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Author Topic: Rotating Magnetic Field's and Inductors.  (Read 181573 times)

verpies

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Re: Rotating Magnetic Field's and Inductors.
« Reply #405 on: January 06, 2016, 10:54:05 PM »
It would be interesting.
For starters these experiments should be repeated with the Finemet cores.

tinman

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Re: Rotating Magnetic Field's and Inductors.
« Reply #406 on: January 07, 2016, 12:06:30 AM »


Capiche?

Quote
Brad,

That's an extremely poor reason not to accept my challenge, and will be perceived as a cop-out.

So be it. You didn't have much of a chance anyway. ;)

Carry on believing you have something extraordinary with your ssg rotor setup if you wish, but proof will be in the pudding, whether you can make anything extraordinary of it or not. I hope you do, but I'm quite certain that you're no further ahead when compared to good old fashioned proper engineering design.

Really Poynt ?
I would have expected better from you.
It is not me that is copping out here. You tried to replicate the effect from my DUT-you couldnt,and came up with the excuse that it needs more tweaking,but you dont have the time ::)

I have accepted your next challenge on the grounds that you complete your first challenge--nothing more than that.
Quote: Carry on believing you have something extraordinary with your ssg rotor setup if you wish, but proof will be in the pudding,

Well Poynt,we are awaiting for you to provide that proof,and show us that your simulation of my DUT can show what my DUT show's. Saying that you dont have the time to finish tweaking it,but to then propose another challenge(having time for another challenge) seems a bit Irish to me?.

Quote
Well hold on a minute there Luc, Brad is the one making claims that he has some extraordinary magic trick that is giving him better efficiency over anything else, so it is him that is putting those conditions on himself. The whole point of the challenge was to put good old engineering design up against his magic ssg scheme.

These claims i have made(an increase in inductance in the coil),are the very same one's that you !not so long ago! deemed may be possible. But here you are calling it a magic trick :o .It is also true that you set out to try and disprove my theory with what you call every day physics-nothing special going on there,and you were unable to achieve the results with your simulated version that i have with my DUT. If they are just everyday events taking place,why are you having so much trouble simulating the result's?. The reason you cannot,is because your simulator is based around known physics and parameters. Do you know why your simulated version cannot return the results that you had hoped it would Poynt-->because they still dont know what the magnetic force is,so they cannot program your sim to simulate that which they dont know. The proof of this is in your result's.

It would seem to me that it is you that took a cop-out with your first attempt to disprove me,when your simulated version returned a negative result.


Brad.

tinman

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Re: Rotating Magnetic Field's and Inductors.
« Reply #407 on: January 07, 2016, 12:10:58 AM »
LOL,

It is ironic actually; I am often criticized for offering my simulations as a means to analyze a circuit and for rarely building anything, but here we have the exact opposite! Brad wants me to complete my simulation before he will accept a challenge where I would be building an actual device.

Too damn funny.  ;D

Now is your big chance at showing every one here that your sim can show real world/real device result's. I am often criticized for not seeing things through to the end(hey Poynt  ;) ),so lets not have others place you in the same boat as me. I am taking this to the end,so how about you do the same  :)

Like i said before--if you have the time to build an actual device,why dont you have the time to finish of your simulated version first,and show every one here that your sim will indeed show real world result's.


Brad

tinman

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Re: Rotating Magnetic Field's and Inductors.
« Reply #408 on: January 07, 2016, 12:27:11 AM »
I'm just baffled that anybody can believe that a pulsing coil and a few magnets spinning on a rotor can be doing something special.  However, we have been there dozens of times in the past.

It's fun to try to figure out exactly what is going on as an interesting challenge.  I think it was on the other thread that I took some measurements that Woopy made on one of his builds and I crunched the hell out of his measurements and extracted lots of information and pretty much reverse-engineered the energy dynamics of his entire setup.  All that I got was stony silence.



