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Forum Index : Windmills : SEELEY STEPPER MOTORS
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| FandPwithPVC Regular Member  Joined: 09/09/2006 Location: Posts: 64 |
Hi all. The above motors are moving with Bruce Pickers 2 being sent this morning . They cost him $45 each plus postage of $26.45 depot to doorstep . A transport company I tried said $120 to $130 each. You need to contact me at 0883821658 so that I can give you my credit card details. I will also need your complete address and telephone number to determine postal costs . It is up to you as to when this happens . All for now Dennis L . |
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| brucedownunder2 Guru  Joined: 14/09/2005 Location: AustraliaPosts: 1548 |
Thanks Dennis, I am quite happy with the costs, knowing you have made plywood boxes and done all the travelling around to get the boxes despatched. Crew, get together and support this guy ,,, the last guy in the world to "rip you off" . Bruce Bushboy |
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Storm Regular Member Joined: 12/09/2005 Location: AustraliaPosts: 43 |
I just got home from buying a couple of these seeley motors from Dennis, much appreciated thanks mate, I had a great day! If anyone around Adelaide is interested and wants to learn about the home built windgens built on this site or just needs some initial direction give him a call, he will set you on the right path and has been through many stages of building development including various blade development and materials, motor sourcing, tower designs, F&P configurations including Neo rotors the works. The Seeley motors look and feel very promising, they don’t have the pole to pole cogging like the F&P inherently has due to its pole laminations so although as he states they will require larger props to run correctly they should start better without a heavy push commonly found with the F&P therefore they will run more consistently. Bruce you were right, a bargain!! 
Thanks again Dennis, I will keep in touch and let you know my progress. 
I also noticed the four screw holes on the sides of the cover; might this have been where the drum attached? |
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vasi Guru Joined: 23/03/2007 Location: RomaniaPosts: 1697 |
Sorry guys, The prices are very low. In Romania we don't have your sources and we spend more money for Neo magnets and the rest of materials and of course, we don't have your jobs and your life style. We are poor east europeans ... So, this is a public site... the entire world seeing you ... Hobbit name: Togo Toadfoot of Frogmorton Elvish name: Mablung Miriel Beyound Arduino Lang |
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| dwyer Guru Joined: 19/09/2005 Location: AustraliaPosts: 574 |
HI Vasi Sorry to hear that you don't have sources as you say "We are poor east europeans" so in Aussies We are paying high cost of living and running out fresh water . 
and other intersting stories that numbers of power station also cutting down due lack of water and it too late now 
Dwyer the bushman |
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| brucedownunder2 Guru Joined: 14/09/2005 Location: AustraliaPosts: 1548 |
Hello crew,, Dennis Latham packaged a few or these new "Seeley" motors and they arrived today --very professional job,Dennis--sorry to junk the boxes-glued together so well had to bash them apart --sorry. Anyhow,,,pulled one 500 watter apart and from first impressions,wow. the magnets are huge, the windings are around the F&P .8mm size. the bearing are huge --will last our lifetime,70mmm od -42id. but one observation from experience--I'm going to remove the dust seals,as I really don't think these are needed at 50 feet and did you know they increase the friction by "heaps"..but that's my opinion.. these motors are much bigger than Fisher & paykel washing machine motors ,so be aware that you are going to need (in my opinion) much bigger blades for start-up but once they get going ,,,,well,,, who know's yet,,???? Anyhow ,, a few pic's of what I saw 1 hour after the courier delivered them --- 
There ya go have fun Bruce 
 Bushboy |
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| Storm Regular Member Joined: 12/09/2005 Location: AustraliaPosts: 43 |
Hoping I might find a common shaft to suit the Seeley, not so, the diameter is 31mm! I checked the new steel sizes (metric and imperial) and aluminium the closest size tube I found was 32mmx3mm aluminium which I bought a short length of, I can cut it down the length then compress it with hose clamps to reduce the outside diameter to 31mm, I also bought a length of 25mm OD tube as this will fit the inside reduced 31mm tube to join it all like this 
Other options I considered were; lathing 32mm to 31 mm then adapting to a larger tube. Lathing 31.74, 1 1/14 solid rod to 31mm with the wires onnthe outside, Shimming 27mm steel tube using 2mm strapping, Lastly and not sure if it's available, using 31.75 steel tubing cut down its length the same as the aluminium tube I bought then welding it or slipping something inside it depending on its thickness. |
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| brucedownunder2 Guru Joined: 14/09/2005 Location: AustraliaPosts: 1548 |
Hello .. how about that ,,just came in from the workshop milling a shaft to fit the "Seeley"--- Used a piece of thick walled 32mm Aluminium ,put it in the lathe and dressed it down to a snug fit of 31mm .. Took it across to the milling machine and am in the process of milling a slot of 10mm length-wise for the "stops' internally moulded into the flange bosses. Handbrake was yelling ,,so had to come inside --that's life. lol.  Bushboy |
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| Storm Regular Member Joined: 12/09/2005 Location: AustraliaPosts: 43 |
Yeah yeah yaadda yaadda, I wish I had the equipment on hand, it takes time to build a toolkit. looks great tho, keep us in touch with your designs. |
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| brucedownunder2 Guru Joined: 14/09/2005 Location: AustraliaPosts: 1548 |
Hello storm ,, you will get there ---remember I'm 63 ,,lots of nuts and bolts have passed my way in the last 50 years. You and any of the crew are welcome to give me a call on 07 55453513 ,most happy to discuss ways of 'doing things' , helping out , sort of thing-- loving life Bruce Bushboy |
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| vasi Guru Joined: 23/03/2007 Location: RomaniaPosts: 1697 |
