WO2001006139A1 - Control type magnetic bearing device and method of judging type of magnetic bearing - Google Patents
Control type magnetic bearing device and method of judging type of magnetic bearing Download PDFInfo
- Publication number
- WO2001006139A1 WO2001006139A1 PCT/JP2000/004781 JP0004781W WO0106139A1 WO 2001006139 A1 WO2001006139 A1 WO 2001006139A1 JP 0004781 W JP0004781 W JP 0004781W WO 0106139 A1 WO0106139 A1 WO 0106139A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- magnetic bearing
- rotating body
- movement
- model
- amount
- Prior art date
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
-
- 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
- F16C32/0442—Active magnetic bearings with devices affected by abnormal, undesired or non-standard conditions such as shock-load, power outage, start-up or touchdown
-
- 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
-
- 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
- F16C2231/00—Running-in; Initial operation
-
- 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
Definitions
- the present invention relates to a control type magnetic bearing device and a method for determining the model of a magnetic bearing.
- the control type magnetic bearing device includes a machine body having a rotating body and a magnetic bearing, and a control device for controlling the machine body.
- a control device for controlling the machine body There are multiple machine models, and the control parameters differ depending on the model. Therefore, conventionally, it was necessary to prepare a corresponding control device for each model of the machine body.
- an object of the present invention is to provide a control-type magnetic bearing device in which a control device can be applied to a plurality of types of machine bodies. It is another object of the present invention to provide a method for determining a model for applying a control device to a plurality of types of machine bodies. Disclosure of the invention
- the present invention relates to a control-type magnetic bearing device that detects the position of a rotating body supported by a magnetic bearing and controls the position thereof, wherein the stationary rotating body is moved in a predetermined direction, and is moved to a movement limit position.
- the moving amount is obtained by moving the stationary rotating body to the movement limit position. Then, based on the fact that the movement amount differs depending on the model, the model is determined, and the control parameters are set. Therefore, a common control device can be applied to multiple types of machine bodies.
- WO 01 06139 PCTAIPO quest 781
- the present invention also provides a control type magnetic bearing device that detects the position of a rotating body supported by a magnetic bearing and controls the position thereof, wherein the stationary rotating body is moved in a plurality of directions, and a movement limit position is provided.
- control type magnetic bearing device configured as described above, an average movement amount of the movement amount when the stationary rotating body is moved to the movement limit position in a plurality of directions is obtained. Then, based on the fact that the average moving distance differs depending on the model, the model is determined, and the control parameters are set. Therefore, a common control device can be applied to multiple types of machine bodies. Also, based on the average travel distance, the reliability of model determination is high.
- the rotating body supported by the magnetic bearing is moved from a stationary position to one side of the first shaft in a radial direction, and a movement amount up to a movement limit position is obtained.
- the rotating body is moved to one side of the second axis in the radial direction, and a movement amount to a movement limit position is obtained.
- the rotating body is moved to the other side of the first axis in the radial direction.
- the amount of movement to the movement limit position is obtained, and then the rotating body is moved to the other side of the second axis in the radial direction, the amount of movement to the movement limit position is obtained, and based on each of the movement amounts
- the average movement amount is calculated, the model of the magnetic bearing is determined based on the average movement amount, and a control parameter is set.
- the average travel distance is determined from the travel distance when the robot is moved to the position, and based on the fact that the average travel distance differs depending on the model, the model is determined and the control parameters are set.
- This control device can be applied to multiple types of machine bodies, and based on the average travel distance, the reliability of model determination is high.
- FIG. 1 is a flowchart of model determination in a control type magnetic bearing device according to an embodiment of the present invention.
- FIG. 2 is a plan view showing a positional relationship between an inner diameter circle of the protective bearing and a rotating body movable within a range inscribed therein.
- FIG. 3 is a diagram showing a state in which the rotating body in FIG. 2 is inscribed on the + Y side of the inner diameter circle.
- FIG. 4 is a diagram showing a state where the rotating body in FIG. 2 is inscribed on the + X side of the inner diameter circle.
- FIG. 5 is a diagram showing a state where the rotating body in FIG. 2 is inscribed on the ⁇ Y side of the inner diameter circle.
- FIG. 6 is a view showing a state in which the rotating body in FIG. 2 is inscribed on the ⁇ X side of the inner diameter circle.
- FIG. 7 is a diagram showing a center position and a moving amount of the rotating body when the rotating body is sequentially moved to the movement limit position.
- FIG. 8 is a diagram showing a center position and a moving amount of the rotating body when the rotating body is sequentially moved to the movement limit position when the initial center position of the rotating body is not at the center of the XY coordinates. It is.
- FIG. 9 is a longitudinal sectional view showing a machine body of the control type magnetic bearing device.
- FIG. 10 is a cross-sectional view of the machine main body.
- FIG. 11 is a block circuit diagram of the control type magnetic bearing device.
- FIG. 12 is a block diagram showing only a portion related to the position control in the radial direction in the configuration of the control type magnetic bearing device.
- FIG. 13 is a block diagram showing only a part related to axial position control in the configuration of the control type magnetic bearing device.
- FIG. 9 is a longitudinal sectional view showing the machine main body 1 of the control type magnetic bearing device according to one embodiment of the present invention
- FIG. 10 is a transverse sectional view thereof.
- the machine body 1 is of a vertical type in which a vertically rotating body 3 rotates inside a cylindrical casing 2.
- the axial direction of the rotating body 3 is defined as a Z direction
- the illustrated directions orthogonal to the Z direction are defined as an X direction and a Y direction.
- the horizontal machine body 1 includes an axial magnetic bearing 4, a radial magnetic bearing 5, an axial displacement sensor 6, a radial displacement sensor 7, a motor 8, and a protective bearing 9 in addition to the casing 2 and the rotating body 3.
- the axial magnetic bearings 4 are vertically arranged with the flange 3 a of the rotating body 3 interposed therebetween, and support the rotating body 3 in a non-contact manner in the axial direction.
- Four radial magnetic bearings 5 are arranged at 90-degree intervals around the rotating body 3 at two locations on the Z axis.
- the radial displacement sensors 7 are arranged at the same position in the circumferential direction as the radial magnetic bearing 5 and in the Z direction in close proximity to each other in pairs.
- the axial displacement sensor 6 is arranged to face the axial end 3 b of the rotating body 3.
- the motor 8 is mounted on the inner wall of the casing 2 and rotates the rotating body 3 at high speed.
- a pair of protective bearings 9 are provided to restrict the movable range of the rotating body 3 in the axial direction and the radial direction, and to support the rotating body 3 when the rotating body 3 cannot be magnetically supported in a non-contact manner. .
- the radial gap and the axial gap between the protective bearing 9 and the rotating body 3 are predetermined values determined by the model of the machine body 1.
- FIG. 11 is a block circuit diagram showing the connection between the machine main body 1 configured as described above and the control device 11 that also forms a control type magnetic bearing device.
- the control device 11 includes a sensor circuit 12, a magnetic bearing drive circuit 13, an inverter 14, a DSP board 15, and a serial communication board 21.
- the DSP board 15 has a DSP 16 as a digital signal processor, a ROM 17 connected to it, a flash memory 18 as a non-volatile storage device, an A / D converter 19 and a D / A converter.
- a vessel 20 is provided.
- a personal computer 22 installed at a location remote from the control device 11 is connected to the serial communication board 21 of the control device 11.
- Output signals from the axial displacement sensor 6 and the radial displacement sensor 7 are input to the DSP 16 via the sensor circuit 12 and the AZD converter 19.
- the DSP 16 receives the axial magnetic force via the DZA converter 20 and the magnetic bearing drive circuit 13.
- the bearing 4 and the radial magnetic bearing 5 are controlled to thereby support the rotating body 3 in a non-contact manner while controlling the position.
- the DSP 16 controls the rotation of the motor 8 via the inverter 14.
- the ROM 17 stores the processing program in the DSP 16 and the like.
