Patent ID: 9692269
Date: 2017-06-27
CPC Classifications: H02K

Claim:
1. An electric machine comprising: a stator comprising permanent magnets that have a same polarity in depressions between adjacent stator salient poles of an iron core, the iron core comprising a plurality of stator salient poles; and a mover configured to move while facing the stator, the mover comprising an N (a number of power phases) multiple number of teeth and phase windings, each of the phase windings wound around a corresponding one of at least some of the teeth, wherein the mover includes a plurality of phase winding groups and is configured such that a plurality of phase windings are included in a phase winding group for each of N phases, wherein adjacent phase winding groups within the mover are arranged such that a separation distance (α) between the adjacent phase winding groups electrically has a difference corresponding to a phase angle of 180/N°, wherein the phase windings of the mover include phase windings for three phases U, V, and W and phase windings for three phases /U, /V, and /W having a phase difference of 180° with respect to the respective three phases, wherein the mover comprises a first phase winding group including phase windings for the U and /U phases that are disposed alternately and adjacent to each other, a second phase winding group including phase windings for the V and /V phases that are disposed alternately and adjacent to each other, and a third phase winding group including phase windings for the W and /W phases that are disposed alternately and adjacent to each other, wherein an odd number or even number of phase windings for the U and /U phases, among the phase windings included in the first phase winding group, are connected in series, an odd number or even number of phase windings for the V and /V phases, among the phase windings included in the second phase winding group, are connected in series, and an odd number or even number of phase windings for the W and /W phases, among the phase windings included in the third phase winding group, are connected in series, and wherein the mover comprises the teeth, adjacent teeth being arranged at a regular interval of δ, and δ is determined by δ=(N