CN108964396A - Stator partition type replaces pole hybrid excitation motor - Google Patents

Stator partition type replaces pole hybrid excitation motor Download PDF

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Publication number
CN108964396A
CN108964396A CN201810913928.7A CN201810913928A CN108964396A CN 108964396 A CN108964396 A CN 108964396A CN 201810913928 A CN201810913928 A CN 201810913928A CN 108964396 A CN108964396 A CN 108964396A
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CN
China
Prior art keywords
stator
winding
excitation
excitation winding
permanent
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CN201810913928.7A
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Chinese (zh)
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CN108964396B (en
Inventor
李健
王凯
张建亚
刘闯
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Nanjing University of Aeronautics and Astronautics
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Nanjing University of Aeronautics and Astronautics
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K21/00Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/38Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with rotating flux distributors, and armatures and magnets both stationary
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K1/00Details of the magnetic circuit
    • H02K1/06Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12Stationary parts of the magnetic circuit
    • H02K1/17Stator cores with permanent magnets
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K21/00Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/02Details
    • H02K21/04Windings on magnets for additional excitation ; Windings and magnets for additional excitation
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K2213/00Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
    • H02K2213/03Machines characterised by numerical values, ranges, mathematical expressions or similar information

Abstract

Stator, rotor and stator where excitation winding where replacing pole hybrid excitation motor, including armature winding, excitation winding, permanent magnet, armature winding the invention discloses a kind of stator partition type.Stator where stator where armature winding and excitation winding is respectively provided at the two sides of rotor, and when stator is external stator where armature winding, stator where excitation winding is inner stator;When stator is external stator where excitation winding, stator where armature winding is inner stator.Number of stator teeth where armature winding is Nst, and number of stator teeth where excitation winding is Nst/3.The tooth top of stator tooth where excitation winding is towards rotor direction, and the tooth top of stator tooth has one or two permanent-magnet pole where each excitation winding, and the number of poles of formation is 3;Adjacent excitation winding permanent magnet on the stator teeth magnetizing direction it is opposite.The present invention, by the way that set of excitation winding is arranged on stator, realizes effective adjusting of air-gap field while solving permanent magnet and armature winding space limits.

