Small dc motor

[mixerman]

I picked up a small dc motor today, it was atcheted to a small motor bike for kids. It dosent have any lable on it. Any thoughts of what I may be able to do with this?

The small motor bike was wired for 24 volts. The motor has 2 wires coming from it. The moter bike is called a Razor.

I did place the moter in my drill press to test for different RPM's , Her's what I came up with:

620. rpm = 4.48 volts
     
1720. rpm = 11.80 volts
      
2340. rpm = 15.5 volts
      

[Flux]

Too fast for wind. You will need a very small prop to reach cut in. Such a small prop won't start in low winds and will capture only limited power in high winds.

If you are in a very windy area then a very fast 4ft prop may get you a bit on good days. PVC props will be too slow even at 4ft.

Could rewind or use a boost converter if you want a labour of love project, if you want results then it is not a good starting point.

Flux

[gizmo]

I did spend a lot of time trying to make these little motors work on a windmill, but gave up. As flux says, they need a very high RPM, and just not worth the effort unless you want to charge a couple of nicads.

http://www.thebackshed.com/Windmill/Oatley-windmill.asp

Glenn

[Bruce S]

mixerman;

 Is it me ? Scoop? or are the RPM #s backwards?

I would believe that the slower RPMs would have a lower voltage output.

You could open the back up and see if it truly is wired for 24V or 2 - 12Vs.

This would make a nice machine for one of Norm's pengens.:-)

Have Fun with it;

Bruce S

[mixerman]

 Its the boards software, maybe! Ill try again.

             620 rpm = 4.55 V

            1720 rpm = 11.80 V

            2340 rpm = 15.5 V

I thought I seen a post where someone geared one of these things to get it to work,I couldent find it. I think that would only make it harder to start though in a light wind , thats about all I would get here.

If I could get 6 V out of it I could charge some of your batterys.

Im not informed about the project your refuring to. did a search found nothing.

The label on the bike says 24V.

[ghurd]

Nice to see some numbers for those motors.  

Took away my temptation to buy one, quick!

I think if the voltage got high enough to charge NiCds, they'd be getting too many amps in a gust.

Or the NiCd bank would have to be huge, which would do much real charging most of the time.

If it's up for a vote, my vote is put that bike back together, sell it,

buy a better alternator.  

G-

[Flux]

Gearing may be possible but even then you would need 5:1 to get within reasonable range for a 6ft prop. I think start up would be poor and I am not sure if the motor would hold the thing down in a reasonable wind. I haven't seen much satisfactory results with geared units.

Flux

[mixerman]

 This company does have some better suited for wind, I have no idea of the expence though!

http://www.made-in-china.com/showroom/szunitemotor/product-listlqOQHYkDgJWI/Windmill-generator-catal
og-1.html

[mixerman]

 I hope im giving the right numbers, was going be the label inside the drill press ,I used the 60 scale.  Just sliped a piece of fuel hose over the motor shaft and a piece of steel fuel line in the other end then chucked up and turned it on , also used a vice grip to  hold in place. Im not going to try it, maybe trade it for motor, it needs batterys a speed control grip is broken, its wired wide open. I dont have the charger either.

[ghurd]

Looks like a reseller (advertising company) more than a factory.

G-

[Bruce S]

I'm with Ghurd and Flux on this one.

Nice bike, IF it were mine :_) I'd get up on line, buy a 5k pot handle for the bike, put it together, charge the batteries as individual 12Vdc and put it back up.

With decent batteries it should fetch twice what you'll have in it.

If you were close enough, I'd come "take it" off your hands :-)

Google search for Norm, he's got tons of data and pics on his pedgen.

OF drop him a ? here, he''l see it and should reply quickly.

He's become a guru on these & re-purposeing those NiCds .

Bruce S

[mixerman]

Thanks for the link. That will save me some time, I do like the small pump, I have use for somthing like that. Thanks for your input.

While I was at the site I did some reading in the fourms section, I see the F&P motor is favored downunder! Can you or anyone reading this tell me how common these appliances are in the US? It sounds like thay are here but is this like looking for a Holden in a US junk yard?

[gizmo]

Hi Mixerman

Yeah here in Oz the F&P is a common choice for windmills in the 100 to 400 watt range, depending on your wind conditions. They do have limits and losses, but are easy to find in Australia, dirt cheap and tough as nails.

Randys Workshop is an American windmill site with stocks of the F&P if your interrested http://www.watchtv.net/~rburmeister/

Speaking of Holdens, did you know the Pontiac G8 is actually a rebadged Australian designed and built Holden Commodore we export to the USA. Engine is all American though, we just tuned it up a bit

Glenn