CN115360880B - Wound core thrust magnetic bearing - Google Patents
Wound core thrust magnetic bearing Download PDFInfo
- Publication number
- CN115360880B CN115360880B CN202211289923.4A CN202211289923A CN115360880B CN 115360880 B CN115360880 B CN 115360880B CN 202211289923 A CN202211289923 A CN 202211289923A CN 115360880 B CN115360880 B CN 115360880B
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- stator
- thrust
- core
- magnetic bearing
- stator core
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- 230000005284 excitation Effects 0.000 claims abstract description 25
- 239000000463 material Substances 0.000 claims abstract description 14
- 238000004804 winding Methods 0.000 claims abstract description 12
- 229910000976 Electrical steel Inorganic materials 0.000 claims description 9
- 239000004020 conductor Substances 0.000 claims description 3
- 239000011162 core material Substances 0.000 description 50
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 16
- 229910052742 iron Inorganic materials 0.000 description 7
- 238000003475 lamination Methods 0.000 description 5
- 239000000696 magnetic material Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K16/00—Machines with more than one rotor or stator
- H02K16/04—Machines with one rotor and two stators
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- 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
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- 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
- F16C32/0493—Active magnetic bearings for rotary movement integrated in an electrodynamic machine, e.g. self-bearing motor
- F16C32/0495—Active magnetic bearings for rotary movement integrated in an electrodynamic machine, e.g. self-bearing motor generating torque and axial force
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/02—Details of the magnetic circuit characterised by the magnetic material
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/14—Stator cores with salient poles
- H02K1/146—Stator cores with salient poles consisting of a generally annular yoke with salient poles
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2205/00—Specific aspects not provided for in the other groups of this subclass relating to casings, enclosures, supports
- H02K2205/03—Machines characterised by thrust bearings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
Abstract
The present application provides a wound core thrust magnetic bearing comprising: the stator comprises a thrust disc, a stator core and a plurality of magnet exciting coils. The rotor is located to the thrust dish cover, and two stator core set up respectively in the left and right sides of thrust dish, and stator core is provided with a plurality of stator salient poles in the axial direction of rotor, and the stator salient pole of the left and right sides of thrust dish sets up in opposite directions, and a plurality of excitation coil correspondence set up on a plurality of stator salient poles. Wherein, the stator core is formed by winding a strip material. The wound core thrust magnetic bearing is novel in structure, the stator core can be made by winding and forming the magnetic conduction material strips, so that eddy current generated by each excitation coil is limited in the thickness range of the stator core strip, the eddy current loss of the thrust magnetic bearing can be remarkably reduced, and the power consumption of the thrust magnetic bearing is reduced.
Description
Technical Field
The application relates to the field of magnetic suspension motors, in particular to a wound iron core thrust magnetic bearing.
Background
In the field of magnetic suspension motors, in a traditional active thrust magnetic bearing structure, two stators are respectively arranged on two sides of a thrust disc, excitation coils are installed in excitation coil grooves of the stators, and electromagnetic forces on the left side and the right side respectively act on two end faces of the thrust disc, so that axial forces in different directions are balanced. The end face of the stator of the active thrust magnetic bearing with the structure is required to be provided with an excitation coil ring groove, the stator is difficult to be manufactured by stamping silicon steel laminations, most of the stators are made of low-carbon steel materials by turning, and the stator of the non-silicon steel laminations is large in iron loss as an electromagnetic iron core, so that the eddy current loss of the thrust magnetic bearing is large and the power consumption is high.
Disclosure of Invention
In order to solve the problems, a wound core thrust magnetic bearing is provided.
The present application provides a wound core thrust magnetic bearing comprising: the stator comprises a thrust disc, a stator core and a plurality of magnet exciting coils;
the thrust disc is sleeved on the rotor, the two stator cores are respectively arranged on the left side and the right side of the thrust disc, the stator cores are provided with a plurality of stator salient poles in the axial direction of the rotor, the stator salient poles on the left side and the right side of the thrust disc are oppositely arranged, and the plurality of excitation coils are correspondingly arranged on the plurality of stator salient poles; wherein the stator core is formed by winding a strip.
The stator core and the plurality of stator salient poles are of an integral structure, and the plurality of stator salient poles are processed on the stator core after the stator core is formed by winding a strip.
The stator core is made of a magnetic material, and the magnetic material comprises a silicon steel sheet.
