Maximum Power Transfer versus Efficiency in Mid-Range Wireless Power Transfer Systems
Maximum Power Transfer versus Efficiency in Mid-Range Wireless Power Transfer Systems
复制标题
中程无线功率传输系统的最大功率传输与效率
DOI：
10.1590/2179-10742015v14i1433
复制
发表时间：
2015
影响因子：
--
通讯作者：
C. Miranda
中科院分区：
文献类型：
--
作者：
P. J. Abatti;S. F. Pichorim;C. Miranda
从电路分析中推导出了双线圈无线电能传输（WPT）系统的最大功率传输条件，并结合相应的WPT系统效率（η）进行了讨论。在该序列中，示出了在两个通信电路处没有功率损耗的4线圈WPT系统（其可以被划分为源、两个通信电路和负载电路）（理想的4线圈WPT系统）从最大功率传输和效率的角度来看呈现出与2线圈WPT系统的性能类似的性能。例外是耦合系数（k）的影响：在2线圈系统中，η随着k接近1而增加，而在理想的4线圈WPT系统中，η随着两个通信线圈之间的k接近0而增加。此外，还分析了实际的4线圈WPT系统（在两个通信电路处具有功率损耗），例如，示出了η作为通信线圈的k的函数呈现最大值。为了验证所提出的理论，建立了4个线圈，并进行了2线圈和4线圈WPT系统的设置。实际结果表明，与发达国家的理论。
The condition for maximum power transfer of 2-coils wireless power transfer (WPT) system is derived from circuit analysis and discussed together with the respective WPT system efficiency (η). In the sequence, it is shown that a 4-coils WPT system (which can be divided in source, two communication and load circuits) without power losses at the two communication circuits (ideal 4-coils WPT system) presents, from maximum power transfer and efficiency point of view, a performance similar to those of a 2-coils WPT system. The exception is the influence of coupling coefficient (k): in 2-coils system η increases as k approaches one, while in ideal 4-coils WPT system η increases as k between the two communication coils approaches zero. In addition, realistic 4-coils WPT systems (with power losses at the two communication circuits) are also analyzed showing, for instance, that η presents a maximum as a function of k of the communication coils. In order to validate the presented theory, 4 coils were built, and a setup to perform 2-coils and 4-coils WPT systems has been carried out. Practical results show good agreement with the developed theory.