MAGNETIC INDUCTOR ELECTRIC MOTOR AND MANUFACTURING METHOD THEREFOR

摘要

A first stator core and a second stator ore are configured by arranging core block pairs into an annular shape, the core block pairs being configured by stacking together core blocks so as to be spaced apart axially, each of the core blocks including a core back portion and one tooth, and a permanent magnet is configured so as to be divided into a plurality of magnet blocks that each include: a base portion; one shaft portion that protrudes radially inward from an inner circumferential surface of the base portion; and flange portions that protrude on two circumferential sides from a radially inner end portion of the shaft portion, the magnet blocks being held between the core block pairs such that the base portion and the shaft portion are positioned inside the core block pairs and such that the flange portions protrude circumferentially from the core block pairs.

主权项

1. A magnetic inductor electric motor comprising:
a housing that is produced using a nonmagnetic material; a stator comprising:
a stator core that is configured such that a first stator core and a second stator core that are produced so as to have identical shapes in which a plurality of teeth are each formed so as to have a tapered shape in which a circumferential width becomes gradually narrower radially inward and are disposed at a uniform angular pitch circumferentially so as to project radially inward from an inner circumferential surface of a cylindrical core back are disposed coaxially so as to be separated axially and such that circumferential positions of said teeth are aligned, such that slots are configured into open slots; anda plurality coils that are produced by winding a jointless, continuous conductor wire using a concentrated winding method on a pair of said teeth that face each other in an axial direction of said stator core,said stator being disposed inside said housing; a rotor comprising a first rotor core and a second rotor core that are produced so as to have identical shapes in which salient poles are disposed so as to project at a uniform angular pitch circumferentially on an outer circumferential surface of a cylindrical base portion, said rotor being fixed coaxially to a rotating shaft such that said first rotor core is positioned on an inner circumferential side of said first stator core and said second rotor core is positioned on an inner circumferential side of said second stator core, and such that said first rotor core and said second rotor core are offset circumferentially by a pitch of half a salient pole from each other, said rotor being disposed rotatably inside said housing; and a permanent magnet that is disposed between said first stator core and said second stator core, and that generates field magnetic flux such that said salient poles of said first rotor core and said salient poles of said second rotor core have different polarity, wherein: said first stator core and said second stator core are configured by arranging core block pairs into an annular shape such that circumferential side surfaces of circular arc-shaped core back portions contact each other, said core block pairs being configured by stacking together core blocks so as to be spaced apart axially, each of said core blocks comprising said core back portion and one of said teeth, which protrudes radially inward from an inner circumferential surface of said core back portion; and said permanent magnet is configured so as to be divided into a plurality of magnet blocks that each comprise:
a circular arc-shaped base portion;one shaft portion that protrudes radially inward from an inner circumferential surface of said base portion; andflange portions that protrude on two circumferential sides from a radially inner end portion of said shaft portion,said magnet blocks being held between said core block pairs such that said base portion and said shaft portion are positioned inside said core block pairs and such that said flange portions protrude circumferentially from said core block pairs.