| 摘要 |
The present invention relates to a piezoelectric transformer comprising an elongate piezoelectric ceramic body adapted to operate in fundamental thickness mode. The elongate piezoelectric ceramic body comprises a central input or primary section coupled to adjacently arranged first and second output sections. High power conversion efficiency and zero-voltage switching capability is achieved by providing a primary side effective electromechanical coupling factor keff—P, which is larger than a secondary side electromechanical coupling factor, keff—S. |
