Author Topic: Active Pitchcontrol  (Read 331798 times)

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hiker

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Re: Active Pitchcontrol
« Reply #594 on: March 29, 2017, 12:14:43 AM »
What phase number are you looking at ?  Low speed alt equals high number of  winds per coil..but then again a high number of coils could equal lower turns....looks like a great project...
WILD in ALASKA

MattM

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Re: Active Pitchcontrol
« Reply #595 on: March 29, 2017, 07:32:46 AM »
If you could get another set of magnets that match the flat side dimensions but have minimal height then you could simply add them as caps, right?  You have to seal the magnets regardless.

mbouwer

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Re: Active Pitchcontrol
« Reply #596 on: March 29, 2017, 11:09:09 AM »
There are many things about the generator I would like to discuss as for example the number and shape of the magnets.
On the circumference of the generator-ring I could mount 160 magnets of 4 mm wide.

In the meantime I can make the other components like the blade suspension.

mbouwer

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Re: Active Pitchcontrol
« Reply #597 on: March 30, 2017, 05:15:36 AM »
Blade suspension mounted (+ 4 magnets  20 x 10 x 2 )
Now the blade yaw bearings.

CraigM

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Re: Active Pitchcontrol
« Reply #598 on: March 30, 2017, 09:24:36 AM »
mbouwer,

Are these 3D printed components or am I looking at modeled drawings?
Brain engaged in Absorption Charge Mode... please wait, this may take awhile.

mbouwer

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Re: Active Pitchcontrol
« Reply #599 on: March 30, 2017, 02:37:31 PM »
CraigM,

The professional windturbines around inspire me.   http://www.enercon.de/en/products/ep-4/e-126-ep4/

So I would like to have a model in my garden and use the generated energy.

Always seeking windmillfriends for cooperation.

Bruce S

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Re: Active Pitchcontrol
« Reply #600 on: March 30, 2017, 02:48:04 PM »
CraigM;
I'm pretty certain those are actual metal parts he's using.
The magnet ring is metal with holes ( I think) to receive countersink stainless steel screws.

Mbouwer ;
Is that assembly ALL metal? or are you 3-D printing parts too?

Thanks
Bruce S
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mbouwer

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Re: Active Pitchcontrol
« Reply #601 on: March 30, 2017, 04:25:17 PM »
Bruce S,

The assembly is ALL metal.
But is'nt welding a bit like 3-D printing?

Bruce S

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Re: Active Pitchcontrol
« Reply #602 on: March 30, 2017, 04:52:39 PM »
Bruce S,

The assembly is ALL metal.
But is'nt welding a bit like 3-D printing?

Sorta , BUT way cooler in my book  ;D.
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Mary B

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Re: Active Pitchcontrol
« Reply #603 on: March 30, 2017, 05:57:45 PM »
That is some sweet machining! WOW!

CraigM

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Re: Active Pitchcontrol
« Reply #604 on: March 30, 2017, 08:42:29 PM »
mbouwer,

How did you make all of these components? The hub, rotor and other pieces don't appear to be repurposed from something else but look to be made from castings. Are these just bits of other objects that you're fabricating and welding together?

Very nice fabrication work!
Brain engaged in Absorption Charge Mode... please wait, this may take awhile.

MattM

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Re: Active Pitchcontrol
« Reply #605 on: March 30, 2017, 09:32:16 PM »
It looks like poured metal.  Maybe it's steel.  You could more easily pour aluminum.  Hopefully it's not cheap scraps thrown together.  We used to call scraps mixed together pot metal.

mbouwer

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Re: Active Pitchcontrol
« Reply #606 on: March 31, 2017, 04:32:23 AM »
It is steel.The welding is poured metal of course.

Bruce S

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Re: Active Pitchcontrol
« Reply #607 on: March 31, 2017, 12:13:35 PM »
mbouwer;
Is that 6mm steel? IF those are welds , those are an order of magnitude better than mine.
IF the welds are even molten steel poured onto steel rings,,, that is still awesome workmanship .

Bruce S
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mbouwer

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Re: Active Pitchcontrol
« Reply #608 on: March 31, 2017, 01:13:00 PM »
Bruce S,

The three rings for the blade suspension are made of 10 mm square steel.
After welding, grinding and a bit of paint you also get this result.

