Rectifier-free piezoelectric energy harverster and battery charger
US8368290B2 · kind B2 · utility
34Cited by
11References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 18, 2011 |
| Grant date | Feb 5, 2013 |
| Priority date | — |
| Expiry date | Sep 30, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02N2/181
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A circuit for harvesting electrical energy from a piezoelectric source and for storing the electrical energy in a battery includes an inductor that is configured to store electrical energy. A diode bridge-free switching network is configured to: direct electrical energy from the piezoelectric source to the inductor during a first portion of a piezoelectric charge generating cycle; and direct electrical energy from the inductor to the battery during a second portion of the piezoelectric charge generating cycle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.