Disc rotor air cooled D.C. motor
US5903118A · kind A · utility
Inventors
Key dates
| Filing date | Dec 16, 1997 |
| Grant date | May 11, 1999 |
| Priority date | — |
| Expiry date | Dec 16, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/70
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A brushless direct current (DC) electric motor includes a rotor and a stator. The rotor has at least one disc mounted to a central shaft. The disc has an outer portion consisting of permanent magnets. The magnets are mounted with their direction of magnetization transversing through the disc. The stator includes C-shaped electromagnets which straddle the disc and are mounted with their magnetic poles aligned in coupling proximity to the poles of the permanent magnets in the disc. Position circuitry senses a position of the permanent magnets with respect to the electromagnets and then provides a signal based on the position to the electromagnets to cause the rotor to rotate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.