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1.
公开(公告)号:US20240297603A1
公开(公告)日:2024-09-05
申请号:US18585346
申请日:2024-02-23
CPC分类号: H02P27/045 , H02P6/18 , H02K7/09
摘要: A device for detecting a change in the direction of rotation of a rotor for a magnetic bearing. The device includes a determining means (102) and a comparing means (103). The determining means (102) determines a spacing between the axis of rotation of the rotor and the centre of gravity of the rotor. The comparing means (103) compares the spacing between the axis of rotation of the rotor and the centre of gravity of the rotor with a predefined threshold (Se) when the absolute value of the speed of rotation of the rotor is greater than a predefined imbalance detection speed threshold (SB). The comparing means (103) also detects the change in the direction of rotation of the rotor from the result of the comparison.
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2.
公开(公告)号:US20240139908A1
公开(公告)日:2024-05-02
申请号:US18487463
申请日:2023-10-16
发明人: Francis BIENAIME , Yannick Paul , Sylvain Palmeri , Gerald AUBÉ
CPC分类号: B24B51/00 , B24B41/044 , F16C32/0451
摘要: A device (21) for controlling a spindle of a grinding machine (1) is disclosed. The spindle includes a rotor (5) supported by two radial magnetic bearings, one axial bearing, and a grinding wheel (6). The device includes a storage means (22) for storing control coefficients of the magnetic bearings. The device includes a means for determining a type of the grinding wheel and a type of the rolling bearing ring. A selection means (23) selects control coefficients associated with the determined types of grinding wheel and of rolling bearing ring from among the control coefficients stored in the storage means. The device also includes a means (23) for controlling the radial and axial magnetic bearings. Said means controlling the radial and axial (12) magnetic bearings on the basis of the control coefficients of the determined types of grinding wheel and of rolling bearing ring.
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公开(公告)号:US11728696B2
公开(公告)日:2023-08-15
申请号:US17121148
申请日:2020-12-14
发明人: Erwan Salahun , Joaquim Da Silva , Bruno Tellier
摘要: A lamination stack for use in a rotating electrical machine includes a plurality of sheets of ferritic material. Each of the sheets has first and second sides that include asperities, and the asperities have a height of about two microns and a width of about two microns. A layer of electrically insulating material is provided between adjacent pairs of the ferritic sheets in the stack, and the asperities extend into the electrically insulating material.
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公开(公告)号:US20210270317A1
公开(公告)日:2021-09-02
申请号:US17171215
申请日:2021-02-09
发明人: Francis Bienaime
摘要: System for controlling at least one active magnetic bearing equipping a rotating machine comprising a rotor and a stator, at least one means for measuring the radial positions of the rotor as a function of the signal from at least one position sensor, and at least two control loops of the active magnetic bearing as a function of the radial positions of the rotor, each control loop of the magnetic bearing being provided with at least one synchronous filter as a function of the rotation speed, and an extended Kalman filter for determining the rotation speed of the rotor with respect to the stator receiving as input, from position sensors, measurements of radial position of the rotor and as a function of measurements of radial position of the rotor performed over a predetermined time at zero rotor rotation speed.
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公开(公告)号:US20210099032A1
公开(公告)日:2021-04-01
申请号:US17121148
申请日:2020-12-14
发明人: Erwan Salahun , Joaquim Da Silva , Bruno Tellier
摘要: A lamination stack for use in a rotating electrical machine includes a plurality of sheets of ferritic material. Each of the sheets has first and second sides that include asperities, and the asperities have a height of about two microns and a width of about two microns. A layer of electrically insulating material is provided between adjacent pairs of the ferritic sheets in the stack, and the asperities extend into the electrically insulating material.
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6.
公开(公告)号:US10859115B2
公开(公告)日:2020-12-08
申请号:US15682950
申请日:2017-08-22
发明人: Jens Anders
IPC分类号: F16C32/04 , F16C35/073 , F16C35/077 , H02K7/09
摘要: A landing bearing assembly for a rotary machine having a stator assembly, a rotor assembly and a magnetic bearing. The landing bearing assembly having a stator landing portion integral with the stator assembly and a rotor landing portion integral with the rotor assembly. A first coating, which is an anti-wear and/or an anti-friction coating, is dispensed on at least one of the stator landing portion and the rotor landing portion. The invention also concerns such a rotary machine.
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公开(公告)号:US20190186537A1
公开(公告)日:2019-06-20
申请号:US16214217
申请日:2018-12-10
发明人: Luc Baudelocque
IPC分类号: F16C32/04
CPC分类号: F16C32/048 , F16C32/0461
摘要: A radial magnetic bearing assembly having an unsymmetrical stator. The assembly comprises fewer or smaller electromagnets, and thus capacity, in the two lower quadrants below the rotor in use, in comparison to the electromagnets, and thus capacity, in the two upper quadrants above the rotor in use. This creates space in the two lower quadrants that can advantageously be used to move for example instrumentation and cooling from other places of the assembly to make the bearing assembly compacter, and also to be able to put instrumentation and cooling where it is best needed, close to the rotor.
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8.
公开(公告)号:US20180128315A1
公开(公告)日:2018-05-10
申请号:US15682950
申请日:2017-08-22
发明人: Jens Anders
IPC分类号: F16C32/04
CPC分类号: F16C32/0474 , F16C32/0442 , F16C35/073 , F16C35/077 , F16C2206/00 , F16C2380/26 , H02K7/09
摘要: A landing bearing assembly for a rotary machine having a stator assembly, a rotor assembly and a magnetic bearing. The landing bearing assembly having a stator landing portion integral with the stator assembly and a rotor landing portion integral with the rotor assembly. A first coating, which is an anti-wear and/or an anti-friction coating, is dispensed on at least one of the stator landing portion and the rotor landing portion. The invention also concerns such a rotary machine.
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9.
公开(公告)号:US20170167894A1
公开(公告)日:2017-06-15
申请号:US15349215
申请日:2016-11-11
发明人: Ulrich Schroeder , Eduardo Carrasco
CPC分类号: G01D5/20 , F16C32/0406 , F16C41/007 , G01B7/003 , H02K7/09 , H02K11/225
摘要: A device for detecting the axial position of a rotor shaft of a rotary machine having a stator and a rotor is provided. The detecting device includes a sensor stator ring, secured to the stator, made from ferromagnetic material, facing the shoulder of one end of the hollow or not hollow rotor shaft and arranged so as to leave an axial airgap with the one end of the rotor shaft. The sensor stator ring having at least one annular slot receiving an annular induction coil. The rotor shaft is made from solid magnetic steel, an outer end of the rotor shaft acts as a target surface whose axial position is to be measured by the sensor stator ring.
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10.
公开(公告)号:US20240295578A1
公开(公告)日:2024-09-05
申请号:US18585189
申请日:2024-02-23
CPC分类号: G01P13/045 , F16C32/0474
摘要: A device (17) for detecting the direction of rotation of a rotor for a magnetic bearing includes comparing means (100), first determining means (105), and second determining means (107). The comparing means (100) compares the speed of rotation of the rotor with a predefined speed threshold (Se). The first determining means (105) determines the speed of rotation gradient of the rotor. The second determining means (107) determines the direction of rotation of the rotor from the result of the comparison of the speed of rotation of the rotor with the predefined speed threshold (Se) and the value of the determined parameter representative of the kinetics of the rotor.
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