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Author Topic: Maybe possible idea for duplicating effect of Holcomb and others  (Read 14061 times)

Offline Jimboot

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Re: Maybe possible idea for duplicating effect of Holcomb and others
« Reply #75 on: August 29, 2022, 10:30:15 AM »
My stator cleaned up nicely. Got the circuit running last night before I blew a fet. Rotating the stator definitely changed the waveform off the rotor. Rebuilding with some other fets I have.


Offline matu

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Re: Maybe possible idea for duplicating effect of Holcomb and others
« Reply #76 on: August 29, 2022, 12:59:55 PM »
My stator cleaned up nicely. Got the circuit running last night before I blew a fet. Rotating the stator definitely changed the waveform off the rotor. Rebuilding with some other fets I have.



hi jimboot
A double-wire stator... could be used independently, one to rotate the magnetic field, the other for standard output, letting the rotor rotate, surely we would have a transforming effect as both are in the same core, but... we would have additional induction by being turning the rotor?... just to think.
Cheers

Offline Ufopolitics

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Re: Maybe possible idea for duplicating effect of Holcomb and others
« Reply #77 on: August 29, 2022, 06:48:05 PM »
Hello to All,

Here is the same exact Zafer ESC Diagram, except I have set Q1, Q2, Q3 in a "Cascade" arrangement, to be able to see the FET Modules and how they connect to each others.
I have just enclosed the Cascade Area for Q1 (light blue) and Q2 (light green)
Q3 is the end of the Sequence, therefore, it returns back to Q1 to restart cycle, through magenta colored circuits for D3 and R3.

So, if you all noticed, it is a simple Cascade diagram, where we could add more FETs Modules in between Q2 and Q3 to be able to drive more stator coils on future builds.

I will like to wind a specific stator with more coils circuits than 3...as also with lower gauge and more turns, to be able to rise Voltage and lower Amperage.

If you all noticed on Zafer Video, this circuit is driving coils at aprox 10 amps...In my opinion that is too high currents for a Generator exciter system.

After I make all tests related to original video with rotor spinning, plus check scope signals, etc,etc...I will insert a full wound static rotor taken off a small generator, to see the induction output capabilities of this setup.

Regards

Ufopolitics

Offline Ufopolitics

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Re: Maybe possible idea for duplicating effect of Holcomb and others
« Reply #78 on: August 29, 2022, 07:43:34 PM »
My stator cleaned up nicely. Got the circuit running last night before I blew a fet. Rotating the stator definitely changed the waveform off the rotor. Rebuilding with some other fets I have.

Hey Jim,

Man, that Alternator is a beast!!...on what vehicle that goes on?
I see that it has two strands of wire per phase...I figure you should have like 0.4-.0.3 Ohms resistance there!!

Reason why it blew one of your FETs...

I would try with just one strand on each phase.

I was checking out your FETs (IRF1405) and they have even higher spec's (capacity) than the IRF3205...So, when I look at your alternator image, then I  realized where the issue was.

Rotating the stator definitely changed the waveform off the rotor.

You meant, that when you rotate the Stator (Magnetic Field) "it changed the waveform of the Rotor",  reading from the brushes, I assume?

Look at my alternators below...not even near the gauge size you have, plus you have 2 strands!!

Regards

Ufopolitics

Offline kolbacict

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Re: Maybe possible idea for duplicating effect of Holcomb and others
« Reply #79 on: August 29, 2022, 09:14:46 PM »
And to me for some reason, no power is removed from the collector rings of the Lundel rotor .
When a three-phase voltage is applied to the stator.
And also the rotor does not want to rotate when selling direct current to the rotor. >:( :(

Offline citfta

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Re: Maybe possible idea for duplicating effect of Holcomb and others
« Reply #80 on: August 29, 2022, 09:20:12 PM »
And to me for some reason, no power is removed from the collector rings of the Lundel rotor .
When a three-phase voltage is applied to the stator.
And also the rotor does not want to rotate when selling direct current to the rotor. >:( :(


Do you have a scope so you can show us what signals you have on the 3 phase wires?

Offline kolbacict

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Re: Maybe possible idea for duplicating effect of Holcomb and others
« Reply #81 on: August 29, 2022, 09:57:23 PM »

Do you have a scope so you can show us what signals you have on the 3 phase wires?
There are about five volts on the Lundell rotor (brushes). Without load.
There is practically no current.
It does not depend on the position of the rotor.

