CN209150965U - A kind of five degree of freedom stator permanent-magnet induction-type bearingless motor - Google Patents
A kind of five degree of freedom stator permanent-magnet induction-type bearingless motor Download PDFInfo
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- CN209150965U CN209150965U CN201821024287.1U CN201821024287U CN209150965U CN 209150965 U CN209150965 U CN 209150965U CN 201821024287 U CN201821024287 U CN 201821024287U CN 209150965 U CN209150965 U CN 209150965U
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- stator
- iron core
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- magnetic bearing
- freedom
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Abstract
The utility model discloses a kind of five degree of freedom stator permanent-magnet induction-type bearingless motor, including being located at the intracorporal stator of motor casing and the rotor in stator inner ring, the stator includes the left stator iron core being linked together, right stator conical magnetic bearing iron core, the annular permanent magnet of axial magnetized, the annular permanent magnet is connected between left stator iron core and right stator conical magnetic bearing iron core, the left stator iron core, stator slot is offered on right stator conical magnetic bearing iron core, suspending windings and torque winding are equipped in the stator slot of the left stator iron core and right stator conical magnetic bearing iron core.Control is simple and is easily achieved, and can generate bigger suspending power.
Description
Technical field
The present invention relates to technical field of motor manufacture, and in particular to simply, suspend control, torque control for compact-sized, control
Make a kind of mutually independent five degree of freedom stator permanent-magnet induction-type bearingless motor.
Background technique
Bearing-free motor with no friction, abrasion, without lubrication, it is easy to accomplish higher revolving speed and more high-power operation, spy
It is not that induction-type bearingless motor therein has structure and is simple to manufacture, the advantages such as rotor strength height, low cost, in high-speed machine tool
Before the series of high speed such as spindle motor, canned pump, centrifuge, compressor, high-speed micro hard disk directly drive field with wide application
Scape.
Currently, induction-type bearingless motor be superimposed on the torque winding by the stator slot in conventional asynchronous motor it is a set of attached
The suspending windings added, double winding respectively by frequency identical three-phase alternating-current supply power supply generate rotation suspending windings magnetic field and
Torque winding magnetic field, and suspending windings magnetic field number of pole-pairs isP B, torque winding magnetic field beP M, only meet between the twoP B=P M±
When 1 relationship, stably and controllable radial suspension force could be generated on rotor.Rotor radial position is detected by radial displacement transducer
It moves, constructs displacement closed loop control system, realize that rotor stability suspends, and the production principle of torque is identical as common asynchronous moter.
On the one hand, torque winding magnetic field will generate radial suspension force, on the other hand, torque winding magnetic with suspending windings magnetic field interaction
Field interacts with rotor rotating excitation field generate torque again, and therefore, there are close coupling, controls between direct torque and Bit andits control
System is complicated, it is difficult to establish accurate mathematical model, control precision is low.In addition, in addition to the meeting in rotor bar of torque winding magnetic field
It induces except rotor rotating excitation field identical with torque winding magnetic field number of pole-pairs, suspending windings magnetic field also can be in rotor bar
Rotor rotating excitation field identical with suspending windings magnetic field number of pole-pairs is induced, which has weakening to make to suspending power
With also will increase the complexity of direct torque and Bit andits control, become apparent when especially bringing onto load is run, will be made when serious
Unstable at system, suspend failure.There is scholar to propose the rotor cage modle conducting bar phase separation structure of induction-type bearingless motor, the structure
Induction-type bearingless motor rotor in only induce rotor field identical with torque winding magnetic field number of pole-pairs, and suspending windings magnetic
Induced magnetic field is not generated in the rotor, can generate biggish radial suspension force, reduce control complexity, but the structure
There is still a need for meet for induction-type bearingless motorP B=P M± 1 relationship, and there are between torque winding magnetic field and suspending windings magnetic field
It is strong coupling, the control of Dynamic Nonlinear Decoupling between the two is still extremely complex.In addition, being propped up by induction-type bearingless motor
It supports rotor stability to suspend, needs the two-freedom induction-type bearingless motor, two-freedom magnetic bearing, Three Degree Of Freedom magnetic of multiple units
Bearing, single-degree-of-freedom axial magnetic bearing form five-degree magnetic suspension system, and therefore, there are structure and control complexity, bodies for the system
The disadvantages such as product is huge, and critical speed is low.
