Maybe possible idea for duplicating effect of Holcomb and others

[Ufopolitics]

Hi Ufo,
I do understand what you are saying, but I want to be able to adjust the input power to the slip rings.  That way I can see what effect changing the input power has on the output as well as being able to adjust for changing speed of the input rotor.  If the theories about a virtual rotating magnetic field are correct as I go up in speed on the input rotor my output should increase in voltage.  By being able to adjust my input voltage I can then control all variables.
From what I saw on the two videos I believe he did not have all 3 phases going to the output alternator.  It just didn't act right.  I could be wrong but I am pretty sure he was only getting a single phase to the output alternator. 
Got to get back to work.
Take care,
Carroll

Hi Carroll,

I can tell you what will happen whenever you accelerate the field speed: Voltage Output will go up...but Amperage at Input will go down.

And that is exactly what I was saying before...that if you feed the brushes at generator, from a fixed, stable source, like a Battery...or a PSU...it will not respond directly to any of your Output demand, basically seen whenever you load it.

Whenever you loop the Alternator out to exciter (and you could still regulate it, by inserting a circuit in between with a potentiometer) it will be a proportionate response to any speed variation of the field you make.

Swear I will not bother you anymore (for today, lol)...I was just suggesting ways to be successful here.

Take care

Ufopolitics

[citfta]

OKay,


Got the alternators done and working.  Got a video uploaded that shows what the signal looks like.  I forgot that when I zoom the camera it blanks out the audio.  The only thing you probably missed is that the bulb in the video is a 120 volt night light.  Everything seemed to work just like I expected.  My only surprise was that if I short out the output the rotor on the output alternator stops.  I thought that by shorting the output the current would rise on the rotor and cause an increase in the magnetic field of the rotor and thus would have more torque.  But that doesn't seem to be the case.  If the rotor it freely turning and I short out  the output then the rotor stops.  I did not show that in the video.  But the video does show how the frequency and voltage increase when I stop the rotor.


Here is the link:
https://ugetube.com/watch/OTyaKIHaevI6co9


I hope you enjoy it.  OH and please ignore the messy bench.  But it takes a mess to make a project.


Carroll

[Ufopolitics]

Hello Citfta,

Thanks for sharing your video!!
Yes I did enjoy it!!
I will  tell you things that I noticed on your setup...that may need some attention...or maybe I am wrong...please correct me if so.

1- First, the Alternator Generator you are using must have a specific RPM to operate properly (You could search it according to year + model)...normally Alternators run on a low RPM, basically to keep charging the system even when Engine is running at idle (like 800 RPM's)...then Alternator would run lower than that.

IMHO, your Motor is driving it too fast...check at a lower speed.

2- Second, and according to your description, the PSU on left of video screen is for the motor...and the PSU on the right is to supply V & A to the brushes on the 3 Phase Alternator Generator...am I correct so far?
If so, then your Generator is receiving around 5 Volts (not even reaching the 5V line...so would say like 4.75V...and 3 Amps.
And that is not the right Voltage for an Alternator...Resulting that the Field you are generating is very weak, no matter if you get 10 Amps....and that is based on the Alternator wire gauge being pretty thick (I would say they have like 16 gauge easy) then resistance is very low...so, your PSU would react according to those parameters then compensate its output.

IMHO, it is too low Voltage for the Input.

As a result, when you short the output it will stop the free rotor at the rotating field/output set.

3- Finally, in your Output set, if the rotor rotates...then it will not Output at Max range.
The Rotor is supposed to be static, so that the Field changes are reflected on a static core...if it moves, then it will travel with the rotating field...no radical changes would be seen by Induced Coil...so, it is like a rotating transformer, where primary and secondary are spinning.

Anyways, would love to see the Three Sine waves generated by the three wires going to the second alternator on a 4 channel scope...if possible.

Excelent video, thanks again for sharing!!

Regards

Ufopolitics

[bistander]

I think the output rotor is always turning slower than the primary alternator, therefore the scope frequency is the difference between the two, correct? Assuming the two have same pole count.
Nice job, citfta.
However I still contend, the output coil sees an alternating flux, like a transformer, not a moving or traveling flux, like a generator armature coil. I don't know a simple way to verify that with the hardware.
bi
edit:
The second alternator is actually running as a combined motor generator. It is inducing rotor current like an induction motor while you pick off armature generated voltage to power the lamp. Cool. Not sure that I can explain why it stalls when shorted, except it drops below breakdown torque value.

[citfta]

Hi Ufo,


Your observation are correct except for one thing.  Although a car engine does operate at a wide range of speed the pulley on the alternator is much smaller than the pulley on the car engine therefore the alternator actually turns much faster than the speed of the car engine.  The scooter motor I used in the video does not have enough torque to turn the alternator at high speed if I turn up the current going to the slip rings of the alternator.  I did try turning it up more but as the current went up it overloaded the scooter motor and caused the current to go up too high on it.  You have to remember that a car engine has much more power to drive the alternator than my little scooter motor.


I did actually look at each one of the phases individually with the scope before I made the video and I could remake the video with one of the phases and the output showing at the same time.  I do have an old 4 channel scope but it died on me a while back and I just haven't taken the time to repair it.  I guess I need to do that one of these days.  The scope I am using now only has 2 channels.


As you may have noticed I did stop the rotor several times.  I only let it free rotate to show that even then there is voltage and current being generated but when stopped the frequency of the generated power and the voltage of the generated power both went up.  So there is definitely a moving magnetic field being generated.


I see Bi made a comment while I was typing this.  I think the above paragraph addresses his comment.  If there was only transformer action I don't think stopping the rotor would cause the frequency to go up.  Also if I slow down the drive motor the frequency goes down.  And Bi what is causing the rotor to rotate if not a rotating field?


Carroll