CN108718144A - Four-degree-of-freedom stator permanent-magnet induction-type bearingless motor - Google Patents
Four-degree-of-freedom stator permanent-magnet induction-type bearingless motor Download PDFInfo
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- CN108718144A CN108718144A CN201810702225.XA CN201810702225A CN108718144A CN 108718144 A CN108718144 A CN 108718144A CN 201810702225 A CN201810702225 A CN 201810702225A CN 108718144 A CN108718144 A CN 108718144A
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- stator
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- iron core
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- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Induction Machinery (AREA)
Abstract
The present invention discloses a kind of four-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 core,The annular permanent magnet of axial magnetized,The annular permanent magnet is connected between left stator iron core and right stator core,The left stator iron core,Stator slot is offered in right stator core,Suspending windings and torque winding are equipped in the left stator iron core and the stator slot of right stator core,The rotor includes the rotor core that shaft and hoop are located at shaft periphery,The left and right ends of the rotor core are equipped with cylindrical end tangs,The cylindrical end tangs at both ends respectively with left stator iron core,Right stator core radially aligned,The surface of the cylindrical end tangs is provided with rotor slot,It is cast with cage modle conducting bar in the rotor slot or is wound with rotor windings.The four-degree-of-freedom stator permanent-magnet induction-type bearingless motor of the structure can not only generate larger radial suspension force, and control simply and be easily achieved.
Description
Technical field
The present invention relates to technical field of motor manufacture, and in particular to control is simple, and the control that suspends, direct torque are mutually only
It is vertical, and the four-degree-of-freedom stator permanent-magnet induction-type bearingless motor of bigger radial suspension force can be generated.
Background technology
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 induction-type bearingless motor structure of rotor bar phase separation structure, but should
There is still a need for meet for number of pole-pairs between the suspending windings and torque winding of motorP B=P M± 1 relationship, torque winding magnetic field should
Torque is generated with rotor field, generates suspending power with suspending windings magnetic field again, there is complicated coupled relation, between the two
Decoupling control is extremely complex, computationally intensive, limits the popularization of its commercial Application.
Invention content
The purpose of the present invention is overcoming the shortcomings of existing induction-type bearingless motor, provide it is a kind of not byP B=P M± 1 condition
Limitation only induces rotating excitation field identical with torque winding magnetic field number of pole-pairs in the rotor, and control is simple, and the control that suspends turns
Square control is mutual indepedent, can generate a kind of four-degree-of-freedom stator permanent-magnet induction-type bearingless motor of bigger radial suspension force.
The invention is realized by the following technical scheme：
Four-degree-of-freedom stator permanent-magnet induction-type bearingless motor includes the stator in electric machine casing and is located in stator inner ring
Rotor, the stator includes the annular permanent magnet of the left stator iron core being linked together, right stator core, axial magnetized, described
Annular permanent magnet is connected between left stator iron core and right stator core, is offered on the left stator iron core, right stator core
Suspending windings and torque winding, the rotor packet are equipped in the stator slot of stator slot, the left stator iron core and right stator core
It includes shaft and hoop is located at the rotor core of shaft periphery, the left and right ends of the rotor core are equipped with cylindrical end tangs, the column at both ends
For shape boss respectively with left stator iron core, right stator core radially aligned, the surfaces of the cylindrical end tangs is provided with rotor slot, described turn
It is cast with cage modle conducting bar in pilot trench or is wound with rotor windings.
The further improvement project of the present invention is the stator slot number opened up on the left stator iron core, right stator core
It is identical；The number of the rotor slot is even number, and cage modle conducting bar or rotor windings use phase separation structure, cage modle conducting bar or rotor windings
Number of pole-pairs it is identical as the number of pole-pairs of torque winding.
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 corexWithyIt is equipped on direction
Perpendicular to the radial displacement transducer of rotor surface.
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 that the left stator iron core, right stator core, rotor core are by magnetic conduction material
Material is made.
Compared with prior art, the present invention having following obvious advantage：
The present invention provides quiescent biasing magnetic flux by the annular permanent magnet of an axial magnetized, and suspending windings are powered by DC power supply,
Suspension control magnetic flux is generated, the two interaction by displacement sensor closed-loop control, realizes the stable suspersion of rotor, and turns
Square is generated by torque winding magnetic field and the interaction of rotor induced field.Therefore, suspension control, direct torque are mutual indepedent,
In addition, cage modle conducting bar or rotor windings are even number, it is all made of phase separation structure, the number of pole-pairs and torque of cage modle conducting bar or rotor windings
Winding number of pole-pairs is identical, cuts torque winding magnetic field, generates induced current, the rotating excitation field and torque which forms
Winding magnetic field number of pole-pairs is identical；And the induction that suspending windings magnetic field and magnetic field of permanent magnet cutting cage modle conducting bar or rotor windings generate
Electromotive force whole cancel themselves, non-inductive electric current are generated with rotating excitation field.Therefore, larger radial suspension force can be not only generated,
And control is simple and is easily achieved.
