CN101220833A - Axial active magnetic suspension bearing capable of reducing current ripples - Google Patents
Axial active magnetic suspension bearing capable of reducing current ripples Download PDFInfo
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- CN101220833A CN101220833A CNA2008100187474A CN200810018747A CN101220833A CN 101220833 A CN101220833 A CN 101220833A CN A2008100187474 A CNA2008100187474 A CN A2008100187474A CN 200810018747 A CN200810018747 A CN 200810018747A CN 101220833 A CN101220833 A CN 101220833A
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- suspension bearing
- magnetic suspension
- active magnetic
- inductance
- power
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Abstract
The invention provides an axial active magnetic suspension bearing which can reduce a current ripple, belonging to a magnetic suspension bearing. The magnetic suspension bearing is respectively connected in series with a power inductor at the lead-out wire of a positive magnetic pole excitation coil (5) and the lead-out wire of a negative magnetic pole excitation coil (2); the two inductors (5, 6) are respectively connected with the output terminal of a power amplifier (7). By adding two power inductors, the current rippler of the axial active magnetic suspension bearing excitation coil can be reduced, the power loss of the axial active magnetic suspension bearing can be reduced without changing the mechanical structure of the original system and without changing the control parameters of the active magnetic suspension bearing, the performance of the active magnetic suspension bearing is not affected, the required devices are easy to be obtained, and the invention has extremely great practical value.
Description
Technical field
The invention belongs to electric and electronic technical field, be applied to the Active Magnetic Suspending Bearing system.
Background technique
Active Magnetic Suspending Bearing is utilized the contactless supporting of controllable electromagnetic power realization to rotor.Active Magnetic Suspending Bearing produces electromagnetic force according to the electromagnet principle, promptly on the magnetic pole of the stator of Active Magnetic Suspending Bearing around on the field coil of certain number of turn, when having electric current to pass through in the field coil, will in magnetic circuit, produce magnetic field, thereby rotor is produced electromagnetic attraction.The Active Magnetic Suspending Bearing control system is controlled the size of electromagnetic force by electric current in the control field coil.The Active Magnetic Suspending Bearing control system realizes by power amplifier the control of electric current in the field coil.In order to improve the efficient of power amplifier, in the Active Magnetic Suspending Bearing control system, mainly adopt switch power amplifier at present both at home and abroad.In switch power amplifier, power device is operated on off state, has improved efficient, but inevitably causes the control electric current in the field coil that ripple is arranged simultaneously.In actual applications as long as field coil has enough inductance when the power amplifier switching frequency, in the scope that the ripple of the electric current system that just can be controlled at allows.The inductance of field coil can change and change along with its frequency of okperation, and its variation tendency is closely related with magnetic core material.Radial active magnetic suspension bearing stator magnetic circuit and rotor magnetic circuit adopt silicon steel plate stacking to form usually, the eddy current loss of magnetic circuit is smaller, the field coil inductance reduces slower with the frequency of okperation increase, the place still has enough inductance at the power amplifier switching frequency, so the current ripples of radial active magnetic suspension bearing field coil is smaller; Axial active magnetic suspension bearing stator magnetic circuit and rotor magnetic circuit are because the processing technology reason adopts whole soft magnetic material to process usually, magnetic circuit eddy current loss is bigger, the field coil inductance reduces rapidly with the frequency of okperation increase, inductance is less than normal at power amplifier switching frequency place, causes the current ripples of axial active magnetic suspension bearing field coil to be far longer than current ripples in the radial active magnetic suspension bearing field coil.
Summary of the invention
The objective of the invention is to propose a kind of axial active magnetic suspension bearing that can reduce current ripples, thereby reduce the power consumption of axial active magnetic suspension bearing at the problem that exists in the background technique.
The present invention is for reducing the axial active magnetic suspension bearing of current ripples, it is characterized in that, power inductance of lighting outlet series connection of the positive magnetic pole field coil of axial active magnetic suspension bearing, the lighting outlet of negative pole field coil another power inductance of connecting, the other end of power inductance and the other end of another power inductance are connected to the output terminal of power amplifier.The maximum operating currenbt of power inductance and another power inductance is not less than the maximum field current of axial magnetic suspension bearing field coil; When the frequency of okperation of switch power amplifier, the inductance value of each power inductance is between 2mH-3mH; In the operating frequency range of switch power amplifier, the variation of the inductance value of each power inductance is no more than 40% at 50HZ.
Good effect of the present invention is:
The present invention can reduce axial active magnetic suspension bearing field coil current ripples significantly by increasing by two inductance, reduce the power consumption of axial active magnetic suspension bearing, do not need to change the mechanical structure of original system, do not need to change the Control Parameter of Active Magnetic Suspending Bearing, do not influence the performance of Active Magnetic Suspending Bearing.
Description of drawings
Fig. 1 is power inductance of the present invention and axial active magnetic suspension bearing connection diagram.
Among the figure: 1 axial magnetic suspension bearing positive magnetic pole field coil, 2 axial magnetic suspension bearing negative pole field coils, 3 axial magnetic suspension bearing positive magnetic pole field coils lead-in wire, 4 axial magnetic suspension bearing negative pole field coils lead-in wire, 5 power inductances, 6 power inductances, 7 power amplifiers.
