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Forum Index : Windmills : need help
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DTV004 Regular Member  Joined: 30/04/2009 Location: United StatesPosts: 65 |
hi to all i buy 3 motors from the local scrap & metal and i like to know if this will be good for wind will, i have the propelers. so i will start today..pic's feel free for opinions... 
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Gizmo Admin Group  Joined: 05/06/2004 Location: AustraliaPosts: 5119 |
That looks like a AC servo motor. The bit at the back is a encoder. Does the shaft rotate easily? Sometimes these have an internal brake that will need to come out before you can use it. If it is a AC servo, it could make a good windmill. You would need to connect up a meter and give it a spin to see. Glenn The best time to plant a tree was twenty years ago, the second best time is right now. JAQ |
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| DTV004 Regular Member Joined: 30/04/2009 Location: United StatesPosts: 65 |
yes this motor spin very easy i open the motor and the have 3 wires like my old alternator. i test the voltage hand spun results from 6v up to 45v i wil post more tomorrow...thak you |
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| Gizmo Admin Group Joined: 05/06/2004 Location: AustraliaPosts: 5119 |
Well it sounds like it would work just fine on a windmill then. All you need to do is add a 3 phase rectifier to those 3 wires and your ready to go. Do you have access to a lathe? If you can find out what RPM equals what voltage, then you can make an informed quess about what turbine blades to use. Glenn The best time to plant a tree was twenty years ago, the second best time is right now. JAQ |
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GWatPE Senior Member  Joined: 01/09/2006 Location: AustraliaPosts: 2127 |
A quick calc from the nameplate data. 400rpm gives approx 24VAC at approx 140W. Gordon. become more energy aware |
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| DTV004 Regular Member Joined: 30/04/2009 Location: United StatesPosts: 65 |
ok up date new pic.of my wind mill now i need wind... 
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| GWatPE Senior Member Joined: 01/09/2006 Location: AustraliaPosts: 2127 |
The winding resistance is 2.2 ohms. This is quite high and will limit the useful power on a 24V system. This was designed for 240VAC at 4000rpm. The wiring is rated for 5A continuous on the nameplate. Gordon. become more energy aware |
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| DTV004 Regular Member Joined: 30/04/2009 Location: United StatesPosts: 65 |
thanks for the comment but im planning to use it for 12 volt bank so what your telling me is it wont be enought for 24volt system  |
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| GWatPE Senior Member Joined: 01/09/2006 Location: AustraliaPosts: 2127 |
The useful power is lower at a lower system voltage, without a rewire of the windings. The maximum continuous winding current is the key, 5A. The 2.2 ohms is very high for a 12V alternator. 400rpm would produce approx 100W output. 100W would be dissipated in the windings as well. at this power level, half the power is lost as heat in the windings. The alternator would probably burn at higher sustained power levels. I would look for a different alternator. Gordon. become more energy aware |
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| Gizmo Admin Group Joined: 05/06/2004 Location: AustraliaPosts: 5119 |
Hi DTV004 Thats a interesting looking windmill, it good to see windmills made from so many 2nd hand parts. Gordons right, its good for only 100 watts or so, but I dont think it will have any problems with over heating. Those servo motors are designed to work very hard and last a long time. And it has a normal rating 1400 watts, so I dont think 100 watts of internal heating will have much effect. I would however take off the cover, let that black aluminum motor casing radiate any heat. If it does run warm, make a heat sink from some scrap aluminum and bolt it to the case to dissipate the heat. I would also extend the tail further out, I think its a little too close and the turbine will struggle to follow the wind. But apart from that, its a nice cheap windmill build. Its good to see parts destined for the scrap bin turned into something useful. It may not be efficient, but it will work just fine and could last for years. Glenn Just adding, once you get it going, try it with only 3 blades. I think you'll find it makes near as much power as 6 blades, and you'll end up with 3 spare blades The best time to plant a tree was twenty years ago, the second best time is right now. JAQ |
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Smart Drives Senior Member Joined: 06/07/2009 Location: AustraliaPosts: 115 |
. All smart drive parts sold Custom built turbine parts on Multicam flatbed CNC Router |
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| DTV004 Regular Member Joined: 30/04/2009 Location: United StatesPosts: 65 |
ok after 3 days of testing the max volts 14v on super hi speed on normal wind 7v to 10v... so now i buy this motor from ebay ...so i need you opinion this motor produce 16v with no problem at low speed http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=250496772 171 |
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| DTV004 Regular Member Joined: 30/04/2009 Location: United StatesPosts: 65 |
sorry i thing this okhttp://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&i tem=250496772171&viewitem= |
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| DTV004 Regular Member Joined: 30/04/2009 Location: United StatesPosts: 65 |
okhttp://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&i tem=250496772171&viewitem= SLE-750 ELECTRIC SCOOTER ENGINE CHAIN DRIVE SUNL 
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| Ghetto Newbie  Joined: 01/09/2009 Location: AustraliaPosts: 14 |
Why don't you try what Gizmo said and try 3 blades on your current setup, will run at a higher RPM and therefore return a higher voltage. |
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| DTV004 Regular Member Joined: 30/04/2009 Location: United StatesPosts: 65 |
thaks for reply i was wrong the scooter motor dont work for my wind mill i tested and got to hot berry hot..oso i test with 3 blades and the motor only turn on hi winds,i am working on one BIG alternador from a big machine i star to install the new coil...this alternator have the inside easy to install the magnets you know how regular alternador all the inside parts turn? will this altenador have the coil astable no movment so i pull all the wire out.and install the magnets. yes the right size for the magnets only the outsde will turn not the magnets i will post photos of my progres soon.. |
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| DTV004 Regular Member Joined: 30/04/2009 Location: United StatesPosts: 65 |
ok today i finish the altenador and works great! with two outputs 12v and 24v im happy ...pic. 
nex the model  ok i pull the wire and install the magnets
 ok photos only to make more ease..
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tomorow i will star to make the base for..i have blades from windynation i will try with this alternator .....oso sorry for my english 
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| GWatPE Senior Member Joined: 01/09/2006 Location: AustraliaPosts: 2127 |
Hi DTV004, If you get the chance you will get a better alternator if you make the windings tighter. This will reduce the winding resistance and allow higher output current and lower heating and a higher alternator efficiency. Gordon. become more energy aware |
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| DTV004 Regular Member Joined: 30/04/2009 Location: United StatesPosts: 65 |
hi i try to make the winding more tighter but no space the wire i use is from the same alternator the magnets are now on place. each winding have 16 turns i know needs to be 40 turns but i dont have small wire. and i dont know the size of this wire. to be my frist time i thing is more then good...super good, this mornig i will fix small details. |
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| GWatPE Senior Member Joined: 01/09/2006 Location: AustraliaPosts: 2127 |
Hi DTV004, This is not about wire size. There is a lot of excess wire length outside the slots. The layout of the coils in the slots you have, permits a physically smaller coil, with the same turns of the same wire, only a shorter piece of wire would be needed. Gordon. become more energy aware |
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