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Forum Index : Windmills : the new Rotor arrived
| Author | Message | ||||
| brucedownunder2 Guru  Joined: 14/09/2005 Location: AustraliaPosts: 1548 |
Hello guys--The new Non-Cogging rotor hub has arrived. I installed it on a test bed with a 7/6 fine wire stator re-wire.( I know ,this will give me the highest volts at the lowest rpm) Turning it by one finger ,out of 7 phases through the bridge I get around 90 v. No cogging and no noise. When it's up the tower and the dc has to travel some 150 Metres things may be a bit different in the o/p dept. So, anyone want to buy 10 old rotors? I think not !! I'm going to try my hand at the Neo's conversion again ,just for the hell of it. Bruce. Bushboy |
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Gizmo Admin Group  Joined: 05/06/2004 Location: AustraliaPosts: 5078 |
Good to see Bruce. A 7p6p on .6mm wire stator will make some volts! Will be interresting to see how high it goes, just be carefull those voltages will be lethal. I use a 7p2p on .8mm wire for my 12v system, its working good. About your neo conversion, I did get an email from someone who tried it with 10mm wide magnets, and virtually no cogging. So it looks like the narrow magnets were the problem. Glenn The best time to plant a tree was twenty years ago, the second best time is right now. JAQ |
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| clarence Regular Member  Joined: 27/10/2006 Location: Posts: 63 |
Brilliant, turning with one finger, thats great news. looks like I might be lucky with my magnets I ordered, they are 10mm wide. |
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| brucedownunder2 Guru Joined: 14/09/2005 Location: AustraliaPosts: 1548 |
Guys, I noticed that the new hubs are a bit more reinforced and have different cooling/something? holes in them. The noise when spinning is way down compared to the old hubs . The voltage produced with that 7/6 on the fine wire(.6mm) is amazing ,I turned it watching the second hand on the workshop clock and at 60rpm is sits on 22 volts ,unloaded dc. I'm started on configuring a .8 mm into 7/6 to see if I can get the volts up a bit on that fellow.( it's way down on configured at 7/2 ). Bruce. Bushboy |
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| domwild Guru Joined: 16/12/2005 Location: AustraliaPosts: 873 |
Bruce, Don't forget to come to Perth with all this excitement! Amanda warned me about a thing called reactance, as the frequency will still be very high, isn't there going to be a problem getting a sufficient number of Amps out of the mill? Taxation as a means of achieving prosperity is like a man standing inside a bucket trying to lift himself up. Winston Churchill |
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RifRaf Newbie  Joined: 15/10/2006 Location: AustraliaPosts: 32 |
sounds great, seems i really need to get rid of my cogging so i get get the motor upto 300rpm easier cause it won't start putting power into the 12V batteries until that speed and is taking decent wind to get it there. So have a new rotor on order and will pick up an old stator to rewind instead of rewinding the ones i have now. Should be a week to get in they reckon. |
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Chris Senior Member  Joined: 12/09/2005 Location: AustraliaPosts: 146 |
Where can i get one of these new rotors for cheap in melbourne? I broke my old one, so i figure why not. |
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| clarence Regular Member Joined: 27/10/2006 Location: Posts: 63 |
Bruce, how strong do the ceramic mags seem compared to neo's of the same thickness? |
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| brucedownunder2 Guru Joined: 14/09/2005 Location: AustraliaPosts: 1548 |
Chris----- you have to order one through your local F&P washing machine mechanic -look up the yellow pages ,get a guy close to where you live and give him a call--Part No. is in previous posting. Clarence----- Don't know for sure ,but the Neo's of the same size would be heading towards 3 times as powerful. Bye the way I sprinkled some fine iron filings on the new ceramic tiles--there are 3 imbedded magnets in each tile ,sort of blunt arrow shape. Bruce Bushboy |
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| Chris Senior Member Joined: 12/09/2005 Location: AustraliaPosts: 146 |
Dam, last time i tried to get a F&P stator and hub thru a bunch of local F&P mechanics they wanted an arm and a leg ($150+). Ill try them again though, see what happens... Thanks. |
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| Gizmo Admin Group Joined: 05/06/2004 Location: AustraliaPosts: 5078 |
Sounds like they are over charging. I know they pay about $50 for them, so I would not expect to pay over $80 over the counter. If they want to charge more say you have spoken to another F&P agent who quoted you $70, and ask them why they are overcharging so much. It usually helps if there are a few other customers in the shop, and you raise you voice a little. Gets results. Glenn The best time to plant a tree was twenty years ago, the second best time is right now. JAQ |
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| clarence Regular Member Joined: 27/10/2006 Location: Posts: 63 |
chris, perhaps, looking at your post, the $150 quote was for a rotor and stator. I think, but I could be wrong that the rotor alone would be cheaper. |
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| brucedownunder2 Guru Joined: 14/09/2005 Location: AustraliaPosts: 1548 |
The rotor should cost around $65 --priced it from 2 sources-- same-so I think F&P keep an eye on what is charged?? Your $150 could easily be for both ,I think that would be about right. But u don't need both ,just the rotor, stators can be got from the tip--if you are lucky , or a six pack to the broken down machine sitting in the mechanics yard ? Bruce Bushboy |
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| Chris Senior Member Joined: 12/09/2005 Location: AustraliaPosts: 146 |
Sorry to hijack your thread bruce, But i got on to a place that will do it for me for $45+gst. So i think ill go with them. But they have to order it in i think |
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| clarence Regular Member Joined: 27/10/2006 Location: Posts: 63 |
thats a great price chris. thats a lot cheaper than buying neo's to convert a rotor. |
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Trev Guru Joined: 15/07/2006 Location: AustraliaPosts: 640 |
Hi all, Finally got most of the customers off my back and back to playing with windmills. I now have my double f&p White Pointer up in the wind and with a temporary furling on the tail. As I have said before I have never suffered from cogging and even now with the double, I still have no cogging problem. I still have seen the thing turn in such light wind with no charge. It starts charging in 5 mile/hour wind. The best I seen so far is 15 amps into 12 volt batteries with 15 mile/hour wind. Trev @ drivebynature.com |
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Pt w/field Matt Senior Member Joined: 24/02/2006 Location: AustraliaPosts: 105 |
hi trev what diameter are the blades? isnt the output a bit low for a twin 12v@15amps =180 to 210 watts depending on actual voltage matt down south |
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| Trev Guru Joined: 15/07/2006 Location: AustraliaPosts: 640 |
The blade diameter is 2.9m. Have I done something wrong??? What has others got from 15 mile/hour wind?? Trev @ drivebynature.com |
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| brucedownunder2 Guru Joined: 14/09/2005 Location: AustraliaPosts: 1548 |
Hello Trevor. No, you haven't done anything wrong. You are getting around what you can expect at 15 mph ,then watch it rise sharply when the breeze go to 18mph !!. I have my "non-cogging" rotor on my test rig on the bench--- connected up to voltmeter ,no problem to get ,say 30-40 volts ,slowly turning by hand--then connect a 24v battery to it -the turning is 10 times harder- ok, no cogging at all , but the turning is very stiff with a battery connected---- wonder ??? No wind here at present ,but it will be interesting to see if this "non-cogging" system is much better than my existing system- I'm a bit reserved on that,but we'll see. Bruce Bushboy |
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| KiwiJohn Guru Joined: 01/12/2005 Location: New ZealandPosts: 691 |
Bruce, those voltages appear a bit high to my mind but there are ways around that. Turns easy with no load but hard to turn with load on? That is exactly what is required! All the difference is going into your load. |
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