Power source apparatus
US7005780B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 9, 2002 |
| Grant date | Feb 28, 2006 |
| Priority date | — |
| Expiry date | Jan 23, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02N2/183
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
This invention relates to a power source apparatus using piezoelectric elements.A conventional power source apparatus using the piezoelectric element has an ability of generating less electricity, and therefore, has been applicable only to equipment which operates with low power consumption. To solve the problems of the conventional power source apparatus, the inventor has devised a “power source apparatus” and disclosed in Japanese Utility Model Registration No. 3074105. However, the devised power generating device has the Zener diode used as the trigger circuit determining the quantity of the charged electricity. Therefore, it is necessary to operate the trigger circuit all the time, consequently to use too much electricity to operate. The electrical power consumption therefor is unignorable compared with the electric energy generated by the piezoelectric element. The consumption of the unignorable quantity of electricity for monitoring the current with the Zener diode makes it impossible to charge a lot of electricity in the device. Thus, there has been room for further improvement in the devised power generating device used for electric power equipment having need of relatively…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.