Rotor iron core, rotor, rotary electric machine, blower, rotor iron core manufacturing method, and rotor core manufacturing method

摘要

A rotor core, a rotor, a rotary electric machine, a blower, and a rotor capable of suppressing a secondary resistance of a current flowing through a secondary conductor and a secondary leakage magnetic flux between teeth tips of adjacent rotor cores. A method for manufacturing an iron core and a method for manufacturing a rotor are provided. A rotor core 31 of a squirrel-cage rotor having teeth 33 arranged at equal intervals in the circumferential direction, wherein core pieces 35 forming a stack are holes 35Bs serving as slots between the teeth 33. And an opening 35k communicating with the hole 35Bs, which serves as a slot opening 31K in which the slot opens in the radial direction. At least a part of the circumferential side surface of the opening 35k is chamfered obliquely in the axial direction. The plurality of core pieces 35 are axially stacked with a certain amount of displacement in the circumferential direction, and the chamfering direction is the same as the inclination direction of the teeth 33 with respect to the axis C of the rotor core 31. [Selection diagram] Fig. 7