Author Topic: axial generator with lamination core  (Read 114236 times)

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electrondady1

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Re: axial generator with lamination core
« Reply #429 on: April 19, 2021, 05:27:56 PM »
don't imagine a lack of comments to be a lack of interest. your machining and welding skills are very advanced and impressive . i am looking forward to the time your machine is finished and you can give us a video of it.

kitestrings

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Re: axial generator with lamination core
« Reply #430 on: April 19, 2021, 10:02:28 PM »
I agree.  It's not an approach that I have direct interest in, but I've enjoyed seeing your progress.  And, your ability to model, photograph and fabricate brings your ideas to life.  Impressive work.  I hope you're not dissuaded.  ~ks

SparWeb

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Re: axial generator with lamination core
« Reply #431 on: April 20, 2021, 12:21:24 AM »
If I chime in, it's to say much of the same thing.  Your work is very interesting to watch take shape. 
I am still looking forward to the day you can complete your assembly and make it work.

No one believes the theory except the one who developed it. Everyone believes the experiment except the one who ran it.
System spec: 135w BP multicrystalline panels, Xantrex C40, DIY 10ft (3m) diameter wind turbine, Tri-Star TS60, 800AH x 24V AGM Battery, Xantrex SW4024
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GreenTeam

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Re: axial generator with lamination core
« Reply #432 on: April 20, 2021, 01:34:39 AM »
My impression is that there is not so much interest on the forum in developing and improving active pitch control.
And I am a little concerned about that because it is incredibly important that the turbine is automaticly under control in all conditions.

How do you propose we build that functions?

MattM

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Re: axial generator with lamination core
« Reply #433 on: April 20, 2021, 06:59:37 AM »
My impression is that there is not so much interest on the forum in developing and improving active pitch control.
And I am a little concerned about that because it is incredibly important that the turbine is automaticly under control in all conditions.

How do you propose we build that functions?
Follow his thread for an answer to that question.

SparWeb

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Re: axial generator with lamination core
« Reply #434 on: April 20, 2021, 11:15:40 PM »
Referring to "active pitch control".  The newer members may not have come across this previous thread from Midwoud1:

https://www.fieldlines.com/index.php/topic,145925.0.html

We watched several developments of this pitch-control drive.  There are many interesting functions in the control system, too.
No one believes the theory except the one who developed it. Everyone believes the experiment except the one who ran it.
System spec: 135w BP multicrystalline panels, Xantrex C40, DIY 10ft (3m) diameter wind turbine, Tri-Star TS60, 800AH x 24V AGM Battery, Xantrex SW4024
www.sparweb.ca

mbouwer

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Re: axial generator with lamination core
« Reply #435 on: April 22, 2021, 01:43:37 PM »
Basically everything I show on the forum is meant to come to cooperation with windmill friends.

mbouwer

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Re: axial generator with lamination core
« Reply #436 on: April 23, 2021, 10:19:54 AM »
In my opinion, now only the real diehards succeed in building their own windmill and use the generated electricity.
It is a tough job, and when the kilowatts come in, you are no longer so inclined to modify and improve your workpiece.

kitestrings

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Re: axial generator with lamination core
« Reply #437 on: April 23, 2021, 05:33:54 PM »
I've never looked at it quite that way mbouwer.  Well, yes we're the diehards, but I've enjoyed learning, designing, building, refinement, re-refinement, and sharing experiences here.  It's the enjoyment of the journey (versus a destination) sort of thing.

I do find there are a lot of different back-grounds and approaches.  I follow many discussions, that I suspect I will not pursue, but follow none the less.  There's always something new to learn.

mbouwer

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Re: axial generator with lamination core
« Reply #438 on: April 27, 2021, 10:41:32 AM »
Given the many wind turbines around us, I think that others will also be more inspired to make small mills.
And that the possibility arises that I can cooperate with different disciplines.
« Last Edit: April 27, 2021, 02:57:12 PM by mbouwer »

mbouwer

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Re: axial generator with lamination core
« Reply #439 on: April 28, 2021, 10:17:56 AM »
An axial generator with 2 magnet rings and a stator.
That is what I prefer to continue with.
So I now put my radial generator study aside for a while.
« Last Edit: April 28, 2021, 10:35:07 AM by mbouwer »

SparWeb

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Re: axial generator with lamination core
« Reply #440 on: April 29, 2021, 12:26:28 AM »
Is your objective to never finish anything?

