Low cogging and easy-to-downsize spindle motor structure
US7109631B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 14, 2005 |
| Grant date | Sep 19, 2006 |
| Priority date | — |
| Expiry date | Feb 14, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K21/24
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention relates to a low cogging and easy-to-downsize spindle motor structure. The motor is an axial magnetic flux spindle motor comprising a stator assembly and a rotor assembly. The stator assembly comprises a deck for seating the rotor assembly and at least one bearing placed on the housing of said stator and between the stator and the rotor. The outer periphery part of the bearings is the stationary part; with the inner part of said bearings being the rotating part. A cylindrical shaft is located in the center of the rotor. When the thin windings of stator are excited with current, a rotating magnetic field is created, forcing said rotor into rotation, and as a consequence, bringing the spindle into rotation that generates motor output needed to drive loads.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.