Load optimization factors for analyzing the efficiency of wireless power transfer systems using two-port network parameters
Load optimization factors for analyzing the efficiency of wireless power transfer systems using two-port network parameters
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DOI：
10.1587/elex.17.20200093
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发表时间：
2020-05
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影响因子：
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通讯作者：
Yoshiaki Narusue;Y. Kawahara;H. Morikawa
中科院分区：
文献类型：
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作者：
Yoshiaki Narusue;Y. Kawahara;H. Morikawa
本文使用无源二端口网络参数对具有任意负载阻抗的无线功率传输系统的功率效率进行了建模和分析。在这个公式中，定义并引入了两个新颖的指数——负载电阻优化因子和负载电抗优化因子——来指示负载电阻和负载电抗与其最佳值的偏差。结果表明，这些系统的功率效率可以仅使用它们的 k – Q 乘积和定义的负载优化因子来制定。此外，我们还表明，效率与最大可用效率的比率可以用单个复杂因子来表征。所提出的方法有助于对负载阻抗与其最佳值之间的差异造成的效率恶化进行定量解释。
Thispapermodelsandanalyzesthepowerefficiencyofwireless power transfer systems with arbitrary load impedances using passive two- port network parameters. In this formulation, two novel indices—the load resistance optimization factor and the load reactance optimization factor— are defined and introduced to indicate the deviation of the load resistance and load reactance from their optimal values. It is shown that the power efficiency of these systems can be formulated using only their k – Q product and the defined load optimization factors. Additionally, we show that the ratio of efficiency to maximum available efficiency can be characterized withonesinglecomplexfactor. Theproposedapproachhelpsthequantitive interpretation of the efficiency deterioration by the difference between the load impedance and its optimal value.