Achievement of Miniaturized and Inductor-less AC-DC converter Using Mechanical Resonance of Single-Crystal Piezoelectric Small-Thin Rectangular Plate

点击翻译按钮获取中文摘要

This study aims to achieve a miniaturized and high efficiency AC-DC converter without the wiring, by using the single-crystal piezoelectric transformer. As the results of the analysis and measurement, it has been found that the piezoelectric transformer with very high efficiency of about 95% can be achieved. Next, for obtaining the high-performance driving circuit of the piezoelectric transformer, the switching characteristics of the MOSFET switching circuits have been examined in detail in the high-frequency range from around 100kHz to 900kHz. Moreover, the measuring system has been constructed to measure precisely the performance characteristics of the piezoelectric transformer, by controlling the unstable non-linear phenomena appearing during the practical high-power driving of the piezoelectric transformer.