Stator having teeth with a projecting portion extending outwardly from a winding portion and a yoke portion

Abstract

In the field of stators including divided tooth-shaped iron cores and core back iron cores, a stator is provided in which the tooth-shaped iron cores and the core back iron cores can be easily connected to each other, and the tooth-shaped iron cores and the core back iron cores can be prevented from coming off in the radial direction. In the stator of the present invention, a yoke () is formed such that the circumferential width thereof is greater at a radial-outer region than at a radial-inner region, i.e., such that the distance (a) between yoke side faces (A,A) gradually increases from a radial-inner region to a radial-outer region, and the distance (b) between two yoke side faces (A,A) opposing each other and facing a space between the tooth-shaped iron cores () that are disposed along a predetermined circumference with a predetermined interval is set to be a predetermined value over a range from a radial-inner region to a radial-outer region, or alternatively, is set so as to slightly decrease from a radial-inner region to a radial-outer region. A stator () is formed by inserting each of the core back iron cores () into a space between the tooth-shaped iron cores () adjacent to each other. The present invention also provides a stator in which a packing factor can be increased and the magnetic flux can be made smooth, and a manufacturing method therefor.