CN104883019A - Stator permanent magnet mixed excitation vernier motor - Google Patents
Stator permanent magnet mixed excitation vernier motor Download PDFInfo
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- CN104883019A CN104883019A CN201510268915.5A CN201510268915A CN104883019A CN 104883019 A CN104883019 A CN 104883019A CN 201510268915 A CN201510268915 A CN 201510268915A CN 104883019 A CN104883019 A CN 104883019A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
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- Y02T10/64—Electric machine technologies in electromobility
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Abstract
The invention discloses a stator permanent magnet mixed excitation vernier motor, comprising a rotor and stators. Each stator comprises armature teeth, armature windings, excitation windings and permanent magnets. The armature teeth of each stator are coiled with a set of centralized excitation winding respectively. The armature windings are arranged in stator grooves. Outer peripheral tooth parts of each stator are provided with at least one V-type permanent magnet groove. The permanent magnets are arranged in the V-type permanent magnet grooves. The rotor is of a salient pole structure of an equal tooth width and comprises a plurality of salient poles. Air gaps are reserved between the rotor and the stators. According to the invention, a problem that the excitation windings of a traditional mixed excitation vernier motor are low in efficiency of magnetic field adjustment is solved, the speed regulation range of the motor is further expanded, and the magnetic congregate effect of the V-type permanent magnet array is utilized to improve the useful flux density and the power density of the motor. In addition, the stator of the stator permanent magnet mixed excitation vernier motor is simple and firm in structure, an intermediate transmission link is omitted, and the direct connected with a moving part is achieved, so that the system efficiency is improved.
Description
Technical field
The present invention relates to permanent magnetism vernier motor, particularly stator permanent magnetic type composite excitation vernier motor, be applicable to wind power generation and electric automobile, belong to the technical field that New-type electric machine manufactures.
Background technology
Permanent magnetism vernier motor is a kind of new special motor based on basic magnetic gear magnetic field modulation effect work, and the armature field that high-revolving armature winding can be produced matches through ovennodulation and slow-revving permanent magnet rotating magnetic field.Thus, there is the feature of large torque density, be very suitable for needing the track traffic of large torque, Ship Propeling and electric automobile application scenario.But the permanent magnet of traditional permanent magnetism vernier motor is positioned on the rotor of motor, not only make the structure of rotor become comparatively complexity and reduce mechanical strength, simultaneously when motor runs, the temperature of the permanent magnet of rotation is also difficult to management and controls, and adds the risk of permanent magnet by thermal demagnetization.
On the other hand, similar with traditional magneto, after permanent magnetism vernier motor is made, its air-gap field is difficult to regulate, and then the speed adjustable range of motor is restricted, and for this problem, document IEEE Transaction on Magnetics, 47 (10): 4238-4241,2011 (A novel flux-controllable vernier permanent-magnet machine) propose a kind of rotor permanent magnet type composite excitation vernier motor.By introducing extra excitation winding, the speed adjustable range of this motor expands really, but it should be noted that, the permanent magnet of this motor be positioned on rotor, the problem of temperature rise of permanent magnet is not still effectively solved, simultaneously, what is more important is the permanent magnet of surface-mount type due to what adopt, magnetic resistance on useful flux path is very large, need to add very large exciting current and just can reach satisfied regulating effect, not only reduce the efficiency that excitation winding regulates motor-field like this, and greatly can increase the copper loss in excitation winding, reduce the efficiency of motor.Chinese invention patent application numbers 201410257708.5 discloses a kind of rotor with salient pole formula mixed excitation electric machine based on magnetic gear, and its permanent magnet is placed in the problem of permanent magnet temperature rise stator solving rotor permanent magnet type vernier motor.What its armature tooth still adopts is the permanent magnet of surface-mount type, the adjustable magnetic effect of excitation winding and efficiency is caused to be restricted, in addition, all need to add set of excitation winding for each block permanent magnet in this motor, and the number of poles of permanent magnet is higher often in vernier motor, this just needs to increase the number of teeth of stator and the number of excitation winding corresponding with it undoubtedly.So not only increase the copper loss of excitation winding, increase the difficulty of motor winding inserting simultaneously, and then reduce copper factor and the power density of motor.
