CN201549999U - Axial flux switching type hybrid excitation synchronous generator - Google Patents

Axial flux switching type hybrid excitation synchronous generator Download PDF

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Publication number
CN201549999U
CN201549999U CN 200920189390 CN200920189390U CN201549999U CN 201549999 U CN201549999 U CN 201549999U CN 200920189390 CN200920189390 CN 200920189390 CN 200920189390 U CN200920189390 U CN 200920189390U CN 201549999 U CN201549999 U CN 201549999U
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CN
China
Prior art keywords
stator
rotor
permanent magnet
winding
synchronous generator
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Expired - Fee Related
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CN 200920189390
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Chinese (zh)
Inventor
刘细平
杨杰
任志斌
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Jiangxi University of Science and Technology
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Jiangxi University of Science and Technology
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Priority to CN 200920189390 priority Critical patent/CN201549999U/en
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Publication of CN201549999U publication Critical patent/CN201549999U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model relates to the generator technique, in particular to an axial flux switching type hybrid excitation synchronous generator which has the advantages of high efficiency, direct drive and variable speed constant frequency. The utility model comprises a stator and a rotator; the stator is in a circular shape consisting of 6a H-shaped unit stator cores, in which a is a positive integer; an armature winding adopts a concentrated winding which is circumferentially wound on the stator teeth adjacent to the H-shaped unit stator cores; permanent magnets, which are magnetized tangentially, are arranged between H-shaped unit stator cores crossly; an excitation winding is wound on the surface of the permanent magnet axially and supplies a circumferential magnetic filed with a direct current in the excitation winding so as to enhance or weaken the permanent magnetic field; the rotator comprises a rotator magnet yoke and a rotator pole fixed on the inside thereof. The utility model is a new hybrid excitation synchronous generator which has the advantages of high efficiency, direct drive and wide voltage regulation scope.