- the flash memory 18 includes a plurality of sets of control parameters corresponding to a plurality of types of the machine body 1, a moving span average value S (details described later) corresponding to a plurality of types of the machine body 1, and a bias current Data such as the value Io is stored. Note that these data can also be rewritten from the personal computer 22.
- FIG. 12 is a block diagram showing only a part related to position control in the radial direction in the configuration of the control device 11. It is assumed that the pair of radial displacement sensors 7 shown in the drawing are, for example, arranged to face each other in the X-axis direction with the rotating body 3 interposed therebetween.
- the outputs of these radial displacement sensors 7 are input to the sensor circuit 12, where a process of subtracting one output from the other output is performed.
- the output of the sensor circuit 12 is subjected to AZD conversion and becomes a displacement signal ⁇ . This represents the displacement of the rotating body 3 with respect to the target position in the X-axis direction.
- the DSP 16 outputs two exciting current signals (Io + Ic) and (Io-Ic) based on the displacement signal ⁇ .
- Io is a bias current value
- Ic is a control current value according to the sign and magnitude of ⁇ .
- the excitation current signals (Io + Ic) and (Io-Ic) are each subjected to DZA conversion and then amplified by the amplifier 13a in the magnetic bearing drive circuit 13.
- the amplified signal is supplied to a pair of radial magnetic bearings 5 facing each other on the X axis with the rotating body 3 interposed therebetween.
- the displacement signal ⁇ ⁇ the electromagnetic force is adjusted in a direction to make the displacement zero, and the rotating body 3 is supported at the target position in the X-axis direction.
- FIG. 13 is a block diagram showing only a portion related to position control in the axial direction in the configuration of the control device 11.
- the output of the axial displacement sensor 6 is input to the sensor circuit 12.
- the sensor circuit 12 obtains a displacement of the rotating body 3 with respect to a target position in the Z-axis direction from an output signal of the axial displacement sensor 6. This displacement is subjected to AZD conversion to become a displacement signal ⁇ Z, which is input to the DSP 16.
- the DSP 16 generates two excitation current signals (Io + Ic) and (Io—Ic) based on the displacement signal ⁇ Z. ) Is output.
- Io is a bias current value
- Ic is a control current value according to the sign and magnitude of ⁇ ⁇ .
- the exciting current signals (Io + Ic) and (Io-Ic) are each subjected to DZA conversion, and then amplified by the amplifier 13a in the magnetic bearing drive circuit 13.
- the amplified signal is supplied to axial magnetic bearings 4 arranged above and below the flange 3 a of the rotating body 3. As a result, the electromagnetic force is adjusted in a direction to make the displacement zero according to the displacement signal ⁇ , and the rotating body 3 is supported at the target position in the Z-axis direction.
- the control type magnetic bearing device configured as described above constitutes a unit for performing rotation control and position control of the rotating body 3.
- the control type magnetic bearing device moves the stationary rotating body 3 in a predetermined direction based on the position control function centered on the DSP 16 at the time of starting, and controls the movement amount to the movement limit position. It constitutes means for determining and means for determining the model of the magnetic bearing (machine body 1) based on the amount of movement and setting control parameters.
- this model determination operation will be described in detail.
- the horizontal machine main body 1 is identified by the DSP 16 in accordance with the flowchart shown in FIG. In this example, there are three types of machine body 1, A type, B type and C type. The size of the gap between the rotating body 3 and the protective bearing 9 differs for each of these models.
- step S1 the DSP 16 measures the movement amount up to the movement limit position. Specifically, first, temporary control parameters are read from the flash memory 18 to drive the axial magnetic bearing 4. As a result, the rotating body 3 floats at the temporary target position on the Z axis. In this state, the rotating body 3 can move in the radial direction within the range of the inner diameter circle of the protective bearing 9.
- FIGS. 2 to 6 are plan views showing the positional relationship between the inner diameter circle C of the protective bearing 9 and the rotating body 3 movable within a range inscribed therein.
- the DSP 16 has the radial displacement sensors located in the + Y and -Y directions.
