Design of a piezoelectric transformer converter and its matching networks

The feasibility of using the piezoelectric material for power transformation has been investigated for low profile DC/DC power converter design. This paper presents a systematic way to design a DC/DC power converter with a piezoelectric transformer (PT). The electrical equivalent circuit for the PT is developed. This model explains why the loss of the PT strongly depends on load and switching frequency. The two-port power flow method is employed to calculate the maximum efficiency of the PT. A complete PT converter, composed of amplifier, the PT and its matching networks, is built. Both experimental and simulated results of PT converter demonstrated that the above study is truly useful for designing the PT converters.<
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