Design of Y-type sandwich piezoelectric ultrasonic transformer
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摘要:
提出了Y型夹心式压电超声变压器, 基于耦合振动理论和力电类比原理, 建立了变压器的机电等效电路模型, 推导得到了其共振/反共振频率方程、电压增益和功率增益表达式。通过等效电路法、有限元仿真和实验研究了该变压器的功率传输特性和机电转换特性。结果表明, 在共振模式下, Y型夹心式压电超声变压器的输入机电阻抗最小, 电压增益和功率增益最大, 有望作为双通道压电变压器应用于电子领域。
Abstract:A Y-type sandwich piezoelectric ultrasonic transformer is proposed. Based on the coupled vibration theory and the principle of electromechanical analogy, the electromechanical equivalent circuit model of the transformer is established, and its resonance/anti-resonance frequency equation, voltage gain and power gain expressions are derived. The power transfer characteristics and electromechanical conversion characteristics of the transformer are studied by equivalent circuit method, finite element simulation and experiment. The results show that in the resonance mode, the Y-type sandwich piezoelectric ultrasonic transformer has the smallest input reactance and the largest voltage gain and power gain, which is expected to be used in the electronics field as a dual-channel piezoelectric transformer.
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Key words:
- Piezoelectric ultrasonic transformer /
- Equivalent circuit /
- Voltage gain /
- Power gain
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