CN108599499A - 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
- Publication number
- CN108599499A CN108599499A CN201810702208.6A CN201810702208A CN108599499A CN 108599499 A CN108599499 A CN 108599499A CN 201810702208 A CN201810702208 A CN 201810702208A CN 108599499 A CN108599499 A CN 108599499A
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- Prior art keywords
- stator
- iron core
- rotor
- magnetic bearing
- pole
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K17/00—Asynchronous induction motors; Asynchronous induction generators
- H02K17/02—Asynchronous induction motors
- H02K17/16—Asynchronous induction motors having rotors with internally short-circuited windings, e.g. cage rotors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/17—Stator cores with permanent magnets
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
-
- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Magnetic Bearings And Hydrostatic Bearings (AREA)
Abstract
The present invention discloses a kind of five degree of freedom stator permanent-magnet induction-type bearingless motor, include the stator in electric machine 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 the suspending power of bigger.
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 technology
Bearing-free motor with no friction, abrasion, without lubrication, it is easy to accomplish higher rotating speed and bigger Power operation, it is special
It is not induction-type bearingless motor therein there is structure and be simple to manufacture, the advantages such as rotor strength height, low cost, in high-speed machine tool
The series of high speed such as spindle motor, canned pump, centrifuge, compressor, high-speed micro hard disk directly drive field with before 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.By radial displacement transducer detection rotor radial position
It moves, builds displacement closed loop control system, realize that rotor stability suspends, and the generation 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 accuracy 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 can also 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 field is not generated in the rotor, can generate larger 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.
Invention content
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 M± 1 condition limits, and 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 mutual 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 includes the stator in electric machine casing and is located in stator
Rotor in circle, the stator include the left stator iron core being linked together, the ring of right stator conical magnetic bearing iron core, axial magnetized
Shape permanent magnet, the annular permanent magnet are connected between left stator iron core and right stator conical magnetic bearing iron core, the left stator
Stator slot, the left stator iron core and right stator conical magnetic bearing iron core are offered on iron core, right stator conical magnetic bearing iron core
Stator slot in be equipped with suspending windings and torque winding, the rotor includes that shaft and hoop are located at the rotor core of shaft periphery,
The left end of the rotor core is equipped with cylindrical end tangs, the cylindrical end tangs and left stator iron core radially aligned and between the two there are
The right end of radial air gap, the rotor core is cone corresponding with right stator conical magnetic bearing iron core, and the cone is fixed with the right side
There are air gap between sub- taper magnetic bearing iron core, the surface of the cylindrical end tangs and the surface of cone are provided with rotor slot, described turn
Cage modle conducting bar is cast in pilot trench.
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, per mutually insulated between 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 cut torque winding magnetic field, generate 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, left side by the annular permanent magnet of an axial magnetized for left motor and right motor
Suspending windings powered by DC power supply, provide suspension control magnetic flux for left motor, suspension control magnetic flux adjusts quiescent biasing
Magnetic flux generates radial suspension force on left rotor, controls left rotor radial direction two-freedom stable suspersion；The suspension on right side around
Group, which is powered, generates right side suspension control magnetic flux, and suspension control magnetic flux in right side adjusts biasing magnetic flux, generated on right end cone rotor
Suspending power perpendicular to surface, the suspending power can be analyzed to radial and axial three degree of freedom, and control rotor right radial two is certainly
By degree 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, cage modle conducting bar number of pole-pairs is identical with torque winding number of pole-pairs, cage modle conducting bar cutting torque around
Group magnetic field, generates induced current, and the rotating excitation field which forms is identical as torque winding magnetic field number of pole-pairs；And suspend around
Group magnetic field and magnetic field of permanent magnet are generated in the non-inductive rotating excitation field of cage modle conducting bar.Therefore, larger radial suspension can not only be generated
Power, 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 close
The high speeds such as envelope pump class, centrifuge, compressor, high-speed small-size hard disk drive directly drive field.