Description of the drawings
Fig. 1 is the axial arrangement schematic diagram of the present invention.
Fig. 2 is left motor iron core coils arrangement of the present invention and radial magnetic circuit schematic diagram.
Fig. 3 is right motor iron core coils arrangement of the present invention and radial magnetic circuit schematic diagram.
Fig. 4 is that rotor cage modle conducting bar U of the present invention is connected schematic diagram.
Fig. 5 is that rotor cage modle conducting bar V of the present invention is connected schematic diagram.
Fig. 6 is that rotor cage modle conducting bar W of the present invention is connected schematic diagram.
Fig. 7 is rotor windings connection diagram of the present invention.
Specific implementation mode
As shown in Fig. 1 to 7, with rotor slot for 12 slots, suspending windings number of pole-pairs is 1, and torque winding number of pole-pairs is 2, three-phase
It is described in detail for motor：
Four-degree-of-freedom stator permanent-magnet induction-type bearingless motor includes stator 1 in electric machine casing and is located at 1 inner ring of stator
In rotor 2, the stator 1 include be linked together left stator iron core 3, right stator core 4, axial magnetized annular permanent magnet
5.The annular permanent magnet 5 is connected between left stator iron core 3 and right stator core 4, and annular permanent magnet 5 provides static state for motor
Bias magnetic flux.Offer stator slot on left stator iron core 3, right stator core 4, the left stator iron core 3 and right stator core 4
Suspending windings 6 and torque winding 7 are equipped in stator slot, the rotor 2 includes the rotor iron that shaft 8 and hoop are located at 8 periphery of shaft
The heart 9, the left and right ends of the rotor core 9 are equipped with cylindrical end tangs 10, the cylindrical end tangs 10 at both ends respectively with left stator iron core 3,
The surface of 4 radially aligned of right stator core, the cylindrical end tangs 10 is provided with rotor slot, and cage modle conducting bar is cast in the rotor slot
11 or it is wound with rotor windings 12.
The stator slot number opened up on left stator iron core 3, right stator core 4 is identical, and the number of the rotor slot is even number,
Cage modle conducting bar 11 or rotor windings 12 use the number of pole-pairs and torque winding 7 of phase separation structure, cage modle conducting bar 11 or rotor windings 12
Number of pole-pairs it is identical.Cage modle conducting bar or rotor windings cut torque winding magnetic field, rotor rotating excitation field and the torque winding of generation
Magnetic field number of pole-pairs is identical；And suspending windings magnetic field does not induce rotor rotating excitation field with magnetic field of permanent magnet in rotor windings.
Suspending windings 6 are located at the outside of torque winding 7, the number of pole-pairs of the number of pole-pairs and torque winding 7 of the suspending windings 6
It differs, the suspending windings 6 are powered by DC power supply.Without meetingP B=P M± 1 relationship only needs to meetP B≠P M。
Annular permanent magnet 5 is made of rare earth permanent-magnetic material.Left stator iron core 3, right stator core 4, rotor core 9 are by leading
Magnetic material is made.
Annular permanent magnet provides quiescent biasing magnetic flux 14 for motor, and the magnetic circuit of quiescent biasing magnetic flux 14 is：Magnetic flux is from annular
The poles N of permanent magnet are set out, and right stator core, right radial air gap, rotor core, left radial air gap, left stator iron core are passed through
The poles S of annular permanent magnet are returned to, suspending windings are powered for DC power supply, and suspension control magnetic flux 15,16 is provided for motor, and suspend control
The magnetic circuit of magnetic flux 15 processed is：Left stator iron core upside, upside radial air gap, rotor, downside radial air gap, left stator iron core downside
Closed circuit is constituted using the stator yoke on the left of motor；The magnetic circuit that suspending windings generate suspension control magnetic flux 16 is：Right stator
Iron core upside, upside radial air gap, rotor, downside radial air gap, right stator core downside are using the stator yoke on the right side of motor
Constitute closed circuit；Quiescent biasing magnetic flux 14, suspension control magnetic flux 15 interact, and radial suspension force is generated on the left of rotor；
Quiescent biasing magnetic flux 14, suspension control magnetic flux 16 interact, and radial suspension force is generated on the right side of rotor；Torque winding and suspension
Winding, which is all made of after the electromagnetic coil coiling of well conducting, invades paint and dries.
