Patent ID: 8405272

Claim:
A self-starting permanent magnet synchronous motor, comprising: a rotor; and a stator, wherein the rotor comprises: a rotor core; a plurality of slots formed near an outer rim portion of the rotor core at regular intervals; a plurality of conductive bars embedded in the slots; a squirrel-cage winding having conductive end rings for short-circuiting the conductive bars at both edge surfaces in an axial direction of the rotor core; at least one or more magnet inserting holes arranged on an inner rim side of the slots; and at least one or more permanent magnets embedded in the magnet inserting holes, and wherein one side of the permanent magnets is arranged to be a North pole and another side of the permanent magnets is arranged to be a South pole to construct field magnetic poles of the North pole and the South pole; wherein a center axis of the magnetic poles constructed by the permanent magnets is a d-axis and an axis rotated from the d-axis by 90 degrees is a q-axis; and wherein at least one conductive bar is arranged near the d-axis, radially outside the North or South poles of the permanent magnets and at a distance L from the q-axis, and at least one conductive bar is arranged near the q-axis a distance R from the center axis of the rotor, wherein R>L.