A Design Method for Making an LCC Compensation Two-Coil Wireless Power Transfer System More Energy Efficient Than an SS Counterpart
A Design Method for Making an LCC Compensation Two-Coil Wireless Power Transfer System More Energy Efficient Than an SS Counterpart
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DOI：
10.3390/en10091346
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发表时间：
2017-09-01
期刊：
影响因子：
3.2
通讯作者：
Liu, Jianhua
中科院分区：
文献类型：
--
作者：
Liu, Xu;Clare, Lindsay;Liu, Jianhua
本文提出了一种新的设计方法，表明在一定条件下，在双线圈无线功率传输系统中，对于相同的负载功率，双面电感电容电容（LCC）补偿无线功率传输（LCC-WPT）系统比串联（SS）补偿无线功率传输（SS-WPT）系统更节能，特别关注寄生线圈和电容器电阻对无线功率传输的影响。 系统效率。为了对 SS 和 LCC WPT 系统进行公平比较，调整了直流 (DC) 链路电压，为两个系统设置相等的负载功率，同时使用相同的发射和接收线圈、线圈间距离和负载电阻。对实际系统的系统效率、组件上的电压应力以及功率器件的损耗等方面的系统性能进行了分析，在负载电阻方面比较了 LCC-WPT 系统和 SS-WPT 系统。比较了线圈未对准对两个系统的传输功率和效率的影响。推导了理论证明和满足目标的条件，并在两线圈WPT实用样机中进行了实际验证，分析与实验之间表现出良好的一致性。
A new design approach is presented in this paper to show that under certain conditions, in a two-coil wireless power transfer system, the double-sided inductor-capacitor-capacitor (LCC) compensated wireless power transfer (LCC-WPT) system can be more energy efficient than the series-series (SS) compensated wireless power transfer (SS-WPT) system for the same load power, with special attention being paid to the effect that the parasitic coil and capacitor resistances have on the system efficiency. To make a fair comparison between the SS and LCC WPT systems, the direct current (DC) link voltage was adjusted to set equal load power for the two systems whilst using identical transmit and receive coils, coil-to-coil distance and load resistance. The system performance in terms of the system efficiency, the voltage stresses on the components, and the losses in the power devices were analysed for a practical system, comparing the LCC-WPT system and the SS-WPT system with respect to the load resistance. The effect of coil misalignment on the transferred power and efficiency for the two systems was compared. The theoretical proof and the conditions for meeting the objective are derived and practically verified in a two-coil WPT practical prototype, showing good agreement between analysis and experiments.