CN109347367A - A kind of air gap unipolarity magnetic suspension self bearing motor - Google Patents
A kind of air gap unipolarity magnetic suspension self bearing motor Download PDFInfo
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- CN109347367A CN109347367A CN201811483035.XA CN201811483035A CN109347367A CN 109347367 A CN109347367 A CN 109347367A CN 201811483035 A CN201811483035 A CN 201811483035A CN 109347367 A CN109347367 A CN 109347367A
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Abstract
The present invention provides a kind of air gap unipolarity magnetic suspension self bearing motors, it is made of stator module, rotor or mover assembly, case component, magnetic suspension element is housed on stator magnetic circuit, magnetic suspension magnetic potential source is radial magnetic field, it is same polarity radial magnetic field that magnetic suspension element, which is formed by magnetic field, the same polarity of the magnetic line of force of radial magnetic field is radiated perpendicular to axis direction across motor gas-gap, stator core shell is magnetizer, the present invention is with compact-sized, control is simple, performance indicator is excellent, various working is adapted to, the characteristics of being widely used.
Description
Technical field
The invention belongs to electro-mechanical arts, and in particular to magnetic suspension motor.
Background technique
In order to reduce or eliminate mechanical wear, people have invented magnetic suspension bearing.Magnetic suspension bearing is to utilize to be mounted on to turn
The radial suspension force or axial suspension power that independent magnetic levitation system between axis and rack generates support rotor, by rotor suspension
In aerial, to avoid directly contacting between stator component and rotor part, compared to gas suspension or liquid suspension bearing, it has one
Determine superiority.But at the same time, magnetic suspension bearing also brings new problem, for example its axial length occupied is longer, structure
And relative complex, higher cost etc. is controlled, so that the motor of magnetic suspension bearing support is difficult to widely apply.
For the rotor suspension of motor, people combine the characteristic of the magnetic circuit of motor, have invented from bearing electric motor.From bearing electricity
Motivation is also known as Bearingless motor, gains the name because motor itself has the support function of bearing.Self bearing motor is substantial
Belong to a kind of special shape of magnetic suspension motor.Mainly have from the type of bearing electric motor: (1) ± 2 type of P is from bearing electric motor,
Wherein P is motor pole number, and P ± 2 are magnetic suspension control number of poles, reduces magnetic in another side and the magnetic flux of increase on one side in motor
It is logical, to control motor radial force.(2) for mixed type from bearing electric motor, it is that motor is arranged in side, is arranged in the other side
Hybrid magnetic bearing is equipped with biasing permanent magnet between them, to provide biasing magnetic flux.(3) Lorentzian type is from bearing
Motor, it is to provide the electric from bearing of suspending power by the torque winding offer turning moment and suspending windings being mounted on stator
Machine.(4) axial from bearing electric motor, it is made of two opposite stators and a rotor, a similar double plate motor,
But the control of the drive current amplitudes of each stator depends on the position of rotor here.It is past for radial direction from bearing electric motor
It is past to be used cooperatively with axial magnetic suspension bearing, and for axial direction from bearing electric motor, often make with radial magnetic bearing cooperation
With.In this regard, China Machine Press's in April, 2014 publishes, Switzerland Gerhard Schweitzer, U.S. Eric H.Maslen
366-380 pages of [magnetic suspension bearing --- theoretical, design and the rotating machinery application] write is analyzed.These magnetcisuspensions
The magnetic line of force that float motor is mounted on the formation of every group of magnetic suspension winding on stator will pass through the main air gap of work and suspension magnetic potential
Twice, i.e. air gap magnetic suspension magnetic potential is heteropolarity or ambipolar in source.For diametrical magnetization cascaded suspension winding in stator iron
On core, the circuit of suspension magnetic flux is: A suspension magnetic potential source → stator core → main working gas gap → rotor core → main working gas gap
→ stator core → B suspension magnetic potential source → stator core magnetic yoke → A suspension magnetic potential source.The every magnetic line of force of suspension magnetic flux will pass through
Twice, magnetic potential consumption is big or magnetic potential utilization rate is low for magnetic potential source and main working gas gap.When the rotor rotates, magnetic suspension magnetic flux is to rotor
Iron core remagnetization, this allows for magnetic hystersis loss in rotor, eddy-current loss greatly increases；Tooth socket or salient pole are had for those
Non-homogeneous rotor be easy to produce additional wave force, make to control increasingly complex.These unfavorable factors are eliminated, for magnetic suspension from axis
Bearing motor is particularly important.
