CN104967361B - Electromagnetic type bearing-free double salient-pole electric machine and its control method - Google Patents
Electromagnetic type bearing-free double salient-pole electric machine and its control method Download PDFInfo
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- CN104967361B CN104967361B CN201510360500.0A CN201510360500A CN104967361B CN 104967361 B CN104967361 B CN 104967361B CN 201510360500 A CN201510360500 A CN 201510360500A CN 104967361 B CN104967361 B CN 104967361B
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Abstract
The invention discloses electromagnetic type bearing-free double salient-pole electric machine and its control method, belong to the technical field of bearing-free motor.Motor includes：Stator core, rotor core, armature winding, Exciting Windings for Transverse Differential Protection, suspending windings, rotor core includes several rotor tooth poles, stator core includes the several stator poles being made up of some stator tooth poles, gap between adjacent stator pole forms stator slot, stator tooth extremely on the armature coil that is wound be connected by its linkage flux change rule identical principle after form armature winding, embedded with the magnet exciting coil and suspended coil being wound in stator poles in stator slot, the magnet exciting coil being wound in each stator poles forms Exciting Windings for Transverse Differential Protection after being sequentially connected, the α direction of principal axis suspending windings for producing orthogonal suspension magnetic are formed respectively after suspended coil connection in spatial radial relative position, β direction of principal axis suspending windings.Non-linear coupling problem is avoided using independent levitation winding control suspending power, individually controls levitating current and exciting current to realize the mutual decoupling between motor output and suspension.
Description
Technical field
The invention discloses electromagnetic type bearing-free double salient-pole electric machine and its control method, belong to the skill of bearing-free salient-pole machine
Art field.
Background technology
Switched reluctance machines rotor is salient-pole structure, and concentratred winding is wound with stator, does not both have permanent magnet on rotor
There is no winding yet, it is simple in construction firm, it is easy to maintenance.Therefore there is switched reluctance machines hot environment and high-speed cruising to adapt to
Property.But high rotating speed inevitably causes the problems such as mechanical bearing heating and abrasion, shortens bearing life, is influenceing motor just
Often operating, the reliability of system is reduced, dramatically weaken the advantage of the suitable high-speed cruising of reluctance motor.
Compared to mechanical bearing, magnetic bearing can realize the contactless operation of stator and rotor, possess no mechanical wear, without lubrication,
Control accuracy is high, service life is long, maintenance cost is small, bears the advantages that rotating speed is high.But magnetic bearing is respectively both needed to levitating current
Individually to control, required power device is more, and control difficulty is big；Magnetic bearing occupies separate space, and system architecture is complex, into
This height, power density are low；Simultaneous Switching reluctance motor rotor interpolar radial electromagnetic force is larger, and pulsating feature is presented, seriously
Influence magnetic suspension system stable operation.
Bearing-free motor is by the integrated New-type electric machine of magnetic bearing function and driving or generating function, has space profit
It is high with rate, it is compact-sized the features such as, by adjusting levitating current, active control motor interpolar radial electromagnetic force, improve motor
High-speed cruising reliability, improve power density and efficiency.Bearing-free motor type mainly has induction-type bearingless motor, bearing-free
Permagnetic synchronous motor, and bearing-free reluctance motor.Induction-type bearingless motor is simple in construction with its, and the features such as being easy to weak magnetic turns into
The bearing-free motor type studied earliest, but the control of its suspending power and direct torque intercouple, it is difficult to realize stable at a high speed
Operation.Bearing-free permanent magnet synchronous motor power density is high, efficiency high, but on the one hand in the adverse circumstances such as high temperature, permanent magnet
Irreversible demagnetization easily occurs, influences motor performance；On the other hand because permanent magnet is located on rotor, high-speed cruising easily causes
Permanent magnetism fragmentation body such as comes off at the accident, harm system safety.Bearing-free switch reluctance motor inherits the letter of switched reluctance machines structure
Single reliable advantage, it is particularly suitable in the severe occasion operation such as high temperature, while the suspension function of its own avoids interpolar radially
Electromagnetic force is disturbed, and can realize high-speed stable running.But bearing-free switch reluctance motor torque and suspending power exist it is non-linear
Coupling, the system of adding realize difficulty, such as to authorize patent of invention CN101546978B to disclose a kind of shaftless based on double winding
The control method of bearing switch reluctance motor, this method can realize non-bearing switch reluctance motor complete-period electrification, compensate for week
Phase property timesharing generating limitation, but levitating current needs to be adjusted in real time according to armature supply change, between winding magnetic field
Intercouple, control algolithm is complex；Power device required for another aspect is more, reduces system reliability, increase
Cost.
