US 12,438,431 B2
Electromagnetic actuator device and suspension device provided with same
Ryosuke Hoshi, Tokyo (JP); Yasuaki Aoyama, Tokyo (JP); and Nobuyuki Ichimaru, Hitachinaka (JP)
Assigned to HITACHI ASTEMO, LTD., Ibaraki (JP)
Appl. No. 18/269,651
Filed by Hitachi Astemo, Ltd., Hitachinaka (JP)
PCT Filed Oct. 15, 2021, PCT No. PCT/JP2021/038197
§ 371(c)(1), (2) Date Jun. 26, 2023,
PCT Pub. No. WO2022/163029, PCT Pub. Date Aug. 4, 2022.
Claims priority of application No. 2021-010173 (JP), filed on Jan. 26, 2021.
Prior Publication US 2024/0063704 A1, Feb. 22, 2024
Int. Cl. H02K 41/03 (2006.01); B60G 17/015 (2006.01); H02K 11/21 (2016.01)
CPC H02K 41/031 (2013.01) [B60G 17/015 (2013.01); H02K 11/21 (2016.01)] 9 Claims
OG exemplary drawing
 
1. An electromagnetic actuator device comprising:
a magnet portion;
an armature that moves relative to the magnet portion; and
a sensor that detects a magnetic pole position of the armature, wherein the sensor is disposed on a side of the one tooth end portion,
wherein the armature includes a plurality of teeth formed in a relative movement direction, a plurality of slots formed between the plurality of teeth, a yoke that connects the plurality of teeth, and a winding wound around the plurality of slots,
the magnet portion includes a plurality of magnets that face the plurality of teeth via an air gap and are disposed in the relative movement direction, and
a relationship between a minimum sectional area Sc1 of one tooth end portion of the armature and a minimum sectional area Sc2 of another 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.