Aren't you the slightest bit interested in completing an assembly, to see it in operation?
No one believes the theory except the one who developed it. Everyone believes the experiment except the one who ran it.
System spec: 135w BP multicrystalline panels, Xantrex C40, DIY 10ft (3m) diameter wind turbine, Tri-Star TS60, 800AH x 24V AGM Battery, Xantrex SW4024
www.sparweb.ca

mbouwer

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Re: axial generator with lamination core
« Reply #441 on: April 29, 2021, 06:40:07 AM »


Large turbines are often radial, and for me this was a study how I could shape the mechanical components of a radial generator.

To me it seems best now  to continu with the mechanical components of axial.

Bruce S

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Re: axial generator with lamination core
« Reply #442 on: April 29, 2021, 10:20:40 AM »
mbower;
What size magnets are you going with?

Looks interesting

Cheers
Bruce S
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bigrockcandymountain

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Re: axial generator with lamination core
« Reply #443 on: April 29, 2021, 07:05:37 PM »
Did you ever test the electrical output of the axial you built? You were really close.  Just needed to twist some wires together if i remember correctly. 

I would love to see how the axial performs.

mbouwer

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Re: axial generator with lamination core
« Reply #444 on: April 30, 2021, 11:16:09 AM »
The test set-up of the 30 cm axial generator has been dismantled (without further testing)
The magnets may be useful in the new set-up.

mbouwer

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Re: axial generator with lamination core
« Reply #445 on: May 04, 2021, 08:26:52 AM »
2 ball bearings 68-40-15 as the new main bearing.


mbouwer

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Re: axial generator with lamination core
« Reply #446 on: May 04, 2021, 12:10:59 PM »
The main bearing composed. It is the base for a small axial generator.
Now first the stator bracket ring.

mbouwer

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Re: axial generator with lamination core
« Reply #447 on: May 05, 2021, 10:26:13 AM »
The base hollow ring of the stator bracket is composed of 1 mm sheet steel (important issue: weight and stiffness)
For the mounting flanges I used slightly thicker steel.
« Last Edit: May 05, 2021, 01:05:28 PM by mbouwer »

GreenTeam

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Re: axial generator with lamination core
« Reply #448 on: May 05, 2021, 06:03:37 PM »
(Attachment Link)

Large turbines are often radial, and for me this was a study how I could shape the mechanical components of a radial generator.

To me it seems best now  to continu with the mechanical components of axial.

I shall save you some headache right here and now lol
It appears that you have radials down quite nicely. Although, I would have went the segmented stator core route myself for a radial.
BUt, every single dissertation, thesis, any kind of accomplished study of axials clearly states that axials was actually the very first magnetic machine
devised around 1890s. But, real develpment has not begun until about the 1980s. Why is this? Due to the complexity of the topology. I myself have greatly considered
switching to radials because the magnet rotors would be soooo much easier to manage with accuracy. BTW, the real craze seems to be with multi layer overlapping concetrated stator coils
for the power density. And, with very long narrow trapazoid magnets. And, just having one coil not perfectly formed, means 15 percent power loss immediately.
Plus knocking due to the flux not cutting the coils at 180 degrees. Soldering the coils toghether seem to really scew up the accuracy. The only thing I can devise so far is a mould to pre pour them.
But, ive devised my own technique to pot them individually, and press them all to exact dimensions. But, you can easily double or tripple your number of coils by using overlapping coils. But, that means uptruned ends. Ive devised a method to perfectly bend them also.

I also agree, you are so close with the radials. But, looking at one of your earlier pics, it appears that I can see the fibers of your carpet? That is some massive fibers or a really small radial?
Hard to tell scale sometimes. Oh well, back to the drawing board I go lol.

SparWeb

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Re: axial generator with lamination core
« Reply #449 on: May 05, 2021, 09:50:10 PM »
GT,
It`s easy to read this thread, witness the process of fabrication, and jump to the conclusion that there is a goal.  Fabrication is the singular goal, here.  Fun to watch, but don`t get too worried about results.  It`s unlikely that we will arrive at the state where things are put into operation.  If we ever do, I`ll be happy to eat these words.  But in the meantime, I will just be eating popcorn.
No one believes the theory except the one who developed it. Everyone believes the experiment except the one who ran it.
System spec: 135w BP multicrystalline panels, Xantrex C40, DIY 10ft (3m) diameter wind turbine, Tri-Star TS60, 800AH x 24V AGM Battery, Xantrex SW4024
www.sparweb.ca

mbouwer

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Re: axial generator with lamination core
« Reply #450 on: May 06, 2021, 03:40:36 AM »
@Sparweb,

As you say, it is an endeavor to achieve a result in the longer term: A small windmill in the garden.
With low speed rotor blades and a small generator that delivers full power at low wind speed.

I myself do not have the knowledge to design the generator, but there the input from the forum can become important.

I now positioned the main bearing and the stator bracket with respect to the yaw bearing to make the suspension.


Mary B

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Re: axial generator with lamination core
« Reply #451 on: May 06, 2021, 12:10:46 PM »
You are an artist with metal... I can stick 2 pieces together with a welder and have it work... thankfully grinders hide ugly welds! What you do? Nope! I will never have that skill level!

kitestrings

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Re: axial generator with lamination core
« Reply #452 on: May 06, 2021, 08:28:41 PM »
Yes.  I say keep going mbou'r, once it is in the garden it will be immensely satisfying.

DamonHD

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Re: axial generator with lamination core
« Reply #453 on: May 07, 2021, 03:12:42 AM »
You are an artist with metal... I can stick 2 pieces together with a welder and have it work... thankfully grinders hide ugly welds! What you do? Nope! I will never have that skill level!

I second that "artist with metal"!

Rgds

Damon
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mbouwer

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Re: axial generator with lamination core
« Reply #454 on: May 08, 2021, 09:26:09 AM »
Based on dummy magnet rings and a dummy stator, we may be able to determine magnets and coils later on.


mbouwer

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Re: axial generator with lamination core
« Reply #455 on: May 09, 2021, 10:25:30 AM »
With a view to stiffness and low weight, the magnet rings ( external diameter 214 mm ) are composed of thin plate.
I want to apply 3 spokes.

mbouwer

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Re: axial generator with lamination core
« Reply #456 on: May 10, 2021, 02:23:30 PM »
This is the rear (dummy) magnet ring.
For the purpose of mounting the magnets I should use thicker material and turn a nice flat surface.

mbouwer

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Re: axial generator with lamination core
« Reply #457 on: May 12, 2021, 10:51:25 AM »
The rear magnet ring is mounted on the main bearing.

Only after the length of the laminations in the coils has been determined, the front magnet ring can be mounted.
But I now can continue with the stator bracket.
« Last Edit: May 12, 2021, 01:29:34 PM by mbouwer »

mbouwer

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Re: axial generator with lamination core
« Reply #458 on: May 13, 2021, 12:01:09 PM »
Prefabricating the lightweight stator bracket ring out of 1 mm sheet steel.
Diameter 24 cm

mbouwer

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Re: axial generator with lamination core
« Reply #459 on: May 16, 2021, 05:40:57 AM »
Stator suspension.
The mounting holes on the perimeter can not be drilled yet,
because the holes are related to the number of coils ( to be determined )
« Last Edit: May 16, 2021, 05:56:29 AM by mbouwer »

mbouwer

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Re: axial generator with lamination core
« Reply #460 on: May 17, 2021, 09:01:41 AM »
Frame for mounting the stator bracket and main bearing on the yaw bearing.
The gutter must form the connection with the nacelle hood.

mbouwer

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Re: axial generator with lamination core
« Reply #461 on: May 19, 2021, 06:03:51 AM »
Rear view after mounting the various parts on the mast.