Author Topic: Would like a little help (Read 7257 times)

who8myrice · « **on:** July 13, 2006, 01:55:17 AM »

hey, i was wondering if this might be a good motor, im new to this type of stuff and i just wanted to ask the pro's

its 1000 watts, so even at a lower RPM i can probably crank out 150-200 watts

also, what do you think about using ceiling fan blades for the blades? i dont have access to any sheet metal, only wood, and im not a great craftsman

link to motor:

link

kurt · « **Reply #1 on:** July 12, 2006, 08:08:21 PM »

you would have have to spin that motor to about 1000rpm to get 12v out of it so it is not a good choice for a wind gen. look for a 90v 1750rpm motor or a 180v 3000rpm motor or get a 30 or 40v amatech tape drive motor if you want something in the 4' range.

who8myrice · « **Reply #2 on:** July 12, 2006, 08:14:15 PM »

how about this one?

http://cgi.ebay.com/2-5HP-130V-Treadmill-DC-Motor-Wind-Generator-New_W0QQitemZ120005781066QQihZ002QQ
categoryZ26226QQssPageNameZWDVWQQrdZ1QQcmdZViewItem#ebayphotohosting

JW · « **Reply #3 on:** July 12, 2006, 08:21:19 PM »

who8,

"hey, i was wondering if this might be a good motor, im new to this type of stuff and i just wanted to ask the pro's"

First off, I can tell you that your reference to a specific motor doe'snt help much. If you'll notice much of what's celebrated here is a homemade alt. ,with some magnets en stuff through'n togther(sp?).

Most here, manufacture there own genny's And it works pretty good.

"its 1000 watts, so even at a lower RPM i can probably crank out 150-200 watts"

Uknow there are these rumors that a ac syncronys induction motor will generate its full output, at 10% greater than its rated rpm. BUT I DIGRESS, this is often not an indication of HOW IT WILL WORK IN-REVERSE, electron[theory] and inerta wise...

NOW,

We have some innocent fellow who wants to get the inverse of the rated wattage from some pelter-junctions, What happens here folk's, some new-bee gets offended. OR perhaps not...

"also, what do you think about using ceiling fan blades for the blades? i dont have access to any sheet metal, only wood, and im not a great craftsman"

Yes, Yes, We understand my friend,

In theory,,,

All i cant say to this is TSR and root-tip etc.

Quite frankly wood is a much better material to work with, so dont sweat it dude.

" and im not a great craftsman"

Also, this is ok.

Perhaps if you looked in the diary's sectoin and did a search on "whale fin humps" You might be able to figure out what exactly im talk'n abooot.

Welcome to the forum...

JW

kurt · « **Reply #4 on:** July 12, 2006, 08:45:21 PM »

this one would have to probably spin about 650rpm to get 12v still not good you are looking for between 200 and 300 rpm cut in to calculate approximately were a motor will cut in and start charging take rpm/volts*12 that will give you the approximate rpm that it will cut in at.

who8myrice · « **Reply #5 on:** July 12, 2006, 09:02:30 PM »

ok, then im kinda outta idea's

i dont know the RPM formula's and such, and so now im just going to flat out ask you, what would be a good motor that could bring in around 200 watts at 300-350 RPM's that doesnt cost $500?

JW · « **Reply #6 on:** July 12, 2006, 09:03:50 PM »

Hi Kurt,

I found it very relevant that you mentioned a 4 foot machine(blades). Clearly this is a good starting point from the standpoint of any amature. And higher speed in nature as well. Regardless of the genny used. a ceiling fan is 4' in diameter after all. Anyone scanning the board/forum would not notice that ' denotes feet in inches. and " denotes inches. such as 10" inches is expressed this way. And 10' feet is expressed this way. Sometimes its good to trudge thru the obvious. Because everyone will tell you- I knew that...

JW

kurt · « **Reply #7 on:** July 12, 2006, 09:12:44 PM »

try this one http://cgi.ebay.com/AMETEK-Permanent-Magnet-DC-Motor-Wind-Generator-40VDC_W0QQitemZ290006776913QQihZ
019QQcategoryZ3240QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

put a 4' wood prop on it and your good to go.

coldspot · « **Reply #8 on:** July 12, 2006, 09:25:09 PM »

Look at the RPM's of the motor

With wind, you should be looking for lower RPM's

I've been that route last summer

But the day after I bought a "Tread mill motor", (Whole thing for $4.00)

I also picked up a Ametek 30 VDC, (localy, $20.00)

before they were tried, I got on E-bay a 24 Vdc servo motor, ($37.00 w/ shipping)

And a CMI stepper motor, E-bay also was only $0.99, (Shipping was $25.00)

When I got to test flying these motors

Tread mill wouldn't start with ceiling fan blades, (BAD windmill motor){off size shaft also)

Servo motor has flown many times with many blades and wouldn't get

over about 2-6 VDC, (BAD windmill motor, {RPM}).

But,

The Ametek has flown since last fall with ceiling fan blades,

Did loose a set to 70+ MPH winds.

Tried many quicky blades after that and have it back up ceiling fan blades again.

(Only 3 with stock pitch and many 20" long)

This set-up works pretty good on VERY short test tower. (13')

The $0.99 stepper @ 28Lbs was stripped of controls and tested as a AC type windmill

using only the stuff I left inside plus 3 Bridge Rec's to get DC

Testing with a coffee cup size AC motor duck taped shafts together,

got 112 VDC with no load

Tested with 5 ceiling fan blades about burst a dome light bulb and because I was only holding it with meter also about scared me off of windmills, (because learning about how strong a tower needs to be the hard way is UNSAFE to say the least), lol

Welcome to the site

The search buttons are your cheapest and quickest way to windmill power!!!!!!!

richhagen · « **Reply #9 on:** July 12, 2006, 11:05:30 PM »

Hi, I have a 500Watt motor similar to the one you were looking at at first. In addition to the other comments, when comparing it to my tape drive motors it cogs (has spots that are hard to spin when you spin it around) much more than a similar tape drive motor. I have not, and do not plan to try it on a wind turbine. Many of the Ametek Tape Drive motors are very common to convert to wind turbines. I have two of the 961510-201 rev. E motors that I am using to compare blades.

The motors usually sell for around $35 or so on E-bay, and matches up fairly well to a 4 foot diameter TSR 5 - 7 blade set.

who8myrice · « **Reply #10 on:** July 13, 2006, 07:48:26 AM »

when you used the ceiling fan blades, did you use the metal mount that they come with to build it? or did you take that mount off and just screw the blades on?

who8myrice · « **Reply #11 on:** July 13, 2006, 07:50:06 AM »

what did you use to attatch the blades to the motor?

who8myrice · « **Reply #12 on:** July 13, 2006, 08:05:08 AM »

is there any chance you could post a pciture of your windmill with ceiling fan blades? it would help a ton!

richhagen · « **Reply #13 on:** July 13, 2006, 12:11:33 PM »

Mounts like the one in the photo were made from a block of aluminum I think it was 1.5" by 2" bar stock. I cut off a section to make the blocks carefully using a carbide blade on a table saw. Next the 5/8" or so hole was drilled for the motor shaft so that the shaft fit in snuggly. Then the blade was adjusted on the table saw to slot the block through the hole for the shaft as you can see in the photo. Next holes were drilled for two bolts perpendicular to the hole for the motor shaft so that it can be drawn tight. The half on one side of the slit is drilled larger so that the bolt can freely slide in it, and the other half is threaded. I used 1/4 - 20 tap, and an appropriately sized bit. On the facing end where the blades are at I used three 1/4-20 holes drilled and tapped, and evenly spaced about the largest circle where I could fit three holes evely spaced upon the face of the aluminum block. Although not a perfectly balanced mount, Once I bolt the plywood sandwiched blades to the motor, I balance the whole assembly, using screws, washers, and weights, usually, whatever I have available that I can firmly attach. Rich

who8myrice · « **Reply #14 on:** July 13, 2006, 02:39:15 PM »

with this 40VDC motor would it be possible to get a little over 12v and over 100 watts at 300-350 rpm's?

who8myrice · « **Reply #15 on:** July 14, 2006, 11:34:30 AM »

I have checked every site, googled it, and used the search function here, but i cannot figure out where to find a good 10-20 amp diode, or how to wire it to my system. Do i connect both the wires coming from the windmill to the diode, and then run a different set of two more - and + wires from the other end?

who8myrice · « **Reply #16 on:** July 14, 2006, 12:31:12 PM »

I think im going to copy your idea for the mount, if thats alright, only Im going to try and use wood, and make ait a little wider and longer.

ghurd · « **Reply #17 on:** July 14, 2006, 12:50:07 PM »

The cheapest, simplest, easy to get solution is a 'bridge rectifier'. $2~4 for a surplus 200~1000V 20~35A.

They have a nice package for using a heat sink and can be used at somewhat nearer their amp rating when using 2 of the diodes in the package in parallel, which I would not do with a standard diode.

The windmill positive goes to BOTH of the "AC" or "~" terminals. The "+" connection goes to the battery + terminal.

I will let someone else explain the finer details of diode or bridge connections, but use a big heat sink just in case.

G-

coldspot · « **Reply #18 on:** July 26, 2006, 05:33:43 PM »

click on my used name and then click my files

or click on my stories and look for anything, "Ametek"

PS: yesterday I saw it putting out over 20 VDC

So I hooked to a battery, (12V DC watercraft type)

I let charge on this a couple of hours while the wind

was really blowing, (way to hard for my anometer to read it)

Quessing about 30+ MPH

News:

Author Topic: Would like a little help (Read 7257 times)