Abstract
Users are increasing their demands on the home appliances they utilize by requiring them to be powered anywhere and anytime. In order to satisfy this need, wireless power transfer helps transfer energy between objects without conductors. For domestic scenarios, strongly magnetic resonant technology offers a method to enable wireless power transfer, even when there exist intermediate non-metallic objects between the wireless power source and the load. This paper reviews this technology with a comprehensive explanation about its fundamentals and physical principles. Some practical issues are also analyzed in this work. Particularly, how the control can be designed and how the coils are built. Finally, this paper also addresses the study about the features of other technologies to power home appliances without conductors. They can be foreseen as the technological competitors of strongly coupled magnetic resonant systems.
Highlights
Wireless Power Transfer (WPT) is a group of technologies that allow for the transfer of energy between two objects without conductors [1]
For this Strongly Coupled Magnetic Resonant (SCMR) experiment, if we vary the distance between the transmitter and the receiver coil, we are forcing to the variation on the mutual inductance too
Wireless Power Transfer encompasses a group of technologies that allow for the power transmission from a power source to a load through an air gap, without any wire connecting both
Summary
Wireless Power Transfer (WPT) is a group of technologies that allow for the transfer of energy between two objects (the power source and the load) without conductors [1]. In a similar way to magnetic-based near-field technologies, the power transfer with a SCMR system is not dramatically altered when there are non-metallic objects in the area separating the power transmitter and the load. This capability of power transfer, which is especially convenient for home appliances, is not supported by microwave or the laser-based wireless power transfer solutions. The contributions of the paper are: Explanation of the SCMR theory, making clear the difference with inductive and resonant systems, with which more researchers are familiar This involves the description of the components used in these systems, their electrical performance and the variables that need to be controlled for a proper functioning that fulfils the requirements previously mentioned for home environments.
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