Wireless Power Transfer System for 3-D stacked Multiple Receivers Switching between Single and Dual Frequency Modes

Yanagawa, Shusuke; Shimizu, Ryo; Hamada, Mototsugu; Kuroda, Tadahiro

doi:10.1109/mwscas.2018.8623964

Cited by 1 publication

(1 citation statement)

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“…The system has an efficiency of 24%-29% at the resonant frequencies of 20 MHz, 22.5 MHz, and 25 MHz. A dual-frequency mode for 3-D stacked multiple receivers is developed in Yanagawa et al [28] to increase the system efficiency. The dual-frequency mode is formulated using an optimization methodology involving tuning capacitor values to achieve an efficiency of 58.7% at 6.78 MHz and 13.56 MHz.…”

Section: Introductionmentioning

confidence: 99%

Time-Sharing Control Strategy for Multiple-Receiver Wireless Power Transfer Systems

Cai

Lai

et al. 2020

Energies

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The cross-coupling effect between the induction coils of a multiple-receiver wireless power transfer (MRWPT) system severely weakens its overall performance. In this paper, a time-sharing control strategy for MRWPT systems is proposed to reduce the cross-coupling between receiver coils. An active-bridge rectifier is introduced to the receivers to replace the uncontrollable rectifier to achieve synchronization of the time-sharing control. The synchronization signal generated by an active-bridge rectifier can be directly used to realize the synchronization of time-sharing control and hence saved the traditional zero-crossing point detection circuits for time-sharing circuits. Moreover, the proposed time-sharing system has the advantages of both operating under a resistance-matching condition and providing target output voltage for each receiver. Furthermore, a voltage control strategy was developed to provide both high efficiency and a target output voltage for each receiver. Finally, the simulation and experimental results show that the time-sharing MRWPT system reduced the cross-coupling effect between the receiver coils, and the voltage control strategy provided both a high efficiency and a target output voltage for each receiver.

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Section: Introductionmentioning

confidence: 99%