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Old Dec 13, 2012, 08:46 PM
Mark Harrison
USA, CA, Piedmont
Joined Jun 2010
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Motor nomenclature: what's a 2212?

I realize this varies by supplier, but how does motor numbering work?

i.e., what does the 2212 stand for in each of these motors:

http://montorc.com/DYSA221215.aspx
http://montorc.com/DYSA221206.aspx
http://montorc.com/ipower2212Q.aspx

and what does the 06, 15 numbers mean?

I understand the KV ratings.
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Old Dec 13, 2012, 09:00 PM
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United States, GA, Grayson
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I'm also interested in the answer to this.
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Old Dec 13, 2012, 09:07 PM
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The 2212 most likely means 22 mm diameter x 12 mm depth, and the 6 and 15 probably refers to turns per tooth. More turns generally equate to a lower Kv. Some motors also have a designator for Kv. The nomenclature varies among manufacturers. A motor's weight, Kv and sustained current rating are more meaningful indicators of capability.
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Old Dec 13, 2012, 09:10 PM
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The 2212 most likely means 22 mm diameter x 12 mm depth

STATOR diameter and depth.... not overall diameter and length.. for a 2212 that would be ~2826 [when talking about external measurements].

As whitecrest says 6 and 12 refer to # of turns.. for Suppo.........2212/6 will be ~2200Kv, 2212/12 will be ~1100Kv, 2212/15 will be ~920Kv

2830 external equates to 2217 stator.
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Last edited by Dr Kiwi; Dec 13, 2012 at 09:21 PM.
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Old Dec 14, 2012, 06:17 PM
Mark Harrison
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That's great information, thanks.

Is there any direct correlation between the stator dimension and kvm?
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Old Dec 14, 2012, 09:23 PM
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Quote:
Originally Posted by marhar View Post
That's great information, thanks.

Is there any direct correlation between the stator dimension and kvm?
Not really.. Kv is dependent on number of turns, winding termination (delta or wye) and number of magnet poles. I'm not a motor winder, but length of stator might be a factor????
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Old Dec 14, 2012, 11:27 PM
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For a given turn count and wind scheme, stator height is approximately inversely proportional to Kv. If you have a motor with a Kv value of 1000 RPM/V and you double the height of its stator (changing nothing else), you'll end up at about 500Kv.

You can see this effect easily with the Suppo line: A 2212/6 has a stator height of 12mm and Kv = 2200. A 2217/6 is almost the same build (just has a thicker shaft) with a 17mm tall stator and its stated Kv value is 1500. 2200/17 = ~129, and 1500/12 = 125. Pretty close, especially given that the stated Kv values are only accurate to within a few percent of the real-world number.
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Old Dec 15, 2012, 10:05 AM
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Thanks for educating a geologist in matters electrical! Hey, at least I had a vague idea about it.
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Old Dec 16, 2012, 01:38 PM
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Yes Doc, length does matter.
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Old Dec 16, 2012, 03:59 PM
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Not so much in golf... even at 65, I can drive the ball well enough, such that my playing partners make me hit from the back tees, while they hit from the Senior's... but my short game needs work!
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Old Dec 16, 2012, 05:43 PM
Harry from Atlanta, Ga.
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Quote:
Originally Posted by Dr Kiwi View Post
I can drive the ball well enough, such that my playing partners make me hit from the back tees, while they hit from the Senior's...
it's not the size of the club, it's your performance that counts....

Harry
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