- the DSP 16 supplies a predetermined exciting current only to the radial magnetic bearing 5 in the + Y direction to attract the rotating body 3 in the + Y direction.
- the rotating body 3 is inscribed on the + Y side of the protective bearing 9 (inner diameter circle C) (the state shown in FIG. 3).
- the DSP 16 reads the displacement signal ⁇ 1 based on the output of the radial displacement sensor 7 arranged in the + Y and one Y directions.
- the DSP 16 calculates a difference ( ⁇ 1 ⁇ 0) between the displacement signal ⁇ 1 and the previously stored displacement signal ⁇ 0.
- the DSP 16 calculates the moving amount YL p (in the + Y direction of the rotating body 3 from FIG. 2 to FIG. 3 based on the correspondence between the previously input displacement signal and the actual displacement. The sign is positive) and is stored.
- the DSP 16 supplies a predetermined exciting current only to the radial magnetic bearing 5 in the + X direction to attract the rotating body 3 in the + X direction.
- the rotating body 3 is inscribed on the + X side of the protective bearing 9 (inner diameter circle C) (the state shown in FIG. 4).
- the DSP 16 reads the displacement signal ⁇ 1 based on the output of the radial displacement sensor 7 arranged in the directions of + X and ⁇ X.
- the DSP 16 calculates a difference ( ⁇ 1 ⁇ 0) between the displacement signal ⁇ 1 and the previously stored displacement signal ⁇ 0. Based on this calculation result, the DSP 16 calculates and stores the moving amount XLP (the sign is positive) of the rotating body 3 in the + X direction from FIG. 3 to FIG. 4.
- the DSP 16 supplies a predetermined exciting current only to the radial magnetic bearing 5 in the -Y direction to attract the rotating body 3 in one Y direction.
- the rotating body 3 is inscribed on the —Y side of the protective bearing 9 (inner diameter circle C) (the state shown in FIG. 5).
- the DSP 16 reads the displacement signal ⁇ 2 based on the output of the radial displacement sensor 7 arranged in the + Y and ⁇ Y directions.
- the DSP 16 calculates a difference ( ⁇ 2 ⁇ 0) between the displacement signal ⁇ 2 and the previously stored displacement signal ⁇ 0. Based on the calculation result, the DSP 16 obtains and stores the moving amount YLn (the sign is negative) of the rotating body 3 in the ⁇ Y direction from FIG. 2 to FIG.
- the DSP 16 supplies a predetermined exciting current only to the radial magnetic bearing 5 in the -X direction to attract the rotating body 3 in the 1X direction.
- the rotating body 3 is It is inscribed on one X side of the bearing 9 (inner diameter circle C) (the state in Fig. 6).
- the DSP 16 reads the displacement signal ⁇ 2 based on the outputs of the radial displacement sensors 7 arranged in the + X and 1X directions.
- the DSP 16 calculates a difference ( ⁇ 2 ⁇ 0) between the displacement signal ⁇ 2 and the previously stored displacement signal ⁇ 0. Based on this calculation result, the DSP 16 calculates and stores the movement amount XL n (the sign is negative) of the rotating body 3 in the ⁇ X direction from FIG. 3 to FIG.
- FIG. 7 is a plot of the center positions P0, P1, P2, P3, and P4.
- the movement amounts YLp, XLp, YLn, and XLn described above are the dimensions shown in FIG.
- the initial center position P 0 of the rotating body 3 is not always at the center of P 1 to P 4 as shown in FIG.
- the illustrated YL p and YL n are non-uniform because they are read based on the displacement signal ⁇ 0 at P 0.
- DSP 16 calculates the movement span average value S. Perform (Step S2). Specifically, first, the moving spans Y s and X s in both the Y and X directions are
- the DSP 16 calculates the moving span average value S as
- step S3 It is determined whether or not the condition is satisfied.
