Power transfer device, power supply device and power receiving device
US8319489B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 26, 2009 |
| Grant date | Nov 27, 2012 |
| Priority date | — |
| Expiry date | Sep 28, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J50/12
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A power transfer device includes: a transformer that couples a primary circuit and a secondary circuit and has a coupling constant of less than 1; and capacitances that are respectively provided in the primary circuit and the secondary circuit, and connected in series with coils that form the transformer. Circuit constants of the primary circuit and the secondary circuit are set so that the primary circuit and the secondary circuit resonate at the same frequency and a product of the square of the coupling constant, a Q value of the primary circuit and a Q value of the secondary circuit is 1. The primary circuit transfers power to the secondary circuit by means of the transformer, using a carrier wave having the resonance frequency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.