| 摘要 |
<p>The present invention relates to a piezoelectric transformer (100) comprising an elongate piezoelectric ceramic body (102) adapted to operate in fundamental thickness mode. The elongate piezoelectric ceramic body (102) comprises a central input or primary section (112) coupled to adjacently arranged first (114) and second (116) 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.</p> |
