CN107453573A - A kind of not equidistant mixed excitation bisalient-pole permanent-magnet synchronous machine of stator poles - Google Patents
A kind of not equidistant mixed excitation bisalient-pole permanent-magnet synchronous machine of stator poles Download PDFInfo
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- CN107453573A CN107453573A CN201710854763.6A CN201710854763A CN107453573A CN 107453573 A CN107453573 A CN 107453573A CN 201710854763 A CN201710854763 A CN 201710854763A CN 107453573 A CN107453573 A CN 107453573A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/26—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with rotating armatures and stationary magnets
- H02K21/28—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with rotating armatures and stationary magnets with armatures rotating within the magnets
- H02K21/30—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with rotating armatures and stationary magnets with armatures rotating within the magnets having annular armature cores with salient poles
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/02—Details
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
Abstract
The invention belongs to bisalient-pole permanent-magnet synchronous machine field, and disclose a kind of not equidistant mixed excitation bisalient-pole permanent-magnet synchronous machine of stator poles.It includes stator, rotor, rotating shaft, permanent magnet, DC excitation winding and three-phase alternating current armature winding.Stator is spliced by multiple modules；DC excitation winding is arranged in the groove between two stator poles of same module；The rotor pole of equally distributed salient-pole structure is provided with rotor；Permanent magnet is arranged between adjacent block, for producing the air-gap field between stator and rotor；Rotating shaft is arranged on internal rotor；Exchange armature winding is arranged in the groove between the adjacent stator pole of disparate modules.By the present invention, air-gap field size is adjusted using DC excitation winding, so as to caused back-emf in armature winding during regulation motor high-speed cruising, and then extends the output-constant operation scope of motor.
Description
Technical field
The invention belongs to bisalient-pole permanent-magnet synchronous machine field, is not mixed at equal intervals more particularly, to a kind of stator poles
Close excitation biconvex pole permanent-magnet synchronous machine.
Background technology
In recent years, stator poles and rotor pole be salient-pole structure doubly salient permanent magnet motor obtain it is widely studied, it is existing
Bisalient-pole permanent-magnet synchronous machine in technology can obtain bipolarity magnetic linkage, so as to be greatly enhanced the torque of motor and power
Density.
If the air-gap field of bisalient-pole permanent-magnet synchronous machine is produced by permanent magnet completely, air-gap field is difficult to adjust, when
Motor operation can make to induce higher back-emf in exchange armature winding in high engine speed range；When back-emf is higher than power supply
During voltage, energy can not be input into motor from power supply, so as to which motor can not be made to maintain rotating speed operation, therefore, prior art
The bisalient-pole permanent-magnet synchronous machine mentioned has the shortcomings that speed adjustable range is narrow, weak magnetism speed expansion ability.Although carry in the prior art
Go out to have mixed excitation bisalient-pole permanent-magnet synchronous machine to improve its weak magnetic property, but the magnetic linkage of armature winding interlinkage is exchanged with it
It is extremely limited for groove area shared by unipolarity (cause torque density smaller) or its DC excitation winding (because being limited by self structure
System), so as to be difficult to give full play to its adjustable magnetic performance and solve the problems, such as the weak-magnetic speed-regulating of bisalient-pole permanent-magnet synchronous machine.
The content of the invention
For the disadvantages described above or Improvement requirement of prior art, do not mixed at equal intervals the invention provides a kind of stator poles
Excitation biconvex pole permanent-magnet synchronous machine, by using two groups of windings of polyphase ac winding and DC excitation, wherein straight by controlling
Sense of current and size can adjust its caused magnetic field in stream Exciting Windings for Transverse Differential Protection, so with permanent magnet caused by magnetic field phase interaction
With, air-gap field is increased or is weakened, while stator poles are used and not set at equal intervals, it is straight by optimization design regulation
Flow Exciting Windings for Transverse Differential Protection and exchange the groove area ratio shared by armature winding, so as to increase the regulating power in motor gas-gap magnetic field, thus
Solves the narrow technical problem of bisalient-pole permanent-magnet synchronous machine weak magnetic ability, speed adjustable range.