The content of the invention
The technical problems to be solved by the invention are the deficiencies for above-mentioned background technology, there is provided electromagnetic type bearing-free is double
Salient-pole machine and its control method, motor realize that the excitation of motor eliminates permanent magnetism using the Exciting Windings for Transverse Differential Protection being wound in stator poles
Body provides bias magnetic field to simplify structure, and Non-linear coupling problem is avoided using independent levitation winding control suspending power,
Control method individually controls levitating current and exciting current, can conveniently realize motor suspension control and output control, realize
Motor exports the mutual decoupling between suspension, solves existing bearing-free motor and is difficult to high-speed stable running, permanent magnet demagnetization
Motor performance is caused to decline, excitation couple with the control that suspends causes control method complexity and the technology of the more power device of dependence is asked
Topic.
The present invention adopts the following technical scheme that for achieving the above object：
Electromagnetic type bearing-free double salient-pole electric machine uses the double-salient-pole structure of 12/8 pole, including：Stator core, rotor core,
Armature winding, Exciting Windings for Transverse Differential Protection, suspending windings, rotor core include several rotor tooth poles, and stator core is included by some stator tooths
Several stator poles that pole is formed, the gap between adjacent stator pole form stator slot, stator tooth extremely on the armature coil that is wound with by
Its linkage flux change rule identical principle forms armature winding after being connected, in the stator poles that three stator tooth poles are formed it is embedding around
There is magnet exciting coil, often set magnet exciting coil winding method is identical and often covering magnet exciting coil, there is the first connection end and second to connect respectively
End, is connected with the second connection end of first set magnet exciting coil with the second connection end of clockwise second set of magnet exciting coil,
First connection end of first connection end of second set of magnet exciting coil again with its clockwise 3rd set of magnet exciting coil is connected, the
Second connection end of the second connection end of three sets of magnet exciting coils again with its clockwise 4th set of magnet exciting coil is connected, and is owned
Magnet exciting coil is followed in series to form Exciting Windings for Transverse Differential Protection, it is embedding in the stator poles that three stator tooth poles are formed to be wound with suspended coil, space footpath
α direction of principal axis suspending windings and the β axle sides for producing orthogonal suspension magnetic are formed after to the suspended coil connection in relative position respectively
To suspending windings.
As the further prioritization scheme of the electromagnetic type bearing-free double salient-pole electric machine, rotor core is unshakable in one's determination folded by Alveolus type
Piece is formed.
Further, in the electromagnetic type bearing-free double salient-pole electric machine, stator core is located at outside rotor core or turned
It is sub unshakable in one's determination outside stator core.
The control method of electromagnetic type bearing-free double salient-pole electric machine, armature winding are connected with external current-regulating circuit, Exciting Windings for Transverse Differential Protection
It is connected with external excitation control circuit, suspending windings are connected with suspension control circuit, and control method is specific as follows：
Detect rotor actual displacement, the virtual voltage of external current-regulating circuit DC side；
The difference of the virtual voltage of external current-regulating circuit DC side and its reference value is modulated using adjustment of field excitation link
Obtain exciting current reference value, adjust the dutycycle of switching device in external excitation control circuit to realize that exciting current tracks it
Reference value；
The difference of rotor actual displacement and its reference value is modulated using suspension governing loop to obtain α direction of principal axis suspension electricity
Reference value, β direction of principal axis levitating current reference values are flowed, adjusts the dutycycle of switching device in suspension control circuit to realize α axle sides
To levitating current tracks its reference value, β direction of principal axis levitating currents track its reference value.
Further, the control method of the electromagnetic type bearing-free double salient-pole electric machine, using PID controller as Excitation Adjustment
Save link, suspension governing loop.
Further, the control method of the electromagnetic type bearing-free double salient-pole electric machine, can not control rectifying circuit using full-bridge
Or zero formula can not control rectifying circuit as external current-regulating circuit.
Further, the control method of the electromagnetic type bearing-free double salient-pole electric machine, using single tube chopper circuit or not right
Claim half-bridge circuit as external excitation control circuit.
Further, the control method of the electromagnetic type bearing-free double salient-pole electric machine, using full bridge inverter as outstanding
Floating control circuit.
The present invention uses above-mentioned technical proposal, has the advantages that：
(1) motor realizes that the excitation of motor eliminates permanent magnet and tied to simplify using the Exciting Windings for Transverse Differential Protection being wound in stator poles
Structure, while bias magnetic field is provided, Non-linear coupling problem is avoided using independent levitation winding control suspending power, the present invention discloses
Double salient-pole electric machine stator and rotor sructure it is similar to switched reluctance machines, therefore be adapted to high temperature and high speed operation；
(2) power generation operation is simple independent of controlled power converter and rotor-position angle transducer, system architecture, it is only necessary to
The i.e. controllable output voltage of flexible modulation exciting current；
(3) the levitating current control in suspending windings is unrelated with rotor position angle and armature supply size, and α direction of principal axis hangs
Floating winding and magnetic field orthotropic caused by β direction of principal axis suspending windings, bias magnetic field caused by Exciting Windings for Transverse Differential Protection is independent, therefore the control that suspends
Excellent performance；
(4) reduce suspension control power device, improve system reliability, reduce system cost；
(5) control method individually controls levitating current and exciting current, can conveniently realize that motor suspends and control and export
Control, the mutual decoupling between realizing motor output and suspending.
The additional aspect of the present invention and advantage will be set forth in part in the description, and these will become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Brief description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, required use in being described below to embodiment
Accompanying drawing be briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for this
For the those of ordinary skill of field, without having to pay creative labor, it can also be obtained according to these accompanying drawings other
Accompanying drawing.
Fig. 1 is the structural representation of electromagnetic type bearing-free double salient-pole electric machine of the present invention；
Fig. 2 (a) to Fig. 2 (d) is respectively electromagnetic type bearing-free double salient-pole electric machine external current-regulating circuit of the present invention, excitation con-trol
Circuit, α axles suspension control circuit, the schematic diagram of β axle suspension control circuits；
Flow direction schematic diagram when Fig. 3 is 0 degree of electromagnetic type bearing-free double salient-pole electric machine rotor of the present invention；
Fig. 4 is electromagnetic type bearing-free double salient-pole electric machine rotor β direction of principal axis stress of the present invention with rotor position angle change curve
Schematic diagram；
Fig. 5 be electromagnetic type bearing-free double salient-pole electric machine rotor β direction of principal axis mean forced values of the present invention and β direction of principal axis suspend around
Levitating current relation curve schematic diagram in group.
Label declaration in figure：1st, stator core；2nd, rotor core；3rd, armature winding；4th, Exciting Windings for Transverse Differential Protection；5th, α direction of principal axis hangs
Floating winding；6th, β direction of principal axis suspending windings；Magnetic flux caused by Exciting Windings for Transverse Differential Protection when the 7th, leading to positive direction exciting current；8th, pros are led to
To the magnetic flux that suspended caused by suspending windings during levitating current；D1-D6For the first to the 6th commutation diode；LfFor Exciting Windings for Transverse Differential Protection；Q
For switch mosfet pipe；Q1-Q8For the first metal-oxide-semiconductor to the 8th metal-oxide-semiconductor.
Embodiment
Embodiments of the present invention are described below in detail, the embodiment below with reference to accompanying drawing description is exemplary
, it is only used for explaining the present invention, and be not construed as limiting the claims.
Those skilled in the art of the present technique are appreciated that unless expressly stated, singulative " one " used herein, " one
It is individual ", " described " and "the" may also comprise plural form.It is to be further understood that what is used in the specification of the present invention arranges
Diction " comprising " refer to the feature, integer, step, operation, element and/or component be present, but it is not excluded that in the presence of or addition
One or more other features, integer, step, operation, element, component and/or combinations thereofs.It should be understood that when we claim
Element is " connected " or during " coupled " to another element, and it can be directly connected or coupled to other elements, or can also deposit
In intermediary element.In addition, " connection " used herein or " coupling " can include wireless connection or coupling.Wording used herein
"and/or" includes any cell of one or more associated list items and all combined.
It will be understood to those skilled in the art that unless otherwise defined, all terms used herein (including technical term
And scientific terminology) there is the general understanding identical meaning of the ordinary technical staff in the technical field of the invention.Should also
Understand, those terms defined in such as general dictionary, which should be understood that, to be had and the meaning in the context of prior art
The consistent meaning of justice, and unless defined as here, will not be with idealizing or the implication of overly formal be explained.