Description

Stator partition type replaces pole hybrid excitation motor
Technical field
The present invention relates to field of motor manufacturing, especially a kind of stator partition type replaces pole hybrid excitation motor.
Background technique
Magneto has the characteristics that structure is simple, high-efficient and power density is big, has been widely used in household electrical appliances, electronic The occasions such as automobile, wind-power electricity generation and aerospace.
Different according to the placement position of permanent magnet, magneto can be divided into rotor permanent magnet type and stator permanent magnetic type.Stator is forever Magnetic-type motor is all located on stator as research hotspot in recent years, its permanent magnet and armature winding, and on rotor both without around Group is also without permanent magnet.It is reliable for operation since its structure is simple, it is easy to radiate, and also there is high power density, high efficiency, fault-tolerant The advantages that performance is good and load capacity is strong, thus have a good application prospect.
However, there is geometry for permanent magnet and armature winding just because of permanent magnet and armature winding are all disposed within stator side Conflict causes the available space of the two to be restricted.To limit torque density.
Therefore, (all to improve oneself) professors of Z. Q. Zhu et al. are in 2015 in IEEE TRANSACTIONS ON Paper " the Novel electrical machines having separate PM of the phase of volume 51 the 4th of MAGNETICS Excitation stator " and interim paper " the Novel doubly salient permanent magnet of volume 51 the 5th Machines with partitioned stator and iron pieces rotor " propose the stator of stator partition type Permanent magnet-type motor where armature winding is located at armature winding on stator, where permanent magnet is located at excitation winding on stator, solves The Steric clashes of armature winding and permanent magnet, improve torque density.
However, the magneto of stator partition type is also faced with the one of magneto because permanent magnetic field is stationary magnetic field A intrinsic problem, i.e. adjustable magnetic ability are limited.This is restricted the output-constant operation range of such motor.Although can use The mode of vector controlled, weakens air-gap field by applying negative direct-axis current component (- id) in armature winding, but by The limitation such as armature supply size, inverter capacity, speed adjustable range is very limited, and the efficiency and power factor (PF) in weak magnetic speed-up section It is lower.
Summary of the invention
In view of the above-mentioned deficiencies of the prior art, the technical problem to be solved by the present invention is to provide a kind of stator partition types to hand over For pole hybrid excitation motor, which, which replaces pole hybrid excitation motor, to solve permanent magnet and armature winding space limit While processed, by the way that set of excitation winding is arranged on stator, effective adjusting of air-gap field is realized.
In order to solve the above technical problems, the technical solution adopted by the present invention is that:
A kind of stator partition type alternating pole hybrid excitation motor, including armature winding, excitation winding, armature winding place stator, Stator and central axis where rotor, excitation winding;Rotor is connected with central axis.
Rotor includes circumferential alternately arranged rotor core block and non-magnetic piece, and rotor core block and non-magnetic piece of number Amount is equal to rotor number of poles p.
Stator and rotor core block are all made of permeability magnetic material and are made where stator, excitation winding where armature winding.
Stator where stator where armature winding and excitation winding is separately positioned on the two sides of rotor, determines where armature winding There is air gap one between son and rotor, there is between stator air gap two where rotor and excitation winding.
When stator is as external stator where armature winding, stator where excitation winding is inner stator;When excitation winding institute When stator is as external stator, stator where armature winding is then inner stator;The number of teeth of stator is Nst where armature winding, is encouraged The number of teeth of stator where magnetic winding is Nst/3;Adjacent excitation winding the current direction that is passed through of magnet exciting coil on the stator teeth On the contrary.
The tooth top of stator tooth where excitation winding is towards rotor direction, where each excitation winding on the tooth top of stator tooth One piece or two pieces of permanent magnets are nested with, one or two permanent-magnet pole, the pole that stator tooth top where each excitation winding is formed are formed Number is 3, all excitation windings the sum of permanent magnetism number of poles on the stator teeth and iron core number of poles be equal to it is fixed where excitation winding The number of poles Nsp of son, and Nsp=Nst;Adjacent excitation winding permanent magnet on the stator teeth magnetizing direction it is opposite.
It is respectively nested with one piece of permanent magnet in the middle part of the tooth top of stator tooth where each excitation winding, forms a permanent-magnet pole, forever The both sides of magnetic pole are iron core pole;Namely stator tooth where each excitation winding includes a permanent-magnet pole and two iron core poles.
