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基于Y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 Y parameter
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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0.0816、输入和输出隔离的两片降压压电变压器,在相同负载20Ω时,端口串-并联接后的电压增益达到0.0406.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. Based on the conventional lumped parameter equivalent circuit model,the electrical characteristics of piezoelectric transformers（PTs）in series-parallel connection were analyzed using Yparameter 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 6with input and output parts isolated were tested.After series-parallel connection the voltage gain was reduced to 0.040 6on the same load of 20Ω.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.
作者 白凤仙 董维杰 解永平
机构地区 大连理工大学电子科学与技术学院 大连理工大学信息与通信工程学院
出处 《大连理工大学学报》 EI CAS CSCD 北大核心 2010年第5期756-761,共6页 Journal of Dalian University of Technology
基金 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)
关键词 等效电路 Y参数 串-并联接 电压增益 降压 equivalent circuit Y parameter series-parallel connection voltage gain voltage stepdown
分类号 TM282 [一般工业技术—材料科学与工程]
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参考文献12

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大连理工大学学报
2010年 第5期

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