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martinjsto
Senior Member
Joined: 09/10/2007
Location: AustraliaPosts: 149 |
| Posted: 12:57pm 28 Feb 2008 |
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hi clarence, thanks for the info on the drum, i have located an old landrover series 3 drum that is 11 inches inside diameter, only slightly larger than the outside diameter of the original rotor, i will resin in the whole rotor. the problem is the drum is bulky and very heavy. can you post a pic of the mazda drum?
good idear about the machining as there is a tendency for the magnets to rock when set on an angle, i dont have access to a mill so probably wont go that way myself. imsmooth has contacted a chinese firm who makes them to your requirements and has had some made that have a radius on the outside and are trapezoidal for the angle, he has a post on them and i will be getting some from him soon as funds permit.
the size should be ok as i measured the new 7 phase rotor with 3 magnets per tile and seemed to be similar size, also the fit into the rotor was good with only a few mm between magnets, still its in the testing that will tell the story.
good luck with your conversion.
martin
free power for all
McAlinden WA |
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clarence
Regular Member
Joined: 27/10/2006
Location: Posts: 63 |
| Posted: 10:27pm 28 Feb 2008 |
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I should have said that I am using the mazda front hub and tapered bearings for my conversion. a friend is lathing an aluminum adapter plate to hold the stator to the hub. the whole thing should be very strong, and theoretically last for ever. I will eventually post a series of pics to show exactly what I am attempting but some lowlife liberated my camera, but I will try and borrow one. The drum has "mazda.dia.261.5mm" stamped on it if thats any help?
cheers clarence. |
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clarence
Regular Member
Joined: 27/10/2006
Location: Posts: 63 |
| Posted: 03:46am 22 Mar 2008 |
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I finally got the rotor and stator done, and wait for it, no cogging!!!  the wide neo's seem to have worked wonders for the cogging. The stator is a 0.6 mm wire model and I want it for a slow running vawt, so i wired it 6 pole star for max voltage. initial tests show it puts out 13 volts at 25 rpm 1 amp load. cant imagine it putting out too many amps but 
also should add I am getting 14 ohms between any 2 wires. that seems way 2 high resistance. the 100 series 6 pole stator I did yonks ago gives 1.3 ohms . I assume the 60 series stators have a lot more winds per coil? has anyone counted them?Edited by clarence 2008-03-23 |
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GWatPE
Senior Member
Joined: 01/09/2006
Location: AustraliaPosts: 2127 |
| Posted: 10:46am 23 Mar 2008 |
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Hi clarence,
Ecoinovation did publish some data on number of coils, wire dia and resistance.
cheers, Gordon.
become more energy aware |
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clarence
Regular Member
Joined: 27/10/2006
Location: Posts: 63 |
| Posted: 03:18am 24 Mar 2008 |
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ta Gordon I found that data. also has anyone wired a 7 phase stator in such a way that you can switch between poles? eg 7p6p and 7p2p using a multipole switch or even relays? that could be quite handy I reckon. |
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clarence
Regular Member
Joined: 27/10/2006
Location: Posts: 63 |
| Posted: 01:32am 29 Mar 2008 |
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just rewired a 80 series 7p6p and tested it with the neo mazda rotor. 24v at 60 rpm with a 10 amp load. I am very happy with this cutin speed should be about 40 rpm. and as stated before absolutely no cogging!!!
martin, how have you been getting on with your conversion? |
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martinjsto
Senior Member
Joined: 09/10/2007
Location: AustraliaPosts: 149 |
| Posted: 02:51am 29 Mar 2008 |
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hi clarence,
i have just started a new job a few weeks ago as a hydro purification tech working on reverse osmosis systems used in mining, i have been very busy in training so i havnot been able to do any work since last post,
your results are realy impressive,  can you post some pics?
it will be interesting what a 100 series put out under the 7p6p wiring, i have one sitting under my bench just waiting for the neo mod to be completed, your results inspire me. might have a few late nights trying to get it finnished. is this going into a vawt?
as im wanting to put mine in one
martin
free power for all
McAlinden WA |
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clarence
Regular Member
Joined: 27/10/2006
Location: Posts: 63 |
| Posted: 06:00am 29 Mar 2008 |
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sounds like an interesting job Martin. I plan to use mine on a vawt. I have made a very shabby looking triple helical fibreglass vawt. it starts in literally no wind with no load, but is perhaps a bit small. quite low torque, although it will spin up to 150 rpm in 50 km winds. I will take pics of all this tomorrow. as for the 100 series. I get 1.3 ohms resistance between any two phase wires. 5.6 ohms with the 80 series and 14 ohms with the 60. I could only hazard a guess that the 100 series would make 14 volts at maybe 60 rpm?
cheers clarence. |
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clarence
Regular Member
Joined: 27/10/2006
Location: Posts: 63 |
| Posted: 04:03am 30 Mar 2008 |
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here are a couple of pics. more to come when I get the hang of this new camera
( Fixed the pics for ya )Edited by Gizmo 2008-03-31 |
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clarence
Regular Member
Joined: 27/10/2006
Location: Posts: 63 |
| Posted: 06:17am 30 Mar 2008 |
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here is the helix vawt
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divemaster1963
Regular Member
Joined: 28/01/2009
Location: United StatesPosts: 46 |
| Posted: 02:18am 05 Feb 2009 |
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I am looking at new wind mill styles. what did you use for your base plate to mount the windings on.
thanks for the info.
looks great. how much is it producing and at what wind speeds. |
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martinjsto
Senior Member
Joined: 09/10/2007
Location: AustraliaPosts: 149 |
| Posted: 02:52am 05 Feb 2009 |
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wow that's a cool setup, i like the use of axle/hub. i was thinking about the wire access you have, do you think it might ware through and cause a short, i understand it does not rotate, the drum does, but through vibration.
the outputs at 60rpm is great, this will be plenty for my farm setup. i will have to have to dig out my project, its been shelved for a while now, great work m8.
martin
free power for all
McAlinden WA |
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