Power generation unit, electronic apparatus, transportation unit, battery, method of controlling power generation unit
US8653718B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 4, 2012 |
| Grant date | Feb 18, 2014 |
| Priority date | — |
| Expiry date | May 4, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10N30/306
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A power generation unit includes: a deformation member which is deformed by switching a deformation direction; a piezoelectric element which is installed to the deformation member; a pair of electrodes which are installed to the piezoelectric element; an inductor which is installed between the pair of the electrodes and which together with a capacitive component of the piezoelectric element constitutes a resonance circuit; a switch which is connected in series to the inductor; a full bridge rectifier which is installed between the pair of the electrodes to rectify an AC current generated by the piezoelectric element; a voltage detection circuit which detects potentials of an anode and cathode of a diode included in the full bridge rectifier; and a controller which allows the switch to be in an ON state for a predetermined time interval based on an output signal of the voltage detection circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.