Embodiment
Fig. 1 is the composition schematic representation of the present invention's axial active magnetic suspension bearing that can reduce current ripples.Wherein power inductance 5 and another power inductance 6 adopt the good soft magnetic material of high frequency property to make magnetic core, require this power inductance maximum operating currenbt to be not less than the maximum field current of axial magnetic suspension bearing field coil; Power inductance sense value when the switch power amplifier switching frequency between 2mH-3mH; Power inductance is no more than 40% changing from 50HZ to switch power amplifier switching frequency scope internal inductance value.
Power inductance both can directly be bought from relevant producer, also can design voluntarily.If design voluntarily, the magnetic core that high frequency property is good has had a large amount of standard models to buy in the electronic market, the model of magnetic core is selected for use, the gap of magnetic circuit determine and coil turn really normal root can draw according to the inductance formula.Inductance adopts dipping lacquer to handle.
The power inductance 5,6 that coiling is good and two field coils 1,2 of axial magnetic suspension bearing are cascaded respectively, power amplifier 7 outputs that insert former axial magnetic suspension bearing field coil correspondence then get final product, and power inductance and axial active magnetic suspension bearing Placement are as shown in Figure 1.
Claims (2)
1. axial active magnetic suspension bearing that can reduce current ripples, it is characterized in that, lighting outlet (a 3) series connection power inductance (5) of the positive magnetic pole field coil (1) of axial active magnetic suspension bearing, the lighting outlet (4) of negative pole field coil (2) another power inductance (6) of connecting, the other end of the other end of power inductance (5) and another power inductance (6) is connected respectively to the output terminal of power amplifier (7).
2. the axial active magnetic suspension bearing that can reduce current ripples according to claim 1, it is characterized in that the maximum operating currenbt of described power inductance (5) and another power inductance (6) is not less than the maximum field current of axial magnetic suspension bearing field coil; When the frequency of okperation of switch power amplifier, the inductance value of each power inductance is between 2mH-3mH; In the operating frequency range of switch power amplifier, the variation of the inductance value of each power inductance is no more than 40% at 50HZ.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2008100187474A CN100545473C (en) | 2008-01-22 | 2008-01-22 | Can reduce the axial active magnetic suspension bearing of current ripples |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2008100187474A CN100545473C (en) | 2008-01-22 | 2008-01-22 | Can reduce the axial active magnetic suspension bearing of current ripples |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101220833A true CN101220833A (en) | 2008-07-16 |
| CN100545473C CN100545473C (en) | 2009-09-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2008100187474A Expired - Fee Related CN100545473C (en) | 2008-01-22 | 2008-01-22 | Can reduce the axial active magnetic suspension bearing of current ripples |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100545473C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101761365B (en) * | 2009-12-31 | 2011-12-14 | 绍兴文理学院 | Vibration damping system for self-test electromagnetic suspension bearing of steam turbine |
| CN102518664A (en) * | 2011-12-07 | 2012-06-27 | 清华大学 | Device used for reducing ring vortex of axial electromagnetic bearing |
| CN111059148A (en) * | 2019-12-27 | 2020-04-24 | 珠海格力电器股份有限公司 | Axial magnetic suspension bearing, motor, compressor and air conditioner |
| CN114135581A (en) * | 2021-11-15 | 2022-03-04 | 西安航天精密机电研究所 | Magnetic suspension bearing system and control method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1291545C (en) * | 2005-07-08 | 2006-12-20 | 北京航空航天大学 | Low-ripple switch power amplifier for permanent magnet biased electromagnetic-bearing |
-
2008
- 2008-01-22 CN CNB2008100187474A patent/CN100545473C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101761365B (en) * | 2009-12-31 | 2011-12-14 | 绍兴文理学院 | Vibration damping system for self-test electromagnetic suspension bearing of steam turbine |
| CN102518664A (en) * | 2011-12-07 | 2012-06-27 | 清华大学 | Device used for reducing ring vortex of axial electromagnetic bearing |
| CN111059148A (en) * | 2019-12-27 | 2020-04-24 | 珠海格力电器股份有限公司 | Axial magnetic suspension bearing, motor, compressor and air conditioner |
| CN114135581A (en) * | 2021-11-15 | 2022-03-04 | 西安航天精密机电研究所 | Magnetic suspension bearing system and control method thereof |
| CN114135581B (en) * | 2021-11-15 | 2023-10-20 | 西安航天精密机电研究所 | Magnetic suspension bearing system and control method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100545473C (en) | 2009-09-30 |
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Application publication date: 20080716 Assignee: Nanjing CIGU Limited Corporation Assignor: Nanjing University of Aeronautics and Astronautics Contract record no.: 2017320000090 Denomination of invention: Axial active magnetic suspension bearing capable of reducing current ripples Granted publication date: 20090930 License type: Common License Record date: 20170317 |
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Granted publication date: 20090930 Termination date: 20200122 |
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| CF01 | Termination of patent right due to non-payment of annual fee |