Description of the drawings
Fig. 1 is the axial arrangement and biasing magnetic circuit schematic diagram of the present 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 implementation mode
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 includes stator 1 in electric machine casing and is located at stator 1
Rotor 2 in inner ring, stator 1 include the left stator iron core 3 being linked together, right stator conical magnetic bearing iron core 4, axial magnetized
Annular permanent magnet 5, the annular permanent magnet 5 is connected between left stator iron core 3 and right stator conical magnetic bearing iron core 4, described
Stator slot, the left stator iron core 3 and right stator conical magnetic are offered on left stator iron core 3, right stator conical magnetic bearing iron core 4
Suspending windings 6 and torque winding 7 are equipped in the stator slot of bearing iron core 4, the rotor 2 includes that shaft 8 and hoop are located at outside shaft 8
The left end of the rotor core 9 in week, the rotor core 9 is equipped with cylindrical end tangs 10, the cylindrical end tangs 10 and 3 diameter of left stator iron core
To alignment and between the two there are radial air gap, the right end of the rotor core 9 is corresponding with right stator conical magnetic bearing iron core 4
Cone 11, there are air gap, the surface of cylindrical end tangs 10 and cones between the cone 11 and right stator conical magnetic bearing iron core 4
11 surface is 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 the torque winding magnetic field and corresponding rotor by both 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 suspending windings 6 and the number of pole-pairs of torque winding 7 are not
Deng, not byP B=P M± 1 condition limits, and suspending windings 6 are powered by DC power supply, and it is that left and right sides motor carries to be powered and generate suspension magnetic flux
For corresponding suspending power.
Left stator iron core 3 and right stator conical magnetic bearing iron core 4xWithyIt is equipped with perpendicular to rotor surface on direction
Radial displacement transducer 13, displacement sensor is perpendicular to rotor surface, the offset for detecting 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, poles S on a left side, annular permanent magnet provides quiescent biasing magnetic flux 14 for motor for the poles N of annular permanent magnet,
The magnetic circuit of quiescent biasing magnetic flux 14 is：Magnetic flux passes through right stator conical magnetic bearing iron core 4, the right side from the poles 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 poles S of magnet；The suspending windings in left side are powered for DC power supply, provide suspension control magnetic flux 15 for left side, magnetic circuit is：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 is：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 are generated 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 poured into a mould 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、、、Short circuit is a phase；Conducting bar、、、Short circuit 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 will produce 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 (4)
1. a kind of five degree of freedom stator permanent-magnet induction-type bearingless motor includes the stator in electric machine casing（1）With positioned at
Stator（1）Rotor in inner ring（2）, it is characterized in that：The stator（1）Including the left stator iron core being linked together（3）, right stator
Taper magnetic bearing iron core（4）, axial magnetized annular permanent magnet（5）, the annular permanent magnet（5）It is connected to left stator iron core
（3）With right stator conical magnetic bearing iron core（4）Between, the left stator iron core（3）, right stator conical magnetic bearing iron core（4）On
Offer stator slot, the left stator iron core（3）With right stator conical magnetic bearing iron core（4）Stator slot in be equipped with suspending windings
（6）With torque winding（7）, the rotor（2）Including shaft（8）It is located at shaft with hoop（8）The rotor core of periphery（9）, described
Rotor core（9）Left end be equipped with cylindrical end tangs（10）, the cylindrical end tangs（10）With left stator iron core（3）Radially aligned and two
There are radial air gap, the rotor cores between person（9）Right end be equipped with and right stator conical magnetic bearing iron core（4）The conical surface pair
The cone answered（11）, the cone（11）With right stator conical magnetic bearing iron core（4）Between there are air gap, the cylindrical end tangs
（10）Surface and cone（11）Surface be provided with rotor slot, cage modle conducting bar is cast in the rotor slot（12）；It is described left fixed
Sub- iron core（3）, right stator conical magnetic bearing iron core（4）On the stator slot number that opens up it is identical, the left stator iron core（3）, it is right
Stator conical magnetic bearing iron core（4）On torque winding（7）Number of pole-pairs is identical, the cage modle conducting bar（12）Number be even number,
Cage modle conducting bar（12）Using phase separation structure, cage modle conducting bar（12）Number of pole-pairs and torque winding（7）Number of pole-pairs it is identical；The left side
Stator core（3）With right stator conical magnetic bearing iron core（4）'sxWithyIt is equipped on direction perpendicular to the radial position of rotor surface
Displacement sensor（13）.
