CN103986255A - Switched reluctance motor and rotor thereof - Google Patents
Switched reluctance motor and rotor thereof Download PDFInfo
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- CN103986255A CN103986255A CN201310049704.3A CN201310049704A CN103986255A CN 103986255 A CN103986255 A CN 103986255A CN 201310049704 A CN201310049704 A CN 201310049704A CN 103986255 A CN103986255 A CN 103986255A
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- rotor
- switched reluctance
- reluctance machines
- salient pole
- baffling device
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Abstract
The present invention relates to a rotor of a switched reluctance motor, the rotor comprising: a rotor body; and a plurality of rotor salient poles projecting radially outward from the rotor body; wherein a blocking device is provided between ends of at least two rotor salient poles. The invention also relates to a switched reluctance motor comprising the rotor and the stator. The rotor of the switched reluctance motor and the switched reluctance motor comprising the rotor reduce the wind mill loss caused by the rotation of the rotor and reduce the noise caused by the disturbance of the airflow.
Description
Technical field
The present invention relates to a kind of switched reluctance machines, relate more specifically to the rotor of switched reluctance machines.
Background technology
Traditional permagnetic synchronous motor normally adopts the rotor that magnet is installed, and produces demagnetization but magnet used is affected by temperature, electric current etc. easily, can cause loss of excitation, thereby cause the inefficacy of permagnetic synchronous motor when serious.In addition, permanent magnet is expensive, particularly rare-earth permanent magnet, and therefore above-mentioned reason has limited its range of application.
Switched reluctance machines (Switched Reluctance Motor, SRM) owing to thering is simplicity of design, sound construction, without adopting magnet, cost is low, efficiency is high, starting torque is large, control the advantage such as flexible and simple and extensively or start to be applied to the every field such as industry, aircraft industry and family expenses.
Switched reluctance machines generally include a stator and one supported can be with respect to the rotor of stator rotation.Between rotor and stator, there is very little gap.Because stator and rotor all have protruding salient pole, this form is also referred to as double-salient-pole structure, is wound with coil in stator salient poles, i.e. stator winding, for the rotation of motor provides excitation, does not have coil on rotor.Switched reluctance machines utilizes magnetic resistance change rate to produce driving torque work.Attempt to rotate to while making the maximized position of stator winding inductance that the magnetic resistance of magnetic circuit minimizes and be energized when rotor, reluctance motor will produce torque.Due to the rotor with salient pole structure of switched reluctance machines, can produce air-flow stirring by the groove between rotor with salient pole, windmill loss increases and has reduced electric efficiency thus, and can cause that noise increases, particularly particularly outstanding in refrigerant compressor field.
Summary of the invention
The present invention aims to provide a kind of novel rotor, is used in particular for switched reluctance machines.
According to an aspect of the present invention, provide a kind of rotor of switched reluctance machines, having comprised: rotor body; And from the radially outwardly multiple rotor with salient pole of described rotor body; Wherein, between the end of at least two rotor with salient pole, be provided with baffling device.
The invention still further relates to a kind of switched reluctance machines, comprising: stator; And rotor as above, described rotor can be installed rotatably with respect to described stator.
Brief description of the drawings
By the description referring to accompanying drawing, it is easier to understand that the feature and advantage of one or several execution mode of the present invention will become, wherein:
Fig. 1 is the schematic diagram of rotor structure of the prior art;
Fig. 2 a-2c is the schematic diagram that rotor with salient pole amplification in diverse location with respect to stator salient poles of the switched reluctance machines in Fig. 1 is shown;
Fig. 3 is according to the schematic diagram of the first execution mode of the rotor of switched reluctance machines of the present invention;
Fig. 4 is according to the schematic diagram of the second execution mode of the rotor of switched reluctance machines of the present invention;
Fig. 5 is the partial enlarged drawing of the end construction of the second execution mode rotor salient pole shown in Fig. 4;
Fig. 6 is according to the schematic diagram of the rotor structure of switched reluctance machines of the present invention.
