JPS56140610A - Contactless power feeding device - Google Patents

Abstract

PURPOSE:To transfer electric power to a plurality of moving equipment by arranging a plurality of cores with primary windings in connection with a power source, providing a core with a secondary windings with fine gaps being provided with respect to said cores at the opposing positions, thereby providing the power to the secondary side. CONSTITUTION:A plurality of primary cores 1, to which primary windings 1a of the transformer are wound, are arranged. The secondary core 2 around which secondary windings 2a are wound is provided at the positions opposing said arrangement of cores 1 with fine gaps being provided. The current from a high-frequency AC power source E is supplied to said primary windings 1a via proximity switches 4-0, 4-1,..., the power from the secondary windings 2a is supplied to a load R such as the moving equipment and the like by the movement of the secondary core 2. At the front and rear in the advancing direction of the secondary core 2, are provided dummy cores 3 which are not coupled magnetically with the secondary core 2 and linked with the neighbouring primary windings 1a with a specified distance being provided. Thus, abnormal current caused when the power from the power source E is stopped is interrupted, and the unstability of the power transfer performance is avoided.