Summary of the invention
It is easier the technical problem to be solved by the present invention is seeking a kind of simpler structure, manufacture and maintenance, is more efficient
Magnetic suspension self bearing motor.It is innovating basic structure under the same conditions, for different motor characteristic features, is taking various be directed to
Property or comprehensive technical solution, enable motor, the pot motor suitable for ordinary rotational speed, be adapted to electric rotating
Machine, linear motor, screw motor are adapted to generator, motor etc..This is the main object of the present invention.
In order to achieve the above objectives with solution above-mentioned technical problem, technical solution proposed by the present invention is:
A kind of air gap unipolarity magnetic suspension self bearing motor, is made of stator module, rotor or mover assembly, case component, fixed
There are air gap between sub-component and rotor, the motor is generator or motor, and the motor is alternating current generator, the motor
It is synchronous motor or asynchronous machine, the motor is rotating electric machine or linear motor or screw motor, and the linear motor is fixed
Son is the motor that can be interchanged with mover, and the stator module includes stator core and its magnetic pole, magnetic yoke, and stator main winding is determined
Sub- magnetic suspension element, the motor stator main winding is using single-phase or multiphase alternating power supply, the stator magnet levitated element
It is the mixed magnetic suspension element of permanent magnet or electromagnetism winding or both, the rotor assembly includes rotor core and its magnetic pole, magnetic
Yoke and armature spindle, auxiliary bearing, the casing include stator core shell, left end cap or upper end cover, right end cap or lower cover, institute
Stating armature spindle is the hollow shaft made of magnetizer or non-magnetizer or solid shafting, the magnetic suspension member on the stator magnetic circuit
Part, the magnetic line of force of the magnetic pole in each magnetic potential source are same polarity radial battery, magnetic suspension member on the direction for corresponding to motor gas-gap
It is same polarity radial radiation magnetic field that part, which is formed by magnetic field, and the same polarity of the magnetic line of force in axial magnetic magnetic field is perpendicular to motor shaft
For the radiation of line direction across motor gas-gap, the size and Orientation of each suspending windings magnetic flux by controlling motor increases magnetic force on one side
And magnetic force is reduced in another side, motor radial force is controlled, the stator core shell is magnetizer, the magnetic flux warp in magnetic suspension magnetic field
Cross stator core shell.
The technical characteristic of the technical solution shows the magnetic suspension self bearing motor while including 1) magnetic suspension component placement position
It sets on stator.2) magnetic line of force of the magnetic pole of magnetic suspension element is radial radiation on the direction for corresponding to motor gas-gap.3) gas
Gap magnetic suspension magnetic field is same polarity (unipolarity).It is same just because of the position of magnetic suspension component placement, excitation direction, polarity of the magnetic field
When it is different from existing magnetic suspension self bearing motor so that suspension magnetic flux path is different, various new technical sides may be implemented with this
Case, so that the technical performance index of self bearing motor and economical operation index generate different results.
So-called radial battery refer to the pole center line in every magnetic suspension magnetic potential source be according to motor it is radial or with motor diameter
To being placed in parallel.So-called axial excitation refers to that the pole center line in every magnetic suspension magnetic potential source is according to motor axial direction or and motor
Axially it is placed in parallel；
The monopole magnetic potential refers to that the magnetic line of force of magnetic suspension magnetic potential by a certain space or object is same polarity, same direction.
Monopole is also known as homopolarity, and unipolarity is also known as same polarity or like pole.
The unipolarity radiation field refers to that the unipolarity beam of magnetic line of force of magnetic potential gathers or together in the same direction in a certain aerial cross sectional
Pass through to diverging or cocurrent and parallel.Such as: the magnetic line of force gather along a certain circular cross-section to center of circle direction or from inner circle radially to
Outer circle diverging.For another example: magnetic line of force same polarity passes through a rectangular section air gap or coil cross section air gap etc..
In the program, the magnetic suspension magnetic circuit for rotating electric machine is: magnetic suspension element → stator core shell → two side ends
Lid → two sides end cap and two sides magnetic conduction between centers or additional air gap → two sides magnetic conductive axis or two between the rotor core exterior surface of two sides
Side rotor core → main air gap → two sides stator core → stator yoke → magnetic suspension the element of two sides work.Every magnetic suspension magnetic flux
Magnetic force only passes through main air gap and suspension magnetic potential source is primary.The magnetic field magnetic circuit of stator main winding is in stator as ordinary motor
On the magnetic loop of the main main air gap → stator core of air gap → rotor core → work of iron core → work.
