# How is motor pole count calculated?

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## What is pole count?

Manufacturers define their pole count by the number of pole pairs or stator windings. Increasing the number of pole pairs on the rotor itself (or adding more stator phases) increases resolution. … Rotation step angle is half that of a permanent-magnet stepper motor with the same number of stator windings.

## What is an 8 pole motor?

First of all think of a DC Motor. If it is an 8-pole motor is will have 8 field coils evenly spaced all the way around it. Now, in an AC Motor with 3-phases you will have the 8-poles 3 times. That means you would have 24-groups of coils.

## What is a 4 pole 3 phase motor?

With a 4-pole machine, the rotor will move from 1 pole pair to the next in 1 AC supply cycle, so will do half a rev in one supply cycle – the synchronous speed is therefore 50/2 revs per second, or 1500 rpm. A 4-pole induction motor will have a nominal speed of 1450 rpm or thereabouts.

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