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Old Dec 21, 2010, 09:06 PM
Staggerflyer is offline
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Quote:
Originally Posted by wizprod View Post
If you read the doc for the rpm sensor, this is clearly stated as well
Yes, that document is where I learned it.
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Old Feb 02, 2011, 02:57 PM
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John Foltz
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Quote:
Originally Posted by Moby58 View Post
E-Flight Park 480 BL 12 poles
We need to be clear about all the different "480" motors sold by Horizon Hobby.

I'm almost positive that the 480 and 480BL brushless outrunner 960Kv have 14 poles/magnets. This is from a "feel" test with the ESC brake on, but others claim to have disassembled the motor and confirmed it, as posted in these forums. The motor has 12 stator arms, but 14 magnet poles, which is a common combination for high-torque brushless motors.

A version of this 480 960kv motor comes in a whole bunch of Parkzone planes. The reverse-shaft version comes in the Radians.

There are other "480 size" motors sold by Parkzone and E-Flite, but I'm referring to the 960kv ones. I know there is an E-Flite 1010kv one that says 12 poles on their web site, and they also have a 4000kv one that says 6 poles. These are all 480 size motors, which is a loose designation of the physical size.

Here's what a brushless outrunner looks like. The pole count is the number of magnets in the outer shell. It will always be different than the number of arms on the stator.



This is a 14 pole motor, but it has 12 stator arms and 6 coils. It isn't the Parkzone motor, just an example image I found that is very close to it.
Last edited by jfflyer; Feb 02, 2011 at 03:58 PM.
Old Feb 08, 2011, 07:39 AM
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John Foltz
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I've confirmed this RadianOne and RadianPro motor:
480B BL Outrunner Motor; 960Kv Reverse Shaft

has 14 poles. Also, with the propeller and adaptor removed (down to the bare shaft) I get about 935kv out of it (11,395 RPM @ 12.2V) using the stock ESC. It's rated at 960 so that's pretty close.
Old Feb 13, 2011, 10:54 PM
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The Turnigy Typhoon 500H Heli Motor 1800kv (500 Class) has 6 poles/magnets. Not sure how many stator arms but it does have six magnets.
Old Mar 06, 2011, 11:08 AM
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Quote:
Originally Posted by MJRnewb View Post
The Turnigy Typhoon 500H Heli Motor 1800kv (500 Class) has 6 poles/magnets. Not sure how many stator arms but it does have six magnets.
I think it has to have 9 wound stator arms... 6-magnets or 12-magnets work with 9-arms.
Old Mar 23, 2011, 10:31 AM
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Hobbypartz Monster Power .15,25,32,46,60 All 14 pole
Old Mar 23, 2011, 10:59 AM
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John Foltz
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Quote:
Originally Posted by Dr Kiwi View Post
I think it has to have 9 wound stator arms... 6-magnets or 12-magnets work with 9-arms.
So does any other even number in a reasonable range. In outrunners, 9-arm stators come with every even number from 6 to 16 magnets, maybe others too. I don't think you can make any assumption.
Last edited by jfflyer; Mar 23, 2011 at 11:13 AM.
Old Apr 14, 2011, 10:17 AM
Rockin Robbins is offline
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Drone offender FA377YHFNC
Turnigy 2217-20 14 poles
Old May 02, 2011, 08:20 AM
seaking63 is offline
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Fly Crash Repair and Fly again
both outrunner motors Esky 3100kv(400 class) & Esky 3900kv(400 class) have 6 magnets with 9 coiled stator arms
Old Jun 24, 2011, 06:25 PM
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Anyone know the pole count for a Torque 22T/930 motor?
found out from mfg: 12 pole
Last edited by ids911; Jul 01, 2011 at 09:02 PM. Reason: update
Old Jul 01, 2011, 10:27 AM
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Rimfire .60 50-55-650:
12 Stator Poles
14 Rotor Magnets
28 Rotor Poles (always twice the magnet count).
Old Jul 01, 2011, 12:39 PM
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Quote:
Originally Posted by brinky View Post
Rimfire .60 50-55-650:
12 Stator Poles
14 Rotor Magnets
28 Rotor Poles (always twice the magnet count).
No. Rotor poles = magnet count. If you set it the way you describe then the sensor is showing you half the actual RPM.

And stator arms isn't relevant for configuring an RPM sensor.
Last edited by jfflyer; Jul 01, 2011 at 12:44 PM.
Old Jul 02, 2011, 11:25 AM
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Oops. You're right, John. I was thinking of magnetic poles, rather than the number of poles the stator sees. The motor only sees the inside pole of the magnet and the outside poles (ie. where the magnet is glued to the rotor) are ignored. Thanks.
Old Oct 03, 2011, 08:25 AM
Geni is offline
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NTM Prop Drive 35-36A 1800 10 poles
Old Oct 07, 2011, 10:10 PM
habu2010 is offline
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Does anyone know how many poles for NTM Prop Drive Series 35-42A 1250Kv 600W?


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