Summary of the invention
The purpose of the present invention is overcoming the shortcomings of existing five degrees of freedom without bearing Induction Motor System, provide it is a kind of not byP B=P MThe limitation of ± 1 condition only induces rotating excitation field identical with torque winding magnetic field number of pole-pairs in the rotor, and control is simple,
Suspension control, direct torque are mutually indepedent, and a kind of five degree of freedom stator permanent-magnet that can generate bigger radial suspension force is shaftless
Hold asynchronous machine.
The invention is realized by the following technical scheme:
A kind of five degree of freedom stator permanent-magnet induction-type bearingless motor, including be located at the intracorporal stator of motor casing and be located at and determine
Rotor in sub- inner ring, the stator include the left stator iron core being linked together, right stator conical magnetic bearing iron core, axial magnetized
Annular permanent magnet, the annular permanent magnet is connected between left stator iron core and right stator conical magnetic bearing iron core, the left side
Stator slot, the left stator iron core and right stator conical magnetic bearing are offered in stator core, right stator conical magnetic bearing iron core
Suspending windings and torque winding are equipped in the stator slot of iron core, the rotor includes the rotor iron that shaft and hoop are located at shaft periphery
The heart, the left end of the rotor core are equipped with cylindrical end tangs, the cylindrical end tangs and left stator iron core radially aligned and between the two
There are radial air gap, the right end of the rotor core is cone corresponding with right stator conical magnetic bearing iron core, the cone with
There are air gap, the surface of the cylindrical end tangs and the surfaces of cone to be provided with rotor slot between right stator conical magnetic bearing iron core, institute
It states and is cast with cage modle conducting bar in rotor slot.
The further improvement project of the present invention is opened up on the left stator iron core, right stator conical magnetic bearing iron core
Stator slot number is identical, and the torque winding number of pole-pairs on the left stator iron core, right stator conical magnetic bearing iron core is identical, described
The number of cage modle conducting bar is even number, and cage modle conducting bar uses phase separation structure, mutually insulated between every phase, the number of pole-pairs of cage modle conducting bar with
The number of pole-pairs of torque winding is identical.Cage modle conducting bar cuts torque winding magnetic field, generates a rotating excitation field, the rotating excitation field with turn
Square winding magnetic field number of pole-pairs is identical；And cage modle conducting bar cutting suspending windings magnetic field and quiescent biasing magnetic field do not generate rotating excitation field.
The further improvement project of the present invention is that the suspending windings are located at the outside of torque winding, the suspending windings
Number of pole-pairs and the number of pole-pairs of torque winding differ, the suspending windings are powered by DC power supply.
The further improvement project of the present invention is, the left stator iron core and right stator conical magnetic bearing iron corexWithySide
Radial displacement transducer perpendicular to rotor surface is installed upwards.
The further improvement project of the present invention is that the annular permanent magnet is made of rare earth permanent-magnetic material.
The further improvement project of the present invention is the left stator iron core, right stator conical magnetic bearing iron core, rotor iron
The heart, shaft are made of permeability magnetic material.
