CN203463494U - Permanent-magnet biased axial magnetic suspension bearing - Google Patents
Permanent-magnet biased axial magnetic suspension bearing Download PDFInfo
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- CN203463494U CN203463494U CN201320354466.2U CN201320354466U CN203463494U CN 203463494 U CN203463494 U CN 203463494U CN 201320354466 U CN201320354466 U CN 201320354466U CN 203463494 U CN203463494 U CN 203463494U
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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
- F16C2360/00—Engines or pumps
- F16C2360/44—Centrifugal pumps
- F16C2360/45—Turbo-molecular pumps
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- Magnetic Bearings And Hydrostatic Bearings (AREA)
Abstract
The utility model provides a permanent-magnet biased axial magnetic suspension bearing, belonging to a hybrid magnetic suspension bearing in the magnetic suspension bearing. The permanent-magnet biased axial magnetic suspension bearing comprises a main shaft, a left rotor magnetic-conducting ring, a left rotor magnetic pole ring, a stator magnetic pole ring A, a left stator sleeve, a left control winding, a stator magnetic pole ring B, a stator magnetic-conducting bridge ring, a stator magnetic pole ring C, a right stator sleeve, a right control winding, a stator magnetic pole ring D, a right rotor magnetic pole ring B, a right rotor magnetic-conducting ring and a permanent magnet ring, wherein the left rotor magnetic pole ring and the right rotor magnetic pole ring are same in shape, the left rotor magnetic-conducting ring and the right rotor magnetic-conducting ring are same in shape, the left stator sleeve and the right stator sleeve are same in shape, and the stator magnetic pole ring A, the stator magnetic pole ring B, the stator magnetic pole ring C and the stator magnetic pole ring D are same in shape. The whole magnetic suspension bearing has the advantages of simple structure, small size, light weight, small power consumption and low cost and has wide application prospects in various magnetic suspension systems such as flywheel energy storage, turbo molecular pumps and the like.
Description
Technical field
The utility model relates to magnetic suspension bearing technical field, is specifically related to a kind of permanent magnet biased axial magnetic suspension bearing.
Background technique
The difference that magnetic suspension bearing is set up mode according to magnetic field can be divided into full electromagnetic type, permanent-magnet type and hybrid type three types.
Full electromagnetic type magnetic suspension bearing is set up bias magnetic field by passing into galvanic magnetic bias winding in air gap, by the control winding that passes into size and Orientation and be all subject to the alternating current controlled in real time, in air gap, set up controlling magnetic field, the stack of these two magnetic fields in air gap and counteracting have produced the magnetic field suction that size and Orientation can ACTIVE CONTROL, thereby realized the stable suspersion of rotor, such magnetic suspension bearing rigidity is large, can accurately control, but it is also all larger to produce unit bearing capacity required volume, weight and power consumption.
The suspension that permanent-magnet type magnetic suspension bearing utilizes suction between magnetic material or repulsion to realize rotor, required controller is simple, and power consumption is little, but rigidity and damping are also all smaller.
Hybrid magnetic suspension bearing combines the feature of active magnetic suspension bearing and passive-type magnetic suspension bearing, adopt permanent-magnet material to substitute magnetic bias coil and produce required bias magnetic field, so active magnetic suspension bearing much less of electromagnetic coil turn ratio, reduce largely the power loss of magnetic suspension bearing, reduced to produce the required volume and weight of unit bearing capacity.Above feature makes it to volume and power consumption, have the field of strict demand to have irreplaceable advantage, so hybrid magnetic suspension bearing has become an important directions of magnetic suspension bearing research and development.
Model utility content
The purpose of this utility model is to solve that prior art exists is that magnetic bearing structure is complicated, the technical problem that power consumption is higher.