Stator slot internal layer is torque winding, and arrangement is identical as common asynchronous moter；Left side suspending windings are divided intoxDirection suspends
Control winding andyDirection suspension control winding,xDirection suspension control winding includes windingL X1~ L X12, as illustrated 2 directions go here and there
Connection；yDirection suspension control winding includes windingL Y1~ L Y12, 2 directions series connection as illustrated can.Right side suspending windings
It is divided intoxDirection controlling winding andyDirection suspension control winding,xDirection controlling winding includes windingR X1~ R X12, 3 side as illustrated
To series connection；yDirection suspension control winding includes windingR Y1~ R Y12, 3 directions series connection as illustrated.
Rotor surface is provided with rotor slot, pours into a mould cage modle conducting bar in rotor slot or wound rotor winding, rotor slot number are
Even number；By taking the slot number of rotor slot is 12 as an example, cage modle conducting bar outer layer insulation, by termination portion by its split-phase, due to torque around
Group is that 3 phase, 4 pole, the rotor bar number of phases or the rotor windings number of phases and number of poles must be identical as torque winding, thus cage modle conducting bar or
Rotor windings are also classified into 3 phase, 4 pole, i.e. cage modle conducting bar or rotor windings、、、Short circuit is a phase；Conducting bar、、、
Short circuit is a phase；Conducting bar、、、Short circuit is a phase；Each phase self-contained closed circuit.It is arranged in this manner, in the electricity
When machine is run, there was only torque winding magnetic in the bias magnetic field three that suspending windings magnetic field, torque winding magnetic field and permanent magnet generate
Field will produce rotor rotating excitation field in rotor bar.
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. four-degree-of-freedom stator permanent-magnet induction-type bearingless motor includes the stator in electric machine casing（1）With positioned at stator
（1）The rotor of inner ring（2）, it is characterized in that：The stator（1）Including the left stator iron core being linked together（3）, right stator 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 core
（4）Between, the left stator iron core（3）, right stator core（4）On offer stator slot, the left stator iron core（3）It is fixed with the right side
Sub- iron core（4）Stator slot in be equipped with suspending windings（6）With torque winding（7）, the rotor（2）Including shaft（8）It is set with hoop
In shaft（8）The rotor core of periphery（9）, the rotor core（9）Left and right ends be equipped with cylindrical end tangs（10）, the column at both ends
Shape boss（10）Respectively with left stator iron core（3）, right stator core（4）Radially aligned, the cylindrical end tangs（10）Surface open
There is rotor slot, cage modle conducting bar is cast in the rotor slot（11）Or it is wound with rotor windings（12）；The left stator iron core
（3）, right stator core（4）On the stator slot number that opens up it is identical；The number of the rotor slot is even number, cage modle conducting bar（11）Or
Rotor windings（12）Using phase separation structure, cage modle conducting bar（11）Or rotor windings（12）Number of pole-pairs and torque winding（7）Pole
Logarithm is identical；Left stator iron core（3）With right stator core（4）'sxWithyIt is equipped on direction perpendicular to the radial position of rotor surface
Displacement sensor（13）.
2. four-degree-of-freedom stator permanent-magnet induction-type bearingless motor according to claim 1, it is characterized in that：It is described suspend around
Group（6）Positioned at torque winding（7）Outside, the suspending windings（6）Number of pole-pairs and torque winding（7）Number of pole-pairs differ,
The suspending windings（6）It is powered by DC power supply.
3. four-degree-of-freedom stator permanent-magnet induction-type bearingless motor according to claim 2, it is characterized in that：The annular is forever
Magnet（5）It is made of rare earth permanent-magnetic material.
4. four-degree-of-freedom stator permanent-magnet induction-type bearingless motor according to claim 3, it is characterised in that：It is described left fixed
Sub- 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 |
|---|---|---|---|
| CN201810702225.XA CN108718144A (en) | 2018-06-30 | 2018-06-30 | Four-degree-of-freedom stator permanent-magnet induction-type bearingless motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810702225.XA CN108718144A (en) | 2018-06-30 | 2018-06-30 | Four-degree-of-freedom stator permanent-magnet induction-type bearingless motor |
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| Publication Number | Publication Date |
|---|---|
| CN108718144A true CN108718144A (en) | 2018-10-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810702225.XA Pending CN108718144A (en) | 2018-06-30 | 2018-06-30 | Four-degree-of-freedom stator permanent-magnet induction-type bearingless motor |
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| Country | Link |
|---|---|
| CN (1) | CN108718144A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113241919A (en) * | 2021-05-27 | 2021-08-10 | 江苏大学 | Bearing-free composite rotor cage type asynchronous motor |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
-
2018
- 2018-06-30 CN CN201810702225.XA patent/CN108718144A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113241919A (en) * | 2021-05-27 | 2021-08-10 | 江苏大学 | Bearing-free composite rotor cage type asynchronous motor |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181030 |
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| RJ01 | Rejection of invention patent application after publication |