Each nested one piece of permanent magnet in tooth top two sides of stator tooth where each excitation winding, forms two permanent-magnet poles, and two Stationary part forms an iron core pole where excitation winding between permanent-magnet pole;Namely stator tooth where each excitation winding wraps Include two permanent-magnet poles and an iron core pole;Adjacent excitation winding permanent magnet on the stator teeth magnetizing direction on the contrary, and same Excitation winding two pieces of permanent magnets on the stator teeth magnetizing direction it is identical.
Armature winding and excitation winding are all made of centralized winding.
Every phase armature winding is connected in series by Nst/m coil, and wherein m is number of motor phases.
Excitation winding is connected in series by Nst/3 coil.
The magnetic flux that excitation winding generates is by " iron core pole → two → rotor core of air gap block → one → armature winding of air gap Place stator core → one → rotor core of air gap block → stator core where two → excitation winding of air gap " is closed.
By being passed through positive exciting current in excitation winding, realizes and increase magnetic;It is passed through negative exciting current, realizes weak magnetic.
The invention has the following beneficial effects: the present invention by the way that set of excitation winding is arranged on stator, to make stator There are two excitation source (permanent magnet and excitation windings) for upper tool.It is passed through positive exciting current in excitation winding, may be implemented to increase magnetic; It is passed through negative exciting current in excitation winding, then is able to achieve weak magnetic.Moreover, the magnetic field that excitation winding of the invention generates (is encouraged Magnetic magnetic field) without permanent magnet, avoid the irreversible demagnetization of permanent magnet.In addition, excitation winding is located on stator, nothing is realized Brushization excitation.
Detailed description of the invention
Fig. 1 shows that a kind of stator partition type replaces stator tooth where excitation winding in pole hybrid excitation motor embodiment 1 The first structure chart.
Fig. 2 shows that a kind of stator partition type replaces stator tooth where excitation winding in pole hybrid excitation motor embodiment 1 Second of structure chart.
Fig. 3 shows a kind of adjustable magnetic effect diagram of stator partition type alternating pole hybrid excitation motor of the present invention.
Wherein have:
10. stator where armature winding;11. armature winding;
20. stator where excitation winding;21. permanent-magnet pole;22. excitation winding;23. iron core pole;
31. rotor core;32. non-magnetic piece.
Specific embodiment
Xia Mianjiehefutuhejuti compare Jia Shishifangshiduibenfamingzuojinyibuxiangxishuoming.
Embodiment 1
As depicted in figs. 1 and 2, a kind of stator partition type replaces pole hybrid excitation motor, including armature winding 11, excitation winding 22, stator 20 and central axis where stator 10, rotor, excitation winding where armature winding.
Stator where stator where armature winding and excitation winding is separately positioned on the two sides of rotor, determines where armature winding Son is used as external stator, and stator where excitation winding is inner stator.
There is between stator and rotor air gap one where armature winding, there is between stator gas where rotor and excitation winding Gap two.
Rotor can be connected by bearing with central axis, and central axis is motionless, form direct driving motor;Rotor can also be in Mandrel is fixedly connected, and drives central axis rotation.
Armature winding is preferably wound on armature winding institute on the stator teeth by the way of centralized coiling, it is assumed that armature around The quantity of stator tooth is Nst where group, and every phase armature winding is connected in series by Nst/m coil, and wherein m is number of motor phases.
Excitation winding is preferably wound on excitation winding institute on the stator teeth by the way of centralized coiling, adjacent excitation around Group the current direction that is passed through of excitation pitch of the laps on the stator teeth it is opposite.Excitation winding is connected in series by Nst/3 coil.
The present invention is with three-phase motor m=3, Nst=18, and for p=17, the present invention will be described in detail.
As depicted in figs. 1 and 2, there is threephase armature winding A, B and C on stator where armature winding;Every phase armature winding It is connected in series by 6 coils, such as A phase winding, is connected in series by A1-A6.Excitation winding is connected in series by 6 coils.
Rotor includes circumferential alternately arranged rotor core block 31 and non-magnetic piece 32, and rotor core block and non-magnetic piece It is equal in number in rotor number of poles p, namely be equal to 17.
Stator and rotor core block are all made of permeability magnetic material and are made where stator, excitation winding where armature winding.
The quantity of stator tooth where excitation winding is Nst/3, also as 6.
