Newman Motor #3 by detrix42

[detrix42]

Diode appears backwards in the first schematic.

Do you have an ammeter that measure frequency of AC?

Your circuit may not be oscillating at high enough frequency to jump the voltage up between commutations.

maybe i'm rusty on the newman concept, ..does the commutator switch polatiry of the current through the windings between commutations.  This may seem like a silly question this late in your postings...

but you may be able to use this to you advantage.  collapse through one winding may give you a voltage boost just like the joule thief would.  as it collapses, this back emf could possibly be translated to the other coils with diodes.  I think this is what Newman was talking about when he said he uses diodes instead of his normal commutator.

Which makes perfect sense.  ..a redirected magnetic field would cause greater efficient use of the energy in the system.

ooops the diode is backward.  Darn it.  I did not even think to consider its polarity for the drawing. 

Polarity is reversed every 180 degrees.  Not between segments, though it is shorted out to collapse the field.

I have wondered if i could turn my coils into a JTC, or an auto-coil. I am seriously thinking  about it.

[jadaro2600]

You could make the JTC astable.  I've done this, it is supposed to create AC on a secondary.  You could look about 400-500 posts back on the JTC thread or check my profile page and show my posts to find it, it includes a schematic for a,multi-transistor version.

The switching would be independent from the speed of the motor, you would just need to create two independent DC sources and figure out how to commute them properly.  This would require a few changes to your brush mechanism.

[detrix42]

You could make the JTC astable.  I've done this, it is supposed to create AC on a secondary.  You could look about 400-500 posts back on the JTC thread or check my profile page and show my posts to find it, it includes a schematic for a,multi-transistor version.

The switching would be independent from the speed of the motor, you would just need to create two independent DC sources and figure out how to commute them properly.  This would require a few changes to your brush mechanism.

  I did try my coils as a auto-coil.  Worked until the polarity reverses.  Oh well.  I have gutted a few other old electronic devices, and have obtained several more coils  and a 68uF 400v cap. to toy with. These will keep me busy figuring them out for a few days. 

[detrix42]

I posted this in the Joule Thief thread, but want to post it here as well.  Pretty much so I can find it latter, easier.

@all:  Here is something I am figuring out about the Joule Thief.  With my current setup, it does not matter what the input voltage is, I still get 120v out.  This is why a 1.5v battery drained to .5v can still power an LED.  This is very interesting. So what do I have to do the get more voltage out.  I would love to power my Newman motor with only 1.5v input.  My guess is the number of windings in the larger side of the coil.  So I will definitely want to try an automobile's ignition coil.

I believe you only need enough to bias the base-emitter junction of the transistor.  And perhaps the speed at which the transistor can be switched on and off plays a factor in how much I can get out of a JTC.  Hmmmm...............................

I have included a schematic of my setup, which seems to be the best efficiency (voltage wise, most bang per volt).  I did not include a voltage value, because it seems to not matter.

[jadaro2600]

I'm going to eventually build my own.  Based upon the principle I witnessed as such.

I had a round magnet, and placed it vertically in a solenoid, it was roughly the same diameter is the inner coil ..so it rested at two points on the sides, and it very slowly  would go vertical.  I think it was generating a decent current in the coil as it did so.

But, I'm going to take a different route.  I think your prime mover ( rotor ) assembly is too heavy, but I don't actually know what the weight is, or the prevailing math behind it for that matter.

What i would like to try is a similar setup, on a much smaller scale.  I think the voltage through the coils, relative to the intensity of the magnetic field will give me good rotation.  I want it to be voltage oriented, so I doubt it will produce any torque.  ..I may attach a fan blade or something to it as a load.

The device may be AC oriented if I were to rotate it..