Scooter DC Motor

[fukenfooser]

"Kollmorgan 24 Volt 300W Brushless DC Electric Motor NR"

I have been looking at these on E-Bay and wonder how good a gen they could make?

[fukenfooser]

I also have been wondering about the "Trolling Motors" for Boats?

I have a couple, three and might have to one day try out the oldest one,

(would require removing from bow of boat in storage), but do have two here

in storage under house, one I could definatlly play with, (salvaged from dumpster

as Boat dealership I work at and missing part of Bow mount set-up, but equall in power to one on my boat. 42Lbs thrust @ 12VDC)

Anybody played with any of these yet?

l8r

[drdongle]

What are the specs on the motor RPM?

[pyrocasto]

I cant find any, but I'm guessing ~2500 or so. Which means youd have to belt them up. I wonder how much power that is for an electric bike? I've heard 500w is the largest legal limit in the US(not sure) but the 600w one looks great for my electric bike.

[hiker]

here you go-----

                scootersupport.com/motorrewind.htm

[Nando]

The motor has about 2250 RPM rate for 24 Volts input.

It is a brushless motor which indicates that it may be 3 phase unit.

I called the company that was placing them in Ebay, direct buy from them around 35 dollars.

One can remove the cover and the controller and add diodes to get the DC out, with 300 watts, it may produce that power level at around 2400 RPM.

The wiring shown in another message for this thread is not right for a 3 phase wiring.

One can use it for a bike or scooter and the direction of rotation maybe changed by doing some circuit change or rewiring, the same model is used in some other products with opposite rotation , therefore I presume that the controller may have an internal jumper to do the rotation changes.

Nando

[asheets]

I was told when I investigated this that the shaft/bearing durability might make it troublesome for gen work, in addition to the bad voltage/rpm ratio...

[dinges]

Hi,

A week ago I found an old electro-scooter and stripped it. One of the 4 magnets in the motor had come loose, thus blocking the rotor; causing overcurrent, burning the brushes (smell!), blowing the electronics, ruining the batteries (2*12V/12AH :-( ), which I was really interested in. Oh yeah, some wiring had melted too....

Anyway, on opening the motor I found the cause: one magnet had come loose. I've reglued it and fixed the brushes. The front bearing is dead (608Z; 8 mm ID, 22 mm OD), but is easy to replace (price of a bearing?).

It says 24VDC 14Amp 2750 RPM 250W on the label.

Connected it to 12VDC just a few hours ago (before I read this post; that's why I remember all those numbers) and it spins very slow, about 300 RPM? DOn't know what 24V would do, but I don't think anywhere near 2750RPM.

The idea I had was putting it on an exercise bike, to generate a little power. However, I can make the pedals go round at 80RPM; to go to 2750 RPM would mean a very high gearing-ratio.

I'll see if I can find a new bearing for not too much money, and see what this motor does at about 500RPM on the exercise bike. Don't think I'll hold my breath, though. I'd be amazed if useful voltage/power came out of it.

Oh yeah, I did give a bit of a spin by hand; about 1Vopen, Ishort some 100mA; I couldn't spin it very hard, because my hand hurts on the tooth-gear (term?).

I'll keep youse informed if anything good comes out of it,

Good luck with yours,

Peter (The Netherlands)

[fukenfooser]

Hello Pete-

I have given up on this Idea.

Because I bought a Ametek 30 VDC stepping motor. Posted in my diary.

"tooth-gear (term?)." Sprocket    ( used with chains)

Gear used with gears

Pully used with belts

Have fun with yours

Thanks

ff

[dinges]

Just found something interesting; check out www.thebackshed.com

He has used exactly the same motor as I have (MY1016/MY1018). It's the motor from Oatley electronics, bought in Australia for 36$.

He hasn't been very succesful either (max. voltage as windmill was about 5V). He also experimented with DC-DC converters, with mixed succes.

Grtz,

Peter.

The Netherlands