The utility model provides a kind of permanent magnet biased axial magnetic suspension bearing, comprising:
Stator magnetic conduction bridged ring, its left and right sides arranges respectively stator left sleeve and the right sleeve of stator, the left and right, inner side of stator left sleeve arranges respectively stator magnet polar ring A and stator magnet polar ring B, and the left and right, inner side of the right sleeve of stator arranges respectively stator magnet polar ring C and stator magnet polar ring D;
Be sleeved on the magnet ring on main shaft, its left and right sides arranges respectively the left magnetic guiding loop of the rotor being sleeved on main shaft and the right magnetic guiding loop of rotor, in the left side of the left magnetic guiding loop of rotor and the right side of the right magnetic guiding loop of rotor, the left pole ring of the rotor being sleeved on main shaft and the right pole ring of rotor is set respectively;
Left control winding is arranged in the intracavity space being surrounded by stator left sleeve, stator magnet polar ring A, stator magnet polar ring B and the left pole ring of rotor;
Right control winding is arranged on by the right sleeve of stator, stator magnet polar ring C, stator magnet polar ring D and the right pole ring of rotor and surrounds in another intracavity space.
Permanent magnet biased axial magnetic suspension bearing of the present utility model, utilize the annular permanent magnet of a radial magnetizing in axial air-gap, to set up quiescent biasing magnetic field, the control magnetic flux of axially controlling winding output superposes in axial air-gap with biasing magnetic flux, thereby realizes axial stable suspersion.Whole magnetic bearing structure is simple, easy for installation, and power consumption is little, and cost is low, at flywheel energy storage, in the various magnetic suspension systems such as whirlpool energy molecular pump, all has broad application prospects.
Accompanying drawing explanation
Fig. 1 is permanent magnet biased axial magnetic suspension bearing axial cross section schematic diagram of the present utility model;
Fig. 2 is permanent magnet biased axial magnetic suspension bearing schematic diagram of the present utility model.
In figure: 1, main shaft, 2, the left magnetic guiding loop of rotor, 3, the left pole ring of rotor, 4, stator magnet polar ring A, 5, stator left sleeve, 6, left control winding, 7, stator magnet polar ring B, 8, stator magnetic conduction bridged ring, 9, stator magnet polar ring C, 10, the right sleeve of stator, 11, right control winding, 12, stator magnet polar ring D, 13, the right pole ring of rotor, 14, the right magnetic guiding loop of rotor, 15 magnet rings.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in further detail:
Fig. 1 is the utility model permanent magnet biased axial magnetic suspension bearing axial cross section schematic diagram, the left magnetic guiding loop 2 of rotor in figure, the left pole ring 3 of rotor, stator magnet polar ring A4, stator left sleeve 5, stator magnet polar ring B7, stator magnetic conduction bridged ring 8, stator magnet polar ring C9, the right sleeve 10 of stator, stator magnet polar ring D12, the right pole ring 13 of rotor and the right magnetic guiding loop 14 of rotor are solid soft magnetic material and make, magnet ring 15 is made by permanent-magnet materials such as rare earths, main shaft 1 is made by non-magnet_conductible material, and left control winding 6 and right control winding 11 are by enameled cable coiling.
The left pole ring 3 of rotor is identical with the shape of the right pole ring 13 of rotor, the left magnetic guiding loop 2 of rotor is identical with the shape of the right magnetic guiding loop 14 of rotor, stator left sleeve 5 is identical with the shape of the right sleeve 10 of stator, and the shape of stator magnet polar ring A4, stator magnet polar ring B7, stator magnet polar ring C9 and stator magnet polar ring D12 is also identical.
In rotor-side, magnet ring 15 left and right sides that are enclosed within on main shaft 1 are distinguished the left magnetic guiding loop 2 of rotor bushing with the right magnetic guiding loop 14 of rotor again and contact with magnet ring 15 respectively, in the left pole ring 3 of left side rotor bushing the contact of the left magnetic guiding loop 2 of rotor, in the right pole ring 13 of right side rotor bushing the contact of the right magnetic guiding loop 14 of rotor.
In stator side, the left and right sides of stator magnetic conduction bridged ring 8 is installed respectively stator left sleeve 5 with the right sleeve 10 of stator and is contacted with stator magnetic conduction bridged ring 8 respectively, in the left and right, inner side of stator left sleeve 5, stator magnet polar ring A4 being installed respectively contacts with stator magnet polar ring B7 and with stator left sleeve 5, and stator left sleeve 5, stator magnet polar ring A4, stator magnet polar ring B7 and the left pole ring 3 of rotor surround an intracavity space, place left control winding 6 in this intracavity space.In the left and right, inner side of the right sleeve 10 of stator, stator magnet polar ring C9 being installed respectively contacts with stator magnet polar ring D12 and with the right sleeve 10 of stator, and the right sleeve 10 of stator, stator magnet polar ring C9, stator magnet polar ring D12 and the right pole ring 13 of rotor also surround another intracavity space, place right control winding 11 in this intracavity space.
Between said stator pole ring A4 inner side and main shaft 1, between the left pole ring of stator magnet polar ring A4 right side and rotor 3 left sides, between the left pole ring of left control winding 6 and rotor 3 outsides, between stator magnet polar ring B7 inner side and the left magnetic guiding loop of rotor 2 outsides, between stator magnet polar ring B7 left side and the left pole ring of rotor 3 right sides, stator magnet polar ring D12 inner side and and main shaft 1 between, between stator magnet polar ring D12 left side and the right pole ring of rotor 13 right sides, between the right pole ring of right control winding 11 and rotor 13 outsides, between stator magnet polar ring C9 inner side and the right magnetic guiding loop of rotor 14 outsides, between 13 left sides, all there is air gap in the right pole ring of stator magnet polar ring C9 right side and rotor.
Between the left pole ring of stator magnet polar ring A4 right side and rotor 3 left sides, between stator magnet polar ring B7 left side and the left pole ring of rotor 3 right sides, between stator magnet polar ring D12 left side and the right pole ring of rotor 13 right sides, between the right pole ring of stator magnet polar ring C9 right side and rotor 13 left sides, the effect of air gap is mainly the medium of storage tape energy, and its preferable width is 0.2～1.2mm.
Between stator magnet polar ring A4 inner side and main shaft 1, between the left pole ring of left control winding 6 and rotor 3 outsides, between stator magnet polar ring B7 inner side and the left magnetic guiding loop of rotor 2 outsides, between stator magnet polar ring D12 inner side and main shaft 1, between the right pole ring of right control winding 11 and rotor 13 outsides, the effect of the air gap between stator magnet polar ring C9 inner side and the right magnetic guiding loop of rotor 14 outsides is mainly to prevent that between each parts, generation contacts, and reduces the leakage field of whole magnetic suspension bearing, and its preferable width is 2～5mm.
Fig. 2 is permanent magnet biased axial magnetic suspension bearing schematic diagram of the present utility model, and single arrow represents to control the magnetic field that winding produces, and double-head arrow represents permanent magnet bias magnetic field.The magnetic flux of the magnet ring 15 of axial charging, by the left magnetic guiding loop 2 of rotor, the left pole ring 3 of rotor and be divided into two-way, one tunnel through left side and the air gap between stator magnet polar ring A4 right side of the left pole ring 3 of rotor, enter stator magnet polar ring A4 and stator left sleeve 5, another road through the air gap between on the left of the right side of the left pole ring 3 of rotor and stator magnet polar ring B7, enter stator magnet polar ring B7 and stator left sleeve 5.Two-way permanent magnet bias magnetic field is finally converged and is flow to the right sleeve 10 of stator in stator magnetic conduction bridged ring 8, and be again divided into two-way, one tunnel enters stator magnet polar ring C9 and passes the air gap between stator magnet polar ring C9 right side and the right pole ring of rotor 13 left sides, an other road enters stator magnet polar ring D12 and passes the air gap between stator magnet polar ring D12 left side and the right pole ring of rotor 13 right sides, and finally after the right pole ring 13 of rotor collects, flow into the right magnetic guiding loop 14 of rotor, finally return to the S utmost point of magnet ring 15.The permanent magnetic field that whole magnet ring 15 produces is between the left side and stator magnet polar ring A4 right side of the left pole ring 3 of rotor, between the right side of the left pole ring 3 of rotor and stator magnet polar ring B7 left side, between the right pole ring of stator magnet polar ring C9 right side and rotor 13 left sides, in the air gap between stator magnet polar ring D12 left side and the right pole ring of rotor 13 right sides, set up bias magnetic field.
Left control winding 6 passes into after electric current, by stator left sleeve 5, stator magnet polar ring A4, the left pole ring 3 of rotor, stator magnet polar ring B7, form magnetic loop, between the left side and stator magnet polar ring A4 right side of the left pole ring 3 of rotor, in the air gap between the right side of the left pole ring 3 of rotor and stator magnet polar ring B left side, set up controlling magnetic field.
Right control winding 11 passes into after electric current, by the right sleeve 10 of stator, stator magnet polar ring C9, the right pole ring 13 of rotor, stator magnet polar ring D12, form magnetic loop, between stator magnet polar ring C9 right side and the right pole ring of rotor 13 left sides, in the air gap between stator magnet polar ring D12 left side and the right pole ring of rotor 13 right sides, set up controlling magnetic field.
When the left pole ring 3 of rotor and the right pole ring 13 of rotor are positioned at axial neutral position, be that magnetic bearing rotor is when equilibrium position, symmetry properties due to structure, the magnetic flux that magnet ring 15 produces is between stator magnet polar ring A4 right side and the left pole ring of rotor 3 left sides, between stator magnet polar ring B7 left side and the left pole ring of rotor 3 right sides, the right pole ring of stator magnet polar ring C9 right side and rotor 13 left sides, stator magnet polar ring D12 left side equates with the air gap place between the right pole ring of rotor 13 right sides, now the suffered left and right suction of the left pole ring 3 of rotor and the right pole ring 13 of rotor is all equated.
If now the left pole ring 3 of rotor and the right pole ring 13 of rotor are subject to the axially outer power of disturbing left, the left pole ring 3 of rotor and the right pole ring 13 of rotor will depart from equilibrium position axial motion to the left, cause magnet ring 15 between stator magnet polar ring A4 right side and the left pole ring of rotor 3 left sides, between stator magnet polar ring B7 left side and the left pole ring of rotor 3 right sides, between the right pole ring of stator magnet polar ring C9 right side and rotor 13 left sides, the magnetic flux of the bias magnetic field producing in the air gap between stator magnet polar ring D12 left side and the right pole ring of rotor 13 right sides changes, be between the left pole ring of stator magnet polar ring A4 right side and rotor 3 left sides and stator magnet polar ring C9 right side and the right pole ring of rotor 13 left sides between air gap reduce, the magnetic flux of the air gap bias magnetic field between between the left pole ring of stator magnet polar ring A4 right side and rotor 3 left sides and stator magnet polar ring C9 right side and the right pole ring of rotor 13 left sides increases.Air gap between stator magnet polar ring B7 left side and the left pole ring of rotor 3 right sides and between stator magnet polar ring D12 left side and the right pole ring of rotor 13 right sides increases, and the magnetic flux of the air gap bias magnetic field between stator magnet polar ring B7 left side and the left pole ring of rotor 3 right sides and between stator magnet polar ring D12 left side and the right pole ring of rotor 13 right sides reduces.
Due to square being directly proportional of magnetic field suction when magnetic pole area is certain and magnetic field magnetic flux, therefore magnetic bearing rotor assembly suction is left greater than suction to the right, at left control winding 6 and right control winding 11, do not pass into before electric current, the left pole ring 3 of rotor and the right pole ring 13 of rotor cannot be got back to equilibrium position.Now the displacement transducer in magnetic bearing control system detects the left pole ring 3 of rotor and the right pole ring 13 of rotor departs from the displacement amount of its reference position, center, controller is transformed into control current signal by this displacement signal, control the electric current that left control winding 6 is flowed through, in air gap between stator magnet polar ring A4 right side and the left pole ring of rotor 3 left sides and between stator magnet polar ring B7 left side and the left pole ring of rotor 3 right sides, set up a controlling magnetic field, and superpose with bias magnetic field, the magnetic flux of air-gap field between the left pole ring of stator magnet polar ring A4 right side and rotor 3 left sides is reduced, in air gap between stator magnet polar ring B7 left side and the left pole ring of rotor 3 right sides, the magnetic flux in magnetic field increases.
