Rotor for electric motor
AssigneeKabushiki Kaisha Toshiba
InventorsTsuyoshi Shiga, Kinya Hayashi, Masami Endou
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Abstract
A rotor for an electric motor includes a frame made of a resin and having a cylindrical yoke mounting portion, a base covering one end side of the yoke mounting portion, and a shaft supporting portion located at the center of rotation of the base, all of which are formed integrally with the frame, a rotor yoke mounted on the yoke mounting portion and substantially divided into a plurality of unit yokes, and a plurality of rotor magnets mounted on the yoke mounting portion along the rotor yoke.
Claims17
A rotor for an electric motor, comprising:
- a frame made of a resin and having a cylindrical yoke mounting portion, a base covering one end side of the yoke mounting portion, and a shaft supporting portion located at a center of rotation of the base, the yoke mounting portion, the base and the shaft supporting portion being formed integrally with the frames;
- a rotor yoke provided on the yoke mounting portion and substantially divided into a plurality of unit yokes;
- and
- a plurality of rotor magnets provided on the yoke mounting portion along the rotor yoke.
The rotor according to claim l, wherein each unit yoke has two circumferential ends each of which is adjacent to a circumferential end of a neighboring unit yoke with a space therebetween, and the rotor magnets include some magnets which have a circumferential central portion opposed to the space between the adjacent ends of the unit yokes.
Dependencies are inferred from the claim text.