Reinforced permanent magnet rotor with cast zinc
First Claim
1. A rotor comprising a cylindrical rotor core, plural permanent magnets arranged on the outer periphery of said rotor core, a protective cover on the outer periphery of said permanent magents, said rotor core including an axial through hole, and end rings which are positioned on both ends of said through hole of the rotor core and are integrally cast by molten metal of zinc said end rings including a balance weight, said protective cover covering at least a portion of the outer periphery of said end rings.
1 Assignment
0 Petitions
Accused Products
Abstract
A novel rotor construction is disclosed, in which plural permanent magnets are arranged on the outer periphery of a rotor core, which are protected with a cover, and in which a member is placed at an axial end of the rotor core cast with end rings with a balance weight on the outside thereof. The protective cover protects the outer peripheries of the end rings and dampens the centrifugal force of the balance weight. Projections provided on the outer periphery of the member are located at the center of the permanent magnets to reduce the leakage magnetic fluxes between the permanent magnets.
48 Citations
9 Claims
- 1. A rotor comprising a cylindrical rotor core, plural permanent magnets arranged on the outer periphery of said rotor core, a protective cover on the outer periphery of said permanent magents, said rotor core including an axial through hole, and end rings which are positioned on both ends of said through hole of the rotor core and are integrally cast by molten metal of zinc said end rings including a balance weight, said protective cover covering at least a portion of the outer periphery of said end rings.
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8. A rotor comprising a cylindrical rotor core, plural permanent magnets arranged on the outer periphery of said rotor core, a protective cover on the outer periphery of said permanent magnets, said rotor core including at least one axial through hole, and end rings which are positioned on both ends of said at least one axial through hole of said rotor core and are integrally cast by molten metal, said molten metal filling said at least one axial through hole of said rotor core so that said end rings are integrally cast with said rotor core, said molten metal being zinc.
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9. A rotor comprising a cylindrical rotor core, plural permanent magnets arranged on the outer periphery of said rotor core, a protective cover on the outer periphery of said permanent magnets, said rotor core including at least one axial through hole, and end rings which are positioned on both ends of said through hole of said rotor core and are integrally cast by molten metal of zinc, said end rings including a balance weight formed integrally therewith by said molten metal.
Specification