Patent ID: 6441524
Filing Date: 2002-08-27
Classification: H02K

Abstract:
A rotor for a synchronous motor, comprising:a rotation shaft provided in the center of the rotor and rotating together with the rotor; a plurality of magnets, each magnet having V-shaped cross-section, the V-shaped cross-section being defined by an inner V-surface having an acute angle point, an outer V-surface having an acute angle point and an outward face facing outwardly and connecting the inner V-surface and the outer V-surface, each of the magnets being disposed to cause the acute angle points of the inner V-surface and the acute angle point of the outer V-surface to be directed towards the rotation shaft, being magnetized to cause the inner V-surface and the outer V-surface to have a different polarity, and having dimensions to cause a second angle &bgr; to be greater than twenty percent of a first angle &agr; wherein the first angle &agr; is an angle subtended between a first straight line connecting an intersection point of the outer V-surface and the outward face and the center of the rotor and a second straight line connecting the center of the rotor and the acute angle point of the outer V-surface, and the second angle &bgr; is an angle subtended between the first straight line and a third straight line connecting an intersection point of the inner V-surface and the outward face and the center of the rotor; and a core made of a magnetic material which is fixed to the rotation shaft to retain the magnets.