The number of the stator salient poles comprises integral multiple of 2, and the stator salient poles are symmetrically distributed by taking the axis of the rotor as a center.
The polarities of the magnetic poles of the two adjacent exciting coils of the stator core are opposite, and a pair of magnetic pole pairs is formed together; the adjacent poles of adjacent pole pairs have the same polarity.
The two excitation coils in each side magnetic pole pair are connected in parallel or in series, and/or the excitation coils between the magnetic pole pairs are connected in parallel or in series.
And the excitation coils of the opposite magnetic pole pairs on the two stator cores on the left side and the right side of the thrust disc are subjected to differential control, or each side of all the excitation coils of the stator cores on the left side and the right side of the thrust disc is subjected to integral differential control.
The wound core thrust magnetic bearing further comprises a working gap, and the working gap is formed by a unilateral gap between the thrust disc and the stator core.
Compared with the prior art, the method has the following beneficial effects: the utility model provides a wound core thrust magnetic bearing novel structure, stator core can adopt magnetic conduction material coiled material to roll into the type and make, reduces the iron loss to make the vortex restriction that each excitation coil produced in the thickness range of stator core coiled material, can obviously reduce the eddy current loss, reduced thrust magnetic bearing's consumption.
Drawings
To more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.
FIG. 1 is a schematic view of a thrust magnetic bearing in the prior art.
FIG. 2 is a schematic diagram of a wound core thrust magnetic bearing shown in accordance with an exemplary embodiment.
In the figure, 1, rotor; 2. a thrust disc; 3. a stator core; 4. a field coil; 5. a working gap; 6. stator salient poles;
101. a rotor; 102. a thrust disc; 103. a stator; 104. a field coil; 105. a working gap; 106. and an exciting coil slot.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.
In the description of the present application, it is further noted that, unless expressly stated or limited otherwise, the terms "disposed," "mounted," and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; may be directly connected or may be indirectly connected through an intermediate. The specific meaning of the above terms in this application will be understood to be a specific case for those of ordinary skill in the art.
In the prior art, as shown in fig. 1, a conventional active thrust magnetic bearing structure includes: rotor 101, thrust disc 102, stator 103, and field coil 104. The two stators 103 are respectively arranged on the left and right sides of the thrust disc 102, and maintain a certain working gap 105 with the thrust disc 102, the stators 103 are provided with excitation coil slots 106, and the excitation coils 104 are installed in the excitation coil slots 106. Electromagnetic forces on the left and right sides of the thrust disc 102 act on the thrust disc 102, respectively, so as to balance axial forces in different directions. The stator 103 of the active thrust magnetic bearing with the structure is difficult to be manufactured by stamping silicon steel laminations due to the fact that the exciting coil slots 106 need to be arranged, most of the stator 103 is made of low-carbon steel materials through turning, and the stator 103 of the non-silicon steel laminations is used as an electromagnetic core and is large in iron loss, so that eddy current loss of the stator 103 is large, and power consumption of the thrust magnetic bearing is increased.
The present application provides a wound core thrust magnetic bearing comprising: the stator comprises a thrust disc, a stator core and a plurality of magnet exciting coils. The rotor is located to the thrust disc cover, and two stator core set up respectively in the left and right sides of thrust disc, and stator core is provided with a plurality of stator salient poles in the axial direction of rotor, and the stator salient pole of the left and right sides of thrust disc sets up in opposite directions, and a plurality of excitation coil correspond to set up on a plurality of stator salient poles. Wherein, the stator core is formed by winding a strip material. The utility model provides a wound core thrust magnetic bearing novel structure, stator core can adopt magnetic materials coiling shaping to make, reduces the iron loss to make the vortex restriction that each excitation coil produced in the thickness scope of stator core coiled material, can obviously reduce the vortex loss when thrust disc rotates, reduced thrust magnetic bearing's consumption.
According to an exemplary embodiment, as shown in fig. 2, a wound core thrust magnetic bearing includes a thrust plate 2, a stator core 3, and a plurality of field coils 4.
