Author Topic: Active Pitchcontrol  (Read 332101 times)

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fabricator

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Re: Active Pitchcontrol
« Reply #165 on: March 28, 2012, 06:54:34 AM »
Fabricator:

  Actually, you are correct. Many of the new style turbines are direct drive with neo magnets. Enercon uses electric coil magnets and that is what you are looking at. Goldwind, Siemens, even the new 2.5 MW GE is neo magnet with direct drive.

  Gearboxes are on the way out on the commercial machines. It's just a matter of time.

Ok, I stand uncorrected or semi uncorrected.............
I aint skeerd of nuthin.......Holy Crap! What was that!!!!!
11 Miles east of Lake Michigan, Ottawa County, Robinson township, (home of the defacto residential wind ban) Michigan, USA.

midwoud1

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Re: Active Pitchcontrol
« Reply #166 on: March 28, 2012, 04:47:14 PM »

Interesting  Enercon factory vid.  Inside factory starts after 5 minutes.

Rgds  - F -

http://www.youtube.com/watch?v=NngywATy2ys

fabricator

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Re: Active Pitchcontrol
« Reply #167 on: March 28, 2012, 05:38:45 PM »
All you can say is awesome, those things are magnificent examples of what humans are capable of.
I aint skeerd of nuthin.......Holy Crap! What was that!!!!!
11 Miles east of Lake Michigan, Ottawa County, Robinson township, (home of the defacto residential wind ban) Michigan, USA.

JW

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Re: Active Pitchcontrol
« Reply #168 on: March 28, 2012, 06:56:23 PM »
Here' here

I say we embed a youtube video here.



I remember years ago (probably more than 6) where the Dan's were granted a tour of these type of 'Mega Turbines'

JW

midwoud1

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Re: Active Pitchcontrol
« Reply #169 on: March 29, 2012, 03:30:53 PM »

Lineair Actuator with adjustable stroke .

Motor 24Vdc  1000N ( electric wheelchair  junkyard )
Speed 10 mm / sec.
I made micro-switches on it as end stops.
Easy to change the stroke by sliding the m-switches.
Switch circuit forward - back by polarity change relay  12 Vdc .
Easy to connect with voltage Rpm sensor and micro-controller
Rgds - Frans -

http://www.youtube.com/watch?v=T0igWBX-r5E&list=UUhmCD9VGJTBJsh0tCDHsHbw&index=1&feature=plcp5279-0

fabricator

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Re: Active Pitchcontrol
« Reply #170 on: March 29, 2012, 05:12:24 PM »
Cool, that one looks pretty big though, I can see you are not going to stop until you have the perfect machine.  :)
I aint skeerd of nuthin.......Holy Crap! What was that!!!!!
11 Miles east of Lake Michigan, Ottawa County, Robinson township, (home of the defacto residential wind ban) Michigan, USA.

midwoud1

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Re: Active Pitchcontrol
« Reply #171 on: March 29, 2012, 05:34:27 PM »
Its a bit big to build in ,I plan it for a  mill larger blades.
The actuator runs very reliable , I had all the components in my workshop.
So it was cheap to make  , only time.

JW . Sorry I cant embed the youtube starting image , I tried it several times.

 Rgds . - F -


-edit-JW   

Hi Frans sorry for the late action on this I was out of town, there is a trick you have to use the url of just the video playing once. If the url autoplays several videos then it wont embed. the first time you see the & charictor in the url, delete everthing after that and it should solve the problem for you-
« Last Edit: April 11, 2012, 06:15:16 PM by JW »

mbouwer

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Re: Active Pitchcontrol
« Reply #172 on: March 31, 2012, 08:20:35 AM »
Hey Frans,

Looking at your drawing on page 2 , reply 39 of your topic:
Bringing the actuator down in the mast.
The size of the actuator is no problem.

 Regards Rinus

mbouwer

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Re: Active Pitchcontrol
« Reply #173 on: April 11, 2012, 04:21:12 PM »
Hallo Frans,
Do already you have new pictures of the progress of the Enercon 126
or haven't you been on the building site lately?

fabricator

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Re: Active Pitchcontrol
« Reply #174 on: April 11, 2012, 07:29:57 PM »
I just noticed something, in the picture with the crane and the spinner, there is a turbine in the background, does it only have two blades or is it just an optical illusion?
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11 Miles east of Lake Michigan, Ottawa County, Robinson township, (home of the defacto residential wind ban) Michigan, USA.

