Brushless DC motor with a two-layered permanent magnet rotor structure
US6072256A · kind A · utility
16Cited by
10References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 5, 1999 |
| Grant date | Jun 6, 2000 |
| Priority date | — |
| Expiry date | Apr 5, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49012
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A brushless DC motor having external and internal permanent magnets buried in rotor core in a two-tier structure to form the poles of the rotor, thereby improving efficiency of the motor and reducing vibration and noise, as well.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.