Project Journals > Bryan
Mini Dual Axial Project
Bryan1:
G'day Guy's,
With the left over neo mag's off my 4kw motor conversion project (soon to come) I decided to have a go at making a mini dual axial genny. As I had enough magnets + one spare I decided on doing a 16/12 config.
This is the cad image of the coil/magnet setup
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Next is a pic of one of the mag rotors just cast
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A pic of the front mag rotor all machined up to true it and painted
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Here is the mount I made for it
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All setup ready for the one coil test
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My crude but effective test setup, I used some plastic tube and used somw magnet wire to connect it then powered it off my 50 volt DC motor using my 30 volt lab psu.
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here is the result from the test coil setup
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This weekend I'll get the stator all wired up and the stator mold sealed with my free motor winding varnish (which is a great MDF sealer) and grab a new bottle of catalst for that 4kg's of fiberglass resin I have here so I can get the stator done.
I do have my eye on a 170x50mm x3.3metre straight grain Oregon plank at work and tomorrow I'll ask the boss as it's not going to be used if I can have it for my blade set for this project.
More to come.....
Regards Bryan
ChrisOlson:
Hi Bryan,
Looks to me like you'll get 12 volts DC out of it at just a little less than 200 rpm (assuming you wire the stator in wye).
Are those little magnets about the diameter of a nickel?
--
Chris
oztules:
I'm not sure your resistance figures are correct...... 0.11R for the coil, and 0.16 for the leadin.... 45 turnsof wire for 0.11r and a few inches of wire for 0.16.... are you sure about this?
If 24v then around 370-390 rpm cutin. What blade size are you considering.... 2meters?
..................oztules
Bryan1:
G'day Oztules,
When I short the leads of my fluke 865 scope meter the reading isn't zero it is 0.16 ohms so to correct the ohm reading I have to subtract that figure from the result. Today's jobbie is connecting the coils on the stator and hopefully get it cast. next weekend is a trip to the salvage yard to find some hardwood for the blades and Yes I am going for a 2 metre blade set for this project. Also our house array is 24 volts so yes the cutin will be around 380 rpm.
Cheers Bryan
Inspired to get going again after a night of sparkling ale......
ChrisOlson:
Bryan, what is the size of those magnets and what air gap you using? It would be interesting for me to try to figure backwards to see if I can figure the flux density in the air gap with those.
--
Chris
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