Power generation unit, electronic apparatus, transportation device, battery, and method of controlling power generation unit
US8957566B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 2, 2012 |
| Grant date | Feb 17, 2015 |
| Priority date | — |
| Expiry date | Aug 27, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02N2/188
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A power generation unit includes a first piezoelectric device having a pair of electrodes, a second piezoelectric device stacked on the first piezoelectric device, a switch electrically connected between the pair of electrodes, a current detection section adapted to detect a current generated in the second piezoelectric device, and a control section adapted to control the switch, and the control section electrically connects the switch for a predetermined period in at least either one of a case in which the current detected by the current detection section reaches a level one of equal to and higher than a first reference value or a case in which the current reaches a level one of equal to and lower than a second reference value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.