| 白凤仙,董维杰,解永平.基于[WTHX]Y[WTHZ]参数的压电变压器端口串-并联接特性研究[J].,2010,(5):756-761 |
| 基于[WTHX]Y[WTHZ]参数的压电变压器端口串-并联接特性研究 |
| Research on characteristics of series-parallel connected piezoelectric transformers based on [WTHX]Y[WTHZ] parameter |
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| DOI：10.7511/dllgxb201005023 |
| 中文关键词: 等效电路 Y参数 串-并联接 电压增益 降压 |
| 英文关键词: equivalent circuit Y parameter series-parallel connection voltage gain voltage step-down |
| 基金项目:辽宁省博士启动基金资助项目20051080；大连市青年人才基金资助项目2005j22jh028. |
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| 中文摘要: |
| 基于压电变压器的经典集总参数等效电路模型，压电变压器串-并联接的电气特性由导纳矩阵Y参数描述，导出了电压增益、输出功率和效率与单片压电变压器的模型参数和压电变压器联接个数的关系表达式，并采用径向振动型压电变压器模型参数进行了仿真分析．测试了电压增益为0.081 6、输入和输出隔离的两片降压压电变压器，在相同负载20 Ω时，端口串-并联接后的电压增益达到0.040 6．计算和实验结果表明，压电变压器端口串-并联接能够进一步提升降压比．因此，压电变压器串-并联接可以作为实现降压的一种方法． |
| 英文摘要: |
| Based on the conventional lumped parameter equivalent circuit model, the electrical characteristics of piezoelectric transformers (PTs) in series-parallel connection were analyzed using Y-parameter matrix. The voltage gain, output power and efficiency as function of parameters and the number of connected piezoelectric transformers were derived and simulated. And the electrical characteristics were simulated by using radial-mode vibrating PTs. Two piezoelectric transformers at the voltage gain of 0.081 6 with input and output parts isolated were tested. After series-parallel connection the voltage gain was reduced to 0.040 6 on the same load of 20 Ω. The computed and experimental results verify the fact that the series-parallel connection of piezoelectric transformers can enhance the voltage step-down ratio. Series-parallel connected piezoelectric transformers can realize voltage step-down. |
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