Permanent magnet embedded motor and pump device
AssigneeMikuni Corporation
InventorShin Suzuki
Life of this patent
Estimating the term…
Abstract
A permanent magnet embedded motor includes: a stator of an annular shape; a rotor, arranged inside the stator, including a rotor core and a permanent magnet, and rotating about a predetermined axis. The rotor core includes an insertion hole arranged in a circumferential direction and a filling part provided adjacent to the insertion hole for filling with an adhesive. The permanent magnet is inserted into the insertion hole. The insertion hole includes a wall surface to which the permanent magnet adheres. At one opening end of the insertion hole, the filling part is of a shape obtained by cutout in a stepped-down manner in an inner edge area of the insertion hole corresponding to the wall surface.
Claims13
A permanent magnet embedded motor, comprising:
- a stator of an annular shape;
- and
- a rotor, arranged inside the stator, comprising a rotor core and permanent magnets, and rotating about a predetermined axis, the rotor core comprising insertion holes arranged in a circumferential direction and filling parts provided adjacent to the insertion holes respectively for filling with an adhesive, each of the permanent magnets being inserted into the corresponding insertion hole, wherein
- each of the insertion holes comprises a wall surface to which the permanent magnet adheres;
- and
- at one opening end of the insertion hole, the corresponding filling part is of a shape obtained by cutout in a stepped-down manner in an inner edge area of the insertion hole corresponding to the wall surface, wherein
- a cross section of the insertion hole perpendicular to the axis is of a rectangular shape comprising a long side and a short side;
- a cross section of the permanent magnet perpendicular to the axis is of a rectangular flat plate shape comprising a long side and a short side;
- and
- the filling part is of a shape obtained by cutout in a stepped-down manner in an inner edge area along the long side of the insertion hole.
Dependencies are inferred from the claim text.