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fungus
Junior Member
251 Posts |
Posted - 17/09/2007 : 22:11:12
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I do think the 'stiffness' is purely due to there being such a small airgap on these, under 0.5mm. There is only a very small amount of cogging on these. It still might be good for a vawt with loads of torque.... I opened the case on mine and had a look, its a nice laminated 3 phase winding; for all the components in this you couldnt beat the price :-D
http://www.anotherpower.com/gallery/fungus?page=23 (the last four pictures) |
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windymiller
New Member
United Kingdom
60 Posts |
Posted - 18/09/2007 : 17:14:46
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Hi everyone
Got one on the way also.
1000watts low rpm for 47 quid....bargain
I bet to commission any one to make one of these from scratch would cast a small fortune.
Might end up being a little too big for a project.... But
Sometimes you"ve just have to jump into the deep end and have a go!!!.
Another plus for buying this motor is i feel it might be easier to reduce its power by making small alterations with the type of magnets or the positioning/settings of components within the motor...eg profile of magnets air gaps etc to reduce magnetic flux.
Put me right if im well off the mark.....dont mind you snapping at my anckles a few times im sort of expecting it.......Its called a learning curve.
cheers windymiller...
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Edited by - windymiller on 19/09/2007 07:31:33 |
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gotwind
Forum Admin
United Kingdom
765 Posts |
Posted - 19/09/2007 : 20:03:51
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You can't really go wrong.
As suggested the cost of the parts separately far out ways the motor's price. You could always resell it for the same price or more...
Please be careful when dismantling/inspecting the motor - I am guessing those magnets are the super strong Neodymium type, and they will give you a serious 'pinch' if not handled properly - maybe wear goggles also.
Sorry to sound like the U.K's nanny state government, but it's worth mentioning I think.
The Futures Green - Getwind of it. |
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fungus
Junior Member
251 Posts |
Posted - 19/09/2007 : 20:22:57
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| yes, they are very powerful and I couldnt get it out after half an hour of prying, wedging it out :) but theres not much reason to take it apart. Look at the pics I showed, theres not much to be modified except maybe a rewind if you're ambitious. |
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mikeey01nzl
Starting Member
New Zealand
5 Posts |
Posted - 21/09/2007 : 11:10:00
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Pete aka windymiller great stuff on the e-bike here¡K
This article alone got me hooked on wind. I was going down the solar road till I struck your write up, it swung me ļ
Here I was looking for grid tie inverter technology on a windy site and came across a project that I¡¦m now keen to give ago. Go figure I haven¡¦t even started and I¡¦ve been hit by the bug already!
Bushwacker like what you¡¦ve done and worked out so far on the e-bike motor too.
Regarding these e-bike brushed motors..
You¡¦ve got my attention.
You mentioned you were going to buy one have you?
If I wanted to buy one, any ideas who sells them?
You mentioned an e-bike store ?
I¡¦ve searched the net for two days straight here in nz and we have e-bike stores but they only sell brushless bikes and are reluctant to sell a motor alone!
I don¡¦t fancy getting a whole container of them from china ƒ¼
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windymiller
New Member
United Kingdom
60 Posts |
Posted - 21/09/2007 : 19:58:50
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Thanks mikeey for your appreciative comments.
Cheapest brushed hub ive noticed new is listed on ebay 350watt/500 peak .does not say what voltage is supplied at 500w...probably 48v....list 110171330536 in USA...79 Dollars
Could be geared internally....my feelings is it isnt!!!But check first.
Contact seller before bidding if anybody's interested,and get full info on its construction etc
I do agree with bens comments about internally geared motors ,in that theres more parts to wear out,so less reliable.
Also i think it could be very difficult attaching blades to the hub casing...so think carefully!!!
Stepper motor arrived today...looks very well made.
Very little cogging felt when initially turned ,but Faster rotation did cause high frequency vibration which could cause a nuisance if not sorted outin some way.
