Apparatus for inductively transmitting electrical energy
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United States of America Patent
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Jan 10, 2017
Grant Date -
Nov 6, 2014
app pub date -
Aug 23, 2012
filing date -
Oct 17, 2011
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Abstract
An apparatus for inductively transmitting electrical energy from a stationary unit to a mobile unit which is located adjacent to the stationary unit. The apparatus has a coil and a flux guide unit for guiding a magnetic flux occurring during operation of the apparatus with at least one ferromagnetic body, which consists of a multiplicity of individual elements. The flux guide unit has the basic shape of a plate and is arranged on one side of the coil perpendicular to the winding axis thereof in such a way that it covers the cross-sectional area of the coil at least partially. The ferromagnetic body includes individual elements with anisotropic magnetic permeability and has, overall, anisotropic magnetic permeability. In a viewing plane perpendicular to the winding axis of the coil, the individual elements of the ferromagnetic body are aligned with respect to the coil in those regions in which a ferromagnetic body with anisotropic permeability covers winding sections of the coil, in such a way that the preferred direction of magnetic permeability, in which the magnetic permeability has its greatest magnitude in the viewing plane, is at least approximately perpendicular to the winding sections of the coil.
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