Using each magnetic suspension element being mounted on stator in the program, the radial direction, unipolarity, radiative collision of air gap are formed
, have the advantage that 1) single pole magnetic field can make air-gap field more evenly；Existing gas when avoiding bipolarity or multipolarity magnetic field
Gap interelectrode magnetic leakage.2) radial radiation magnetic field can produce poly- magnetic effect, reduce excitation magnetic potential supply.3) bipolarity or more is eliminated
Polarity magnetic potential is when rotor rotates, the phenomenon that magnetic flux is to rotor core remagnetization, so that magnetic hystersis loss, vortex damage in rotor
Consumption greatly reduces.4) unipolarity magnetic potential can reduce adds for what those non-homogeneous rotors with tooth socket or salient pole were easy to produce
Wave force.5) magnetic suspension magnetic flux passes through stator core shell magnetizer, avoids the magnetic line of force and passes perpendicularly through stator silicon steel plate plane,
The magnetic resistance that the magnetic line of force passes perpendicularly through existing additional air gap when stator core magnet steel plate plane is eliminated, magnetic potential loss is reduced,
Reduce stator iron loss.6) the every magnetic line of force only passes through main air gap and suspension magnetic potential source is primary, can reduce magnetic potential supply or improve magnetic
Gesture utilization rate.7) magnetic suspension winding is mounted on stator, can greatly reduce motor axial dimension, improves stock utilization.8) magnetic
Suspending windings are mounted on stator, facilitate cooling heat dissipation etc..The above advantage is greatly improved the energy index of motor, can
Manufacture into heavy-duty motor.
In the program, when armature spindle uses permeability magnetic material, rotor core can be used same material equivalent substitute, shaft with
Rotor core can integration.
In the program, when magnetic suspension element is formed using more than one piece dispersion spelling group, answered between two pieces magnetic suspension elements on either side
There are air-gap or filling non-magnet materials, prevent magnetic suspension element from leakage field.
In the program, when using more than one piece magnetic suspension element dispersed placement, magnetic suspension elements centerline and stator can adjust
Relative position between main winding center line obtains the smallest armature-reaction.Or add between the air-gap of two pieces magnetic suspension element
Auxiliary magnetic pole is filled, motor performance is improved.
In the program, the magnetic suspension element can be electrical excitation magnetic suspension winding or electrical excitation magnetic suspension winding and permanent magnetism
The magnetic suspension element of body mixing, when using electrical excitation magnetic suspension winding, space is equipped with and stator iron in electrical excitation magnetic suspension winding
The leading pole of core one.Magnetic suspension winding also may be mounted in the slot of main winding.
In the program, rotor moment of inertia can be reduced using hollow shaft, be especially conducive to start in high-speed motor, transport
Row.
In the program, when using hollow shaft, spiral can be processed equipped with ball-screw or on inner wall of hollow shaft in hollow shaft
Slot, in screw rod can be housed.Ball-screw or the exportable straight line of screw rod or screw.
In the program, when magnetic suspension element and main winding when the different-diameter range arrangement in stator, magnetic suspension magnetic circuit
Path is different from the path of stator main winding magnetic circuit, and magnetic suspension magnetic circuit will pass through stator core shell, and stator main winding magnetic circuit is not
By stator core shell.When same diameter range is arranged in stator for magnetic suspension element and main winding, magnetic suspension magnetic circuit
Path is identical as the path of stator main winding magnetic circuit, and the two magnetic circuit all passes through stator core shell.
In the program, stator, rotor core structure include salient pole type, hidden pole type, hybrid etc..
In the program, rotor core can be radial stacked, be also possible to punching axial direction laminated type.
In the program, excitation winding can be set on stator or rotor, excitation winding can be unipolarity or multipolarity.
Excitation element is added in magnetic circuit, establishes excitation field, is necessary for generator；For motor, excitation field meeting
The interference performance to external magnetic field (such as voltage fluctuation) is improved, the job stability of motor is improved；Excitation field provides higher
Magnetic field working range, the control of motor is easier, overload capacity is stronger.
In the program, for motor, in order to improve starting performance, existing raising synchronous motor starting energy can be taken
The various mature technology schemes of power, such as: device mouse cage starts winding etc. in rotor core.
In the program, in order to solve the problems, such as the centrifugal force of high-speed motor, the related art scheme of existing maturation be can be used.
In the program, in order to solve the problems, such as cooling, the related art scheme of existing maturation be can be used.
A kind of above-mentioned air gap unipolarity magnetic suspension self bearing motor, alternative technology scheme is, described in stator
The magnetic suspension element being equipped on magnetic circuit, the magnetic line of force of the magnetic pole in each magnetic potential source are homopolarities on the direction for corresponding to motor gas-gap
Property radial battery, refer to that magnetic suspension element is mounted on the magnetic circuit on the inside of stator core shell between stator core magnetic yoke, respectively
The same polar magnetic field magnetic line for the magnetic pole that magnetic suspension element generates is radiated perpendicular to electrical axis direction across motor gas-gap,
Magnetic suspension element number of poles=P ± 2, wherein P be motor pole number, by control motor each suspending windings magnetic flux size and
Direction increases magnetic force on one side and reduces magnetic force in another side, controls motor radial force, and stator core shell is magnetizer, left and right
End cap or upper and lower end cap are magnetizers, and the magnetic flux in magnetic suspension magnetic field is stamped by stator core shell and two sides end cap, two side ends
A part of spin crossover area and rotor core or magnetic conductive axis sliding contact cooperate, and constitute a part of magnetic circuit.Each magnetic loop is led
The area of section size of magnet should ensure that its magnetic field will not supersaturation.
In the program, magnetic suspension magnetic loop is magnetizer by stator core shell, avoids the magnetic line of force and passes perpendicularly through and determines
Sub- silicon steel plate plane eliminates the magnetic line of force and passes perpendicularly through existing additional air gap magnetic resistance when stator core magnet steel plate plane, reduces
Magnetic potential of air gap loss, reduces stator iron loss.The air gap monopole magnetic suspension self bearing motor related to this of other types
Magnetic circuit with it is above-mentioned similar.
A kind of above-mentioned air gap unipolarity magnetic suspension self bearing motor, alternative technology scheme is, described in stator
The magnetic suspension element being equipped on magnetic circuit, the magnetic line of force of the magnetic pole in each magnetic potential source are homopolarities on the direction for corresponding to motor gas-gap
Property radial battery, refer to magnetic suspension element installation stator core shell on the inside of and stator core magnetic yoke between magnetic circuit on, each magnetic
The same polar magnetic field magnetic line for the magnetic pole that levitated element generates is radiated perpendicular to electrical axis direction across motor gas-gap, institute
State that magnetic suspension element number of poles is equal with motor main winding number of poles, by the magnetic flux size and the side that control each magnetic suspension element of motor
To, on one side increase magnetic force and another side reduce magnetic force, control motor radial force, stator core shell is magnetizer, left and right end
Lid or up and down end cap are magnetizers, and the magnetic flux in magnetic suspension magnetic field is stamped one by stator core shell and two sides end cap, two side ends
Part spin crossover area and rotor core or magnetic conductive axis sliding contact cooperate, and constitute a part of magnetic circuit.
A kind of above-mentioned air gap unipolarity magnetic suspension self bearing motor, improved technical solution is, in magnetic suspension magnetic circuit
On circuit, it is filled with ferrofluid in corresponding existing spatial joint clearance or air gap, stator, rotor tooth socket or stator, rotor are recessed
It lacks in space and is filled completely with non-magnet material.Ferrofluid has the denominator of ferromagnetic material and fluid, is superparamagnetism stream
Body material, the far super general paramagnetic material of magnetic susceptibility.Ferrofluid is inserted in air gap, is on the one hand had and is lowered magnetic resistance, and magnetic potential is reduced
Supply effect, on the other hand has lubrication and sealing function.
A kind of above-mentioned air gap unipolarity magnetic suspension self bearing motor, alternative technology scheme are that the motor is
A kind of synchronous reluctance formula motor, stator and rotor are salient pole type or hidden pole type or hybrid, rotor magnetic pole be provided with mouse cage start around
Group.In the program, rotor structure includes outer reaction equation, interior reaction equation, inside and outside reaction equation etc..In the program, in magnetic suspension magnetic circuit
Circuit on, be filled with ferrofluid in corresponding existing spatial joint clearance or air gap, in the corresponding stator of main air gap that works, turn
It is filled in sub- tooth socket or at notch with non-magnet material full.When stator main winding accesses high frequency electric source, it can be used for high-speed motor.
A kind of above-mentioned air gap unipolarity magnetic suspension self bearing motor, alternative technology scheme are that the motor is
A kind of switched reluctance motor, stator and rotor are salient pole type or hidden pole type or hybrid, and stator winding accesses alternation Switching Power Supply.
In the program, rotor structure includes outer reaction equation, interior reaction equation, inside and outside reaction equation etc..In the program, in returning for magnetic suspension magnetic circuit
On the road, it is filled with ferrofluid in corresponding existing spatial joint clearance or air gap, in the corresponding stator of main air gap, rotor tooth of working
It is filled in slot or at notch with non-magnet material full.It can be used for high-speed motor.
A kind of above-mentioned air gap unipolarity magnetic suspension self bearing motor, alternative technology scheme are that the motor is
A kind of asynchronous system motor, asynchronous motor rotor are the Wound-rotor type or cage rotor for being in series with additional resistance.
A kind of above-mentioned air gap unipolarity magnetic suspension self bearing motor, alternative technology scheme are that the motor is
A kind of electromagnetic deceleration formula motor, stator and rotor are non-salient poles or hybrid, and slot, and stator and rotor are all provided on stator and rotor iron core
Opening slot number meets following relationship: rotor openings slot number=stator openings slot number ± stator winding number of pole-pairs or rotor openings slot number
=stator openings slot number ± air-gap permeance wave maximum frequency of occurrence.In the program, due to electromagnetic deceleration formula motor revolutional slip compared with
The material of high magnetic permeability, high resistivity can be used in height, rotor magnetic circuit material, for example, being turned using amorphous ferromagnetic material with reducing
Sub- eddy-current loss.
A kind of above-mentioned air gap unipolarity magnetic suspension is from bearing electromagnetic deceleration formula synchronous motor, improved technical solution,
On the circuit of magnetic suspension magnetic circuit, it is filled with ferrofluid in corresponding existing spatial joint clearance or air gap, in the main air gap pair that works
Stator, the rotor tooth socket answered are interior to be filled completely with non-magnet material.In the program, ferrofluid is inserted in air gap, is on the one hand had
There is attenuating magnetic resistance, reduces magnetic potential supply effect, on the other hand there is lubrication and sealing function.
A kind of above-mentioned air gap unipolarity magnetic suspension self bearing motor, alternative technology scheme are that the motor is
A kind of linear motor, the linear motor are single or double linear stator motor.The synchronous reluctance electricity of rotated versions
Machine, switched reluctance machines, slowspeed machine etc. can evolve into linear motor.
A kind of above-mentioned air gap unipolarity magnetic suspension self bearing motor, alternative technology scheme is the magnetcisuspension
The rotor of floating self bearing motor can be used as energy storage, release energy motor use using high-strength magnetic material or after carrying out reinforcement protection, when
When stator main winding inputs alternating current, motor stores energy as motor running, rotor.When stator main winding disconnects power supply
And when accessing load, motor is run as generator, and motor exports electric energy.The motor as energy storage, release can motor when, motor
Two shaft ends can install repulsion formula axial thrust magnetic suspension bearing additional, and axial thrust magnetic suspension bearing and main magnetic circuit will carry out magnetic
Isolation；Entire electric machine casing can be sealed processing, can be evacuated in shell.
A kind of above-mentioned air gap unipolarity magnetic suspension self bearing motor, alternative technology scheme be, when removing stator
When main winding, motor can be used as magnetic suspension bearing use.
A kind of above-mentioned air gap unipolarity magnetic suspension self bearing motor, alternative technology scheme is the magnetic suspension
Self bearing motor is screw motor, and the screw motor is developed by above-mentioned various rotating electric machines, and the auxiliary bearing is
Double freedom bearing, double freedom bearing holder (housing, cover) is outer mounted in armature spindle or is sleeved on outside rotor core.When being sleeved on outside rotor core,
Rotor core is to load in the recess of rotor core or the tooth socket of magnetic pole non magnetic resistance on salient pole or magnetic pole there are when tooth socket
Grind material.The stator and mover (rotor) magnetic pole, stator winding respectively between stator and mover on the basis of the central diameter of air gap,
All by clockwise or being all reversed into the essentially identical angle of helix angle size, spiral liter around its axis counterclockwise
Angle is positive and negative 5 ° -85 °, forms magnetic pole of the stator and mover magnetic pole, main winding, the screw arrangement for starting winding, magnetic pole of the stator and dynamic
Rake angle or helix angle size difference between sub- magnetic pole are no more than positive and negative 5 °, a kind of specific choosing of motor helical lift angle size
It selects and is determined according to the factors such as required axial thrust and torque magnitude ratio；Motor stator or mover length are according to being interior mover
Or depending on outer mover mode, long mover or short mover mode and the axial stroke of needs, in the axial displacement of constraint mover
Under the conditions of, mover can do in a circumferential direction the continuous forward and reverse rotation of 360 ° of ranges, while generating and pushing away according to current direction
Power；In the case where constraining direction of rotation displacement condition, mover can do linear reciprocating motion according to current direction；Releasing axial displacement about
Under conditions of beam and direction of rotation displacement constraint, mover can do forward-reverse spiral movement according to current direction or the magnetic pole hand of spiral,
Motor power uses the alternating source of direct-current switch power supply or two-phase or more.
When the magnetic suspension element of above-mentioned screw motor is mounted between stator core and magnetic conduction stator casing, magnetic suspension element
Axial arrangement can be parallel to, can also as main winding screw arrangement.
It is above-mentioned to be both suitable for being also suitable for from bearing synchronous magnetic resistance motor from bearing switching magnetic-resistance electricity from bearing screw motor
Machine.In the program on the circuit of magnetic suspension magnetic circuit, ferrofluid is filled in corresponding existing spatial joint clearance or air gap.In work
Make to be filled in the corresponding stator of main air gap, rotor tooth socket and concave-convex space with non-magnet material full.
In above scheme, since screw motor axially has thrust, effect may replace axial suspension bearing.
Invention is further described in detail with reference to the accompanying drawings and detailed description.
Detailed description of the invention:
Fig. 1 is a kind of axial cutting structural schematic diagram of air gap unipolarity magnetic suspension of the invention from bearing synchronous motor.
A kind of air gap unipolarity magnetic suspension that Fig. 2 is Fig. 1 is from the radial cutting structural schematic diagram of bearing synchronous motor.
Specific embodiment
Attached drawing 1, attached drawing 2 are a kind of structural representation of air gap unipolarity magnetic suspension of the invention from bearing synchronous motor
Figure.The motor is made of stator module, rotor assembly, case component, and motor stator main winding uses three-phase alternating source.Stator
There are air gaps 30 between component and rotor assembly.Stator module includes stator core 12 and its magnetic pole 17, magnetic yoke 18 and stator master
Winding 15, stator excitation permanent magnet 11, stator magnet suspending windings 16；Excitation permanent magnet 11 is mounted on the stator core of stator cage
On magnetic circuit between 12 10 inside of shell and stator core magnetic yoke 18, magnetic suspension winding 16 is sleeved on stator excitation winding 11
On, form mixing magnetic potential.Rotor assembly includes rotor core 22, rotor rim 21 and rotor hollow shaft 20, auxiliary bearing 24, is turned
Sub- magnetic yoke 21 uses amorphous ferromagnetic material, and to reduce rotor eddy current loss, rotor core 22 is equipped with mouse cage and starts winding 25, with
Improve starting capability.Rotor inner circumferential is provided with magnetic pole magnet isolation tank 26.Casing includes stator core shell 10, left end cap 14, right end cap
13, stator core shell 10 and end cap 14,13 are all magnetizers.Rotor hollow shaft 20 is the hollow shaft made of non-magnetizer,
The excitation magnetic source of excitation permanent magnet 11 and magnetic suspension winding 16 on stator magnetic circuit is same polarity radial battery, each excitation permanent magnet
11 and magnetic suspension winding 16 to be formed by excitation field be same polarity radial radiation magnetic field, radial battery magnetic field and magnetic suspension magnetic field
The same polarity of the magnetic line of force perpendicular to electrical axis direction radiate across motor gas-gap 30.The excitation of excitation field and suspension magnetic
Magnetic flux passes through along axial direction to two sides by stator core shell 10, and by two sides end cap 14,13.Left and right end cap 14,13 with turn
Sub- 21 sliding contact of iron core magnetic yoke cooperation.On the circuit of magnetic excitation circuit, it is filled in corresponding existing spatial joint clearance or air gap
Ferrofluid 31, ferrofluid are inserted in air gap, are on the one hand had and are lowered magnetic resistance, and magnetic potential supply effect, another party's mask are reduced
There are lubrication and sealing function.In the embodiment, the excitation and magnetic suspension flux circuit of motor are: excitation element 11(magnetic suspension member
Part 16) → 10 → two sides of stator core shell end cap 14,13 → two sides end cap 14,13 and 21 outer surface of two sides rotor core magnetic yoke
Between additional air gap in 31 → two sides of ferrofluid, 21 → two sides of rotor core magnetic yoke work main 30 → two sides of air gap stator iron
Core 12 → stator yoke, 18 → excitation element 11(magnetic suspension element 16).The excitation and magnetic suspension magnetic flux shown in Fig. 1 edge respectively
A, b, c, d loop works, the every magnetic flux magnetic line of force only passes through the main air gap of work and magnetic potential source is primary, advantageously reduce magnetic potential confession
Give or improve magnetic potential utilization rate.The magnetic flux of stator main winding 15 is along the main 30 → rotor core of air gap of stator core 12 → work
It works on the magnetic loop of the main 30 → stator core of air gap 12 of 22 → work.
