CN108696191A - A kind of integrated form five degrees of freedom without bearing asynchronous machine - Google Patents
A kind of integrated form five degrees of freedom without bearing asynchronous machine Download PDFInfo
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- CN108696191A CN108696191A CN201810702214.1A CN201810702214A CN108696191A CN 108696191 A CN108696191 A CN 108696191A CN 201810702214 A CN201810702214 A CN 201810702214A CN 108696191 A CN108696191 A CN 108696191A
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- iron core
- rotor
- axial
- magnetic
- suction plate
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N15/00—Holding or levitation devices using magnetic attraction or repulsion, not otherwise provided for
Abstract
The present invention discloses a kind of integrated form five degrees of freedom without bearing asynchronous machine, including stator, positioned at the rotor of stator inner ring, the stator in an axial direction from left to right successively include left electric machine iron core, left annular permanent magnet magnetized in an axial direction, left axial magnetic bearing iron core, every magnetic aluminium ring, right axial magnetic bearing iron core, right annular permanent magnet magnetized in an axial direction and right electric machine iron core, the inner circumferential of the left and right electric machine iron core is uniformly provided with stator slot, and suspending windings and torque winding are provided in the stator slot;It is radially distributed with the upper and lower suction plate of annular on the medial surface of the left and right axial magnetic bearing iron core, the magnetic conduction bridge of annular is equipped between the upper and lower suction plate, embedded axial direction control winding between the upper suction plate, lower suction plate and magnetic conduction bridge.The present invention provides five degree of freedom quiescent biasing magnetic flux by the annular permanent magnet of two axial magnetizeds for motor, realizes rotor five degree of freedom stable suspersion, and compact-sized, control is simple.
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
System is mutual indepedent, and rotor stability suspension operation can be realized in a unit, generates a kind of integrated form five of bigger suspending power
Degrees of freedom without bearing asynchronous machine.
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 induction-type bearingless motor of rotor cage modle conducting bar phase separation structure, but should
The torque winding and suspending windings of the motor of structure still need to meetP B=P M± 1 relationship, between suspending power and torque and coupling
There is no solutions.In addition, induction-type bearingless motor supports rotor stability suspension operation, it is also necessary to the two-freedoms of multiple units
Induction-type bearingless motor, two-freedom magnetic bearing, Three Degree Of Freedom magnetic bearing, single-degree-of-freedom axial magnetic bearing composition five degree of freedom are outstanding
Floating system, therefore, the disadvantages such as there are structures and control complexity for the system, bulky, and critical speed is low limit its commercial Application
Field.
Invention content
The present invention overcomes existing defect to provide a kind of integrated form five degrees of freedom without bearing asynchronous machine, and control is simple, suspends
Control, direct torque are mutual indepedent.
The invention is realized by the following technical scheme:
A kind of integrated form five degrees of freedom without bearing asynchronous machine, including stator, positioned at the rotor of stator inner ring, the stator is along axis
To from left to right successively include left electric machine iron core, left annular permanent magnet magnetized in an axial direction, left axial magnetic bearing iron core, every magnetic aluminium
Ring, right axial magnetic bearing iron core, right annular permanent magnet magnetized in an axial direction and right electric machine iron core, the left and right electric machine iron core
Inner circumferential be uniformly provided with stator slot, suspending windings and torque winding are provided in the stator slot;The left and right axial magnetic bearing
It is radially distributed with the upper and lower suction plate of annular on the medial surface of iron core, the magnetic conduction of annular is equipped between the upper and lower suction plate
Bridge, embedded axial direction control winding between the upper suction plate, lower suction plate and magnetic conduction bridge;The rotor include shaft, hoop be located at
The rotor core of shaft periphery, put in the middle part of the rotor core between left and right axial magnetic bearing iron core and with upper and lower suction
There are axial air-gap, the left and right end circumference boss with outward extension of the rotor core, both ends between disk and magnetic conduction bridge
Circumference boss on offer rotor slot, cage modle conducting bar is equipped in the rotor slot.
The further improvement project of the present invention is that the cage modle conducting bar number is even number, cage modle conducting bar uses phase separation structure,
Cage modle conducting bar number of pole-pairs is identical as the torque winding number of pole-pairs.
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 that the left end circumference boss of the left electric machine iron core and rotor core is radially right
Together, the right end circumference boss of the rotor core and right electric machine iron core radially aligned.
