Planar coil linear actuator and transducer
US11356780B2 · kind B2 · utility
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12Claims
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Key dates
| Filing date | Sep 24, 2020 |
| Grant date | Jun 7, 2022 |
| Priority date | — |
| Expiry date | Sep 24, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2400/03
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A planar coil linear actuator/transducer. A stack of individually driven planar coils are used. A common core passes through the center of the stack of coils. A mobile magnet resides in the core. The coils are selectively energized in order to drive the magnet as desired. It is possible to control both frequency and amplitude by controlling the motion of the magnet. In a preferred embodiment, each planar coil is created as a copper (or other conductive material) trace on a multi-layer printed circuit board.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.