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Title of Journal: J Cent South Univ

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Abbravation: Journal of Central South University

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Central South University

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DOI

10.1007/978-3-8349-8796-9_7

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2227-5223

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Middle range wireless power transfer systems with

Authors: Xin Chen Guixiang Zhang
Publish Date: 2015/06/12
Volume: 22, Issue: 6, Pages: 2127-2136
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Abstract

The equivalent twoport network model of a middle range wireless power transfer WPT system was presented based on strongly coupled multiple resonators The key parameters of the WPT system include selfinductance resistance parasitic capacitance mutual inductance and Sparameters of coils resonators were analyzed The impedance matching method was used to optimize load power and transmission efficiency of the multiresonator WPT system and the impedance matching method was realized through adjusting the distances between the coils and resonators Experiments show that the impedance matching method can effectively improve load power and transmission efficiency for middle range wireless power transfer systems with multiple resonators at distances up to 3 times the coil radius with efficiency more than 70 and load power also close to 35 W

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