Electric motor magnetic flux path structure
US6737780B1 · kind B1 · utility
13Cited by
31References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 8, 2003 |
| Grant date | May 18, 2004 |
| Priority date | — |
| Expiry date | Sep 8, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K1/17
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electric motor 10 has an armature 12 including windings 14. The armature is constructed and arranged to rotate a shaft 16. The motor includes a commutator 18 and a brush card assembly 20 having brushes to engage the commutator and conduct electrical current to the windings. A permanent magnet structure 21 is disposed about the armature. A frame assembly 22 carries the permanent magnet structure. A coil spring structure 36, containing iron, is disposed about and contacts the permanent magnet structure to define a flux path of the motor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.