In the spirit of the "understanding" challenge I will post some sample timing diagrams on another thread.  I don't expect that Brad will ever do a timing diagram, but perhaps seeing some examples will inspire somebody else to make one for their next pulse motor build.  In fact, if there is ever another pulse motor build off, supplying a timing diagram for your motor should be a requirement for entry into the competition.

http://overunity.com/16317/the-beauty-of-timing-diagrams/msg470448/#msg470448

Quote
I notice that Brad takes exception if somebody that is a so-called "big gun" changes their analysis or adapts their analysis over time because of something that they did not think of before or because some new information becomes available.  Horror of horrors, that's just not permitted!

What i take exception to is being told i dont know what im talking about,and that i have nothing out of the ordinary taking place within my DUT. Then to have some one !!try!! and simulate my DUT,but are unable to achieve the same result's,and then say that they could achieve the result's if they tweak the sim a bit. When asked to do that,they then dont have the time,but in the next breath,they offer another challenge,where they now have the time to build an actual device,and post a video of the test and result's.

The next exception i take(after being told that what i believe is going on with my DUT is incorrect),is when a big gun decides that it may be possible that what i believe was going on could actually be what is going on-->and then credit is given to them for making this wonderful discovery. It's happened before,and it will happen again.

All i ask is for Poynt to finish his simulate version of my DUT,and repeat the result's of my DUT,as this is what he set out to do. I feel the reason that Poynt is trying his best to avoid completing his simulated version,and delivering the final result's,is because he cannot simulate the results i have with my DUT. To say he dosnt have the time !!IS!! a cop-out,as he seems to have the time for another challenge.

It's very easy to complete.
1-He either can and has got his sim to replicate the result's of my DUT-or
2-He says he cannot get his sim to replicate the result's of my DUT.
Why is he avoiding this?.

Maybe there is some one else out there that is well versed in simulations that could give it a go,and post there results from there simulated version?.


Brad

tinman

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Re: Rotating Magnetic Field's and Inductors.
« Reply #409 on: January 07, 2016, 12:33:17 AM »
Why and what will that do for me?

According to Faraday's Law of Induction, if you get a waveform like that all above zero with an open coil that is not powered externally, then it means that the magnetic flux penetrating this coil is always increasing up and up and up....

poynt99

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Re: Rotating Magnetic Field's and Inductors.
« Reply #410 on: January 07, 2016, 01:57:14 AM »
Well Poynt,we are awaiting for you to provide that proof,and show us that your simulation of my DUT can show what my DUT show's. Saying that you dont have the time to finish tweaking it,but to then propose another challenge(having time for another challenge) seems a bit Irish to me?.
I think you are the only one waiting for something to happen, that I have already said 2 or three times, is not going to happen.  ::)

Listen up Mr., as long as I retain free will, neither you nor anyone else is going to dictate what I do with my free time! >:( I don't have to justify bugger all to you, and its your problem if you can't see the sensibility in my decision to build rather than simulate. You should be bloody well more than satisfied that I am even willing to do that!

Quote
These claims i have made(an increase in inductance in the coil),are the very same one's that you !not so long ago! deemed may be possible. But here you are calling it a magic trick :o .
That is your over all claim of this thread? Is that so? No, You're moving the goal posts again.

I posted a quick video showing how having a rotor with alternating magnetic field passing a pulsed inductor can improve the efficiency of that inductor as far as the inductive kickback output go's.
My challenge is to that statement, not to whether the inductance is increasing or not.

Anyway Brad, I could have a field day with your recent posts, but alas I choose to do other things with my time, because it is not worth it. My past dealings with Rosemary Ainslie taught me a great deal about dealing with "difficult" people and when one's time is worth investing and when it is not, so I will remain reserved.

You would be wise to stop tirading about and instead do something extraordinarily productive with that magic ssg rotor of yours. But I wouldn't want to tell you what you should do with your time now, would I?

Magluvin

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Re: Rotating Magnetic Field's and Inductors.
« Reply #411 on: January 07, 2016, 02:29:41 AM »
Ok. It seems we have some work to do. 

