Electromagnetic induction type position sensor
US7049924B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 29, 2005 |
| Grant date | May 23, 2006 |
| Priority date | — |
| Expiry date | Jun 29, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F5/003
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electromagnetic induction type position sensor comprises an AC magnetic flux generating device which generates AC magnetic flux substantially at a wavelength λ, and a plurality of coils which receives the AC magnetic flux to output electromagnetic induction voltages. Each coil includes a plurality of sinusoidal conductive patterns at a wavelength λ formed in each of an even number of layers laminated via insulating materials. The plurality of conductive patterns formed in a same layer is arranged with a space between them in an amplitude direction of the sinusoidal shape, and is formed at the same position as a plurality of conductive patterns formed in another adjacent layer, and its amplitude is in a reverse phase to that of the plurality of conductive patterns formed in the other adjacent layer. All the conductive patterns constituting the same coil are connected in series so that a direction of an electric current of these conductive patterns is opposite to that of the conductive patterns in reverse phases when viewed from the front of the layers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.