US 12,264,710 B2
Magnetic bearing with coaxial eddy current displacement sensor
Hyeong Joon Ahn, Seoul (KR)
Assigned to FOUNDATION OF SOONGSIL UNIVERSITY-INDUSTRY COOPERATION, Seoul (KR)
Appl. No. 18/012,862
Filed by FOUNDATION OF SOONGSIL UNIVERSITY-INDUSTRY COOPERATION, Seoul (KR)
PCT Filed Apr. 16, 2021, PCT No. PCT/KR2021/004832
§ 371(c)(1), (2) Date Dec. 23, 2022,
PCT Pub. No. WO2021/261731, PCT Pub. Date Dec. 30, 2021.
Claims priority of application No. 10-2020-0077476 (KR), filed on Jun. 25, 2020.
Prior Publication US 2023/0265891 A1, Aug. 24, 2023
Int. Cl. F16C 32/04 (2006.01); F16C 41/00 (2006.01)
CPC F16C 41/007 (2013.01) [F16C 32/0474 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A magnetic bearing having a colocated eddy-current displacement sensor, the magnetic bearing comprising:
an electromagnet unit including a circular casing having a hollow portion therein, the electromagnet unit having a plurality of electromagnets disposed along an inner periphery of the circular casing;
an amplifier unit coupled to one side of the electromagnet unit;
a coil wiring unit coupled to another side of the electromagnet unit; and
a plurality of sensor units disposed along an inner periphery of the electromagnet unit and each having two opposite ends respectively coupled to the coil wiring unit and the amplifier unit, the plurality of sensor units being disposed between the coil wiring unit and the amplifier unit,
wherein each of the plurality of sensor units is disposed to be co-located with a suspended body supported by the electromagnet unit, the plurality of sensor units being configured to measure a displacement of the suspended body,
wherein each of the plurality of sensor units comprises:
a sensor substrate having a PCB;
a sensor coil disposed on the sensor substrate; and
protrusion bodies protruding from four corners of the sensor substrate in a longitudinal direction of the sensor substrate,
wherein the protrusion bodies are configured to be fitted into holes defined in the coil wiring unit and the amplifier unit.