I just inserted a ferrite bead in my 1.65mh coil. It went up to 2.17mh. Then I added a 3/4 by 1/8 disk neo magnet, tried both ways. Got 2.15mh.

From what I had understood in the past before reading the power supply book was that adding a magnet to a coil would lower the inductance, from what were were discussing then was that the magnet sorta stiffens things up a bit.

But now I am at square 1.   Hopscotch anyone?

So when I get home I will reread the text to see if what I reread already was accurate.

Thinking about it before I posted this, there may be an issue with reading inductance of the coil being it is biased one way and not the other with the magnet. So the question for me is it possible that adding the magnet screws with the way the inductance meter reads the coil?.  Like I can understand that if the meter is putting and ac sig to the coil and sampling what it samples that the magnet biasing the coil might have an odd effect if the meter wants to see ac. Dunno yet.

Considering that the magnet instilled inductors the book was talking about were only for dc pulse efforts, then maybe we cannot look at the coil as being the same with magnetic biasing when were talk about inductance in general..     Like say if without the magnet on the coil being used in a dc-dc converter, dc pulsed, that the coil/core for the design has only so much in it before saturation, but when adding the magnet being biased against the coil field and our level of saturation becomes possibly near twice the level than without the magnet, could that increase be labeled as an increase in inductance? ??? ??? Larger core=higher inductance and larger core= higher saturation point. Being it is a dc pulsed inductor and not for ac(as in + and - from 0v), because if we reverse the magnet in that same situation, saturation levels would be down as compared to no magnet added because the coil would be adding to the mag field causing premature saturation, as the magnet has the core prefilled in a sense.  So maybe we cannot assume the henry meters are showing the real deal when looking at magnetically biased core/coils. What got me thinking these things with the meters is that fact that it didnt matter what polarity the magnet was, the meter read the same, so we have to assume the meter is not dc pulsing the coil the get samples, it is using ac.

So in our case here, we are using dc pulsing. So, can we consider if the magnetically biased core increases the level of saturation of the core, would that also be considered an increase of inductance of the coil?? In a dc pulsed situation of course.

Just did these things after work here at my shop. Put the motor together last night and messed around a bit. Cant use my adjustable supply to run it as the grounds of the scope and supply cause big issues. Ground isolation plug adapters will work?  Read in the past of someone cutting of the gnd post of the ac plug. Not doin that, yet.

Also had some settings on the scope messed up where my ac sig of the coil alone with rotor spinning was big on the plus side and little on the - side.  Still getting used to this thing. Finding on a new project just to hit default settings. Lots of menus to miss something maladjusted. Can make ya loony tunes. :o ;)

Mags

gotoluc

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Re: Rotating Magnetic Field's and Inductors.
« Reply #412 on: January 07, 2016, 04:40:20 AM »
I just inserted a ferrite bead in my 1.65mh coil. It went up to 2.17mh. Then I added a 3/4 by 1/8 disk neo magnet, tried both ways. Got 2.15mh.

Mags

Hey Mags, why are you using  Ferrite to test?... it's the worse core you can use to test this.
Use steel laminations, at least you won't have a drop in Inductance or next to none.

Again, the only core material I have ever seen increase Inductance by a magnet (without need of movement) is Finemet.
I suggest you get some toroids and test it out like I did in my demo video.

You can buy them here: http://www.elnamagnetics.com/catalogs 
If you have some kind of business you may be able to request a free sample.

I've attached some PDF's

Luc

gotoluc

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Re: Rotating Magnetic Field's and Inductors.
« Reply #413 on: January 07, 2016, 04:42:44 AM »
Error

gotoluc

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Re: Rotating Magnetic Field's and Inductors.
« Reply #414 on: January 07, 2016, 05:03:01 AM »
It would be interesting.
For starters these experiments should be repeated with the Finemet cores.

