WEDGE OF ELECTRIC MOTOR STATOR

PROBLEM TO BE SOLVED: To insulate the inside of a slot without increasing the cost by providing a projection-part rib at least at one place at a position in a direction where a wedge is perpendicular to the direction of a core lamination, at the same time, is in nearly parallel with a tooth end face, and projects from the end face of the core lamination. SOLUTION: In a slot, via a slot insulator 4, an auxiliary coil is wound for a plurality of times at a position that is rotated by approximately 90 degrees from a main coil via a slot insulator 4 and then a wedge 6 is inserted. Then, a coil 5 is shaped, and a coil support is tied to the coil with a coil band. In a stator with such configuration, in transportation or operation, the wedge 6 is shifted to a lower end in the laminated direction of the rotor and is rotated in the circumference direction of the bundle of the auxiliary coils, and insulation distance may not be maintained. In this case, a projection-part rib 16 is provided while being perpendicular to the direction of a core lamination, and being in nearly parallel with a tooth end face, thus securely bringing it into contact with a teeth part 18, and preventing extraction in the direction of the core lamination.