Piezoelectric transformer and power converting apparatus employing the same
US5751092A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 5, 1996 |
| Grant date | May 12, 1998 |
| Priority date | — |
| Expiry date | Jul 5, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10N30/40
Abstract
A piezoelectric transformer has a driving section area which is provided with input electrodes at the central portion of a long-plate-shaped piezoelectric element and which is polarized in the direction of the thickness thereof; and power generating section areas which are provided with output electrodes on the ends surfaces in the direction of the length thereof, which are polarized in the opposite directions from each other with the driving section area between them, and which are disposed on both ends of the piezoelectric element. The piezoelectric transformer is excited in the half wavelength mode to obtain an output between the output electrodes and the input electrodes. A ratio L2/L1 of the length L2 of the driving section to the overall length L1 in the direction of the length of the piezoelectric transformer ranges from 0.3 to 0.6.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.