Three phase electrical machine having at least 28 poles

A three phase electrical machine has a rotor having a plurality of pole pairs; a stator having a plurality of teeth separated by slots, and a three phase winding arrangement on the teeth, the winding arrangement having one winding per tooth; wherein: A) the number of poles on the rotor is an integer greater than or equal to 28; B) the number of stator windings/slots per pole per phase (Spp) is within the range defined by :- ```1/(3n+1) < Spp < 1/(3n-1), where n is an odd integer selected from 3,5,7,9 and the value of Spp does not equal to 1/3n, and C) the fundamental winding factor Kw1> 0.866.