Piezoelectric transformers based on shear vibration modes

Abstract

This paper proposed a new piezoelectric transformer structure based on shear vibration modes. The difficulty in the preparation of shear vibration piezoelectric transformer was minimised using the integrated structure design. The transformer working mode was determined using a finite element simulation and laser vibrometer. A transformer preparation methodology was designed, and the transformer samples were fabricated. The test results showed that by optimising the area ratio between the input and output of the piezoelectric transformer, its voltage ratio, operating frequency, efficiency, and other parameters can be adjusted. The piezoelectric transformer samples were tested at 110 kHz. The maximum variable voltage ratio and efficiency can reach 34.1 and 91%, respectively.

Keywords:

• Piezoelectric transformer
• shear vibration mode
• variable voltage ratio

Additional information

Funding

This work was supported by Beijing Natural Science Foundation (2214057), the National Natural Science Foundation of China (U2006218), the Qin Xin Talents Cultivation Program of Beijing Information Science & Technology University (QXTCP A202103), and the Research Fund Program of Beijing Information Science & Technology University (2021XJJ72, 2021XJJ67).