Newman Motor #3 by detrix42

[jadaro2600]

Nive, this is what the JTC is for.. I'm not real clear on how to read the disk cap lables either, I have an ammeter that reads capacitance for me, i just use that.

Check here for a potentiometer trick I like to use.  you can bring your potentiometer down to a 0 - 1.25m potentiometer

http://www.overunity.com/index.php?topic=8793.0

what transistor are you using?

[detrix42]

@Jarado2600:
it is a general purpose one I got a long time ago.  the numbers on it are

6256
N720

I have not looked up the datasheet on it.  Just went through the one I have, check that it was an NPN, put it in.  Though I probably should look at the datasheet to see the maximum voltage it can handle.

Anyways I now need to modify your design a bit.  The cap on the right needs to not discharge too fast in the beginning.  Once the motor is rotating at higher speeds, then a quick discharge is acceptable.  Though I only need the difference in potential (voltage) from the cap, but I need to be able to apply that voltage for about 2sec on startup of my motor.

[jadaro2600]

@Jarado2600:
it is a general purpose one I got a long time ago.  the numbers on it are

6256
N720

I have not looked up the datasheet on it.  Just went through the one I have, check that it was an NPN, put it in.  Though I probably should look at the datasheet to see the maximum voltage it can handle.

Anyways I now need to modify your design a bit.  The cap on the right needs to not discharge too fast in the beginning.  Once the motor is rotating at higher speeds, then a quick discharge is acceptable.  Though I only need the difference in potential (voltage) from the cap, but I need to be able to apply that voltage for about 2sec on startup of my motor.

This may not be the setup you end up with, but putting this extra diode on it will prevent polarity from reversing from the motor, you could probably safely get away with using an electrolytic on the right using the idea below.

[detrix42]

@Jarado2600:  Need some help.  perhaps I should post this in the Joule Thief thread as well.

Below is a schematic of what I have now, and it is working great.  With just 6.5v input, I am getting 100+v on the output.  The next pic is a pin layout of a transformer I want to use.  I hacked apart a printer/scanner.  I want to hook up the joule thief's output to it. So far the things I have tried is not working.  Again I am not much of an engineer...yet.

Yea, I will also post in the joule thief tread.

[jadaro2600]

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.