Boundary of Soft-switching for Efficient Operation of Bi-directional IPT Systems
Boundary of Soft-switching for Efficient Operation of Bi-directional IPT Systems
复制标题
双向 IPT 系统高效运行的软开关边界
DOI：
10.1109/wow47795.2020.9291279
复制
发表时间：
2020
期刊：
影响因子：
--
通讯作者：
G. Covic
中科院分区：
文献类型：
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作者：
Ryosuke Ota;D. Thrimawithana;U. Madawala;G. Covic
在感应电能传输（IPT）系统中，使用了SiC MOSFET等高速开关器件，但这些器件在开关时会产生电磁噪声。因此，人们希望将软开关技术应用于IPT系统中的变换器以降低噪声。然而，为了实现软开关操作，有必要利用来自谐振网络的无功电流，然而这会导致额外的传导损耗。因此，为了最小化传导损耗，本文重新考虑软开关IPT系统下的效率特性。此外，提出了提高系统效率的指导思想，并通过实验验证了其有效性。在该实验中，与传统方法相比，在最大传输功率下，整个系统的效率提高了0.8%。
In inductive power transfer (IPT) systems, highspeed switching devices such as SiC MOSFETs are used, though, these devices generate electromagnetic noise at switching. Therefore, it is desirable to apply soft-switching technique to the converters in IPT systems to reduce the noise. However, in order to achieve soft-switching operation, it is necessary to utilize the reactive current from the resonant network, however this causes additional conduction loss. Therefore, in order to minimize conduction loss, this paper reconsiders the efficiency characteristics under soft-switching IPT systems. In addition, a guideline for improving system efficiency is shown, and its effectiveness is confirmed by experiment. In this experiment, the efficiency of the overall system is improved by 0.8 % at the maximum transmission power in comparison with conventional methods.