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Feb 03, 2005, 05:20 AM
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hweird's Avatar
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$2.50 AEC DCM-238 Brushless Motor


Just found this on the All Electronics Corporation site: "Bisonic Jouning Series RMB. 12 Vdc (10.2-13.8V), .08 Amp, ball bearing motor. 4000 RPM. Plastic base with metal rotor. Base is 1.45" diameter with two mounting ears. 1.8" mounting centers. Metal rotor is 1.48" diameter. Overall height of motor, excluding shaft is 0.9". 0.12" diameter shaft. 10" leads. Removed from equipment."
http://www.allelectronics.com/cgi-bi...238&type=store
Looks like just two wires attached. Not sure if that is 4000 rpm at 12 Vdc or per volt. Seems like a very low amp number for a 12 Vdc motor. I wonder what kind of stator is in there. What do people think?
Howard
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Feb 03, 2005, 06:34 AM
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If it's like the other motors I've seen, it has a small brushless motor controller on a circuit board inside the base.

It's probably 4000 rpm at 12 volts. They're pretty cheap motors.

Probably has the soft rubbery magnets on the inside rim of the cam, and most likely uses a stator with four winding phases. Most of the cheap brushless motor controllers seem to be designed for four phases because that's what most muffin fans use.

Toshi
Feb 03, 2005, 10:59 AM
I bought a couple hoping to rewind them. But alas, they are 4 toothed stators. Basically its a brushless fan motor without the fins.

Save your $2.50. If you still want to play with them, I'll send you the one I didn't take appart yet, maybe the can and bearings could be used for something else.

-Ted Z
Feb 03, 2005, 07:24 PM
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olmod's Avatar

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you think 3 x4 pole stators = 12 stator teeth mounted on a common bearing holder = 1 stator per phase ummm??
Feb 03, 2005, 08:02 PM
Absolutely olmod. Take 3 separate 4-pole stators, rotate them so they each sit 120 degrees apart, and wind each stator as 1 phase. If you can picture this, mentally compress the 3 stators into one and you're left with a single 12-pole stator. Your magnet configuration would be set up to match a 12-pole stator.

I'll see if I can find the post I was looking at ~ a year ago... Ron, if you're watching, I believe YOU PM'd me the link.
Last edited by ScubaSteve; Feb 03, 2005 at 08:06 PM.


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