2. a kind of five degree of freedom stator permanent-magnet induction-type bearingless motor according to claim 1, it is characterized in that：It is described outstanding
Floating winding（6）Positioned at torque winding（7）Outside, the suspending windings（6）Number of pole-pairs and torque winding（7）Number of pole-pairs not
Deng the suspending windings（6）It is powered by DC power supply.
3. a kind of five degree of freedom stator permanent-magnet induction-type bearingless motor according to claim 2, it is characterized in that：The ring
Shape permanent magnet（5）It is made of rare earth permanent-magnetic material.
4. a kind of five degree of freedom stator permanent-magnet induction-type bearingless motor according to claim 3, it is characterised in that：It is described
Left stator iron core（3）, right stator conical magnetic bearing iron core（4）, rotor core（9）It is made of permeability magnetic material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810702208.6A CN108599499A (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 |
|---|---|---|---|
| CN201810702208.6A CN108599499A (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 |
|---|---|
| CN108599499A true CN108599499A (en) | 2018-09-28 |
Family
ID=63635152
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810702208.6A Pending CN108599499A (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) | CN108599499A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114198403A (en) * | 2021-12-31 | 2022-03-18 | 淮阴工学院 | Five-degree-of-freedom hybrid magnetic bearing |
| CN117489701A (en) * | 2023-09-15 | 2024-02-02 | 淮阴工学院 | Hybrid excitation asymmetric four-degree-of-freedom magnetic bearing and parameter design method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10062753A1 (en) * | 1999-12-23 | 2001-10-04 | Wolfgang Amrhein | Electrical drive with permanent magnet excitation for nearly wattless generation of moments of torsion and any necessary carrying forces has a four-pole mechanical winding outside and a two-pole carrying winding inside. |
| CN102510197A (en) * | 2011-11-14 | 2012-06-20 | 江苏大学 | Tapered bearingless asynchronous motor |
| CN103683779A (en) * | 2013-12-25 | 2014-03-26 | 淮阴工学院 | Stator permanent magnet biased permanent magnet type bearingless motor |
| CN104362825A (en) * | 2014-10-31 | 2015-02-18 | 国网安徽凤台县供电有限责任公司 | Winding type asynchronous motor without bearing and manufacturing method thereof |
| CN107289004A (en) * | 2017-07-27 | 2017-10-24 | 江苏大学 | A kind of vehicle-mounted flying wheel battery alternating current-direct current five degree of freedom conisphere face hybrid magnetic bearing |
-
2018
- 2018-06-30 CN CN201810702208.6A patent/CN108599499A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10062753A1 (en) * | 1999-12-23 | 2001-10-04 | Wolfgang Amrhein | Electrical drive with permanent magnet excitation for nearly wattless generation of moments of torsion and any necessary carrying forces has a four-pole mechanical winding outside and a two-pole carrying winding inside. |
| CN102510197A (en) * | 2011-11-14 | 2012-06-20 | 江苏大学 | Tapered bearingless asynchronous motor |
| CN103683779A (en) * | 2013-12-25 | 2014-03-26 | 淮阴工学院 | Stator permanent magnet biased permanent magnet type bearingless motor |
| CN104362825A (en) * | 2014-10-31 | 2015-02-18 | 国网安徽凤台县供电有限责任公司 | Winding type asynchronous motor without bearing and manufacturing method thereof |
| CN107289004A (en) * | 2017-07-27 | 2017-10-24 | 江苏大学 | A kind of vehicle-mounted flying wheel battery alternating current-direct current five degree of freedom conisphere face hybrid magnetic bearing |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114198403A (en) * | 2021-12-31 | 2022-03-18 | 淮阴工学院 | Five-degree-of-freedom hybrid magnetic bearing |
| CN117489701A (en) * | 2023-09-15 | 2024-02-02 | 淮阴工学院 | Hybrid excitation asymmetric four-degree-of-freedom magnetic bearing and parameter design method thereof |
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Application publication date: 20180928 |