Coil unit, and power transmission device and power reception device using the coil unit
US8269375B2 · kind B2 · utility
39Cited by
2References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 19, 2010 |
| Grant date | Sep 18, 2012 |
| Priority date | — |
| Expiry date | Nov 13, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J50/90
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A coil unit includes a first coil having an outer diameter of D1, and at least one second coil having an outer diameter of D2 (D2<D1). The at least one second coil is arranged on a transmission surface side of the first coil. A part or whole of the at least one second coil overlaps the first coil, when viewed from the transmission surface side.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.