Rectifiers for wireless power transfer with impedance inverting filters for reduced electromagnetic interference
US9923584B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 3, 2015 |
| Grant date | Mar 20, 2018 |
| Priority date | — |
| Expiry date | Dec 22, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J50/12
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Resonant rectifier topologies are described for tuning the rectifier so that it performs from an electromagnetic interference (EMI) point of view, while maintaining the voltage regulation at the output that a series tuned rectifier would maintain. Examples include a an inductor of a receive coupler and a rectifier connectable to drive a load, along with first and second filter elements that are each configured to provide an impedance inversion function in a frequency band and that are connected in series between the inductor of a receive coupler and rectifier. In one set of examples, both filter elements are implemented as pair filters, while in other examples the first filter element includes the inductor of a receive coupler in parallel with a capacitance connected to ground.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.