Dipolring-Magnetkreis

Details

Veröffentlichungs-Nr.

EP2450918

Aktenzeichen

EP11187866

Anmeldetag

4. November 2011

Veröffentlichung

24. April 2019

Erteilung

24. April 2019

Rechtsraum

EP

IPC

H01F7/02

Abstract

To provide a dipole-ring magnetic circuit (1) having a greater magnetic field strength and demagnetization resistance. A dipole-ring magnetic circuit (1) including permanent magnet pieces (3) arranged in an annular shape that magnetization directions make one rotation halfway around the shape, in which the permanent magnet pieces produce a substantially one-directional magnetic field (9) at a uniform strength in an interior space (7) surrounded by the permanent magnet pieces; two or more specified magnet pieces have a magnetization direction of forming an angle of from 150 to 210 degrees with respect to the direction of the magnetic field which is on a plane perpendicular to a central axis of the annular shape, and are called "specified magnet pieces"; and at least in each of the specified magnet pieces, a value of magnetic coercive force increases with decreasing distance to the interior space along a radial direction of the annular shape.

Anmelder

Firma

Shin-Etsu Chemical Co., Ltd.

Land

🇯🇵 Japan

Fachgebiete