ROTARY ELECTRIC MACHINE AND CORE THEREOF

摘要

PROBLEM TO BE SOLVED: To enable an increase in tightening force in the direction of lamination in the core of an electric rotary machine and uniform cooling for laborsaving in manufacture and maintenance.

SOLUTION: A rotary electric machine core is obtained by laminating electromagnetic steel plates 16 in the axial direction. Multiple slots 20 arranged at equal intervals in the circumferential direction are formed in each electromagnetic steel plate 16 and a tooth portion 21 is formed between adjacent slots 20. Multiple spacing pieces 23 for ventilation are arranged between adjacent electromagnetic steel plates 16 and radial ventilation passages 24 are formed between spacing pieces 23 for ventilation. Each spacing piece 23 for ventilation includes a radial part 23a extended in the radial direction along a tooth portion 21 and a bent part 23b connected to the radial part 23a and bent along a plane perpendicular to the rotation axis in a position shifted in the radial direction from the tooth portion 21. The spacing pieces 23 for ventilation are identical in dimensions and shape and bent in the identical direction.

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