CN111162629B - Method for arranging stator and rotor of magnetic suspension motor - Google Patents
Method for arranging stator and rotor of magnetic suspension motor Download PDFInfo
- Publication number
- CN111162629B CN111162629B CN202010053685.1A CN202010053685A CN111162629B CN 111162629 B CN111162629 B CN 111162629B CN 202010053685 A CN202010053685 A CN 202010053685A CN 111162629 B CN111162629 B CN 111162629B
- Authority
- CN
- China
- Prior art keywords
- magnetic
- rotor
- rotating shaft
- stator core
- axial thrust
- 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.)
- Active
Links
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/003—Couplings; Details of shafts
-
- 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
-
- 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
- H02K1/22—Rotating parts of the magnetic circuit
-
- 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
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/08—Structural association with bearings
- H02K7/09—Structural association with bearings with magnetic bearings
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Magnetic Bearings And Hydrostatic Bearings (AREA)
Abstract
The invention provides a method for arranging a stator and a rotor of a magnetic suspension motor.A front radial magnetic bearing, a stator core, a rear radial magnetic bearing and an axial thrust magnetic bearing are sequentially arranged on a rotating shaft from front to back; the rotating shaft is provided with an axial thrust disc which is arranged in the axial thrust magnetic bearing; magnetic steel is arranged at the position of the rotating shaft opposite to the stator core; the shaft is provided with a rotor axial offset with respect to the stator core. The invention relates to a method for arranging a stator and a rotor of a magnetic suspension motor, which is characterized in that the rotor is axially offset relative to a stator core by virtue of a rotating shaft, and the magnetic leakage at the end part is utilized to realize the action of the magnetic field tension so that the rotor axially generates a force opposite to the offset direction, thereby reducing the size of an axial thrust magnetic bearing, reducing the rotation resistance and the friction loss and improving the operation efficiency and the stability of the magnetic suspension motor.
Description
Technical Field
The invention belongs to the field of magnetic suspension motors, and particularly relates to a stator and rotor structure of a magnetic suspension motor.
Background
Under the condition of the prior art, the high-speed magnetic suspension bearing motor is more and more widely applied in the field of blowers and compressors, and the principle is that a rotor is suspended in the air by utilizing magnetic force, so that a stator and a rotor are not in mechanical contact, and the mechanical resistance of the motor during high-speed operation is greatly reduced. The magnetic suspension bearing is divided into a front radial bearing, a rear radial bearing and an axial thrust bearing according to the degree of freedom. Because the load of the high-speed magnetic suspension motor is an impeller generally, and axial force can be generated during rotation, in order to improve the suspension stability of the magnetic suspension motor, the requirement of a client on axial thrust is higher and higher, and a corresponding axial thrust bearing is designed to be larger and larger, so that the circular linear speed of a thrust disc can be close to or even exceed the sonic speed, and simultaneously, the magnetic density of the thrust disc can be saturated during design, so that higher rotation resistance and friction loss are generated, and the operation efficiency and the stability of the magnetic suspension motor are seriously influenced.
Disclosure of Invention
In view of the above, the present invention is directed to a method for arranging a stator and a rotor of a magnetic levitation motor, in which a rotor is axially offset with respect to a stator core by means of a rotating shaft, and a magnetic field is leaked by using an end portion to axially generate a force opposite to the offset direction by a tensile force of the magnetic field, so as to reduce the size of an axial thrust magnetic bearing, reduce the rotation resistance and the friction loss, and improve the operating efficiency and the stability of the magnetic levitation motor.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a method for arranging a stator and a rotor of a magnetic suspension motor is characterized in that a front radial magnetic bearing, a stator core, a rear radial magnetic bearing and an axial thrust magnetic bearing are sequentially arranged on a rotating shaft from front to back; the rotating shaft is provided with an axial thrust disc which is arranged in the axial thrust magnetic bearing; magnetic steel is arranged at the position of the rotating shaft opposite to the stator core; the shaft is provided with a rotor axial offset with respect to the stator core.
Furthermore, an end magnetic disc is arranged at the end part of the stator core.
Furthermore, the additional magnetic steel is arranged at the end part of the magnetic steel, and the magnetizing direction of the additional magnetic steel faces to the magnetic field direction of the magnetic steel.
Compared with the prior art, the method for arranging the stator and the rotor of the magnetic suspension motor has the following advantages:
the invention relates to a method for arranging a stator and a rotor of a magnetic suspension motor, which is characterized in that the rotor is axially offset relative to a stator core by virtue of a rotating shaft, and the magnetic leakage at the end part is utilized to realize the action of the magnetic field tension so that the rotor axially generates a force opposite to the offset direction, thereby reducing the size of an axial thrust magnetic bearing, reducing the rotation resistance and the friction loss and improving the operation efficiency and the stability of the magnetic suspension motor.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention.
In the drawings:
FIG. 1 is a schematic diagram of a method for arranging a stator and a rotor of a magnetic levitation motor according to an embodiment of the present invention;
fig. 2 is a second schematic diagram of a method for arranging a stator and a rotor of a magnetic levitation motor according to an embodiment of the present invention.
Description of reference numerals:
1-a stator core; 2-magnetic steel; 3-a rotating shaft; 4-a front radial magnetic bearing; 5-rotor axial offset; 6-rear radial magnetic bearing; 7-axial thrust magnetic bearing; 8-axial thrust disk; 9-end magnetic disc; 10-additional magnetic steel.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
As shown in fig. 1, a method for arranging a stator and a rotor of a magnetic suspension motor, a front radial magnetic bearing 4, a stator core 1, a rear radial magnetic bearing 6 and an axial thrust magnetic bearing 7 are sequentially arranged on a rotating shaft 3 from front to back; an axial thrust disc 8 is arranged on the rotating shaft 3, and the axial thrust disc 8 is arranged in the axial thrust magnetic bearing 7; the relative position of the rotating shaft 3 and the stator core 1 is provided with magnetic steel 2; the rotor shaft 3 is provided with a rotor axial offset 5 with respect to the stator core 1.
As shown in fig. 1, in the present embodiment, the rotating shaft 3 is provided with a rotor axial offset 5 with respect to the stator core 1, and the axial thrust disk 8 can be reduced in size by providing a certain axial tensile force by end leakage flux.
As shown in fig. 2, an end magnetic disc 9 is disposed at an end of the stator core 1, an additional magnetic steel 10 is disposed at an end of the magnetic steel 2, and a magnetizing direction of the additional magnetic steel 10 faces a magnetic field direction of the magnetic steel 2.
As shown in fig. 2, in this embodiment, the magnetizing direction of the additional magnetic steel 10 faces the magnetic field direction of the magnetic steel 2, so as to achieve the purpose of enhancing the magnetic field to improve the axial magnetic pull force; the end magnetic disc 9 is arranged to enhance the leakage magnetic field, thereby maximizing the utilization of the end leakage magnetic to generate axial tension.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (2)
1. A method for the stator-rotor arrangement of a magnetic levitation motor, characterized by: a front radial magnetic bearing (4), a stator core (1), a rear radial magnetic bearing (6) and an axial thrust magnetic bearing (7) are sequentially arranged on the rotating shaft (3) from front to back; an axial thrust disc (8) is arranged on the rotating shaft (3), and the axial thrust disc (8) is arranged in the axial thrust magnetic bearing (7); magnetic steel (2) is arranged at the position of the rotating shaft (3) opposite to the stator core (1); the rotating shaft (3) is provided with a rotor axial offset (5) relative to the stator core (1); the additional magnetic steel (10) is arranged at the end part of the magnetic steel (2), and the magnetizing direction of the additional magnetic steel (10) faces to the magnetic field direction of the magnetic steel (2).
