CN107707093A - A kind of pouring-in vernier reluctance motor of current harmonics and system - Google Patents
A kind of pouring-in vernier reluctance motor of current harmonics and system Download PDFInfo
- Publication number
- CN107707093A CN107707093A CN201710972050.XA CN201710972050A CN107707093A CN 107707093 A CN107707093 A CN 107707093A CN 201710972050 A CN201710972050 A CN 201710972050A CN 107707093 A CN107707093 A CN 107707093A
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- winding
- reluctance motor
- phase
- current
- sinusoidal
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
- H02K29/03—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with a magnetic circuit specially adapted for avoiding torque ripples or self-starting problems
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/14—Stator cores with salient poles
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/24—Rotor cores with salient poles ; Variable reluctance rotors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/28—Layout of windings or of connections between windings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P25/00—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
- H02P25/02—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the kind of motor
- H02P25/08—Reluctance motors
- H02P25/098—Arrangements for reducing torque ripple
Abstract
The invention discloses a kind of pouring-in vernier reluctance motor of current harmonics and system, vernier reluctance motor body part includes stator, rotor and winding.Stator and rotor are salient-pole structure, winding is individual layer concentratred winding, the different simple sinusoidal alternating current of two frequencies is injected in per phase winding, on the basis of electric current in ensureing winding is three-phase symmetrical electric current, utilize the sinusoidal ac flow component of two different frequencies in winding, the armature magnetomotive force that two numbers of pole-pairs are identical but rotating speed is different is produced, for one of magnetic potential by the modulating action of air-gap permeance, generation is identical with another armature mmf number of pole-pairs same rotational speed and has the space magnetic field of certain angle.The magnetic field interacts with another armature magnetomotive force, so as to produce torque, realizes energy converting between mechanical.Compared with prior art, its current utilization rate improves 11% compared to direct current injection type vernier reluctance motor；In addition, the complexity of the electric system controller part is substantially reduced, cost is also greatly reduced.
Description
Technical field
The invention belongs to reluctance motor technical field, more particularly, to a kind of pouring-in vernier magnetic resistance electricity of current harmonics
Machine and system.
Background technology
Magneto has the advantages that high power density, high efficiency, but permanent magnet is expensive, and holistic cost is high, and forever
Magnet has the risk for being difficult to demagnetization under loss of excitation and fault state, is requiring high to cost control, is needing high reliability, Huo Zhehuan
More difficult application in the case that border is severe.Electro-magnetic motor does not have degaussing risk compared to magneto, and reliability is higher, and cost is more
It is low.Such as synchronous magnetic resistance motor, switched reluctance machines, asynchronous machine, are all widely used.
Synchronous magnetic resistance motor control system is simple, but stator winding is generally overlapping winding, end length, coiling complexity；And
And general complex rotor structure, difficulty of processing is big, and cost is high.
Switched reluctance machines rotor is double-salient-pole structure, using monodentate around concentratred winding, simple in construction, current density ratio
It is higher, but due to its specific power supply mode, drive system is complex, and drive system cost is higher.
Asynchronous machine stator winding is generally overlapping winding, end length, coiling complexity；There is winding (or mouse cage) on rotor,
It need to consider that rotor radiates.
The stator winding of the pouring-in vernier reluctance motor of DC current is monodentate around the non-overlapped concentratred winding of fractional-slot, the electricity
Drive circuit is using winding inverter structure is opened, and current expression is in winding：
ia=Idc+Iacsin(ωct+α)
However, due to being passed through DC current in vernier reluctance motor, drive circuit is controlled more using winding construction, wiring is opened
Device processed is complicated, and control system cost is high；DC current is lower than the utilization rate of sinusoidal current.
The content of the invention
For the disadvantages described above or Improvement requirement of prior art, the invention provides a kind of pouring-in vernier magnetic of current harmonics
Motor and system are hindered, it is complicated its object is to solve the pouring-in vernier reluctance motor wiring construction controller of existing DC current
Technical problem.