Embodiment
Be only exemplary to the description of embodiment below, and be never the restriction to the present invention and application thereof.
Be briefly described the rotor of switched reluctance machines 10 and the structure of stator and operation principle referring to Fig. 1.In switched reluctance machines 10, the rotor 40 with the multiple rotor with salient pole 44 radially outwardly from rotor body 42 is arranged on to be had from stator base portion 22 radially in the central cavity of the stator 20 of projecting inward multiple stator salient poles 24.Described rotor 40 center has the hole 50 for motor shaft, for use in output torque.The periphery of each stator salient poles 24 is wound with stator winding 26, in the periphery of each rotor with salient pole 44, there is no winding.Between the end of rotor with salient pole 44 and the relative end of stator salient poles 24, there is very little gap, make thus rotor 40 in the inner chamber of stator 20, freely to rotate.Stator base portion 22 and stator salient poles 24 and rotor body 42 and rotor with salient pole 44 are all made by the good material of magnetic property.When stator winding 26 around being wound on each stator salient poles 24 is supplied with electric current by the sequential according to certain, will produce the magnetic field that drives rotor 40 to rotate.
The operation principle of switched reluctance machines 10 as above is that magnetic flux is always along the path closure of magnetic permeability maximum.According to above-mentioned principle, for the right rotor with salient pole 44 of the every composition in the rotor 40 of switched reluctance machines 10, by supplying with electric current to the winding 26 in front and the paired stator salient poles 24 nearest with it that is positioned at paired rotor with salient pole 44 for rotor 40 direction of rotation A, make winding 26 produce magnetic field.Such as, as shown in Figure 1, for paired rotor with salient pole 44-1 and 44-2, give respectively along the winding 26-1 and the 26-2 supply electric current that are positioned at for direction of rotation A on corresponding paired stator salient poles 24-1 and the 24-2 in its front, after winding making current, produce magnetic flux, the magnetic line of force forms closed path through nearest rotor with salient pole 44-1, rotor body 42, rotor with salient pole 44-2.Because magnetic flux tends to along the propagated of magnetic permeability maximum, therefore, rotor with salient pole 44-1 and 44-2 under the effect of magnetic force respectively towards with the nearer position motion of stator salient poles 24-1 and 24-2 distance, thereby form the larger closed path of magnetic permeability, make thus rotor 40 along direction of rotation A rotation, through position as shown in Figure 2 b.In the time that rotor with salient pole 44-1 and 44-2 radially aim at (as shown in Figure 2 c) with stator salient poles 24-1 and 24-2 respectively, magnetic circuit is the shortest.In order to make rotor 40 continue motion, make winding 26-1 and 26-2 on stator salient poles 24-1 and 24-2 cut off electric current, and make to be positioned at along direction of rotation A winding 26 making current of another group in stator salient poles at stator salient poles 24-1 and 24-2 rear, thus for rotor 40 provides the electromagnetic force that makes its rotation continuously.Be controlled in a certain order the electric current on-state of the winding 26 in right stator salient poles 24 by corresponding switch element, thereby make it continue the magnetic field of rotation for rotor 40 provides.
As mentioned above, the rotor 40 of switched reluctance machines moves along direction of rotation continuously, the double-salient-pole structure of stator and rotor increases windmill loss, thereby reduce the runnability of motor, and the air-flow stirring existing due to the groove 46 between rotor with salient pole 44 can cause the problem that noise increases in the time that rotor 40 rotates.
According to design of the present invention, wish by preventing that at the groove 46 that provides baffling device 60 to come between enclosed rotor salient pole 44 between rotor with salient pole 44 air-flow from entering groove 46, thereby reduce windmill loss, reduce noise.
