1. Field of the Invention
The present invention relates to a noise reduction cable.
2. Description of the Related Art
Japanese Unexamined Patent Application Publication No. 5-325658, for example, proposes an electromagnetic shielding cable that prevents noise generated due to variable speed control of an alternating-current motor from leaking to the outside.
The electromagnetic shielding cable includes three electric wires that supply a three-phase alternating current to the motor, each electric wire being covered with a sub-shielding layer; three drain wires that are disposed between the electric wires, each drain wire including a conductor and a semiconductor resin that covers the periphery of the conductor; and a main shielding layer that covers the electric wires and the drain wires with an insulating separator interposed therebetween. The sub-shielding layer is composed of a laminated tape made of aluminum and either nylon or polyester. The main shielding layer has a two-layer structure including a copper tape layer and an iron tape layer.
Since the electromagnetic shielding cable of the related art includes the main shielding layer at the periphery thereof, the cable is not satisfactorily flexible.