Patent attributes
In a rotating electric machine that is formed of a distribution winding motor with two slots per each pole and each phase, a stator core includes an air gap of a constant width dg1 between the leading end of a same-phase-intermediate tooth and the outer circumferential face of a rotor core, and an air gap of a width not uniform in the circumferential direction between the leading end of a different-phase-intermediate tooth and the outer circumferential face of the rotor core, with a width dg2 (>dg1) as the largest value. A magnetic circuit having a magnetic resistance higher than that of the same-phase-intermediate tooth is formed at the different-phase-intermediate tooth. By establishing a difference in the width of the air gap such that the number of flux linkages at the different-phase-intermediate tooth reduced by the increased magnetic resistance is substantially equal to the number of flux linkages at the same-phase-intermediate tooth, the electromagnetic excitation applied in directions opposite to each other acquire balance so as to cancel each other, allowing vibration at the stator core to be suppressed.