Fig. 1 shows electromagnetic type bearing-free double salient-pole electric machine structural representation of the present invention, using the double-salient-pole knot of 12/8 pole
Structure, including stator core 1, rotor core 2, armature winding 3, Exciting Windings for Transverse Differential Protection 4, α direction of principal axis suspending windings 5 and β direction of principal axis suspend
Winding 6, wherein, α axles are the transverse axis in rectangular coordinate system, and β axles are the longitudinal axis in rectangular coordinate system, and stator core 1 includes 12
Tooth pole, every 3 tooth pole form a stator poles, and the gap between adjacent stator pole forms stator slot.Rotor core 2 is by Alveolus type
Core-lamination stack is formed.Each stator tooth extremely on be wound with armature coil, by the flux change rule principle of identity of its linkage according to Fig. 1
Shown wiring is followed in series to form armature winding 3.In threephase armature winding, per mutually there is two leading-out terminals, three-phase altogether six
Individual leading-out terminal, respectively A, X, B, Y, C, Z, wherein, A, B, C are Same Name of Ends.Embedded with the excitation being wound in stator poles in stator slot
Coil, Exciting Windings for Transverse Differential Protection 4 is followed in series to form according to the wiring shown in Fig. 1：It is identical often to cover magnet exciting coil winding method, shares two
Connection end, respectively the first connection end and second connection end, with certain set magnet exciting coil Lf1The first connection end be a leading-out terminal, its
A set of magnet exciting coil L under second connection end and suitable (inverse) are conterclockwisef2Second connection end series connection, Lf2The first connection end
Again with its along (inverse) it is conterclockwise under a set of magnet exciting coil Lf3The first connection end series connection, according to this rule, the first connection end
Connected with the first connection end, second connection end is connected with second connection end, by along (inverse) clockwise by all magnet exciting coils according to
Secondary series connection, excitation winding, the first connection end of last a set of magnet exciting coil share two as another leading-out terminal, Exciting Windings for Transverse Differential Protection
Individual leading-out terminal Lf+、Lf-, two leading-out terminals of Exciting Windings for Transverse Differential Protection are connected with external excitation control circuit.It is embedded with stator slot and is wound on stator
Suspended coil on extremely, wherein two in spatial radial relative position set suspended coil are connected as shown in Figure 1, respectively constitute generation
The α direction of principal axis suspending windings 5 and β direction of principal axis suspending windings 6 of orthogonal suspension magnetic, α direction of principal axis suspending windings 5 share two outlets
Hold Lα+ and Lα- connected respectively with α axle suspension control circuits, β direction of principal axis suspending windings 6 share two leading-out terminal Lβ+ and Lβ- respectively
Connected with β axle suspension control circuits.
The electromagnetic type bearing-free double salient-pole electric machine of the structure of three-phase 12/8 shown in Fig. 1 is only one embodiment of the present of invention, this
The technical scheme of invention is also applied to 12n/8n three-phase structure or 16n/12n four phase structures, and n is positive integer.Fig. 1 is rotor
Electric machine structure in stator, technical scheme apply also for the electric machine structure that rotor is located at outside stator.This area
Technical staff remaining achievable embodiment can be obtained according to present disclosure, disclosed embodiment is not formed pair
The limitation of the present invention.
Fig. 2 (a) to Fig. 2 (d) is respectively that the external current-regulating circuit of electromagnetic type bearing-free double salient-pole electric machine of the present invention, outside are encouraged
Control circuit, α axles suspension control circuit, β axle suspension control circuit schematic diagrames.
Fig. 2 (a) carries out rectification using full-bridge uncontrollable rectifier circuit to caused alternating current on threephase armature winding：First is whole
Flow diode D1With the 4th commutation diode D4Series connection, the second commutation diode D2With the 5th commutation diode D5Series connection, the 3rd is whole
Flow diode D3With the 6th commutation diode D6Series connection, the first commutation diode D1, the second commutation diode D2, the 3rd rectification two
Pole pipe D3Negative electrode connection, the 4th commutation diode D4, the 5th commutation diode D5, the 6th commutation diode D6Anode connection.
