Author Topic: Windmill Project Innotech (Read 25497 times)

Marijn_Innotech · « **on:** February 01, 2012, 08:16:45 AM »

We just started this windmill project but first let me introduces myself.

My name is Marijn van Antwerpen, 20 years old and I'm in my training period from school and I'm working at Innotech Europe B.V. in the Netherlands.

My training period started the 30th of January 2012, but for the preparation we already spend 2 months. In those 2 months we spend a lot of time on how we want to make the windmill. We decided to make a 4500 mm diameter windmill with pitch control. And for the generator we assume the Hugh Piggott design.

We also started with the 3D sketches in solidworks. You can see the pictures below.

During the project I will keep you all up to date.

Marijn van Antwerpen

www.innotecheurope.nl

marijnvanantwerpen@gmail.com

electrondady1 · « **Reply #1 on:** February 01, 2012, 08:46:27 AM »

it looks like a very good beginning .
what material will be used to form the blades

Bruce S · « **Reply #2 on:** February 01, 2012, 09:00:24 AM »

Welcome aboard!
The solid works picture is very nice.
Could you tell us a little more of the design characteristics of the mill?
Voltage , magnets , wire size etc.
4.5m is an "interesting" size machine

Cheers
Bruce S

Marijn_Innotech · « **Reply #3 on:** February 01, 2012, 10:10:04 AM »

Quote from: electrondady1 on February 01, 2012, 08:46:27 AM

it looks like a very good beginning .
what material will be used to form the blades

For the blades we will use glass fibre and epoxy. Using vacuum injection we bring this to the core.

jarrod9155 · « **Reply #4 on:** February 01, 2012, 10:22:32 AM »

Nice design , what is the diameter of the magnet rotors and the shaft . If I'm guessing the rotors are 18 inches and the second rotor bolted to the first will have problems with vibration durring high loads . It will work but will limit your air gap around the stator . My suggestion would be to keep both plates mounted to the shaft with the spacers still used as far out as possible to help tie the plates together .
Jarrod

dinges · « **Reply #5 on:** February 01, 2012, 10:47:30 AM »

Looks like a fellow countryman. Welkom op dit forum

Mind if I ask which school you're at? TUE? HTS? MTS?

Your proposed project appears to have vari-pitch blades. Interesting. Hopefully you'll do a write-up of those as well. Getting them to work is not trivial though, as a search on this forum will show. Many have tried and failed. But it can be done, and has been done.

Just a thought, but if you have the machining capabilities, as it appears Innotech has, I'd also consider a motorconversion as opposed to an axial flux alternator. But perhaps you've already considered that option.

Looking forward to updates on the project.

Marijn_Innotech · « **Reply #6 on:** February 01, 2012, 11:10:29 AM »

we're using 16 magnets on each plate. the coils are having a wire size of 1.4mm. We want to reach 48v but we're not sure what we want to do whit the electricity.

we want to make more components then only the blades out of glass fibre (carbon fibre) and epoxy, more about that later.

here a section view

Marijn_Innotech · « **Reply #7 on:** February 01, 2012, 11:13:52 AM »

here is the pictures

SparWeb · « **Reply #8 on:** February 05, 2012, 11:01:52 PM »

The drawings look very nice.
Try to identify the final destination of the power produced - if you are building a product for sale, it makes sense to identify the customer now. The "grid-tied" customer is very different from the "off-grid" customer. With an axial-flux generator you can select stator wire combinations that are more suitable for a grid-tied turbine with a MPPT controller (Midnight Classic or Power One Aurora) or a different stator that will be suited to the battery-charge situation that you've described already. Although this sounds like you can make the choice later, just by changing the stator design, you may discover some design limitations that get built in that work with one power situation but not the other.

I look forward to seeing your progress!

Marijn_Innotech · « **Reply #9 on:** February 13, 2012, 04:45:29 AM »

Our first idea was to make a 48V generator, but when we were looking for a power inverter we saw that there were more inverters for 12V. Thats why we decided to go for a 12V generotor. Last week we started to make the coils with our coil winder as you can see in the picture. In one of the coils we put a temerature meter for the control unit.

Problems with posting the pictures, hope to upload them later today

ghurd · « **Reply #10 on:** February 13, 2012, 07:48:48 AM »

It would be a good idea to reevaluate the 12V decision.

That is a large machine, and could make a lot of power.
A lot of power at 12V is a lot of amps.
A lot of amps means Huge wire, and plenty of wire losses.

Something that size would be better suited to 48V.
G-

Marijn_Innotech · « **Reply #11 on:** February 13, 2012, 01:06:23 PM »

here are the pictures.
We wired the coils with 2x1.8 wires.
Sorry I made a mistake, i mean 24V instead of 12V.
Does annyone know what would happen when we fill up the cores of the coils with laminated steel?
Would that give more power? And what about the temperature in te generator? I would like to hear your ideas
and experience about that.

Marijn_Innotech · « **Reply #12 on:** February 13, 2012, 01:09:35 PM »

Marijn_Innotech · « **Reply #13 on:** February 13, 2012, 01:10:49 PM »

Marijn_Innotech · « **Reply #14 on:** February 13, 2012, 01:11:51 PM »

Marijn_Innotech · « **Reply #15 on:** February 13, 2012, 01:14:07 PM »

Marijn_Innotech · « **Reply #16 on:** February 13, 2012, 01:16:41 PM »

In the next picture you can see one of the rotorplates we lasered.

Marijn_Innotech · « **Reply #17 on:** February 13, 2012, 01:19:09 PM »

DanB · « **Reply #18 on:** February 13, 2012, 01:57:20 PM »

It all looks very nice! The shop at Innotech is looking good, I would love to visit again.
If you fill the holes with steel of some sort, the alternator will cog badly and assembly might become a nightmare ~ and ~ in running, it maybe hard to keep the stator out of the magnet rotors. If its powdered steel, or laminated steel somehow.... you will avoid most eddy current losses but no matter what you do it's going to cog badly. I would not do that with this sort of alternator design.

I'm not sure I'm keen on the use of tie wraps to hold the coils together either, It's probably just fine but it might add a thicker layer of resin between the surface of the stator and the coils and impede cooling (slightly). That is probably just nit-picky though I'm sure it will work fine.

Your posts might look better in the future if you can figure out how to post all your pictures in one post, not a big deal though.

Thanks!

JW · « **Reply #19 on:** February 13, 2012, 03:41:52 PM »

Its possible to insert 8 picture's in each post

http://www.fieldlines.com/index.php/topic,146470.msg1002835.html#msg1002835

Feel free to ask questions

Marijn_Innotech · « **Reply #20 on:** February 16, 2012, 07:36:36 AM »

Quote from: jarrod9155 on February 01, 2012, 10:22:32 AM

Nice design , what is the diameter of the magnet rotors and the shaft . If I'm guessing the rotors are 18 inches and the second rotor bolted to the first will have problems with vibration durring high loads . It will work but will limit your air gap around the stator . My suggestion would be to keep both plates mounted to the shaft with the spacers still used as far out as possible to help tie the plates together .
Jarrod

Thanks for you reaction, you right about the vibration. I designed the generator again and we already lasered the two rotorplates as you can see in the pictures.

Marijn_Innotech · « **Reply #21 on:** March 01, 2012, 06:08:22 AM »

Time for some new updates.

Last week we made a beginning on the wingmodel, were later the mold will made of.
first we cut out 4 different profiles. 1.profile round 100mm 2. NACA 4428 3.NACA 4420 4.NACA 4412 (as you can see in the picture)
After that we made the profiles in the right position on a piece of tempex and made the wing profile using a heat wire.

Marijn_Innotech · « **Reply #22 on:** March 01, 2012, 06:39:42 AM »

We also made a begin on the hub were the blades come in.

the hub can be cut in 6 of the same pieces, from one of those pieces we made a model.

Marijn_Innotech · « **Reply #23 on:** March 01, 2012, 07:13:40 AM »

and this week we we made the mold from the model.

Marijn_Innotech · « **Reply #24 on:** March 09, 2012, 02:23:44 AM »

Yesterday I made this logo with a friend of my. What do you think about it?

Bruce S · « **Reply #25 on:** March 14, 2012, 09:58:51 AM »

Quote from: Marijn_Innotech on March 09, 2012, 02:23:44 AM

Yesterday I made this logo with a friend of my. What do you think about it?

(Attachment Link)

I think you have a second job possibility of being a graphic design engineer

Cheers;
Bruce S

Marijn_Innotech · « **Reply #26 on:** March 22, 2012, 10:33:40 AM »

Her some new pictures.

the 3 parts are glued together and ready for the mold.

also the blademodel is far as ready for the mold.

Marijn_Innotech · « **Reply #27 on:** April 03, 2012, 08:18:40 AM »

Time for a new update.
We had the blade model finished as you can see in the pictures before.
So it was time to start at the mold of the blade.

Ontheronix · « **Reply #28 on:** April 15, 2012, 01:51:00 PM »

Hello Marijn, what are you studying?
Greets from Belgium

Marijn_Innotech · « **Reply #29 on:** April 16, 2012, 04:11:52 AM »

Quote from: Ontheronix on April 15, 2012, 01:51:00 PM

Hello Marijn, what are you studying?
Greets from Belgium

I'm studying at the ROC in Tilburg. Just 5 Km from Belgium. And you?
Gr, Marijn

Ontheronix · « **Reply #30 on:** April 16, 2012, 06:59:02 AM »

Hello Marijn, what are you studying exactly, and what year?
(I have a bachelor degree in the IT sector, not very relevant, this is more a hobby for me)

Marijn_Innotech · « **Reply #31 on:** April 16, 2012, 10:38:26 AM »

Quote from: Ontheronix on April 16, 2012, 06:59:02 AM

Hello Marijn, what are you studying exactly, and what year?
(I have a bachelor degree in the IT sector, not very relevant, this is more a hobby for me)

oke, I'm studying Mechatronica. That's a mix of mechanic, electric, programming and 3D sketching.
I'm now in my final year.

Ontheronix · « **Reply #32 on:** April 17, 2012, 11:30:40 AM »

Seems interesting! It looks that NL is ahead of BE on such things.

I assume you have to document all this? I'm curious to read up on the details (like moulding process and pitching setup and so)
Where will the mill be placed when it's finished? Do you already have a tower setup in mind?

News:

Author Topic: Windmill Project Innotech (Read 25497 times)