JW

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Re: Active Pitchcontrol
« Reply #175 on: April 11, 2012, 08:41:47 PM »
Fabricator; Its an optical illusion,  near as I can tell there are 3 blades there-




JW

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Re: Active Pitchcontrol
« Reply #176 on: April 11, 2012, 09:39:09 PM »
Yeah I guess when you study it enough it looks like the sun is on it just right to make it the same color as the sky.
I aint skeerd of nuthin.......Holy Crap! What was that!!!!!
11 Miles east of Lake Michigan, Ottawa County, Robinson township, (home of the defacto residential wind ban) Michigan, USA.

mbouwer

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Re: Active Pitchcontrol
« Reply #177 on: April 14, 2012, 04:58:12 AM »
Windmillfriends,

The Enercon is impressive.
Nearby stands the Darwind D115  and the Lagerwey L 93
Rinus

                                 

midwoud1

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Re: Active Pitchcontrol
« Reply #178 on: April 15, 2012, 02:40:07 PM »
Pitchcontrol design 2
Lineair actuator stroke 80 mm ,time 8 seconds ,  0 - 90 degrees
PVC pipe 40 mm with keyholes . ( Later stainless Steel )
No bevel gear . Easier to make ,less time .

- Frans -


make sure the "youtube" tags are before and after the youtube url -JW
« Last Edit: April 16, 2012, 09:14:39 AM by JW »

fabricator

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Re: Active Pitchcontrol
« Reply #179 on: April 15, 2012, 02:54:18 PM »
Absolutely beautiful, it's extremely cool watching this evolve, seems like it's pretty close to the simplest possible form.
I aint skeerd of nuthin.......Holy Crap! What was that!!!!!
11 Miles east of Lake Michigan, Ottawa County, Robinson township, (home of the defacto residential wind ban) Michigan, USA.

diy

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Re: Active Pitchcontrol
« Reply #180 on: April 16, 2012, 07:45:18 AM »
Nice work.
Keep improving
Rgds. Do

dloefffler

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Re: Active Pitchcontrol
« Reply #181 on: April 18, 2012, 11:53:34 AM »
Nice ideas. How does the gear assembly maintain lubrication?

Dennis

midwoud1

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Re: Active Pitchcontrol
« Reply #182 on: April 18, 2012, 01:27:58 PM »
Dennis.
The propeller rootshafts have sealed angular contact-bearings (lubricated)
The gear system is low friction with Ptfe teflon grease.
Checked every 6 months.

 - Frans -

fabricator

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Re: Active Pitchcontrol
« Reply #183 on: April 18, 2012, 06:38:00 PM »
There is no gear assembly in the new design.
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11 Miles east of Lake Michigan, Ottawa County, Robinson township, (home of the defacto residential wind ban) Michigan, USA.

mbouwer

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Re: Active Pitchcontrol
« Reply #184 on: April 20, 2012, 01:23:15 PM »
Windmillfriends,

Probably we are in a fair way to a perfect working active pitchcontrol.

regards Rinus

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Re: Active Pitchcontrol
« Reply #185 on: April 20, 2012, 03:49:53 PM »
I like it  a lot, my only problem is with all the electronics, it seems like a very simple fly ball governor could be used in place of the linear actuator, the balls fly out push on the rod the blades furl all in a completely linear fashion, there would of course be some testing to do with fly ball weight and fly ball spring tension, although the springs could be mounted on the pins that run in the slots on the blade hub.
I aint skeerd of nuthin.......Holy Crap! What was that!!!!!
11 Miles east of Lake Michigan, Ottawa County, Robinson township, (home of the defacto residential wind ban) Michigan, USA.

midwoud1

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Re: Active Pitchcontrol
« Reply #186 on: April 20, 2012, 04:37:49 PM »
I have had fly weights in front of the propeller and my experience was the prop still had high rpm in strong winds.
It was searching a balance between Rpm and centrifugal force .
I had the same story like JLT , People heared the sound of a runaway and had to run.
So I was looking for a way where I could feather the blades by an actuator, with the benefit to full feather and stop in case of storm ( 10 Bft )  and full charged batteries ,
And no load on the tower.
The electronics are not complex and quite easy to make on vero board .
If anybody is interested I can send the schematic diagram.
Would be nice to find someone who knows how to connect the Microcontroller  .Let a friend do the soldering .
Two months ago I knew nothing about Controllers
But after 3 hours help with software programming I was able to upload it.
And the machine is running like a watch.

   - Frans -


mbouwer

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Re: Active Pitchcontrol
« Reply #187 on: April 20, 2012, 05:15:15 PM »
Windmillfriends,

In our test drafts we always use a governor which overrules the electronics if necessary.
That's no problem.
Besides we see perfect active pitchcontrol on the professional windturbines all around us.
What we need is cooperation with electronic discipline to low budget simplify things.
Like Frans does.
Cooperation between hobby windmillbuilders is the key.

Rinus.

diy

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Re: Active Pitchcontrol
« Reply #188 on: April 20, 2012, 05:32:13 PM »
Rinus
So you make the mechanical parts for my small turbine, and I
deliver you all the electronics you need.
This is a serious offer.
Agreed?
Do


fabricator

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Re: Active Pitchcontrol
« Reply #189 on: April 20, 2012, 06:28:36 PM »
Frans, I understand, it is a fantastic system, it would be perfect if somebody could come up with a little black plug and play box with adjustable parameters, for us electronically challenged people. :)
I aint skeerd of nuthin.......Holy Crap! What was that!!!!!
11 Miles east of Lake Michigan, Ottawa County, Robinson township, (home of the defacto residential wind ban) Michigan, USA.

mbouwer

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Re: Active Pitchcontrol
« Reply #190 on: April 21, 2012, 03:56:37 AM »
Do you're welcome.
Let's get in touch.

dloefffler

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Re: Active Pitchcontrol
« Reply #191 on: April 21, 2012, 07:47:42 PM »
I have given some thought to the fly ball issue and it appears to me that dynamic balance might become an issue. From what I know about wheel balancing, weights are placed on both sides of the rim to eliminate this issue of essentially having the center of mass rotating in a plane not perpendicular to the rotational axes.

Keep up the good work, it is fascinating.

Dennis


mbouwer

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Re: Active Pitchcontrol
« Reply #192 on: April 22, 2012, 10:07:27 AM »
Windmillfriends,

The intention of the "Gewiekste"  is cooperation.
Bringing together knowledge of windmillbuilding enthusiasts.
Via testarrangements we want to go on forming components, striving
to translate the latest turbine techniques to our compositions.
Low budget and on hobby basis to real good working models of professional windturbines.

rds. Rinus

midwoud1

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Re: Active Pitchcontrol
« Reply #193 on: April 25, 2012, 04:13:14 AM »
Lifting the nacelle and ring-generator. Enercon  7,5 Mwatt
Look at the multi rotor flying video - foto camera .

- Frans -

Not a valid youtube URL

midwoud1

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fabricator

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Re: Active Pitchcontrol
« Reply #195 on: April 25, 2012, 07:55:15 AM »
It appears from the video of their factory that their towers are concrete sections, do you know if that's right?
I aint skeerd of nuthin.......Holy Crap! What was that!!!!!
11 Miles east of Lake Michigan, Ottawa County, Robinson township, (home of the defacto residential wind ban) Michigan, USA.

midwoud1

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Re: Active Pitchcontrol
« Reply #196 on: April 25, 2012, 10:33:23 AM »
Yes the tower is buildup with concrete ring sections . The sections are fixed with special glue.
Inside the section walls there are channels from top to bottom with  steel rods under tension .

 Rgds  - F -

fabricator

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Re: Active Pitchcontrol
« Reply #197 on: April 25, 2012, 11:11:20 AM »
Excellent, thank you.
I aint skeerd of nuthin.......Holy Crap! What was that!!!!!
11 Miles east of Lake Michigan, Ottawa County, Robinson township, (home of the defacto residential wind ban) Michigan, USA.