To achieve the above object, according to one aspect of the present invention, there is provided a kind of pouring-in vernier magnetic resistance of current harmonics
Motor, including stator, rotor and three-phase windings, only have a port per phase winding and be connected with external circuit；In per phase winding
The electric current being passed through is formed by stacking by the different sinusoidal current component of two frequencies；Wherein, rotary magnetic caused by a sinusoidal current component
The effect of gesture and air-gap permeance produces modulation magnetic field, then with another sinusoidal current component caused by rotating magnetic potential interact, production
Raw torque.
Preferably, winding number of pole-pairs meetsOr
Wherein, PaFor winding number of pole-pairs, NrFor rotor slot number, NsFor number of stator slots.
Preferably, when the sinusoidal current phase sequence for injecting two in A, B, C three-phase is identical, the angular frequency of two sinusoidal currents
Meet formula | ω1+ω2|=ωr, when injecting the sinusoidal current phase sequence difference of two in A, B, C three-phase, two sinusoidal currents
Angular frequency meet | ω1-ω2|=ωr；
In formula, ω1For the angular frequency of first sinusoidal current, ω2For the angular frequency of second sinusoidal current, ωrFor rotor
Angular frequency.
Preferably, the virtual value of two sinusoidal currents is equal in same phase winding and during 90 ° of carrier phase shift, vernier magnetic resistance
Motor torque is maximum.
Preferably, winding uses star and triangle Hybrid connections, and when rotor uses unequal blade spacing structure, can weaken and turn
Square is pulsed.
Preferably, it is identical with the winding quantity using triangle connection using the winding quantity of Y-connection, now weaken
Best results.
Preferably, rotor uses multi-segment structure, and adjacent two sections are staggered 180 °, can further weaken torque pulsation.
According to another aspect of the present invention, there is provided a kind of vernier reluctance motor system, including vernier reluctance motor with
And drive circuit, drive circuit include three bridge arms, electric capacity and dc source, each bridge arm one end connects with DC power anode
Connect, the negative pole of each the bridge arm other end and dc source connection, electric capacity one end is connected with DC power anode, the electric capacity other end and
DC power cathode is connected, and i-th phase winding one end of vernier reluctance motor is connected with j-th of bridge arm neutral point；
Wherein, i is phase sequence number, and j is bridge arm sequence number, i=a, b, c, 1≤j≤3.
In general, by the contemplated above technical scheme of the present invention compared with prior art, it can obtain down and show
Beneficial effect：
1st, the present invention provides vernier reluctance motor, and the reluctance motor uses individual layer concentratred winding, and winding is passed through two differences
The simple alternating current of frequency, two magnetic that number of pole-pairs is identical but rotating speed is different are produced using the electric current of two different frequencies in winding
Gesture, one of magnetic potential produce identical with another magnetic potential number of pole-pairs same rotational speed and have certain angle by permeance modulating effect
Magnetic field, so as to produce torque.
2nd, compared with prior art, winding only one end is connected with external circuitses, and drive circuit is only original half, significantly
Simplify drive circuit；In addition, electric current is all sinusoidal current in winding, the utilization rate of sinusoidal current is higher than DC current by 11%,
Improve current utilization rate.
Brief description of the drawings
Fig. 1 is the structure chart of the pouring-in vernier reluctance motor embodiment of current harmonics provided by the invention；
Fig. 2 is winding connection method in the pouring-in vernier reluctance motor of current harmonics provided by the invention；
Fig. 3 is that rotor unequal blade spacing structure lamination is illustrated in the pouring-in vernier reluctance motor of current harmonics provided by the invention
Figure；
Fig. 4 is the schematic diagram of vernier reluctance motor system provided by the invention.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.As long as in addition, technical characteristic involved in each embodiment of invention described below
Conflict can is not formed each other to be mutually combined.
The pouring-in vernier reluctance motor of current harmonics provided by the invention includes stator 1, rotor 2 and winding 3, stator 1
Set with rotor 2 for coaxial sleeve, stator and rotor sructure can be the default minor structure of outer rotor or external stator internal rotor knot
Structure, only have a port per phase winding and be connected with external circuit, the electric current being passed through in every phase winding is by the different sine of two frequencies
Current component is formed by stacking.Wherein, rotating magnetic potential caused by a sinusoidal current component produces modulation magnetic field with air-gap permeance effect,
Again with another sinusoidal current component caused by rotating magnetic potential interact, produce torque.
Stator 1 and rotor 2 are salient-pole structure, and the salient-pole structure of rotor plays a part of modulating excitation magnetic potential, and it is modulated
Effect can be expressed as：
Λ(θs,t)≈Λr0-Λr1cos[Zr(θS-wrt)]
Wherein, ZrFor rotor slot number；θsFor locus；T is the time；wrFor rotor angular frequency.
When winding number of pole-pairs meets formula (1)：
Wherein, PaFor winding number of pole-pairs, NrFor rotor slot number.
When the phase sequence for being passed through two sinusoidal currents in A, B, C three-phase is identical, i.e., electric current is in A, B, C three-phase：
Wherein, Iac1For the amplitude of first sinusoidal current, ω1For the angular frequency of first sinusoidal current, α1For first
The phase angle of sinusoidal current, Iac2For the amplitude of second sinusoidal current, ω2For the angular frequency of second sinusoidal current, α2For
The phase angle of two sinusoidal currents.
The angular frequency of first sinusoidal current1With the angular frequency of second sinusoidal current2Meet equation below：
|ω1+ω2|=ωr (3)
When winding number of pole-pairs meet formula (1) and be passed through two sinusoidal currents in A, B, C three-phase phase sequence it is identical when, pass through
Rotor 2 is modulated to magnetic potential caused by a sinusoidal current in winding, make caused by the sinusoidal current magnetic potential formed with it is another
Magnetic potential number of pole-pairs same rotational speed is identical caused by individual sinusoidal current and has the magnetic field of certain angle, that is, meets formula (3), and then produce
Raw torque.
When the phase sequence for being passed through two sinusoidal currents in A, B, C three-phase is opposite, i.e., electric current is in A, B, C three-phase：
The angular frequency of first sinusoidal current1With the angular frequency of second sinusoidal current2Meet equation below：
|ω1-ω2|=ωr (5)
When winding number of pole-pairs meet formula (1) and be passed through two sinusoidal currents in A, B, C three-phase phase sequence it is opposite when, pass through
Rotor 2 is modulated to magnetic potential caused by a sinusoidal current in winding, make caused by the sinusoidal current magnetic potential formed with it is another
Magnetic potential number of pole-pairs same rotational speed is identical caused by individual sinusoidal current and has the magnetic field of certain angle, that is, meets formula (5), and then produce
Raw torque.
Winding number of pole-pairs can also meet formula (6)：
Wherein, PaFor winding number of pole-pairs, NrFor rotor slot number, NsFor number of stator slots.
Now, the phase sequence for being passed through two sinusoidal currents in A, B, C three-phase can be identical and opposite two kinds of situations.
When the phase sequence for being passed through two sinusoidal currents in A, B, C three-phase is identical, the angular frequency of first sinusoidal current1With
The angular frequency of second sinusoidal current2Meet formula (3).
When winding number of pole-pairs meet formula (6) and be passed through two sinusoidal currents in A, B, C three-phase phase sequence it is identical when, pass through
Stator 1 and rotor 2 are modulated to magnetic potential caused by a sinusoidal current in winding, form magnetic potential caused by the sinusoidal current
With another sinusoidal current caused by magnetic potential number of pole-pairs same rotational speed it is identical and have the magnetic field of certain angle, that is, meet formula (3),
And then produce torque.
When the phase sequence for being passed through two sinusoidal currents in A, B, C three-phase is opposite, the angular frequency of first sinusoidal current1With
The angular frequency of second sinusoidal current2Meet formula (5).
When winding number of pole-pairs meet formula (6) and be passed through two sinusoidal currents in A, B, C three-phase phase sequence it is opposite when, pass through
Stator 1 and rotor 2 are modulated to magnetic potential caused by a sinusoidal current in winding, form magnetic potential caused by the sinusoidal current
With another sinusoidal current caused by magnetic potential number of pole-pairs same rotational speed it is identical and have the magnetic field of certain angle, that is, meet formula (5),
And then produce torque.