Summary of the invention
The object of the invention is, for the deficiency of existing composite excitation vernier motor, propose a kind of stator permanent magnetic type composite excitation vernier motor, permanent magnet is placed on stator, can manage the temperature rise of permanent magnet and winding easily.Adopt the permanent magnet array of V-type simultaneously, reduce the magnetic resistance on the useful flux path of the generation of excitation winding, the adjustable magnetic efficiency of motor excitation winding is promoted greatly, expands the speed adjustable range of motor further.Meanwhile, utilize the poly-magnetic effect that the permanent magnet array of V-type produces, enhance the effective permanent magnet flux in motor, compared to the vernier motor of traditional surface-mount type, the power density of this motor has been got back lifting to a certain extent.
Specifically, the present invention takes following technical scheme to realize:
A kind of stator permanent magnetic type composite excitation vernier motor, comprises rotor and stator; Described stator comprises armature tooth, armature winding, excitation winding, permanent magnet, the armature tooth of each stator is wound with respectively a set of centralized excitation winding, armature winding is placed in stator slot, the periphery teeth portion of each stator is provided with the permanent magnet trough of at least one V-type, and described permanent magnet is placed in the permanent magnet trough of V-type; The salient-pole structure of the facewidth such as described rotor is, including some rotor with salient pole, is air gap between rotor and stator.
As a further improvement on the present invention, the number of pole-pairs Ps of described permanent magnet, armature winding number of pole-pairs Pw, rotor with salient pole number Nr, three meets relation: Pw=|Nr-Ps|.
As a further improvement on the present invention, centralized or distributed winding method chosen by described armature winding.
As a further improvement on the present invention, described rotor adopts straight trough or flume structure.
As a further improvement on the present invention, described stators and rotators part is pressed into by the silicon steel sheet stack with high magnetic permeability.
As a further improvement on the present invention, described permanent magnet selects rubidium iron boron or ferrite permanent-magnet materials.
Obtain the present invention by technique scheme and there is following beneficial effect:
1) permanent magnet in the present invention and winding are all positioned on stator, facilitate and manage the temperature of motor of the present invention, reduce permanent magnet and are heated the risk of irreversible demagnetization occurs, improve the reliability of motor.
2) the present invention adopts the permanent magnet array of V-type, on the one hand due to its poly-magnetic effect, effective permanent magnet flux of the present invention is increased greatly, improves the power density of motor.Adopt the permanent magnet array of V-type on the other hand, reduce the magnetic resistance on useful flux path, the regulating effect of excitation winding is improved greatly, improve the efficiency that it regulates motor-field, expand the speed adjustable range of motor, reduce the copper loss in excitation winding, improve the efficiency of motor.
3) permanent magnet in the present invention and winding are on stator, and the structure of rotor is simple and firm, can save middle transmission link, directly be connected with moving component, improve the efficiency of system.
4) the present invention can easily to excitation, the armature winding number of turn, and size of current carries out cooperation control, carries out efficiency optimization, realize optimum efficiency to motor, is suitable for the application scenario needing variable-speed operation on a large scale.
Accompanying drawing explanation
Fig. 1 is the structural representation of embodiment of the present invention motor;
Fig. 2 is the stator armature tooth teeth portion enlarged drawing of embodiment of the present invention motor;
Fig. 3 is embodiment of the present invention motor flux distribution when permanent magnet independent role;
Fig. 4 is embodiment of the present invention motor flux distribution when permanent magnet and excitation winding acting in conjunction;
Fig. 5 is the A phase armature winding magnetic linkage oscillogram of embodiment of the present invention motor under different exciting operating mode;
Fig. 6 is the A phase armature winding counter potential waveform figure of embodiment of the present invention motor under different exciting operating mode;
Fig. 7 is the comparison diagram of the adjustment back-emf amplitude of embodiment of the present invention motor and conventional hybrid excitation vernier motor.
