Patent ID: 6489874
Filing Date: 2002-12-03
Classification: H01F

Abstract:
A non-contact electric power transmission apparatus comprising:a primary unit comprising: a primary core having a first facing surface and a first winding axis substantially parallel to the first facing surface; at least one power primary winding wound around the first winding axis of the primary core; and at least one signal secondary winding wound around the first winding axis of the primary core and provided to be apart from the at least one power primary winding to form a primary gap between the at least one power primary winding and the at least one signal secondary winding; and a secondary unit comprising: a secondary core having a second facing surface and a second winding axis substantially parallel to the second facing surface; at least one power secondary winding wound around the second winding axis of the secondary core; at least one signal primary winding wound around the second winding axis of the secondary core and provided to be apart from the at least one power secondary winding to form a secondary gap between the at least one power secondary winding and the at least one signal primary winding; and the secondary unit being configured to be placed with respect to the primary unit such that the second facing surface faces the first facing surface and such that said at least one power secondary winding and said at least one signal primary winding are electromagnetically connected to said at least one power primary winding and said at least one signal secondary winding, respectively.