COIL UNIT AND DEVICE FOR THE INDUCTIVE TRANSFER OF ELECTRICAL ENERGY
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United States of America Patent
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Issued Date -
Dec 31, 2015
app pub date -
Feb 4, 2014
filing date -
Feb 5, 2013
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Abstract
A coil unit for the inductive transfer of electrical energy, including a coil and a flux guide unit for guiding a magnetic flux generated during operation of the coil, with the coil and/or the flux guide unit surrounded by stray field screening, and a device for the inductive transfer of electrical energy between a fixed primary coil unit and a secondary coil unit mounted on a movable load. The coil unit and device for the inductive transfer of electrical energy have a small and weak stray field, do not exceed the desired specifications for the maximum flux density outside the vehicle, and improve the efficiency of inductive energy transfer to the vehicle having a coil unit in which the stray field screening is mounted at a lateral distance from the flux guide unit and the coil.
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