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- W2044064145 abstract "This paper proposes that transmitter-to-receiver resonator efficiency can be enhanced by the novel combination of resonator and switching controller at the receiver side. More specifically, the switching controller modulates the load resistance such that the receiver resonance is amplified. This increases the loaded-Q, reflected resistance, and, subsequently, overall efficiency and distance range. The efficiency and distance range are superior than resonator-only receivers, despite of losses from the switching controller itself. This breaks the common routine that typical switching converters only lower the power flow and efficiency when they are inserted in wireless power chain. Moreover, the scheme solves the common problem of load-variation-induced efficiency degradation. More specifically, if the present load value is deviated from optimal point, the proposed controller adjusts the effective load resistance to amplify the reflected resistance. The loaded-Q amplification is easily controlled simply by changing the duty ratio of switching controller. This is more feasible than traditional impedance transformation network whose control requires large array of capacitor-switch matrix or movement of coil position. The efficiencies with and without the switching-controlled resonance amplification are 60.2% and 51.7%, respectively, for a 20-W loading at 15-cm distance for a 20 cm × 16 cm receiver." @default.
- W2044064145 created "2016-06-24" @default.
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- W2044064145 date "2015-02-01" @default.
- W2044064145 modified "2023-09-23" @default.
- W2044064145 title "Wireless Power Transfer Resonance Coupling Amplification by Load-Modulation Switching Controller" @default.
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- W2044064145 doi "https://doi.org/10.1109/tie.2014.2336627" @default.
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