LA、LB、LCThe input connection of threephase armature winding, LA、LB、LCThe output end of three-phase windings respectively with the first commutation diode D1
Anode, the second commutation diode D2Anode, the 3rd commutation diode D3Anode connection.Zero formula can also be used uncontrollable
Rectification circuit is as external current-regulating circuit.
External excitation control circuit shown in Fig. 2 (b)：Exciting Windings for Transverse Differential Protection LfOne end and DC excitation voltage source UfPositive pole connects
Connect, the other end connects with switch mosfet pipe Q drain electrodes, switch mosfet pipe Q source electrodes and DC excitation voltage source UfNegative pole connects,
Fly-wheel diode negative electrode and DC excitation voltage source UfPositive pole connects, the drain electrode of fly-wheel diode anode and switch mosfet pipe Q
Connection.Asymmetry half-bridge circuit can also be used as external excitation control circuit.
α axle suspension control circuits shown in Fig. 2 (c)：First metal-oxide-semiconductor Q1With the second metal-oxide-semiconductor Q2Series connection, the 3rd metal-oxide-semiconductor Q3With
4th metal-oxide-semiconductor Q4Series connection, the first metal-oxide-semiconductor Q1Drain electrode, the 3rd metal-oxide-semiconductor Q3Drain electrode and direct voltage source UαPositive pole connection, second
Metal-oxide-semiconductor Q2With the 4th metal-oxide-semiconductor Q4Source electrode and direct voltage source UαNegative pole connection, α direction of principal axis suspending windings LαBoth ends difference
With the first metal-oxide-semiconductor Q1Source electrode, the 3rd metal-oxide-semiconductor Q3Source electrode connection.
β axle suspension control circuits shown in Fig. 2 (d)：5th metal-oxide-semiconductor Q5With the 6th metal-oxide-semiconductor Q6Series connection, the 7th metal-oxide-semiconductor Q7With
8th MOS Q8Series connection, the 5th metal-oxide-semiconductor Q5Drain electrode, the 7th metal-oxide-semiconductor Q7Drain electrode and direct voltage source UβPositive pole connection, the 6th
Metal-oxide-semiconductor Q6Source electrode, the 8th metal-oxide-semiconductor Q8Source electrode and direct voltage source UβNegative pole connection, β direction of principal axis suspending windings LβBoth ends
Respectively with the 5th metal-oxide-semiconductor Q5Source electrode, the 7th metal-oxide-semiconductor Q7Source electrode connection.
When Fig. 3 show 0 degree of electromagnetic type bearing-free double salient-pole electric machine rotor of the present invention, excitation when leading to positive direction exciting current
The schematic diagram of suspension magnetic flux 8 caused by suspending windings when magnetic flux 7 caused by winding and logical positive direction levitating current, wherein,
The sense of current in Exciting Windings for Transverse Differential Protection and β direction of principal axis suspending windings is as shown in Figure 3.In top gas after the energization of β direction of principal axis suspending windings
Suspension magnetic flux is identical with magnetic flux direction caused by gap, suspension magnetic flux caused by the air gap of bottom and magnetic flux direction
On the contrary, cause air-gap field unequal in β direction of principal axis.It can be seen from the air-gap field distribution situation at the moment, on the upside of rotor
Air-gap field is stronger than the air-gap field of downside, therefore rotor offsets rotor β direction of principal axis stress by by suspending power vertically upward
With suppression rotor eccentricity.When the levitating current increase in β direction of principal axis suspending windings, suspending power that rotor is subject in β direction of principal axis
Increase, when the levitating current in β direction of principal axis suspending windings is reverse, rotor is reverse in the suspending power that β direction of principal axis is subject to.Similarly, lead to
The levitating current size and Orientation crossed in control α direction of principal axis suspending windings, can control rotor in the big of the suspending power of α direction of principal axis
Small and direction.It is it can be seen that caused by controlling the size and Orientation of electric current in α axles and β direction of principal axis suspending windings to control
The size of suspending power and direction, so that rotor stability suspends.
Fig. 4 is electromagnetic type bearing-free double salient-pole electric machine rotor β direction of principal axis stress of the present invention with rotor position angle change curve.
Levitating current in given β direction of principal axis suspending windings, in rotor rotation process, suspending power is held essentially constant, root during operation
The rotor displacement signal obtained according to the radial displacement transducer of α direction of principal axis and β direction of principal axis, quick regulation levitating current, you can real
Existing excellent suspendability.
