Patent ID: 9590480
Date: 2017-03-07
CPC Classifications: H02K

Claim:
1. An electric machine, comprising a rotor equipped with permanent magnets, and a stator equipped with electromagnetic poles; characterized in that the electromagnetic poles of the stator form a plurality of electromagnetic pole groups and that all adjacent electromagnetic poles within the plurality of electromagnetic pole groups are spaced apart at a first electromagnetic pole spacing, respectively, that adjacent electromagnetic poles belonging to different ones of the plurality of electromagnetic pole groups are spaced apart at a second electromagnetic pole spacing greater than said first electromagnetic pole spacing, that each of the plurality of electromagnetic pole groups consists of an even number of electromagnetic poles, that adjacent electromagnetic poles of an electromagnetic pole group are magnetically coupled and linked to each other so as to generate magnetic fields of opposite direction in operation, that all adjacent permanent magnets have a rotor pole spacing, respectively, and that the rotor pole spacing is different from the first electromagnetic pole spacing, when measured in geometric angles, wherein the rotor pole spacing, the first electromagnetic pole spacing and the second electromagnetic pole spacing are defined as angles between centers of the permanent magnets and the electromagnetic poles, respectively, wherein the permanent magnets are alternatingly polarized in opposite directions and the rotor pole spacing between centers of adjacent permanent magnets corresponds to a magnetic phase angle of 180°, and that the second electromagnetic pole spacing between adjacent electromagnetic poles belonging to different ones of the plurality of electromagnetic pole groups, as measured in the magnetic phase angle of the permanent magnets, is 240°.