| 摘要 |
PROBLEM TO BE SOLVED: To provide a coil device for non-contact power supply including a magnetic sheet that can be made thin, excellent in magnetic shielding, and hard to reach magnetic saturation.SOLUTION: A coil device 1 for non-contact power supply includes a magnetic sheet 10, and a coil 20 provided on the magnetic sheet 10. The coil 20 is formed by winding an insulation coated conductor planarly and spirally. The magnetic sheet 10 is composed of flat magnetic powder, spherical magnetic powder, and resin. The flat magnetic powder and spherical magnetic powder are composed, respectively, of one or both of metal magnetic powder and amorphous magnetic powder. The weight ratio of the flat magnetic powder to the magnetic powder composing the magnetic sheet 10 is 3-5%, and the reminder is spherical magnetic powder.SELECTED DRAWING: Figure 1 |
