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Long-distance wireless power transfer system powering multiple loads with constant voltage outputs using S-SP compensation
IET Power Electronics ( IF 2 ) Pub Date : 2020-07-01 , DOI: 10.1049/iet-pel.2019.0880
Chenwen Cheng 1 , Zhe Zhou 2 , Weiguo Li 2 , Jianghua Lu 1 , Zhanfeng Deng 2 , Chunting Chris Mi 1
Affiliation  

This paper proposes a long-distance multi-load wireless power transfer (WPT) system with a constant voltage (CV) output for each load. A repeater unit consisting of two bipolar repeater coils is designed to power the load. Multiple repeater units are placed in a line and the power can be transferred from one unit to the next. Each repeater unit corresponds to one load and multiple loads can be powered simultaneously. The two repeater coils in the same repeater unit are placed perpendicularly to eliminate the magnetic coupling between them. In each repeater unit, a compensation capacitor is placed in series with the transmitting coil while two extra compensation capacitors form a series-parallel (SP) structure for the receiving coil. When neglecting the coil's parasitic resistance, the CV characteristics can be obtained, which enables the independent and flexible power control of each load. Moreover, the influence of the parasitic resistances on the system performance is analysed. Such a system is especially suitable for powering the gate drivers in a high-voltage converter where multiple insulated gate bipolar transistors (IGBTs) are connected in series. An experimental setup with six loads is constructed to validate the proposed system. The maximum system efficiency can reach 88.1%.

中文翻译:

使用S-SP补偿为恒定电压输出的多个负载供电的远程无线电力传输系统

本文提出了一种远程多负载无线功率传输(WPT)系统,该系统为每个负载提供恒定电压(CV)输出。由两个双极型中继器线圈组成的中继器单元旨在为负载供电。多个中继器单元排列成一条线,电源可以从一个单元传输到下一个。每个转发器单元对应一个负载,可以同时为多个负载供电。同一中继器单元中的两个中继器线圈垂直放置,以消除它们之间的磁耦合。在每个转发器单元中,一个补偿电容器与发射线圈串联放置,而两个额外的补偿电容器形成一个用于接收线圈的串并联(SP)结构。忽略线圈的寄生电阻,可以获得CV特性,这样就可以独立,灵活地控制每个负载的功率。此外,分析了寄生电阻对系统性能的影响。这种系统特别适合为高压转换器中的栅极驱动器供电,在高压转换器中,多个绝缘栅双极型晶体管(IGBT)串联连接。构建具有六个负载的实验装置以验证所提出的系统。最高系统效率可以达到88.1%。构建具有六个负载的实验装置以验证所提出的系统。最高系统效率可以达到88.1%。构建具有六个负载的实验装置以验证所提出的系统。最高系统效率可以达到88.1%。
更新日期:2020-07-03
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