Now busy with the yaw bearing for the blades. I would like them to be light and solid and easy to make.
I thought of integrating them them in the blade.

mbouwer

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Re: Active Pitchcontrol
« Reply #609 on: April 01, 2017, 07:56:01 AM »
My intention is to support the blade on two places which have distance from each other.
The slide bearing and the threaded rod.
« Last Edit: April 01, 2017, 08:06:10 AM by mbouwer »

kitestrings

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Re: Active Pitchcontrol
« Reply #610 on: April 01, 2017, 10:19:06 AM »
Nice.  Maybe I missed it, but what is the material(s) that you are planning for the blades?  Great stuff.  ~ks

mbouwer

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Re: Active Pitchcontrol
« Reply #611 on: April 01, 2017, 03:16:14 PM »
Polyester. I want to gain more experience with it because the stuff gives the ability to make all sorts of shapes.

I like reading about your actuator project.

« Last Edit: April 01, 2017, 03:31:22 PM by mbouwer »

mbouwer

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Re: Active Pitchcontrol
« Reply #612 on: April 02, 2017, 07:51:37 AM »
The pivots with a filling of cardboard and tape around them to shape the polyester blade hubs.

mbouwer

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Re: Active Pitchcontrol
« Reply #613 on: April 03, 2017, 05:49:11 PM »
The polyester hubs which I want to fasten in the blades.
The bronze filing is mixed in the inner layer of polyester.
« Last Edit: April 03, 2017, 06:13:48 PM by mbouwer »

mbouwer

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Re: Active Pitchcontrol
« Reply #614 on: April 04, 2017, 05:20:05 AM »
After shaping the blades in PUR foam I have fixated the hubs.
Now I want to strengten and cover the blades with glass reinforced polyester.

mbouwer

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Re: Active Pitchcontrol
« Reply #615 on: April 05, 2017, 04:20:51 AM »
The polyestering and sanding of the blades take a few days.

On the outer contour of the generator ring I can glue 160 magnets ( 20 x 4 x 2 mm / holding force 1,2 kg )
The intention is a slowly rotating turbine of about 60 rotations per minute.
Maximum power 100 Watts.

I would like to discuss this design of the 3 phase generator.


kitestrings

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Re: Active Pitchcontrol
« Reply #616 on: April 05, 2017, 09:27:56 AM »
I assume the stator coils mount off the three supports at 120 degrees just behind the magnet rotor?  Are they radially mounted above the magnets?...or flat?

hiker

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Re: Active Pitchcontrol
« Reply #617 on: April 05, 2017, 11:18:48 AM »
60 rpm....voltage ?   
WILD in ALASKA

mbouwer

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Re: Active Pitchcontrol
« Reply #618 on: April 05, 2017, 12:52:07 PM »
coils radially mounted around the rotor just like the added photo.

about 230 / 380 volt

mbouwer

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Re: Active Pitchcontrol
« Reply #619 on: April 06, 2017, 11:12:17 AM »
The blades mounted.
While I try to collect more information about the configuration of the generator,
I can make the mechanism for the blade pitch.
« Last Edit: April 06, 2017, 11:26:22 AM by mbouwer »

Mary B

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Re: Active Pitchcontrol
« Reply #620 on: April 06, 2017, 06:45:32 PM »
What dia. are the blades?

mbouwer

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Re: Active Pitchcontrol
« Reply #621 on: April 07, 2017, 09:47:55 AM »
Perhaps next time I can try carbon fibre.

Mary B

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Re: Active Pitchcontrol
« Reply #622 on: April 07, 2017, 06:24:49 PM »
Nice! Wondered how big this was going to end up.

kitestrings

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Re: Active Pitchcontrol
« Reply #623 on: April 07, 2017, 08:52:29 PM »
Bigger than I'd pictured.  Can't wait to see it all assembled.  Great stuff. ~ks

mbouwer

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Re: Active Pitchcontrol
« Reply #624 on: April 08, 2017, 03:59:24 AM »
Thanks for your response. I just want to make a test set up to get more contacts with windmillfriends and to exchange ideas and parts.
I think the blade suspension can be made more simple and easyer to do.
Making the generator I find more difficult.

mbouwer

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Re: Active Pitchcontrol
« Reply #625 on: April 13, 2017, 03:38:50 PM »
For a few days I was on the section Hydro. Perhaps I can meet likeminded people there who have interest in making a water turbine.
But now it comes back on making the generator.

mbouwer

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Re: Active Pitchcontrol
« Reply #626 on: April 14, 2017, 08:33:05 AM »
A lot of simularity between a water- and a windturbine. For example the blade pitch.
 
« Last Edit: April 14, 2017, 08:41:47 AM by mbouwer »