CN109826867A - A kind of hybrid magnetic suspension bearing system and generator - Google Patents
A kind of hybrid magnetic suspension bearing system and generator Download PDFInfo
- Publication number
- CN109826867A CN109826867A CN201910127154.XA CN201910127154A CN109826867A CN 109826867 A CN109826867 A CN 109826867A CN 201910127154 A CN201910127154 A CN 201910127154A CN 109826867 A CN109826867 A CN 109826867A
- Authority
- CN
- China
- Prior art keywords
- magnetic suspension
- suspension bearing
- bearing
- generator
- permanent magnet
- 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
Landscapes
- Magnetic Bearings And Hydrostatic Bearings (AREA)
- Wind Motors (AREA)
Abstract
The invention discloses one kind to be used for generator hybrid magnetic suspension bearing system, including hybrid magnetic suspension bearing, permanent magnet and electromagnet are provided in hybrid magnetic suspension bearing, permanent magnet and electromagnet cooperatively form bearing magnetic loop, permanent magnet can provide permanent magnetism magnetomotive force for the magnetic loop of hybrid magnetic suspension bearing, and the magnetic field that permanent magnet generates provides suspending power for the rotor portion of generator.Hybrid magnetic suspension bearing system of the invention can eliminate the friction and wear between rotatable parts and fixation member, reduce the minimum wind speed of starting of wind-driven generator, significantly improve the service life and reliability of mainshaft bearing of wind-driven generator, because the maintenance cost of mainshaft bearing of wind-driven generator is very high, thus main shaft bearing service life is improved with significant economic benefit.
Description
Technical field
The invention belongs to magnetic levitation bearing system technical field more particularly to a kind of hybrid magnetic suspension axis for generator
Hold system.
Background technique
Wind-driven generator is to convert wind energy into mechanical work and rotor is driven to rotate, and the electric power of final output alternating current is set
It is standby.Wind-driven generator can be divided into double-fed and direct-driving type two types.Compared to double feed wind power generator, direct-driving type wind-force
Motor is directly connected to drive by generator with impeller, eliminates the legacy devices such as gear-box.Direct-driving type wind power generation machine makes
The gearbox designs in double feed wind power generator system are omitted with the advantage for directly driving energy, reduce generator drive gear
The quantity of component, reduces the rate of wear.Since gear-box is the portion easily overloaded in MW class wind turbine with premature breakdown
Part, therefore the direct-drive type wind motor of gear-box in low wind speeds does not have high efficiency, low noise, high life, unit body
The plurality of advantages such as product is small, operation expense is low.
The special bearing of direct-driving type wind power generation machine is divided into three classes, including main shaft bearing, yaw bearing and pitch variable bearings.Mesh
Before, three kinds of bearings use mechanical bearing, and the structure type of bearing mainly has four-point contact ball, crossed roller bearing, circle
Column roller bearing, self-aligning roller bearing, deep groove ball bearing etc..Wind-driven generator requires bearing to have good sealing performance and lubrication
Performance, impact resistance, long-life and high reliability, generator will start in force one wind, and can track wind vector, so axis
Bearing structure needs to carry out special designing to guarantee low friction, high sensitivity.
However, direct-driving type wind power generation machine works in field throughout the year, working condition is more severe, temperature, humidity and bearing
Load change is very big, and with shock loading, in the special bearing of wind-driven generator, main shaft bearing is held due to continuous operation
It is big to carry range, thus is easy to happen damage.The bearing of wind-driven generator damages frequent occurrence, becomes restriction wind-driven generator
One of bottleneck of reliability.
Therefore, in the special bearing of wind-driven generator, the service life of main shaft bearing is lower, every just to need replacing within several years
Once, the maintenance cost of bearing is very high, and the service life for improving main shaft bearing helps to improve the reliability of wind-driven generator.
For example, 1.5MW grades of direct-driving type wind power generation mainshaft bearings use mechanical bearing, the rotatable parts of mechanical bearing and fixation at present
Load is transmitted by the contact force of rolling element between component.Since the fluctuation of wind load is very big, the load change of Bearing inner
Acutely, bearing is easy to appear plastic deformation and fatigue damage and fails, and influences the normal operation of equipment.
Summary of the invention
To solve above-mentioned the problems of the prior art, the present invention provides a kind of hybrid magnetic suspension bearing systems, to replace
Main shaft bearing of the mechanical bearing as generator improves the main shaft bearing service life and generator whole aircraft reliability of generator.
To achieve the above object, the specific technical solution of hybrid magnetic suspension bearing system of the invention is as follows:
A kind of hybrid magnetic suspension bearing system, is used for generator, including hybrid magnetic suspension bearing, in hybrid magnetic suspension bearing
It is provided with permanent magnet and electromagnet, permanent magnet and electromagnet cooperatively form bearing magnetic loop.Permanent magnet can mention for entire magnetic loop
For permanent magnetism magnetomotive force, and magnetic field is generated at air gap.When electromagnet is not powered on, the magnetic field that permanent magnet generates can be wind-power electricity generation
The rotor portion of machine provides partial suspended power.
Further, the magnetic suspension bearing includes radial magnetic bearing and axial magnetic suspension bearing, axial magnetic axis
It holds and supports generator shaft jointly with axial magnetic suspension bearing.
Further, permanent magnet is arranged in the stationary part of hybrid magnetic suspension bearing.
Further, the stationary part of hybrid magnetic suspension bearing includes the first stator block and the second stator block, permanent magnet setting
Between the first stator block and the second stator block, the electromagnetic coil setting of electromagnet is on the first stator block and the/the second stator block.
Further, the generator further includes sensor, controller and power amplifier, and sensor turns generator
The position signal of son inputs to controller, and controller calculates the current value of electromagnet according to control algolithm and exports to power amplification
Device, power amplifier export electric current to the electromagnetic coil of electromagnet, with the electromagnetic force size of regulating magnet, to pass through feedback
Electric current in the real-time regulating magnet of control mode.
Further, the maximum magnetic induction that electromagnet can be provided is not less than the maximum magnetic strength that permanent magnet is capable of providing
Answer intensity.
Further, the maximum electricity needed when electromagnet and permanent magnet can produce maximum electromagnetic force greater than magnetic suspension bearing floating
Magnetic force, and electromagnet and the producible maximum electromagnetic force of permanent magnet are disturbed greater than the rotor of wind-driven generator from heavy load and maximum
The summation of dynamic loading protects the gap between bearing and wind power generator rotor to be less than the air gap of magnetic suspension bearing.
Further, hybrid magnetic suspension bearing system further includes protection bearing, and protection bearing is mechanical bearing, and protection bearing is set
It sets at the both ends of generator shaft, to limit the maximum radial and axial displacement of generator amature part.
A kind of generator, the generator include above-mentioned hybrid magnetic suspension bearing system.
Further, the generator is high-power wind-driven generator.
Compared to the mechanical bearing of 1.5MW grades of direct wind-driven generators, hybrid magnetic suspension bearing system energy of the invention
The friction and wear between rotatable parts and fixation member is enough eliminated, the minimum wind speed of starting of wind-driven generator is reduced, significantly mentions
The service life and reliability of high mainshaft bearing of wind-driven generator, because the maintenance cost of mainshaft bearing of wind-driven generator is very high,
Thus improving main shaft bearing service life has significant economic benefit.
Detailed description of the invention
Fig. 1 is the structural schematic diagram using the direct-driving type wind power generation machine of hybrid magnetic suspension bearing system of the invention；
Fig. 2 is the magnetic circuit schematic diagram in hybrid magnetic suspension bearing system of the present invention.
Specific embodiment
In order to be best understood from the purpose of the present invention, structure and function, with reference to the accompanying drawing, to mixing magnetcisuspension of the invention
Floating bearing arrangement does further detailed description.
As shown in Figure 1, hybrid magnetic suspension bearing system of the invention is applied in generator, especially direct-driving type wind-force is sent out
Motor improves the reliability of bearing of wind power generator to substitute conventional mechanical bearings.It is described applied to wind-driven generator
Hybrid magnetic suspension bearing system includes magnetic suspension bearing, generator, sensor, controller and power amplifier.
Above-mentioned magnetic suspension bearing is hybrid magnetic suspension bearing, is provided with permanent magnet and electromagnet in hybrid magnetic suspension bearing,
Namely the magnetic loop in hybrid magnetic suspension bearing includes permanent magnet and electromagnet, permanent magnet and electromagnet mating reaction form bearing
Magnetic loop.
Above-mentioned magnetic suspension bearing includes radial magnetic bearing 20 and axial magnetic suspension bearing 10, radial magnetic bearing 20
Generator shaft 40 is supported with axial magnetic suspension bearing 10.
As a result, in hybrid magnetic suspension bearing, permanent magnet can provide permanent magnet bias magnetomotive force, sensor for bearing magnetic loop
The position signal of generator amature is inputed into controller, controller calculates current value and the output of electromagnet according to control algolithm
To power amplifier, power amplifier exports electric current to the electromagnetic force size of electromagnetic coil regulating magnet, to pass through feedback
Electric current in the real-time regulating magnet of control mode.In the case where same bearing capacity, in radial magnetic bearing 20 and axially
The electric current in permanent magnetism physical efficiency reduction electromagnet is added in magnetic suspension bearing 10, reduces copper loss and iron loss, so that it is mixed to reduce generator
Close the system energy consumption of magnetic levitation bearing system.
As shown in Fig. 2, showing hybrid magnetic suspension bearing in radial magnetic bearing 20 and axial magnetic suspension bearing 10
In bearing magnetic loop, the stationary part 11 in radial magnetic bearing 20 and axial magnetic suspension bearing 10 is (with axial magnetic suspension
Illustrate for bearing) in be provided with permanent magnet, permanent magnet can provide permanent magnetism magnetomotive force for entire magnetic loop, and at air gap generate
Magnetic field.For example, the stationary part 11 of hybrid magnetic suspension bearing includes the first stator block and the second stator block, permanent magnet setting is the
Between one stator block and the second stator block, in Fig. 2, Aa=AfeFor magnetic pole area, i is coil current, and n is coil turn, and s is gas
Gap length, lfeThe length for being magnetic loop in stationary part and rotor portion.The rotor portions of stationary part 11 and magnetic suspension bearing
12 are divided to be oppositely arranged, magnet spool setting is on the first stator block and the/the second stator block.
When electromagnet is not powered on, the magnetic field that permanent magnet generates can provide partial suspended for the rotor portion of wind-driven generator
Power.The electrical current of solenoid part can be reduced when hybrid magnetic suspension bearing is run compared to active magnetic suspension bearing, from
And reduce the energy consumption of magnetic levitation bearing system.
Preferably, the maximum magnetic induction that electromagnet can be provided is not less than the maximum magnetic strength that permanent magnet is capable of providing
Intensity is answered, the rotor portion of magnetic suspension bearing can be prevented to be sucked by permanent magnet in this way.What electromagnet and permanent magnet can be provided
Maximum electromagnetic force (magnetic force summation maximum value) is greater than the maximum electromagnetic force needed when magnetic suspension bearing floating, to guarantee to mix
Magnetic suspension bearing floating, and the maximum electromagnetic force that electromagnet and permanent magnet can be provided should be greater than the rotor of wind-driven generator certainly
Heavy load and maximum perturbation load, such as the maximum electromagnetic force that can be provided of electromagnet and permanent magnet are the rotor of wind-driven generator
From 1.2 times of heavy load and maximum perturbation load summation maximum value, to reserve sufficient regulatable magnetic force range for electromagnet.
Hybrid magnetic suspension bearing system further includes protection bearing 50, and protection bearing 50 is mechanical bearing, and protection bearing 50 is set
It sets at the both ends of generator shaft 40, for limiting the maximum radial and axial displacement of wind power generator rotor part, prevents magnetic
Suspension bearing and generator amature part are touched with generator unit stator part 30 rubs and damages, and protects bearing 50 and wind-power electricity generation
Gap between machine rotor is less than the air gap of magnetic suspension bearing.
Hybrid magnetic suspension bearing system of the invention is particularly suitable for powerful wind-driven generator, the hybrid magnetic suspension axis
It holds the magnetic suspension bearing in system and belongs to heavily loaded magnetic suspension bearing, such as 1.5MW grades or more of large-scale direct-driving type wind power generation machine,
The quality of generator amature part is about 45 tons.Compared to Active Magnetic Suspending Bearing, hybrid magnetic suspension bearing system of the invention
Energy consumption is lower, and compared to passive magnetic suspension bearing, hybrid magnetic suspension bearing of the invention is capable of the electromagnetism of active regulating magnet
Power size is more suitable for the operating condition of varying load, such as uses suitable for the occasion of wind-driven generator wind load frequent changes.
It is appreciated that the present invention is described by some embodiments, and what those skilled in the art knew, it is not taking off
In the case where from the spirit and scope of the present invention, various changes or equivalence replacement can be carried out to these features and embodiment.Separately
Outside, under the teachings of the present invention, can modify to these features and embodiment with adapt to particular situation and material without
The spirit and scope of the present invention can be detached from.Therefore, the present invention is not limited to the particular embodiment disclosed, and is fallen with
Embodiment within the scope of claims hereof belong to the present invention protect in the range of.
Claims (10)
1. a kind of hybrid magnetic suspension bearing system is used for generator, which is characterized in that including hybrid magnetic suspension bearing, mix magnetic
Permanent magnet and electromagnet are provided in suspension bearing, permanent magnet and electromagnet cooperatively form bearing magnetic loop, and permanent magnet can be mixed
The magnetic loop for closing magnetic suspension bearing provides permanent magnetism magnetomotive force, and the magnetic field that permanent magnet generates provides suspension for the rotor portion of generator
Power.
2. hybrid magnetic suspension bearing system according to claim 1, which is characterized in that the magnetic suspension bearing includes radial
Magnetic suspension bearing and axial magnetic suspension bearing, radial magnetic bearing and axial magnetic suspension bearing support generator shaft jointly.
3. hybrid magnetic suspension bearing system according to claim 1, which is characterized in that permanent magnet is arranged in hybrid magnetic suspension
In the stationary part of bearing.
4. hybrid magnetic suspension bearing system according to claim 3, which is characterized in that the stator department of hybrid magnetic suspension bearing
Dividing includes the first stator block and the second stator block, and permanent magnet is arranged between the first stator block and the second stator block, electromagnet
Electromagnetic coil is arranged on the first stator block and/or the second stator block.
5. hybrid magnetic suspension bearing system according to claim 1 or 2, which is characterized in that the generator further includes passing
The position signal of generator amature part is inputed to controller, controller by sensor, controller and power amplifier, sensor
Calculate electromagnet current value simultaneously export to power amplifier, power amplifier export electric current to electromagnet electromagnetic coil to adjust
The electromagnetic force size of economize on electricity magnet, thus the electric current in regulating magnet.
6. hybrid magnetic suspension bearing system according to claim 1, which is characterized in that the maximum magnetic induction that electromagnet generates
Intensity is greater than the maximum magnetic induction that permanent magnet generates.
7. hybrid magnetic suspension bearing system according to claim 1, which is characterized in that electromagnet and permanent magnet generate jointly
Maximum electromagnetic force be greater than the rotor of wind-driven generator from heavy load and maximum perturbation load the sum of.
8. hybrid magnetic suspension bearing system according to claim 5, which is characterized in that hybrid magnetic suspension bearing system is also wrapped
Protection bearing is included, the both ends of generator shaft are arranged in protection bearing, to limit the maximum radial and axis of generator amature part
To displacement.
9. a kind of generator, which is characterized in that the generator includes hybrid magnetic suspension of any of claims 1-8
Bearing arrangement.
10. hybrid magnetic suspension bearing system according to claim 9, which is characterized in that the generator is wind-power electricity generation
Machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910127154.XA CN109826867A (en) | 2019-02-20 | 2019-02-20 | A kind of hybrid magnetic suspension bearing system and generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910127154.XA CN109826867A (en) | 2019-02-20 | 2019-02-20 | A kind of hybrid magnetic suspension bearing system and generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109826867A true CN109826867A (en) | 2019-05-31 |
Family
ID=66863910
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910127154.XA Pending CN109826867A (en) | 2019-02-20 | 2019-02-20 | A kind of hybrid magnetic suspension bearing system and generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109826867A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112177868A (en) * | 2019-07-01 | 2021-01-05 | 中国航天科工飞航技术研究院（中国航天海鹰机电技术研究院） | Self-aligning magnetic suspension bearing system and generator |
| CN112653307A (en) * | 2019-10-10 | 2021-04-13 | 中国航天科工飞航技术研究院（中国航天海鹰机电技术研究院） | Double-layer direct-drive wind driven generator |
| CN113969831A (en) * | 2021-11-04 | 2022-01-25 | 上海柯来浦能源科技有限公司 | Magnetic suspension type small impact engine |
| CN114941653A (en) * | 2022-06-10 | 2022-08-26 | 珠海格力电器股份有限公司 | Control method and device for magnetic suspension bearing, magnetic bearing system and storage medium |
| WO2023116228A1 (en) * | 2021-12-21 | 2023-06-29 | 苏州苏磁智能科技有限公司 | Magnetic levitation device and rotor position adjustment method |
| CN118622846A (en) * | 2024-07-04 | 2024-09-10 | 山东华东风机有限公司 | A hybrid magnetic bearing structure with large axial load capacity and a design method thereof |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000170766A (en) * | 1998-12-01 | 2000-06-20 | Seiko Seiki Co Ltd | Generator set utilizing magnetic bearing |
| CN2597738Y (en) * | 2002-12-11 | 2004-01-07 | 中国科学院电工研究所 | Hybrid Magnetic Bearing |
| WO2007101402A1 (en) * | 2006-03-06 | 2007-09-13 | Guangzhou Zhongke Hengyuan Energy Technology Co., Ltd | A wind driven generator using magnetic suspension |
| US20100127589A1 (en) * | 2007-04-25 | 2010-05-27 | Siemens Aktiengesellschaft | Bearing device having a shaft which is mounted magnetically such that it can rotate about an axis with respect to a stator, and having a damping apparatus |
| CN101915214A (en) * | 2010-07-22 | 2010-12-15 | 南京工业大学 | Five-degree-of-freedom fully-suspended vertical-axis wind turbine with external rotor structure |
| CN102437675A (en) * | 2011-10-13 | 2012-05-02 | 山东科技大学 | Magnetic levitation flywheel energy storage device |
| CN103929010A (en) * | 2014-03-25 | 2014-07-16 | 中国人民解放军海军工程大学 | A vertical hybrid magnetic levitation flywheel energy storage system |
| CN104533945A (en) * | 2015-01-05 | 2015-04-22 | 山东大学 | Structure for achieving five-freedom-degree suspension of rotor through axial mixed magnetic bearings |
| CN204371939U (en) * | 2015-01-05 | 2015-06-03 | 山东大学 | One realizes rotor five-degree magnetic suspension structure by axial mixed magnetic bearing |
| CN105257698A (en) * | 2014-07-14 | 2016-01-20 | 张玉宝 | Single-degree-of-freedom magnetic-levitation rotor supporting system and magnetic centering bearing |
| CN106402157A (en) * | 2016-11-16 | 2017-02-15 | 常州工学院 | Magnetic suspension bearing control system capable of realizing resuspension after destabilization and control method thereof |
| CN210484404U (en) * | 2019-02-20 | 2020-05-08 | 中国航天科工飞航技术研究院（中国航天海鹰机电技术研究院） | Hybrid magnetic suspension bearing system and generator |
-
2019
- 2019-02-20 CN CN201910127154.XA patent/CN109826867A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000170766A (en) * | 1998-12-01 | 2000-06-20 | Seiko Seiki Co Ltd | Generator set utilizing magnetic bearing |
| CN2597738Y (en) * | 2002-12-11 | 2004-01-07 | 中国科学院电工研究所 | Hybrid Magnetic Bearing |
| WO2007101402A1 (en) * | 2006-03-06 | 2007-09-13 | Guangzhou Zhongke Hengyuan Energy Technology Co., Ltd | A wind driven generator using magnetic suspension |
| US20100127589A1 (en) * | 2007-04-25 | 2010-05-27 | Siemens Aktiengesellschaft | Bearing device having a shaft which is mounted magnetically such that it can rotate about an axis with respect to a stator, and having a damping apparatus |
| CN101915214A (en) * | 2010-07-22 | 2010-12-15 | 南京工业大学 | Five-degree-of-freedom fully-suspended vertical-axis wind turbine with external rotor structure |
| CN102437675A (en) * | 2011-10-13 | 2012-05-02 | 山东科技大学 | Magnetic levitation flywheel energy storage device |
| CN103929010A (en) * | 2014-03-25 | 2014-07-16 | 中国人民解放军海军工程大学 | A vertical hybrid magnetic levitation flywheel energy storage system |
| CN105257698A (en) * | 2014-07-14 | 2016-01-20 | 张玉宝 | Single-degree-of-freedom magnetic-levitation rotor supporting system and magnetic centering bearing |
