Permanent magnet for motor, motor housing, and motor device
US7812484B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 29, 2005 |
| Grant date | Oct 12, 2010 |
| Priority date | — |
| Expiry date | Aug 15, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K15/03
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
To improve resistance of a motor device against an organic solvent and to suppress degradation in performance of the motor device with time.In a motor device, an excitation magnet is formed using a hollow-cylinder shaped anisotropic bonded magnet 13. This bonded magnet 13 is press-fitted in a housing 12 and is held. The bonded magnet 13 is formed of a hollow-cylinder shaped anisotropic rare earth bonded magnet which is obtained by compounding an anisotropic rare earth magnet powder with a phenol-novolac type epoxy resin, followed by molding. The anisotropic rare earth bonded magnet 13 is press-fitted along an inner peripheral portion of the housing 12, and on an exposed surface layer of the anisotropic rare earth bonded magnet press-fitted in the housing, a coating layer is formed by an infiltration treatment using a polyamide-imide-based resin.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.