System and method of providing communications in a wireless power transfer system
US9407332B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 4, 2014 |
| Grant date | Aug 2, 2016 |
| Priority date | — |
| Expiry date | Apr 4, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K7/10
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A communication system that uses keyed modulation to encode fixed frequency communications on a variable frequency power transmission signal in which a single communication bit is represented by a plurality of modulations. To provide a fixed communication rate, the number of modulations associated with each bit is dynamic varying as a function of the ratio of the communication frequency to the carrier signal frequency. In one embodiment, the present invention provides dynamic phase-shift-keyed modulation in which communications are generated by toggling a load at a rate that is a fraction of the power transfer frequency. In another embodiment, the present invention provides communication by toggling a load in the communication transmitter at a rate that is phase locked and at a harmonic of the power transfer frequency. In yet another embodiment, the present invention provides frequency-shift-keyed modulation, including, for example, modulation at one of two different frequencies.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.