Magnetic bearing, rotary apparatus comprising such a magnetic bearing and method for manufacturing such a magnetic bearing

Patent metadata

Field	Value
Publication number	US-2016178005-A1
Application number	US-201514945599-A
Country	US
Kind code	A1
Filing date	Nov 19, 2015
Priority date	Nov 27, 2014
Publication date	Jun 23, 2016
Grant date	—

Abstract

A magnetic bearing, adapted to equip a rotary apparatus. The magnetic bearing comprises: an actuator sub-assembly provided with a magnetic base and at least three actuator bobbins mounted on the magnetic base, and a sensor sub-assembly provided with at least three magnetic sensors associated with the actuator bobbins. At least one sub-assembly amidst the actuator sub-assembly and the sensor sub-assembly comprises at least three sectors mounted together. Each sector includes at least one actuator bobbin when the sector belongs to the actuator sub-assembly, or at least one magnetic sensor when the sector belongs to the sensor sub-assembly. The invention also concerns a rotary apparatus comprising such a magnetic bearing and a method for manufacturing such a magnetic bearing.

First claim

What is claimed is:

1 . A magnetic bearing, adapted to equip a rotary apparatus, the magnetic bearing comprising:
an actuator sub-assembly provided with a magnetic base and at least three actuator bobbins mounted on the magnetic base; and a sensor sub-assembly provided with at least three magnetic sensors associated with the actuator bobbins, wherein at least one sub-assembly amidst the actuator sub-assembly and the sensor sub-assembly comprises at least three sectors mounted together, wherein each sector includes one of:
at least one actuator bobbin when the sector belongs to the actuator sub-assembly, or
at least one magnetic sensor when the sector belongs to the sensor sub-assembly.

2 . The magnetic bearing according to claim 1 , wherein the actuator sub-assembly comprises at least three sectors mounted together,
each sector comprising at least one actuator horn and an actuator bobbin mounted on the actuator horn.

3 . The magnetic bearing according to claim 2 , wherein the actuator sub-assembly comprises four sectors mounted together,
each sector extending over an angle of 90 degrees around a central axis of the magnetic bearing.

4 . The magnetic bearing according to claim 2 , wherein each sector of the actuator sub-assembly comprises two actuator horns made together of a single part and two actuator bobbins mounted on the actuator horns.

5 . The magnetic bearing according to claim 2 , wherein each magnetic sensor is positioned at a junction between two sectors of the actuator sub-assembly.

6 . The magnetic bearing according to claim 1 , the sensor sub-assembly further comprising at least three sectors mounted together and each comprising at least one magnetic sensor.

7 . The magnetic bearing according to claim 1 , the sensor sub-assembly further comprising a base and an intermediate magnetic support which is provided with sensor horns and is fastened between the base and each magnetic sensor received on one of the sensor horns.

8 . The magnetic bearing according to claim 7 , the intermediate support further comprising a main portion and two sensor horns forming a fork.

9 . The magnetic bearing according to claim 1 , further comprising two sensor sub-assemblies arranged on either side of the actuator sub-assembly.

10 . The magnetic bearing according to claim 1 , wherein at least one magnetic system amidst the actuator bobbins and the sensor bobbins comprises together:
a coil holder; a coil wound up around the coil holder; and a connector device integrated to the coil holder and designed for plugging at least one wire.

11 . The magnetic bearing according to claim 10 , wherein the coil holder supports a single coil.

12 . The magnetic bearing according to claim 10 , the coil holder further comprising two lateral portions, each supporting one coil.

13 . The magnetic bearing according to claim 10 , wherein the connector device is an insulator displacement connector designed for receiving and automatically restraining at least one.

14 . The magnetic bearing according to claim 1 , wherein the magnetic bearing is integrated into a rotary apparatus.

15 . The magnetic bearing according to claim 14 , wherein the rotary apparatus is one of:
a flywheel, a turbo molecular pump, a turbo expander, a turbo compressor, an air blower, a spindle or a chiller.

16 . A method for manufacturing a magnetic bearing, the magnetic bearing comprising:
an actuator sub-assembly provided with a magnetic base and at least three actuator bobbins mounted on the magnetic base; and a sensor sub-assembly provided with at least three magnetic sensors associated with the actuator bobbins, wherein at least one sub-assembly amidst the actuator sub-assembly and the sensor sub-assembly comprises at least three sectors mounted together, wherein each sector includes one of:
at least one actuator bobbin when the sector belongs to the actuator sub-assembly, or
at least one magnetic sensor when the sector belongs to the sensor sub-assembly,
the method comprising steps of:
a) manufacturing the actuator sub-assembly;
b) manufacturing the sensor sub-assembly; and
c) assembling the actuator sub-assembly and the sensor sub-assembly to form the magnetic bearing;
wherein at least one of during step a) and during step b), at least three sectors are provided to form the actuator sub-assembly or the sensor sub-assembly, each sector including one of:
at least one magnetic actuator bobbin when the sector belongs to the actuator sub-assembly, or
at least one magnetic sensor bobbin when the sector belongs to the sensor sub-assembly.

Assignees

• Baucé Yvon
• Bienaime Francis
• Carrasco Eduardo
• Skf Magnetic Mechatronics

Inventors

• Baucé Yvon
• Bienaime Francis
• Carrasco Eduardo

Classifications

• F16C32/0461

  of stationary parts of the magnetic circuit · CPC title

• H01F5/02

  wound on non-magnetic supports, e.g. formers · CPC title

• F16C32/0446

  Determination of the actual position of the moving member, e.g. details of sensors · CPC title

• H01F7/06

  Electromagnets; Actuators including electromagnets {(electric coils H01F5/00; devices for holding workpieces using electric force B23Q3/15; load-engaging elements for lifting articles electromagnetically B66C1/06; electromagnetic couplings F16D27/00; magnetic brakes F16D63/002; electromagnetically operated valves F16K11/24, F16K31/00; analysing materials by magnetic means G01N27/72, G01N27/80; electromagnets for winding mechanical clocks G04C1/02; electromagnetic relays H01H51/00; windings for salient poles of dynamo-electric machines H02K3/18; electromagnets for telegraphic communication H04L; for arc lamps H05B31/28)} · CPC title

• F16C32/047

  Details of housings; Mounting of active magnetic bearings · CPC title