The present invention has following obvious advantage compared with prior art:
The present invention provides quiescent biasing magnetic flux by the annular permanent magnet of an axial magnetized for left motor and right motor,
The suspending windings in left side are powered by DC power supply, provide suspension control magnetic flux for left motor, suspension control magnetic flux adjusts static
Magnetic flux is biased, radial suspension force is generated on left rotor, controls left rotor radial direction two-freedom stable suspersion；Right side hangs
Floating winding, which is powered, generates right side suspension control magnetic flux, and suspension control magnetic flux in right side adjusts biasing magnetic flux, on right end cone rotor
The suspending power perpendicular to surface is generated, which can be analyzed to radial and axial three degree of freedom, control rotor right radial
Two-freedom and axial single-degree-of-freedom stable suspersion.Therefore, control, direct torque are suspended independently of each other and cage modle conducting bar number is
Even number, cage modle conducting bar use phase separation structure, and cage modle conducting bar number of pole-pairs is identical as torque winding number of pole-pairs, and cage modle conducting bar cuts torque
Winding magnetic field, generates induced current, and the rotating excitation field which forms is identical as torque winding magnetic field number of pole-pairs；And it suspends
Winding magnetic field and magnetic field of permanent magnet are generated in the non-inductive rotating excitation field of cage modle conducting bar.Therefore, it is outstanding not only to can produce biggish radial direction
Buoyancy, and controlling simply and the advantages of be easily achieved, can be widely applied to flywheel energy storage, various high-speed machine tool spindle motors and
The high speed such as canned pump class, centrifuge, compressor, high-speed small-size hard disk drive directly drives field.
Detailed description of the invention
Fig. 1 is axial arrangement and biasing magnetic circuit schematic diagram of the invention.
Fig. 2 is arranged on left and right sides machine winding of the present invention arrangement and radial magnetic circuit schematic diagram.
Fig. 3 is that arranged on left and right sides rotor cage modle conducting bar U of the present invention is connected schematic diagram.
Fig. 4 is that arranged on left and right sides rotor cage modle conducting bar V of the present invention is connected schematic diagram.
Fig. 5 is that arranged on left and right sides rotor cage modle conducting bar W of the present invention is connected schematic diagram.
Specific embodiment
It is as shown in Figs. 1-5 with number of stator slots for 12 slots, suspending windings number of pole-pairs is 1, and torque winding number of pole-pairs is 2, three
It is described in detail for phase motor:
A kind of five degree of freedom stator permanent-magnet induction-type bearingless motor, including be located at the intracorporal stator 1 of motor casing and be located at
Rotor 2 in 1 inner ring of stator, stator 1 include the left stator iron core 3 being linked together, right stator conical magnetic bearing iron core 4, axial direction
Magnetized annular permanent magnet 5, the annular permanent magnet 5 be connected to left stator iron core 3 and right stator conical magnetic bearing iron core 4 it
Between, stator slot is offered on the left stator iron core 3, right stator conical magnetic bearing iron core 4, the left stator iron core 3 and the right side are fixed
Suspending windings 6 and torque winding 7 are equipped in the stator slot of sub- taper magnetic bearing iron core 4, the rotor 2 includes that shaft 8 and hoop are set
The left end of rotor core 9 in 8 periphery of shaft, the rotor core 9 is equipped with cylindrical end tangs 10, the cylindrical end tangs 10 and Zuo Ding
Sub- 3 radially aligned of iron core and between the two there are radial air gap, the right end of the rotor core 9 are and right stator conical magnetic bearing
The corresponding cone 11 of iron core 4, there are air gap between the cone 11 and right stator conical magnetic bearing iron core 4, cylindrical end tangs 10
Surface and the surface of cone 11 are provided with rotor slot, and cage modle conducting bar 12 is cast in the rotor slot.
The stator slot number opened up on left stator iron core 3, right stator conical magnetic bearing iron core 4 is identical, the left stator iron
7 number of pole-pairs of torque winding on the heart 3, right stator conical magnetic bearing iron core 4 is identical, and the number of the cage modle conducting bar 12 is even number,
Cage modle conducting bar 12 uses phase separation structure, and the number of pole-pairs of cage modle conducting bar 12 is identical as the number of pole-pairs of torque winding 7, the cutting of cage modle conducting bar
The rotor rotating excitation field of torque winding magnetic field, generation is identical as torque winding magnetic field number of pole-pairs；And suspending windings magnetic field and permanent magnetism
Body magnetic field does not induce rotor rotating excitation field in cage modle conducting bar.Torque is torque winding magnetic field and the corresponding rotor by two sides
Rotating excitation field interaction generates, and the total torque of five degrees of freedom without bearing asynchronous machine is the sum of the rotating torques at both ends.