Also in right control winding 11, produce and control electric current simultaneously, in air gap between stator magnet polar ring C9 right side and the right pole ring of rotor 13 left sides and between stator magnet polar ring D12 left side and the right pole ring of rotor 13 right sides, set up a controlling magnetic field, and superpose with bias magnetic field, the magnetic flux of air-gap field between the right pole ring of stator magnet polar ring C9 right side and rotor 13 left sides is reduced, the magnetic flux in the magnetic field in the air gap between stator magnet polar ring D12 left side and the right pole ring of rotor 13 right sides increases, finally reach transient equiliblium, the left pole ring 3 of rotor and the right pole ring 13 of rotor are retracted to equilibrium position.In like manner, if the left pole ring 3 of rotor and the right pole ring 13 of rotor are subject to outer disturbance to the right, with the degenerative permanent magnet biased axial magnetic suspension bearing in position, by controller, control the electric current in left control winding 6 and right control winding 11, regulate the size of each air-gap flux, can keep all the time the left pole ring 3 of rotor and the right pole ring 13 of rotor at equilibrium position stable suspersion.
Claims (5)
1. permanent magnet biased axial magnetic suspension bearing, is characterized in that comprising:
Stator magnetic conduction bridged ring (8), its left and right sides arranges respectively stator left sleeve (5) and the right sleeve of stator (10), the left and right, inner side of stator left sleeve (5) arranges respectively stator magnet polar ring A(4) and stator magnet polar ring B(7), the left and right, inner side of the right sleeve of stator (10) arranges respectively stator magnet polar ring C(9) and stator magnet polar ring D(12);
Be sleeved on the magnet ring (15) on main shaft (1), its left and right sides arranges respectively the left magnetic guiding loop of rotor (2) and the right magnetic guiding loop of rotor (14) being sleeved on main shaft (1), in the left side of the left magnetic guiding loop of rotor (2) and the right side of the right magnetic guiding loop of rotor (14), the left pole ring of rotor (3) and the right pole ring of rotor (13) being sleeved on main shaft (1) is set respectively;
Left control winding (6) is arranged on by stator left sleeve (5), stator magnet polar ring A(4), stator magnet polar ring B(7) and the intracavity space that surrounds of the left pole ring of rotor (3) in;
Right control winding (11) is arranged on by the right sleeve of stator (10), stator magnet polar ring C(9), stator magnet polar ring D(12) and the right pole ring of rotor (13) surround in another intracavity space.
2. the permanent magnet biased axial magnetic suspension bearing as described in right 1, it is characterized in that the left pole ring of rotor (3) is identical with the shape of the right pole ring of rotor (13), the left magnetic guiding loop of rotor (2) is identical with the shape of the right magnetic guiding loop of rotor (14), stator left sleeve (5) is identical with the shape of the right sleeve of stator (10), stator magnet polar ring A(4), stator magnet polar ring B(7), stator magnet polar ring C(9) with stator magnet polar ring D(12) shape identical.
3. the permanent magnet biased axial magnetic suspension bearing as described in right 1 or 2, it is characterized in that stator magnet polar ring A(4) inner side and main shaft (1) between, stator magnet polar ring A(4) between right side and the left pole ring of rotor (3) left side, between left control winding (6) and the left pole ring of rotor (3) outside, stator magnet polar ring B(7) between inner side and the left magnetic guiding loop of rotor (2) outside, stator magnet polar ring B(7) between left side and the left pole ring of rotor (3) right side, stator magnet polar ring D(12) between inner side and main shaft (1), stator magnet polar ring D(12) between left side and the right pole ring of rotor (13) right side, between right control winding (11) and the right pole ring of rotor (13) outside, stator magnet polar ring C(9) between inner side and the right magnetic guiding loop of rotor (14) outside, stator magnet polar ring C(9) between right side and the right pole ring of rotor (13) left side, all there is air gap.
4. the permanent magnet biased axial magnetic suspension bearing as described in right 3, stator magnet polar ring A(4) between right side and the left pole ring of rotor (3) left side, stator magnet polar ring B(7) between left side and the left pole ring of rotor (3) right side, stator magnet polar ring D(12) between between left side and the right pole ring of rotor (13) right side, stator magnet polar ring C(9) on the left of right side and the right pole ring of rotor (13), width of air gap is 0.2～1.2mm.
