Quote from: hoptoad on April 13, 2012, 10:48:52 PM
Just wondering what sort of behaviour you'd get if you used air core coils. ?

Cheers

A lot weaker coupling and output.  To really understand what is going on.  I'm going to have to monitor current and not just voltage.  Current lags in the motor coils.....
I'm just getting started here.....hard to overcome that emf and utilize it!

Ben K4ZEP

Quote from: k4zep on April 13, 2012, 10:53:02 PM
A lot weaker coupling and output.  To really understand what is going on.  I'm going to have to monitor current and not just voltage.  Current lags in the motor coils.....
I'm just getting started here.....hard to overcome that emf and utilize it!

Ben K4ZEP

Yes, I would expect a much weaker coupling, but with no core drag or core attraction to offset the weaker coupling, results may be significantly different.
Just a thought.

Cheers

@ hoptoad and k4zep:

I kind of like air core coils. A core (iron, ferrite) introduces a lot of difficult to control material parameters and the wave forms produced by the coil become strange (spiky and deviate from the ideal sinus).

It is not very related to this motor, but playing with Joule Thieves I learned to appreciate air core coils. Just by adding or removing windings one can easily fine tune.

It is impossible to change the material characteristics of toroids or any other type of core. Specially when experimenting at home the options are very limited when using ferrite or iron cores. Chances are very high one is using the wrong type of core which dampens sutler effects. The famous people building pulse motors in the past were endlessly searching for suitable cores and went to extreams mixing their own materials, which can only be done in a very good chemistry lab and by help of computer calculations and simulations.

Air cores need more wire windings but one has complete control over the shape and size of the coil which can be wound around a cardboard or plastic tube which are very easy to build or can be found easily.

The high inductance ferrites allow for very small coils, but size is not such a big problem when experimenting. Once a new principle has been found with air core coils (and their pure sinus wave forms), material scientists can determine just the right mixture for a suitable ferrite in order to make everything smaller.

Just some thoughts, greetings, Conrad

Quote from: conradelektro on April 14, 2012, 04:54:34 AM
@ hoptoad and k4zep:

I kind of like air core coils. A core (iron, ferrite) introduces a lot of difficult to control material parameters and the wave forms produced by the coil become strange (spiky and deviate from the ideal sinus).

It is not very related to this motor, but playing with Joule Thieves I learned to appreciate air core coils. Just by adding or removing windings one can easily fine tune.

It is impossible to change the material characteristics of toroids or any other type of core. Specially when experimenting at home the options are very limited when using ferrite or iron cores. Chances are very high one is using the wrong type of core which dampens sutler effects. The famous people building pulse motors in the past were endlessly searching for suitable cores and went to extreams mixing their own materials, which can only be done in a very good chemistry lab and by help of computer calculations and simulations.

Air cores need more wire windings but one has complete control over the shape and size of the coil which can be wound around a cardboard or plastic tube which are very easy to build or can be found easily.

The high inductance ferrites allow for very small coils, but size is not such a big problem when experimenting. Once a new principle has been found with air core coils (and their pure sinus wave forms), material scientists can determine just the right mixture for a suitable ferrite in order to make everything smaller.

Just some thoughts, greetings, Conrad

Hi Conrad and Hoptoad,

Everything you guys say is right on.  As simple as it looks there is a beast here to tame!  The contra EMF is a problem,
got to think on phasing here.  Right now I don't see how the unipolar concept can work.  The generator action is X amount of braking and unless I can get the magneto or open contact burst more while cancelling out the core, it is a problem!  So will be messing today, hope my mumetal comes in......

Without building one of these no matter how simple, it will never be figured out.......Did either of these devices come
out on April 1st?

Ben K4ZEP

In larskos vid where he shows a correction to the schematic, I find it hard to believe that such a mistake could have been made in the first schematic. After all the conniving care he took to build and put on a controlled demonstration, he didnt remember which way the battery was connected? I dont get it.

The first schematic will work as a motor and flash the led. And give back to the battery, not explained by him in the vids.

But now he shows the update circuit that only takes from the battery. 

What is going on here? 

First a self powered motor. Then its a battery powered that gives back to the battery(not specified by him though). Then just a battery sucker. Whats next? He really had a D cell in the coils?  Was all just a good 3D animation?

Something is very weird about all this.

The first circuit is the interesting one. Whether he knew it or not. Its almost Tesla weird in style. 

Mags