Brushless direct-current motor of radial core type having a structure of double rotors and method for making the same
US7356906B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 18, 2005 |
| Grant date | Apr 15, 2008 |
| Priority date | — |
| Expiry date | Jan 24, 2026 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49012
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method of manufacturing a radial core type double rotor brushless direct-current motor is provided. A double rotor structure is employed with inner and outer rotors which are doubly disposed such that a stator core is completely divided. A rotational shaft is rotatably mounted on a housing of an apparatus, cylindrical inner and outer yokes are rotatably mounted on the center of the housing, inner and outer rotors including a number of magnets which are mounted with opposing polarities on the outer surface of the inner yoke and the inner surface of the outer yoke, and a number of cores assemblies are installed between the inner and outer rotors in which a number of coils are wound around a number of division type cores, respectively.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.