Electric Rotating Machine and Hybrid Car Provided with the Same
First Claim
1. An electric rotating machine comprising:
- a stator;
a rotor having a rotor core and inserted in a bore formed in the stator such that an air gap is formed between the stator and the rotor; and
magnetic poles circumferentially arranged in a peripheral portion of the rotor core of the rotor;
wherein the rotor further comprises means for inducing compressive stress.
1 Assignment
0 Petitions
Accused Products
Abstract
An electric rotating machine includes a stator, a rotor inserted in a bore of the stator such that an air gap is formed between the stator and the rotor, and a plurality of permanent magnets embedded in a peripheral portion of the rotor core of the rotor in a circumferential arrangement. Slits are formed in portions of the rotor core each extending between the adjacent magnetic poles. Compressive stress is induced in portions of the rotor core each extending between the slit and the permanent magnet when stress is induced in the portion of the stator core extending between the slit and the permanent magnet by centrifugal force produced when the rotor rotates and acting on the permanent magnet and a pole piece covering the permanent magnet.
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Citations
17 Claims
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1. An electric rotating machine comprising:
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a stator; a rotor having a rotor core and inserted in a bore formed in the stator such that an air gap is formed between the stator and the rotor; and magnetic poles circumferentially arranged in a peripheral portion of the rotor core of the rotor; wherein the rotor further comprises means for inducing compressive stress.
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2. An electric rotating machine comprising:
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a stator; a rotor having a rotor core and inserted in a bore formed in the stator such that an air gap is formed between the stator and the rotor; and magnetic poles circumferentially arranged in a peripheral portion of the rotor core of the rotor; wherein the rotor further comprises slits formed in the rotor core and extending between the adjacent ones of the magnetic poles. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. An electric rotating machine comprising:
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a stator; a rotor having a rotor core and inserted in a bore formed in the stator such that an air gap is formed between the stator and the rotor; and magnetic poles circumferentially arranged in a peripheral portion of the rotor core of the rotor; wherein the rotor further comprises openings extending between the magnetic poles.
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Specification