The further improvement project of the present invention is, the poles N of the left annular permanent magnet and right annular permanent magnet respectively with a left side
Axial magnetic bearing iron core and right axial magnetic bearing iron core are adjacent, and the left annular permanent magnet and right annular permanent magnet are by rare earth permanent magnet
Material is made.
The further improvement project of the present invention is that the axial air-gap between the upper and lower suction plate and rotor core is less than
Axial air-gap between magnetic conduction bridge and rotor core.
Compared with prior art, the present invention having following obvious advantage:
The present invention provides five degree of freedom quiescent biasing magnetic flux by the annular permanent magnet of two axial magnetizeds for motor, compact-sized,
Five degree of freedom stable suspersion is can be achieved in a unit.Arranged on left and right sides suspending windings are powered by DC power supply, are generated left and right
Both sides radial suspension control magnetic flux;Axial control winding energization generates left side axial suspension control magnetic flux respectively and right side is axially outstanding
Floating control magnetic flux, each suspension control magnetic flux interact with corresponding biasing magnetic flux, realize rotor five degree of freedom stable suspersion, and
Torque is to be interacted to generate by the torque winding magnetic field and rotor induced field of arranged on left and right sides.Therefore, suspend control, torque
Control is independently of each other and cage modle conducting bar number is even number, and cage modle conducting bar uses phase separation structure, cage modle conducting bar number of pole-pairs and torque around
Group number of pole-pairs it is identical, cage modle conducting bar cut torque winding magnetic field, generate induced current, the induced current formed rotating excitation field with
Torque winding magnetic field number of pole-pairs is identical;And the induced electromotive force that suspending windings magnetic field and magnetic field of permanent magnet are generated in cage modle conducting bar is complete
Portion's cancel themselves, non-inductive electric current are generated with rotating excitation field.Therefore, larger radial suspension force can be not only generated, and is controlled
The advantages of simply and being easily achieved can be widely applied to flywheel energy storage, various high-speed machine tool spindle motors and canned pump class, centrifugation
The high speed such as machine, compressor, high-speed small-size hard disk drive directly drives field.
Description of the drawings
Fig. 1 is axial arrangement schematic diagram of the present invention.
Fig. 2 is the axial magnetic circuit schematic diagram of the present invention.
Fig. 3 is the arranged on left and right sides motor radial magnetic circuit schematic diagram of the present invention.
Fig. 4 is that arranged on left and right sides rotor cage modle conducting bar U of the present invention is connected schematic diagram.
Fig. 5 is that arranged on left and right sides rotor cage modle conducting bar V of the present invention is connected schematic diagram.
Fig. 6 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 Figures 1 to 6 with left and right sides number of stator slots for 12 slots, suspending windings number of pole-pairs is 1, and torque winding is extremely right
Number is 2, is described in detail for three phase electric machine:
A kind of integrated form five degrees of freedom without bearing asynchronous machine, including stator 1, positioned at the rotor 2 of 1 inner ring of stator, the stator 1
Include left electric machine iron core 3, left annular permanent magnet 4 magnetized in an axial direction, left axial magnetic bearing iron core successively from left to right in an axial direction
5, described every magnetic aluminium ring 6, right axial magnetic bearing iron core 7, right annular permanent magnet 8 magnetized in an axial direction and right electric machine iron core 9
The inner circumferential of left and right electric machine iron core 3,9 is uniformly provided with stator slot, and suspending windings 10 and torque winding are provided in the stator slot
11;The upper and lower suction plate 12,13 of annular is radially distributed on the medial surface of the left and right axial magnetic bearing iron core 5,7, it is described
Be equipped with the magnetic conduction bridge 14 of annular between upper and lower suction plate 12,13, the upper suction plate 12, lower suction plate 13 and magnetic conduction bridge 14 it
Between embedded axial control winding 15;The rotor 2 includes shaft 16, binds round the rotor core 17 for being located at 16 periphery of shaft, described turn
The middle part of sub- iron core 17 put between left and right axial magnetic bearing iron core 5,7 and with upper and lower suction plate 12,13 and magnetic conduction bridge 14
Between there are axial air-gap, the left and right end circumference boss 18 with outward extension of the rotor core 17, the circumference at both ends is convex
Rotor slot 19 is offered on platform 18, and cage modle conducting bar 20 is equipped in the rotor slot 19.
20 number of cage modle conducting bar be even number, cage modle conducting bar 20 use phase separation structure, 20 number of pole-pairs of cage modle conducting bar with described turn
11 number of pole-pairs of square winding is identical.Suspending windings 10 are located at the outside of torque winding 11, the number of pole-pairs of the suspending windings 10 and turn
The number of pole-pairs of square winding 11 differs, i.e., need to only meet PB≠PM, without meeting PB=PM± 1, the suspending windings 10 are by direct current
Source powers.
