Author Topic: axial generator with lamination core  (Read 195393 times)

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mbouwer

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Re: axial generator with lamination core
« Reply #726 on: November 21, 2023, 08:52:46 AM »
People are sometimes really driven to build a savonius.


Bruce S

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Re: axial generator with lamination core
« Reply #727 on: November 21, 2023, 10:56:24 AM »
The "mill" in that picture is not a true Savonius as it is set up.
Typical "S" types have the "buckets" overlapping.

Not sure that the one pictured would even stay up in a decant wind.

However, I do agree, some will go to strange lengths :-)

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Bruce S
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mbouwer

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Re: axial generator with lamination core
« Reply #728 on: December 16, 2023, 07:23:26 AM »
What to think of Mingyang's new 22 MW concept?
Which transmission and generator will be used there?


mbouwer

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Re: axial generator with lamination core
« Reply #729 on: December 26, 2023, 04:52:04 AM »
What I read is that they use a medium speed gearbox and a permanent magnet generator.
Should we for diy also go in that direction with a small axial generator driven via an acceleration stage?

Mary B

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Re: axial generator with lamination core
« Reply #730 on: December 26, 2023, 11:07:54 AM »
What I read is that they use a medium speed gearbox and a permanent magnet generator.
Should we for diy also go in that direction with a small axial generator driven via an acceleration stage?

Would only be viable in larger machines... a 2 meter rotor would lose to much power in the gearing... have to balance tower needs(larger the rotor the more robust the tower needs to be!) against rotor size, and cost of both... sure step up to a 2 1/2 or 3 meter rotor, but then step up your tower design...

mbouwer

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Re: axial generator with lamination core
« Reply #731 on: December 27, 2023, 07:10:52 AM »
For example this small generator with a 2- stage gear chain drive mounted in front of it.


Bruce S

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Re: axial generator with lamination core
« Reply #732 on: December 27, 2023, 08:39:30 AM »
Very nice windings! What size is the wire?

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Bruce S
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mbouwer

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Re: axial generator with lamination core
« Reply #733 on: December 27, 2023, 02:43:22 PM »
@ Bruce,
It's one of those small axial generators that you can buy on the internet for a price for which you can't make it yourself for.

MattM

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Re: axial generator with lamination core
« Reply #734 on: December 27, 2023, 02:55:55 PM »
Looks like Aliexpress.  Scammers.

Bruce S

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Re: axial generator with lamination core
« Reply #735 on: December 27, 2023, 05:04:58 PM »
@mbower
IF you still have the link, would PM me with it please?
I'm curious about the wire as it looks like it's either very thin wire, or flat wire.
IF it is flat wire, then it is not worth the time due to the same issues using flat wire that even the guru's from years past on here have had.
IF it is very thin wire, then the voltage will be interesting.
I'm also betting the 2-stage is an external step not internal to this built unit.

@MattM  I've ordered from Ali--express for years now and have always gotten what I ordered.
However, I always read and copy the description of the stuff I'm ordering and expect an answer from the seller long before I place an order.


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Bruce S

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mbouwer

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Re: axial generator with lamination core
« Reply #736 on: December 28, 2023, 05:12:00 AM »
@Bruce,
Search for: 100 Watt DIY Micro Generator.

15784-0

Should the iron core and the backplate consist of laminations?

MattM

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Re: axial generator with lamination core
« Reply #737 on: December 28, 2023, 07:24:04 AM »
Why go this route when they sell more similar to Piggott for either 9 coils at $100 or 12 coils at $110?  These tall coils look too deep relative to the DIY versions.

mbouwer

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Re: axial generator with lamination core
« Reply #738 on: December 28, 2023, 08:18:07 AM »
These coils have the great advantage that they have an iron core.
But I don't know what material the core is made of.

MattM

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Re: axial generator with lamination core
« Reply #739 on: December 29, 2023, 09:02:21 AM »
Sure looks like steel rather than simple iron.  They do leave the steel core open in their set ups.  Eddy currents need 2 dimensions to form.  The open cores removes depth to the steel.  You may get some eddies forming vertically but those should have minimal impact on cogging.  Metal under a moving magnetic field will still heat.  Is the open steel core able to cool off relative to the copper is the real question.  They have different expansion rates and the steel will expand 10x faster than the copper.

mbouwer

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Re: axial generator with lamination core
« Reply #740 on: December 29, 2023, 10:03:41 AM »


Isn't this just an axial version just like a radial version where there is a stator with teeth built up from stator sheet laminations.
The iron of the stator and the cores of the coils must be able to change polarity very quickly and must not become permanently magnetic.

MattM

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Re: axial generator with lamination core
« Reply #741 on: December 29, 2023, 06:57:49 PM »
It would be interesting to see if that was the case by mounting freely rotating magnets under each coil.  If a north magnet was above the coil then the magnet under the coil should rotate its south pole towards the coil.  But I believe that all the magnets interact simultaneously.  The magnetic fields and coils do not match in numbers, so in reality only one coil at a time should truly be under polarization.  The others are all in a state of transition.

mbouwer

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Re: axial generator with lamination core
« Reply #742 on: February 14, 2024, 03:21:26 PM »
Small axial generator to build a working model of a windmill.


mbouwer

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Re: axial generator with lamination core
« Reply #743 on: February 21, 2024, 08:06:21 AM »


9 coils / 12 magnets.
According to the Bavaria Winding Diagram Table, 9 coils / 10 magnets would be a better combination.

mbouwer

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Re: axial generator with lamination core
« Reply #744 on: May 07, 2024, 02:05:48 PM »


This mini wind generator with planetary gearbox is a great starting point for a model of a Nordex windturbine.

mbouwer

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Re: axial generator with lamination core
« Reply #745 on: May 08, 2024, 04:18:31 AM »


Starting with the top part of the mast as a tripod.

mbouwer

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Re: axial generator with lamination core
« Reply #746 on: May 09, 2024, 06:13:38 AM »


The lattice mast is covered with polyester and has 2 sliding bearing rings in the top.
The pivot of the yaw-bearing fits into these rings.

mbouwer

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Re: axial generator with lamination core
« Reply #747 on: May 10, 2024, 03:51:08 AM »


Base of the nacelle with the main bearing housing is mounted on the yaw bearing.
I now need to make the main axis.

brandnewb

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Re: axial generator with lamination core
« Reply #748 on: May 10, 2024, 02:46:45 PM »
Yes brother,

I am thrilled that you also just keep informing us over on this site.

Look, I hold you int he highest of esteem of course. And thus please keep hanging out here.

Yet do know that I read between the lines.

Anyway back on track. I would still like you on board on how to quantify this power generation aspect of our builds.

I sure am still failing at it. I just so hope that a new insight might just get the show on the road.

Kind regards

mbouwer

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Re: axial generator with lamination core
« Reply #749 on: May 11, 2024, 03:37:20 AM »


Assembling the main shaft with slotted holes for blade adjustment.

mbouwer

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Re: axial generator with lamination core
« Reply #750 on: May 12, 2024, 03:02:00 AM »


The main shaft directly drives the planetary gearbox.

mbouwer

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Re: axial generator with lamination core
« Reply #751 on: May 14, 2024, 04:15:15 AM »
To shape the spinner with the blade suspension I want to continue with parts I made earlier.


mbouwer

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Re: axial generator with lamination core
« Reply #752 on: May 15, 2024, 03:34:40 AM »
Main axle with blade suspension.
1 mm sheet steel with a first layer of polyester.




mbouwer

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Re: axial generator with lamination core
« Reply #753 on: May 16, 2024, 03:47:34 AM »


Now 3 new blades like this one. A foam core covered with polyester.

MattM

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Re: axial generator with lamination core
« Reply #754 on: May 16, 2024, 06:28:41 AM »
You must be getting close to assembly.

mbouwer

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Re: axial generator with lamination core
« Reply #755 on: May 17, 2024, 04:32:20 AM »


Blades 2 meters diameter. Like the Nordex they have to run about 20 revolutions/min.
I now need a blade adjustment mechanism.

brandnewb

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Re: axial generator with lamination core
« Reply #756 on: May 17, 2024, 07:25:32 AM »
OHH WOW!!

if it is 2m diam then my municipality (or is it province?) can not not allow for it!! based on diam alone.

Is it the same where you are operating from?

Anyway I fear that with a 2m diam, things will pretty much be rendered useless.

I soo hope I am mistaken as that will open a whole new window of opportunity once I get my skills together as to make no noticeable sound and be sure things do not become lawn darts. Especially at the RPM I think one needs to be able to extract some useful power out of the wind whilst not potentially killing anything in a 40 meter radius when s*&t hit the fan.

I am soo open for polite discussion. I mean now we know my fears.

{1}
I get 0.05195Kw of available wind power at 3m/s when using a 2m diam HAWT. according to
https://www.omnicalculator.com/ecology/wind-turbine
that is.
at 5m/s that would be 0.24053KW

I am not sure if this all makes sense so please let us try and figure this out together ok?
{/1}
« Last Edit: May 17, 2024, 07:35:42 AM by brandnewb »

mbouwer

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Re: axial generator with lamination core
« Reply #757 on: May 19, 2024, 04:51:10 AM »
@ Brandnewb,

Our government is increasingly positive about wind energy.

mbouwer

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Re: axial generator with lamination core
« Reply #758 on: May 19, 2024, 04:53:26 AM »


Parts of the blade adjustment.