Virtual Rotating Universal Motor Armature

[Jim Mac]

Others have tried this on other forums, but I wanted to throw my hat in the ring.  The idea is to rotate the field in a universal motor armature, then use the clam shell field coils as output coils.  

I have seen it tried 2 ways.  With rotating brushes and with electronics.  I only know of 1 build that claimed Successful Overunity, Pierre's build.  He used relays.

We all have opinions, and my current opinion is the other builds never worked because the rotating field was too jumpy and skitchety.  I remember Pierre said, the "Resolution" of the rotating field is very important.  Meaning that the rotation has to be smooth..  

Anyway, I tried tapping commutators in the past UNSUCCESSFULLY.  Commutator bars are difficult to solder to and making a spring-contact connector was too difficult for me.  I tried 11 prints and could not get it to work..

With the help of a Dremel, heat shrink, and solar tabbing wire, I was able to get all solid connections (after 2 hours of cursing)...

   

So next I will use an arduino MEGA and virtually rotate this sucker..  I may have to order some stuff for this, so piece by piece here..

[Jim Mac]

While my printer is chugging away on my other project, I can devote some time to this setup.

I need to control 24 contacts electronically 2 contacts at a time. And the polarity of those contacts must switch during the rotation.  

In order to meet these standards, I MUST use 4 digital pins of the Arduino per H-bridge.  I need 12 H-bridges X 4 pins = 48 pins.  The largest arduino has 54 pins. 

The reason I must use 4 pins on each H-bridge is because I must control the "Enable" pins along with the polarity.  If I did not control the enable pins, the rotor coil loop will have multiple places to ground which ruins the build..  

So here is where I am at..

   

My concern is the resolution of the rotation..  It's imperative the rotating field is not too jumpy.  It needs to grow and shrink as smoothly as possible..  With 24 contacts in a loop, this is probably cutting it close..  

Look at Pierre's relay bank...  Notice how many relays...  The resolution or "smoothness" of his rotating field is MUCH better than mine will be..

   

I know how to increase the resolution of my setup BUT I need more digital pins and H-bridges..  I do have more H-bridges and arduino Mega's so it is probably possible to increase my rotational resolution but I would need to do research how to expand digital pins on 2 arduinos. And the setup becomes much more complicated..

SO I will continue with 12 H-bridges for now and evaluate the rotational induced wave.  If it is too glitchy and jumpy I will have no choice but to either abandon the project or go all in..  So we will see..

Next comes the nightmare of wiring all these bridges!

[Jim Mac]

I will add here- I also believe this is the reason we can never get the Figuera generator to work.  THE RESOLUTION OF THE WAVE...

Using 16 contacts gives us 8 steps on the rise and 8 steps on the decline. This causes the inducing wave to to be "Stair-Like" and not smooth like a generator's wave..  So the increments must be Much Smaller and MANY MANY more than is usually built.

Nowhere on any of Figuera's or Buforn's patents does it specify to use 16 contacts,  only the elementary drawings depict this.  In Buforn's patents that no-one ever translates, he says the commutator closes on each loop of the resistor from first to last.  Meaning the resolution of the inducing magnetic field is tight and smooth, thus resembling a generator in motion.  NOT a series of pulses and flat lines.

So this electronic control circuit I am building could potentially be used for a new Figuera setup where the inducing magnetic field takes 24 steps up then 24 steps down, thus tripling the resolution of the standard 16 contact commutator.

Something to consider it this build does not work out

[Jim Mac]

It's amazing how quickly things become a Birds Nest...

NOT Looking forward to Debugging when issues arise!

   

[Jim Mac]

So Here Ya Go...

Confirmed Increase of Output with Increased Frequency.  Solid State.  Input does Not raise.

[Jim Mac]

if you are unsure what my circuit is doing, it is doing the exact same thing as physically rotating the brushes on a universal motor.    But it is doing it MUCH more efficiently and MUCH higher frequency than a motor can go.

The circuit Never breaks connection, it connects the next commutator contacts BEFORE breaking the last.  

Ultimately it creates Virtual Rotation of the magnetic field in the rotor without the rotor physically moving.

[ovun987]

So Here Ya Go...
Confirmed Increase of Output with Increased Frequency.  Solid State.  Input does Not raise.


if you are unsure what my circuit is doing, it is doing the exact same thing as physically rotating the brushes on a universal motor.    But it is doing it MUCH more efficiently and MUCH higher frequency than a motor can go.

The circuit Never breaks connection, it connects the next commutator contacts BEFORE breaking the last.  

Ultimately it creates Virtual Rotation of the magnetic field in the rotor without the rotor physically moving.

Super cool!

[Jim Mac]

Thanks OVUN...

Since the input is not raising, I have some interesting tests to perform this weekend.  I think I can increase the output outside the stator without affecting the input.

I gave my next idea a quick test run and it looks promising!

Good thing my weekend starts Tomorrow Night..  I'm pretty psyched over what I am seeing here..  I changed out the stator for a beefier one and my output went up a good degree more..

[ovun987]

Since the input is not raising, I have some interesting tests to perform this weekend.  I think I can increase the output outside the stator without affecting the input.

I gave my next idea a quick test run and it looks promising!

Good thing my weekend starts Tomorrow Night..  I'm pretty psyched over what I am seeing here..  I changed out the stator for a beefier one and my output went up a good degree more..

Can you explain what (in theory) is the path to overunity with this particular setup?

...Input always stays the same ...Output goes up with frequency. You started at 10,000 then went down to 5,000 then eventually down to 500us and every time your wave looked better and better because the time between switching was improved. You're pulling 14W and burning however much you're burning with the resistor. Output wattage went up every time you upped the frequency (lowered microseconds). Why did you stop lowering and not go down to 250us or 100us or 10us? Assuming input always stays the same which it has in your above video, wouldn't there be a point where output power reaches or exceeds your input power?

[vantasner]

Since the input is not raising, I have some interesting tests to perform this weekend.  I think I can increase the output outside the stator without affecting the input.

I gave my next idea a quick test run and it looks promising!

Good thing my weekend starts Tomorrow Night..  I'm pretty psyched over what I am seeing here..  I changed out the stator for a beefier one and my output went up a good degree more..

Can you explain what (in theory) is the path to overunity with this particular setup?

...Input always stays the same ...Output goes up with frequency. You started at 10,000 then went down to 5,000 then eventually down to 500us and every time your wave looked better and better because the time between switching was improved. You're pulling 14W and burning however much you're burning with the resistor. Output wattage went up every time you upped the frequency (lowered microseconds). Why did you stop lowering and not go down to 250us or 100us or 10us? Assuming input always stays the same which it has in your above video, wouldn't there be a point where output power reaches or exceeds your input power?

500 microsecond on-time is around 3500 RPM.  The Time Constant of the armature windings and circuit will influence the max virtual rotation speed.  T = L/R.  


Nice work Jim!

I wonder what the wave form would look like in a 3 phase Wye or Delta stator.