Author Topic: Active Pitchcontrol (Read 391535 times)

mbouwer · « **Reply #429 on:** May 25, 2014, 02:29:01 PM »

Wondering for what price you can buy a remanufactured Wincharger nowadays.

Rinus

diy · « **Reply #430 on:** August 01, 2014, 04:38:06 PM »

Thinking of a real good design:
The new 20 pole, 15 coil CAD with active pitch control.

Greetings Do

acme12 · « **Reply #431 on:** August 02, 2014, 07:59:39 AM »

looks expensive

http://www.northeastwindenergy.com/Tipod_Frame_Turbine.html

midwoud1 · « **Reply #432 on:** August 03, 2014, 06:42:53 AM »

Active pitchcontrolled blades
https://www.youtube.com/watch?v=fI5-DxQx7x8&feature=youtu.be

Works like the big windmills . Reliable 3 years now.

richp0169 · « **Reply #433 on:** August 26, 2014, 03:18:51 PM »

This is a fantastic design, the options for control are endless with the right circuitry.

Kudos.

mbouwer · « **Reply #434 on:** August 28, 2014, 04:04:38 PM »

Can we say active pitchcontrol is booming?

midwoud1 · « **Reply #435 on:** August 29, 2014, 02:58:52 AM »

A lot of progress in the development of active pitchcontrol.
Variable pitch propellers and micro-controllers.
You can create an invasion with a 1000 drone squadron.
The technical application we use to control our windmills is simple.
Can be booming.
https://www.youtube.com/watch?v=NRL_1ozDQCA&feature=youtu.be

mbouwer · « **Reply #436 on:** September 01, 2014, 03:50:53 PM »

We would like to find out if implementing the drone pitchcontrol on our windmills is possible.

Regards Rinus

midwoud1 · « **Reply #437 on:** September 02, 2014, 02:20:20 PM »

There are RC servos that can do the job.
Torque : 12,8 kg / cm 6volt . metal gear and ballbearings, compact dims.

lancewlksn343 · « **Reply #438 on:** September 26, 2014, 08:26:01 AM »

Quote from: midwoud1 on October 04, 2011, 04:11:34 PM

Hi All.
I am living in Northwest Holland . Average wind 5-5.5 m/sec . Building windgenerators several years .
Have some experience with making blades ( fixed- and passive pitch and active pitchcontrol )
I see that some of you ( Menelaos ) and other friends on Fieldlines are thinking about pitchcontrolled blades .
For the time of 3 months I have running a DIY active pitch controlled windgenerator.
Must say I am very content about it .
It is controlled by an actuator wich can be switched automatic and manual.
Blade angle from zero to 90 degrees in 8 seconds.
Propeller diam. 290 cm .
Controllable max speed 330 rpm . (adjustable)
Feathering and electrical brake in case of storm.
Generator disc type ( Hugh Piggott design ) 9 coils and 2x 12 neo magnets. 24 volt.

I see some advantages : Never overspeed , No overheat stator, No dumpload , No overload of batteries , controllable voltage and amps for inverters for batteries and grid tied ones. No material stress. With extra sensors No voltage controller.

http://www.youtube.com/user/midwoud1?gl=NL&hl=nl#p/a/u/1/csr2BLBQ6rc

and other uploads Midwoud1 on YouTube

Regards Frans.

(Attachment Link)
(Attachment Link)

Wow! this truly is a labor of love. Midwoud1, what can you not do? and to the people pitching in, you guys are awesome. Thank you for sharing this thread. This is an inspiration to me. Will be looking forward to following this thread.

mbouwer · « **Reply #439 on:** September 26, 2014, 04:47:32 PM »

and we are sure the best is yet to come

Lancewlksn343,
What are your plans to go build?

Regards Rinus

midwoud1 · « **Reply #440 on:** September 26, 2014, 05:13:17 PM »

Hi Lance.
Welcome to the forum.
Please some info about what you intend to do .
Battery charging or grid tie ?
Start with a basic design , or active bladepitch ?