To achieve the above object, it is proposed, according to the invention, provide a kind of not equidistant mixed excitation bisalient-pole permanent-magnet of stator
Synchronous motor, the motor include stator, rotor, permanent magnet, exchange armature winding, DC excitation winding and rotating shaft, its feature and existed
In,
The stator is arranged on the outside of the rotor, and the stator is spliced by multiple identical modules, each module
On be provided with angle and beTwo salient pole stator poles, the angle in disparate modules between adjacent stator poles is θ, wherein,
It is unequal with θ, it is consequently formed not equidistant stator poles；In addition, it is provided with the permanent magnet between the adjacent module；
It is provided with the DC excitation winding in adjacent stator pole in the same module, adjacent stators in the different modules
The exchange armature winding is provided with extremely, all exchange armature winding forms exchange winding collection, the exchange winding
The electric current of a variety of phases is passed through on the exchange armature winding of concentration；
The rotor is arranged in the rotating shaft, and equally distributed multiple salient-pole structures are provided with the excircle of the rotor
Rotor pole, and the rotor pole is oppositely arranged with the stator poles.
It is further preferred that the electric current of a variety of phases is passed through on the exchange armature winding, the phase between each electric current
Position angle δ is carried out according to following expression formula,
Wherein, m is the electric current number of phases being passed through, and m is greater than or equal to 3 positive integer.
It is further preferred that the direction of magnetization of adjacent permanent magnet is opposite.
It is further preferred that the relation between the stator poles, rotor pole and the number of phases is carried out according to following expression formula,
Wherein, NsRepresent stator poles, NrRotor number of poles is represented, k is arbitrary integer.
It is further preferred that the angleRelation between θ is carried out according to following expression formula,
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, for the present invention by using polyphase ac armature winding, different phase windings are passed through electric current (sine wave or square wave)
Phase mutual deviation 360/m (m is the number of phases of motor) electrical angle, so as to obtain higher torque density and detent torque, and is improved
The reliability of motor；
2nd, motor of the present invention is provided with DC excitation winding, can be by controlling the size of electric current in DC excitation winding
The regulation in motor gas-gap magnetic field is realized with direction, and then the weak magnetism speed expansion ability of motor can be improved, extends its output-constant operation
Scope；
3rd, the groove area shared by the polyphase armature winding and DC excitation winding of motor of the present invention can be same by adjusting
The angle between two stator poles in one module is allocated, so as to ensure that DC excitation winding has larger groove
Area and the higher number of turn, and then ensure that it has stronger flux control ability, motor is obtained stronger weak magnetism speed expansion
Power；
4th, the present invention simplifies production by the way that stator, rotor, rotating shaft, permanent magnet and armature winding Integrated design is integral
Product structure so that the overall structure of motor is more compact, and it is ingenious to possess integral layout, is easy to manipulation and easy to use waits spy
Point.
Brief description of the drawings
Fig. 1 is according to the not equidistant composite excitation of the pole stator poles of 12 groove of three-phase 5 constructed by the preferred embodiments of the present invention
The structural representation of bisalient-pole permanent-magnet synchronous machine；
Fig. 2 is according to the not equidistant composite excitation of the pole stator poles of 12 groove of three-phase 8 constructed by the preferred embodiments of the present invention
The structural representation of bisalient-pole permanent-magnet synchronous machine；
Fig. 3 is according to the not equidistant composite excitation of the pole stator poles of five phases, 20 groove 12 constructed by the preferred embodiments of the present invention
The structural representation of bisalient-pole permanent-magnet synchronous machine；
Fig. 4 is according to the not equidistant composite excitation of the pole stator poles of 12 groove of three-phase 5 constructed by the preferred embodiments of the present invention
Bisalient-pole permanent-magnet synchronous machine is when exciting current is zero, caused magnetic linkage change curve in A cross streams armature winding；
Fig. 5 is according to the not equidistant composite excitation of the pole stator poles of 12 groove of three-phase 5 constructed by the preferred embodiments of the present invention
Bisalient-pole permanent-magnet synchronous machine is when only Exciting Windings for Transverse Differential Protection is passed through electric current progress excitation, caused magnetic in A cross streams armature winding
Chain change curve；
Fig. 6 is according to the not equidistant composite excitation of the pole stator poles of 12 groove of three-phase 5 constructed by the preferred embodiments of the present invention
Unloaded magnetic linkage change curve under bisalient-pole permanent-magnet synchronous machine different exciting electric current.
