CN106451979B - Magnetic-field modulation-type mixed excitation electric machine - Google Patents
Magnetic-field modulation-type mixed excitation electric machine Download PDFInfo
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- CN106451979B CN106451979B CN201510474238.2A CN201510474238A CN106451979B CN 106451979 B CN106451979 B CN 106451979B CN 201510474238 A CN201510474238 A CN 201510474238A CN 106451979 B CN106451979 B CN 106451979B
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Abstract
The invention discloses a kind of magnetic-field modulation-type mixed excitation electric machines, including stator and rotor, wherein stator includes stator core and winding, winding includes exchange armature winding and DC excitation winding, stator core is designed as open slot, exchange armature winding and DC excitation winding are arranged in the open slot of stator core, rotor includes rotor core and rotor permanent magnet, rotor permanent magnet is fixedly installed in rotor core, wherein, the magnetic field that exchange armature winding is generated with rotor permanent magnet and DC excitation winding simultaneously interacts.The magnetic-field modulation-type mixed excitation electric machine provided through the invention, enhances the controllability of air-gap field, extends the speed adjustable range of motor；By the way that armature winding and excitation winding to be all placed in stator, so that rotor portion is only by iron core and set of permanent magnets at avoiding caused structural complexity when winding is placed in rotor portion, improve the reliability of motor operation, be also conducive to the heat dissipation of machine winding.
Description
Technical field
The present invention relates to brushless synchronous machine field more particularly to a kind of magnetic-field modulation-type mixed excitation electric machines.
Background technique
Motor is driving part important in modern industry, and the performance for improving motor has important meaning for industrial expansion
Justice.Compared to the asynchronous machine being widely used, permanent magnet synchronous motor has low-loss, high power density and High Power Factor
The advantages that.With the development of high performance permanent magnetic materials, the performance of permanent magnet synchronous motor is also continuously improved, to motor performance have compared with
The field of high request, permanent magnet synchronous motor are just obtaining increasingly extensive application.
The air-gap field of traditional permanent magnet synchronous motor is mainly generated by permanent magnet, due to permanent magnet performance-adjustable not
By force, thus the speed adjustable range of motor is limited.To solve this problem, mixed excitation electric machine is learned by lot of domestic and foreign expert
Person is proposed.In mixed excitation electric machine, air-gap field is generated simultaneously by permanent magnet and excitation winding, thus enhances mixing
The performance-adjustable of the magnetic field strength of excitation electromotor, while mixed excitation electric machine remains the high power density of permanent magnet synchronous motor
The advantages that.However, the structure of mixed excitation electric machine is usually more complicated compared to traditional permanent magnet synchronous motor, it is difficult increasing production
The operational reliability of motor is also reduced while spending.
The basic functional principle of magnetic-field modulation-type magneto is by placing adjustable magnetic iron block in air gap come so that air gap
Magnetic permeability becomes unevenly, so that air-gap field be made to generate the harmonic component of certain number of pole-pairs, machine winding can pass through this
A little harmonic components and rotor interact, and achieve the purpose that torque transfer and speed change.
Summary of the invention
The purpose of the present invention is to provide a kind of magnetic-field modulation-type mixed excitation electric machines, to improve existing mixed excitation electric machine
The disadvantage low with reliability that structure is complicated.
The present invention in order to solve the above-mentioned technical problem, the technical solution adopted is that: a kind of magnetic-field modulation-type composite excitation electricity
Machine, including stator and rotor, wherein the stator includes stator core and winding, the winding is including exchange armature winding and directly
Excitation winding is flowed, the stator core is designed as open slot, and the exchange armature winding and DC excitation winding setting exist
In the open slot of the stator core, the rotor includes rotor core and rotor permanent magnet, and the rotor permanent magnet is solid
Surely it is set in the rotor core, wherein the exchange armature winding is encouraged with the rotor permanent magnet and the direct current simultaneously
The magnetic field that magnetic winding generates interacts.
Preferably, the stator core and the rotor core are formed by Alveolus type silicon steel plate packing, the rotor core
It is designed as open slot.
Preferably, the number of pole-pairs of the DC excitation winding is equal with the number of teeth of the stator core.
Preferably, the magnetic-field modulation-type mixed excitation electric machine be rotating electric machine, the stator core along the circumferential direction and
It slots close to the side of the rotor.
Preferably, the rotor permanent magnet magnetizes in the radially outward direction or magnetizes along radial inward direction.
Preferably, the sum of the number of pole-pairs and the number of teeth of the stator core of the exchange armature winding are equal to the rotor iron
The number of teeth of the heart, the number of poles of the rotor permanent magnet are equal with the number of teeth of the rotor core.
It preferably, further include stator permanent magnet, the teeth portion top of the stator core, institute is arranged in the stator permanent magnet
The number of pole-pairs for stating stator permanent magnet is equal to the number of teeth of the stator core.
Preferably, the magnetic-field modulation-type mixed excitation electric machine is linear motor, and the stator core is along perpendicular to described
Rotor downwardly direction is simultaneously slotted close to the side of the rotor.
Preferably, the rotor permanent magnet edge is magnetized perpendicular to the rotor upwardly direction or along perpendicular to described turn
Sub- downwardly direction magnetizes.
Preferably, in the stator length, the number of pole-pairs of the exchange armature winding and the number of teeth of the stator core
The sum of be equal to the number of teeth of the rotor core, the number of poles of the rotor permanent magnet is equal with the number of teeth of the rotor core.
The implementation of the embodiments of the present invention has the following beneficial effects: the magnetic-field modulation-type composite excitation provided through the invention
Motor generates air-gap field by permanent magnet and excitation winding electric current jointly, enhances the controllability of air-gap field, extend electricity
The speed adjustable range of machine；It is adjusted by direction to exciting current and size, it can realize the adjusting to air-gap field, from
And adapt to the needs of motor difference operating status；In addition, by the way that armature winding and excitation winding are all placed in stator, so that turning
Subdivision is only by iron core and set of permanent magnets at avoiding caused structural complexity when winding is placed in rotor portion, improve
The reliability of motor operation is also conducive to the heat dissipation of machine winding.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the structural schematic diagram for the magnetic-field modulation-type mixed excitation electric machine that one embodiment of the invention provides；
Fig. 2 be another embodiment of the present invention provides magnetic-field modulation-type mixed excitation electric machine structural schematic diagram；
Fig. 3 is the structural schematic diagram for the magnetic-field modulation-type mixed excitation electric machine that yet another embodiment of the invention provides.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Fig. 1 is the structural schematic diagram for the magnetic-field modulation-type mixed excitation electric machine that one embodiment of the invention provides.Such as Fig. 1 institute
Show, magnetic-field modulation-type mixed excitation electric machine is rotating electric machine, including the stator that is made of stator core 110 and winding 120 and by
The rotor of rotor core 130 and rotor permanent magnet 140.Wherein, stator core 110 is designed as open slot, along the circumferential direction and leans on
The side fluting of nearly rotor.Winding 120 includes exchange armature winding 122 and DC excitation winding 124, exchanges armature winding 122
It is arranged in the open slot of stator core 110 with DC excitation winding 124.Rotor core 130 is designed as open slot.Rotor permanent magnet
Body 140 is fixedly installed in rotor core 130.
Further, in an embodiment of the present invention, stator core 110 and rotor core 130 are by Alveolus type silicon steel sheet stack
It makes.
Further, in an embodiment of the present invention, the tooth of the number of pole-pairs of DC excitation winding 124 and stator core 110
Number is equal, and the number of teeth sum of the two of the number of pole-pairs and stator core 110 that exchange armature winding 122 is equal to the tooth of rotor core 130
Number, the number of poles of rotor permanent magnet 140 are equal with the number of teeth of rotor core 130.
Further, in an embodiment of the present invention, the magnetizing direction of rotor permanent magnet 140 is identical, all outside along radius
It magnetizes or all magnetizes along radial inward direction in direction.
