Is this the first selfrunning overunity motor w/o batteries ? Mike?s motor

[hartiberlin]

Hi Dave,
many thanks for the scope shot.
But where was it taken ?
At the cap or at the main coil ?

Why are there so many oscillations going on ?

From the corrected scopeshot
scope_main_coil_corrected.jpg
it seems you are confirming, that the spikes go negative
and Mike did indeed posted inverted scopeshots,
so my corrected versions are correct.

Do you agree ?

Maybe you transistor circuit is not
tuned or setup right or has too much amplification, so  you get
these huge oscillations at the switching voltages ?

Regards, Stefan.

[CTG Labs]

The scope is connected where the bridge is connected to the main drive coil.

If indeed this is where he took the measurement, then yes, I confirm it must have been inverted.

There are many spikes because as the magnet passes the trigger coil a feedback oscillation is created then between the drive coil and the trigger coil which lasts until the magnet leaves the other side of the coil and it is these spikes in my opinion which can charge the cap.

Early days yet.  More when my new motor is ready.


D.

[omikron]

Hi

How fast can the rotor run?
I have an idea how to improve the efficiency of the drive circuit.

Usual diodes, developed for 50 or 60Hz mains supply rectifier are quite slow. When the current changes the direction quickly, they need some time to close. It is called 'recovery time' in the datasheets. During this time, the current can return back and the energy is lost. For all applications, where the frequency is higher than few kHz's or very narrow pulses are rectified, use diodes that are marked as "fast diode" or "for TV line output". I dont know which diodes are available in your home country, but try to replace all diodes, including the bridge ones by the fast types.

And the same about the power transistors driving the main coil. I can recommend Motorola's MJ15003 for NPN and MJ15004 for PNP. They can drive up to 15A and 200V at up to 15MHz safely and are available worldwide. They are used in well known Leach amplifier too.
The small transistor can be BC546 or similar.

Also use the capacitor with "Low ESR" mark. If you dont have the capacitor with reduced ESR (Equivalent Serial Resistance), you can use ordinary types too, but build the battery of smaller capacitors instead of using one big capacitor. The internal resistance of parallel connected capacitors will be didided by the number of them. So 10x2200microfarads are better than 22 000 in one bottle.

This will save some energy.

Tom

[hartiberlin]

Okay, ALL,
I am back from my cellar and cleaning up my old
Newman machine.
Was a good idea back then to partition the coil into 3 subcoils...

Here it is.
Stay tuned for some scopeshots.

Regards, Stefan.

[hartiberlin]

The scope is connected where the bridge is connected to the main drive coil.

If indeed this is where he took the measurement, then yes, I confirm it must have been inverted.

There are many spikes because as the magnet passes the trigger coil a feedback oscillation is created then between the drive coil and the trigger coil which lasts until the magnet leaves the other side of the coil and it is these spikes in my opinion which can charge the cap.

Early days yet.  More when my new motor is ready.


D.

Hi Dave,
thanks for the info.

Now we know for sure, that Mike accidently has inverted all his scopeshots,
probably due to the common ground setup and he forgot to press then
the invert button
on his scope input channel.


Dave, why do you want to build a new motor ?

Can?t you just try to tune the current one ?
With some iron plates glued onto the rotor,
so you will have a hexagonal rotor you could probably easily
stick the rest of your magnets onto your rotor.

Then you could try to use a reed relay switches to switch
instead of the transistors and SS relay for instance.

The trick seems to be to switch at least 2 different voltage
coils
in series and then in parallel across the cap while
the rotor is turning at the right intervals.

Regards, Stefan.