Suspending windings 6 are located at the outside of torque winding 7, and the number of pole-pairs of the numbers of pole-pairs of suspending windings 6 and torque winding 7 is not
Deng, not byP B=P MThe limitation of ± 1 condition, suspending windings 6 are powered by DC power supply, and being powered and generating suspension magnetic flux is that left and right sides motor mentions
For corresponding suspending power.
Left stator iron core 3 and right stator conical magnetic bearing iron core 4xWithyIt is equipped on direction perpendicular to rotor surface
Radial displacement transducer 13, displacement sensor is perpendicular to rotor surface, for detecting the offset of arranged on left and right sides rotor, respectively
The displacement closed loop control system for establishing arranged on left and right sides can allow rotor to return to flat to the rotor application power opposite with offset direction
Weighing apparatus position realizes that rotor five degree of freedom stable suspersion realizes rotor five degree of freedom stable suspersion.
Annular permanent magnet 5 is made of rare earth permanent-magnetic material.Left stator iron core 3, right stator conical magnetic bearing iron core 4, rotor
Iron core 9 is made of permeability magnetic material.
Wherein, in the right, pole S on a left side, annular permanent magnet provides quiescent biasing magnetic flux 14 for motor for the pole N of annular permanent magnet,
The magnetic circuit of quiescent biasing magnetic flux 14 are as follows: magnetic flux passes through right stator conical magnetic bearing iron core 4, the right side from the pole N of annular permanent magnet
Side air gap, the cone on the rotor right side, the cylindrical end tangs of rotor core left end, left radial air gap, left stator iron core return to annular forever
The pole S of magnet；The suspending windings in left side are DC power supply power supply, provide suspension control magnetic flux 15, magnetic circuit for left side are as follows: Zuo Ding
Sub- iron core upside, upside radial air gap, rotor, downside radial air gap, left stator iron core downside, using the stator of corresponding motor
Yoke constitutes closed circuit；The magnetic circuit for the suspension control magnetic flux 16 that the suspending windings on right side generate are as follows: right stator conical magnetic bearing iron
4 upside of the heart, upside air gap, rotor cone, downside air gap, right stator conical magnetic bearing iron core downside, using right motor
Stator yoke constitutes closed circuit；Quiescent biasing magnetic flux 14, suspension control magnetic flux 15 interact, and diameter is generated on left rotor
To two-freedom suspending power；Quiescent biasing magnetic flux 14, suspension control magnetic flux 16 interact, and generate in the cone of right rotor
Radial and axial Three Degree Of Freedom suspending power；Suspending windings, torque winding invade paint after being all made of the electromagnetic coil coiling of well conducting
It dries.
The torque coils arrangement mode of the stator slot internal layer of arranged on left and right sides is identical, identical as common asynchronous moter；Suspend around
Group is then divided intoxDirection suspension control winding andyDirection suspension control winding,xDirection controlling winding includes windingL X1~ L X12, press
It connects according to direction shown in Fig. 2；yDirection suspension control winding includes windingL Y1~ L Y12, gone here and there according to direction shown in Fig. 2
Connection.
The cage modle conducting bar outer layer insulation being poured in rotor slot, by rotor slot be 12 slots for, by termination portion by its
Split-phase, since torque winding is 3 phase, 4 pole, the rotor bar number of phases and number of poles must be identical as torque winding, therefore conducting bar is also classified into
3 phase, 4 pole, i.e. conducting bar、、、Being shorted is a phase；Conducting bar、、、Being shorted is a phase；Conducting bar、、、It is short
It is connected in a phase；And mutually insulated between three-phase.It is arranged in this manner, in the motor operation, suspending windings magnetic field, torque
Only torque winding magnetic field can generate rotor rotation in rotor bar in the bias magnetic field three that winding magnetic field and permanent magnet generate
Turn magnetic field.
Part that the present invention does not relate to is the same as those in the prior art or can be realized by using the prior art.