Specifically, at work, being passed through exchange in the exchange armature winding 122 of magnetic-field modulation-type mixed excitation electric machine
Electricity generates the rotating excitation field that fundamental wave number of pole-pairs is P (P is the number of pole-pairs for exchanging armature winding 122), due to M stator core 110
The presence of teeth portion lead to non-uniform air-gap, so that the rotating excitation field for exchanging armature winding 122 is generated number of pole-pairs Z, (Z is rotor iron
The number of teeth of the heart 130, equal to the number of poles of rotor permanent magnet 140) harmonic component, due to the harmonic component and rotor permanent magnet 140
Fundamental wave magnetic field number of pole-pairs having the same, allow exchange armature winding 122 and rotor permanent magnet 140 interact；Class
As, rotor permanent magnet 140 generates the magnetic field that fundamental wave number of pole-pairs is Z, since the presence of the teeth portion of M stator core 110 causes
Non-uniform air-gap generates the harmonic component that number of pole-pairs is P, due to the harmonic component with to exchange armature winding 122 having the same
Number of pole-pairs, again such that exchange armature winding 122 and rotor permanent magnet 140 interact.
When being passed through electric current forward or backwards in DC excitation winding 124, the magnetic field that fundamental wave number of pole-pairs is M is generated, by
It is much higher than the magnetic conductivity of rotor permanent magnet 140 in the magnetic conductivity of the teeth portion of Z rotor core 130, so that non-uniform air-gap, thus
Make DC excitation winding 124 generate magnetic field generate number of pole-pairs P harmonic component, due to the harmonic component with exchange armature around
122 numbers of pole-pairs having the same of group allow DC excitation winding 124 to interact with armature winding 122 is exchanged；It is similar
Ground, the rotating excitation field that the fundamental wave number of pole-pairs generated after being passed through alternating current in exchange armature winding 122 is P, in rotor core 130
Teeth portion modulating action under, the harmonic component that number of pole-pairs is M is generated, since the harmonic component and DC excitation winding 124 have
There is identical number of pole-pairs, again such that DC excitation winding 124 can interact with armature winding 122 is exchanged.
From the above mentioned it is found that by magnetic field modulation principle, exchange armature winding 122 can simultaneously with rotor permanent magnet 140
And the magnetic field that DC excitation winding 124 generates interacts, therefore, the air-gap field of magnetic-field modulation-type mixed excitation electric machine is by turning
The exciting current of sub- permanent magnet 140 and DC excitation winding 124 codetermines.It is carried out by direction to exciting current and size
It adjusts, it can the adjusting to air-gap field is realized, to make the needs for adapting to motor difference operating status.
Fig. 2 be another embodiment of the present invention provides magnetic-field modulation-type mixed excitation electric machine structural schematic diagram.Fig. 2 will be tied
Fig. 1 description is closed, in fig. 1 and 2, the element of identical label function having the same, details are not described herein.As shown in Fig. 2, magnetic
Field modulation system mixed excitation electric machine is rotating electric machine, unlike magnetic-field modulation-type mixed excitation electric machine shown in FIG. 1, magnetic field
Modulation system mixed excitation electric machine further includes the stator permanent magnet 150 that the teeth portion top of stator core 110 is arranged in, wherein stator
The number of pole-pairs of permanent magnet 150 is equal to the number of teeth of stator core 110.By the way that stator core 110 is arranged in stator permanent magnet 150
Teeth portion top further improves the density of air-gap field, is conducive to the torque output for improving motor.
Fig. 3 is the structural schematic diagram for the magnetic-field modulation-type mixed excitation electric machine that yet another embodiment of the invention provides.Such as Fig. 3 institute
Show, magnetic-field modulation-type mixed excitation electric machine is linear motor, including the stator that is made of stator core 310 and winding 320 and by
(i.e. mover, effect is identical as the rotor in Fig. 1 and Fig. 2, for description side for the rotor of rotor core 330 and rotor permanent magnet 340
Just for the sake of, hereon referred to as rotor).Wherein, stator core 310 is designed as open slot, and edge is perpendicular to rotor downwardly direction and pastes
The side fluting of nearly rotor.Winding 320 includes exchange armature winding 322 and DC excitation winding 324, exchanges armature winding 322
It is arranged in the open slot of stator core 310 with DC excitation winding 324.Rotor core 330 is designed as open slot.Rotor permanent magnet
Body 340 is fixedly installed in rotor core 330.
Further, in an embodiment of the present invention, stator core 310 and rotor core 330 are by Alveolus type silicon steel sheet stack
It makes.
Further, in an embodiment of the present invention, the tooth of the number of pole-pairs of DC excitation winding 324 and stator core 310
Number is equal, and in stator length, the number of teeth sum of the two of the number of pole-pairs and stator core 310 that exchange armature winding 322, which is equal to, to be turned
The number of poles of the number of teeth of sub- iron core 330, rotor permanent magnet 340 is equal with the number of teeth of rotor core 330.
Further, in an embodiment of the present invention, the magnetizing direction of rotor permanent magnet 340 is identical, all along perpendicular to fixed
Sub- upwardly direction magnetizes or all edge is magnetized perpendicular to stator downwardly direction.
Magnetic-field modulation-type mixed excitation electric machine provided by the invention both may be used as motor, be also used as generator.
When it is as motor running, excitation winding is passed through DC current, generates the magnetic field relative to stationary rotor, and armature winding is logical
Enter alternating current, generate the magnetic field rotated relative to stator, due to the interaction in two magnetic field, rotor will be with when stable operation
Stator field rotates synchronously；On the other hand, when it runs as generator, excitation winding is passed through DC current, generates opposite
In the magnetic field of stationary rotor, and rotor rotates under the promotion of external mechanical force, and excitation field also rotates with it, thus in stator
Induced electromotive force is generated in winding
Advantageously, the magnetic-field modulation-type mixed excitation electric machine provided through the invention, by rotor permanent magnet and excitation winding
Electric current generates air-gap field jointly, enhances the controllability of air-gap field, extends the speed adjustable range of motor；By to excitation
Sense of current and size are adjusted, it can the adjusting to air-gap field are realized, to adapt to motor difference operating status
Needs；In addition, by the way that armature winding and excitation winding are all placed in stator so that rotor portion only by iron core and rotor forever
Magnet composition avoids caused structural complexity when winding is placed in rotor portion, improves the reliability of motor operation,
Conducive to the heat dissipation of machine winding.
Above disclosed is only a preferred embodiment of the present invention, cannot limit the power of the present invention with this certainly
Sharp range, those skilled in the art can understand all or part of the processes for realizing the above embodiment, and weighs according to the present invention
Benefit requires made equivalent variations, still belongs to the scope covered by the invention.
Claims (9)
1. a kind of magnetic-field modulation-type mixed excitation electric machine, which is characterized in that including stator and rotor, wherein the stator includes fixed
Sub- iron core and winding, the winding include that exchange armature winding and DC excitation winding, the stator core are designed as open slot,
The exchange armature winding and the DC excitation winding are arranged in the open slot of the stator core, the rotor packet
Rotor core and rotor permanent magnet are included, the rotor permanent magnet is fixedly installed in the rotor core, wherein the alternating current
The magnetic field that pivot winding is generated with the rotor permanent magnet and the DC excitation winding simultaneously interacts；
The number of pole-pairs of the DC excitation winding is equal with the number of teeth of the stator core；
The sum of number of pole-pairs and the number of teeth of the stator core of the exchange armature winding are equal to the number of teeth of the rotor core.
2. magnetic-field modulation-type mixed excitation electric machine according to claim 1, which is characterized in that the stator core and described
Rotor core is formed by Alveolus type silicon steel plate packing, and the rotor core is designed as open slot.
3. magnetic-field modulation-type mixed excitation electric machine according to claim 1, which is characterized in that the magnetic-field modulation-type mixing
Excitation electromotor is rotating electric machine, and the stator core along the circumferential direction and close to the side of the rotor is slotted.
