Laminated motor structure for electromagnetic transducer
US7457429B2 · kind B2 · utility
3Cited by
2References
42Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 31, 2003 |
| Grant date | Nov 25, 2008 |
| Priority date | — |
| Expiry date | Dec 12, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2209/021
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An electromagnetic transducer such as an audio speaker having at least one of the soft magnetic components of its motor assembly constructed as a laminated structure of electrically insulated magnetically conductive sections. Eddy currents, which would have been induced in a monolithic component in response to an electrical signal applied to the voice coil, are prevented or significantly reduced by the electrical insulation material between the sections of the laminated component. The transducer produces less heat, is less susceptible to flux modulation, and has increased power handling and reduced distortion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.