Offline Jimboot

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Re: Maybe possible idea for duplicating effect of Holcomb and others
« Reply #82 on: August 30, 2022, 12:44:07 AM »
Hey Jim,

Man, that Alternator is a beast!!...on what vehicle that goes on?
I see that it has two strands of wire per phase...I figure you should have like 0.4-.0.3 Ohms resistance there!!

Reason why it blew one of your FETs...

I would try with just one strand on each phase.

I was checking out your FETs (IRF1405) and they have even higher spec's (capacity) than the IRF3205...So, when I look at your alternator image, then I  realized where the issue was.

You meant, that when you rotate the Stator (Magnetic Field) "it changed the waveform of the Rotor",  reading from the brushes, I assume?

Look at my alternators below...not even near the gauge size you have, plus you have 2 strands!!

Regards

Ufopolitics
Thanks UFO - the double strand surprised me. This is my first alternator tear down.  I can measure the 2ohm rotor directly on the coil connections. Brushes removed. So I could see at least transformer action before it blew.

Offline kolbacict

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Re: Maybe possible idea for duplicating effect of Holcomb and others
« Reply #83 on: September 01, 2022, 12:11:53 PM »
this little BLDC is working  by turkey technology.  :)
https://youtube.com/shorts/u-SSQF_LIIM?feature=share
speed and torque depend on the supply voltage.

Offline Ufopolitics

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Re: Maybe possible idea for duplicating effect of Holcomb and others
« Reply #84 on: September 01, 2022, 06:33:40 PM »
this little BLDC is working  by turkey technology.  :)
https://youtube.com/shorts/u-SSQF_LIIM?feature=share
speed and torque depend on the supply voltage.


That is wonderful Kolbacict!!
It tell us that this Turkish Tech ESC works on any level!!
Can you please, show which one is the common Y point out of the 4 contacts?
I believe it is the far left, looking at the contacts side...based on the resistance readings.
See uploaded image, where it has the + sign.


Thanks!!


Ufopolitics

Offline Ufopolitics

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Re: Maybe possible idea for duplicating effect of Holcomb and others
« Reply #85 on: September 01, 2022, 07:35:49 PM »
Hello All,

Here is how I view the way to make the Circuit Board for Zafer's ESC...
If you find any errors, please, let me know, and I will fix it right away...

Thanks

Ufopolitics

Offline kolbacict

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Re: Maybe possible idea for duplicating effect of Holcomb and others
« Reply #86 on: September 01, 2022, 07:54:06 PM »
Can you please, show which one is the common Y point out of the 4 contacts?
there are three wire in one pin soldering . That's how it's done for me, at least.
If not, the ohmmeter will show.

Offline citfta

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Re: Maybe possible idea for duplicating effect of Holcomb and others
« Reply #87 on: September 01, 2022, 11:22:28 PM »
Hi UFO,


I have gone over your PCB layout twice and I couldn't find any errors.  Looks great.  Thanks for your efforts.  I will be away from the forum for the next several days.  I may get a chance to check in once in a while.  Keep up the good work everyone.


Carroll

Offline Jimboot

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Re: Maybe possible idea for duplicating effect of Holcomb and others
« Reply #88 on: September 02, 2022, 02:23:18 PM »
Have a nice break Carroll. Thanks for
The circuit board ufo. My alternator as you realise even with the pairs in series will only be 1ohm. Fox knows what it’s out of. I can go and get another but I was wondering if i could have a 3phase rotor inside my 1kw gen stator? Im thinking the coils would need to be overlapping though rather than 3standalone poles.

Offline Ufopolitics

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Re: Maybe possible idea for duplicating effect of Holcomb and others
« Reply #89 on: September 02, 2022, 10:44:29 PM »
Hello All,


Ok, so here is the same board, just a few adjustments, except components are just "painted" on board to be installed.
In order to show all the circuit lines running under each one.
@Citfta,: Hey, have a nice get away!!
@Jim Boot, I am going to keep playing with the Alternator, I may rewind a new one my way...with thiner wire and more turns...As I found an old motor armature which fits perfectly inside, and I will also be rewinding that one too...to run it with this ESC.

Btw, I wanted to recommend a nice video below, where we can see (one of the ways) to wind a Three Phase Alternator Stator...it is interesting...
I find the field displacement to be pretty "high definition" if  we consider that each pole-phase, change-move every one teeth, and most generators have 36 tooth...So, it is about 1º per shifting phase, say, A,B & C.

WINDING AN ALTERNATOR STATOR (VERY DETAILED)

And so, I already have figured out, how to wind the inner Output Stator...for a higher output.

Have a nice weekend


Ufopolitics