In the embodiment, according to load situation of change, the size and Orientation of 16 magnetic flux of magnetic suspension winding is adjusted, motor can be made
Rotor suspension operation.
Although having been combined preferred embodiment describes the device of the invention, the present invention is not limited to as described herein
Concrete form, on the contrary, its object is to cover naturally fall into the scope of the invention that described claims limit
Various alternatives, remodeling, various characteristic elements recombinant and derivative Combination nova and equivalents.
Claims (10)
1. a kind of air gap unipolarity magnetic suspension self bearing motor, is made of stator module, rotor or mover assembly, case component,
There are air gap between stator module and rotor, the motor is generator or motor, and the motor is alternating current generator, the electricity
Machine is synchronous motor or asynchronous machine, and the motor is rotating electric machine or linear motor or screw motor, and the linear motor is
The motor that stator and mover can be interchanged, the stator module include stator core and its magnetic pole, magnetic yoke, and stator main winding is determined
Sub- magnetic suspension element, the motor stator main winding is using single-phase or multiphase alternating power supply, the stator magnet levitated element
It is the mixed magnetic suspension element of permanent magnet or electromagnetism winding or both, the rotor assembly includes rotor core and its magnetic pole, magnetic
Yoke and armature spindle, auxiliary bearing, the casing include stator core shell, left end cap or upper end cover, right end cap or lower cover, institute
Stating armature spindle is the hollow shaft made of magnetizer or non-magnetizer or solid shafting, it is characterised in that: on the stator magnetic circuit
Magnetic suspension element, the magnetic line of force of the magnetic pole in each magnetic potential source is that same polarity is radially encouraged on the direction for corresponding to motor gas-gap
Magnetic, it is same polarity radial radiation magnetic field, the same polarity of the magnetic line of force in axial magnetic magnetic field that magnetic suspension element, which is formed by magnetic field,
Perpendicular to the radiation of electrical axis direction across motor gas-gap, by the magnetic flux size and the side that control each magnetic suspension element of motor
To, on one side increase magnetic force and another side reduce magnetic force, control motor radial force, the stator core shell is magnetizer, magnetic
The magnetic flux of suspension magnetic passes through stator core shell.
2. a kind of air gap unipolarity magnetic suspension self bearing motor according to claim 1, it is characterised in that: described in stator
The magnetic suspension element being equipped on magnetic circuit, the magnetic line of force of the magnetic pole in each magnetic potential source are homopolarities on the direction for corresponding to motor gas-gap
Property radial battery, refer to that magnetic suspension element is mounted on the magnetic circuit on the inside of stator core shell between stator core magnetic yoke, respectively
The same polar magnetic field magnetic line for the magnetic pole that magnetic suspension element generates is radiated perpendicular to electrical axis direction across motor gas-gap,
Magnetic suspension element number of poles=P ± 2, wherein P is motor pole number, the magnetic flux size of each magnetic suspension element by controlling motor
And direction, increase magnetic force on one side and reduce magnetic force in another side, control motor radial force, stator core shell is magnetizer, left
Right end cap or upper and lower end cap are magnetizers, and the magnetic flux in magnetic suspension magnetic field passes through stator core shell and two sides end cap, two sides end cap
Some spin crossover area and rotor core or magnetic conductive axis sliding contact cooperate, and constitute a part of magnetic circuit.
3. a kind of air gap unipolarity magnetic suspension self bearing motor according to claim 1, it is characterised in that: described in stator
The magnetic suspension element being equipped on magnetic circuit, the magnetic line of force of the magnetic pole in each magnetic potential source are homopolarities on the direction for corresponding to motor gas-gap
Property radial battery, refer to that magnetic suspension element is mounted on the magnetic circuit on the inside of stator core shell between stator core magnetic yoke, respectively
The same polar magnetic field magnetic line for the magnetic pole that magnetic suspension element generates is radiated perpendicular to electrical axis direction across motor gas-gap,
The magnetic suspension element number of poles is identical as motor main winding number of poles, by control motor each magnetic suspension element magnetic flux size and
Direction increases magnetic force on one side and reduces magnetic force in another side, controls motor radial force, and stator core shell is magnetizer, left and right
End cap or upper and lower end cap are magnetizers, and the magnetic flux in magnetic suspension magnetic field is stamped by stator core shell and two sides end cap, two side ends
A part of spin crossover area and rotor core or magnetic conductive axis sliding contact cooperate, and constitute a part of magnetic circuit.
