Author Topic: Active Pitchcontrol  (Read 226034 times)

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mbouwer

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Re: Active Pitchcontrol
« Reply #864 on: September 30, 2017, 04:39:17 AM »
You're right. I have adjusted reply #862
I will buy 34 magnets. How would you connect the coils?

mbouwer

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Re: Active Pitchcontrol
« Reply #865 on: October 01, 2017, 04:40:11 AM »
Ready for packing the coils.
I want to have the start-and end wires outside of the mould.
Different circuits are possible than.
« Last Edit: October 01, 2017, 04:59:23 AM by mbouwer »

mbouwer

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Re: Active Pitchcontrol
« Reply #866 on: October 02, 2017, 04:02:09 AM »
Capturing the wires is depending on the way of connecting.

mbouwer

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Re: Active Pitchcontrol
« Reply #867 on: October 03, 2017, 08:34:23 AM »
Some measurements first.

SparWeb

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Re: Active Pitchcontrol
« Reply #868 on: October 03, 2017, 12:54:21 PM »
Looking good.
The oscilloscope finally give me some scale to judge the size!
How have they turned out?
May I ask if you are only testing resistance and continuity, or other parameters, too?
No one believes the theory except the one who developed it.  Everyone believes the experiment except the one who ran it.

System spec: 135w BP multicrystalline panels, regulated by Xantrex C40, DIY 8ft diameter wind turbine, regulated by Tri-Star TS60, 800AH x 24V AGM Battery, Xantrex SW4024

mbouwer

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Re: Active Pitchcontrol
« Reply #869 on: October 04, 2017, 03:23:36 AM »
Once this test set up is working properly I can scale up.
With the scope it is possible to measure characteristics like volts when I move a magnet over a coil.
Now organizing the wiring.

mbouwer

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Re: Active Pitchcontrol
« Reply #870 on: October 05, 2017, 04:51:52 AM »
Plan for connecting the coils and shaping a terminal block.

mbouwer

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Re: Active Pitchcontrol
« Reply #871 on: October 06, 2017, 02:22:36 AM »
Got 68 magnets + glue.

mbouwer

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Re: Active Pitchcontrol
« Reply #872 on: October 07, 2017, 04:30:33 AM »
The magnets glued to their backing rings.

mbouwer

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Re: Active Pitchcontrol
« Reply #873 on: October 08, 2017, 03:32:53 AM »
Stator terminal block in polyester.

mbouwer

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Re: Active Pitchcontrol
« Reply #874 on: October 12, 2017, 02:37:44 AM »
The thickness of the lamination core is 11 mm.
Now stacking magnets.

mbouwer

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Re: Active Pitchcontrol
« Reply #875 on: October 15, 2017, 04:03:06 AM »
When ordering extra magnets I can make stacks of 3, 4 or 5 pieces.
 

mbouwer

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Re: Active Pitchcontrol
« Reply #876 on: October 18, 2017, 02:55:37 AM »
Is this real state of the art axial flux technology?

https://www.youtube.com/watch?v=rGu7XDapR58&t=
« Last Edit: October 18, 2017, 03:03:00 AM by mbouwer »

Mary B

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Re: Active Pitchcontrol
« Reply #877 on: October 18, 2017, 04:52:06 PM »
No design breakdown of how it is built... I smell snake oil...

Is this real state of the art axial flux technology?

https://www.youtube.com/watch?v=rGu7XDapR58&t=

joestue

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Re: Active Pitchcontrol
« Reply #878 on: October 18, 2017, 05:26:46 PM »
its been known for a very long time that axial flux machines have a higher torque density at the cost of efficiency.

the largest 5,7,10MW wind turbines are all radial flux, neodymium magnet machines. they also have generators in them that are larger than the 100MW hydro power generators. (which don't need any magnets to get the same "efficiency" )

mbouwer

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Re: Active Pitchcontrol
« Reply #879 on: October 19, 2017, 07:18:54 AM »
It is about whether this axial implementation on youtube, scaled down, can be a guidance for homebuilders.
« Last Edit: October 19, 2017, 07:27:21 AM by mbouwer »

mbouwer

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Re: Active Pitchcontrol
« Reply #880 on: Today at 04:03:46 AM »
Turning at about 60 rpm it shows 1,5 volts.
Before scaling up what to do to improve this test set up?
Make a new thinner lamination core and thus less stacked magnets?

SparWeb

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Re: Active Pitchcontrol
« Reply #881 on: Today at 12:59:02 PM »
My instinctive suggestion is to make each pole 4 magnets, two wide, instead of a stack of 5.  To illustrate:

You have shown:
Code: [Select]
------------- (ROTOR)
  N    S
  N    S
  N    S
  N    S
  N    S
             gap
~~~~~~~~~~ (STATOR)
             gap
  S    N
  S    N
  S    N
  S    N
  S    N
------------- (ROTOR)

My recommendation:

Code: [Select]
------------- (ROTOR)
 NN   SS
 NN   SS
             gap
~~~~~~~~~~ (STATOR)
             gap
 SS   NN
 SS   NN
------------- (ROTOR)

This arrangement allows the flux path to be much shorter for all magnets, and is both thermally and structurally more stable.
No one believes the theory except the one who developed it.  Everyone believes the experiment except the one who ran it.

System spec: 135w BP multicrystalline panels, regulated by Xantrex C40, DIY 8ft diameter wind turbine, regulated by Tri-Star TS60, 800AH x 24V AGM Battery, Xantrex SW4024