductance as the magnet approaches and the NN or SS set up gives an increase in inductance as the magnet approaches. Normally, an electromagnet would yields lesser inductance as the coil is energized. But suppose we want inductance to increase with increasing current... follow by an inductance decrease...
I have been obsessed with the Lenz law phenomena of late and trying to find a logical way to over come it or at least reduce it.
I am building and testing many combinations of parts. Coils, Magnets, Rotors and so on.
There are many things we know about the pulse motor generators we all build.
This one part of what I propose. A ring of magnets to in a complete circle with all polls facing the same direction. Using iron core coils with correct windings and accurate switching I believe we can shield from the Lenz law affect. If the ratio of coil to magnet size is just right it will be possible to even get a small amount of acceleration.
So far the crude tests have yielded positive results.
I would suggest a name: Rod's motor-generator variant
I like this setup you show in the pictures with the so many magnets next to each other, this confirms a thought that the more flux you bring in from permanent magnets the better you can come out energywise.
Regarding the drive coil(s): may I suggest to to take a look at this link that shows a kind of strong electromagnet: How to make bedini motor overunity ???
Perhaps a cylindrical sleeve ferrite core with a cylinder Neo in its center could be tested, the length of the magnet should be less than the sleeve core length.
Do you have output measurements already on this setup I wonder.
This has been a project I have been formulating and designing a long time.
The final idea was the Muller motor magnets of Romero.
I wanted to put them on the other side of the coils in a tight circle.
What if we wanted to eliminate the Lenz drag completely?
On my early test the coil load has no effect of the motor at all.
Thanks to slider I now have a coil to drive it.
Along time ago I built a few permanent magnet motors and noticed that if you put a complete circle of magnets very tightly together around a rotor with magnets facing it directly. There was no driving force at all also any drag force either. As long as all the magnets are pole facing the same direction attraction or repulsion it does not matter.
....
An experiment this evening, running a 7 strand coil from a Joule Thief.
The coil sits in parallel with the usual LED of such circuits.
It runs very well, first JT motor for me and the odd thing being that I couldn't get any other coil to work. tried half a dozen, from relays, to self winds and I have no idea why but only the 7 strander would work. I know i've seen Lidmotor run such motors, so am a bit puzzled.
Current used is 25mA.
1.2V ancient and rejuvenated Ni-CD
Transistor is a 2SD879, resistor is 1K.
The JT features a Fibonacci toroid, as I call it. 34 winds on one side, 13 on the other. The white LED is very bright indeed.
Next stage, is to use some of the Muller tricks to see what might be drawn back off the circuit.
@Joit,
Great idea
Yep i'll try that. I have a JT and reed switch based pulse motor running with one of the coils at the moment on 1.5V, but will see about adding pots in the near future. It's an intriguing thought to see what may happen with capacitance restrictions and changes. If a resistance improves in some way some running of the coil, then that added resistance could be replaced by a useful load.
@yx
Will that sort of bulb work on DC ?
In my case, the 0.32uF capacitor pair connected one end to the neon and one end to the positive supply. The other side of the neon connected directly to one of the output wires of the coil.
So, really, they are quite different circuits unfortunately.
For your circuit and from what I have learned up to now, I would advise placing about a 0.33uF capacitor in series with a coil output lead. Which one works is the one you use. If it's the wrong one, then normally the output is much less than without the capacitor fitted. Again, there seem to be tiny differences of values that we can use. Some too high and some too low.
The way that Toranarod lit his bulbs would, i'm sure, better suit your circuit. Yours and Toranarods are a few steps ahead of mine !
You guidance suggested "but I added a 0.1uF and a 0.22uF HV capacitor between the positive rail and 1 leg of the neon"
Because the google translation is not accurate, I drew a picture, Please help me sure I correctly understand what you mean: Your proposal to 0.1uF (0.22uF) HV capacitor, Accordance picture Ca or Cb connection?
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