Electrical-steel-sheet formed body for rotor core, rotor, rotary electric machine and related method
First Claim
Patent Images
1. An electrical-steel-sheet formed body for use in forming a rotor core of a built-in permanent magnet type rotary electric machine, comprising:
- an opening portion into which a permanent magnet is inserted; and
an outer-peripheral hardened portion formed on the electrical-steel-sheet formed body at an outer periphery side of the opening portion and having a higher hardness than a remaining area of the electrical-steel-sheet formed body.
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Accused Products
Abstract
An electrical-steel-sheet formed body is provided with an opening portion into which a permanent magnet is inserted, and an outer-peripheral hardened portion formed on the electrical-steel-sheet formed body at an outer periphery side thereof for the opening portion and having a higher hardness than a remaining area of the electrical-steel-sheet formed body. The electrical-steel-sheet formed body can be used as the rotor of the built-in permanent magnet type rotary electric machine, and the built-in permanent magnet type rotary electric machine can be obtained.
29 Citations
20 Claims
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1. An electrical-steel-sheet formed body for use in forming a rotor core of a built-in permanent magnet type rotary electric machine, comprising:
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an opening portion into which a permanent magnet is inserted; and
an outer-peripheral hardened portion formed on the electrical-steel-sheet formed body at an outer periphery side of the opening portion and having a higher hardness than a remaining area of the electrical-steel-sheet formed body. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A rotor for a built-in permanent magnet type rotary electric machine, the rotor comprising:
a permanent magnet; and
an electrical-steel-sheet formed body having an opening portion for insertion of the permanent magnet and including an outer-peripheral hardened portion formed in the electrical-steel-sheet formed body at an outer periphery side thereof and which has a higher hardness than a remaining area of the electrical-steel-sheet formed body.
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11. A built-in permanent magnet type rotary electric machine, comprising:
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a stator;
a winding disposed in the stator; and
a rotor disposed in opposition to the stator, the rotor being provided with;
a permanent magnet; and
an electrical-steel-sheet formed body having an opening portion for insertion of the permanent magnet and including an outer-peripheral hardened portion formed in the electrical-steel-sheet formed body at an outer periphery side thereof and which has a higher hardness than a remaining area of the electrical-steel-sheet formed body.
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12. A method of manufacturing an electrical-steel-sheet formed body for use in forming a rotor core of a built-in permanent magnet type rotary electric machine, the method comprising:
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preparing an electrical steel sheet;
forming an opening portion in the electrical steel sheet for insertion of a permanent magnet therein;
forming a contoured shape of the electrical steel sheet corresponding to a contoured shape of a rotor; and
forming an outer-peripheral hardened portion on the electrical-steel-sheet formed body having a higher hardness than a remaining area of the electrical steel sheet by applying an external action thereto such that the outer-peripheral hardened portion is located at an outer periphery side of the electrical steel sheet. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification