EP2115309A2 - Dispositif de palier magnétique - Google Patents

Dispositif de palier magnétique

Info

Publication number
EP2115309A2
EP2115309A2 EP07845302A EP07845302A EP2115309A2 EP 2115309 A2 EP2115309 A2 EP 2115309A2 EP 07845302 A EP07845302 A EP 07845302A EP 07845302 A EP07845302 A EP 07845302A EP 2115309 A2 EP2115309 A2 EP 2115309A2
Authority
EP
European Patent Office
Prior art keywords
magnetic bearing
bearing device
control
axial
control winding
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.)
Withdrawn
Application number
EP07845302A
Other languages
German (de)
English (en)
Inventor
Manfred Schrödl
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.)
Individual
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 EP2115309A2 publication Critical patent/EP2115309A2/fr
Withdrawn legal-status Critical Current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
    • F16C32/0446—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
    • F16C32/0459—Details of the magnetic circuit
    • F16C32/0461—Details of the magnetic circuit of stationary parts of the magnetic circuit
    • F16C32/0465—Details of the magnetic circuit of stationary parts of the magnetic circuit with permanent magnets provided in the magnetic circuit of 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
    • F16C32/047—Details of housings; Mounting of active 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
    • F16C32/048—Active magnetic bearings for rotary movement with active support of two degrees of freedom, e.g. radial magnetic bearings
    • F16C32/0482—Active magnetic bearings for rotary movement with active support of two degrees of freedom, e.g. radial magnetic bearings with three electromagnets to control the two degrees of freedom
    • 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
    • F16C32/0485—Active magnetic bearings for rotary movement with active support of three degrees of freedom

Definitions

  • the invention relates to a magnetic bearing device for non-contact mounting of a movable body, such as a shaft, with a stationary bearing part, with a permanent magnet system having at least one permanent magnet for generating a magnetic flux base, and with a movable body, such as a shaft, with a stationary bearing part, with a permanent magnet system having at least one permanent magnet for generating a magnetic flux base, and with a movable body, such as a shaft, with a stationary bearing part, with a permanent magnet system having at least one permanent magnet for generating a magnetic flux base, and with a
  • control winding system having at least one control winding for t producing a control flux that a dependent deviations of the body from the desired position control current is supplied during operation.
  • Magnetic bearing devices use the effect that occur in the air gap between a moving body and a stationary (stator) bearing part by magnetic flux density forces that increase quadratically with the flux density. These magnetic fluxes are caused by electrical currents in coils or by permanent magnets. Embodiments with permanent magnets have the advantage that they can be operated with significantly less electrical energy, since the permanent magnet excitation generates a basic flux density distribution in the air gap and an additional electrical winding system takes over a position control only the stabilization of the position coordinates to be controlled.
  • WO 01/48389 A such a magnetic bearing device is described, which has a stator structure in which every second stator tooth includes a permanent magnet and the remaining teeth are provided with control windings.
  • a disadvantage of this arrangement is that the sign of the flux density in the air gap changes after each tooth, whereby in the magnetic return part in the movable body (a wave) an alternating magnetic field occurs, which has high iron losses.
  • sensors for position detection are provided in the magnetic bearing devices described above, which additionally increase the storage and the. minimize mechanical ruggedness.
  • the object of the invention is to avoid the disadvantages mentioned and to provide a magnetic bearing device, which does not require mechanical sensors, and which can be carried out very low loss at the same time compact dimensions.
  • a simple mechanical arrangement in combination with a sensorless position detection is desired.
  • the invention provides a magnetic bearing device with the features of the independent claim.
  • Advantageous embodiments and further developments are specified in the dependent claims.
  • the present magnetic bearing device with permanent magnetic bias and sensorless position control is advantageously for non-contact storage of moving bodies, in particular waves, in particular instabilities in the radial coordinates are compensated and so the radial position of the body or the shaft is stabilized.
  • the axial coordinate is either stable and not controlled, but it is also conceivable that this axial coordinate, whether stable or unstable, can also be controlled.
  • the rest flow which passes over an air gap into the movable body (rotor, shaft), is passed through at least one (circular) annular permanent magnet generated; Furthermore, it is preferred that no sign change occurs along the air gap circumference, whereby the formation of iron losses is strongly suppressed.
  • the magnetic flux can be passed from the magnet system via teeth to the air gap, the teeth carry control windings of the control winding system. These control windings generate a control flux which is used to stabilize in particular the radial coordinates.
  • the magnetic circuit of the control flux is preferably designed so that it practically does not pass through the permanent magnets, whereby a low magnetic resistance along the path of the control flux is present and therefore at a given control current, a high control flux is generated, which corresponds to a comparatively high winding inductance.
  • the magnetic path of the control flow can be designed so that the winding inductances change noticeably upon displacement of the body from the desired position (eg rotational axis), which can be achieved by a suitable geometry of the tooth arrangement. For example, this can be provided an arrangement of three teeth offset by 120 ° to each other.
  • the magnetically conductive material is preferably laminated or sintered in the region of the control flux, generally eddy current suppressing or with low electrical conductance.
  • the basic flow exits the permanent magnet system passes through a first return part to the first return air gap, enters the body or shaft via this air gap, runs essentially axially through the body or the shaft up to a second return part, traverses the second one Return air gap and closes back on the second return part.
  • transition from the return part in the body or in the shaft - A - can also be designed so that a passive axial restoring force is generated, so that the bearing is passively stabilized in the axial direction. This can be achieved by increasing the magnetic energy stored in the region of the air gap in an axial deviation from the axial nominal position in both directions.
  • the free space between the backs and the teeth is used to accommodate electronic components.
  • the electronic control including the power part can be accommodated in otherwise unused room areas within the magnetic warehousing, and the space is used to advantage.
  • the space is used to advantage.
  • the EMC radiation through otherwise external cables - between control winding and power electronics is prevented without additional, costly measures, such as shielding.
  • the return material is used as a housing part and / or as a heat sink. This achieves a multiple function of the inference as a magnetic, geometrical, electromagnetic shielding and thermal component.
  • two control winding systems subjected to the same flow can be arranged on the left and right return parts. According to the flow rate then penetrates no axially acting control flux in the magnetic circuit of the radially acting control flux.
  • the return air gaps are expediently to be designed geometrically such that the largest possible axially acting force component occurs upon application is generated with control flow. This is achieved by a flux passing over the air gap with a high axial component.
  • one of the air gaps of the return system is executed completely perpendicular, whereby a completely axial transfer of the axial control flow and the basic flow occurs.
  • the other air gap of the return system is preferably carried out obliquely or horizontally (paraxial), whereby the two magnetic paths are changed differently over the two air gaps at an axial deflection of the body and thereby changes the inductance with the deflection.
  • the axial force can be compensated in total and transferred the overall arrangement in an unstable equilibrium point (set).
  • a simple arrangement can be provided to the effect that, in the case of non-contact mounting of a shaft, a magnetic bearing with an axial control winding system and a magnetic bearing without an axial control winding system are provided.
  • both the radial control flow and the axial control flow are guided on magnetic paths which do not lead via the permanent magnet system.
  • the permanent magnet system is designed as a radially magnetized ring, which is arranged in the radial connection to the radial control flow system.
  • the radial control flow system is executed within it with a good magnetically conductive connection between the windings, the axial control flow system is outside of the magnet made entirely of magnetically good conducting material.
  • control windings of the control winding system can be interconnected in a star connection or in a delta connection, but they can of course also be controlled separately. - S -
  • the measuring means comprise current measuring means with at least one current measuring element;
  • the current measuring element can e.g. be provided in a power supply circuit for power switches, which are associated with the control winding system, or it can be several current measuring elements in the individual phases to or from. the circuit breakers are provided.
  • FIG. 3 shows an axial section of a third embodiment of the magnetic bearing device according to the invention.
  • FIG. 3A in a similar sectional view of Figure 3 shows an arrangement with a shaft which is mounted without contact in two magnetic bearings ..;
  • FIG. 4 shows in a diagram a voltage-space pointer, for the purpose of illustrating three different measuring directions for the position regulation in the case of the magnetic bearing device according to the invention
  • FIG. 5 shows a block diagram of power supply and measuring means with a power supply DC link, with a DC link current and voltage measurement, for a magnetic bearing device
  • Fig. 6 shows a cross section through a magnetic bearing device according to the invention, wherein schematically the use of free spaces between the electromagnetic components or return parts of the magnetic bearing device for electronic components is illustrated schematically.
  • Fig. 1 (Fig. IA and IB) is a magnetic bearing device 1 with a stationary bearing part 2 (hereinafter referred to as stator 2) and a movable body 3 in the form of a rotating shaft (hereinafter referred to as shaft 3) illustrated.
  • the stator 2 has an annular permanent magnet 4, which are associated with the conclusion of the ground flux generated by the permanent magnet 4 return parts 5, 6.
  • FIG. 1B basic flux field lines are illustrated at 7 and 8, respectively.
  • the return parts 5, 6 may be formed by circular disks which, in the region of interfaces illustrated by dashed lines 9, adjoin an outer circular ring 10 which carries the permanent magnet 4 on its inner side.
  • the permanent magnet system 11 thus formed with the permanent magnet 4, which is radially magnetized, thus generates a base flux 7, 8 which, starting from the permanent magnet 4, extends, for example, toward the shaft 3, on which a ferromagnetically conductive ring 12 is applied in the region of the stator 2, through which the basic flow 7, 8 extends in the axial direction to the two outer return parts 5, 6 and through them and through the outer annulus 10 back to the permanent magnet 4.
  • the magnetic bearing device 1 furthermore has a control winding system 13 with control windings 14, 15 and 16 on radial teeth 17, 18, 19. These radial teeth 17, 18, 19 are each offset by 120 ° to each other, radially disposed within the permanent magnet 4, and they each carry one of the control windings 14, 15 and 16.
  • Fig. IA are further with dashed lines control flux field lines 20th indicated as they are each caused by two adjacent control windings 14-15, 15-16, 16-14, said control flow field lines 20 also extend through the ring 12 on the shaft 3 in the inner region. In case of deviations of the shaft 3 from the exact center position shown, a return of the shaft 3 can be achieved in this center position by means of the control flow 20, as will be explained in more detail below.
  • FIGS. 2A and 2B one of the magnetic bearing device 1 according to FIGS. 1A and 1B is substantially the same magnetic bearing device 1
  • a permanent magnet system 11 with two axially magnetized ring-shaped permanent magnets 4A and 4B is shown.
  • FIG. 2B again shows a similar course of the basic flow field lines 7 and 8 as shown in FIG. 1B, wherein this basic flow 7, 8 in turn extends in the axial direction through the ring 12 on the shaft 3.
  • This ring 12 has in the embodiment of FIG. 2B in the region between the air gaps 21, where the basic flow from the stator 2 to the ring 12 and back passes, recesses 22 so as to concentrate the field lines 7 and 8 in the air gaps 21 and thereby achieving a good passive axial stabilization of the position of the shaft 3 relative to the stator 2.
  • control winding system 13 is in turn formed with windings 14, 15, 16 and teeth 17, 18, 19; In FIG. 2A, in turn, control flux field lines 20 are shown by dashed lines.
  • FIG. 3 symbolically illustrates an axial control flow field line 25, this axial control flow 25 being generated by the further control winding system 23 for axial stabilization.
  • the control windings 24A, 24B for the axial stabilization are connected in series.
  • the axial control flow 25 generates axial forces, wherein the axial component for the stabilization can be regulated with a separate control current.
  • the axially acting control flow 25, which is the radially acting Control flux 20 (in Fig. IA and 2A) realise beein.usst, as mentioned by the two preferably series-connected control windings 24 and 24A, 24B, one on a return part 5 and 6, respectively provided, wherein a same flooding is given, so that in the sequence no axially acting control flux penetrates into the magnetic circuit of the radially acting control flow 20.
  • the inference air gaps 2IA, 21B differ from those according to FIG. 1B or 2B, as can be seen directly from the representation of FIG. Specifically, as shown in FIG . Fig. 3 left chamfered part 5 inside chamfered, similar to the ring 12 at this point, whereby an oblique air gap 2IA of the return system is obtained, in contrast to the radial air gap 21B between the right end side of the ring 12 and the inside of the remind gleichs 6th be changed in an axial deflection of the shaft 3, the magnetic paths over the two air gaps 2IA, 21B differently, whereby the inductance changes with the deflection accordingly.
  • an indirect position detection in the axial direction can be performed by current measurement.
  • a horizontal, i. axially parallel extending air gap 21a are provided, as can be seen for example in FIG. 3A.
  • Shown in this FIG. 3A is a shaft 3 with two magnetic bearings 1 with mirror-image geometry, wherein the magnetic bearing shown in FIG. 3A essentially corresponds to the magnetic bearing shown in FIG. 3, except that instead of the oblique air gap 21A an axially parallel air gap 21a is provided.
  • Such axially parallel air gaps 21a are particularly easy to manufacture and particularly effective in operation.
  • FIG. 3A it can further be seen from FIG. 3A that in the case of two magnetic bearings, as required for the mounting of a shaft 3, it is expedient to provide a mirror-symmetrical geometry, it being sufficient, only once, ie with only one nem magnetic bearing 1, eg in .Fig. 3A in the right magnetic bearing 1, to provide control windings 24A, 24B for the axial position control; In the second, for example, in the left in Fig. 3A, magnetic bearing 1 could account for such a control winding, although it is of course possible to provide there also control windings as the control windings 24A, 24B.