Thanks verpies, but that document is way too long for me.
If you want to go through it and chose the one you think is the most interesting and post a diagram of the test device, I'll see what I can do.

Thank for sharing

Luc

MileHigh

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Re: Rotating Magnetic Field's and Inductors.
« Reply #415 on: January 07, 2016, 05:36:38 AM »
Inductance meters are arguably like car "idiot lights" or the newer term "numbers in boxes."

You can watch the inductance in action on your scope, experiment with both current/magnet directions, and as a bonus find the saturation point for the core.

From a YouTube search:

https://www.youtube.com/watch?v=01Ebd6eR7Lw

https://www.youtube.com/watch?v=74fz9iwZ_sM

https://www.youtube.com/watch?v=GF4AbbBGa5M

https://www.youtube.com/watch?v=RhS8m38ef0Y

Honestly any serious experimenter needs to be able to measure capacitance and inductance with his scope and a few support components.

MileHigh

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Re: Rotating Magnetic Field's and Inductors.
« Reply #416 on: January 07, 2016, 06:28:06 AM »
Well, I looked at those four clips after the fact and I didn't like any of them because they are all based on frequency measurements.

I wanted a clip that measures the L/R time constant Tau.  That way you can see all of the action in real time.  You can also lower the resistance more and more so that the final current is such that the core is fully saturated.  So you can determine the saturation current for a given coil + core material and hopefully observe the anomaly in the waveform as you break through the saturation level.

I couldn't find a clip that demonstrated that so I marked up a screen cap.  With the attached setup you can look at the rising current waveform in real time and play with your magnets and such.  Just measure the Tau and take it from there.

As far as I am concerned this pulse-based system is a "truer" inductance measurement because you are looking at the actual exponential current waveform.   You have the option of measuring the inductance at different final current values to "feel out" how the core material is responding to different final B field intensities.

This is the real Spice.

I attached a second image with the math.

MileHigh

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Re: Rotating Magnetic Field's and Inductors.
« Reply #417 on: January 07, 2016, 06:49:18 AM »
After that very helpful posting if I see one more jackass try to tell me what a horrible person I am, then they can shut their mouths and kiss my ass.

tinman

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Re: Rotating Magnetic Field's and Inductors.
« Reply #418 on: January 07, 2016, 10:49:36 AM »
 author=poynt99 link=topic=16261.msg470474#msg470474 date=1452128234]
 





Quote
I think you are the only one waiting for something to happen, that I have already said 2 or three times, is not going to happen.  ::)

Interesting. I have never seen you give up so easily with your sim replication's.

Quote
Listen up Mr., as long as I retain free will, neither you nor anyone else is going to dictate what I do with my free time! >:( I don't have to justify bugger all to you, and its your problem if you can't see the sensibility in my decision to build rather than simulate. You should be bloody well more than satisfied that I am even willing to do that!

The only reason your willing to actually build a device,is the need to beat me,and prove me wrong.
You failed at your first attempt,and now are seeking a second go at it,and as Luc pointed out-with the bases loaded in your favor. But non the less,i accepted your challenge on the condition that you accept my request that you finish what you started with your sim--that was suppose to show nothing out of the ordinary was taking place with my(and Luc's) DUT's. So !!Mr!!,i am not satisfied that you are unwilling to complete and finalize your sim version of my DUT-that you took upon your self to do.

Quote
That is your over all claim of this thread? Is that so? No, You're moving the goal posts again.

No,it's not. You only have to follow the thread to see that as i experimented more and more,what i thought may be what was happening,turned out to make no sense.
Example- post 238 Quote: If the magnets were increasing the effective inductance of the coil,why dose this increase not happen when the magnet(either pole) on the rotor is stationary in front of the coil?.
I think the rotor magnets are inducing an EMF across the coil,and it is this EMF that is the cause of the reduce P/in,as the battery now dose not have to supply that bit of energy to create that EMF that already exist.


So you see Poynt,as i kept on moving along with experiments,i also worked on making what i thought make sense. As you can see,i was thinking along the same lines as you--no increase in inductance was taking place,but the effect was to do more with the EMF being produced across the coil by the moving magnets.

Quote
My challenge is to that statement, not to whether the inductance is increasing or not.

Really?. Lets have a look at your post-post 253-Quote: An observation from the two scope shots:
It appears that the reduced current during the ON time is a result of the negative-induced voltage in series with the battery voltage. I presume Pin goes down with the rotor installed.
So is there a problem or something that apparently hasn't been explained?

Yes,there is a problem !or something! that was yet to be explained.

Here was my next thought as to what may be taking place to reduce the I/in-P/in,after i had discounted the produced EMF across the coil by the external magnetic fields.
Post 262- Quote: This is exactly what i said some pages back,so lets run with this for a bit,and think about what is happening during each cycle. We do know which comes first(the chicken or the egg) in this case,and that is the induced flux into the core from the PM's. We know this because we have alternating fields on the rotor. The coils produced field at the rotor end is north,so the other end of the coil will be of course a south field(we will stick to N&S as it makes it easy). We know that the magnetic domains within the core will align opposite to those in the PM,and so will be aligned the same when the coil has a current flowing through it. So the induced flux in the core from the PM's is now present before the coil switches on. This in turn lowers the P/in needed to raise the flux volume in that core and it's surroundings to the level we had without the rotor-->this we know,as the P/out dose not change,which tells us the field in and around the inductor was the same in both cases. The extra waste heat dissipated by the coil when the rotor is not in play,is due of course to more current flowing through the coil. The extra current flow is due to the fact that it now has to induce the flux into the core as well,where as with the rotor,the flux is already induced !mostly!,and the domains are !mostly! already aligned within the core material. So from this we know work is needed to induce the flux into the core,and align the magnetic domains within that core-->and we also know that this work being done came from the magnets when the rotor is in play. So lets use some example numbers here-that being the power required to spin the rotor,and the reduced power that the magnets on the rotor cause.

Post 269 in regards to your post 253-Quote: My explanation was regarding how or why Pin decreases when the rotor is used.It is an explanation if you put a little thought into it. I'm done spoon feeding.

So as we can see,you had made up your mind that it was this reverse voltage across the coil that the magnets on the rotor produced,that was the cause for the reduction in P/in and increase in P/out.

Post 270-my post after gaining further information from the tests i had been carrying out,and when a true understanding started to make sense of what was happening with my DUT.
Quote: The reduced P/in with the rotor is more to do with the induced flux into the inductors core,and not the induced negative voltage.

Now i will just requote what you wrote above=
Quote:My challenge is to that statement, not to whether the inductance is increasing or not.
Your post-272-Quote: That does not make sense. In fact it is opposite to what happens. Are you thinking that the inductance, and hence impedance of the coil increases when the magnet is flying by? No, it would decrease.

Your post 273- Quote: What are your thoughts Brad on trying a solid state version to achieve the same effect?
I was all for this solid state version being done to see the !!same!! effects.But we will get back to that later on in this post.

My reply to your post 272--post 274
Quote: That is actually incorrect.
The inductance rises when there is a changing flux value in the core of the inductor/ over time. Only when the flux value is constant,is there a reduction in the inductance value. As the magnetic flux is never a constant value in the core of the inductor when the rotor is in play,then the inductance value of the inductor is indeed higher than it would be without the rotor.

Your post-276 Quote: Do you have data or a technical reference to back that up? It goes against the physics of how cores work. If the core's magnetic domains are anywhere other than their neutral position (i.e. non-polarized) at the instant the coil fires, then the coil's inductance will be reduced, regardless if the domains were in rotation or were static at the time. The core is partially or fully polarized in either case.

Your post 277-Quote: I have one SS version to offer here, and you are close. Mine uses another coil yes, but it doesn't require another power source.The effect has been verified AFAIAC, and confirms my explanation offered earlier. My Conclusion? Nothing extraordinary going on here.

