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Old Dec 23, 2007, 08:31 PM
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joel63's Avatar
United States, TX, Irving
Joined Sep 2007
491 Posts
Question
How many poles?

I have several of the MP Jet 28/7-35D outrunner's and am wondering how many poles these have. When turned slowly I can feel 12 'cog's' so I'm guessing they are a 12 pole motor??
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Old Dec 24, 2007, 06:09 AM
homo ludens modellisticus
Ron van Sommeren's Avatar
The Netherlands, GE, Nijmegen
Joined Feb 2001
10,575 Posts
Not necessarily.
Are you talking about statorpoles (teeth) or magnetpoles?
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Old Dec 25, 2007, 01:50 PM
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joel63's Avatar
United States, TX, Irving
Joined Sep 2007
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I'm fairly new to electric power, so not sure. Reason I ask, when setting up my jeti spin 22 it ask's how many poles so RPM readings show correctly.
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Old Dec 25, 2007, 02:07 PM
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Old Dec 25, 2007, 02:08 PM
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I imagine that the Spin 22 needs to know the number of magnets.
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Old Dec 25, 2007, 02:13 PM
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COPA's Avatar
United States, CA, SF
Joined Mar 2005
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MP Jet 28/7-35D outrunner's

This outrunner has 14 magnet poles. You can see them by looking at the motor from the front. The number of magnets (poles) is the number Spin ESC needs to calculate mechanical RPM. It can only measure electrical RPM.
Merry Christmas!
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Old Dec 25, 2007, 02:42 PM
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Thanks COPA !
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