{"title":"基于自适应磁场分配器集成电路的6.78 MHz无线电力传输系统，可实现多个接收器同时充电，效率最高","authors":"Hao Qiu, M. Takamiya","doi":"10.23919/VLSICircuits52068.2021.9492440","DOIUrl":null,"url":null,"abstract":"We developed a 6.78 MHz wireless power transfer (WPT) system for simultaneous charging of multiple receiver (RX) coils. On the basis of the transmitter (TX)-RX and RX-RX coupling distinguished by the adaptive magnetic field distributor (AMFD) IC, the distribution of magnetic fields from the TX coils was optimized at each RX coil for the maximum efficiency. A 2-TX 2-RX WPT system was implemented with the AMFD ICs fabricated in 1.8 V, 180 nm CMOS process. Compared with the conventional method, the system efficiency is increased from 8.9 % to 61 % with the load power of 173 mW.","PeriodicalId":106356,"journal":{"name":"2021 Symposium on VLSI Circuits","volume":"8 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2021-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"A 6.78 MHz Wireless Power Transfer System for Simultaneous Charging of Multiple Receivers with Maximum Efficiency using Adaptive Magnetic Field Distributor IC\",\"authors\":\"Hao Qiu, M. Takamiya\",\"doi\":\"10.23919/VLSICircuits52068.2021.9492440\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"We developed a 6.78 MHz wireless power transfer (WPT) system for simultaneous charging of multiple receiver (RX) coils. On the basis of the transmitter (TX)-RX and RX-RX coupling distinguished by the adaptive magnetic field distributor (AMFD) IC, the distribution of magnetic fields from the TX coils was optimized at each RX coil for the maximum efficiency. A 2-TX 2-RX WPT system was implemented with the AMFD ICs fabricated in 1.8 V, 180 nm CMOS process. Compared with the conventional method, the system efficiency is increased from 8.9 % to 61 % with the load power of 173 mW.\",\"PeriodicalId\":106356,\"journal\":{\"name\":\"2021 Symposium on VLSI Circuits\",\"volume\":\"8 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2021-06-13\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"2021 Symposium on VLSI Circuits\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.23919/VLSICircuits52068.2021.9492440\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"2021 Symposium on VLSI Circuits","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.23919/VLSICircuits52068.2021.9492440","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
A 6.78 MHz Wireless Power Transfer System for Simultaneous Charging of Multiple Receivers with Maximum Efficiency using Adaptive Magnetic Field Distributor IC
We developed a 6.78 MHz wireless power transfer (WPT) system for simultaneous charging of multiple receiver (RX) coils. On the basis of the transmitter (TX)-RX and RX-RX coupling distinguished by the adaptive magnetic field distributor (AMFD) IC, the distribution of magnetic fields from the TX coils was optimized at each RX coil for the maximum efficiency. A 2-TX 2-RX WPT system was implemented with the AMFD ICs fabricated in 1.8 V, 180 nm CMOS process. Compared with the conventional method, the system efficiency is increased from 8.9 % to 61 % with the load power of 173 mW.
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