As an application of wireless power transfer using sheetlike waveguide, electric vehicle charging is desirable. Charging problem is one of the key solutions to encourage broad use of electric vehicle, a promising approach to solve environment problems. The conventional charging system has several problems caused by contacts between terminals of the vehicle and the power supply. For example, there are the safety problem such as electric shock hazard caused by rain drops and dust, and the maintenance problem such as wear at points of contact. The wireless power transfer using microwave is considered as a solution. The authors put the sheet-like transmitter and receiver on the floor and the bottom of the vehicle, respectively. The authors use free access mat as the sheet-like waveguide in this paper. Free access mat has simple structure of two layers of patch array. Those patches are tightly coupled to each other. The electromagnetic wave is concentrated into the free access mat and transmits in a small loss. The general antennas couples to it with small loss. Good coupling provides efficient power transfer. One or two-dimensional array of the free access mat is available to a variety of uses of the wireless power transfer. It presents wireless energy transfer along the transmission line or through the planar waveguide. In addition it is easy to use. One can just put the device on the free access mat and power is transferred by coupling. Free access mat has very small effect of interferences. Devices only on the free access mat can couple to it. Devices out of the free access mat barely couple to it. It is safe to use. In this paper the authors present the basic study of wireless power transfer using one-dimensional array of the free access mat. The authors design the free access mat which has the center frequency around 2.45 GHz. The authors investigate good coupling, well confined coupling height and good position tolerance by simulation and measurement.
Wireless power transfer using sheet-like waveguide
Drahtlose Energieübertragung mit schichtartigen Wellenleitern
2009
4 Seiten, 10 Bilder, 4 Quellen
Aufsatz (Konferenz)
Datenträger
Englisch
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