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Forum Index : Windmills : Could this engine be suitable..
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pierre Newbie  Joined: 14/11/2006 Location: SwedenPosts: 3 |
Got myself two different electrical engines. The largest one is from a water pump in the ring on the picture. Output is around 900watts (220 volts.) and its very high rev's on this one. However its easy to pull around so maybe I could gear it. My question is, is the engine suitable other then the high-rev fact? I can't find any "coals" on it so I'm guessing its a brushless engine? It has got 4 connectors, would it be easy enough to just simply use the rectifyer thought on the article: http://www.thebackshed.com/Windmill/articles/AlternatorRect. asp ? Could I test the engine/generator without having to buy the rectifiers, perhaps by only connecting one of the three phases? Thoughts? [IMG]uploads/pierre/2006-11-14_103224_719920_b.jpg[/IMG] I also have a electrical engine from a drying machine that's also 3 phase and does not seem to have any brushes. Samt 3 phases, is it possible to test this one without adding any electrical components? I just would like to test the engine/generator with a multimeter or so in order to see if it returns any glit of power when I have a drillingmachine on the axle. |
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| pierre Newbie Joined: 14/11/2006 Location: SwedenPosts: 3 |
Correct image link.  |
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Gizmo Admin Group  Joined: 05/06/2004 Location: AustraliaPosts: 5078 |
I think what you have there are induction motors. To turn these into generators for use on a windmill you need to add magnets. This is done by machining down and gluing magnets to the armature. Do a google search for... induction motor conversion windmill Hope that get you headed in the right direction. Glenn The best time to plant a tree was twenty years ago, the second best time is right now. JAQ |
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| pierre Newbie Joined: 14/11/2006 Location: SwedenPosts: 3 |
Allright, seems like a simple solution. How would I connect it once a permanent magnet conversion is done? It seems to have four connectors at the moment. two are going to the 220v AC input and two are connected to a cylinder electrical component. Should I short these two connectors together and remove the "cylinder" electrical component and simply use the two cables that got input 220v AC before to measure any output? |
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vawtman Senior Member  Joined: 14/09/2006 Location: United StatesPosts: 146 |
Hi pierre The one you have circled is more than likely a 2pl motor and not a good candidate for a conversion. You can bypass the start capacitor has you stated but would take over 3000rpms to reach close to its rated output. Its a single phase motor 3 ph would be better with a low rpm rating. Are you driving it with the wind? The dryer motor is probably 4 pl would be better.Have a look at the rated rpms on the motor(engine). Have a good time. |
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| KiwiJohn Guru  Joined: 01/12/2005 Location: New ZealandPosts: 691 |
Hi Pierre With four wires two of which go to a cylindrical object I can only imagine that what you have is a variety of split phase induction motor of which there are about 3 or more types. I think this motor is a poor candidate for use as a generator on a windmill system. There are ways of using induction motors such as split phase and your 3 phase motor as generators but all the methods I know require steady RPM which might be OK if you are using hydro or internal combustion engines to drive it but not easily achieveable on a wind system. How many wires does your 3 phase motor have? If it has six you could use your meter to find one pair and put DC battery power on that then spin the motor in your drilling machine. I really doubt the result would be useful but I think you should see some AC voltage on the other pairs when you do that. You will need to restrict the current through the battery and coil and I suggest putting a light globe in series to do that. |
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