Patent ID: 6346759
Filing Date: 2002-02-12
Classification: H02K

Abstract:
A highspeed motor comprising a stator including a stator yoke made of a soft magnetic material and coils comprising magnet wires wound on a bobbin arranged on salient poles of said stator yoke; a rotor, rotatably arranged on a motor shaft, including a field magnet comprising a permanent magnet so as to face said salient poles of said stator in an axial direction by way of an air gap and a shaft as the center of rotation in the center thereof; and a base plate having a housing which has two bearings for rotatably holding said rotor in the center of said stator, wherein said stator yoke comprises a wound continuous ribbon, wherein each of said salient poles is formed so that an area is formed facing said field magnet wherein a width of said area facing said field magnet is narrow on a motor shaft side, and becomes wider towards an outer circumference of the motor, wherein a protruding portion on said wound continuous ribbon, which serves both to position and to fix said strator, is provided on a side opposite said area facing said rotor and wherein said stator yoke is fixed by way of a portion of said bobbin to said base plate.