Question

The stator of a three phase induction motor operates from a supply whose frequency is 50 Hz. Calculate the number of stator poles and total number of slots 1n the stator.

Answer 1

The number of stator poles is

$$p=\frac{2·60f}{n}=\frac{6000}{n},$$

where n - the speed of the motor, the number of rotations per minute, or RPM.

The total number of slots in the stator:

$$s=3mp=3·3·\frac{6000}{n}=\frac{54000}{n}.$$