Author Topic: Active Pitchcontrol  (Read 218912 times)

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mbouwer

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Re: Active Pitchcontrol
« Reply #837 on: August 29, 2017, 06:24:38 AM »
A base for continuing with the other components.

mbouwer

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Re: Active Pitchcontrol
« Reply #838 on: September 01, 2017, 03:22:13 AM »
First of all, back to the generator.
I would like to make a test rig of an axial generator with a lamination core between the two magnetrings.

mbouwer

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Re: Active Pitchcontrol
« Reply #839 on: September 02, 2017, 06:59:09 AM »
Axle and hub.

hiker

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Re: Active Pitchcontrol
« Reply #840 on: September 02, 2017, 07:45:05 PM »
Are you placing the coils on each side...two separate stators ?  Looks great...!
WILD in ALASKA

mbouwer

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Re: Active Pitchcontrol
« Reply #841 on: September 03, 2017, 02:33:15 AM »
I thought at 1 stator, with a steel lamination in the coils, between 2 magnet rings.

hiker

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Re: Active Pitchcontrol
« Reply #842 on: September 03, 2017, 11:11:47 AM »
Try it both ways..without Steel in the coil holes...then other...might have a bit of cogging..with the steel in the coils...might see a few extra volts with the steel..cogging might take that advantage away..?   Tried it once on a single phase alt..few years back....took a pipe wrench just to spin it around...on my 20-15   Three phase excersize bike alt..with steel in the coils..I can spin that with one finger....it's all in the design...good luck..
WILD in ALASKA

mbouwer

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Re: Active Pitchcontrol
« Reply #843 on: September 06, 2017, 04:05:21 AM »
Magnetrings+setting.

mbouwer

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Re: Active Pitchcontrol
« Reply #844 on: September 07, 2017, 06:48:06 AM »
For the generator I could shape the lamination core with the material of a scrap transformer.
Does anyone here have experience with that?

mbouwer

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Re: Active Pitchcontrol
« Reply #845 on: September 08, 2017, 06:55:49 AM »
Lamination core for the axial generator out of transformer sheets.

mbouwer

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Re: Active Pitchcontrol
« Reply #846 on: September 09, 2017, 09:07:29 AM »
New coilwinder. Magnets holding the core and two side plates to wind the coil.

hiker

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Re: Active Pitchcontrol
« Reply #847 on: September 09, 2017, 11:24:30 AM »
Nice...
WILD in ALASKA

mbouwer

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Re: Active Pitchcontrol
« Reply #848 on: September 10, 2017, 07:47:56 AM »
2 coils of 14 m wire / 10 layers. With inserted lamination core.

I wonder if it makes sense to add laminations in the space between the coils.

hiker

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Re: Active Pitchcontrol
« Reply #849 on: September 10, 2017, 10:07:09 AM »
Do a simple test...mount the coil..then run your mags by it...with and without lams..helped out on my pedgen...small amount of cogging..still able to spin with one finger...my coils are mounted to a steel band as well...the coils are fairly thick..so having the metal in the coil hole..helped to magnatize the entire coil...
WILD in ALASKA

hiker

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Re: Active Pitchcontrol
« Reply #850 on: September 10, 2017, 10:09:48 AM »
Energize the entire coil..might be a better way of saying it..😜
WILD in ALASKA

mbouwer

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Re: Active Pitchcontrol
« Reply #851 on: September 11, 2017, 03:04:14 AM »
Better use tapered shaped laminations, coils and magnets?

mbouwer

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Re: Active Pitchcontrol
« Reply #852 on: September 12, 2017, 07:49:49 AM »
Seeing the coils in the mould I think I'd better take another ratio of more and smaller coils and lam.core.

Adriaan Kragten

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Re: Active Pitchcontrol
« Reply #853 on: September 13, 2017, 02:13:33 AM »
Using iron coil cores will certainly increase the strength of the magnetic flux flowing through the coils as the air gap becomes much smaller. Therefore the voltage generated at a certain rotational speed will be much higher. However, iron cores may cause strong fluctuation of the clogging torque depending on the number of armature poles and stator coils. This fluctuation is maximal if the number of armature poles is equal to the number of stator coils. This fluctuation can be minimised if the number of armature poles is two more or two less than the number of stator coils but this requires a special winding (see public reports KD 560, KD 580 or KD 632).

mbouwer

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Re: Active Pitchcontrol
« Reply #854 on: September 14, 2017, 03:18:17 AM »
If I can use transformer sheets the shaping of a lamination core becomes easier.

Hub +rear magnet backing ring.

mbouwer

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Re: Active Pitchcontrol
« Reply #855 on: September 15, 2017, 04:19:24 AM »
The distance between the magnetrings I now can vary up till 34 mm.
Each ring 30 magnets 10 x 5 (thickness 4 mm.)?

mbouwer

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Re: Active Pitchcontrol
« Reply #856 on: September 23, 2017, 02:51:31 AM »
The lamination packages in the mould pressed on a polyester layer.

mbouwer

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Re: Active Pitchcontrol
« Reply #857 on: September 25, 2017, 07:23:59 AM »
Modified coilwinder.

Bruce S

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Re: Active Pitchcontrol
« Reply #858 on: September 25, 2017, 09:30:30 AM »
That looks like something I can turn my spare meat grinder into .
Thanks for the idea!
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