Single-phase 2-pole electric motor in which main windings and auxiliary windings are mutually offset by other than 90 degrees and mounted in different size slots

Abstract

It is an object to obtain a highly efficient and low-cost single-phase motor by producing the motor in a form that allows a proper material layout, with securing a magnetic path of a coreback of a stator iron core. A stator iron coreformed by laminating a plurality of electromagnetic steel sheets and provided with N slots, where N/2 is odd, a part of which are large slotsand others are small slotshaving a shallower depth in a radial direction; a main windingof 2-pole single-phase concentric winding arrangement inserted to the large slotsor the small slots; and an auxiliary windingof 2-pole single-phase concentric winding arrangement inserted to the large slotsor the small slotsand arranged at a location which is dislocated by other than 90 degrees in electrical angle from the main windingare included, and among the N slots, slots of which the occupying rate of winding is made smaller than others by arranging the auxiliary windingat a location which is dislocated by other than 90 degrees in electrical angle from the main windingare made the small slots, and other slots are made the large slots