Fig. 5 be electromagnetic type bearing-free double salient-pole electric machine rotor β direction of principal axis mean forced values of the present invention and β direction of principal axis suspend around
Current relationship curve in group.Given exciting current, stress of the rotor in β direction of principal axis and the electric current in β direction of principal axis suspending windings
Relation curve for one cross origin straight line, the linearity is good, further increases suspension control performance.
Electromagnetic type bearing-free double salient-pole electric machine basic control method is：Detected by the radial displacement transducer of α direction of principal axis
The electromagnetic type bearing-free double salient-pole electric machine rotor-position obtains α direction of principal axis rotor actual displacements, passes through the radial direction position of β direction of principal axis
Displacement sensor detects the electromagnetic type bearing-free double salient-pole electric machine rotor-position and obtains β direction of principal axis rotor actual displacements, detects institute
State DC side virtual voltage U of the electromagnetic type bearing-free double salient-pole electric machine armature winding after rectification circuitdc, wherein, β axles are straight
The longitudinal axis in angular coordinate system, α axles are the transverse axis in rectangular coordinate system.By given electromagnetic type bearing-free double salient-pole electric machine α axle sides
PID governing loops are floated to the difference with reference to displacement and α direction of principal axis rotor actual displacements by α axle suspension to modulate to obtain electromagnetic type bearing-free
Double salient-pole electric machine α direction of principal axis suspending windings control electric current (be α direction of principal axis levitating currents reference value), by given electromagnetic type without
Bearing double salient-pole electric machine β direction of principal axis floats PID governing loops with reference to the difference of displacement and β direction of principal axis rotor actual displacements by β axle suspension
It (is the reference of β direction of principal axis levitating current that modulation, which obtains electromagnetic type bearing-free double salient-pole electric machine β direction of principal axis suspending windings control electric current,
Value), DC side reference voltage U of the given electromagnetic type bearing-free double salient-pole electric machine armature winding after rectification circuito *With electricity
DC side virtual voltage U of the magnetic-type bearing-free double salient-pole electric machine armature winding after rectification circuitdcDifference through overexcitation PID adjust
Section link adjusts to obtain excitation con-trol electric current (being exciting current reference value).Adjust the switching tube in external excitation control circuit
Dutycycle, the actual exciting current in Exciting Windings for Transverse Differential Protection is adjusted, reach the purpose of control output voltage.Adjust the floating control electricity of α axle suspension
Switching tube dutycycle in road and β axle suspension control circuits, adjust in α direction of principal axis suspending windings and β direction of principal axis suspending windings
Actual levitating current, effect as shown in Figure 3, suspension magnetic increase or reduction excitation field, reach control radial suspension force
Purpose.
One of ordinary skill in the art will appreciate that：Accompanying drawing is the schematic diagram of one embodiment, module in accompanying drawing or
Flow is not necessarily implemented necessary to the present invention.
Claims (8)
1. electromagnetic type bearing-free double salient-pole electric machine, using the double-salient-pole structure of 12/8 pole, it is characterised in that the double salient-pole electric machine bag
Include：Stator core, rotor core, armature winding, Exciting Windings for Transverse Differential Protection, suspending windings, rotor core include several rotor tooth poles, stator
Iron core includes several stator poles for being made up of some stator tooth poles, and the gap between adjacent stator pole forms stator slot, stator tooth
The armature coil being wound with extremely forms armature winding, three stator tooths after being connected by its linkage flux change rule identical principle
Embedding in the stator poles that pole is formed to be wound with magnet exciting coil, often set magnet exciting coil winding method is identical and often set magnet exciting coil has respectively
First connection end and second connection end, with the second connection end of first set magnet exciting coil and clockwise second set of excitation wire
The second connection end series connection of circle, the first connection end of second set of magnet exciting coil again with its clockwise 3rd set of magnet exciting coil
The series connection of the first connection end, the second connection end of the 3rd set of magnet exciting coil again with its clockwise 4th set of magnet exciting coil
Second connection end is connected, and all magnet exciting coils are followed in series to form Exciting Windings for Transverse Differential Protection, embedding in the stator poles that three stator tooth poles are formed
It is wound with suspended coil, the α axles for producing orthogonal suspension magnetic is formed respectively after the suspended coil connection in spatial radial relative position
Direction suspending windings and β direction of principal axis suspending windings.