The left end circumference boss radially aligned of left electric machine iron core 3 and rotor core 17, the right end circle of the rotor core 17
All boss and 9 radially aligned of right electric machine iron core.
The poles N of left annular permanent magnet 4 and right annular permanent magnet 8 are respectively with left axial magnetic bearing iron core 5 and right axle to magnetic axis
It is adjacent to hold iron core 7, the left annular permanent magnet 4 and right annular permanent magnet 8 are made of rare earth permanent-magnetic material.It will be left every magnetic aluminium ring 6
Right magnetic circuit separates, and the left and right sides reduces leakage field without coupling.
Above and below axial air-gap between suction plate 12,13 and rotor core 17 be less than magnetic conduction bridge 14 and rotor core 17 it
Between axial air-gap.
Left and right annular permanent magnet 4,8 provides quiescent biasing magnetic flux 23,24 for motor, and the magnetic circuit of quiescent biasing magnetic flux 23 is:
Magnetic flux is then divided into two parts from the poles N of left annular permanent magnet, by left axial magnetic bearing iron core, respectively by inhaling above and below
Power disk returns to the S of left annular permanent magnet after the axial air-gap of left side by rotor core, left radial air gap, left electric machine iron core
Pole;The magnetic circuit of quiescent biasing magnetic flux 24 is:Magnetic flux from the poles N of right annular permanent magnet, by right axle to control iron core, then
It is divided into two parts, passes through rotor core, right radial air gap, right electricity after the axial air-gap of right side by upper and lower suction plate respectively
Machine iron core returns to the poles S of right annular permanent magnet.
Suspending windings are powered for DC power supply, provide suspension control magnetic flux 25 for left side, magnetic circuit is:On left electric machine iron core
Side, upside radial air gap, rotor, downside radial air gap, left electric machine iron core downside are constituted using stator yoke on the left of left motor
Closed circuit;The magnetic circuit for the suspension control magnetic flux 26 that the suspending windings on right side generate is:Right electric machine iron core upside, upside radial direction gas
Gap, rotor, downside radial air gap, right electric machine iron core downside constitute closed circuit using the stator yoke of right motor;Axial control
Winding processed, which is powered, generates axial suspension control magnetic flux 27,28, which forms between upper and lower suction plate and magnetic conduction bridge and be closed back
Road;The biasing magnetic flux and suspension control magnetic flux of corresponding position interact, generated respectively on left rotor and right rotor it is left,
Right both sides radial direction two-freedom suspending power generates axial single-degree-of-freedom suspending power in the axial direction;Left and right annular permanent magnet is adopted
It is made of the good rare-earth permanent magnet of magnetic property, after suspending windings, torque winding are all made of the electromagnetic coil coiling of well conducting
Paint is invaded to dry.
Torque coils arrangement mode in arranged on left and right sides stator slot is identical, identical as common asynchronous moter;Suspending windings point
ForxDirection controlling winding andyDirection suspension control winding,xDirection controlling winding includes windingL X1~ L X12, according to the direction of Fig. 3
Series connection;yDirection suspension control winding includes windingL Y1~L Y12, connect according to the directions Fig. 3;
The rotor surface of both sides is provided with rotor slot, the cast cage modle conducting bar in rotor slot, and the number of rotor slot and conducting bar is 12;
The coils arrangement mode of the left and right sides is identical.Conducting bar outer layer insulation, by termination portion by its split-phase, due to torque winding
For 3 phase, 4 pole, the conducting bar number of phases and number of poles of rotor 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,,,Short circuit is a phase;And three-phase it
Between mutually insulated.It is arranged in this manner, in the motor operation, suspending windings magnetic field, torque winding magnetic field and permanent magnet
Only have torque winding magnetic field to will produce rotor rotating excitation field in rotor bar in the bias magnetic field three of generation.
