JPS6483916A - Control type magnetic bearing device - Google Patents
Control type magnetic bearing deviceInfo
- Publication number
- JPS6483916A JPS6483916A JP24074187A JP24074187A JPS6483916A JP S6483916 A JPS6483916 A JP S6483916A JP 24074187 A JP24074187 A JP 24074187A JP 24074187 A JP24074187 A JP 24074187A JP S6483916 A JPS6483916 A JP S6483916A
- Authority
- JP
- Japan
- Prior art keywords
- displacement
- circuits
- electromagnets
- coefficient
- displacement sensors
- 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.)
- Pending
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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Mechanical Engineering (AREA)
- Magnetic Bearings And Hydrostatic Bearings (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
PURPOSE:To enable strict control of a bearing device having no connection with positions for fitting displacement sensors and electromagnets by providing a position correcting circuit for correcting the detected values of the displacement sensors to the displacement values at the positions where the suction forces of the electromagnets are applied. CONSTITUTION:The signals of displacement sensors S1, S1' and S2, S2' for detecting the displacement of a rotary body 1 are multiplied, through displacement detecting circuits 2, 2', by constant (l1-l2)/l1 at coefficient circuits 3, 3', and by constant l2/l1 at coefficient circuits 7, 7' respectively, due to relative positions l1, l2 between the displacement sensors S1, S1', S2, S2' and the electromagnets A1, A1', A2, A2' and they are corrected to displacement value at the position where the suction forces of the magnets are applied. The signals from the coefficient circuit 3, 7' and 3', 7 are respectively added to addition circuits 4, 4', control circuits 5, 5' and driving currents to the electromagnets A1, A1', A2, A2' are controlled through electric power amplification circuits 6, 6'. Thus, strict control can be carried out by the displacement values at the position where the suction force of the electromagnets are applied and also the degree of freedom of a structural design and lay-out can be improved.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP24074187A JPS6483916A (en) | 1987-09-28 | 1987-09-28 | Control type magnetic bearing device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP24074187A JPS6483916A (en) | 1987-09-28 | 1987-09-28 | Control type magnetic bearing device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6483916A true JPS6483916A (en) | 1989-03-29 |
Family
ID=17064008
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP24074187A Pending JPS6483916A (en) | 1987-09-28 | 1987-09-28 | Control type magnetic bearing device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6483916A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5084643A (en) * | 1991-01-16 | 1992-01-28 | Mechanical Technology Incorporated | Virtual rotor balancing in magnetic bearings |
US5247219A (en) * | 1991-06-27 | 1993-09-21 | Matsushita Electric Industrial Co., Ltd. | Control apparatus of magnetic bearing |
WO2015079802A1 (en) * | 2013-11-29 | 2015-06-04 | エドワーズ株式会社 | Magnetic bearing device and vacuum pump |
-
1987
- 1987-09-28 JP JP24074187A patent/JPS6483916A/en active Pending
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5084643A (en) * | 1991-01-16 | 1992-01-28 | Mechanical Technology Incorporated | Virtual rotor balancing in magnetic bearings |
US5247219A (en) * | 1991-06-27 | 1993-09-21 | Matsushita Electric Industrial Co., Ltd. | Control apparatus of magnetic bearing |
WO2015079802A1 (en) * | 2013-11-29 | 2015-06-04 | エドワーズ株式会社 | Magnetic bearing device and vacuum pump |
JP2015105680A (en) * | 2013-11-29 | 2015-06-08 | エドワーズ株式会社 | Magnetic bearing device and vacuum pump |
US10359046B2 (en) | 2013-11-29 | 2019-07-23 | Edwards Japan Limited | Magnetic bearing device and vacuum pump |
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