Number in the figure title: 1-rotor; 2-stator; 3-armature winding; 4-excitation winding; 5-armature tooth; 6-permanent magnet; 7-rotor with salient pole; 8-permanent magnet trough.
Embodiment
Below with a concrete three phase electric machine, with reference to accompanying drawing, the design feature of motor of the present invention and beneficial effect are described in detail.
As shown in Figure 1-2, the invention discloses stator permanent magnetic type composite excitation vernier motor, comprise rotor 1 and stator 2, stator includes armature winding 3, excitation winding 4 and permanent magnet 6.Rotor 1 and stator 2 are pressed into by the silicon steel sheet stack of high magnetic permeability, and its rotor 1 such as is at the salient-pole structure of the facewidth, and including some salient poles 7, is air gap between rotor 1 and stator 2.Comprise armature tooth 5 in stator 2, each armature tooth is wound with respectively a set of centralized excitation winding 4.Armature winding 3 can concentrate according to concrete requirement employing or distributed connected mode is placed in stator slot, and described stator slot adopts semi-enclosed slot.The permanent magnet 6 of V-type is placed in the V-type permanent magnet trough 8 of stator 2 teeth portion.Rotor 1 of the present invention, except adopting traditional straight trough, can also take skewed rotor effectively suppress the fluctuation of the detent force of motor and promote the sine degree of back-emf.Stator 2 and rotor 1 part are pressed into by the silicon steel sheet stack of high magnetic permeability, and permanent magnet 6 can select the rubidium iron boron of high energy product or the ferrite permanent-magnet materials of cheapness according to the actual needs.
In order to clear elaboration the specific embodiment of the present invention, below in conjunction with the three phase electric machine in accompanying drawing, the present invention is illustrated, can see, each armature tooth is placed with 6 V-type permanent magnet trough, wherein the magnetizing direction of permanent magnet 6 as shown in Figure 2, every a pair V-type permanent magnet magnetizing direction is contrary, namely each armature tooth has 3 permanent magnets 6 to pole.Again owing to stator having 6 armature tooths, namely the number of pole-pairs Ps of permanent magnet is 18 in embodiments of the present invention.Rotor epirelief number of poles Nr is 20, and the number of pole-pairs Pw of winding is 2.Permanent magnet 6 number of pole-pairs, rotor 1 salient pole number and armature winding 3 number of pole-pairs three meet relation: Pw=|Nr-Ps|.Because the number of pole-pairs of armature winding 3 is 2, according to the theory of the star-like figure of the groove of Electrical Motor, the armature winding of the embodiment of the present invention is the same with excitation winding all adopts centralized winding to export to obtain maximum torque.
Embodiment of the present invention motor Distribution of Magnetic Field figure under pure permanent magnet excitation is given in Fig. 3, as seen from the figure, the permanent magnetic field of 18 pairs of poles is after the modulation of rotor with salient pole, 2 permanent magnetic fields to pole are defined in motor, just can with 2 pairs of Polar armature magnetic field interactions, the mudulation effect demonstrating vernier motor is in embodiments of the present invention effective.Can find out that the stator teeth that the permanent magnet array of V-type makes effective permanent magnet flux below V-type permanent magnet is assembled simultaneously, add effective permanent magnet flux, improve the power density of motor.
Fig. 4 gives the Distribution of Magnetic Field figure under excitation winding and permanent magnet acting in conjunction, as shown in the figure, reduce greatly compared to the magnetic flux in the stator tooth in Fig. 3, Fig. 4, this just illustrates that effective magnetic flux in embodiments of the present invention can be excited the magnetic field that winding produces and greatly weaken.Just can pass into exciting current when motor needs high-speed cruising to weaken magnetic field in motor in excitation winding, reduce the terminal voltage of armature winding, ensure the maximum terminal voltage that the terminal voltage of motor is no more than inverter and can provides.
