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崔宇勝,李鎔求,金周弘 동국대학교 산업기술대학원 1993 산업기술논문집 Vol.1 No.-
The measurement method using voltage ratio is able to measure a coupling coefficient k which is a parameter of power transmission between coils. We verified that the coupling coefficient k between couples of the similar coil with different size equal reciprocally and the coupling coefficient k between two coils on the same axle differ little from the mutual diameter ratio. The coupling coefficient k on the distance between the center point of coils have linear change characteristics.