To lower the production cost, to efficiently use materials, and to sharply improve concentricity and circularity of the whole stator, after assembled.

This structure comprises stator ring parts, where an end part divides and forms a plurality of equal distant circumferential angles according to the number of stator teeth, a plurality of recessed fitting and inserting vessels are formed for other end parts; the inside vessel width of those fitting and inserting vessels, is formed larger than the width of the opening of the fitting and inserting vessels; stator teeth parts, where teeth root tail ends, are extended outward from the end of the root parts of the teeth parts; the width of the back side of the teeth root tail end is formed smaller than the outside width of its tail end, which his formed to correspond to the fitting and inserting parts of the stator ring part; and both are fitted to and inserted into each other; and a plurality of teeth surface end appears to be an arc surface, and a plurality of insulating wire vessel units.