Hello Bruce, nice age and mill you have! Sorry dwyer, i searched "Aussies" region and i think you mean Australia. I am  about my reaction. I think every region in the world have his own problems, sorry again!Hobbit name: Togo Toadfoot of Frogmorton Elvish name: Mablung Miriel Beyound Arduino Lang |
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| brucedownunder2 Guru Joined: 14/09/2005 Location: AustraliaPosts: 1548 |
Hi Friends,, finished milling the shaft this morning --fitted nice and firm .. removed the plastic seals from the 4 sides of the 2 bearings --wow , what a difference--would recommend it to u all ,,,as from my experience, you can get these bearings easy ,, and , anyhow ,, they (un-sealed) ., are going to last you many years --in my opinion. One point I'm worried about --- (this is where the experts will come in ) Yawing ,, with this big diameter machine goings loads of RPM , I've felt it very heavy on yawing , --in my hand--- Ummmmm.. ,,maybe it could work in our favor, not move so suddenly,, any thoughts??? Bruce 
This is a pic of the timing belt and pulleys I might install. 1:1 at this stage , but could be changed.. Bruce Bushboy |
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| Feral Newbie  Joined: 03/12/2006 Location: AustraliaPosts: 39 |
Bruce, Is there a steel band hidden under the copper coils in the plastic ? |
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| brucedownunder2 Guru Joined: 14/09/2005 Location: AustraliaPosts: 1548 |
H Feral,, Yes there is -it's fairly typical for these big diameter stators to have ,what this has, a wide binding of hard drawn steel wire coiled tightly just inside the coils to felect the power towards the magnets(I think). This particular wire is a polished steel,very hard ,very springy not electrically connected . Also for anybody's interest ,there appears to be some sort of speed control/sensing "thingo" (can't see it ) , that is installed between the back steel banding coils and the back of the copper coils(in between)- this terminates on a pcb that is rj45 jacked out via a cat 5 (think) cable .(this cable was just cut off when I received the motors. Because there are just a few of us fiddling with these motors at this stage ,I think it would be a good idea for you ,or any of the crew actually, to keep in touch. My ph. No. is 07 55453513 . Bruce Bushboy |
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vawtman Senior Member  Joined: 14/09/2006 Location: United StatesPosts: 146 |
Hi Bruce Im very interested in the stator backing. What gauge steel wire is it?(guessing) How thick is the backing overall? Working on a homebrew inside out version of this design. Wish they were available here in the u.s.
Thanks Mark |
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| brucedownunder2 Guru Joined: 14/09/2005 Location: AustraliaPosts: 1548 |
Hello Mark ,, They are available in your country. Google Seeley international and search around their site for your country ,then your local distributor. These motors sit inside those ugly brown (or whatever color) cubic boxes on many roofs for evaporative air -conditioning. Common in low humidity country areas. The steel wire is around 1/16 inch or less in diameter...a band of around 2 1/2 inches of it .Just one wire thickness layer. Hope that helps Bruce Bushboy |
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Gizmo Admin Group  Joined: 05/06/2004 Location: AustraliaPosts: 5116 |
This motor is very similar in design to the brake drum style of windmill alternators popular before the axial flow design came along ( I'm not a big fan of the axial design, lots of fundamental problems with burned out stators and lost magnets ). There is some info on the brake drum alternator here http://www.scoraigwind.com/brakeupdate/index.htm, you'll see its almost identical to the Seeley motor. The Seeley has the advantage of air cooled coils backed by the steel core to complete the magnet path. Its a 3 phase machine like the F&P, but with over lapping coils instead if the separated coils of the F&P. The little senser would be like the small hall sensors on the F&P, and used by the controller to identifiy where the magnets are so it can feed the correct phase to drive the motor in the right direction. I think we will see a few more of these new motors in other appliances in the near future, I was looking at a Fujitsu catalogue for a split system air conditioner to replace my old in wall unit, and I noticed they also use a permanent magnet DC brushless motor that looks like a F&P. Glenn The best time to plant a tree was twenty years ago, the second best time is right now. JAQ |
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| vawtman Senior Member Joined: 14/09/2006 Location: United StatesPosts: 146 |
Thanks Bruce and gizmo These have a future in my opinion. Gizmo wrote,I think we will see a few of these in other appliances in the near future.WINDMILLS
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Megawatt Man Senior Member Joined: 03/05/2006 Location: AustraliaPosts: 119 |
G'day Dennis, This new machine (new for us) looks great. The engineer in me can't help asking the following question though. Please understand, I'm not questioning anyones judgement here, I'm looking at the engineering performance of the overall machine only. The motors are obviously serviceable. Why then, have so many of them been scrapped? Are they units that couldn't be serviced because of some other component failure? Is it because the plastic fans broke? Megawatt Man |
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| FandPwithPVC Regular Member Joined: 09/09/2006 Location: Posts: 64 |
Hullo All In reply to the above. From my understanding all the motors are returned to Seeleys under warrantee. Therefore you will not find them at your local tip. As to what goes wrong with them and why are they scrapped. The green covers although strong are quiet brittle so if they are broken they get returned. Currently I have rebuilt about 30 of the 54 I started with. They all had busted green covers which seems to be a deliberate act to make them unservicable Aprox half of these had magnet problems. The galvanised steel ring which surrounds these magnets had welding dags which caused magnet rocking. Small pieces of magnet was also to be found amongst the larger magnets. It is realitevly easy to fix. A more sinister problem is finding shorts between the phases. They the 7 so far cannot be seen but show up on my ohm meter during testing. They are eliminated All for now Dennis L |
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