Electronic control method for a planar inductive battery charging apparatus
US8228025B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 9, 2007 |
| Grant date | Jul 24, 2012 |
| Priority date | — |
| Expiry date | Dec 24, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M7/4815
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
This invention provides an electronic control method for a planar inductive battery charging apparatus on which one or more electronic loads such as mobile phones, MP3 players etc can be placed and charged simultaneously. The power control circuit of the charging pad consists of two power conversion stages. Depending on the nature of the input power supply, the first power stage is an AC-DC power converter with variable output voltage control and a second stage is a DC-AC power inverter with constant current control. The combination of the two stages provides power control of the charging pad and generates AC magnetic flux of ideally constant magnitude over the charging areas within a group of primary windings that are excited.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.