The existing motor that magnetic potential is produced using DC current and alternating current, in the square wave magnetic potential that direct current is established, base
Ripple virtual value is square wave virtual valueTimes.Vernier reluctance motor provided by the invention, DC current is used compared to existing
The motor of magnetic potential is produced with alternating current, current effective value improves
Vernier reluctance motor provided by the invention, when the virtual value of two sinusoidal currents in same phase winding is equal and phase
When angle differs 90 °, the torque of vernier reluctance motor is maximum.
Fig. 1 is the example structure figure of the pouring-in vernier reluctance motor of current harmonics provided by the invention, and stator is 12 grooves,
Rotor is 10 grooves, and winding is 5 pairs of pole windings.The electric current of two different frequencies produces two numbers of pole-pairs all for 5 pairs of poles but rotating speed not
Same magnetic potential, one of them 5 pairs of pole magnetic potential produce 5 pairs of pole fields by rotor tooth 10 to the modulating action of pole magnetic conductance, should
The 5 pairs of pole magnetic potential number of pole-pairs same rotational speeds in magnetic field and another are identical and have certain angle, interact so as to produce torque.
Fig. 2 be the pouring-in vernier reluctance motor of current harmonics provided by the invention in winding connection method, one group of winding A1, B1,
C1 uses delta connection, and another group of winding A2, B2, C2 use star connection, and Fig. 3 injects for current harmonics provided by the invention
Rotor unequal blade spacing lamination schematic diagram in formula vernier reluctance motor.Rotor uses unequal blade spacing structure, and formed has phase with two groups
The corresponding dephased rotor magnetic conductance of poor three-phase windings, wherein, two groups of dephased three-phase windings connect for triangle
The three-phase windings of method three-phase windings and wye connection, so as to produce dephased multiple torques, the crest of torque with another turn
The trough of square is corresponding, and superposition eliminates torque pulsation.When the winding that the winding quantity using Y-connection is connected with using triangle
Quantity is identical to be, weakens torque pulsation best results.
In order to eliminate torque pulsation in vernier reluctance motor, rotor structure uses multi-segment structure, and adjacent two-stage rotor
Offset angular 180 degree, multiple torques by phase difference are produced in motor internal, being superimposed realization by the torque of multiple phase differences disappears
Except torque pulsation.
By above measure, vernier reluctance motor torque pulsation substantially reduces, and can drop to 35% or so by 200%, enter one
Step adds use value.
Fig. 4 is the schematic diagram of vernier reluctance motor system provided by the invention, and the vernier reluctance motor includes vernier magnetic resistance
Motor and drive circuit, drive circuit include three bridge arms, electric capacity and dc source.
First bridge arm is made up of the first triode S1 to connect and the second triode S2, second bridge arm by connect
Three triode S3 and the 4th triode S4 are formed, and the 3rd bridge arm is made up of the 5th triode S5 to connect and the 6th triode S6,
Each bridge arm one end be connected with DC power anode, and the negative pole of each the bridge arm other end and dc source connects, electric capacity one end and
DC power anode is connected, and the electric capacity other end is connected with DC power cathode.A phase windings one end and first of vernier reluctance motor
Individual bridge arm neutral point connection, B phase windings one end of vernier reluctance motor are connected with the second bridge arm neutral point, vernier reluctance motor
C phase windings one end is connected with the 3rd bridge arm neutral point.The A phase windings other end, the B phase windings other end and the C phase winding other ends
It is connected with each other.
By controlling the first triode S1 to the 6th triode S6 turn-on cycle, realize and inject two with C phases in A phases, B phases
The different sinusoidal current of individual frequency, two frequency difference sinusoidal currents produce two magnetic potentials that number of pole-pairs is identical but rotating speed is different,
One of magnetic potential produces identical with another magnetic potential number of pole-pairs same rotational speed and has certain angle by permeance modulating effect
Magnetic field, so as to produce torque.
Vernier reluctance motor system provided by the invention, drive circuit are only original half, enormously simplify driving electricity
Road；In addition, electric current is all sinusoidal current in winding, the utilization rate of sinusoidal current is higher than DC current by 11%, improves electric current profit
With rate.
As it will be easily appreciated by one skilled in the art that the foregoing is merely illustrative of the preferred embodiments of the present invention, not to
The limitation present invention, all any modification, equivalent and improvement made within the spirit and principles of the invention etc., all should be included
Within protection scope of the present invention.
Claims (8)
1. a kind of pouring-in vernier reluctance motor of current harmonics, it is characterised in that including stator, rotor and three-phase windings, often
Phase winding only has a port and is connected with external circuit, and the electric current being passed through in every phase winding is by two frequencies different sinusoidal current point
Amount is formed by stacking；Wherein, rotating magnetic potential caused by a sinusoidal current component and air-gap permeance effect produces modulation magnetic field, then with separately
Rotating magnetic potential caused by one sinusoidal current component interacts, and produces torque.
2. vernier reluctance motor as claimed in claim 1, it is characterised in that winding number of pole-pairs meetsOr
Wherein, PaFor winding number of pole-pairs, NrFor rotor slot number, NsFor number of stator slots.
3. vernier reluctance motor as claimed in claim 1 or 2, it is characterised in that sinusoidal electric when injecting two in A, B, C three-phase
When flow component phase sequence is identical, the angular frequency of two sinusoidal currents meets formula | ω1+ω2|=ωr, when injecting in A, B, C three-phase
Two sinusoidal current component phase sequence differences when, the angular frequency of two sinusoidal currents meets | ω1-ω2|=ωr；
In formula, ω1For the angular frequency of first sinusoidal current, ω2For the angular frequency of second sinusoidal current, ωrFor rotor angular frequency
Rate.
4. the vernier reluctance motor as described in any one of claims 1 to 3, it is characterised in that when two in the same phase winding
The virtual value of individual sinusoidal current component is equal and during 90 ° of carrier phase shift, the torque of vernier reluctance motor is maximum.
5. the vernier reluctance motor as described in any one of Claims 1-4, it is characterised in that winding uses star and triangle
Hybrid connections mode, and rotor uses unequal blade spacing structure.
6. vernier reluctance motor as claimed in claim 5, it is characterised in that the winding quantity using Y-connection is with adopting
The winding quantity connected with triangle is identical.
7. the vernier reluctance motor as described in any one of claim 1 to 6, it is characterised in that the rotor uses multisection type knot
Structure, and adjacent two sections are staggered 180 °.
A kind of 8. electric system of the vernier reluctance motor based on described in any one of claim 1 to 7, it is characterised in that including
Vernier reluctance motor and drive circuit, drive circuit include three bridge arms, electric capacity and dc source, each bridge arm one end with
DC power anode connects, and the negative pole connection of each the bridge arm other end and dc source, electric capacity one end connects with DC power anode
Connect, the electric capacity other end is connected with DC power cathode, i-th phase winding one end and j-th of the bridge arm neutral point of vernier reluctance motor
Connection；
Wherein, i is phase sequence number, and j is bridge arm sequence number, i=a, b, c, 1≤j≤3.
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| CN201710972050.XA CN107707093B (en) | 2017-10-18 | 2017-10-18 | A kind of pouring-in vernier reluctance motor of current harmonics and system |
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| CN107707093B CN107707093B (en) | 2019-04-12 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109600088A (en) * | 2018-10-31 | 2019-04-09 | 华中科技大学 | A kind of harmonic current injection device and method of three-phase inverter |
| CN110247607A (en) * | 2019-06-13 | 2019-09-17 | 华中科技大学 | A kind of switched reluctance machines are opened around set control system and control method |
| CN111010011A (en) * | 2019-08-23 | 2020-04-14 | 浙江永昌电气股份有限公司 | High-efficiency energy-saving switched reluctance motor and preparation method thereof |
| CN113991895A (en) * | 2021-10-14 | 2022-01-28 | 华中科技大学 | Split tooth integrated winding starting generator |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110247607B (en) * | 2019-06-13 | 2021-04-20 | 华中科技大学 | Open winding control system and control method for switched reluctance motor |
| CN111010011A (en) * | 2019-08-23 | 2020-04-14 | 浙江永昌电气股份有限公司 | High-efficiency energy-saving switched reluctance motor and preparation method thereof |
| CN113991895A (en) * | 2021-10-14 | 2022-01-28 | 华中科技大学 | Split tooth integrated winding starting generator |
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| Publication number | Publication date |
|---|---|
| CN107707093B (en) | 2019-04-12 |
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