| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a non-contact gate device capable of generating a magnetic field in a direction other than an original direction of the magnetic field by a power feed coil; and to provide a non-contact gate device capable of surely feeding power to an identified medium by generating a magnetic field in a plurality of directions by power feed coils arranged in a single direction. <P>SOLUTION: A magnetic field generation means has: a first power feed coil 12 disposed in one side part of a passing path 16; a second power feed coil 14 disposed in the other side part of a passing path 16 and installed oppositely to the first power feed coil 12; an excitation power source part 19 for driving the first and second power feed coils 12 and 14 at the same cycle; and a phase control part 21 for periodically changing a phase difference of an alternating current supplied to the first and second power feed coil 12 and 14. The magnetic field generation means is characterized in that combined magnetic lines of force generated in the passing path 16 are periodically directed in different directions. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