5. the permanent magnet biased axial magnetic suspension bearing as described in right 3, stator magnet polar ring A(4) between inner side and main shaft (1), between left control winding (6) and the left pole ring of rotor (3) outside, stator magnet polar ring B(7) between inner side and the left magnetic guiding loop of rotor (2) outside, stator magnet polar ring D(12) between inner side and main shaft (1), between right control winding (11) and the right pole ring of rotor (13) outside, stator magnet polar ring C(9) width of air gap between outside inner side and the right magnetic guiding loop of rotor (14) is 2～5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320354466.2U CN203463494U (en) | 2013-06-19 | 2013-06-19 | Permanent-magnet biased axial magnetic suspension bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320354466.2U CN203463494U (en) | 2013-06-19 | 2013-06-19 | Permanent-magnet biased axial magnetic suspension bearing |
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| Publication Number | Publication Date |
|---|---|
| CN203463494U true CN203463494U (en) | 2014-03-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320354466.2U Expired - Fee Related CN203463494U (en) | 2013-06-19 | 2013-06-19 | Permanent-magnet biased axial magnetic suspension bearing |
Country Status (1)
| Country | Link |
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| CN (1) | CN203463494U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104609128A (en) * | 2014-12-09 | 2015-05-13 | 马宁 | Auxiliary roller for conveying belt |
| CN106369052A (en) * | 2016-10-24 | 2017-02-01 | 珠海格力节能环保制冷技术研究中心有限公司 | Magnetic bearing |
| CN108953376A (en) * | 2018-06-26 | 2018-12-07 | 南京邮电大学 | A kind of semi-freedom mixed type axial magnetic bearing of permanent magnet on rotor |
| CN111434941A (en) * | 2019-01-14 | 2020-07-21 | 坎德拉（深圳）科技创新有限公司 | Hybrid radial magnetic bearing |
| CN112065855A (en) * | 2020-09-17 | 2020-12-11 | 淮阴工学院 | Four-pole double-stator hybrid magnetic bearing controlled by external winding |
| CN113323963A (en) * | 2021-04-22 | 2021-08-31 | 东南大学 | Magnetic bearing of stator permanent magnet motor with magnetic pole bypass and bias force adjusting method thereof |
| CN114922906A (en) * | 2022-06-08 | 2022-08-19 | 珠海格力电器股份有限公司 | Spliced stator structure and axial magnetic suspension bearing |
-
2013
- 2013-06-19 CN CN201320354466.2U patent/CN203463494U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104609128A (en) * | 2014-12-09 | 2015-05-13 | 马宁 | Auxiliary roller for conveying belt |
| CN106369052A (en) * | 2016-10-24 | 2017-02-01 | 珠海格力节能环保制冷技术研究中心有限公司 | Magnetic bearing |
| CN108953376A (en) * | 2018-06-26 | 2018-12-07 | 南京邮电大学 | A kind of semi-freedom mixed type axial magnetic bearing of permanent magnet on rotor |
| CN111434941A (en) * | 2019-01-14 | 2020-07-21 | 坎德拉（深圳）科技创新有限公司 | Hybrid radial magnetic bearing |
| CN112065855A (en) * | 2020-09-17 | 2020-12-11 | 淮阴工学院 | Four-pole double-stator hybrid magnetic bearing controlled by external winding |
| CN112065855B (en) * | 2020-09-17 | 2022-01-28 | 淮阴工学院 | Four-pole double-stator hybrid magnetic bearing controlled by external winding |
| CN113323963A (en) * | 2021-04-22 | 2021-08-31 | 东南大学 | Magnetic bearing of stator permanent magnet motor with magnetic pole bypass and bias force adjusting method thereof |
| US11536315B2 (en) | 2021-04-22 | 2022-12-27 | Southeast University | Magnetic bearing of stator permanent magnet motor with magnetic pole bypasses and bias force adjusting method thereof |
| CN114922906A (en) * | 2022-06-08 | 2022-08-19 | 珠海格力电器股份有限公司 | Spliced stator structure and axial magnetic suspension bearing |
| CN114922906B (en) * | 2022-06-08 | 2023-09-15 | 珠海格力电器股份有限公司 | Spliced stator structure and axial magnetic suspension bearing |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140305 Termination date: 20140619 |
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| EXPY | Termination of patent right or utility model |