公开(公告)号：US20240063704A1

公开(公告)日：2024-02-22

申请号：US18269651

申请日：2021-10-15

Applicant: Hitachi Astemo, Ltd.

Inventor： Ryosuke HOSHI ,  Yasuaki AOYAMA ,  Nobuyuki ICHIMARU

IPC: H02K41/03 ,  H02K11/21 ,  B60G17/015

CPC classification number: H02K41/031 ,  H02K11/21 ,  B60G17/015

Abstract: An electromagnetic actuator device reduces pulsation and improves thrust, and includes: a magnet; and an armature that moves relative to the magnet. The armature includes: a plurality of teeth formed in a relative movement direction; a plurality of slots between the plurality of teeth; a yoke connecting the plurality of teeth; and a winding around the plurality of slots. The magnet includes a plurality of magnet portions facing the plurality of teeth via a gap and are disposed in the relative movement direction. A relationship between a minimum sectional area Sc1 of one tooth end portion of the armature and a minimum sectional area Sc2 of the other tooth end portion is Sc1>Sc2; and a relationship between the minimum sectional area Sc2 of the other tooth end portion and a sectional area Sy of the yoke in a direction crossing the relative movement direction is Sc2≥Sy.

公开(公告)号：US20230226868A1

公开(公告)日：2023-07-20

申请号：US17928878

申请日：2021-04-16

Applicant: Hitachi Astemo, Ltd.

Inventor： Yasuaki AOYAMA ,  Ryosuke HOSHI ,  Nobuyuki ICHIMARU

IPC: B60G15/04 ,  H02K41/03 ,  B60G17/06 ,  B60G17/015

CPC classification number: B60G15/04 ,  H02K41/031 ,  B60G17/06 ,  B60G17/0157 ,  B60G2202/25 ,  B60G2202/422 ,  B60G2204/62 ,  B60G2206/41 ,  B60G2500/104 ,  B60G2600/24 ,  B60G2800/162

Abstract: The present invention provides an electromagnetic suspension capable of suppressing interference with other components and devices, being mounted in a narrow space, and having a small thrust pulsation, a large thrust, and a high damping performance even for a high-frequency vibration source. An electromagnetic suspension of the present invention includes a linear motor that includes an armature and a permanent magnet portion, the armature including a winding and a magnetic body, the permanent magnet portion being disposed on an outer periphery of the armature and including a permanent magnet and a cylindrical magnetic body, and the armature and the permanent magnet portion being relatively linearly driven in the linear motor, in which a recess recessed from an outer peripheral portion of the cylindrical magnetic body and a protrusion protruding from the outer peripheral portion are disposed on the same circumference of the outer peripheral portion of the cylindrical magnetic body.