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 integrated form five degrees of freedom without bearing asynchronous machine, including stator(1), be located at stator(1)The rotor of inner ring(2),
It is characterized in that:The stator(1)Include left electric machine iron core successively from left to right in an axial direction(3), it is magnetized in an axial direction it is left annular forever
Magnet(4), left axial magnetic bearing iron core(5), every magnetic aluminium ring(6), right axial magnetic bearing iron core(7), magnetized in an axial direction right ring
Shape permanent magnet(8)And right electric machine iron core(9), the left and right electric machine iron core(3,9)Inner circumferential be uniformly provided with stator slot, it is described
Suspending windings are provided in stator slot(10)With torque winding(11);The left and right axial magnetic bearing iron core(5,7)Medial surface
On be radially distributed with annular upper and lower suction plate(12),(13), the upper and lower suction plate(12,13)Between be equipped with annular leading
Magnetic bridge(14), the upper suction plate(12), lower suction plate(13)With magnetic conduction bridge(14)Between embedded axial control winding(15);Institute
State rotor(2)Including shaft(16), hoop be located at shaft(16)The rotor core of periphery(17), the rotor core(17)Middle part
Put in left and right axial magnetic bearing iron core(5,7)Between and with upper and lower suction plate(12,13)And magnetic conduction bridge(14)Between exist
Axial air-gap, the rotor core(17)Left and right end circumference boss with outward extension(18), the circumference boss at both ends
(18)On offer rotor slot(19), the rotor slot(19)It is interior to be equipped with cage modle conducting bar(20);The cage modle conducting bar(20)Number
Mesh is even number, cage modle conducting bar(20)Using phase separation structure, cage modle conducting bar(20)Number of pole-pairs and the torque winding(11)Number of pole-pairs
It is identical;Left electric machine iron core(3)With rotor core(17)Left end circumference boss radially aligned, the rotor core(17)Right end
Circumference boss and right electric machine iron core(9)Radially aligned.
2. a kind of integrated form five degrees of freedom without bearing asynchronous machine according to claim 1, it is characterized in that:It is described suspend around
Group(10)Positioned at torque winding(11)Outside, the suspending windings(10)Number of pole-pairs and torque winding(11)Number of pole-pairs not
Deng the suspending windings(10)It is powered by DC power supply.
3. a kind of integrated form five degrees of freedom without bearing asynchronous machine according to claim 1, it is characterized in that:The left annular
Permanent magnet(4)With right annular permanent magnet(8)The poles N respectively with left axial magnetic bearing iron core(5)With right axial magnetic bearing iron core(7)
It is adjacent, the left annular permanent magnet(4)With right annular permanent magnet(8)It is made of rare earth permanent-magnetic material.
4. a kind of integrated form five degrees of freedom without bearing asynchronous machine according to claim 1, it is characterized in that:It is described upper and lower
Suction plate(12,13)With rotor core(17)Between axial air-gap be less than magnetic conduction bridge(14)With rotor core(17)Between axis
To air gap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810702214.1A CN108696191A (en) | 2018-06-30 | 2018-06-30 | A kind of integrated form five degrees of freedom without bearing asynchronous machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810702214.1A CN108696191A (en) | 2018-06-30 | 2018-06-30 | A kind of integrated form five degrees of freedom without bearing asynchronous machine |
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| Publication Number | Publication Date |
|---|---|
| CN108696191A true CN108696191A (en) | 2018-10-23 |
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|---|---|---|---|
| CN201810702214.1A Pending CN108696191A (en) | 2018-06-30 | 2018-06-30 | A kind of integrated form five degrees of freedom without bearing asynchronous machine |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111022499A (en) * | 2019-12-31 | 2020-04-17 | 淮阴工学院 | Radial large-bearing-capacity hybrid magnetic bearing |
| CN111022498A (en) * | 2019-12-31 | 2020-04-17 | 淮阴工学院 | Radial mixed magnetic bearing without winding |
| CN116317423A (en) * | 2022-12-30 | 2023-06-23 | 淮阴工学院 | Bearingless asynchronous motor transmission system and control method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111022499A (en) * | 2019-12-31 | 2020-04-17 | 淮阴工学院 | Radial large-bearing-capacity hybrid magnetic bearing |
| CN111022498A (en) * | 2019-12-31 | 2020-04-17 | 淮阴工学院 | Radial mixed magnetic bearing without winding |
| CN111022499B (en) * | 2019-12-31 | 2023-09-29 | 淮阴工学院 | Radial large bearing capacity hybrid magnetic bearing |
| CN111022498B (en) * | 2019-12-31 | 2023-09-29 | 淮阴工学院 | Radial winding-free hybrid magnetic bearing |
| CN116317423A (en) * | 2022-12-30 | 2023-06-23 | 淮阴工学院 | Bearingless asynchronous motor transmission system and control method thereof |
| CN116317423B (en) * | 2022-12-30 | 2023-10-20 | 淮阴工学院 | Bearingless asynchronous motor transmission system and control method thereof |
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