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Barbosi
If your gonna talk the talk you should walk the walk...
Or Peeps won't take you seriously... and your Gazillion dollar jet set lifestyle [lennon that is]
Imagine that ?
I take Luc...living in a Van... Donating huge chunks of his life to help the less fortunate, much more seriously
than a guy in a park avenue penthouse strumming a guitar .
Here is the first test of a motor circuit designed by user name "verpies" which I've connected to my pulse motor to which I made a new drive coil for on Metglas core.
I also did a true motor efficient (electrical to mechanical) load test using a generator coil as load on the pulse motors magnet rotor.
This motor has three outputs:
1) The 100Ω resistor across the "generating coil"
2) "flyback" recovery cap and "draining pot"
3) Mechanical
The average power dissipated #1 is the easiest to calculate as P=VRMS2/R which calculates to: P = (7.12V)2/100Ω = 0.507W or 507mW.
The average "flyback" energy #2 captured in 1 cycle is the peak voltage across the recovery capacitor squared, times capacitance and divided by two or E=½CV2 , which calculates to: E=½*34.2μF*(10V)2 = ½ * 0.0000342F *100V2 = 0.00171J = 1.71mJ
But the motor runs at about 65Hz under load (pls verify), so we have 65 * 1.71mJ = 111.15mJ per second or 111.15mW.
The average "flyback" power is actually more than 111mW, because that "draining pot" keeps draining the 34.2μF cap even while this cap is being charged. (no periodic discharge circuit like Itsu's).
...and if the "draining pot" is wirewound and inductive, that it forms an LCR circuit with the 34.2μF cap creating an interesting problem...
The mechanical output #3 remains a mystery unless you are willing to calculate the bearing and windage losses ...or play with prony brakes.
Can we have the schematic of the power pulsing circuit ? with the power transistor, flyback diode and all...
Also, it would be nice if you'd care to scope the signals going to these multimeters by using AC channel coupling on your scope. Watch for a groundloop!
If you keep mentioning incremental input power in comparison to absolute output power, then a cerberus will descend from a high mountain and chew you out. From what height? ...about a mile, I guess.
P.S.
The current waveforms are not easily explainable on your scopeshots. I can smell a "back EMF" discussion brewing.
Allen asked a question at OU.com
A repost below for those that can't read it
Originally Posted by Allen Burgess View Post
@Gotoluc,
What's the COP?
Quote from Verpies:
This motor has three outputs:
1) The 100Ω resistor across the "generating coil"
2) "flyback" recovery cap and "draining pot"
3) Mechanical
The average power dissipated #1 is the easiest to calculate as P=VRMS2/R which calculates to: P = (7.12V)2/100Ω = 0.507W or 507mW.
The average "flyback" energy #2 captured in 1 cycle is the peak voltage across the recovery capacitor squared, times capacitance and divided by two or E=½CV2 , which calculates to: E=½*34.2μF*(10V)2 = ½ * 0.0000342F *100V2 = 0.00171J = 1.71mJ
But the motor runs at about 65Hz under load (pls verify), so we have 65 * 1.71mJ = 111.15mJ per second or 111.15mW.
The average "flyback" power is actually more than 111mW, because that "draining pot" keeps draining the 34.2μF cap even while this cap is being charged. (no periodic discharge circuit like Itsu's).
...and if the "draining pot" is wirewound and inductive, that it forms an LCR circuit with the 34.2μF cap creating an interesting problem...
The mechanical output #3 remains a mystery unless you are willing to calculate the bearing and windage losses ...or play with prony brakes.
Can we have the schematic of the power pulsing circuit ? with the power transistor, flyback diode and all...
Also, it would be nice if you'd care to scope the signals going to these multimeters by using AC channel coupling on your scope. Watch for a groundloop!
If you keep mentioning incremental input power in comparison to absolute output power, then a cerberus will descend from a high mountain and chew you out. From what height? ...about a mile, I guess.
P.S.
The current waveforms are not easily explainable on your scopeshots. I can smell a "back EMF" discussion brewing.
Well, I've done what printing needs be done for a bit and have the material laid out in a notebook. Next thing is to setup an external drive and download the videos for future reference.
I noticed some book titles when glancing at the stuff from OU. Will see about them as I get to them.
My basic machine will be made from a window motor variant that got concocted a few years back. The rotor is thermoplastic, foot or more in diameter, with 6 N52 neos (2"x4"x1/2") installed in NS configuration.
