To provide a magnetization device which can multipolar-magnetize with high precision by a stable magnetic field.
The magnetization device includes an annular magnetization yoke, and a magnetization coil mounted on the magnetization yoke. Many radial grooves extending from an inner diameter end to an outer diameter end are arranged in a circumferential direction on a magnetization surface positioned on an end surface of one side in a center axial direction of the magnetization yoke. An exciting electric wire for structuring a magnetization coil is buried in the radial grooves. A first exciting electric wire for structuring the magnetization coil is wound around the annular magnetization yoke spirally so that the first exciting electric wire is buried alternately in the radial grooves in the circumference direction, and a second exciting electric wire for structuring the magnetization coil is wound around the annular magnetization yoke spirally so that the second exciting electric wire is buried in the radial grooves between the radial grooves with the first exciting electric wire wound around.
Mayuko Wakuda
Koichiro Sakai