CA2161565A1 - High efficiency drive circuit for an active magnetic bearing system - Google Patents

High efficiency drive circuit for an active magnetic bearing system

Info

Publication number
CA2161565A1
CA2161565A1 CA002161565A CA2161565A CA2161565A1 CA 2161565 A1 CA2161565 A1 CA 2161565A1 CA 002161565 A CA002161565 A CA 002161565A CA 2161565 A CA2161565 A CA 2161565A CA 2161565 A1 CA2161565 A1 CA 2161565A1
Authority
CA
Canada
Prior art keywords
coil
shaft
pair
coils
current
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.)
Granted
Application number
CA002161565A
Other languages
French (fr)
Other versions
CA2161565C (en
Inventor
Lance F. Miller
Kenneth J. Eakman
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.)
GE Aviation Systems LLC
Original Assignee
Individual
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
Application filed by Individual filed Critical Individual
Publication of CA2161565A1 publication Critical patent/CA2161565A1/en
Application granted granted Critical
Publication of CA2161565C publication Critical patent/CA2161565C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • F16C32/0451—Details of controllers, i.e. the units determining the power to be supplied, e.g. comparing elements, feedback arrangements with P.I.D. control
    • F16C32/0455—Details of controllers, i.e. the units determining the power to be supplied, e.g. comparing elements, feedback arrangements with P.I.D. control including digital signal processing [DSP] and analog/digital conversion [A/D, D/A]
    • 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
    • F16C32/0457—Details of the power supply to the electromagnets
    • 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
    • F16C32/0489—Active magnetic bearings for rotary movement with active support of five degrees of freedom, e.g. two radial magnetic bearings combined with an axial bearing

Abstract

A plurality of electromagnetics in an array surround a shaft, with current controlled in the coils of the electromagnets to support the shaft at a desired position approximately centered between the electromagnets. Shaft position sensors provide feedback to a control system for modulating the current to the electromagnet coils, which are arranged in pairs on opposite sides of the shaft. A drive circuit for each coil includes first and second switching transistors which connect the coil to the power.supply to transfer a current pulse to the coil. A pair of circulating diodes begin conducting when the transistors turn off, and return power to the supply. A control circuit for the drive circuits interleaves on and off intervals for the coils in the electromagnet pairs so that one coil of the pair is being switched off at about the same time as the other coil of the pair is being switched on. The result is that the energy being returned to the power supply by the off-turning coil is diverted, at least in part, to the on-turning coil, thereby to reduce net current drain from the power supply.
CA002161565A 1994-10-28 1995-10-27 High efficiency drive circuit for an active magnetic bearing system Expired - Lifetime CA2161565C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/331,306 US5627421A (en) 1994-10-28 1994-10-28 High efficiency drive circuit for an active magnetic bearing system
US08/331,306 1994-10-28

Publications (2)

Publication Number Publication Date
CA2161565A1 true CA2161565A1 (en) 1996-04-29
CA2161565C CA2161565C (en) 2006-08-08

Family

ID=23293411

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002161565A Expired - Lifetime CA2161565C (en) 1994-10-28 1995-10-27 High efficiency drive circuit for an active magnetic bearing system

Country Status (6)

Country Link
US (1) US5627421A (en)
JP (1) JP3791948B2 (en)
CA (1) CA2161565C (en)
DE (1) DE19539976B4 (en)
FR (1) FR2726338B1 (en)
GB (1) GB2294559B (en)

Families Citing this family (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19514801A1 (en) * 1995-04-21 1996-10-24 Wittur Aufzugteile Gmbh & Co Method for controlling and monitoring the operation of an elevator system and roller bearings for use in the method
JP2997632B2 (en) * 1995-04-27 2000-01-11 核燃料サイクル開発機構 Electromagnetic rotary vibration device for rotary body and vibration control device for rotary body using the same
JPH1082420A (en) * 1996-09-09 1998-03-31 Ntn Corp Digital control method and device of magnetic bearing spindle
US5969451A (en) * 1996-12-13 1999-10-19 General Electric Company Current-controlled magnetic thrust compensators for mechanical thrust bearings
CA2202442A1 (en) * 1997-04-11 1998-10-11 Revolve Technologies Inc. Current mode switching for tri-state amplifiers in magnetic bearing control systems
US6348749B1 (en) * 1997-04-14 2002-02-19 Koyo Seiko Co., Ltd. Magnetic bearing device and method of starting the device
JP3735749B2 (en) 1997-07-22 2006-01-18 光洋精工株式会社 Turbo molecular pump
US6112251A (en) * 1998-01-13 2000-08-29 Cabletron Systems, Inc. Virtual local network for sending multicast transmissions to trunk stations
US6215218B1 (en) 1998-04-09 2001-04-10 Koyo Seiko Co., Ltd. Control magnetic bearing
JP2000145774A (en) * 1998-11-17 2000-05-26 Koyo Seiko Co Ltd Control-type magnetic bearing device
EP1063753B1 (en) * 1999-06-22 2009-07-22 Levitronix LLC Electric rotary drive comprising a magnetically suspended rotor
US6608418B2 (en) 2001-08-24 2003-08-19 Smiths Aerospace, Inc. Permanent magnet turbo-generator having magnetic bearings
JP4502667B2 (en) * 2004-03-04 2010-07-14 エドワーズ株式会社 Magnetic bearing device and turbomolecular pump equipped with the magnetic bearing device
KR100616172B1 (en) * 2004-05-10 2006-08-25 주식회사 대우일렉트로닉스 Apparatus for controlling position by using intensity of illumination sensor in plasma display panel
EP1605177A1 (en) * 2004-06-08 2005-12-14 Mecos Traxler AG Magnetic bearing device with simplified wiring
JP4746619B2 (en) * 2005-07-05 2011-08-10 株式会社荏原製作所 Magnetic bearing device and magnetic bearing method
EP1863168B1 (en) * 2006-05-31 2020-02-26 Levitronix LLC Electrical multi-phase machine and method for operating such
JP5369410B2 (en) * 2007-09-05 2013-12-18 セイコーエプソン株式会社 Electric motor drive circuit and device equipped with the same
JP5025505B2 (en) * 2008-01-24 2012-09-12 株式会社荏原製作所 Magnetic bearing device
US8690749B1 (en) 2009-11-02 2014-04-08 Anthony Nunez Wireless compressible heart pump
US8803392B2 (en) * 2010-06-19 2014-08-12 Peter S. Aronstam Axial magnetic suspension
US8941278B2 (en) * 2010-07-19 2015-01-27 Peter S. Aronstam Method and apparatus for hybrid suspension system
CZ304430B6 (en) * 2012-12-05 2014-04-30 Vysoká Škola Báňská-Technická Univerzita Ostrava Levitation-vibrating device for measuring viscosity, density and interfacial tension
JP6144527B2 (en) * 2013-04-16 2017-06-07 エドワーズ株式会社 Magnetic bearing device and vacuum pump equipped with the magnetic bearing device
US10495145B2 (en) * 2016-04-22 2019-12-03 Ingersoll-Rand Company Active magnetic bearing controller
WO2018102048A1 (en) * 2016-11-30 2018-06-07 Dresser-Rand Company Balanced switching amplifier for a magnetic bearing assembly
EP3431789B1 (en) * 2017-07-20 2019-11-20 Mecos AG Stray flux compensation in a magnetic bearing device
US10742179B2 (en) 2018-03-01 2020-08-11 Ingersoll-Rand Industrial U.S., Inc. Power amplifier
US10907607B2 (en) 2019-04-24 2021-02-02 Semiconductor Components Industries, Llc Circuit and method for controlling a coil current during a soft shut down
CN110332234B (en) * 2019-06-06 2020-08-04 清华大学 Control method and application system of magnetic bearing switch power amplifier
EP4080074A1 (en) * 2020-08-21 2022-10-26 SpinDrive Oy Controlling magnetic levitation equipment
CN112145553B (en) * 2020-09-22 2021-08-10 珠海格力电器股份有限公司 Magnetic suspension bearing system, control method and device thereof and storage medium