Description

Axial magnetic flux switching type mixed excitation synchronous generator
Technical field
The utility model relates to generator techniques, the axial magnetic flux switching type mixed excitation synchronous generator of particularly a kind of high efficiency, direct driving, variable speed constant frequency.
Background technology
There is not winding on the permanent magnet machine rotor, simple in structure, so motor do not have excitation loss, and efficient height, reliable operation; Rare earth permanent-magnetic material coercive force and residual flux density height are so rare-earth permanent-magnet electric machine also has characteristics such as power density height, performance be good; Yet magnetic field can not be adjusted to and be the bottleneck of this type of motor as generator and motor applications.
Mixed excitation electric machine is a fluxoid controllable type permagnetic synchronous motor, because the existence of additive excitation winding, mixed excitation electric machine can not only be inherited the plurality of advantages of magneto, but and magnetic field flexible, be particularly suitable for constant voltage generating and permanent power wide range speed control and drive, have broad application prospects in fields such as wind power generation, Aero-Space, industrial transmission and electric automobiles.In recent years, the continuous effort through domestic and international motor expert has proposed the mixed excitation electric machine of various topological structures forms such as magnetic pole partition type, Lundell, combined rotor formula, parallel construction formula, magnetic shunt formula in succession, and has obtained certain achievement in research.More than permanent magnet in several mixed excitation electric machines all be positioned on the rotor, belong to rotor permanent-magnet type mixed excitation electric machine, often need rotor is taked special ancillary method, as stainless steel collar etc. is installed fixes permanent magnet, therefore increased the complexity of rotor structure, the motor cooling condition is poor simultaneously, the heat radiation difficulty, and higher temperature rise may cause permanent magnet generation irreversible demagnetization, the power density of motor etc. is exerted oneself, reduced to the restriction motor, restricted the further raising of this type of mixed excitation electric machine performance.
The magneto flux switch motor is a kind of stator permanent magnetic type double salient-pole electric machine, and rotor structure is simple; Along with the variation of rotor-position, magnetic flux can switching path automatically, so that the size and Orientation of magnetic linkage all changes in the stator winding, thereby produces the induced electromotive force of alternation.With respect to rotor permanent-magnet type magneto, not only there is not permanent magnet but also do not have winding on the magnetic pass switching electromotor rotor, have that volume is little, in light weight, reliable operation, cooling are convenient, high power density and higher advantages such as efficient.Yet, in the magneto magnetic pass switching electromotor,, there is the big and fault demagnetization difficulty of voltage regulation during as generator owing to adopt the permanent magnet excitation mode can't directly change magnetic field intensity, be difficult to realize shortcomings such as weak magnetic speed-up, output-constant operation narrow range during as motor.
For the advantage of comprehensive magneto and electric excitation type flux switch motor, French scholar E.Hoang proposed the Magneticflux-switching type composite excitation motor in 07 year.Compare with the magneto magnetic pass switching electromotor, this motor has increased excitation winding in the permanent magnet end, regulates air gap flux density by the size and Orientation of control exciting current, permanent magnetic field is played the effect that increases magnetic or degaussing.Owing to have two magnetic potential sources simultaneously, both magnetic flux paths intercouple, influence each other.There is the problem of two aspects in this motor: (1) permanent magnet flux constitutes the loop through the stator core of magnet exciting coil end, has reduced the utilance of permanent magnet; (2) along with the increase of exciting current, when the electric excitation magnetic line of force was consistent with the permanent magnet magnetization direction, magnetic saturation aggravated the corresponding rising of iron loss and leakage field in the stator core of magnet exciting coil end.
The utility model content
Technical problem to be solved in the utility model provides the comparatively broad axial magnetic flux switching type mixed excitation synchronous generator of a kind of high power density, voltage-regulation scope.
Technical scheme: a kind of axial magnetic flux switching type mixed excitation synchronous generator, comprise stator and rotor, stator 1 is assembled into circle by 6a " H " type unit stator core 5, a is a positive integer, armature winding 7 adopts concentrates winding, circumferentially be wrapped on the stator tooth 9 of adjacent " H " type unit stator core, permanent magnet 6 is staggered between adjacent " H " type unit stator core 5, the permanent magnet cutting orientation magnetizing, excitation winding 8 axially is wrapped in the surface of permanent magnet 6, the direct current that feeds in the excitation winding produces Circumferential field, strengthens or weaken permanent magnetic field; Rotor 2 adopts tray type structure, comprises rotor yoke 4 and is fixed in its inboard rotor pole 3, the coaxial installation of rotor and stator.
Motor stator, rotor be the 6a/5a structure very, and a is a positive integer.
Permanent magnet 6 is selected Nd-Fe-Bo permanent magnet material for use.
A gets 2, and stator 1 is assembled into circle by 12 " H " types unit stator core 5.
A gets 2, and stator poles is 12, and the rotor number of poles is ten.
Axial magnetic flux switching type mixed excitation synchronous generator of the present utility model is made up of a stator and two rotors, and stator is assemblied to form by several " H " type unit stator cores, and is simple in structure; Armature winding looses and is embedded in the adjacent stators unit core that is separated by permanent magnet, adopts and concentrates winding; Permanent magnet replaces cutting orientation magnetizing; Excitation winding axially is wrapped in permanent magnet surfaces, makes motor become a kind of brushless AC motor, and described permanent magnet is selected Nd-Fe-Bo permanent magnet material for use; Main field is axial distribution in the motor, helps motor radiating, reduces heat waste, further improves electric efficiency.Rotor is made up of rotor pole, rotor yoke, motor shaft etc., adopts tray type structure; Motor shaft adopts non-magnetic conductive steel; Two rotors of motor are identical, all adopt permeability magnetic material to make, and do not have winding on the rotor, and are simple in structure, are easy to make.
The concrete operation principle of motor is as follows:
During excitation-free current, it is an axial magnetic flux switching type magneto that motor can be regarded as, air-gap field is mainly set up by permanent magnet, principle according to motor magnetic circuit magnetic resistance minimum, machine operation is in the magnetic flux switching state, overwhelming majority magnetic fluxs are set out by the permanent magnet N utmost point, through " H " type unit stator core, air gap, rotor pole, rotor yoke, the adjacent rotors utmost point, air gap, adjacent " H " type unit stator core, return the permanent magnet S utmost point.This part magnetic flux participates in the power conversion of motor, is the main flux of motor.When rotor turns over two adjacent " H " type stator units iron cores, angle from magnetic circuit, flux switch motor magnetic circuit experience one-period, the magnetic flux that pass armature winding this moment also experiences one-period, be respectively that magnetic flux passes armature winding and magnetic flux enters armature winding, therefore, the induced electromotive force in the armature winding also changes one-period.
When motor passes to the DC excitation electric current, the magnetic circuit of motor and and the magnetic flux path of permanent magnet when working independently identical, when exciting current greater than zero the time, the synthetic air-gap field of motor strengthens, effective magnetic linkage of armature winding linkage increases, the also corresponding raising of induced electromotive force, at this moment, exciting current rises permanent magnet and increases magnetic action; In like manner, when exciting current less than zero the time, the synthetic air-gap field of motor is weakened, effective magnetic linkage of armature winding linkage reduces, the also corresponding reduction of winding induced electromotive force, at this moment, exciting current plays weak magnetic action to permanent magnet.
Beneficial effect: because the DC excitation winding places by in permanent magnet and the formed zone of " H " type unit stator core space availability ratio height, compact conformation; Simultaneously, because of excitation winding axially places stator interior, cause every circle magnet exciting coil length to shorten greatly, and winding overhang is less, thereby excitation winding resistance and excitation loss are reduced, electric efficiency is improved; Because the stator core volume can suitably be adjusted according to the required magnet exciting coil number of turn, flexibility is good; Stator adopts the structure of being made up of several " H " type unit stator cores, simplified manufacturing technique greatly; Rotor adopts tray type structure, and no winding is simple in structure, the reliability height; The motor heat load is lower, and thermal diffusivity is better, can further reduce the thermal losses of motor, improves efficiency of motor; The size and Orientation of control exciting current can realize that air-gap field regulates freely, and can rationally arrange the shared space proportion of permanent magnet and excitation winding according to actual needs, on the basis that guarantees the motor prime power, realize required magnetic field intensity and voltage-regulation scope.In sum, the utility model is owing to adopted principle that axial magnetic flux switches and excitation winding is placed in structure on the stator, no any winding on the rotor, successfully solved the defective of Magneticflux-switching type permanent magnet generator voltage-regulation, its adjustable magnetic effect is fairly obvious, has improved the adjusting function of voltage effectively.The new type composite excitation synchronous generator that the utility model is that a kind of efficient is higher, direct-driving type, voltage-regulation have a wide reach.
The utility model makes motor become a kind of stator permanent magnet generator by permanent magnet is designed on stator; With respect to the rotor permanent magnet-type motor, be the phenomenon that prevents that motor from causing permanent magnet to damage when rotating, need take some measures of reinforcing to permanent magnet, the stator permanent magnet generator just need not considered this situation, thereby can reduce the volume of motor, the power density of motor can obtain raising to a certain degree.
Description of drawings
Fig. 1 is the utility model structural representation;
Fig. 2 is that the utility model magnetic flux passes armature winding unit motor magnetic circuit schematic diagram;
Fig. 3 is that the utility model magnetic flux enters armature winding unit motor magnetic circuit schematic diagram.
1 stator among the figure, 2 rotors, 3 rotor poles, 4 rotor yokes, the unit stator core of 5 " H " type, 6 permanent magnets, 7 armature winding, 8 excitation winding, 9 stator tooths.
Embodiment
The utility model stator is different with the stator of common alternating current machine, stator is assembled into circle by the unit stator core of " H " type and is fixed on the motor housing, armature winding 7 looses and is embedded on the stator tooth of adjacent " H " type unit stator core, only provided the distribution mode of a concentrated winding on the motor stator among Fig. 1, remaining winding is not drawn.Permanent magnet is staggered to be embedded in the formed space of adjacent cells stator core, cutting orientation magnetizing, and excitation winding axially is wrapped in the surface of permanent magnet, space availability ratio height, compact conformation; In addition, the end of excitation winding is shorter, and the excitation loss of motor is less, and electric efficiency is improved.
Stator adopts the structure of being made up of the unit stator core of " H " type, and rotor adopts tray type structure, simplified manufacturing technique greatly.
By permanent magnet and excitation winding are arranged in the stator, make motor become a kind of brushless structure, thereby can improve the reliability of machine operation.
As shown in Figure 1, axial magnetic flux switching type mixed excitation synchronous generator mainly is made up of following components: stator 1, rotor 2, rotor pole 3, rotor yoke 4, " H " type unit stator core 5, permanent magnet 6, armature winding 7, excitation winding 8 etc.
The takeup type silicon steel sheets are adopted in " H " type unit stator core 5, can the axial and circumferential magnetic conductions, and material can be selected the thick 50W470 cold rolling non-orientation silicon steel of 0.5mm sheet for use.
Permanent magnet 6 directly sticks between adjacent " H " type unit stator core 5, two rotor axial complete matchings of motor, and be distributed in the both sides of stator symmetrically, stator and rotor coaxial are installed.Connect by bearing flexible between the stator and rotor.
Among Fig. 1, stator poles is 12, and the rotor number of poles is 10.
In addition, consider, select to have the material of the Nd-Fe-Bo permanent magnet material of higher HCJ and residual flux density as motor permanent magnet from improving motor gas-gap magnetic thermal stability close and permanent magnet.

