United States Department of Transportation
i
Infrastructure Issues Related to In-Motion Wireless Power Transfer
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2017-07-01
[PDF-4.18 MB]
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Abstract:Integrating wireless power transfer (WPT) systems into the infrastructure represents a major hurdle in the large-scale adoption of electric vehicles (EVs). It is proposed that inductive power transfer (IPT)technology be directly embedded into a pavement structure. The successful integration of IPT systems has several requirements. First, the embedment process cannot interfere with the electrical performance of the IPT system. Also, the presence of the IPT system in the pavement structure cannot negatively affect the roadway’s lifespan. A direct embedment method into roadway materials was tested. The electrical properties of the IPT systems were monitored during the embedment process. Modifications were made to the IPT systems to optimize the electrical performance of the embedded coil. These methods were applied to a full scale embedded IPT system. This system will be used at Utah State’s Electric Vehicle Research (EVR) facility to dynamically charge EVs. The structural performance of directly embedded IPT systems has been evaluated. The tensile stresses that cause pavement cracking have been simulated in the surface of the embedded IPT test samples. These samples have been tested under cyclic loading conditions to simulate the fatigue conditions found in roadways. The stresses and number of loading cycles at which these samples developed cracking was recorded and analyzed. The electrical properties of the IPT samples were also measured and analyzed as the pads were testing under these loading conditions
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