CN103312104A - Dual-rotor flux-switching permanent-magnet motor - Google Patents
Dual-rotor flux-switching permanent-magnet motor Download PDFInfo
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- CN103312104A CN103312104A CN2013102520699A CN201310252069A CN103312104A CN 103312104 A CN103312104 A CN 103312104A CN 2013102520699 A CN2013102520699 A CN 2013102520699A CN 201310252069 A CN201310252069 A CN 201310252069A CN 103312104 A CN103312104 A CN 103312104A
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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
Technical field
The invention belongs to machine field, specially refer to a kind of birotor flux switch permanent magnet motor.
Background technology
The permanent magnet of flux switch permanent magnet motor and armature winding all are positioned on the stator, cooling when being easy to realize winding and permanent magnet, on the rotor both without permanent magnet also without winding, rotor structure is simple, and is sturdy and durable, is suitable for high-speed cruising, and the magnetic linkage of every phase winding linkage is the bipolarity variation, the back electromotive-force constant of motor is higher than the unipolarity electrode, so the torque density of flux switch permanent magnet motor and power density are higher, are with a wide range of applications in fields such as wind power generation, electric motor cars.But there is stator cylindrical leakage field serious (as shown in Figure 1, wherein 1-leakage flux) in existing flux switch permanent magnet motor, and the 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 the 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 comprises stator and rotor, and 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 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 the stator.
The cylindrical of internal rotor is the band toothing, and the inner circle of external rotor is the band toothing, and the quantity of two rotor tooths equates, 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 the cage modle syndeton be set at stator end, connects each stator modules in aggregates.Each stator modules connects as one by crossbeam each other.
The two ends of internal rotor and external rotor respectively are provided with two bearings, and two rotors connect 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 be set up beam structure each other, and two stator core tooth on link slot both sides are divided into groove two-layer up and down, are convenient to the coiling of winding, and strengthen stator intensity.
The course of work of the present invention is as follows:
Rotation along with inner and outer rotors, when the groove of the tooth of internal rotor, external rotor is relative with the stator core tooth on the permanent magnet left side in the stator modules, the magnetic flux that the opposite permanent magnet of magnetizing direction sends on adjacent two stator modules, tooth and permanent magnet under the tooth of inner and outer rotors and yoke, two stator modules, and two air gaps form closed-loop paths, and and two primary module between winding linkage in the groove.
When the groove of the tooth of internal rotor, external rotor is relative with stator permanent magnet, the magnetic flux that this permanent magnet sends, a part along circular direction in the stator through the stator core tooth on permanent magnet both sides, interior air gap, the rotor tooth formation closed-loop path relative with it.Another part is circular direction outside stator, and two teeth and middle yoke through the stator core tooth on permanent magnet both sides, outer air gap, external rotor groove both sides relative with it form the closed-loop path.At this moment, permanent magnet send magnetic flux substantially not with the winding linkage, the winding magnetic linkage is minimum.
When the groove of the tooth of internal rotor, external rotor is relative with the core tooth on permanent magnet the right in the stator modules, the magnetic flux that the opposite permanent magnet of magnetizing direction sends on adjacent two stator modules, tooth and permanent magnet in the tooth of inner and outer rotors and yoke, two stator modules, and two air gaps form closed-loop paths, and and two primary module between winding linkage in the groove.Compare in the groove of the tooth of internal rotor and external rotor and this stator modules permanent magnet left side core tooth to the time, magnetic flux path is identical, but flux-reversal.
When the tooth of the groove of internal rotor, external rotor is relative with stator permanent magnet, the magnetic flux that permanent magnet sends, a part forms the closed-loop path through stator core, air gap, the tooth that reaches internal rotor and the yoke on permanent magnet both sides, another part forms the closed-loop path through the tooth of stator core, air gap and the external rotor on permanent magnet both sides, and this moment, the winding magnetic linkage was minimum.
The present invention has following advantage compared to existing technology:
The magnetic circuit of this motor stator and inner and outer rotors is followed the minimum reluctance principle.Along with the variation of rotor relative position, the magnetic flux that permanent magnet sends constantly switches its path, and when inner and outer rotors whenever turned over a utmost point, twice cycle variation can occur armature winding linkage magnetic linkage.
When the magnetic flux of winding linkage was maximum, its path was for to be sent by three adjacent permanent magnets, and through inside and outside air gap, inner and outer rotors, stator core tooth closure, the utilance of permanent magnet is improved.Simultaneously, this motor has overcome traditional single rotor flux switch permanent magnet motor stator cylindrical yoke section's leakage field serious problems (as shown in Figure 1), and the utilance of permanent magnet further improves, and is conducive to improve torque and the power density of motor.
And there is not yoke section structure in stator, saved the permanent magnet of yoke section, reduced the consumption of permanent magnet.When this motor has increased external rotor, also reduced the volume mass of stator, so motor volume mass penalty and few, but output torque and the power density of motor are significantly improved.
Description of drawings
Fig. 1 is traditional flux switch permanent magnet motor.
Fig. 2 is embodiment one described birotor flux switch permanent magnet motor axial section.
Fig. 3 is magnetic flux switching principle key diagram.
3a) tooth 1 of internal rotor and stator core tooth 1 relative situation.
Situation when 3b) tooth 1 of internal rotor and stator permanent magnet 1 are relative.
Situation when 3c) tooth 1 of internal rotor and stator core tooth 2 are relative.
Situation when 3c) groove 1 of internal rotor and permanent magnet 3 are relative.
Fig. 4 is embodiment two described birotor flux switch permanent magnet motor axial sections.
Among the figure: the 1-1 stator core tooth; The 1-2 stator core tooth; 2-armature winding; The 3-permanent magnet; The 4-internal rotor; The 4-1 tooth; The 5-external rotor; The 5-1 groove; The 6-groove; Air gap in the 7-; The outer air gap of 8-; The 9-crossbeam.
Embodiment
Embodiment one: in conjunction with Fig. 2 and Fig. 3 birotor flux switch permanent magnet motor of the present invention is described, comprises stator and two rotors, and the rotating speed of internal rotor 4 and external rotor 5 is identical with direction of rotation.
Stator is made 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.Permanent magnet 3 is positioned in the middle of the stator core tooth 1-1 and 1-2 of two magnetic conductions, forms two iron cores and permanent magnet sandwich mold block structure.Two permanent magnets in the adjacent sandwich have opposite magnetizing direction.Being groove 6 between two stator modules, is armature winding 2 in the groove 6.Armature winding adopts concentrated winding construction mode according to the phase sequence of A-B-C, is wound on the interlayer module of permanent magnet and both sides stator core tooth composition.Be provided with the positive winding of a phase winding and the negative winding of another phase winding in the groove 6.The core construction that does not have yoke section on the stator.Can the cage modle syndeton be set at stator end, by welding or bolted mode, connect each stator core tooth and permanent magnet 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 with stator respectively.The cylindrical of internal rotor 4 is the band toothing, and the inner circle of external rotor 5 is the band toothing, and the quantity of two rotor tooths equates, and the tooth 4-1 of internal rotor is relative with the groove of external rotor 5-1, the relative structure of teeth groove that the tooth of formation internal rotor and the tooth of external rotor stagger mutually.The two ends of internal rotor and external rotor respectively are provided with two bearings, and two rotors connect 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, rotation along with inner and outer rotors, when the groove 5-1 of the tooth 4-1 of internal rotor, external rotor is relative with the stator core tooth 1-1 on permanent magnet 3 left sides in the stator modules, the magnetic flux that the opposite permanent magnet of magnetizing direction sends on adjacent two stator modules, tooth and permanent magnet under the tooth of inner and outer rotors and yoke, two stator modules, and interior air gap 7 and outer air gap 8 form closed-loop paths, and and two primary module between winding 2 linkages in the groove 6.At this moment, winding 2 linkage magnetic fluxs are maximum.
Such as Fig. 3 b) shown in, when the groove 5-1 of the tooth 4-1 of internal rotor 4, external rotor and stator permanent magnet 3 are relative, the magnetic flux that this permanent magnet 3 sends, a part along circular direction in the stator through the stator core tooth 1-1 on permanent magnet both sides and 1-2, interior air gap 7, the rotor tooth 4-1 formation closed-loop path relative with it.Another part is circular direction outside stator, and two teeth and middle yoke through the stator core tooth 1-1 on permanent magnet both sides and 1-2, outer air gap 8, external rotor groove 5-1 both sides relative with it form the closed-loop path.At this moment, permanent magnet send magnetic flux substantially not with the winding linkage, the magnetic linkage of winding linkage is minimum.
Such as Fig. 3 c) shown in, when the groove 5-1 of the tooth 4-1 of internal rotor 4, external rotor is relative with the stator tooth 1-2 on permanent magnet 3 the right in the stator modules, the magnetic flux that the opposite permanent magnet of magnetizing direction sends on adjacent two stator modules, tooth and permanent magnet under the tooth of inner and outer rotors and yoke, two stator modules, and interior air gap 7 and outer air gap 8 form closed-loop paths, and and two primary module between winding 2 linkages in the groove 6.At this moment, the magnetic flux of winding 2 linkages has maximum equally.Compare to the groove 5-1 of the tooth 4-1 of internal rotor and external rotor when relative with permanent magnet left side stator core tooth 1-1 in this stator modules, magnetic flux path is basic identical, but winding 2 linkage magnetic linkage directions are reverse.
Such as Fig. 3 d) shown in, when the tooth 5-2 of the groove 4-2 of internal rotor, external rotor and permanent magnet 3 are relative, the magnetic flux that permanent magnet 3 sends, a part forms the closed-loop path through stator core tooth 1-1 and 1-2, air gap 7, the tooth that reaches internal rotor and the yoke on permanent magnet both sides, another part forms the closed-loop path through the stator core tooth 1-1 on permanent magnet both sides and the tooth of 1-2, outer air gap 8 and external rotor, and this moment, the magnetic linkage of winding 2 linkages was minimum.
This motor is followed the work of minimum reluctance principle, and when internal rotor 4 and external rotor 5 whenever turned over a utmost point, the magnetic linkage of armature winding 2 linkages size can occur two from being up to minimum cycle variation.The magnetic flux that permanent magnet sends is through two air gaps 7 and 8 and the winding linkage, overcome the leakage field serious problems (see figure 1) of traditional flux switch permanent magnet motor stator yoke section.And there is not yoke section structure in stator, saved the permanent magnet of yoke section, reduced the consumption of permanent magnet.Although this motor has increased external rotor 5, owing to also reduced the volume mass of stator, so motor volume mass penalty and few, but output torque and the power density of motor are significantly improved.
Embodiment two: referring to Fig. 4 present embodiment is described, the difference of the birotor flux switch permanent magnet motor of the present embodiment and embodiment one is on stator, because the sandwich mold block structure that stator is comprised of discrete stator core tooth and permanent magnet, and winding forms in the groove, be not easy to the winding of winding, it is fixing that stator modules needs external support structure spare to install.Therefore, a non-magnetic crossbeam 9 that connects two stator modules is installed in groove, crossbeam adopts intensity preferably 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, two-layerly up and down can adopt series connection or the mode that is connected in parallel with phase winding.
Claims (5)
1. birotor flux switch permanent magnet motor, comprise stator and rotor, 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, and each stator modules is made 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 the stator.
2. birotor flux switch permanent magnet motor according to claim 1, it is characterized in that: the cylindrical of internal rotor (4) is the band toothing, the inner circle of external rotor (5) is the band toothing, the quantity of two rotor tooths equates, 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.
3. birotor flux switch permanent magnet motor according to claim 1 and 2 is characterized in that: at stator end cagelike structure is set, connects each stator modules in aggregates.
4. birotor flux switch permanent magnet motor according to claim 1 and 2, it is characterized in that: each stator modules connects as one by crossbeam (9) each other.
5. birotor flux switch permanent magnet motor according to claim 1, it is characterized in that: internal rotor (4) is identical with direction of rotation with the angular velocity of rotation of external rotor (5).
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| CN201310252069.9A CN103312104B (en) | 2013-06-24 | 2013-06-24 | Dual-rotor flux-switching permanent-magnet motor |
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| CN201310252069.9A CN103312104B (en) | 2013-06-24 | 2013-06-24 | Dual-rotor flux-switching permanent-magnet motor |
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| CN103312104B CN103312104B (en) | 2015-04-15 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104506011A (en) * | 2014-12-18 | 2015-04-08 | 江苏大学 | Flux switching permanent magnet motor suitable for extended range electric vehicle |
| CN105281514A (en) * | 2015-11-09 | 2016-01-27 | 江苏大学 | Parallel type mixing-magnetic-material-based composite-rotor-contained magnetic flux switching motor |
| CN105356699A (en) * | 2015-11-09 | 2016-02-24 | 江苏大学 | Dual-rotor flux-switching motor for vehicle |
| CN108270334A (en) * | 2018-02-11 | 2018-07-10 | 南京航空航天大学 | Non-overlapping winding sectional type birotor electro-magnetic flux switching motor |
| CN108429398A (en) * | 2018-05-18 | 2018-08-21 | 广东美的厨房电器制造有限公司 | External rotor electric machine and range hood |
| CN110504811A (en) * | 2019-09-12 | 2019-11-26 | 山东大学 | A kind of dislocation birotor Magneticflux-switching type magneto and generating equipment |
| CN111181340A (en) * | 2020-02-19 | 2020-05-19 | 山东大学 | Combined modular dual-rotor permanent magnet rotating linear motor and driving equipment |
| CN114938087A (en) * | 2022-06-06 | 2022-08-23 | 河北工业大学 | High-frequency transformer integrated double-module magnetic flux switching motor |
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Patent Citations (7)
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| JP2003299327A (en) * | 2002-04-01 | 2003-10-17 | Nissan Motor Co Ltd | Rotating electric machine |
| CN101447702A (en) * | 2007-11-29 | 2009-06-03 | 通用电气公司 | Stator and stator tooth modules for electrical machines |
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Cited By (13)
| 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 |
| CN104506011A (en) * | 2014-12-18 | 2015-04-08 | 江苏大学 | Flux switching permanent magnet motor suitable for extended range electric vehicle |
| CN105281514A (en) * | 2015-11-09 | 2016-01-27 | 江苏大学 | Parallel type mixing-magnetic-material-based composite-rotor-contained magnetic flux switching motor |
| CN105356699A (en) * | 2015-11-09 | 2016-02-24 | 江苏大学 | Dual-rotor flux-switching motor for vehicle |
| CN105356699B (en) * | 2015-11-09 | 2018-04-24 | 江苏大学 | A kind of automobile-used birotor flux switch motor |
| CN108270334B (en) * | 2018-02-11 | 2023-09-29 | 南京航空航天大学 | Non-overlapping winding block type double-rotor electro-magnetic flux switching motor |
| CN108270334A (en) * | 2018-02-11 | 2018-07-10 | 南京航空航天大学 | Non-overlapping winding sectional type birotor electro-magnetic flux switching motor |
| CN108429398A (en) * | 2018-05-18 | 2018-08-21 | 广东美的厨房电器制造有限公司 | External rotor electric machine and range hood |
| CN110504811A (en) * | 2019-09-12 | 2019-11-26 | 山东大学 | A kind of dislocation birotor Magneticflux-switching type magneto and generating equipment |
| CN111181340A (en) * | 2020-02-19 | 2020-05-19 | 山东大学 | Combined modular dual-rotor permanent magnet rotating linear motor and driving equipment |
| CN111181340B (en) * | 2020-02-19 | 2023-04-07 | 山东大学 | Combined modular dual-rotor permanent magnet rotating linear motor and driving equipment |
| CN114938087A (en) * | 2022-06-06 | 2022-08-23 | 河北工业大学 | High-frequency transformer integrated double-module magnetic flux switching motor |
| CN114938087B (en) * | 2022-06-06 | 2024-04-23 | 河北工业大学 | High-frequency transformer integrated two-module magnetic flux switching motor |
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