- S lmin and S lmax are the radial clearances between the protective bearing 9 and the rotating body 3 in the machine body 1 of model A. The minimum and maximum values. If machine body 1 is model A, the judgment in equation (2) above is YES. Therefore, the DSP 16 proceeds to step S7, reads the control parameters for the model A from the flash memory 18, and supports the axial magnetic bearing 4 and the radial magnetic bearing 5 based on the control parameters. Set a target value for If machine body 1 is not model A, the judgment in equation (2) above is negative. Therefore, DSP 16 proceeds to step S4, and the moving span average value S becomes
- S 2 min and S 2 max are the minimum and maximum values of the clearance in the radial direction between the protective bearing 9 and the rotating body 3 in the machine body 1 of model B (where S l max ⁇ S 2 min). If machine body 1 is model B, the judgment in equation (3) above is YES. Therefore, the DSP 16 proceeds to step S8, reads the control parameters for the model B from the flash memory 18 and supports the axial magnetic bearing 4 and the radial magnetic bearing 5 based on the control parameters. Set the target value.
- step S9 reads the control parameters for the C model from the flash memory 18 and, based on the control parameters, executes control for the axial magnetic bearing 4 and the radial magnetic bearing 5.
- step S6 If the machine body 1 is not a C model, the judgment of the above formula (4) is NO. As a result, the machine body 1 is not any of the A, B, and C models, and the model cannot be identified. Therefore, DSP 16 proceeds to step S6, and displays an error.
- the common control device 11 can automatically set appropriate control parameters for a plurality of types of machine bodies 1 and perform position control of the rotating body 3.
- the control device 11 can be general-purpose, and cost reduction can be achieved by the mass production effect of the control device 11.
- An abnormal display is made only when automatic judgment is not possible, and the control parameters are set by human judgment.
- FIG. 1 shows a process of selecting from three models, it is also possible to make a decision on more models and automatically set the control parameters.
- the model determination is performed based on the movement amounts YLp, XLp, YLn, and XLn, but the model determination may be performed based on the movement amount only in the Y direction or the X direction. .
- the axial magnetic bearing 4 is energized before the movement amounts YLp, XLp, YLn, and XLn are obtained, and a temporary magnetic levitation state is set in the axial direction. If it is possible to suck in the radial direction even in the state of contact with the bearing 9, it is not necessary to float in the axial direction.
- the model determination is performed based on the movement amount up to the radial movement limit, but the model determination may be performed based on the movement amount up to the axial movement limit.
- the stationary rotating body 3 is levitated until its axial end 3b hits the protective bearing 9 to obtain the moving amount from the variation of the displacement signal ⁇ Z of the axial displacement sensor 6.
- the model is determined based on the.
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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)
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10082308T DE10082308B4 (de) | 1999-07-14 | 2000-07-14 | Steuerbare Magnetlagevorrichtung und Verfahren zum Bestimmen eines Maschinentyps eines Magnetlagers |