As shown in fig. 2, the thrust disc 2 is sleeved on the rotor 1, and the two stator cores 3 are respectively disposed on the left and right sides of the thrust disc 2. The one-sided gap between the thrust disk 2 and the stator core 3 constitutes a working gap 5. The stator core 3 is provided with a plurality of stator salient poles 6 in the axial direction of the rotor 1, the stator salient poles 6 on the left and right sides of the thrust plate 2 are arranged in opposition, and the plurality of field coils 4 are correspondingly arranged on the plurality of stator salient poles 6. Wherein the stator core 3 is formed by winding a strip.
In this embodiment, stator core 3 chooses for use magnetic material coiling shaping to make, specifically can choose for use silicon steel sheet to make, has reduced the stator iron loss, has solved among the prior art stator and has been difficult to adopt punching press silicon steel lamination preparation, leads to the big problem of electromagnetic core iron loss.
In the present embodiment, the stator core 3 and the plurality of stator salient poles 6 are an integral structure, and after the stator core 3 is formed by winding a strip material, the plurality of stator salient poles 6 are processed on the stator core 3. The stator core 3 and the plurality of stator salient poles 6 of the integrated structure are convenient to process and manufacture, and the manufacturing difficulty is low. In some other embodiments, the stator core 3 and the plurality of stator salient poles 6 may be in a split structure, and the stator salient poles 6 made of different materials are adopted according to different requirements of the stator salient poles 6, so that the application scenarios are enriched.
The number of the stator salient poles 6 is an integral multiple of 2, and the stator salient poles are symmetrically distributed with the axis of the rotor 1 as the center. As shown in fig. 2, in the present embodiment, four stator salient poles 6 are selected, and four corresponding field coils 4 are also selected. The adjacent two field coils 4 have opposite magnetic poles, and together form a pair of field coil magnetic pole pairs, and as shown in fig. 2, the upper left field coil 4 is N-level and the upper right field coil 4 is S-level, respectively, and together form a pair of field coil magnetic pole pairs. The adjacent magnetic poles of the adjacent magnetic pole pairs have the same magnetic polarity, i.e., the N-level at the bottom left and the N-level at the top left are the same as each other, and the S-level is also the same at the top and bottom, as shown in fig. 2. The stator salient poles 6 and the magnet exciting coils 4 are arranged, so that the magnetic flux direction of the working magnetic pole pairs enters the S level from the N level, the adjacent magnetic poles of the adjacent magnetic pole pairs are the same, the magnetic leakage among the magnetic poles is avoided, and the control magnetic flux coupling is reduced.
The number of the stator salient poles 6 is not limited, the number is integral multiple of 2, and the number can be set to be eight, twelve, sixteen and the like according to actual production requirements.
The two excitation coils 4 in each magnetic pole pair are connected in parallel or in series, and the excitation coils 4 between the magnetic pole pairs can also be connected in parallel or in series. The excitation coils 4 of the magnetic pole pairs corresponding to each other on the two stator cores 3 on the left and right sides of the thrust disc 2 are respectively controlled in a differential manner, or all the excitation coils 4 of the stator cores 3 on the left and right sides of the thrust disc 2 are taken as a whole, and the left and right sides are controlled in a differential manner integrally, so that the work task of the wound core thrust magnetic bearing is jointly completed.
In conclusion, the wound core thrust magnetic bearing is novel in structure, the stator core of the thrust magnetic bearing is manufactured by adopting a strip winding process, the stator core material is formed by winding sheet-shaped magnetic conductive materials such as silicon steel sheets, so that the iron loss is reduced, compared with the traditional axial magnetic bearing, the form of the winding of the excitation coil is changed, the eddy current generated by each excitation coil is limited within the thickness range of the coiled material of the stator core, the eddy current loss of the magnetic bearing can be obviously reduced, and the power consumption of the thrust magnetic bearing is reduced.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and are not limited thereto. Although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present disclosure.
Claims (5)
1. A wound core thrust magnetic bearing, comprising: the stator comprises a thrust disc (2), a stator core (3) and a plurality of excitation coils (4);
the thrust disc (2) is sleeved on the rotor (1), the two stator cores (3) are respectively arranged on the left side and the right side of the thrust disc (2), the stator cores (3) are provided with a plurality of stator salient poles (6) in the axial direction of the rotor (1), the stator salient poles (6) on the left side and the right side of the thrust disc (2) are oppositely arranged, and the magnet exciting coils (4) are correspondingly arranged on the stator salient poles (6); wherein the stator core (3) is formed by winding a strip material;
wherein the number of the stator salient poles (6) comprises an integral multiple of 2, and the stator salient poles (6) are symmetrically distributed by taking the axis of the rotor (1) as a center;
the polarities of the magnetic poles of two adjacent exciting coils (4) on the stator core (3) are opposite, and a pair of magnetic pole pairs is formed together; the adjacent magnetic poles of the two adjacent magnetic pole pairs have the same polarity; the differential control of the exciting coils (4) of the opposite magnetic pole pairs on the two stator cores (3) on the left side and the right side of the thrust disc (2), or the differential control of the whole left side and the whole right side of all the exciting coils (4) of the stator cores (3) on the left side and the right side of the thrust disc (2) as a whole.