2. A method for magnetic levitation motor stator and rotor arrangement as claimed in claim 1, characterised in that: an end magnetic disc (9) is arranged at the end part of the stator core (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010053685.1A CN111162629B (en) | 2020-01-17 | 2020-01-17 | Method for arranging stator and rotor of magnetic suspension motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010053685.1A CN111162629B (en) | 2020-01-17 | 2020-01-17 | Method for arranging stator and rotor of magnetic suspension motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111162629A CN111162629A (en) | 2020-05-15 |
| CN111162629B true CN111162629B (en) | 2021-09-21 |
Family
ID=70563785
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010053685.1A Active CN111162629B (en) | 2020-01-17 | 2020-01-17 | Method for arranging stator and rotor of magnetic suspension motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111162629B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114094750A (en) * | 2021-11-26 | 2022-02-25 | 南京埃斯顿自动化股份有限公司 | Bearing pre-tightening method for permanent magnet motor |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200980033Y (en) * | 2006-07-18 | 2007-11-21 | 沈阳工业大学 | A whole magnetic-suspension high-speed motor with permanent magnetic rotors |
| DE102012013265A1 (en) * | 2012-07-04 | 2014-01-09 | Liebherr-Aerospace Lindenberg Gmbh | Angular limited torque motor for actuating a hydraulic control valve in an aircraft |
| CN104836347A (en) * | 2015-05-28 | 2015-08-12 | 湖州越球电机有限公司 | Low-noise motor structure and denoising method |
| CN205583876U (en) * | 2016-04-25 | 2016-09-14 | 河南汉拿永磁科技有限公司 | Rotor of permanent magnet motor |
| CN107332389B (en) * | 2017-08-24 | 2021-09-14 | 莱克电气股份有限公司 | Blower motor and blower |
| CN209444603U (en) * | 2018-11-21 | 2019-09-27 | 珠海格力电器股份有限公司 | A kind of novel magnetically levitated compressor arrangement |
| CN209767311U (en) * | 2019-06-04 | 2019-12-10 | 天津飞旋科技有限公司 | Magnetic suspension motor |
-
2020
- 2020-01-17 CN CN202010053685.1A patent/CN111162629B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN111162629A (en) | 2020-05-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2418756B1 (en) | Permanent magnet rotating electric machine | |
| US7619332B2 (en) | Permanent magnet type electric rotating machine and wind turbine electric power generation system | |
| EP2536009A1 (en) | Magnetic levitation supporting structure for vertical shaft disc-type motor | |
| EP2592721A2 (en) | Permanent magnet electrical rotating machine, wind power generating system, and a method of magnetizing a permanent magnet | |
| KR101655161B1 (en) | Rotor structure of wrsm motor | |
| EP2403107A1 (en) | Permanent magnet type rotary machine | |
| CN102510197A (en) | Tapered bearingless asynchronous motor | |
| CN107359767A (en) | A kind of Halbach types array permanent magnetism disc type iron core-free hollow shaft motor | |
| CN111162629B (en) | Method for arranging stator and rotor of magnetic suspension motor | |
| WO2019196501A1 (en) | Permanent magnet synchronous gearless traction machine | |
| CN211429104U (en) | Stator and rotor structure of magnetic suspension motor | |
| CN107437851B (en) | Permanent magnet synchronous motor and electric automobile | |
| CN107437858B (en) | Motor rotor punching sheet, motor rotor, motor and electric automobile | |
| CN108869545B (en) | Inverter driving type axial-radial six-pole hybrid magnetic bearing | |
| CN113054786A (en) | High-speed permanent magnet motor | |
| KR101109721B1 (en) | Axial flow fan assembly | |
| CN112531958B (en) | Magnetic suspension single disc type motor and fan with same | |
| CN116336078A (en) | Natural electromagnetic magnetic suspension and pneumatic dynamic pressure suspension combined suspension shafting | |
| WO2022202543A1 (en) | Electric motor system, turbo compressor, and refrigeration device | |
| CN109149843B (en) | A kind of air bearing rotor bearing-free motor of slot wedge ventilation | |
| CN111102292A (en) | Magnetic suspension bearing assembly, outer rotor motor assembly and motor | |
| CN215682038U (en) | Magnetic suspension high-speed asynchronous motor without thrust disc | |
| CN219718007U (en) | Permanent magnet hybrid bearing rotor system of fuel cell hydrogen circulating pump | |
| CN220628980U (en) | Permanent magnet sinusoidal segmented high-performance high-speed surface-mounted permanent magnet synchronous motor | |
| CN116526753B (en) | Magnetic suspension motor and magnetic suspension blower with compound heat dissipation mode |
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 | ||
| CB02 | Change of applicant information |
Address after: 300457 Block D, No. 90, 12th Avenue, Binhai New Area Development Zone, Tianjin Applicant after: Tianjin Feixuan Technology Co.,Ltd. Address before: 300457 Block D, No. 90, 12th Avenue, Binhai New Area Development Zone, Tianjin Applicant before: TIANJIN EMAGING TECHNOLOGY Co.,Ltd. |
|
| CB02 | Change of applicant information | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |