GB1458687A - Control circuit for lateral guidance for example a centrifuge rotor - Google Patents

Control circuit for lateral guidance for example a centrifuge rotor

Info

Publication number
GB1458687A
GB1458687A GB4236474A GB4236474A GB1458687A GB 1458687 A GB1458687 A GB 1458687A GB 4236474 A GB4236474 A GB 4236474A GB 4236474 A GB4236474 A GB 4236474A GB 1458687 A GB1458687 A GB 1458687A
Authority
GB
United Kingdom
Prior art keywords
signals
section
damping
rotor
vibrations
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
GB4236474A
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.)
Rnier D GmbH
Original Assignee
Rnier D 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
Application filed by Rnier D GmbH filed Critical Rnier D GmbH
Priority to GB4236474A priority Critical patent/GB1458687A/en
Publication of GB1458687A publication Critical patent/GB1458687A/en
Expired 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
    • F16C32/0453—Details of controllers, i.e. the units determining the power to be supplied, e.g. comparing elements, feedback arrangements with P.I.D. control for controlling two axes, i.e. combined control of x-axis and y-axis
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D3/00—Control of position or direction
    • G05D3/12—Control of position or direction using feedback

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Electromagnetism (AREA)
  • Mechanical Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Magnetic Bearings And Hydrostatic Bearings (AREA)
  • Centrifugal Separators (AREA)

Abstract

1458687 Automatic control of position DORNIER GmbH 30 Sept 1974 42364/74 Heading G3R [Also in Division H3] A vertical axis (centrifuge) rotor is kept in position by a PD controller in response to phase displaced signals from two horizontal deviation sensors. The signals are analogue voltages applied to terminals al, bl of the circuit shown, whose output at a4, b4 energizes correspondingly placed electromagnets. The circuits are designed to provide damping of "circular" vibrations which occur both in the direction of rotation and in the opposite direction, and to filter out components in the sensor signals caused by the rotational axis not being truly coincident with the geometric axis. The latter is achieved in Section F, termed a "circular filter". 4a, 4b are operational amplifiers which receive the respective signals through resistors R1a, R1b and also cross-coupled signals via capacitors C1a, C1b whose reactance (when the rotor is at rated speed) equals the corresponding resistance. U1 is an inverter. The section KO is to improve the damping of vibrations in the direction of rotation; it features low-pass filters R3, C3, R4 for the direct signals and high pass filters C4, R6 for the crosscoupled signals. The section Kr is to improve damping in the opposite direction and also provides the PD characteristic. The input resistors R10 for the cross-coupled signals are a multiple of those, R9, for the direct signals.
GB4236474A 1974-09-30 1974-09-30 Control circuit for lateral guidance for example a centrifuge rotor Expired GB1458687A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4236474A GB1458687A (en) 1974-09-30 1974-09-30 Control circuit for lateral guidance for example a centrifuge rotor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4236474A GB1458687A (en) 1974-09-30 1974-09-30 Control circuit for lateral guidance for example a centrifuge rotor

Publications (1)

Publication Number Publication Date
GB1458687A true GB1458687A (en) 1976-12-15

Family

ID=10424091

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4236474A Expired GB1458687A (en) 1974-09-30 1974-09-30 Control circuit for lateral guidance for example a centrifuge rotor

Country Status (1)

Country Link
GB (1) GB1458687A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1984000198A1 (en) * 1982-07-03 1984-01-19 Deutsche Forsch Luft Raumfahrt Magnetic bearing for a rotor
GB2129582A (en) * 1982-11-11 1984-05-16 Seiko Instr & Electronics Controlled magnetic bearing device
EP0281632A1 (en) * 1986-09-12 1988-09-14 Hitachi, Ltd. Electromagnetic bearing controller
US4885491A (en) * 1987-10-28 1989-12-05 National Aerospace Laboratory Unstable vibration prevention apparatus for magnetic bearing system

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1984000198A1 (en) * 1982-07-03 1984-01-19 Deutsche Forsch Luft Raumfahrt Magnetic bearing for a rotor
JPS59500979A (en) * 1982-07-03 1984-05-31 ドイツチエ　フオルシユングス−ウント　フエルズ−フスアンシユタルト　フユ−ル　ルフト　ウント　ラウムフア−ルト　エ−　フアウ Magnetic bearing device for rotor
GB2129582A (en) * 1982-11-11 1984-05-16 Seiko Instr & Electronics Controlled magnetic bearing device
DE3340909A1 (en) * 1982-11-11 1984-05-17 Seiko Instruments & Electronics Ltd., Tokyo CONTROL DEVICE FOR A MAGNETIC BEARING
FR2536138A1 (en) * 1982-11-11 1984-05-18 Seiko Instr & Electronics MAGNETIC BEARING DEVICE OF THE CONTROL TYPE
EP0281632A1 (en) * 1986-09-12 1988-09-14 Hitachi, Ltd. Electromagnetic bearing controller
EP0281632A4 (en) * 1986-09-12 1989-01-18 Hitachi Ltd Electromagnetic bearing controller.
US4885491A (en) * 1987-10-28 1989-12-05 National Aerospace Laboratory Unstable vibration prevention apparatus for magnetic bearing system

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Legal Events

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