In all of the figs, identical reference is used for representing identical element or structure, wherein：
1- stator 2- permanent magnet 3- rotors 4,5,6-A, B, C three-phase alternating current armature winding 7- DC excitation windings 8-
Rotating shaft 9-D cross streams armature winding 10-E cross streams armature winding
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.
With reference to according to a preferred embodiment of the present invention, Fig. 1 is according to constructed by the preferred embodiments of the present invention
The not equidistant mixed excitation bisalient-pole permanent-magnet synchronous machine of the pole stator poles of 12 groove of three-phase 5 structural representation, Fig. 2 be according to this
The not equidistant mixed excitation bisalient-pole permanent-magnet synchronous machine of the pole stator poles of 12 groove of three-phase 8 constructed by the preferred embodiment of invention
Structural representation, Fig. 3 are not mixed equidistantly according to the pole stator poles of five phases, 20 groove 12 constructed by the preferred embodiments of the present invention
The structural representation of excitation biconvex pole permanent-magnet synchronous machine, as shown in Figures 1 to 3, a kind of not equidistant composite excitation of stator poles
Bisalient-pole permanent-magnet synchronous machine, it includes stator 1, rotor 3, rotating shaft 8, permanent magnet 2, three-phase alternating current armature winding 4,5,6 and straight
Flow Exciting Windings for Transverse Differential Protection 7.
Stator 1 is spliced by multiple identical modules, and each module is in " π " shaped iron core, on same " π " shaped iron core
Two stator poles anglesIt is unequal with two stator poles angle thetas on adjacent " π " shaped iron core, therefore stator poles are in stator circumference
Upper uneven distribution；Permanent magnet 2 is arranged between adjacent two pieces of " π " shaped iron cores, permanent magnet magnetization direction circumferentially, and
The direction of magnetization of adjacent permanent magnet is opposite；Exchange armature winding 4,5,6 be arranged at same " π " shaped iron core two stator poles it
Between groove in, DC excitation winding 7 is arranged in the groove between two stator poles of adjacent " π " shaped iron core；
The rotor pole of equally distributed multiple salient-pole structures is provided with rotor 3；Rotating shaft 8 is arranged on internal rotor, works as friendship
After stream armature winding is passed through electric current, magnetic field and magnetic field phase caused by permanent magnet and DC excitation winding caused by armature winding are exchanged
Interaction, so that rotor 3 and rotating shaft 8 can rotate motion relative to stator.
Permanent magnet 2 is arranged between two adjacent " π " shaped iron cores, and permanent magnet circumferentially magnetizes, and adjacent
The direction of magnetization of two pieces of permanent magnets is opposite.
Three-phase alternating current armature winding 4,5,6 is arranged in the groove between two stator poles of same " π " shaped iron core, direct current
Exciting Windings for Transverse Differential Protection 7 is arranged in the groove between two stator poles of adjacent " π " shaped iron core.
For stator poles, rotor number of poles and the number of phases for motor, it is preferred to use following relation (one)：
Wherein, NsRepresent stator poles, NrRotor number of poles is represented, m represents the number of phases, and k is arbitrary integer.
The angle of two stator poles on adjacent " π " shaped iron core is θ, two stator poles folder on same " π " shaped iron core
Angle isWherein θ be less thanArbitrary value.
