A 6.78-MHz Wireless Power Transfer System with Voltage-/Current-Mode 0X/1X Regulating Rectifier and Global-Loop Power Control

Bing Jen Wu, Dao Han Yao, Po Hung Chen

研究成果: Conference contribution同行評審

摘要

Wireless power transfer (WPT) has great potential to be adopted in various applications, such as implantable medical devices (IMDs) and radio frequency identification (RFID) tags. However, the transmission distance and received power level vary due to coil misalignment and environmental conditions. Figure 1 compares the conventional WPT system with the proposed design. [1] employs a full-bridge rectifier with local-loop regulation to eliminate the regulation stage in the receiver (Rx). The global-loop power control (GLPC) is also combined to improve the power conversion efficiency (PCE), but the Rx voltage conversion efficiency (VCE) is less than one, limiting the transmission distance and input power range. Resonant-type receivers [2]-[6] resonate the LC tank for several cycles to accumulate the energy, which improves the VCE and minimum input power level of the Rx. [2] presents the resonant voltage mode operation to isolate the Rx coil from the output for resonating, but an extra off-chip inductor is needed. [3] demonstrates a resonant current mode (RCM) Rx at 13.56 MHz. However, VCE improvement is limited, and the output voltage is not regulated. [4], [5] present the voltage-current mode (VCM) Rx that combines the RCM and voltage mode (VM) operations to extend the input-voltage range while regulating the output, but the operating frequency is only 1 MHz. Without GLPC, transmitters deliver too much power than the required output under a light load condition, which limits efficiency.

原文English
主出版物標題2023 IEEE Asian Solid-State Circuits Conference, A-SSCC 2023
發行者Institute of Electrical and Electronics Engineers Inc.
ISBN(電子)9798350330038
DOIs
出版狀態Published - 2023
事件19th IEEE Asian Solid-State Circuits Conference, A-SSCC 2023 - Haikou, China
持續時間: 5 11月 20238 11月 2023

出版系列

名字2023 IEEE Asian Solid-State Circuits Conference, A-SSCC 2023

Conference

Conference19th IEEE Asian Solid-State Circuits Conference, A-SSCC 2023
國家/地區China
城市Haikou
期間5/11/238/11/23

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