  • the magnetic path of the control flux 20 or 25 is designed so that the winding inductances upon displacement of the body 3 (the shaft or the rotor 3) from the desired position, for example in the radial direction or in the axial direction, noticeably change what is ensured by the illustrated geometry of the tooth arrangement or the air gap arrangement.
  • the arrangement shown in FIGS. 1A and 2A with three teeth 17, 18, 19 staggered by 120 ° is of particular advantage.
  • the tooth axis of the first tooth 17 is in the x-direction
  • the tooth axis of the second tooth 18 is rotated by 120 ° with respect to the x-direction
  • the tooth axis of the third tooth 19 by 240 ° with respect to the x Direction is twisted.
  • the winding 14 of the first tooth 17 carries a control current and thus produces a control flux 20.
  • the control flow 20 from the first tooth 17 enters the air gap with the width ⁇ perpendicularly, traverses it, enters the rotor 3 vertically, distributes itself and exits via the air gap vertically and into the second and third tooth 18 or 19 one.
  • control flux 20 closes almost without further magnetic resistance back to the first tooth 17.
  • the inductance of this arrangement is obtained as a quotient of control flux linkage of the current-wound winding to the current through the winding. It decreases with increasing air gap ⁇ and can be determined by the known flow rate.
  • f (dx) is a monotonic function in dx
  • ⁇ (dx) represents the flux linkage of the winding 14 dependent on dx at a fixed current through the winding 14.
  • the function describes a circle with radius ⁇ y and offset y 0 .
  • the radius ⁇ y is related to the eccentricity dr via a monotonic function and degenerates to zero when the magnetic bearing, ie the shaft 3, is exactly centered.
  • the current change space pointer JLS can be mentally formed by two sub-hands.
  • the first sub-pointer is determined by the mean inverse inductance and always points in the direction of the applied test voltage space vector.
  • the second sub-pointer is determined by the current bearing eccentricity.
  • the deflection vector direction information ⁇ jY of the second sub-pointer determines the direction, and the deflection vector magnitude information ⁇ y determines the intensity of deflection of the bearing from the center position.
  • FIG. 4 shows the voltage space vector which can be realized with a three-phase inverter and is designated according to the following table 1: Table 1:
  • ⁇ i SBa ⁇ -Iu ⁇ Iy 0 + ⁇ ycos ⁇ y-2 ⁇ / 3)]
  • the parameter y 0 can be eliminated (or even calculated) and the sought state variables ⁇ y and Y can be calculated.
  • the sought state variables ⁇ y and Y can be calculated.
  • FIG. 5 illustrates a magnetic bearing device 1 with an associated converter 30 for the control windings 14, 15, 16 of the control winding system 13, which are not shown in greater detail in FIG. 5, for example in star connection (but possibly also in delta connection or individually).
  • Fig. 1 and 2 This magnetic bearing device 1 and the associated inverter 30 is associated with a DC link 32, via which the voltage or power supply of the control windings from a power supply part 33 ago ..
  • the power supply part 33 for example, a three-phase AC voltage is supplied, which in an unspecified inverter part is rectified so as to produce a DC link DC current i and a DC link voltage U.
  • a resistor 34 is provided, wherein only very schematically within the processor system 31 illustrated measuring means 35 cooperate with this current measuring resistor 34, and the ⁇ current as already described in detail above.
  • the voltage U applied to a capacitor 36 can also be tapped, for example, via a voltage divider 37 with resistors 38, 39 and measured with the measuring means 35.
  • a potential-bound voltage measurement is thus preferably present. Such a voltage measurement is not absolutely necessary, but may be appropriate to increase the accuracy.
  • the processor system 31 in the present example further, with potential separation 40, a host computer 41 assigned to execute higher-level control or diagnostic functions. However, the above-explained calculations are performed in the processor system 31.
  • the processor system 31 has a control output 42 to a control and driving unit 43 to control the switches of the converter '30 formed for example by .Halbleiterventile 44 accordingly so as, depending on the deflection of the shaft 3 from the target position the control windings (eg, 14, 15 , 16) after carrying out the measurement, supply the appropriate control current as described.
  • the current rise measurement can be combined by the combination of at least two current rise measurements I, II, whereby the accuracy of the eccentricity determination at a noticeable ohms resistance or increased in a fluctuating flux linkage, such as by oscillations of the shaft 3.
  • the current rise measurement is performed in times in which no switching operation of the feeding converter 30 is performed. This prevents electromagnetic interference of the measurement.
  • the current measurement is preferably carried out on the basis of current measuring elements 34 which are arranged in the region of the intermediate circuit 32 between the intermediate circuit capacitor 36 and the circuit breakers 44.
  • a potential connection of the data processing unit 31 (processor, ASIC, etc.) to the current measurement is possible, and this leads to a cost-effective and compact realization of the current measurement.
  • the present magnetic bearing device 1 does not require mechanical sensors, and the position control is carried out simply on the basis of inductance evaluations, whereby the effort and, in particular, energy losses are extremely low and moreover a compact design for the magnetic bearing device 1 is made possible.
  • the return parts 5, 6, made of good magnetic conductive material.
  • these return parts 5, 6 can also conduct electrical or thermal well and at the same time electromagnetic Shielding radiation well, and this is utilized in the following, these return parts 5, 6 as housing parts of the magnetic storage device 1, as a heat sink, as electromagnetic.
  • Use shielding and / or as mounting plates for mounting within the magnetic bearing device 1 electronic components see Fig. 5).
  • the return parts 5, 6, for example, form a Faraday cage and a heat sink for free space 60 between the electromagnetic components of the magnetic bearing device 1 mounted electronic components 50-55, as shown schematically in Fig. 6.
  • These electronic components 50-55 in the region between the return parts 5, 6 and the development windings 14, 15, 16 may be, for example, control components and power component components, in particular components of the intermediate circuit 32 and the power switch 44 of the arrangement according to FIG. 5 , act.
  • This favorable use of otherwise unused spaces within the stator 2 additionally favors the achievement of a compact overall system.
  • components such as the components 31, 34, 36, 38, 39, 43, 44 shown in Fig. 5, housed. This makes it possible to perform the entire control and power electronics within the camp and supply only one power supply to the camp.

