GROUND COIL DEVICE FOR MAGNETIC LEVITATING TYPE RAILWAY

摘要

PROBLEM TO BE SOLVED: To enhance propulsion efficiency by reducing eddy current loss of a propulsion coil and to reduce power consumption. SOLUTION: The ground coil device is installed on a track for a magnetic levitating type railway and is constituted by winding a cable. In the used cable 31, a twisted wire conductor 33 is constituted by twisting a plurality of element wires 32 in which an insulation material 32b is covered on a naked element wire 32a. An inner semiconductive layer 34, an insulation layer 35 and an outer semiconductive layer 36 are formed on a periphery of the twisted wire conductor 33 in the order from the inner side. A sheath buried with a wire shield 37 is further formed on the periphery. The eddy current is induced on the twisted wire conductor 33 by variation magnetic field by an ultra-conductive magnet at a vehicle side, however, since the element wire 32 of the twisted wire conductor 33 is the insulation element wire, the eddy current induced on the twisted wire conductor 33 is suppressed and the eddy current loss is reduced. COPYRIGHT: (C)2006,JPO&NCIPI