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Forum Index : Windmills : Newbee

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aorn318

Newbie

Joined: 05/09/2010
Location: Australia
Posts: 20
Posted: 11:53pm 04 Sep 2010
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Hi Guy's have been reading your 4m's now for a few days and am liking what i read I have not gone into average wind speed as they have just built a wind farm down the road tower height is 65 meters (not that i can get that high)
What I'm planning is a duel F&P smart drive i got interested in these when i saw them on ebay rewired and decogged for around $90au + PH turns out 2 was going to set me back about $250 to get them so i went to the local tip and found 1 almost straight away I'm in the process of rewiring it now using 7x2c Delta trying to get the best from our weather conditions.
What I want to know is what coil con fig would be best for the second 1 I was thinking of 1x6c and 2x4c as in gizmo's rig would these coil config's work together?

Thanks in advance

Aron
If it ain't broke don't fix it
 
ProTow

Newbie

Joined: 03/09/2010
Location: United States
Posts: 29
Posted: 06:00am 05 Sep 2010
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First Welcome to the Forum.

Im still New to this too. so im no good to help you. But the Members on here are GREAT!!! Im learning more and more just in the few days i been on here.

Pro,
If it works the First time You did something Wrong.
 
arklan
Newbie

Joined: 18/08/2010
Location: Australia
Posts: 29
Posted: 11:25am 05 Sep 2010
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i would suggest having both stators use the same wiring config or else youll get different voltages from them.
 
AMACK

Senior Member

Joined: 31/05/2009
Location: Australia
Posts: 184
Posted: 12:26pm 05 Sep 2010
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Hi and welcome,
You do not have to have the same wiring configure on all motors. You can stagger them if you want. Staggering will not affect the output so to speak it will just change the cut in speed and the amount of power you get at different speeds. There are allot of posts on this topic. Some say this works better and someone else will disagree, it will depend on the site you have and the output you want to get. There are so many things to think of before you go into it so keep reading and asking questions as the only silly question is the one you don’t ask. Most of the members are very willing to help and will give you allot of information to think of before you take the leap.
You can mix DC voltage but DO NOT mix AC or it will fry the lot.

AMACK (or love fingers as a few member have called me in the past few weeks)

*Note to self

1. Make it thick

2.Make it heavy.

3.Make it stronger than it should be.

4. Don't rush the first job as the second job will cost more and take mor
 
aorn318

Newbie

Joined: 05/09/2010
Location: Australia
Posts: 20
Posted: 01:54pm 05 Sep 2010
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Hi all thanks for the welcome i have just finished rewiring my first of many stators today as I said earlier in 7x2c delta, and decided to do a test using a power drill to run the mill. and got around 70vac at 5 amps on z and z1 i guess your all familiar with the wire output code for what i have done but when i tested over x - x1 only got around 50vac at 3 amps is this typical behavior for the stator or have i made a mistake in the wiring? or am i testing across the wrong coils?
If it ain't broke don't fix it
 
Downwind

Guru

Joined: 09/09/2009
Location: Australia
Posts: 2333
Posted: 04:07pm 05 Sep 2010
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You are far better to rectifie the 3 phases and measure the DC voltage.

Doing a test with no load connected is a little useless as it tells you nothing really. (other than you are making voltage)

Pete.
Sometimes it just works
 
shawn

Senior Member

Joined: 30/03/2010
Location: New Zealand
Posts: 210
Posted: 08:14am 06 Sep 2010
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Hi i would wire them the same then use caps for low speed power, put a fast prop on for this wire configeration you will be impressed !!
I am using 100s 2x7c and 80s 7x2c into 24 volt bank the caps mod is the key
 
aorn318

Newbie

Joined: 05/09/2010
Location: Australia
Posts: 20
Posted: 11:40am 06 Sep 2010
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Hi Shawn thanks for the tip's i'm still early in the mill design there are so many different ideas out there the only thing i know for certain is its going to be HAWT.
I don't have the room in my tiny little yard for a 20+ foot device to spin.
I also need to consider noise for my neighbors sake.

I took your advice pete and wired in the rectifiers still only using 2\3 the power output (thanks dick smith only having 2 rectifiers) Then loaded it with a handful about 15 100k resistors (they popped but it was fun to watch) my poor drill didn't like it much either it looked to be running at around 50 - 100 rpm putting out about 6v didn't get time to test amp's need a better load controller will put something together and do some more testing

Here's a pic of the test unit sofar


I know its rough but it works

I'm also thinking of making a coil face plate for the test unit the face plate will be a bread board of sorts so i can chop and change coils (without the need to solder all the time) to find the best results and tune the stators to the mill.
Big project so might need some time/money lol but don't we all.

Just for an insight I haven't fully calculated the power I need just yet but am in the process of building a 3000va inverter and would like to reserve charge ability to maintain battery levels what hopefully I can still get for a steel from a wheel chair company, I'm a fanatical home brewer so want to run my shed and brewery from the device/s we currently make about 200lt per week so when I'm not busy with making I like to sample and play around with my projects I know alcohol and power =BAD but i'm not dead yet

Aron.
If it ain't broke don't fix it
 
aorn318

Newbie

Joined: 05/09/2010
Location: Australia
Posts: 20
Posted: 11:57am 06 Sep 2010
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on another thought I understand that gearing the mill will result in loss of efficiency but could this be countered by additional stators I have been toying with the idea of a geared prop shaft running 4 secondary shafts giving a grand total of 8 stators. It would take a whole lot of trial an error to get the ratios right (probably also need a centrifugal clutch to hold the shaft from kicking in until the prop had some speed and torque) you could also add a simple lever action pitch changer that worked against wind speed

All only ideas at the moment but would love feed back
If it ain't broke don't fix it
 
VK4AYQ
Guru

Joined: 02/12/2009
Location: Australia
Posts: 2539
Posted: 12:49pm 06 Sep 2010
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Hi Aron318

Keep it simple for the first project or you will bogged down trying to reinvent the wheel, it is a Major task to make multi rotor machines and you say you have a small backyard to put it in so keep it simple.

All the best

Bob
Foolin Around
 
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