Motor stripped down this afternoon ,
Stator to my surprise is already skewed to reduce cogging (brilliant)already,the only solution i can see as an option to reduce vibration/cogging is to alter the permanent magnets in someway.
Im feeling this could be a last option to the problem because of difficulty factor!!!.
Im going to consider a suitable motor mounting solution first.Probably mount it on something which will absorb the high frequency vibration.
Other than that im well chuffed ....next project on the way
ps was a swine to strip down....cover stuck down with gasket seal...bolts loctited
Easy way was to use "jacking bolts" to remove outer cover.
Two cover plate screw holes tapped ot with 6mm tap for this purpose...6mm bolts srewed into cover to lift cover off.
Magnets very powerfull...should be fun re asembling it,ill keep you posted
Cheers windymiller. |
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fungus
Junior Member
251 Posts |
Posted - 21/09/2007 : 23:01:26
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| windymiller-I've found that a blow from a hammer can do wonders with locktite on stuff like this; worked well for them pesky little bolts. As I sadi theres very little cogging, I'm not too sure about the mount? I was thinking maybe a big aluminium block with a 1" hole drilled in it and 3 bolts into the holes? Will like to see what you do with yours.. (PS; its not a stepper motor by any means; its a pretty industrial servo motor) |
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BushWhacker
Junior Member
Canada
255 Posts |
Posted - 22/09/2007 : 07:06:40
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Mikey, Welcome to Gotwind.
You wrote "Bushwacker like what you¡¦ve done and worked out so far on the e-bike motor too.
Regarding these e-bike brushed motors..
You¡¦ve got my attention.
You mentioned you were going to buy one have you?
If I wanted to buy one, any ideas who sells them? "
In order...
I like this much better!
Yes, that is the Ebike hub. Do a search on "Crystal Lite Ebike" and you should round up a motor. Shipping from CA to NZ would be a killer. They are made in China for crying out loud! Rent a canoe and paddle there if you must? *LOL* Have you tried searching Aussie Ebike stores on the net? This hub is rated at 36 volts and 400 watts. (I figure roughly 217RPM)
For anyone interested, the diode mounted on the heat sink is a "85HF60". For some reason I don't think overheating and/or voltage spike will cause a failure. BTW all of the specs are confetti from routing the leading edge (inside) and angling the trailing edge (outside) of the buckets with 2 routers (why keep changing bits?). I killed a bucket setting up one of the routers so I had to make another pair. *GRRRR*
For scale, The work bench thingy is 2 ft wide. The slip mast is 2 1/2 " Diam. This mounts on a 10'6" x 2' diam. mast.
All of the mast is T6061 aluminum. I have the turbine to hub connection figured out and 90% done. this is a fair representation of the kind of work I do for a final product, in my garage, I did rush on the paint though. The tolerances of the turbine shaft mount in relation to the mast being parallel are +/- .002" over 9" for both sides. I have yet to square the motor mount but probably will tomorrow. I expect, and will sweat to get less that 2 degrees deviation from square. The motor mount is slotted to allow movement to and from the mast.
She looks pretty close but that isn't close enough for me. Like I said about the previously posted pictures "It's just a test bed I slapped together".
If you have access to a table saw, drill press, compound sliding miter saw(optional but nice), and whack of other hand, and small power tools, I can put together a photo essay & primer for what I have done. I would prefer Email to conserve Ben's bandwidth, unless Ben wants it all posted.
Cheers!
BW
Everything should be made as simple as possible, but not one bit simpler. - Albert Einstein |
Edited by - BushWhacker on 22/09/2007 07:09:18 |
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mikeey01nzl
Starting Member
New Zealand
5 Posts |
Posted - 23/09/2007 : 03:25:22
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Bushwacker...
Well the info and specs alone swung me from solar to wind.. could one say I prefer to see the electrons get generated rather than imagine them?
I'm listening to any and all re these bike motors, either brushed or brushless to see if they shape up!