Fig. 5 and Fig. 6 is the unloaded magnetic linkage waveform of A phase armature winding under pure permanent magnetism (i.e. pure permanent magnet excitation) and degaussing (namely passing into degaussing character direct current excitation and permanent magnet excitation acting in conjunction) these two kinds of operating modes and counter potential waveform figure respectively.Can see that, after having passed into exciting current, the magnetic linkage in the armature winding of motor and back-emf substantially reduce really, demonstrate embodiment of the present invention motor and there is adjustable magnetic ability, the needs of high speed operation of motor can be met.Fig. 7 compares the adjustable magnetic ability of embodiment of the present invention motor and traditional composite excitation vernier motor, can find out when not passing into electric current in excitation winding, when namely only having permanent magnet independent role, now the back-emf of embodiment of the present invention motor is approximately 1.5 times of conventional hybrid excitation vernier motor, this just illustrates compared to conventional motors, embodiment of the present invention motor has higher torque density, and this mainly benefits from the poly-magnetic effect of V-type permanent magnet in the present invention.Can find out, embodiment of the present invention motor has more excellent flux control ability simultaneously, and namely when passing into identical exciting current, it is more that its back-emf weakens.This is mainly due to compared to traditional composite excitation vernier motor, in the present invention, V-type permanent magnet array mode can reduce the magnetic resistance in useful flux path greatly, so just improve the adjustable magnetic ability of excitation winding, make motor of the present invention have more broad speed adjustable range.
To sum up, the permanent magnet 6 of vernier motor of the present invention and winding are all positioned on stator, make to become simply many to the temperature rise management of the winding of this motor and permanent magnet 6, reduce permanent magnet and are heated and cause the risk of irreversible demagnetization, improve the reliability of motor.Meanwhile, the permanent magnet 6 of V-type array makes effective permanent magnet flux of motor of the present invention greatly increase, and improves the power density of motor.Adopt permanent magnet 6 array of V-type on the other hand, reduce the magnetic resistance on useful flux path, improve the efficiency that excitation winding regulates motor-field, namely only need to pass into the magnetic field that relatively little exciting current just can weaken motor to a great extent, not only expand the speed adjustable range of motor further, turn reduce the copper loss in excitation winding simultaneously, improve the efficiency of motor.
Above to a kind of stator permanent magnetic type composite excitation vernier motor provided by the present invention, and to this has been detailed introduction, apply specific case herein to set forth principle of the present invention and execution mode, be noted that, the foregoing is only preferred embodiment of the present invention, not in order to limit the present invention.All any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. a stator permanent magnetic type composite excitation vernier motor, it is characterized in that, comprise rotor (1) and stator (2), described stator (2) comprises armature tooth (5), armature winding (3), excitation winding (4), permanent magnet (6), the armature tooth (5) of each stator (2) is wound with a set of centralized excitation winding (4) respectively, armature winding (3) is placed in stator slot, the periphery teeth portion of each stator (2) is provided with the permanent magnet trough of at least one V-type, described permanent magnet (6) is placed in the permanent magnet trough (8) of V-type, the salient-pole structure of the facewidth such as described rotor (1) is, including some rotor with salient pole (7), is air gap between rotor (1) and stator (2).
2. stator permanent magnetic type composite excitation vernier motor according to claim 1, it is characterized in that: the number of pole-pairs Ps of described permanent magnet (6), armature winding (3) number of pole-pairs Pw, rotor (1) salient pole number Nr, three meets relation: Pw=|Nr-Ps|.
3. stator permanent magnetic type composite excitation vernier motor according to claim 1, is characterized in that: centralized or distributed winding method chosen by described armature winding (3).
4. stator permanent magnetic type composite excitation vernier motor according to claim 1, is characterized in that: described rotor (1) adopts straight trough or flume structure.
5. stator permanent magnetic type composite excitation vernier motor according to claim 1, is characterized in that: described stator (2) and rotor (1) part are pressed into by the silicon steel sheet stack with high magnetic permeability.