Claims (6)
1. a kind of five degree of freedom stator permanent-magnet induction-type bearingless motor, including be located at the intracorporal stator of motor casing (1) and be located at
Rotor (2) in stator (1) inner ring, it is characterized in that: the stator (1) includes left stator iron core (3), the right stator being linked together
The annular permanent magnet (5) of taper magnetic bearing iron core (4), axial magnetized, the annular permanent magnet (5) are connected to left stator iron core
(3) between right stator conical magnetic bearing iron core (4), on the left stator iron core (3), right stator conical magnetic bearing iron core (4)
It offers stator slot, suspending windings is equipped in the stator slot of the left stator iron core (3) and right stator conical magnetic bearing iron core (4)
(6) and torque winding (7), the rotor (2) includes the rotor core (9) that shaft (8) and hoop are located at shaft (8) periphery, described
The left end of rotor core (9) is equipped with cylindrical end tangs (10), the cylindrical end tangs (10) and left stator iron core (3) radially aligned and two
There are radial air gap between person, the right end of the rotor core (9) is equipped with the conical surface pair with right stator conical magnetic bearing iron core (4)
The cone (11) answered, there are air gap, the cylindrical end tangs between the cone (11) and right stator conical magnetic bearing iron core (4)
(10) surface on surface and cone (11) is provided with rotor slot, and cage modle conducting bar (12) are cast in the rotor slot.
2. a kind of five degree of freedom stator permanent-magnet induction-type bearingless motor according to claim 1, it is characterised in that: described
The stator slot number opened up on left stator iron core (3), right stator conical magnetic bearing iron core (4) is identical, the left stator iron core
(3), torque winding (7) number of pole-pairs on right stator conical magnetic bearing iron core (4) is identical, and the number of the cage modle conducting bar (12) is
Even number, cage modle conducting bar (12) use phase separation structure, and the number of pole-pairs of cage modle conducting bar (12) is identical as the number of pole-pairs of torque winding (7).
3. a kind of five degree of freedom stator permanent-magnet induction-type bearingless motor according to claim 2, it is characterized in that: described outstanding
Floating winding (6) are located at the outside of torque winding (7), and the number of pole-pairs of the numbers of pole-pairs of the suspending windings (6) and torque winding (7) is not
Deng the suspending windings (6) are powered by DC power supply.
4. a kind of five degree of freedom stator permanent-magnet induction-type bearingless motor according to claim 1, it is characterized in that: the left side
Stator core (3) and right stator conical magnetic bearing iron core (4)xWithyRadial position perpendicular to rotor surface is installed on direction
Displacement sensor (13).
5. a kind of five degree of freedom stator permanent-magnet induction-type bearingless motor according to claim 4, it is characterized in that: the ring
Shape permanent magnet (5) is made of rare earth permanent-magnetic material.
6. a kind of five degree of freedom stator permanent-magnet induction-type bearingless motor according to claim 5, it is characterised in that: described
Left stator iron core (3), right stator conical magnetic bearing iron core (4), rotor core (9) are made of permeability magnetic material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821024287.1U CN209150965U (en) | 2018-06-30 | 2018-06-30 | A kind of five degree of freedom stator permanent-magnet induction-type bearingless motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821024287.1U CN209150965U (en) | 2018-06-30 | 2018-06-30 | A kind of five degree of freedom stator permanent-magnet induction-type bearingless motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209150965U true CN209150965U (en) | 2019-07-23 |
Family
ID=67264890
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821024287.1U Expired - Fee Related CN209150965U (en) | 2018-06-30 | 2018-06-30 | A kind of five degree of freedom stator permanent-magnet induction-type bearingless motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209150965U (en) |
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2018
- 2018-06-30 CN CN201821024287.1U patent/CN209150965U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20201217 Address after: 223001 1-348, commercial floor 3, Yigao Plaza, qingjiangpu District, Huai'an City, Jiangsu Province Patentee after: Huaian yiyisheng Intelligent Technology Co.,Ltd. Address before: 223100 A12-2, high tech Industrial Park, three East seven street, Hongze District, Huaian, Jiangsu (Hongze technology transfer center Hongze sub center) Patentee before: HUAIYIN INSTITUTE OF TECHNOLOGY |
|
| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190723 Termination date: 20210630 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |