CN104811002A - High power density permanent magnet brushless double-feed electric motor in novel structure - Google Patents
High power density permanent magnet brushless double-feed electric motor in novel structure Download PDFInfo
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- CN104811002A CN104811002A CN201510204363.1A CN201510204363A CN104811002A CN 104811002 A CN104811002 A CN 104811002A CN 201510204363 A CN201510204363 A CN 201510204363A CN 104811002 A CN104811002 A CN 104811002A
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- stator
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- power density
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Abstract
The invention provides a high power density permanent magnet brushless double-feed electric motor in a novel structure. The motor comprises a first stator, a second stator and a rotor; the first stator and the second stator are arranged on two sides of the rotor; an external air gap is formed between the first stator and the rotor; an internal air gap is formed between the rotor and the second stator; the first stator and the second stator are connected through a stator support to be fixed; permanent magnets are arranged on the internal side and the external side of the rotor; the rotor is fixed on a rotary shaft; the first stator and the second stator are respectively provided with an armature winding. The high power density permanent magnet brushless double-feed electric motor in the novel structure can reduce manufacturing costs and improve the motor power density and efficiency.
Description
Technical field
The present invention relates to a kind of motor, particularly a kind of novel high-power density permanent magnetic brushless double-fed motor with bimorph transducer.
Background technology
Compared with traditional electrical excitation electromotor, it is simple that magneto has structure, reliable; Volume is little, and quality is light; Loss is few, and efficiency is high; The shape and size of motor versatile and flexiblely can wait remarkable advantage, are thus subject to the extensive concern of electric automobile industry.Double-stator permanent magnet brushless electric machine, compared with tradition list stator permanent magnet brushless electric machine, has higher torque density and power density.Therefore in high-power driving system, in order to improve the power density of motor, reduce costs, its motor can adopt double-stator structure.
Patent CN203352396U gives a kind of New-type electric machine with double-stator structure, and its rotor is cup-like structure, is arranged between the first stator and the second stator, the external stator of motor, rotor and internal stator concentric and separate.This motor equidistantly embeds permanent magnet equably respectively on the wall of cup of the second stators and rotators, and can realize motor by two permanent magnet actings in conjunction and suddenly stop racing, precision controlling is high.Due to rotor all embedding permanent magnet, and the first stator and the second stator there is winding, when motor runs, there is heat dissipation problem.
Patent CN104300755A gives the Dual-stator brushless double-fed motor of the heterogeneous symmetric winding of a kind of bilayer, and its rotor adopts the structure of double-deck heterogeneous symmetric winding, the external stator of motor, rotor and internal stator concentric and separate.This motor eliminates electric brush slip ring, improves the reliability of place system, reduces maintenance cost.Internal stator and rotor equivalent are a wound rotor by this motor, and only have the rotating magnetic field dual feeding synchronous that could realize expect synchronous with the rotating magnetic field that external stator winding is set up set up when rotor outer layer winding to run.But this motor requires higher to the rotating speed of motor and winding frequency, number of pole-pairs.
Summary of the invention
The object of the invention is that providing a kind of reduces manufacturing cost, improves the novel high-power density permanent magnetic brushless double-fed motor of the bimorph transducer of power of motor density and efficiency.
In order to solve above-mentioned technical problem, the invention provides a kind of high-power density permanent magnetic brushless double-fed motor of new structure, this motor comprises the first stator, the second stator, rotor; First stator, the second stator are positioned at the both sides of rotor, are provided with outer air gap between the first stator and rotor, are provided with interior air gap between rotor and the second stator, and the first stator, the second stator are connected and fixed by stator support frame; The interior outside of rotor is provided with permanent magnet, and rotor is fixed in rotating shaft; The first described stator and the second stator are separately installed with armature winding.
In a preferred embodiment: the first described stator and the cross section of the second stator are circulus.
In a preferred embodiment: described armature winding is same-phase winding.
In a preferred embodiment: the separate use of described armature winding or series connection use.
In a preferred embodiment: the cross section of described rotor is circulus, described permanent magnet forms the magnetic pole that circumferencial direction alternately changes on two end faces of this rotor.
In a preferred embodiment: the outside of described first stator and the inside of the second stator are respectively equipped with heat abstractor.
In a preferred embodiment: described rotor and permanent magnet are embed or built-in annexation.
In a preferred embodiment: bearings is passed through in one end of described rotating shaft.
Compared to prior art, technical scheme of the present invention possesses following beneficial effect:
Due to the armature winding non rotating of two stators of the high-power density permanent magnetic brushless double-fed motor of a kind of new structure provided by the invention, thus avoid and adopt brush and slip ring to carry out the problem of powering.
First stator exterior and second stator interior of the high-power density permanent magnetic brushless double-fed motor of this new structure can increase heat abstractor, so that motor radiating, solve the heat dissipation problem existed in patent of invention CN203352396U.
The rotor of the high-power density permanent magnetic brushless double-fed motor of this new structure has lower moment of inertia, and rotor is permeability magnetic material, motor adopts double-stator structure, and its air gap flux density, higher than conventional permanent magnet brushless doubly-fed motor, has higher power density and torque density.
Accompanying drawing explanation
Fig. 1 is described novel high-power density permanent magnetic brushless double-fed motor structural representation;
Fig. 2 is described novel high-power density permanent magnetic brushless double-fed motor rotor structural representation.；
Fig. 3 is winding magnetomotive force F
a1, F
a3be F with magnetomotive force
scompositive relation figure.
Embodiment
Hereafter the present invention will be further described with embodiment by reference to the accompanying drawings.
As shown in Figure 1-2, this is a kind of magneto with bimorph transducer to a kind of a kind of specific implementation of high-power density permanent magnetic brushless double-fed motor of new structure, and forming primarily of three parts, is the first stator 1, rotor 2, second stator 3 successively.After assembling is shaping, two stators 1,3 are positioned at outside, and rotor 2 is positioned at the inboard of two stators 1,3.Two stators are connected by stator support frame 12 and fix, and rotor 2 is fixed on armature spindle 23, is supported by bearing 24.
The rotor 2 of the novel high-power density permanent magnetic brushless double-fed motor that patent of the present invention proposes is circulus, adopts damascene structures that permanent magnet 21,22 is embedded outside in rotor, as shown in Figure 2.Also the structure that permanent magnet is built-in can be adopted in High Speed System.
First stator 1 of the high-power density permanent magnetic brushless double-fed motor of a kind of new structure that patent of the present invention proposes and the second stator 3 are all separately installed with armature winding 11,31.All rotating mmf F can be produced when the first stator and the energising of the second stator winding 11,31
a1, F
a3and set up armature field Φ
a1, Φ
a3, in two stator winding 11,31, produce armature reaction electric potential E respectively
a1, E
a31and E
a3, E
a13.Wherein, between two stators, the impact of armature reaction is very little, therefore, and E
a31and E
a13can ignore.Rotor permanent magnet magnetomotive force F
2and the excitation field Φ set up
2also in two stator winding, corresponding induced electromotive force E is produced
1, E
3.Because brushless, permanently doubly-fed motor two stator winding actings in conjunction of bimorph transducer are by generation superposition performance.As shown below, corresponding phase winding magnetomotive force F in double-stator permanent magnet brushless double-fed motor two stator winding
a1and F
a3space vector difference θ electrical degree, synthesis magnetomotive force is F
s.As can be seen from Figure 3, when θ=0, F
a1and F
a3have identical phase place, synthesis magnetomotive force is maximum, and motor will export maximum electromagnetic torque.Namely, when in the first stator 1 and the second stator 3, corresponding windings is same-phase, the electromagnetic torque obtained is maximum.
A kind of high-power density permanent magnetic brushless double-fed motor of new structure that the present embodiment proposes is the motor two stators and rotor being nested together a composition concentric type structure, this motor has two-layer air gap, magnetic flux in two-layer air gap shares the yoke portion magnetic circuit of rotor, and due to tangential component direction on rotor of two-layer air-gap field contrary, cancel out each other, the volume of this partial common magnetic circuit can be reduced, improve the utilance of magnetic field energy, improve power density and the torque density of motor.
First stator 1 of the high-power density permanent magnetic brushless double-fed motor of a kind of new structure that patent of the present invention proposes and the second stator 3 are all wound with independently armature winding, there is multiple winding connection.The double winding 11,31 of the first stator and the second stator can be composed in series a set of winding, also can run as double winding separately.Double winding is composed in series a set of winding can produce larger induced electromotive force, and motor can operate in the lower scope of rotating speed and export larger electromagnetic torque; When the first stator or the second stator winding are used alone, effective turns-in-series of its every phase winding is less, thus the induced electromotive force produced is less, and the electromagnetic torque that motor exports reduces, but can improve motor speed, widens range of motor speeds.Traditional single stator permanent magnet brushless electric machine weak magnetism speed expansion ability is poor, and the double-stator permanent magnet brushless dual-feed motor that patent of the present invention proposes can realize the object of expansion speed by the connected mode changing winding.
In drive system of electric automobile, owing to have employed bimorph transducer winding, when gross power is constant, voltage or the current limit of system power element can be reduced.And the multiple winding connection of double-stator permanent magnet brushless dual-feed motor can export multiple running status, meet the demand of the complicated operating condition of electric automobile.
Claims (8)
1. a high-power density permanent magnetic brushless double-fed motor for new structure, is characterized in that: this motor comprises the first stator (1), the second stator (3), rotor (2); First stator (1), the second stator (3) are positioned at the both sides of rotor (2), outer air gap is provided with between first stator (1) and rotor (2), be provided with interior air gap between rotor (2) and the second stator (3), the first stator (1), the second stator (3) are connected and fixed by stator support frame (12); The interior outside of rotor (2) is provided with permanent magnet (21,22), and rotor (2) is fixed in rotating shaft (23);
Described the first stator (1) and the second stator (3) are separately installed with armature winding (11,31).
2. the high-power density permanent magnetic brushless double-fed motor of a kind of new structure according to claim 1, is characterized in that: described the first stator (1) and the cross section of the second stator (3) are circulus.
3. the high-power density permanent magnetic brushless double-fed motor of a kind of new structure according to claim 1, is characterized in that: described armature winding (11,31) is same-phase winding.
4. the high-power density permanent magnetic brushless double-fed motor of a kind of new structure according to claim 1, is characterized in that: (11,31) the separate use of described armature winding or series connection use.
5. the high-power density permanent magnetic brushless double-fed motor of a kind of new structure according to claim 1, it is characterized in that: the cross section of described rotor (2) is circulus, described permanent magnet (21,22) forms the magnetic pole that circumferencial direction alternately changes on two end faces of this rotor (2).
6. the high-power density permanent magnetic brushless double-fed motor of a kind of new structure according to claim 1, is characterized in that: the outside of described first stator (1) and the inside of the second stator (3) are respectively equipped with heat abstractor.
7. the high-power density permanent magnetic brushless double-fed motor of a kind of new structure according to claim 1, is characterized in that: described permanent magnet (21,22) and rotor (2) are for embed or built-in annexation.
8. the high-power density permanent magnetic brushless double-fed motor of a kind of new structure according to claim 1, is characterized in that: one end of described rotating shaft (23) is supported by bearing (24).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510204363.1A CN104811002A (en) | 2015-04-27 | 2015-04-27 | High power density permanent magnet brushless double-feed electric motor in novel structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510204363.1A CN104811002A (en) | 2015-04-27 | 2015-04-27 | High power density permanent magnet brushless double-feed electric motor in novel structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104811002A true CN104811002A (en) | 2015-07-29 |
Family
ID=53695589
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510204363.1A Pending CN104811002A (en) | 2015-04-27 | 2015-04-27 | High power density permanent magnet brushless double-feed electric motor in novel structure |
Country Status (1)
| Country | Link |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105871140A (en) * | 2016-04-06 | 2016-08-17 | 哈尔滨理工大学 | Rotor dual-side permanent-magnet type single-winding dual-stator vernier motor |
| CN111566914A (en) * | 2018-01-16 | 2020-08-21 | Abb瑞士股份有限公司 | Method for controlling a synchronous double-stator machine |
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| JP2002369467A (en) * | 2001-06-01 | 2002-12-20 | Mitsubishi Electric Corp | Dynamo-electric machine and pulley drive device using the dynamo-electric machine |
| CN1808846A (en) * | 2005-12-27 | 2006-07-26 | 上海大学 | Dual-feeding mixed excitation axial magnetic field magento motor |
| CN102158027A (en) * | 2011-03-30 | 2011-08-17 | 上海中科深江电动车辆有限公司 | Dual-stator permanent-magnet synchronous power generation-electric motor |
| CN102545502A (en) * | 2012-01-19 | 2012-07-04 | 东南大学 | Dual-stator brushless double-fed motor |
| CN102948049A (en) * | 2010-06-23 | 2013-02-27 | 阿莫泰克有限公司 | Double-stator/double-rotor motor and direct actuator for washer using same |
| US20140028142A1 (en) * | 2012-07-30 | 2014-01-30 | Denso Corporation | Double-stator motor |
| CN103872869A (en) * | 2012-12-07 | 2014-06-18 | 株式会社电装 | Multi-gap type rotary electric machine |
-
2015
- 2015-04-27 CN CN201510204363.1A patent/CN104811002A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002369467A (en) * | 2001-06-01 | 2002-12-20 | Mitsubishi Electric Corp | Dynamo-electric machine and pulley drive device using the dynamo-electric machine |
| CN1808846A (en) * | 2005-12-27 | 2006-07-26 | 上海大学 | Dual-feeding mixed excitation axial magnetic field magento motor |
| CN102948049A (en) * | 2010-06-23 | 2013-02-27 | 阿莫泰克有限公司 | Double-stator/double-rotor motor and direct actuator for washer using same |
| CN102158027A (en) * | 2011-03-30 | 2011-08-17 | 上海中科深江电动车辆有限公司 | Dual-stator permanent-magnet synchronous power generation-electric motor |
| CN102545502A (en) * | 2012-01-19 | 2012-07-04 | 东南大学 | Dual-stator brushless double-fed motor |
| US20140028142A1 (en) * | 2012-07-30 | 2014-01-30 | Denso Corporation | Double-stator motor |
| CN103872869A (en) * | 2012-12-07 | 2014-06-18 | 株式会社电装 | Multi-gap type rotary electric machine |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105871140A (en) * | 2016-04-06 | 2016-08-17 | 哈尔滨理工大学 | Rotor dual-side permanent-magnet type single-winding dual-stator vernier motor |
| CN111566914A (en) * | 2018-01-16 | 2020-08-21 | Abb瑞士股份有限公司 | Method for controlling a synchronous double-stator machine |
| CN111566914B (en) * | 2018-01-16 | 2022-07-19 | Abb瑞士股份有限公司 | Method for controlling a synchronous double-stator machine |
| US11594944B2 (en) | 2018-01-16 | 2023-02-28 | Abb Schweiz Ag | Method for controlling a synchronous double stator electric machine |
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Application publication date: 20150729 |