In order to fully illustrate motor operation principle of the present invention, the characteristics of to embody motor of the present invention, following motor is devised
Parameter (is shown in Table 1), and carries out correlation analysis：
The motor major parameter of table 1
In order to absolutely prove the operation principle and its weak magnetic effect of the mixed excitation bisalient-pole permanent-magnet synchronous machine of the present invention,
Finite element modeling is carried out to the motor of structural parameters shown in table 1, and analyzed, obtains A phases sky when Exciting Windings for Transverse Differential Protection is not passed through electric current
Magnetic linkage is carried with the change curve of rotor-position electrical angle, Fig. 4 is according to the groove 5 of three-phase 12 constructed by the preferred embodiments of the present invention
Stator poles not equidistant mixed excitation bisalient-pole permanent-magnet synchronous machine in pole is when exciting current is zero, in A cross streams armature winding
Caused magnetic linkage change curve, as shown in figure 4, the mixed excitation bisalient-pole permanent-magnet synchronous machine of the present invention enters in only permanent magnet
During row excitation, more sinusoidal magnetic linkage can be produced in armature winding is exchanged, so as to induce more sinusoidal back-emf,
And its amplitude is about 0.1234Wb.
Fig. 5 is according to the not equidistant composite excitation of the pole stator poles of 12 groove of three-phase 5 constructed by the preferred embodiments of the present invention
Bisalient-pole permanent-magnet synchronous machine is when only Exciting Windings for Transverse Differential Protection is passed through electric current progress excitation, caused magnetic in A cross streams armature winding
Chain change curve, as shown in figure 5, when only DC excitation winding 7 carries out excitation, the unloaded magnetic in A cross streams armature winding
Chain with rotor-position electrical angle change curve.As shown in Figure 5, when the positive excitation electricity that 50A is passed through in DC excitation winding
During stream, in A cross streams armature winding caused magnetic linkage close to sine wave, its amplitude be about 0.0340Wb.When in DC excitation
When 100A reverse exciting current is passed through in winding, can A cross streams armature winding produce opposite phase magnetic linkage, but still close to
Sine wave, and its amplitude is about 0.0681Wb.
Fig. 6 is according to the not equidistant composite excitation of the pole stator poles of 12 groove of three-phase 5 constructed by the preferred embodiments of the present invention
Unloaded magnetic linkage change curve under bisalient-pole permanent-magnet synchronous machine different exciting electric current, as shown in fig. 6, in permanent magnet 2 and direct current
Exciting Windings for Transverse Differential Protection 7 acts on simultaneously when, the unloaded permanent magnet flux linkage in A cross streams armature winding is bent with the change of rotor-position electrical angle
Line.It will be appreciated from fig. 6 that when being passed through -100A exciting current in DC excitation winding, caused by A cross streams armature winding
Unloaded magnetic linkage close to sine wave, its amplitude be about 0.0547Wb；When being passed through 50A exciting current in DC excitation winding 7,
Caused unloaded magnetic linkage is the sine wave that amplitude is 0.1414Wb in A cross streams armature winding.Therefore, by controlling DC excitation
The size and Orientation of electric current in winding, adjustable air gap is strong and weak, and then adjusts caused magnetic linkage in A cross streams armature winding
Size, so as to which mixed excitation bisalient-pole permanent-magnet synchronous machine of the invention has stronger flux control ability, can greatly change
The weak magnetism speed expansion ability of kind motor, widens its output-constant operation scope.
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 (5)
1. a kind of not equidistant mixed excitation bisalient-pole permanent-magnet synchronous machine of stator, the motor include stator (1), rotor (3),
Permanent magnet (2), exchange armature winding, DC excitation winding (7) and rotating shaft (8), it is characterised in that
The stator (1) is arranged on the outside of the rotor, and the stator is spliced by multiple identical modules, in each module
Being provided with angle isTwo salient pole stator poles, the angle in disparate modules between adjacent stator poles is θ, wherein,With
θ is unequal, is consequently formed not equidistant stator poles；In addition, it is provided with the permanent magnet between the adjacent module
(2)；The DC excitation winding (7) is provided with adjacent stator pole in the same module, in the different modules
The exchange armature winding is provided with adjacent stator pole, all exchange armature winding forms exchange winding collection, should
The electric current of a variety of phases is passed through on exchange armature winding in exchange winding collection；
The rotor (3) is arranged in the rotating shaft (8), and equally distributed multiple salient pole knots are provided with the excircle of the rotor
The rotor pole of structure, and the rotor pole is oppositely arranged with the stator poles.