Claims (5)

1. axial magnetic flux switching type mixed excitation synchronous generator, comprise stator and rotor, it is characterized in that: stator (1) is assembled into circle by 6a " H " type unit stator core (5), a is a positive integer, armature winding (7) adopts concentrates winding, circumferentially be wrapped on the stator tooth (9) of adjacent " H " type unit stator core, permanent magnet (6) is staggered in the middle of adjacent " H " type unit stator core (5), the permanent magnet cutting orientation magnetizing, excitation winding (8) axially is wrapped in the surface of permanent magnet (6), the direct current that feeds in the excitation winding produces Circumferential field, strengthens or weaken permanent magnetic field; Rotor (2) adopts tray type structure, comprises rotor yoke (4) and is fixed in its inboard rotor pole (3), the coaxial installation of rotor and stator.
2. axial magnetic flux switching type mixed excitation synchronous generator according to claim 1 is characterized in that: motor stator, rotor be the 6a/5a structure very, and a is a positive integer.
3. axial magnetic flux switching type mixed excitation synchronous generator according to claim 1 is characterized in that: permanent magnet (6) is selected Nd-Fe-Bo permanent magnet material for use.
4. axial magnetic flux switching type mixed excitation synchronous generator according to claim 1, it is characterized in that: a gets 2, and stator (1) is assembled into ring shape by 12 " H " type unit stator cores (5).
5. axial magnetic flux switching type mixed excitation synchronous generator according to claim 2, it is characterized in that: a gets 2, and stator poles is 12, and the rotor number of poles is ten.
CN 200920189390 2009-09-30 2009-09-30 Axial flux switching type hybrid excitation synchronous generator Expired - Fee Related CN201549999U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104539125A (en) * 2015-01-19 2015-04-22 上海电机学院 Mixed excitation flux switching motor
CN106787572A (en) * 2016-12-24 2017-05-31 大连碧蓝节能环保科技有限公司 Segmentation phase shift starts pole-changing windingses permasyn morot
CN108599508A (en) * 2018-06-10 2018-09-28 大连碧蓝节能环保科技有限公司 Pole-changing windings pawl pole disc type asynchronous motor
CN108599509A (en) * 2018-06-10 2018-09-28 大连碧蓝节能环保科技有限公司 Pole-changing windings pawl pole disc type hysteresis synchronous motor
CN108649763A (en) * 2018-06-01 2018-10-12 大连碧蓝节能环保科技有限公司 The double-deck mouse cage pawl pole disc type asynchronous motor
CN111181262A (en) * 2019-12-31 2020-05-19 郑州轻工业大学 Stator structure using built-in magnetic flux modulation ring of winding

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104539125A (en) * 2015-01-19 2015-04-22 上海电机学院 Mixed excitation flux switching motor
CN106787572A (en) * 2016-12-24 2017-05-31 大连碧蓝节能环保科技有限公司 Segmentation phase shift starts pole-changing windingses permasyn morot
CN106787572B (en) * 2016-12-24 2018-11-16 大连碧蓝节能环保科技有限公司 It is segmented phase shift and starts pole-changing windings permasyn morot
CN108649763A (en) * 2018-06-01 2018-10-12 大连碧蓝节能环保科技有限公司 The double-deck mouse cage pawl pole disc type asynchronous motor
CN108599508A (en) * 2018-06-10 2018-09-28 大连碧蓝节能环保科技有限公司 Pole-changing windings pawl pole disc type asynchronous motor
CN108599509A (en) * 2018-06-10 2018-09-28 大连碧蓝节能环保科技有限公司 Pole-changing windings pawl pole disc type hysteresis synchronous motor
CN111181262A (en) * 2019-12-31 2020-05-19 郑州轻工业大学 Stator structure using built-in magnetic flux modulation ring of winding
CN111181262B (en) * 2019-12-31 2020-12-08 郑州轻工业大学 Stator structure using built-in magnetic flux modulation ring of winding

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C14 Grant of patent or utility model
GR01 Patent grant
C17 Cessation of patent right
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20100811

Termination date: 20100930