Importance

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Abstract

There is disclosed an electric power supply device including: a plurality of coils that respectively generate alternating current signals depending on a variation in magnetic flux; a plurality of rectifying units that are respectively connected to the plurality of coils, to respectively convert the alternating current signals generated by the plurality of coils connected, into a plurality of direct current signals; a restriction unit that restricts reverse flow of the plurality of direct current signals converted by the plurality of rectifying units; an electric power supply unit that extracts and supplies electric power from the plurality of direct current signals flowing through the restriction unit; and an output unit that specifies a direct current signal at a highest level among the plurality of direct current signals converted by the plurality of rectifying units, and outputs electronic information specifying which of the plurality of coils is connected to one of the plurality of rectifying units that has generated the direct current signal at the highest level.

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First Claim