Yet another treadmill motor

[Rover]

On a lark I picked up a treadmill motor on ebay...I actaully can use it for a number of differenet things. Motor is in good condition.. and will rotate with a 1.5 v AA battery...can't stop it manually with a 12 volt source

Specs.

Baldor model # MR10235 you won't find anything else about it on the net.

0- 90 VDC

Brushed ( Checked brushed they are fine)

21 AMP

2 HP

2500 rpm

TEFC case (totally enclosed fan cooled)

weighs about 40 lbs

What is unusual is that this is not a 130 to 180v motor at the 2 hp rating, rather a 90v , so finding a power supply at 90V that goes to 21 Amps could be fun if used for anything else other than a generator.

I will mount the motor in test bench, probably this weekend and see what I get out of it... if not to anything useable for a wind gen at 12v, then maybe build a motorized bar stool with it ( with 3 or 4 U1-3 batteries)

Its items like this that keep my wife puzzled why she married me.

[GeeMac]

Well, here's the Baldor site address http://www.baldor.com/

If you contact them maybe they can tell you about the motor.

[Rover]

Yep, been there... also processed motors at the same hp range (at 180 v) ... retail they run about 1,300 $ US (did that before I bought it) .

Actually, all the information I need is on the label, and from the bench tests that I run this wekend.

My fish scale shows this motor at about 34 lbs ... so my test tower may need to be beefed up if I mount it. (I figure I'll be aroun 50 lbs with tail/hub/and blade)

hopefully less...

[Rover]

Going into a battery with a resting voltage of ~12.5 to 12.6 volts

Cut-in 400 RPM

Next are the AMPS/RPM

.1/400

1.5/470

3.5/536

4.9/571

At 571 rpm  battery went to 13.4 v

When graphed and compared to my 1/2 ECM conversion, it appears as though the current could continue to rise at lower rpm for the baldor. The 1/2 ECM amp/rpm curve tends to start flattening out at around the  571 rpm mark (the baldor motor and ECM actually intersect at that point). The ecm cut in is 320 rpm

Unfortunately I need a bigger drive pulley to test beyond 571 in this current test (I did have one when testing the ecm)

[Rover]

Graph of my 2 HP 90 vdc baldor vs my 1/2 hp ECM conversion

[taylorp035]

Your rpm/volt of 27 seems good to me, so you cut in should about 350, roughly the same as mine which I hope to take out tomorrow (my christmas present  .  

How much did you pay?  I found mine for $30, which as you said, some of these run past $1000.

I am putting a 67" diameter blade on mine and I will get back with some results as soon as the wind picks up  (it has been 8 very very very long days because we have had no wind).

The 21 amp rating seems real nice.  Mine is rated for 16.9 @ 2.5 hp.