Patent ID: 7743483

Claim:
A method of manufacturing a stator in a rotating electric machine, the method comprising: a preparing step for preparing a stator core having plural slots in an inner peripheral surface, each slot of the plural slots has a slot peripheral wall and slot opening that opens in the inner peripheral surface, the slot peripheral wall of each slot has a slot bottom wall and a pair of slot side walls opposing to each other and continuing to the slot bottom wall; a spraying step for spraying a powder of an electrical insulation material on the slot peripheral wall of each slot to form an insulation coating; a cutting step for cuffing into the insulation coating on the pair of slot side walls at vicinity of the slot opening to form a pair of holding grooves opposing each other, each of the pair of holding grooves has a groove bottom wall and a pair of groove side walls opposing to each other; a disposing step for disposing a stator winding having plural winding member such that each winding member of the stator winding is inserted inside each slot; and an inserting step for inserting an electrical insulation member between the holding grooves for closing the slot opening, wherein in the spraying step, the insulation coating is formed over continuously from the slot bottom wall to the pair of slot side walls, and wherein in the cutting step, the holding grooves are formed in the insulation coating on the slot side walls so that a depth of each of the holding grooves is smaller than a thickness of the insulation coating, and the groove bottom wall and the pair of the groove side walls are formed in the insulation coating on the slot side walls.