2. a kind of not equidistant mixed excitation bisalient-pole permanent-magnet synchronous machine of stator as claimed in claim 1, its feature exist
In being passed through the electric currents of a variety of phases on the exchange armature winding, the phase angle δ between each electric current reaches according to following table
Formula is carried out,
Wherein, m is the electric current number of phases being passed through, and m is greater than or equal to 3 positive integer.
3. a kind of not equidistant mixed excitation bisalient-pole permanent-magnet synchronous machine of stator poles as claimed in claim 1 or 2, it is special
Sign is that the direction of magnetization of the adjacent permanent magnet (2) is opposite.
4. a kind of not equidistant mixed excitation bisalient-pole permanent-magnet synchronous machine of stator as claimed in claim 2, its feature exist
In, the relation between the stator poles, rotor pole and the number of phases is carried out according to following expression formula,
<mrow>
<mfrac>
<msub>
<mi>N</mi>
<mi>s</mi>
</msub>
<msub>
<mi>N</mi>
<mi>r</mi>
</msub>
</mfrac>
<mo>=</mo>
<mfrac>
<mrow>
<mn>4</mn>
<mi>m</mi>
</mrow>
<mrow>
<mn>4</mn>
<mi>m</mi>
<mo>&PlusMinus;</mo>
<mi>k</mi>
</mrow>
</mfrac>
</mrow>
Wherein, NsRepresent stator poles, NrRotor number of poles is represented, k is arbitrary integer.
5. the not equidistant mixed excitation bisalient-pole permanent-magnet synchronous machine of a kind of stator as described in claim any one of 1-4,
Characterized in that, the angleRelation between θ is carried out according to following expression formula,
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| CN201710854763.6A CN107453573A (en) | 2017-09-20 | 2017-09-20 | A kind of not equidistant mixed excitation bisalient-pole permanent-magnet synchronous machine of stator poles |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108233563A (en) * | 2017-12-29 | 2018-06-29 | 南京航空航天大学 | A kind of multiphase hybrid exciting synchronous motor |
| CN108808895A (en) * | 2018-05-03 | 2018-11-13 | 南京理工大学 | A kind of π types mixed excitation biconvex pole motor T |
| CN110611413A (en) * | 2019-11-01 | 2019-12-24 | 南京航空航天大学 | Multiphase disc type hybrid excitation flux switching motor |
| CN114079328A (en) * | 2020-08-10 | 2022-02-22 | 中车株洲电力机车研究所有限公司 | Mixed excitation axial flux motor |
| CN114285194A (en) * | 2022-01-07 | 2022-04-05 | 郑州轻工业大学 | Armature coil strides extremely winding's doubly salient pole machine of electricity excitation |
| CN114285193A (en) * | 2022-01-07 | 2022-04-05 | 郑州轻工业大学 | Novel bipolar flux linkage hybrid excitation doubly salient motor |
| CN114389410A (en) * | 2022-01-07 | 2022-04-22 | 郑州轻工业大学 | Material-saving consumption-reducing type induction coil winding method |
| US20240235286A1 (en) * | 2022-03-16 | 2024-07-11 | Jiangsu University | Single winding hybrid excitation magnetic field modulation motor and synergy excitation design method thereof |
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| CN114079328A (en) * | 2020-08-10 | 2022-02-22 | 中车株洲电力机车研究所有限公司 | Mixed excitation axial flux motor |
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| CN114285193A (en) * | 2022-01-07 | 2022-04-05 | 郑州轻工业大学 | Novel bipolar flux linkage hybrid excitation doubly salient motor |
| CN114389410A (en) * | 2022-01-07 | 2022-04-22 | 郑州轻工业大学 | Material-saving consumption-reducing type induction coil winding method |
| US20240235286A1 (en) * | 2022-03-16 | 2024-07-11 | Jiangsu University | Single winding hybrid excitation magnetic field modulation motor and synergy excitation design method thereof |
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