4. magnetic-field modulation-type mixed excitation electric machine according to claim 3, which is characterized in that the rotor permanent magnet is along half
Radial external direction magnetizes or magnetizes along radial inward direction.
5. magnetic-field modulation-type mixed excitation electric machine according to claim 3, which is characterized in that the pole of the rotor permanent magnet
Number is equal with the number of teeth of the rotor core.
6. magnetic-field modulation-type mixed excitation electric machine according to claim 3, which is characterized in that it further include stator permanent magnet,
The teeth portion top of the stator core is arranged in the stator permanent magnet, and the number of pole-pairs of the stator permanent magnet is equal to the stator
The number of teeth of iron core.
7. magnetic-field modulation-type mixed excitation electric machine according to claim 1, which is characterized in that the magnetic-field modulation-type mixing
Excitation electromotor is linear motor, and the stator core is along perpendicular to the rotor downwardly direction and close to the side of the rotor
Fluting.
8. magnetic-field modulation-type mixed excitation electric machine according to claim 7, which is characterized in that the rotor permanent magnet is along vertical
It directly magnetizes in the rotor upwardly direction or along magnetizing perpendicular to the rotor downwardly direction.
9. magnetic-field modulation-type mixed excitation electric machine according to claim 7, which is characterized in that in the stator length,
The number of poles of the rotor permanent magnet is equal with the number of teeth of the rotor core.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510474238.2A CN106451979B (en) | 2015-08-05 | 2015-08-05 | Magnetic-field modulation-type mixed excitation electric machine |
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| CN201510474238.2A CN106451979B (en) | 2015-08-05 | 2015-08-05 | Magnetic-field modulation-type mixed excitation electric machine |
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| CN106451979A CN106451979A (en) | 2017-02-22 |
| CN106451979B true CN106451979B (en) | 2019-11-19 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108631463B (en) * | 2017-03-16 | 2024-03-05 | 上海艾高实业有限公司 | Polygonal excitation permanent magnet motor |
| CN108667258A (en) * | 2018-03-29 | 2018-10-16 | 刘法锐 | A kind of magnetically confined to linear unicoil Multiple coil power generator |
| CN108894875B (en) * | 2018-03-29 | 2020-10-20 | 李�杰 | Linear power generation device actuated by high-pressure gas |
| GB2594574B (en) * | 2020-03-24 | 2022-12-21 | Univ Jiangsu | Hybrid Excitation Field Modulated Motor and Design Method of Multi-Working Harmonics Thereof |
| CN111786527B (en) * | 2020-06-28 | 2022-06-07 | 南京师范大学 | Excitation compensation type hybrid magnetic source magnetic field modulation motor |
| CN112398302B (en) * | 2020-12-10 | 2023-09-12 | 沈阳工业大学 | Mixed excitation synchronous motor with wide speed regulation range |
| CN113904517A (en) * | 2021-11-03 | 2022-01-07 | 辽宁工程技术大学 | Direct-current excitation type magnetic field modulation motor |
| CN116207892B (en) * | 2023-05-04 | 2023-07-11 | 成都理工大学 | Mixed excitation motor |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103647423A (en) * | 2013-11-28 | 2014-03-19 | 江苏大学 | Stator and rotor permanent magnet-type vernier motor |
| CN104184230A (en) * | 2014-09-12 | 2014-12-03 | 东南大学 | High-reliability mixed excitation fault-tolerant motor system |
| CN104600881A (en) * | 2015-01-09 | 2015-05-06 | 南京航空航天大学 | Motor for directly driving electric drum |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001275321A (en) * | 2000-03-27 | 2001-10-05 | Shr Ltd Bvi | Inductor type ac power generator |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103647423A (en) * | 2013-11-28 | 2014-03-19 | 江苏大学 | Stator and rotor permanent magnet-type vernier motor |
| CN104184230A (en) * | 2014-09-12 | 2014-12-03 | 东南大学 | High-reliability mixed excitation fault-tolerant motor system |
| CN104600881A (en) * | 2015-01-09 | 2015-05-06 | 南京航空航天大学 | Motor for directly driving electric drum |
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