One of your comments on post 279 Quote: Take it as it is, there is no miracle action at hand here, just good old fashioned electrical theory. We all went down a similar road years back with Luc's Capacitor energy transfer experiments, which I also did a big paper on.

Your post on post 285-Quote: I honestly am beginning to think that one reason folks seem to learn too little around here, is because they are being spoon fed the answers all the time; yes by guys like me, verpies, MH, TK et al. Check out citfta's link, or google "inductance" and "frequency" together. Here is another link. Perhaps you'll learn more by digging some answers up yourself.

Which is what i have been doing with the tests i have been carrying out with my DUT--not from some books or laws !!theories!.

Your post 326 Quote: As I said Brad, the simulation could use some fine tuning to not only increase the effect, but maintain or increase the flyback power as well. I just don't have the will nor desire to do so. But I am confident it can be done.

I am confident that OU machines can be made,but that is neither excepted or proof. Your sim results did not simulate the results from my DUT,as you made claim to above-Quote: The effect has been verified AFAIAC, and confirms my explanation offered earlier

No-no it has not been verified at all,and that is a false statement you have made.

Your post 360-Quote: I gave you one method to achieve the same effect without using magnets. If you are interested in seeing it done without them, why don't you build it?

No-no you did not give me one method to achieve the same effect,as you did !NOT! achieve the same effect as my DUT with your sim. Why dont i build it you ask-->why dont you finish your sim project,and show that the same effect can be achieved without actual permanent magnets in motion?.

After reading all that,i will now re-quote your statement above
Quote:My challenge is to that statement, not to whether the inductance is increasing or not

Well that is not what you have posted throughout this thread-and it's all there to read as i posted above.

After all that,here is the kicker
Your post-392 Quote: There is one way I can think of that might increase the inductance of a cored inductor, but only momentarily during the ON time, which of course is what we are dealing with here.

After all your dismissive posts about an increase in inductance,your posts both on this thread and Luc's as to how what we think go's against some law's of inductors,and we have nothing out of the ordinary happening-->you post the above statement ::),a statement that resembles my exact setup--my DUT-->which of course is what we are dealing with here

After all you have posted throughout this thread,you then have the balls to post this-
Quote: Anyway Brad, I could have a field day with your recent posts, but alas I choose to do other things with my time, because it is not worth it. My past dealings with Rosemary Ainslie taught me a great deal about dealing with "difficult" people and when one's time is worth investing and when it is not, so I will remain reserved.


Are you Fn serious Poynt  :o
And this-
Quote: You would be wise to stop tirading about and instead do something extraordinarily productive with that magic ssg rotor of yours. But I wouldn't want to tell you what you should do with your time now, would I?

Never did i think you would ever turn out to be some one like this Poynt.
Most of your post here on this thread(and Luc's) dismissed any possibility that the inductance could be increasing,and that being the cause of the increase in efficiency--even to go as far as simulating the effect--which you failed to do.

I have been learning-understanding as i go-reasoning with what my tests were showing me,and making sense of them. You on the other hand just went straight for the !!nothing out of the ordinary!! happening here,and decided it was the induced reverse voltage that was causing the effect.
You then have the ordasity to say to me--> You would be wise to stop tirading about and instead do something extraordinarily productive.

So go ahead Poynt--have a field day with my post on this thread.
But before you have a go at me like you have,take the time to go and read the whole thread,and remember the things you have said throughout that thread.


Brad.

verpies

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Re: Rotating Magnetic Field's and Inductors.
« Reply #419 on: January 07, 2016, 11:40:39 AM »
, so we have to assume the meter is not DC pulsing the coil the get samples, it is using AC.
This difference comes down to the absolute permeability of the core vs. the differential permeability of the core, respectively.
Inductance is proportional to one of these permeabilities.  Can you guess to which one?

Hint: Inductance is the ratio of Flux linkage to Current.