Rotating electrical machine
AssigneeKabushiki Kaisha Yaskawa Denki
InventorsNaotake YOSHIZAWA, Kiyomi INOUE, Yoshiaki KAMEI, Takaaki SHIBUYA
Life of this patent
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Abstract
The disclosure discloses a rotating electrical machine including a stator and a rotor. The rotor includes a cylindrical iron core that is fixed to a shaft and comprises a radial direction and an axial direction, a plurality of permanent magnets that is embedded in the iron core, a plurality of air gaps that are respectively provided in a portion on an inner side of the iron core in the radial direction, a wedge portion that is provided along the axial direction so as to protrude within the air gap, and a non-magnetic reinforcing member that is filled in the air gap.
Claims7
A rotating electrical machine comprising:
- a stator;
- and
- a rotor,
- the rotor including:
- a cylindrical iron core that is fixed to a shaft and comprises a radial direction and an axial direction;
- a plurality of permanent magnets that is embedded in the iron core;
- a plurality of air gaps that are respectively provided in a portion on an inner side of the iron core in the radial direction;
- a wedge portion that is provided along the axial direction so as to protrude within the air gap;
- and
- a non-magnetic reinforcing member that is filled in the air gap.
A rotating electrical machine comprising:
- a stator;
- and
- a rotor,
- the rotor including:
- a cylindrical iron core that is fixed to a shaft and comprises a radial direction and an axial direction;
- a plurality of permanent magnets that is embedded in the iron core;
- a plurality of air gaps that is provided in a portion on an inner side of the iron core in the radial direction;
- a wedge portion that is provided along the axial direction so as to protrude within the air gap;
- and
- a non-magnetic reinforcing member that is filled in the air gap;
- a cross sectional shape of the air gap in a cross section perpendicular to the axial direction being a polygon,
- the air gap including:
- a magnet facing surface configured to face a side surface which is a magnetic flux generating surface of the permanent magnet and to reduce a leakage magnetic flux to the inner side of the rotor in the radial direction;
- and
- a magnetic flux guide surface configured to guide a magnetic flux of the permanent magnet to the outer side of the rotor in the radial direction;
- and
- the wedge portion being provided on a position of a corner portion of the polygon located between the two magnetic flux guide surfaces within the air gap.
A rotating electrical machine comprising:
- a stator;
- and
- a rotor,
- the rotor including:
- a cylindrical iron core that is fixed to a shaft and comprises a radial direction and an axial direction;
- a plurality of permanent magnets that is embedded in the iron core;
- a plurality of air gaps that is provided in a portion on an inner side of the iron core in the radial direction;
- means for blocking a magnetic flux of the permanent magnet, filled in the air gap;
- and
- means for enhancing a rigidity of the iron core, provided in the air gap.
Dependencies are inferred from the claim text.