公开(公告)号：US09691534B2

公开(公告)日：2017-06-27

申请号：US14421096

申请日：2013-08-06

Applicant: NTN CORPORATION

Inventor： Toru Takahashi ,  Shintarou Ueno

IPC: H01F7/20 ,  H01F13/00 ,  G01D5/245

CPC classification number: H01F13/003 ,  G01D5/2451

Abstract: In a magnetization device, while an annular magnetic body including plural rows of annular un-magnetized magnetic encoder tracks which are arranged adjacent to each other and integrated therewith is rotated, magnetization is performed, thereby providing a magnetic encoder. The magnetization device includes: a magnetizing yoke including a pair of opposed end portions opposed to each other across a magnetic gap; an exciting coil wound on the magnetizing yoke; a magnetization power source supplying a magnetizing current to the exciting coil to pass magnetic flux between the opposed end portions; and a magnetic shield which is provided to the magnetizing yoke and shields flow of the magnetic flux to the rows of magnetic encoder tracks other than a magnetization target.

公开(公告)号：US10529477B2

公开(公告)日：2020-01-07

申请号：US15566547

申请日：2016-04-07

Applicant: NTN CORPORATION

Inventor： Toru Takahashi ,  Shintarou Ueno

IPC: H01F7/20 ,  H01F13/00 ,  H01F27/36

Abstract: A magnetizing device includes a magnetization yoke including a pair of magnetization heads confronting each other through a magnetic gap, an excitation coil wound around the magnetization yoke, and a magnetization power supply that supplies a magnetizing current to the excitation coil to generate magnetic flux between the magnetization heads. A magnetic shield is provided on the magnetization yoke. The magnetic shield is spaced apart from one of the magnetization heads with a gap being formed therebetween along a direction in which the plurality of magnetic encoder tracks are arranged. The magnetic shield blocks a flow of magnetic flux that is present outside a defined extension of a flow of the magnetic flux between the pair of magnetization heads. The magnetic shield is of such a geometry that a thickness thereof progressively decreases towards the one of the magnetization heads.

公开(公告)号：US20150243427A1

公开(公告)日：2015-08-27

申请号：US14421096

申请日：2013-08-06

Applicant: NTN CORPORATION

Inventor： Toru Takahashi ,  Shintarou Ueno

IPC: H01F13/00

CPC classification number: H01F13/003 ,  G01D5/2451

Abstract: In a magnetization device, while an annular magnetic body including plural rows of annular un-magnetized magnetic encoder tracks which are arranged adjacent to each other and integrated therewith is rotated, magnetization is performed, thereby providing a magnetic encoder. The magnetization device includes: a magnetizing yoke including a pair of opposed end portions opposed to each other across a magnetic gap; an exciting coil wound on the magnetizing yoke; a magnetization power source supplying a magnetizing current to the exciting coil to pass magnetic flux between the opposed end portions; and a magnetic shield which is provided to the magnetizing yoke and shields flow of the magnetic flux to the rows of magnetic encoder tracks other than a magnetization target.

Abstract translation: 在磁化装置中，虽然包括排列成彼此相邻并与之成一体的多排环形非磁化磁编码器轨道的环形磁体被旋转，但是磁化被执行，从而提供磁编码器。 磁化装置包括：磁化轭，其包括跨越磁隙彼此相对的一对相对端部; 缠绕在磁轭上的励磁线圈; 向励磁线圈供给磁化电流以在相对的端部之间传递磁通的磁化电源; 以及磁屏蔽，其被提供给磁化轭，并且将磁通的流动屏蔽到除磁化目标之外的磁性编码器轨道的行。