GB1500809A - Radial active magnetic bearing having a rotating drive - Google Patents

Radial active magnetic bearing having a rotating drive

Info

Publication number
GB1500809A
GB1500809A GB5602/75A GB560275A GB1500809A GB 1500809 A GB1500809 A GB 1500809A GB 5602/75 A GB5602/75 A GB 5602/75A GB 560275 A GB560275 A GB 560275A GB 1500809 A GB1500809 A GB 1500809A
Authority
GB
United Kingdom
Prior art keywords
bearing
rotor
field
phase
windings
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB5602/75A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Licentia Patent Verwaltungs GmbH
Original Assignee
Licentia Patent Verwaltungs GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE19742406790 external-priority patent/DE2406790A1/en
Application filed by Licentia Patent Verwaltungs GmbH filed Critical Licentia Patent Verwaltungs GmbH
Publication of GB1500809A publication Critical patent/GB1500809A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/08—Structural association with bearings
    • H02K7/09—Structural association with bearings with magnetic bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C32/00—Bearings not otherwise provided for
    • F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
    • F16C32/0406—Magnetic bearings
    • F16C32/044—Active magnetic bearings
    • F16C32/0444—Details of devices to control the actuation of the electromagnets
    • F16C32/0446—Determination of the actual position of the moving member, e.g. details of sensors
    • F16C32/0448—Determination of the actual position of the moving member, e.g. details of sensors by using the electromagnet itself as sensor, e.g. sensorless magnetic bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C32/00—Bearings not otherwise provided for
    • F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
    • F16C32/0406—Magnetic bearings
    • F16C32/044—Active magnetic bearings
    • F16C32/0474—Active magnetic bearings for rotary movement
    • F16C32/0493—Active magnetic bearings for rotary movement integrated in an electrodynamic machine, e.g. self-bearing motor
    • F16C32/0497—Active magnetic bearings for rotary movement integrated in an electrodynamic machine, e.g. self-bearing motor generating torque and radial force
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2380/00—Electrical apparatus
    • F16C2380/26—Dynamo-electric machines or combinations therewith, e.g. electro-motors and generators

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Magnetic Bearings And Hydrostatic Bearings (AREA)

Abstract

1500809 Automatic control of position LICENTIA PATENT VERWALTUNGS GmbH 10 Feb 1975 [9 Feb 1974 30 Nov 1974] 5602/75 Heading G3R The rotating field of a (three phase) dynamo electric machine has superimposed upon it a field which functions as a radial active bearing and is adjusted in response to a measurement of the air gap, the two fields having pole pairs differing in number by one. In the embodiments the drive field 1 has two poles per phase and the bearing control field 26 four, but these may be interchanged for starting. As shown, the gap is measured by three differential pairs of sensors, each functioning as a transformer with a movable core (radial movement of the rotor). They have primary windings 2, 3 (for the R phase) energized from drive current transformers ST or the drive current directly and secondaries 4, 5, star connected, with auxiliary secondaries K connected all in series between the star point of the main secondaries and that of a series tuned damping network 30 ... 32, through which the sensors control the bearing field 26. The windings K are to damp unwanted modulation of the restoring force which can give rise to rotor oscillations. The damping circuits are connected through phase adjusting bridge networks 20-22 and amplifiers 23 ... 25 supplying the bearing field 26. In an alternative embodiment, Figs. 3 and 4 (not shown), the two fields are provided by a single set of bifurcated windings, energized from a twelve phase transformer in two and four pole configuration for the drive and bearing fields respectively. Instead of the separate gap sensors shown the (separate) control windings themselves may be used. Figs. 5-7 (not shown), illustrate three such arrangements using feedback amplifiers as "negative resistance elements". The feedback may be non- linear. For elongated rotor machines two bearing arrangements according to the invention are used, but it is explained that for short rotors one bearing only is required, and the rotor pole face can be convex and the stator face convex or saddleshaped. Where the rotor is external and the stator internal, the rotor and stator pole faces may be spherical.
GB5602/75A 1974-02-09 1975-02-10 Radial active magnetic bearing having a rotating drive Expired GB1500809A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19742406790 DE2406790A1 (en) 1974-02-09 1974-02-09 Radially-active magnetic bearing with rotary drive - has air-gap monitors modulating control field superimposed on drive field
DE19742457084 DE2457084A1 (en) 1974-02-09 1974-11-30 RADIAL ACTIVE MAGNETIC BEARING

Publications (1)

Publication Number Publication Date
GB1500809A true GB1500809A (en) 1978-02-15

Family

ID=25766621

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5602/75A Expired GB1500809A (en) 1974-02-09 1975-02-10 Radial active magnetic bearing having a rotating drive

Country Status (3)

Country Link
DE (1) DE2457084A1 (en)
GB (1) GB1500809A (en)
NL (1) NL7501466A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2182464A (en) * 1985-11-04 1987-05-13 Choy Chang Tong Vertical hydro-electric unit with floating rotor
EP0920109A2 (en) * 1997-11-26 1999-06-02 Ebara Corporation Bearingless rotary machine
US5936370A (en) * 1995-04-21 1999-08-10 Ebara Corporation, Nikkiso Co., Ltd. Electromagnectic rotating machine
US9746028B2 (en) 2014-12-16 2017-08-29 General Electric Company Self-sensing active magnetic bearing systems and methods
US9755477B2 (en) 2012-02-24 2017-09-05 Siemens Aktiengesellschaft Magnetic mounting with force compensation
EP3705839A1 (en) * 2019-03-08 2020-09-09 Waukesha Bearings Limited Improved signal conditioning circuit for use with active magnetic bearings
CN113082507A (en) * 2021-05-12 2021-07-09 苏州大学 Apply to artificial heart's magnetic suspension device

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH678090A5 (en) * 1988-11-22 1991-07-31 Mecos Traxler Ag
CA2210762C (en) * 1995-04-03 2008-06-17 Sulzer Electronics Ag Rotary machine with an electromagnetic rotary drive

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2182464A (en) * 1985-11-04 1987-05-13 Choy Chang Tong Vertical hydro-electric unit with floating rotor
US5936370A (en) * 1995-04-21 1999-08-10 Ebara Corporation, Nikkiso Co., Ltd. Electromagnectic rotating machine
EP0920109A2 (en) * 1997-11-26 1999-06-02 Ebara Corporation Bearingless rotary machine
EP0920109A3 (en) * 1997-11-26 2000-12-13 Ebara Corporation Bearingless rotary machine
US9755477B2 (en) 2012-02-24 2017-09-05 Siemens Aktiengesellschaft Magnetic mounting with force compensation
US9746028B2 (en) 2014-12-16 2017-08-29 General Electric Company Self-sensing active magnetic bearing systems and methods
EP3705839A1 (en) * 2019-03-08 2020-09-09 Waukesha Bearings Limited Improved signal conditioning circuit for use with active magnetic bearings
CN111664779A (en) * 2019-03-08 2020-09-15 沃科夏轴承有限公司 Improved signal conditioning circuit for active magnetic bearings
US11428547B2 (en) 2019-03-08 2022-08-30 Waukesha Bearings Ltd. Signal conditioning circuit for use with active magnetic bearings
CN113082507A (en) * 2021-05-12 2021-07-09 苏州大学 Apply to artificial heart's magnetic suspension device
CN113082507B (en) * 2021-05-12 2023-01-13 苏州大学 Apply to artificial heart's magnetic suspension device

Also Published As

Publication number Publication date
DE2457084A1 (en) 1976-06-10
NL7501466A (en) 1975-08-12

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee