CN103312104B - Dual-rotor flux-switching permanent-magnet motor - Google Patents

Dual-rotor flux-switching permanent-magnet motor Download PDF

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Publication number
CN103312104B
CN103312104B CN201310252069.9A CN201310252069A CN103312104B CN 103312104 B CN103312104 B CN 103312104B CN 201310252069 A CN201310252069 A CN 201310252069A CN 103312104 B CN103312104 B CN 103312104B
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CN
China
Prior art keywords
stator
rotor
permanent magnet
tooth
flux
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CN201310252069.9A
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Chinese (zh)
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CN103312104A (en
Inventor
黄旭珍
周波
陈琦
魏佳丹
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南京航空航天大学
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Publication of CN103312104A publication Critical patent/CN103312104A/en
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Abstract

The invention provides a dual-rotor flux-switching permanent-magnet motor and belongs to the technical field of electric motors. The dual-rotor flux-switching permanent-magnet motor comprises a stator, an inner rotor and an outer rotor, wherein the stator is formed by connecting a plurality of stator modules, each stator module is composed of a stator iron core tooth (1), a permanent magnet (2) and an armature winding (3), the inner rotor (4) and the outer rotor (5) are located on the inner circle and the outer circle of the stator respectively, and independent air gaps are formed between the inner and outer rotors and the stator respectively. With the change of relative positions of the stator and the rotors, paths of flux emitted by the permanent magnets are switched continuously, and when the flux of a winding linkage is maximum, the paths of the flux are emitted by the permanent magnets and closed by the inner and outer air gaps, the inner and outer rotors and the stator iron core teeth. According to the motor, the defects that traditional flux-switching permanent-magnet motors are serious in flux leakage of outer circles of stators and low in utilization ratio of permanent magnets are overcome, and the torque and the power density of the motor can be improved.

Description

Birotor flux switch permanent magnet motor
Technical field
The invention belongs to machine field, be related specifically to a kind of birotor flux switch permanent magnet motor.
Background technology
The permanent magnet of flux switch permanent magnet motor and armature winding are all positioned on stator, cool while being easy to realize winding and permanent magnet, on rotor both without permanent magnet also without winding, rotor structure is simple, sturdy and durable, is suitable for high-speed cruising, and the magnetic linkage of every phase winding linkage is bipolarity change, the back electromotive-force constant of motor higher than monopolar electrode, therefore the torque density of flux switch permanent magnet motor and power density higher, be with a wide range of applications in the field such as wind power generation, electric motor car.But existing flux switch permanent magnet motor, there is stator cylindrical leakage field serious (as shown in Figure 1, wherein 1-leakage flux), permanent magnet consumption is large, the shortcoming that utilance is low.
Summary of the invention
The present invention is serious for solving existing flux switch permanent magnet motor leakage field, and the problem that permanent magnet utilance is low, proposes a kind of birotor flux switch permanent magnet motor.
Concrete technical scheme of the present invention is as follows:
A kind of birotor flux switch permanent magnet motor, comprise stators and rotators, described rotor is divided into inside and outside two rotors, and wherein stator is formed by connecting by several stator modules, and each stator modules is made up of stator core tooth, permanent magnet and armature winding; Internal rotor and external rotor lay respectively at inner circle and the cylindrical of stator, respectively and form independently air gap between stator.
The cylindrical of internal rotor is band toothing, and the inner circle of external rotor is band toothing, and the quantity of two rotor tooths is equal, and the tooth of internal rotor is relative with the groove of external rotor, and the groove of internal rotor is relative with the tooth of external rotor, forms the tooth mutual dislocation arrangement of inner and outer rotors.
The groove at the winding place of birotor flux switch permanent magnet motor is the groove structure towards two air gaps, can arrange cage modle syndeton at stator end, connects in aggregates by each stator modules.Each stator modules is connected as one by crossbeam each other.
The two ends of internal rotor and external rotor are respectively provided with two bearings, and two rotors are connected as one by bindiny mechanism, and during machine operation, the angular velocity of rotation of two rotors is identical with direction of rotation.
For improving the intensity of stator, make processing technology simple, each stator modules can set up beam structure each other, and two stator core tooth on link slot both sides, make groove be divided into two-layer up and down, be convenient to the coiling of winding, and strengthen stator intensity.
the course of work of the present invention is as follows:
Along with the rotation of inner and outer rotors, when the tooth of internal rotor, the groove of external rotor are with when in stator modules, the stator core tooth on the permanent magnet left side is relative, the magnetic flux that the permanent magnet that on adjacent two stator modules, magnetizing direction is contrary sends, tooth under the tooth of inner and outer rotors and yoke, two stator modules and permanent magnet, and two air gaps form closed-loop paths, and and winding linkage between two primary module in groove.
When the tooth of internal rotor, the groove of external rotor are relative with stator permanent magnet, the magnetic flux that this permanent magnet sends, a part forms closed-loop path along the stator core tooth of circular direction in stator through permanent magnet both sides, interior air gap, rotor tooth corresponding thereto.Another part is along the outer circular direction of stator, and two teeth on the stator core tooth through permanent magnet both sides, outer air gap, external rotor groove both sides corresponding thereto and middle yoke, form closed-loop path.Now, permanent magnet send magnetic flux substantially not with winding linkage, winding magnetic linkage is minimum.
When the tooth of internal rotor, the groove of external rotor are relative with the core tooth on the right of permanent magnet in stator modules, the magnetic flux that the permanent magnet that on adjacent two stator modules, magnetizing direction is contrary sends, tooth in the tooth of inner and outer rotors and yoke, two stator modules and permanent magnet, and two air gaps form closed-loop paths, and and winding linkage between two primary module in groove.To compare in the tooth of internal rotor and the groove of external rotor and this stator modules permanent magnet left side core tooth to pair time, magnetic flux path is identical, but flux-reversal.
When the groove of internal rotor, the tooth of external rotor are relative with stator permanent magnet, the magnetic flux that permanent magnet sends, tooth and the yoke of the stator core of a part through permanent magnet both sides, air gap and internal rotor form closed-loop path, the tooth of the stator core of another part through permanent magnet both sides, air gap and external rotor forms closed-loop path, and now winding magnetic linkage is minimum.
the present invention compared to existing technology tool has the following advantages:
The magnetic circuit of this motor stator and inner and outer rotors follows minimum reluctance principle.Along with the change of rotor relative position, the magnetic flux that permanent magnet sends, constantly switch its path, when inner and outer rotors often turns over a pole, can there is twice mechanical periodicity in armature winding linkage magnetic linkage.
When the magnetic flux of winding linkage is maximum, its path is sent by adjacent three pieces of permanent magnets, and close through inside and outside air gap, inner and outer rotors, stator core tooth, the utilance of permanent magnet is improved.Meanwhile, this motor overcomes traditional single rotor flux switch permanent magnet motor stator cylindrical yoke portion's leakage field serious problems (as shown in Figure 1), and the utilance of permanent magnet improves further, is conducive to the torque and the power density that improve motor.
And there is not yoke portion structure in stator, eliminates the permanent magnet in yoke portion, decreases the consumption of permanent magnet.While this motor adds external rotor, also reduce the volume mass of stator, therefore motor volume quality increases also few, but the Driving Torque of motor and power density can be made to significantly improve.
Accompanying drawing explanation
Fig. 1 is traditional flux switch permanent magnet motor.
Fig. 2 is the birotor flux switch permanent magnet motor axial section described in embodiment one.
Fig. 3 is magnetic flux switching principle key diagram.
3a) the tooth 1 of internal rotor and stator core tooth 1 relative case.
Situation when 3b) tooth 1 of internal rotor is relative with stator permanent magnet 1.
Situation when 3c) tooth 1 of internal rotor is relative with stator core tooth 2.
Situation when 3c) groove 1 of internal rotor is relative with permanent magnet 3.
Fig. 4 is the birotor flux switch permanent magnet motor axial section described in embodiment two.
In figure: 1-1 stator core tooth; 1-2 stator core tooth; 2-armature winding; 3-permanent magnet; 4-internal rotor; 4-1 tooth; 5-external rotor; 5-1 groove; 6-groove; Air gap in 7-; The outer air gap of 8-; 9-crossbeam.
Embodiment
Embodiment one: composition graphs 2 and Fig. 3 illustrate birotor flux switch permanent magnet motor of the present invention, comprise stator and two rotors, and internal rotor 4 is identical with direction of rotation with the rotating speed of external rotor 5.
Stator is made up of several stator modules, surrounds a circumference.Each stator modules is by two stator core tooth 1-1,1-2, and armature winding 2 and permanent magnet 3 form.In the middle of the stator core tooth 1-1 that permanent magnet 3 is positioned at two pieces of magnetic conductions and 1-2, form two iron cores and permanent magnet sandwich mold block structure.Two pieces of permanent magnets in adjacent sandwich have contrary magnetizing direction.Being groove 6 between two stator modules, is armature winding 2 in groove 6.Armature winding adopts concentratred winding frame mode according to the phase sequence of A-B-C, is wound in the interlayer module of permanent magnet and both sides stator core tooth composition.The positive winding of a phase winding and the negative winding of another phase winding is provided with in groove 6.Stator do not have the core construction in yoke portion.Cage modle syndeton can be set at stator end, by welding or bolted mode, each stator core tooth and permanent magnet be connected in aggregates.
Internal rotor 4 and external rotor 5 lay respectively at inner circle and the cylindrical of stator, form air gap 7 and air gap 8 respectively with stator.The cylindrical of internal rotor 4 is band toothing, and the inner circle of external rotor 5 is band toothing, and the quantity of two rotor tooths is equal, and the tooth 4-1 of internal rotor is relative with the groove of external rotor 5-1, the teeth groove opposed configuration that the formation tooth of internal rotor and the tooth of external rotor stagger mutually.The two ends of internal rotor and external rotor are respectively provided with two bearings, and two rotors are connected as one by bindiny mechanism, and during machine operation, the angular velocity of rotation of two rotors is identical with direction of rotation.
As Fig. 3 a) shown in, along with the rotation of inner and outer rotors, when the tooth 4-1 of internal rotor, the groove 5-1 of external rotor are relative with the stator core tooth 1-1 on permanent magnet in stator modules 3 left side, the magnetic flux that the permanent magnet that on adjacent two stator modules, magnetizing direction is contrary sends, tooth under the tooth of inner and outer rotors and yoke, two stator modules and permanent magnet, and interior air gap 7 and outer air gap 8 form closed-loop path, and and winding 2 linkage between two primary module in groove 6.Now, winding 2 linkage magnetic flux is maximum.
As Fig. 3 b) shown in, when the groove 5-1 of the tooth 4-1 of internal rotor 4, external rotor is relative with stator permanent magnet 3, the magnetic flux that this permanent magnet 3 sends, a part forms closed-loop path along the stator core tooth 1-1 of circular direction in stator through permanent magnet both sides and 1-2, interior air gap 7, rotor tooth 4-1 corresponding thereto.Another part is along the outer circular direction of stator, and two teeth on the stator core tooth 1-1 through permanent magnet both sides and 1-2, outer air gap 8, external rotor groove 5-1 both sides corresponding thereto and middle yoke, form closed-loop path.Now, permanent magnet send magnetic flux substantially not with winding linkage, the magnetic linkage of winding linkage is minimum.
As Fig. 3 c) shown in, when the tooth 4-1 of internal rotor 4, the groove 5-1 of external rotor are relative with the stator tooth 1-2 on the right of permanent magnet in stator modules 3, the magnetic flux that the permanent magnet that on adjacent two stator modules, magnetizing direction is contrary sends, tooth under the tooth of inner and outer rotors and yoke, two stator modules and permanent magnet, and interior air gap 7 and outer air gap 8 form closed-loop path, and and winding 2 linkage between two primary module in groove 6.Now, the magnetic flux of winding 2 linkage has maximum equally.Compare to the tooth 4-1 of internal rotor with the groove 5-1 of external rotor with when permanent magnet left side stator core tooth 1-1 is relative in this stator modules, magnetic flux path is substantially identical, but winding 2 linkage magnetic linkage direction is reverse.
As Fig. 3 d) shown in, when the tooth 5-2 of the groove 4-2 of internal rotor, external rotor is relative with permanent magnet 3, the magnetic flux that permanent magnet 3 sends, the tooth of the stator core tooth 1-1 of a part through permanent magnet both sides and 1-2, air gap 7 and internal rotor and yoke form closed-loop path, the stator core tooth 1-1 of another part through permanent magnet both sides and the tooth formation closed-loop path of 1-2, outer air gap 8 and external rotor, now the magnetic linkage of winding 2 linkage is minimum.
The work of minimum reluctance principle followed by this motor, and when internal rotor 4 and external rotor 5 often turn over a pole, the magnetic linkage size of armature winding 2 linkage can occur two from being up to minimum mechanical periodicity.The magnetic flux that permanent magnet sends, through two air gaps 7 and 8 and winding linkage, overcomes the leakage field serious problems (see figure 1) of traditional flux switch permanent magnet motor stator yoke.And there is not yoke portion structure in stator, eliminates the permanent magnet in yoke portion, decreases the consumption of permanent magnet.Although this motor adds external rotor 5, owing to also reducing the volume mass of stator, therefore motor volume quality increases also few, but the Driving Torque of motor and power density can be made to significantly improve.
Embodiment two: present embodiment is described see Fig. 4, the difference of the birotor flux switch permanent magnet motor of the present embodiment and embodiment one is on stator, due to the sandwich mold block structure that stator is made up of discrete stator core tooth and permanent magnet, and winding composition in groove, be not easy to the winding of winding, it is fixing that stator modules needs external support structure part to install.Therefore, in groove, install the non-magnetic crossbeam 9 that one connects two stator modules, crossbeam adopts intensity good not magnetic conduction or weak magnetic conductive metal material, and welds together with stator core tooth.Groove is split into two-layer up and down, all includes the positive winding of a phase winding and the negative winding of another phase winding in every layer, and two-layer same phase winding can adopt series connection or parallel up and down.

Claims (4)

1. birotor flux switch permanent magnet motor, comprise stators and rotators, it is characterized in that: described rotor is divided into inside and outside two rotors, and wherein stator is formed by connecting by several stator modules, each stator modules is made up of stator core tooth (1), permanent magnet (2) and armature winding (3); Internal rotor (4) and external rotor (5) lay respectively at inner circle and the cylindrical of stator, respectively and form independently air gap between stator; The cylindrical of internal rotor (4) is band toothing, the inner circle of external rotor (5) is band toothing, the quantity of two rotor tooths is equal, and the tooth (4-1) of internal rotor (4) is relative with the groove (5-1) of external rotor, the groove of internal rotor (4) is relative with the tooth of external rotor, forms the tooth mutual dislocation arrangement of inner and outer rotors.
2. birotor flux switch permanent magnet motor according to claim 1, is characterized in that: stator slot is groove structure, arranges cagelike structure at stator end, connects in aggregates by each stator modules.
3. birotor flux switch permanent magnet motor according to claim 1, is characterized in that: each stator modules is connected as one by crossbeam (9) each other.
4. birotor flux switch permanent magnet motor according to claim 1, is characterized in that: internal rotor (4) is identical with direction of rotation with the angular velocity of rotation of external rotor (5).
CN201310252069.9A 2013-06-24 2013-06-24 Dual-rotor flux-switching permanent-magnet motor CN103312104B (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104506011B (en) * 2014-12-18 2017-05-03 江苏大学 Flux switching permanent magnet motor suitable for extended range electric vehicle
CN105281514B (en) * 2015-11-09 2018-01-16 江苏大学 A kind of parallel connection type mixing magnetic Material cladding rotor flux switch motor
CN105356699B (en) * 2015-11-09 2018-04-24 江苏大学 A kind of automobile-used birotor flux switch motor

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JP3671929B2 (en) * 2002-04-01 2005-07-13 日産自動車株式会社 Rotating electric machine
US7839049B2 (en) * 2007-11-29 2010-11-23 General Electric Company Stator and stator tooth modules for electrical machines
CN201188558Y (en) * 2008-05-13 2009-01-28 东南大学 Magnetic flux switch electric machine suitable for high speed operation
JP5446213B2 (en) * 2008-11-04 2014-03-19 株式会社豊田中央研究所 Power transmission device
CN101964571B (en) * 2010-10-27 2012-11-28 南京航空航天大学 Inner and outer double-rotor hybrid excitation doubly salient pole machine
CN201985636U (en) * 2011-03-08 2011-09-21 大连名阳实业有限公司 Modularized magnetic flux switching permanent magnet motor
CN102832771B (en) * 2012-08-03 2015-02-18 东南大学 Combined-type flux switching permanent magnet motor

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