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turnymf
Regular Member

Joined: 04/10/2008
Location: Australia
Posts: 84

Posted: 12:50am 04 Oct 2008

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Great site

I was looking around for a small diy wind generator to run some leds around my house for the kids at night, when I stumbled in here

Now I want to build a fnp vawt and run some garden lighting and maybe a light pump as well(12v)

I have gathered some stators and blown the dust off the old arc welder

My first attempt was a dual stator exercise bike, unmoded stators wired in low zig zag config for single phase mains
The stators have been filed but it has a huge start torque brake until I get the revs up(11 to 1 hub to pedal ratio). It will light several globes and I have plugged in a old neon sign transformer to generate a arc for the kids amusment
I have to go back to it as I may have mucked up a winding polarity somewhere, huge resistance on start( loaded or not)

I have just rewired a 42 pole to 7p1p with a 36 pole hub
Beautiful
Haven't wired up bridges yet but globe loading to star centre looks promising

Cheers for everyone who contributed to this site

I'm off to the shed

Gizmo

Admin Group

Joined: 05/06/2004
Location: Australia
Posts: 5107

Posted: 06:00am 05 Oct 2008

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Hi turnymf

Glad you like the site.

Sounds like you may have wired that dual stator wrong, the F&P's are a 3 phase machine and there isn't any way to connect all 3 phases together to make 1 phase. But you can take 1 phase from any two outputs, but this means your only using 1/3 of the available output. ZigZaging the connections wont work.

Let us know how you go with the 7 phase conversion. Only a few people have made the 7 phase plunge, but those that have all report excellent results.

Glenn

The best time to plant a tree was twenty years ago, the second best time is right now.
JAQ

turnymf
Regular Member

Joined: 04/10/2008
Location: Australia
Posts: 84

Posted: 04:35am 04 Nov 2008

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Hi Glenn

Well the 7 phase conversion went ok, looking around for outside bits

My cro sprang to life the other day so here is what I'm getting with the pedal power and 2 unmod F&Ps wired zigzag, on the same shaft facing each other

350v p-p into a 75w globe

cheers

Gill

Senior Member

Joined: 11/11/2006
Location: Australia
Posts: 669

Posted: 09:49am 04 Nov 2008

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G'day turnymf,
Welcome aboard. Good to hear your right into it already and have got the kids involved (peddling).

I'm a bit of a self taught hack and haven't heard of the dual zig-zag arrangement and can't fathom what it might be. Is it possible to sketch the circuit and post it so I can stop scratching my head?

Ta.

A shot of the bike would be nice too?

was working fine... til the smoke got out.
Cheers Gill _Cairns, FNQ

turnymf
Regular Member

Joined: 04/10/2008
Location: Australia
Posts: 84

Posted: 01:16pm 04 Nov 2008

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Hi Gill,
I'm only a hack that hasn't been taught yet

Here is the bike, apart from the u bolts all from the tip. I chucked it together quickly to see if it would work.
Not a great shot,and it's changed slightly, but you can get the idea
It has the hubs wound out to make it a bit easier for my youngest, but they both wind in fully
No good for my vawt as the turbine size would get out of hand

I saw this posted by someone, somewhere.
I believe it's off a 3 phase motor I have used the low zigzag config

I'm all about the turbine at the moment, which is a bit of a cross between the magwind and a involute turbine
Well... at the moment it is

cheers

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