2. electromagnetic type bearing-free double salient-pole electric machine according to claim 1, it is characterised in that the rotor is by Alveolus type iron
Heart lamination is formed.
3. electromagnetic type bearing-free double salient-pole electric machine according to claim 1, it is characterised in that stator core is located at rotor iron
Outside the heart or rotor core is located at outside stator core.
4. the control method of the 1 or 2 or 3 electromagnetic type bearing-free double salient-pole electric machine of claim, it is characterised in that armature winding
It is connected with external current-regulating circuit, Exciting Windings for Transverse Differential Protection is connected with external excitation control circuit, and suspending windings are connected with suspension control circuit,
Control method is specific as follows：
Detect rotor actual displacement, the virtual voltage of external current-regulating circuit DC side；
The difference of the virtual voltage of external current-regulating circuit DC side and its reference value is modulated to obtain using adjustment of field excitation link
Exciting current reference value, the dutycycle of switching device in external excitation control circuit is adjusted to realize that exciting current tracks its reference
Value；
The difference of rotor actual displacement and its reference value is modulated using suspension governing loop to obtain α direction of principal axis levitating current ginseng
Examine value, β direction of principal axis levitating current reference values, adjust the dutycycle of switching device in suspension control circuit to realize that α direction of principal axis hangs
Floating its reference value of current tracking, β direction of principal axis levitating currents track its reference value.
5. the control method of electromagnetic type bearing-free double salient-pole electric machine according to claim 4, it is characterised in that the excitation
Governing loop, suspension governing loop are PID controller.
6. the control method of electromagnetic type bearing-free double salient-pole electric machine according to claim 4, it is characterised in that the outside
Rectification circuit be full-bridge can not control rectifying circuit or zero formula can not control rectifying circuit.
7. the control method of electromagnetic type bearing-free double salient-pole electric machine according to claim 4, it is characterised in that the outside
Excitation control circuit is single tube chopper circuit or asymmetry half-bridge circuit.
8. the control method of electromagnetic type bearing-free double salient-pole electric machine according to claim 4, it is characterised in that the suspension
Control circuit is full bridge inverter.
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| CN201510360500.0A CN104967361B (en) | 2015-06-26 | 2015-06-26 | Electromagnetic type bearing-free double salient-pole electric machine and its control method |
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| CN201510360500.0A CN104967361B (en) | 2015-06-26 | 2015-06-26 | Electromagnetic type bearing-free double salient-pole electric machine and its control method |
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| CN109586537B (en) * | 2018-12-21 | 2021-01-19 | 南京航空航天大学 | Bearingless doubly salient motor of segmented rotor and control method thereof |
| CN109672276B (en) * | 2018-12-21 | 2021-01-15 | 南京航空航天大学 | Alternating pole permanent magnet biased bearingless doubly salient motor and control method thereof |
| CN112436695B (en) * | 2020-11-09 | 2022-10-11 | 南京航空航天大学 | Electromagnetic type bearingless doubly salient motor based on parallel structure and control method thereof |
| WO2022198444A1 (en) * | 2021-03-23 | 2022-09-29 | 中国科学院深圳先进技术研究院 | Magnetic levitation system |
| CN113437917B (en) * | 2021-06-29 | 2023-04-07 | 福州大学 | Method for observing eccentricity of rotor of high-frequency pulse vibration current injection bearingless flux switching motor |
| CN116365816B (en) * | 2022-11-29 | 2023-12-01 | 南京航空航天大学 | 6/4-pole bearingless doubly salient sheet motor with parallel structure and suspension control method thereof |
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| CN101546947A (en) * | 2009-05-05 | 2009-09-30 | 南京航空航天大学 | Bearing-free switch reluctance motor and control method thereof |
| CN101546978B (en) * | 2009-05-06 | 2012-05-30 | 南京航空航天大学 | Control method of complete-period generator of bearing-free switch reluctance motor |
| CN103259464B (en) * | 2013-05-10 | 2016-03-02 | 南京邮电大学 | A kind of bearing-free switch reluctance motor |
| CN103296847B (en) * | 2013-05-15 | 2016-03-23 | 南京邮电大学 | A kind of bearing-free switch reluctance motor and control method thereof |
| CN103916056B (en) * | 2014-03-17 | 2016-06-15 | 南京航空航天大学 | 12/8 simplex winding bearingless switched reluctance motor error-tolerant operation control method |
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