Thread Tools
Dec 21, 2010, 08:06 PM
Registered User
Staggerflyer's Avatar
Quote:
Originally Posted by wizprod
If you read the doc for the rpm sensor, this is clearly stated as well
Yes, that document is where I learned it.
Sign up now
to remove ads between posts
Feb 02, 2011, 01:57 PM
John Foltz
jfflyer's Avatar
Quote:
Originally Posted by Moby58
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 02:58 PM.
Feb 08, 2011, 06:39 AM
John Foltz
jfflyer's Avatar
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.
Feb 13, 2011, 09:54 PM
Registered User
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.
Mar 06, 2011, 10:08 AM
Registered User
Dr Kiwi's Avatar
Quote:
Originally Posted by MJRnewb
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.
Mar 23, 2011, 09:31 AM
Team Wack-a-Mole
Melnic's Avatar
Hobbypartz Monster Power .15,25,32,46,60 All 14 pole
Mar 23, 2011, 09:59 AM
John Foltz
jfflyer's Avatar
Quote:
Originally Posted by Dr Kiwi
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 10:13 AM.
Apr 14, 2011, 09:17 AM
Drone offender FA377YHFNC
Turnigy 2217-20 14 poles
May 02, 2011, 07:20 AM
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
Jun 24, 2011, 05:25 PM
ids911
ids911's Avatar
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 08:02 PM. Reason: update
Jul 01, 2011, 09:27 AM
Registered User
Rimfire .60 50-55-650:
12 Stator Poles
14 Rotor Magnets
28 Rotor Poles (always twice the magnet count).
Jul 01, 2011, 11:39 AM
John Foltz
jfflyer's Avatar
Quote:
Originally Posted by brinky
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 11:44 AM.
Jul 02, 2011, 10:25 AM
Registered User
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.
Oct 03, 2011, 07:25 AM
Registered User
NTM Prop Drive 35-36A 1800 10 poles
Oct 07, 2011, 09:10 PM
Registered User
Does anyone know how many poles for NTM Prop Drive Series 35-42A 1250Kv 600W?


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Please Post your Aerial Photos here.... kepople Aerial Photography 264 Nov 21, 2016 10:21 AM
Please Post your Aerial Photos here....See Aerial Photo Forum kepople Aerial Photography 234 Apr 29, 2015 11:29 AM
Please post your Small EPP 3D airplanes Here fly4fun 3D Flying 39 Nov 30, 2005 03:10 PM
Yippee! Please post your links to free plans HERE! CactusJackSlade 3D Flying 12 Oct 08, 2004 01:30 PM
Please post your flight times for brushless Voyager E's Astro30 Electric Heli Talk 4 Mar 16, 2003 06:31 PM