2. The wound core thrust magnetic bearing of claim 1,
the stator core (3) and the plurality of stator salient poles (6) are of an integral structure, and the plurality of stator salient poles (6) are processed on the stator core (3) after the stator core (3) is formed by winding a strip.
3. The wound core thrust magnetic bearing of claim 2,
the material of the stator core (3) comprises a magnetic conductive material, and the magnetic conductive material comprises a silicon steel sheet.
4. The wound core thrust magnetic bearing of claim 1,
on each side, the two excitation coils (4) in the magnetic pole pair are connected in parallel or in series, and/or the excitation coils (4) between the magnetic pole pair are connected in parallel or in series.
5. The wound core thrust magnetic bearing of claim 1,
the wound core thrust magnetic bearing further comprises a working gap (5), and a unilateral gap between the thrust disc (2) and the stator core (3) forms the working gap (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211289923.4A CN115360880B (en) | 2022-10-21 | 2022-10-21 | Wound core thrust magnetic bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211289923.4A CN115360880B (en) | 2022-10-21 | 2022-10-21 | Wound core thrust magnetic bearing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115360880A CN115360880A (en) | 2022-11-18 |
| CN115360880B true CN115360880B (en) | 2023-03-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211289923.4A Active CN115360880B (en) | 2022-10-21 | 2022-10-21 | Wound core thrust magnetic bearing |
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| CN (1) | CN115360880B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115681329B (en) * | 2023-01-04 | 2023-03-21 | 山东天瑞重工有限公司 | Permanent magnet biased magnetic bearing |
| CN115853901A (en) * | 2023-02-10 | 2023-03-28 | 山东天瑞重工有限公司 | Magnetic suspension bearing system and magnetic suspension motor |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1312832C (en) * | 2001-12-17 | 2007-04-25 | 乐金电子(天津)电器有限公司 | Disk type motor |
| JP5388904B2 (en) * | 2010-03-03 | 2014-01-15 | 三菱電機株式会社 | Rotating motor |
| CN102392852B (en) * | 2011-11-03 | 2014-05-14 | 北方工业大学 | Axial magnetic bearing |
| CN104632891B (en) * | 2015-03-03 | 2017-05-17 | 武汉理工大学 | Laminated iron core type six-ring redundant axial magnetic bearing |
| CN206918077U (en) * | 2017-06-12 | 2018-01-23 | 珠海格力节能环保制冷技术研究中心有限公司 | Axial magnetic suspension bearing, magnetic suspension system and compressor |
| CN109038991A (en) * | 2018-09-12 | 2018-12-18 | 北京航空航天大学 | A kind of 36/4 structure high-speed magneto |
| CN111609035A (en) * | 2020-04-17 | 2020-09-01 | 北京航空航天大学宁波创新研究院 | Active and passive magnetic suspension bearing |
| CN215870929U (en) * | 2021-04-28 | 2022-02-18 | 上海福格纳机电有限公司 | Single-phase disc type brushless direct current limited angle motor stator, stator yoke and actuator |
| CN113839516A (en) * | 2021-10-27 | 2021-12-24 | 苏州苏磁智能科技有限公司 | Stator module for axial suspension, magnetic suspension motor and linear electromagnetic actuating mechanism |
| CN115149669A (en) * | 2022-08-19 | 2022-10-04 | 山东磁悬浮产业技术研究院有限公司 | High-speed amorphous alloy motor |
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Denomination of invention: A type of wound iron core thrust magnetic bearing Granted publication date: 20230331 Pledgee: Weifang Re-guarantee Group Co.,Ltd. Pledgor: SHANDONG TIANRUI HEAVY INDUSTRY Co.,Ltd. Registration number: Y2024980004256 |