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

Abstract

L'invention concerne un dispositif de palier magnétique (1) pour le logement sans contact d'un corps mobile (2) tel qu'un arbre, comportant une partie de palier fixe (2), un système d'aimants permanents (11) comprenant au moins un aimant permanent (4, 4A, 4B) destiné à produire un flux de base magnétique (7, 8), et un système d'enroulements de commande (13) comprenant au moins un enroulement de commande (14, 15, 16) destiné à produire un flux de commande (20), pouvant recevoir, en fonctionnement, un courant de commande (i) dépendant d'écarts du corps (3) par rapport à la position de consigne. Le dispositif selon l'invention comporte également des éléments de mesure (36, 37, 38, 39) destinés à mesurer une variation d'inductance du système d'enroulements de commande (13) en cas d'écart du corps (3) par rapport à la position de consigne et/ou une grandeur électrique liée à une tension induite dans le système d'enroulements de commande (13), à partir de laquelle le courant de commande est déduit.
EP07845302A 2006-12-19 2007-12-19 Dispositif de palier magnétique Withdrawn EP2115309A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0209306A AT505479A1 (de) 2006-12-19 2006-12-19 Magnetlagereinrichtung
PCT/AT2007/000575 WO2008074045A2 (fr) 2006-12-19 2007-12-19 Dispositif de palier magnétique

Publications (1)

Publication Number Publication Date
EP2115309A2 true EP2115309A2 (fr) 2009-11-11

Family

ID=39432687

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07845302A Withdrawn EP2115309A2 (fr) 2006-12-19 2007-12-19 Dispositif de palier magnétique

Country Status (3)

Country Link
EP (1) EP2115309A2 (fr)
AT (1) AT505479A1 (fr)
WO (1) WO2008074045A2 (fr)

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CN103939466B (zh) * 2014-04-18 2016-06-15 江苏大学 一种三自由度磁轴承
CN106979225B (zh) * 2017-04-11 2018-12-18 南京邮电大学 一种锥形轴向磁轴承
CN108374840B (zh) * 2018-03-30 2023-08-25 浙江师范大学 一种基于磁流变效应的滑动轴承制动装置及控制方法
CN113187815B (zh) * 2021-07-05 2021-09-10 山东天瑞重工有限公司 一种径向解耦混合磁轴承

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