Family Cites Families (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3937533A (en) * 1974-02-08 1976-02-10 The United States Of America As Represented By The United States National Aeronautics And Space Administration Office Of General Counsel-Code Gp Axially and radially controllable magnetic bearing
FR2480959A1 (en) * 1980-04-18 1981-10-23 Org Europeene De Rech Magnetic suspension system for use in satellites - includes low power consumption control circuit providing correcting current to four positioning coils
IE52454B1 (en) * 1980-12-24 1987-11-11 Nasa Linear magnetic bearings
FR2501314A1 (en) * 1981-03-09 1982-09-10 Europ Propulsion ACTIVE REDUNDANT ELECTROMAGNETIC BEARING
US4417772A (en) * 1981-04-10 1983-11-29 Agence Spatiale Europeenne Method and apparatus for controlling the energization of the electrical coils which control a magnetic bearing
JPS60245443A (en) * 1984-05-18 1985-12-05 Ntn Toyo Bearing Co Ltd Controllable radial magnetic shaft bearing device
US4841184A (en) * 1987-06-23 1989-06-20 Mechanical Technology Incorporated Velocity and imbalance observer control circuit for active magnetic bearing or damper
JPH0198708A (en) * 1987-10-07 1989-04-17 Ebara Res Co Ltd Radial magnetic bearing device
JP3068834B2 (en) * 1988-06-06 2000-07-24 テルデイクス ゲゼルシヤフト ミツト ベシユレンクテル ハフツング Radial and axial bearings for rotors with large radii
GB2221064B (en) * 1988-07-19 1992-04-29 Glacier Metal Co Ltd Improvements in and relating to bearings
US5347190A (en) * 1988-09-09 1994-09-13 University Of Virginia Patent Foundation Magnetic bearing systems
US5355042A (en) * 1988-09-09 1994-10-11 University Of Virginia Patent Foundation Magnetic bearings for pumps, compressors and other rotating machinery
US4920290A (en) * 1988-11-01 1990-04-24 National Aerospace Laboratory Active magnetic bearing apparatus
US5003211A (en) * 1989-09-11 1991-03-26 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Permanent magnet flux-biased magnetic actuator with flux feedback
JPH0720359B2 (en) * 1990-03-16 1995-03-06 株式会社荏原製作所 Unbalance correction device for rotating body
GB2243464B (en) * 1990-03-23 1994-02-23 Toyoda Machine Works Ltd Digital servo-control apparatus
US5053662A (en) * 1990-04-18 1991-10-01 General Electric Company Electromagnetic damping of a shaft
US5036236A (en) * 1990-05-07 1991-07-30 Hughes Aircraft Company Air gap matching proximity sensor for magnetic bearings
JP3090977B2 (en) * 1991-05-31 2000-09-25 株式会社日立製作所 Method and apparatus for controlling magnetic bearing
JPH0510326A (en) * 1991-06-27 1993-01-19 Matsushita Electric Ind Co Ltd Control device for magnetic bearing
US5300841A (en) * 1992-11-02 1994-04-05 General Electric Company Inductive air gap estimation method for active magnetic bearings

Also Published As

Publication number Publication date
US5627421A (en) 1997-05-06
FR2726338B1 (en) 1999-03-05
GB2294559A (en) 1996-05-01
DE19539976A1 (en) 1996-05-02
GB9521279D0 (en) 1995-12-20
JPH08270651A (en) 1996-10-15
CA2161565C (en) 2006-08-08
FR2726338A1 (en) 1996-05-03
JP3791948B2 (en) 2006-06-28
DE19539976B4 (en) 2004-03-04
GB2294559B (en) 1998-06-10

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Legal Events

Date Code Title Description
EEER Examination request
MKEX Expiry

Effective date: 20151027