Power transmission control device, power transmission device, electronic instrument, and non-contact power transmission system
US7804197B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 27, 2008 |
| Grant date | Sep 28, 2010 |
| Priority date | — |
| Expiry date | Nov 29, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J50/90
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A power transmission control device provided in a power transmission device of a non-contact power transmission system includes a drive clock signal generation circuit that generates a drive clock signal, a driver control circuit that generates a driver control signal based on the drive clock signal, a waveform detection circuit, and a control circuit. The waveform detection circuit includes a pulse width detection circuit that measures a first pulse width period to detect first pulse width information, the first pulse width period being a period between a first edge timing of the drive clock signal and a first timing, the first timing being a timing when a first induced voltage signal that has changed from a low-potential-side power supply voltage exceeds a first threshold voltage. The control circuit detects the power-reception-side load state based on the first pulse width information.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.