The shaft is 1" diameter mostly, but is reduced to 3/4 inch on one side. The shaft sticks out a foot on both sides. One side is keyed to keep the flywheel in place. I have two flywheels, one is 2x the other. Both are of aluminum.
I just got an 18" diameter, 1/2" thick cutting board from the folks at Freckleface, and 6 N52, 2" diameter Neos from Magnets4Less. Spoke to my buddy that teaches Machine Shop at a local technical school, and he's going to machine my parts up next week.
Again folks, let me encourage you to make use of the technical schools in your area. I've had great success getting things made for very little cost. Generally, these folks are glad to get into something different.
Musing a bit: Aluminum flywheel... could also be machined to accept magnets and turned into a rotor.
Now, didn't Ed say that iron wire had more magnets in it than copper? A local rebar seller has long lengths of soft iron (steel?) tie wire. Wonder if a person could find a soft varnish and paint some, then wind some, until they came up with a proper coil?
So, what I gotta do while all that machine work is coming together is unwind and untangle 9 strands at 300 feet of semi litzed window motor coil wire so as to be able to use it as field coils on the prime mover/generator, or whatever it ends up being.
Then, I can do the same thing with the #18 gauge stuff, ever how many strands that is. That'll make generator coils, most probably.
GlenWV,
Here is something I have been thinking about, since you mentioned steel wire.
What if you wound a whole bunch of steel wire as the "iron core" of your coil and then wrapped your motor coil or generator coil (or both) around it. The current induced in the "regular"coil would not only turn it into an electromagnet, but wouldn't it also induce voyage in that coil of steel wire that could be used? Haven't tried it, but I thought it might be interesting. Maybe threes some resonate CAN'T do both at the same time.
Dave
Dave,
funny you mentioned it, I was just playing with sending the pulse of a ss ssg through iron/copper cores looking for a free mag field, not too useful for me until I sent the cap dump through the iron core. works with off the shelf transformers too.
Glen,
I applaud your efforts and will help if I can.
Kril
Happy to see your still around. Let the party begin.
Aln
GlenWV, i dont get what are you heading to, reading your post... I would humbly advice you to write it for yourself clear I did that mistake, eager to start building something, excited of the posts in the already locked thread... It could spare you lots of time if you rethink it more. Probably first answer yourself honestly: What are you expecting?
Dave
I thought it was early There ..
Hope all goes well with your Mom !
What some don't realize that read these pages ,all options are on the table
[including Babcock ] Hunting a true anomaly with a dart might work for some.
But I would never throw stones at someone working thru it step by step
to be clear all manner of investigations are on the table,..And yet to come ,
and to be perfectly clear the international team of Verpies itsu and Gotoluc are passionate about this hunt and passionate about open source ,and there are few limits on what they can Build and thoroughly investigate.
some of the best folks on the planet IMO
and there are many others here and elsewhere ...
this is in no way an attempt to high jack this topic ,just to make folks aware of the goal ,.
if you can assist in this open source Goal ...please do !
the everyman for himself act might get pretty dicey down the .road
Generally, I don't like using Wiki site as a reference but in this case the information provided seems to be correct and makes me wonder if some of these concepts - custom pickup wiring could be applied in generator. https://en.wikipedia.org/wiki/Guitar..._modifications
V
PS One more thought which could apply to the air core coils. As for the cored ones, Uncle Nikola provided the answer already. Not sure IF it will work as I'm thinking and there is one way to know - try it unless. someone already did and could either confirm or dismiss it.
Last edited by blackchisel97; 01-28-2016, 07:20 PM.
Reason: added thought
'Get it all on record now - get the films - get the witnesses -because somewhere down the road of history some bastard will get up and say that this never happened'
GlenWV,
Here is something I have been thinking about, since you mentioned steel wire.
What if you wound a whole bunch of steel wire as the "iron core" of your coil and then wrapped your motor coil or generator coil (or both) around it. The current induced in the "regular"coil would not only turn it into an electromagnet, but wouldn't it also induce voyage in that coil of steel wire that could be used? Haven't tried it, but I thought it might be interesting. Maybe there's some reason it CAN'T do both at the same time.
Dave
Thanks Dave, I'll give it a try. Plus that gives me more things to think about trying.
Having two really different rotors on the same shaft should present many possibilities.
And, while rummaging around last weekend, I found a 'factory made' flywheel that will fit the little MYXXX, 24VDC motors.
I still have that setup on a bench waiting to be used, but will have to change the mounting to make space for the flywheel.
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