US09/786,321 US6787955B1 (en) | 1999-07-14 | 2000-07-14 | Controllable magnetic bearing apparatus and method for determining a machine type of a magnetic bearing |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11/200475 | 1999-07-14 | ||
JP20047599A JP3786803B2 (ja) | 1999-07-14 | 1999-07-14 | 制御型磁気軸受装置及び磁気軸受の機種判定方法 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001006139A1 true WO2001006139A1 (en) | 2001-01-25 |
Family
ID=16424945
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2000/004781 WO2001006139A1 (en) | 1999-07-14 | 2000-07-14 | Control type magnetic bearing device and method of judging type of magnetic bearing |
Country Status (5)
Country | Link |
---|---|
US (1) | US6787955B1 (ja) |
JP (1) | JP3786803B2 (ja) |
KR (1) | KR100567629B1 (ja) |
DE (1) | DE10082308B4 (ja) |
WO (1) | WO2001006139A1 (ja) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002349565A (ja) * | 2001-05-28 | 2002-12-04 | Koyo Seiko Co Ltd | 磁気軸受装置における回転体の目標浮上位置設定方法 |
JP4241223B2 (ja) * | 2002-08-30 | 2009-03-18 | 株式会社島津製作所 | 磁気軸受装置 |
US20050174087A1 (en) * | 2004-02-10 | 2005-08-11 | Koyo Seiko Co., Ltd. | Control magnetic bearing device |
JP2004132441A (ja) * | 2002-10-09 | 2004-04-30 | Ntn Corp | 磁気軸受装置、それを用いたエキシマレーザ用貫流ファン装置、磁気軸受のフィードバック制御をコンピュータに実行させるためのプログラム、および磁気軸受のフィードバック制御をコンピュータに実行させるためのプログラムを記録したコンピュータ読み取り可能な記録媒体 |
US7679248B2 (en) * | 2005-09-28 | 2010-03-16 | Shimadzu Corporation | Magnetic bearing system |
DE102007028935B4 (de) * | 2007-06-22 | 2018-12-27 | Saurer Spinning Solutions Gmbh & Co. Kg | Verfahren und Vorrichtung zum Starten einer elektrischen Maschine mit einem magnetisch gelagerten Rotor |
JP5764141B2 (ja) | 2010-11-24 | 2015-08-12 | エドワーズ株式会社 | 磁気軸受の制御装置と該装置を備えた排気ポンプ |
JP5279890B2 (ja) * | 2011-12-29 | 2013-09-04 | 株式会社大阪真空機器製作所 | ラジアル方向制御器及び、それが適用された磁気軸受装置 |
CZ2013205A3 (cs) * | 2013-03-22 | 2014-10-22 | Rieter Cz S.R.O. | Zařízení pro snímání polohy otáčejícího se pracovního prostředku v aktivním magnetickém ložisku |
EP3511585B1 (de) * | 2018-01-15 | 2020-07-08 | Siemens Aktiengesellschaft | Verfahren zur überwachung einer magnetlagervorrichtung |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0752397Y2 (ja) * | 1990-10-05 | 1995-11-29 | セイコー精機株式会社 | ターボ分子ポンプ |
JPH10122182A (ja) * | 1996-10-17 | 1998-05-12 | Shimadzu Corp | ターボ分子ポンプの電源装置 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2700904B2 (ja) * | 1988-10-18 | 1998-01-21 | セイコー精機株式会社 | 磁気浮上体の制御装置 |
JPH0752397A (ja) | 1993-07-22 | 1995-02-28 | Xerox Corp | インクジェット式印字ヘッド用保守キャップ及びワイパ |
JP3421903B2 (ja) * | 1996-07-16 | 2003-06-30 | 光洋精工株式会社 | 工作機械用磁気軸受スピンドル装置 |
US6215218B1 (en) * | 1998-04-09 | 2001-04-10 | Koyo Seiko Co., Ltd. | Control magnetic bearing |
JP2001074049A (ja) * | 1999-09-07 | 2001-03-23 | Ebara Corp | 磁気軸受装置 |
-
1999
- 1999-07-14 JP JP20047599A patent/JP3786803B2/ja not_active Expired - Fee Related
-
2000
- 2000-07-14 DE DE10082308T patent/DE10082308B4/de not_active Expired - Fee Related
- 2000-07-14 WO PCT/JP2000/004781 patent/WO2001006139A1/ja active Application Filing
- 2000-07-14 US US09/786,321 patent/US6787955B1/en not_active Expired - Fee Related
- 2000-07-14 KR KR1020017002999A patent/KR100567629B1/ko not_active IP Right Cessation
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0752397Y2 (ja) * | 1990-10-05 | 1995-11-29 | セイコー精機株式会社 | ターボ分子ポンプ |
JPH10122182A (ja) * | 1996-10-17 | 1998-05-12 | Shimadzu Corp | ターボ分子ポンプの電源装置 |
Also Published As
Publication number | Publication date |
---|---|
US6787955B1 (en) | 2004-09-07 |
JP3786803B2 (ja) | 2006-06-14 |
KR100567629B1 (ko) | 2006-04-05 |
DE10082308T1 (de) | 2001-08-30 |
JP2001027236A (ja) | 2001-01-30 |
KR20010086379A (ko) | 2001-09-10 |
DE10082308B4 (de) | 2007-09-06 |
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