6. stator permanent magnetic type composite excitation vernier motor according to claim 1, is characterized in that: described permanent magnet (6) selects rubidium iron boron or ferrite permanent-magnet materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510268915.5A CN104883019A (en) | 2015-05-22 | 2015-05-22 | Stator permanent magnet mixed excitation vernier motor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510268915.5A CN104883019A (en) | 2015-05-22 | 2015-05-22 | Stator permanent magnet mixed excitation vernier motor |
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| CN104883019A true CN104883019A (en) | 2015-09-02 |
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| CN201510268915.5A Pending CN104883019A (en) | 2015-05-22 | 2015-05-22 | Stator permanent magnet mixed excitation vernier motor |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105743246A (en) * | 2016-05-12 | 2016-07-06 | 张学义 | Electric automobile range extender embedded biradial permanent magnet and electromagnetic series-parallel generator |
| CN105811715A (en) * | 2016-05-12 | 2016-07-27 | 张学义 | Brushless electromagnetic generator equipped with built-in combined type radial permanent magnet rotor and dual claw poles |
| CN105811713A (en) * | 2016-05-12 | 2016-07-27 | 张学义 | Electromagnetic generator with invisible magnetic poles and salient poles for electric automobile extender |
| CN105914999A (en) * | 2016-05-13 | 2016-08-31 | 山东理工大学 | Electromagnet and built-in permanent magnet mixed excitation generating set with vacuum pump |
| CN106385153A (en) * | 2016-09-28 | 2017-02-08 | 华中科技大学 | Hybrid excitation Motor |
| CN109286255A (en) * | 2018-11-22 | 2019-01-29 | 武汉理工大学 | A kind of alternating pole permanent magnetism vernier motor based on T-type permanent magnet |
| CN109617267A (en) * | 2018-12-28 | 2019-04-12 | 江苏大学 | It is a kind of to split slot type magnetic field modulation magneto suitable for hybrid vehicle |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000350428A (en) * | 1999-04-16 | 2000-12-15 | Newage Internatl Ltd | Alternating current equipment |
| CN103997174A (en) * | 2014-06-11 | 2014-08-20 | 东南大学 | Rotor salient pole type hybrid excitation motor based on magnetic gear |
-
2015
- 2015-05-22 CN CN201510268915.5A patent/CN104883019A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000350428A (en) * | 1999-04-16 | 2000-12-15 | Newage Internatl Ltd | Alternating current equipment |
| CN103997174A (en) * | 2014-06-11 | 2014-08-20 | 东南大学 | Rotor salient pole type hybrid excitation motor based on magnetic gear |
Non-Patent Citations (2)
| Title |
|---|
| CHUNHUA LIU ETC: "A novel flux-controllable vernier permanent-magnet machine", 《IEEE TRANSACTIONS ON MAGNETICS》 * |
| L.XU ETC: ""Novel Hybrid Excitation Permanent Magnet Vernier Machines", 《2015 IEEE INTERNATIONAL MAGNETICS CONFERENCE (INTERMAG)》 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105743246A (en) * | 2016-05-12 | 2016-07-06 | 张学义 | Electric automobile range extender embedded biradial permanent magnet and electromagnetic series-parallel generator |
| CN105811715A (en) * | 2016-05-12 | 2016-07-27 | 张学义 | Brushless electromagnetic generator equipped with built-in combined type radial permanent magnet rotor and dual claw poles |
| CN105811713A (en) * | 2016-05-12 | 2016-07-27 | 张学义 | Electromagnetic generator with invisible magnetic poles and salient poles for electric automobile extender |
| CN105914999A (en) * | 2016-05-13 | 2016-08-31 | 山东理工大学 | Electromagnet and built-in permanent magnet mixed excitation generating set with vacuum pump |
| CN106385153A (en) * | 2016-09-28 | 2017-02-08 | 华中科技大学 | Hybrid excitation Motor |
| CN106385153B (en) * | 2016-09-28 | 2019-03-05 | 华中科技大学 | A kind of mixed excitation electric machine |
| CN109286255A (en) * | 2018-11-22 | 2019-01-29 | 武汉理工大学 | A kind of alternating pole permanent magnetism vernier motor based on T-type permanent magnet |
| CN109617267A (en) * | 2018-12-28 | 2019-04-12 | 江苏大学 | It is a kind of to split slot type magnetic field modulation magneto suitable for hybrid vehicle |
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Application publication date: 20150902 |
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