Pulse Motor Video

[ian]

Hi, I just weighed the the neo magnet with a scale for more than 30 grams. It weighs 50 grams.

So:

0.5 x 0.01 F x 12,5Volts2 / 0.05 kG x 9,81=  0.7964 Meters.

Did you misscalculate it ?
I get 1.59 Meters for this as the result...

Regards, Stefan.

... could be.. it's late and I'm tired...

[ian]

Hi Ian,
in normal motors you always have the counter EMF voltage, when the rotor
magnet induces back into the driving coil ,so you always have to put more
power into the driving coil than your rotor magnet delivers...

But this may not be the case, if you do it via repelling pulses as you do...
Anyway, with fast pulses you have a dynamic system and as you need
to put energy up into the coil to build up the field,
it takes longer when you use more wire and the inductances
of the coils gets bigger...

So I am curious to see, if you will find a a way around it and
can violate Lentz law this way...

Please keep us informed.
Many thanks.
Regards, Stefan.

A few years back I was in contact with a fellow at a major university who built and tested many pulse motors. He said that because we are repelling the magnet, that the stator field direction was the same direction as the induced magnetic field so they reduced the lentz effect...

but yes, well see... wish i had a milling machine right about now.. :-)

Thanks again,
best regards,
ian

[ian]

Hi, I just weighed the the neo magnet with a scale for more than 30 grams. It weighs 50 grams.

So:

0.5 x 0.01 F x 12,5Volts2 / 0.05 kG x 9,81=  0.7964 Meters.

Did you misscalculate it ?
I get 1.59 Meters for this as the result...

Regards, Stefan.

I'm not big on Lorentz... but I just had a thought here.. put a magnet on each side of the coil, then add the two distances... maybe I'll try the experiment again to see...

[ian]

Hi everyone...

Thought that I would share my latest experiments with the group...

http://www.youtube.com/watch?v=Y_wdcsWiZCY

This is a modification from previous experiments. The rotor is bigger and uses powerful rare earth magnets. I built a special commutator because I wanted to use the previous proven circuits on this model but reed switches can't handle the high current and transistors only work on the negative side of the coil bank where the circuit required the switches on the positive side. So I made an adjustable commutator. One of the circuits did not work with this model so far. In fact, these magnets are so strong, that when supplied with the large current needed to get the rotor up to working speed, I believe I over-saturated the small cores of the coils.
Still more test to do on this model.

On the first half of this video the motor is running on 24 volts using this circuit,
http://www.mintakafulcrum.net/Instructionsmk4.htm
which did seem to work to some degree as the motor does appear not to draw extra current under load.

I'll do more testing but I need six batteries to do this properly.

The second half of the video the motor is running from one battery bank and with no recovery circuits. The draw goes up considerably under load.

The circuit that i was hoping to use, did not work at all for some reason...
http://www.mintakafulcrum.net/Instructionsmk5.1.htm

If anyone can tell me why, It'd be greatly appreciated...

Thanks in advance,
ian

[Thaelin]

Hi Ian:
   Have built quite a few of this style of motor. One thing I should bring up for you at this stage is your amp readings are misleading. The reading you are seeing is an average of the actual. What I mean is you are seeing pulses, not a steady amp draw. If seen in a scope it would be a series of spikes instead. To know the true draw of a coil is to hook it up to a batt long enough for the meter to level out. I some times could see six and eight amp draw on one of the coils and it had six. You also have to factor in time of the pulse as well.

   On the link to the push/pull circuit, I see no reason it would not run. Since I was not able to see your setup, it would not be fair for me to comment on what my thoughts would be. Happy experimenting   

thaelin