Patent ID: 9093216
Filing Date: 2015-07-28
Classification: H01F,H02J

Abstract:
1. A non-contact power transmission apparatus comprising: a primary coil generating a magnetic flux; a secondary coil disposed facing the primary coil to receive power in a non-contact manner from the primary coil by electromagnetic induction so that a magnetic flux of the primary coil can pass through the coil; a magnetic-substance layer disposed to cover a side opposite a side of the secondary coil facing the primary coil so that the magnetic flux of the primary coil that passed through the secondary coil can pass; a magnet portion disposed to be able to switch two magnetic poles and configured to generate a magnetic flux that is larger than a difference between the maximum value of the first magnetic flux generated at the primary coil and the saturated magnetic flux of the magnetic-substance layer and that passes through the magnetic-substance layer in a direction in which the magnetic-substance layer spreads; and a magnetic pole switching unit that detects a direction of the first magnetic flux generated at the primary coil, and switches a magnetic pole of the magnet portion to generate a magnetic flux in a direction opposite the direction of the magnetic flux.