I have access to Fisher & Paykel motors as these are thrown away over here!
I also have one of these, any good?
Are these any good for building something up with?
It an old gen out of a model T ford!
yes the coils are still all ok.
Anyone done something with these these before?
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Edited by - mikeey01nzl on 23/09/2007 03:31:07 |
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BushWhacker
Junior Member
Canada
255 Posts |
Posted - 23/09/2007 : 07:15:22
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Mikeey,
With a hope and a prayer mine should be up tomorrow afternoon. Of course the wind won't blow for near enough a week. I think thats a rule with a new turbine going up. *GRRR!*
Wow! Model T parts. I did a fair amount of work on a 27 roadster and drove it and a 26 sedan a few times. Don't go there unless you desire a migraine headache. *LOL*
I met a guy in town who is a model T genius. He makes all of the main bearings for the model T's in the car club he belonged to and assorted other parts. I'll try to look him up as it has been 15 years since I last spoke to him and he was "well seasoned" at that time. If I can find him, he may know more specifics on that unit. I have already sent an email to the club in an effort to find him.
Looking at the first casting I would be worried about balance to start with. Those old thundering 12 HP model T's didn't rev very high from the factory. ;) Still the model T idled around 350 or 400 RPM on a six volt system I believe. Perhaps better magnets would be a good start, but don't take my word for it as electricity just isn't in my skill set.
You wrote I have access to Fisher & Paykel motors as these are thrown away over here!
I have not heard of either motor? Could you post a link showing some specs at least? I'm totally lost on this.
Cheers!
BW
Everything should be made as simple as possible, but not one bit simpler. - Albert Einstein |
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mikeey01nzl
Starting Member
New Zealand
5 Posts |
Posted - 23/09/2007 : 08:24:34
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Fisher and Paykel smart drive motor.
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fungus
Junior Member
251 Posts |
Posted - 23/09/2007 : 14:34:59
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| mikey-the fisher and paykel motors are perfect for wind generators; the guys over at http://www.thebackshed.com/ have lots of information on them. |
Edited by - fungus on 23/09/2007 14:35:24 |
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llerdnaj
Starting Member
United Kingdom
12 Posts |
Posted - 23/09/2007 : 17:41:41
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Saw Ben today he's got a proper full on cold. Everybody say ahhhh!. But still he was out in the greenhouse testing and measuring. the man is a legend. Get well soon bro.
Scoundrel |
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BushWhacker
Junior Member
Canada
255 Posts |
Posted - 23/09/2007 : 18:29:48
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Tea and lemon when people are watching Ben, and when you have a private moment... a shot of green Chartreuse. I consider it a rather vile tasting fluid but it sure does fix your wagon for a while. It goes a long way towards clearing up your sinuses and stuffy head feeling. Only the green stuff works.
Good luck!
Mikeey, It sounds like the Fisher & Paykel motor is a good bet.
I also found an Aussie site here... http://tinyurl.com/yo38k6
If you scroll down a bit you will find "Hub Motors varisous Bargain Bin." for $50 to $250. Not bad in my books.
Contact information is near the bottom of this page... http://www.currietech.com.au/
Please note their regular prices look pretty high to me, even taking into account the exchange rate.
Cheers!
BW
PS. I made a spelling mistake. here is the Crytalyte home page.
http://www.crystalyte.com/
Below the pictures of the bikes and components there are links for contacts in a dozen countries.
Everything should be made as simple as possible, but not one bit simpler. - Albert Einstein |
Edited by - BushWhacker on 23/09/2007 18:52:45 |
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gotwind
Forum Admin
United Kingdom
765 Posts |
 Posted - 23/09/2007 : 19:32:52
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Must admit - I did feel like sh** today, just a cold - nothing stops me tinkering in the shed when I have an idea 
The congestion is easing with each can of beer I drink - well they do say drink plenty when you have a cold.....
Ben.
The Futures Green - Getwind of it. |
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Interesting new source of possible wind generators