4. a kind of air gap unipolarity magnetic suspension self bearing motor according to claim 1, it is characterised in that: in magnetic suspension magnetic
On the circuit on road, it is filled with ferrofluid in corresponding existing spatial joint clearance or air gap, stator, rotor tooth socket or stator turn
It is filled completely in sub- notch space with non-magnet material.
5. a kind of according to claim 1, air gap unipolarity magnetic suspension self bearing motor described in 2,3,4, it is characterised in that: described
Motor is a kind of synchronous reluctance formula motor, and stator and rotor are salient pole type or hidden pole type or hybrid, and rotor magnetic pole is provided with mouse cage and rises
Dynamic winding.
6. a kind of according to claim 1, air gap unipolarity magnetic suspension self bearing motor described in 2,3,4, it is characterised in that: described
Motor is a kind of switched reluctance motor, and stator and rotor are salient pole type or hidden pole type or hybrid, and stator winding accesses alternation switch
Power supply.
7. a kind of according to claim 1, air gap unipolarity magnetic suspension self bearing motor described in 2,3,4, it is characterised in that: described
Motor is a kind of asynchronous system motor, and asynchronous motor rotor is the Wound-rotor type or cage rotor for being in series with additional resistance.
8. a kind of according to claim 1, air gap unipolarity magnetic suspension self bearing motor described in 2,3,4, it is characterised in that: described
Motor is a kind of linear motor, and the linear motor is single or double linear stator motor.
9. a kind of according to claim 1, air gap unipolarity magnetic suspension self bearing motor described in 2,3,4, it is characterised in that: described
Motor is a kind of electromagnetic deceleration formula motor, and stator and rotor are hidden pole types or hybrid, and slot is all provided on stator and rotor iron core, and
Stator and rotor opening slot number meets following relationship: rotor openings slot number=stator openings slot number ± stator winding number of pole-pairs or rotor
Be open slot number=stator openings slot number ± air-gap permeance wave maximum frequency of occurrence.
10. a kind of according to claim 1, air gap unipolarity magnetic suspension self bearing motor described in 2,3,4, it is characterised in that: institute
Stating self bearing motor is screw motor, the stator and mover or rotor magnetic pole, stator main winding, rotor starting winding respectively with
Between stator and mover on the basis of the central diameter of air gap, all by clockwise or being all reversed into a spiral shell around its axis counterclockwise
The essentially identical angle of lift angle size is revolved, helix angle is positive and negative 5 ° -85 °, forms magnetic pole of the stator and mover magnetic pole, main winding
With starting winding screw arrangement, rake angle or helix angle size between magnetic pole of the stator and mover pole center line differ and do not surpass
Positive and negative 5 ° are crossed, axial thrust and torque magnitude ratio required for a kind of specific selection gist of motor helical lift angle size turn
Speed, power, power factor, efficiency factor determine；Motor stator or mover length are according to being interior mover or outer mover mode, length
Depending on mover or short mover mode and the axial stroke of needs, under the conditions of constraining the axial displacement of mover, mover can foundation
Current direction, does the continuous forward and reverse rotation of 360 ° of ranges in a circumferential direction, while generating thrust；In constraint direction of rotation position
Under the conditions of shifting, mover can do linear reciprocating motion according to current direction；Releasing axial displacement constraint and direction of rotation displacement about
Under conditions of beam, mover can do forward-reverse spiral movement according to current direction or the magnetic pole hand of spiral, and motor power is opened using direct current
The alternating source of powered-down source or two-phase or more.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811483035.XA CN109347367A (en) | 2018-12-05 | 2018-12-05 | A kind of air gap unipolarity magnetic suspension self bearing motor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811483035.XA CN109347367A (en) | 2018-12-05 | 2018-12-05 | A kind of air gap unipolarity magnetic suspension self bearing motor |
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| CN109347367A true CN109347367A (en) | 2019-02-15 |
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ID=65297492
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| CN201811483035.XA Withdrawn CN109347367A (en) | 2018-12-05 | 2018-12-05 | A kind of air gap unipolarity magnetic suspension self bearing motor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112648289A (en) * | 2020-12-14 | 2021-04-13 | 北京航空航天大学 | Radial magnetic suspension type rotor bearing for superconducting claw-pole motor |
-
2018
- 2018-12-05 CN CN201811483035.XA patent/CN109347367A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112648289A (en) * | 2020-12-14 | 2021-04-13 | 北京航空航天大学 | Radial magnetic suspension type rotor bearing for superconducting claw-pole motor |
| CN112648289B (en) * | 2020-12-14 | 2021-09-28 | 北京航空航天大学 | Radial magnetic suspension type rotor bearing for superconducting claw-pole motor |
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Application publication date: 20190215 |