Regards Frans ( midwoud1 )

midwoud1 · « **Reply #441 on:** December 24, 2014, 04:03:07 PM »

Merry Christmas to all people on the forum.
Frans & Teresa

kitestrings · « **Reply #442 on:** December 24, 2014, 05:36:35 PM »

Happy Holidays Frans & family. ~ks

mbouwer · « **Reply #443 on:** May 06, 2015, 01:04:39 PM »

Windmillfriends,

Trying to make an elektically driven yaw bearing.

Regards Rinus

mbouwer · « **Reply #444 on:** May 06, 2015, 04:26:50 PM »

Just found a discarded bearing of which we can use the balls

mbouwer · « **Reply #445 on:** May 07, 2015, 05:09:10 AM »

We want to use a simple worm gear drive.
Here is the welded wormweel.

kitestrings · « **Reply #446 on:** May 07, 2015, 09:00:27 AM »

Rinus,

Is the goal to optimize tracking of the wind, or to provide a means of turning the turbine out of the wind for regulation? And, if the latter, are you thinking this would be in lieu of variable pitch blades, or in addition to it? ~ks

mbouwer · « **Reply #447 on:** May 07, 2015, 09:51:33 AM »

Kitestrings,

We are searching for a simple implementation of a low weight, steered yaw bearing.
And we always want to be able to master the turbine so we think we need pitch control.

Regards Rinus

mbouwer · « **Reply #448 on:** May 08, 2015, 08:33:28 AM »

After this ballbearing we would also like to make a slide bearing implementation.

mbouwer · « **Reply #449 on:** May 09, 2015, 08:43:37 AM »

We have made the base ring for the slide yawbearing. Worm wheel is part of the construction now.

mbouwer · « **Reply #450 on:** May 11, 2015, 04:55:57 PM »

The slide ring we again made in lattice to reduce the weight and have a good stiffness.

mbouwer · « **Reply #451 on:** May 13, 2015, 08:38:47 AM »

The slide yaw bearing completed with locking ring.

mbouwer · « **Reply #452 on:** May 15, 2015, 05:15:15 AM »

A new setup.

mbouwer · « **Reply #453 on:** May 19, 2015, 07:00:28 AM »

The corresponding pivot.

mbouwer · « **Reply #454 on:** May 20, 2015, 05:16:14 PM »

On the mast it looks like this.

SparWeb · « **Reply #455 on:** May 21, 2015, 01:35:01 PM »

Rinus,
That is some impressive heavy metal.
I am looking forward to the result.

midwoud1 · « **Reply #456 on:** May 21, 2015, 02:11:55 PM »

Windvane yaw control.
Reed contacts , Polarity forward - Reverse relay , Windshield wiper motor.

Rgds Fbm.

kitestrings · « **Reply #457 on:** May 23, 2015, 11:55:37 AM »

Very cool. What is a the size of this? It's hard to tell from the pictures. Regards, ~ks

mbouwer · « **Reply #458 on:** May 24, 2015, 03:10:56 AM »

The diameter of the top of the mast is about 100 mm ( 4 inches )

mbouwer · « **Reply #459 on:** August 25, 2015, 09:59:12 AM »

Almost all the professionals use it.
Diy turbines with active pitchcontrol are hard to find.
How come?

Smithson · « **Reply #460 on:** August 30, 2015, 09:55:01 PM »

Hi: I have a few questions. I must say this is a very clever idea. Thank you for sharing.

1. Why do you limit the rpm from 180 to 350? I was thinking Scoraig Wind (Hugh) in one of his textbooks said that the maximum rpm for an axial is 3 times the cut in rpm. So that could be give or take 600 rpm. It could make a lot more power but maybe not as reliable.

2. I've only read about six pages of the thread so maybe someone has mentioned this but does the Sun Gear need to have a tooth count diviisonable by 3?

My understanding ( only a personal opinion) is that the the reason side facing is used on the axial flux is because they need speed. The machine you have probably only has 12lbs of copper whereas the Jacobs had maybe 30lbs so it could turn at a maximum of 300rpm and make full power. Thank you. Arch. Ps. I couldn't do the electronics (progaming) anyway but I might try the rpm counting

mbouwer · « **Reply #461 on:** August 31, 2015, 08:27:14 AM »

Smitson,

The electronics for the steering of Midwouds turbine is also on this topic.
And real good functioning for years now.

Greetings Rinus

News:

Author Topic: Active Pitchcontrol (Read 391535 times)