Rotor assembly for an electric motor
A rotor assembly includes several permanent magnets (20, 22, 24, 26) separated by spacers (28). The permanent magnets and the spacers are all fabricated from material having the same coefficient of thermal expansion. The spacers are in a non-magnetized state and provide support for a sleeve (30) pla...
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| Format: | Patent |
| Sprache: | eng ; fre ; ger |
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| Zusammenfassung: | A rotor assembly includes several permanent magnets (20, 22, 24, 26) separated by spacers (28). The permanent magnets and the spacers are all fabricated from material having the same coefficient of thermal expansion. The spacers are in a non-magnetized state and provide support for a sleeve (30) placed in a high interference fit with the permanent magnets. The sleeve is thereby fully supported about the inner circumference (32) such that uneven bending stresses are significantly reduced to provide a desired operational life. |
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