| CN104533945A (en) * | 2015-01-05 | 2015-04-22 | 山东大学 | Structure for achieving five-freedom-degree suspension of rotor through axial mixed magnetic bearings |
| CN204371939U (en) * | 2015-01-05 | 2015-06-03 | 山东大学 | One realizes rotor five-degree magnetic suspension structure by axial mixed magnetic bearing |
| CN106402157A (en) * | 2016-11-16 | 2017-02-15 | 常州工学院 | Magnetic suspension bearing control system capable of realizing resuspension after destabilization and control method thereof |
| CN210484404U (en) * | 2019-02-20 | 2020-05-08 | 中国航天科工飞航技术研究院（中国航天海鹰机电技术研究院） | Hybrid magnetic suspension bearing system and generator |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112177868A (en) * | 2019-07-01 | 2021-01-05 | 中国航天科工飞航技术研究院（中国航天海鹰机电技术研究院） | Self-aligning magnetic suspension bearing system and generator |
| CN112177868B (en) * | 2019-07-01 | 2022-04-12 | 中国航天科工飞航技术研究院（中国航天海鹰机电技术研究院） | Self-aligning magnetic suspension bearing system and generator |
| CN112653307A (en) * | 2019-10-10 | 2021-04-13 | 中国航天科工飞航技术研究院（中国航天海鹰机电技术研究院） | Double-layer direct-drive wind driven generator |
| CN113969831A (en) * | 2021-11-04 | 2022-01-25 | 上海柯来浦能源科技有限公司 | Magnetic suspension type small impact engine |
| WO2023116228A1 (en) * | 2021-12-21 | 2023-06-29 | 苏州苏磁智能科技有限公司 | Magnetic levitation device and rotor position adjustment method |
| KR20240105472A (en) * | 2021-12-21 | 2024-07-05 | 슈저우 슈퍼맥 인텔리전트 테크놀로지 컴퍼니 리미티드 | Magnetic levitation device and rotor positioning method |
| KR102839090B1 (en) | 2021-12-21 | 2025-07-25 | 슈저우 슈퍼맥 인텔리전트 테크놀로지 컴퍼니 리미티드 | Magnetic levitation device and method for adjusting rotor position |
| CN114941653A (en) * | 2022-06-10 | 2022-08-26 | 珠海格力电器股份有限公司 | Control method and device for magnetic suspension bearing, magnetic bearing system and storage medium |
| CN118622846A (en) * | 2024-07-04 | 2024-09-10 | 山东华东风机有限公司 | A hybrid magnetic bearing structure with large axial load capacity and a design method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109826867A (en) | A kind of hybrid magnetic suspension bearing system and generator | |
| US7944074B2 (en) | Wind turbine direct drive airgap control method and system | |
| CN102437675A (en) | Magnetic levitation flywheel energy storage device | |
| CN201730962U (en) | Five-degree-of-freedom permanent magnet biased magnetic bearing | |
| CN111102234A (en) | A permanent magnet biased magnetic suspension bearing | |
| CN109026999A (en) | Axial magnetic suspension bearing | |
| CN101806323A (en) | Five degree-of-freedom permanent magnet biased magnetic bearing | |
| CN108869543A (en) | A kind of hybrid superconducting magnetic bearing system of flywheel energy storage | |
| CN112713738A (en) | Magnetic suspension switched reluctance motor, carrying type flywheel battery, vehicle-mounted air compressor and satellite attitude control platform | |
| CN201122867Y (en) | A high-speed magnetic levitation bearingless permanent magnet motor | |
| CA2310191A1 (en) | Mounting of rotors of generators in a magnetic field | |
| CN105408649B (en) | Reducing stress on bearings in an electric machine | |
| CN210484404U (en) | Hybrid magnetic suspension bearing system and generator | |
| CN101834552A (en) | Permanent magnet synchronous traction system of trunk high-speed vehicle | |
| CN210799741U (en) | Self-aligning magnetic suspension bearing system and generator | |
| CN111332488B (en) | Electromagnetic ejection system | |
| CN114046337A (en) | Vertical hybrid magnetic suspension flywheel energy storage device | |
| RU2540696C1 (en) | High-rate electrical machine with vertical shaft | |
| CN111255806A (en) | Ultra-high-speed bearing with driving function and driving method thereof | |
| CN217036954U (en) | High-speed motor supported by magnetic suspension bearing | |
| CN210839213U (en) | Double-layer direct-drive wind driven generator | |
| CN201255072Y (en) | Mixed magnetic floating and bearing device for hydroelectric generating set rotating part | |
| CN110017329A (en) | A kind of E type structure electromagnetic type radial direction magnetic bearing | |
| CN102820834A (en) | Magnetic levitation generator | |
| CN222276854U (en) | Magnetic suspension bearing supporting system of vertical axis wind turbine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190531 |