Patent ID: 7579723

Claim:
A stator core prepared by employing a power magnetic core having a start section and a termination section and formed therein with lines of magnetic force extending in a prescribed direction from said start section toward said termination section, the power magnetic core comprising: a plurality of flat soft magnetic particles, each including a major axis and a minor axis, bonded to each other, wherein each of said plurality of soft magnetic particles is so bonded that the extensional direction of said major axis and the extensional direction of said lines of magnetic force substantially coincide with each other, the stator core comprising: an annularly extending yoke portion; and a plurality of teeth portions, protruding from said yoke portion in the radial direction of said yoke portion, provided at intervals from each other, wherein each of said plurality of soft magnetic particles forming said yoke portion is so bonded that the extensional direction of said major axis and the extensional circumferential direction of said yoke portion substantially coincide with each other, and each of said plurality of soft magnetic particles forming said teeth portions is so bonded that the extensional direction of said major axis and the radial direction of said yoke portion substantially coincide with each other, wherein a slot portion is defined in a space enclosed with two adjacent said teeth portions and said yoke portion, and said yoke portion and said plurality of teeth portions include a first portion extending along said slot portion and having a permeability μa and a second portion extending on the opposite side of said slot portion with respect to said first portion and having a permeability μb greater than said μa.