The tooth top of stator tooth where excitation winding is towards rotor direction, where each excitation winding on the tooth top of stator tooth One piece or two pieces of permanent magnets are nested with, one or two permanent-magnet pole, the pole that stator tooth top where each excitation winding is formed are formed Number is 3, stator where the sum of permanent magnetism number of poles and iron core number of poles where all excitation windings on stator are equal to excitation winding Number of poles Nsp, and Nsp=Nst;Permanent magnet is preferably by the way of radial direction or parallel magnetization, and adjacent excitation winding institute is on the stator teeth The magnetizing direction of permanent magnet is on the contrary, specifically see figure 1 and figure 2, and wherein arrow indicates magnetizing direction.
The stator poles of stator tooth preferably have the following two kinds to lay mode where excitation winding.
The first structure
As shown in Figure 1, being respectively nested with one piece of permanent magnet in the middle part of the tooth top of stator tooth where each excitation winding, a permanent magnetism is formed Pole, the both sides of permanent-magnet pole are iron core pole;Namely stator tooth where each excitation winding includes a permanent-magnet pole 21 and two Iron core pole 23, then stator where excitation winding has 6 permanent-magnet poles and 12 iron core poles.
Second of structure
As shown in Fig. 2, each nested one piece of permanent magnet in tooth top two sides of stator tooth where each excitation winding, forms two permanent magnetism Pole, stationary part forms an iron core pole where the excitation winding between two permanent-magnet poles;Namely it is fixed where each excitation winding Sub- tooth includes two permanent-magnet poles and an iron core pole;Then stator where excitation winding has 12 permanent-magnet poles and 6 iron core poles.
Adjacent excitation winding on the stator teeth permanent magnet magnetizing direction on the contrary, and same excitation winding where stator tooth On two pieces of permanent magnets magnetizing direction it is identical.
The adjustable magnetic ability of excitation winding is limited by magnetic resistance on its magnetic flux path.According to " magnetic resistance is minimum " principle, the magnetic line of force It is closed always by the smallest path of magnetic resistance.Since the magnetic resistance of permanent magnet is much larger than the magnetic resistance of iron core, excitation of the invention The magnetic flux that winding generates passes through " iron core pole → two → rotor core of air gap block → one → armature winding of air gap without permanent magnet Place stator core → one → rotor core of air gap block → stator core where two → excitation winding of air gap " is closed.Therefore, The adjustable magnetic ability of the existing good adjustable magnetic of the present invention also avoids permanent magnet caused by excitation field and irreversible demagnetization occurs.
In addition, realizing by being passed through positive exciting current in excitation winding and increasing magnetic;It is passed through negative exciting current, is realized Weak magnetic.
The invention has the following beneficial effects:
1, it using partition type stator, solves the space limitation of permanent magnet and armature winding, improves torque density.
2, the adjustable magnetic ability of excitation winding is limited by magnetic resistance on its magnetic flux path.According to " magnetic resistance is minimum " principle, magnetic force Line is closed always by the smallest path of magnetic resistance.Since the magnetic resistance of permanent magnet is much larger than the magnetic resistance of iron core, of the invention is encouraged The magnetic flux that magnetic winding generates without permanent magnet, by " iron core pole → two → rotor core of air gap block → one → armature of air gap around Stator core → one → rotor core of air gap block where group → stator core where two → excitation winding of air gap " is closed.Cause This, the adjustable magnetic ability of the existing good adjustable magnetic of the present invention also avoids permanent magnet caused by excitation field and irreversible demagnetization occurs.
3. by applying positive exciting current (increasing magnetic) and negative exciting current (weak magnetic), the adjusting effect of unloaded back-emf Fruit is specifically shown in Fig. 3.
3, stator where excitation winding of the invention, although and permanent-magnet pole and iron core pole be alternately arranged, contain The opposite permanent magnet of the direction of magnetization, therefore the problem of be magnetized there is no unipolarity leakage field and mechanical part.
4, excitation winding is located on stator, realizes non-brushing excitation.
5, motor of the present invention can not only make electric operation, but also can make generator operation.
Embodiment 2
Embodiment 2 is substantially the same manner as Example 1, the difference lies in that stator knot where stator where excitation winding and armature winding Structure swaps.Namely stator where excitation winding, as external stator, stator where armature winding is inner stator.
At this point, the specific structure of stator tooth is same as Example 1 where excitation winding, will not be described in great detail here.
The preferred embodiment of the present invention has been described above in detail, still, during present invention is not limited to the embodiments described above Detail a variety of equivalents can be carried out to technical solution of the present invention within the scope of the technical concept of the present invention, this A little equivalents all belong to the scope of protection of the present invention.

Claims (8)

1. a kind of stator partition type replaces pole hybrid excitation motor, it is characterised in that: including armature winding, excitation winding, armature Stator and central axis where stator, rotor, excitation winding where winding;Rotor is connected with central axis;
Rotor includes circumferential alternately arranged rotor core block and non-magnetic piece, and rotor core block and non-magnetic piece of quantity are equal Equal to rotor number of poles p;
Stator and rotor core block are all made of permeability magnetic material and are made where stator, excitation winding where armature winding;
Stator where stator where armature winding and excitation winding is separately positioned on the two sides of rotor, stator where armature winding with There is air gap one between rotor, there is between stator air gap two where rotor and excitation winding;
When stator is as external stator where armature winding, stator where excitation winding is inner stator;It is fixed where excitation winding When son is used as external stator, stator where armature winding is then inner stator;The number of teeth of stator where armature winding is Nst, excitation around The number of teeth of stator where group is Nst/3;Adjacent excitation winding the current direction that is passed through of magnet exciting coil on the stator teeth it is opposite;
The tooth top of stator tooth where excitation winding is nested on the tooth top of stator tooth where each excitation winding towards rotor direction There are one piece or two pieces of permanent magnets, form one or two permanent-magnet pole, the number of poles that stator tooth top where each excitation winding is formed is equal Be 3, all excitation windings the sum of permanent magnetism number of poles on the stator teeth and iron core number of poles be equal to excitation winding where stator Number of poles Nsp, and Nsp=Nst;Adjacent excitation winding permanent magnet on the stator teeth magnetizing direction it is opposite.
2. stator partition type according to claim 1 replaces pole hybrid excitation motor, it is characterised in that: each excitation winding It is respectively nested with one piece of permanent magnet in the middle part of the tooth top of place stator tooth, forms a permanent-magnet pole, the both sides of permanent-magnet pole are iron core pole; Namely stator tooth where each excitation winding includes a permanent-magnet pole and two iron core poles.
3. stator partition type according to claim 1 replaces pole hybrid excitation motor, it is characterised in that: each excitation winding Each nested one piece of permanent magnet in the tooth top two sides of place stator tooth, forms two permanent-magnet poles, the excitation winding between two permanent-magnet poles Place stationary part forms an iron core pole;Namely stator tooth where each excitation winding includes two permanent-magnet poles and an iron Heart pole;Adjacent excitation winding on the stator teeth permanent magnet magnetizing direction on the contrary, and same excitation winding institute on the stator teeth Two pieces of permanent magnets magnetizing direction it is identical.
4. stator partition type according to claim 1 replaces pole hybrid excitation motor, it is characterised in that: armature winding and encourage Magnetic winding is all made of centralized winding.
5. stator partition type according to claim 4 replaces pole hybrid excitation motor, it is characterised in that: every phase armature winding It is connected in series by Nst/m coil, wherein m is number of motor phases.
6. stator partition type according to claim 4 replaces pole hybrid excitation motor, it is characterised in that: excitation winding by Nst/3 coil is connected in series.
7. stator partition type according to claim 1 replaces pole hybrid excitation motor, it is characterised in that: excitation winding generates Magnetic flux be by " stator core → air gap one where one → armature winding of iron core pole → two → rotor core of air gap block → air gap → rotor core block → stator core where two → excitation winding of air gap " is closed.
8. stator partition type according to claim 1 replaces pole hybrid excitation motor, it is characterised in that: by excitation around It is passed through positive exciting current in group, realizes and increases magnetic;It is passed through negative exciting current, realizes weak magnetic.
CN201810913928.7A 2018-08-13 2018-08-13 Stator partition type alternate pole hybrid excitation motor Active CN108964396B (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111082625A (en) * 2020-01-09 2020-04-28 东华大学 Alternating magnetic pole brushless hybrid excitation synchronous motor
CN111509938A (en) * 2020-03-24 2020-08-07 江苏大学 Multi-working-mode double-stator magnetic field modulation motor

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101213719A (en) * 2005-07-01 2008-07-02 西门子公司 Synchronous machine
CN106385153A (en) * 2016-09-28 2017-02-08 华中科技大学 Hybrid excitation Motor
CN107070150A (en) * 2016-09-14 2017-08-18 华中科技大学 A kind of concentratred winding direct current biasing type hybrid excitation permanent magnet motor
CN107222075A (en) * 2017-07-24 2017-09-29 江苏大学 A kind of bimorph transducer mixed excitation electric machine with T-shaped inner stator unshakable in one's determination

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101213719A (en) * 2005-07-01 2008-07-02 西门子公司 Synchronous machine
CN107070150A (en) * 2016-09-14 2017-08-18 华中科技大学 A kind of concentratred winding direct current biasing type hybrid excitation permanent magnet motor
CN106385153A (en) * 2016-09-28 2017-02-08 华中科技大学 Hybrid excitation Motor
CN107222075A (en) * 2017-07-24 2017-09-29 江苏大学 A kind of bimorph transducer mixed excitation electric machine with T-shaped inner stator unshakable in one's determination

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111082625A (en) * 2020-01-09 2020-04-28 东华大学 Alternating magnetic pole brushless hybrid excitation synchronous motor
CN111509938A (en) * 2020-03-24 2020-08-07 江苏大学 Multi-working-mode double-stator magnetic field modulation motor

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