With reference to Fig. 3, according to the first execution mode of the present invention, between the adjacent rotor with salient pole 44 of described rotor 40, baffling device 60 is set.Described baffling device 60 is for being connected to the obstruct bridge between the adjacent end portion of adjacent rotor salient pole 44, with the neighboring that forms described rotor 40 together with the neighboring of rotor with salient pole 40.Baffling device 60 is parts of rotor with salient pole 44, from the outermost end 45 of rotor with salient pole 44 along circumferentially extending to the groove 46 between described adjacent rotor with salient pole 44 is closed to form cavity towards the outermost end 45 of adjacent rotor with salient pole 44.
In the execution mode shown in Fig. 3, the groove 46 between all adjacent rotor with salient pole 44 is all blocked device 60 and seals, and is integrally formed with rotor with salient pole 44.But, being understandable that, some grooves 46 in the groove 46 that all adjacent rotor with salient pole 44 limit can be closed, and baffling device 60 is set between the end of at least two rotor with salient pole 44.In this case, in above-mentioned at least two rotor with salient pole 44 that are provided with baffling device 60, between adjacent rotor with salient pole 44 by described baffling device 60 some or all of seal, to form cavity.Will also be appreciated that the groove 46 that adjacent rotor with salient pole 44 limits can be partly closed.Preferred mode is that all grooves 46 are blocked device 46 and seal, and groove 46 is sealed completely.
Baffling device 60 is arranged on the radially outermost end place of described rotor with salient pole 44.Thus, together with the neighboring of the neighboring of described baffling device 60 and described rotor with salient pole 44, form the outer surface of the continuous smooth transition of described rotor 40.As shown in Figure 3, described outer surface is periphery.
As shown in Figure 3, the diameter D1 of the described rotor 40 edge limited diameter of a circle of described rotor with salient pole 44 outermost end of substantially serving as reasons.The diameter D2 of described baffling device 60 diameter of a circle that described baffling device 60 outermost peripheries limit of substantially serving as reasons.Described baffling device 60 is parts that described rotor with salient pole 44 outermost end edges extend out, so D2 equals D1 substantially.
Fig. 4 illustrates the second execution mode of the present invention, and different with the first execution mode of Fig. 3 is the shape of the described baffling device 60 between described rotor with salient pole 44 ends.Particularly, described baffling device 60 radially inwardly concaving along described rotor 40, described baffling device 60 is the arc of indent substantially, and the diameter D2 of described baffling device 60 is that D2 is less than the diameter D1 of described rotor along the distance between the concave point of radially relative two arcs of described rotor 40 substantially.
As shown in Figure 4, described baffling device 60 is positioned near the outermost end of described rotor with salient pole 44, i.e. radially slightly inside position.
Referring to the enlarged drawing of the local A of the Fig. 4 shown in Fig. 5, in the second execution mode, the direction of rotation of relatively described rotor 40, described rotor with salient pole 44 has leading section 47 and rearward end 48, in described leading section 47 and rearward end 48, one of be at least formed as curved profile, preferably, rearward end 48 is formed as curved profile.The circular arc design of leading section 47 and rearward end 48 has reduced the torque pulsation of described motor.In the time that described leading section 47 and described rearward end 48 all have this curved profile design, they can be of similar shape and curvature, also can have different shapes and curvature.For example the circular arc of leading section 47 has less radius of curvature R 3, and the circular arc of rearward end 48 has larger radius of curvature R 4.This design as far as possible little torque that the affects in the situation that of torque ripple reduction is exported.
R3 and R4 are usually located in the scope of 0.2mm-20mm, can carry out suitable selection according to the size of described rotor 40 and described rotor with salient pole 44.Preferably, R3 and R4 are positioned at the scope of 0.2mm-6mm.
In addition, the distance in the radial direction at described rotor between the center of curvature O of leading section 47 and the center of curvature P of rearward end 48 is E, is 0-20mm apart from E, preferably, is 0-5mm apart from E.
Although the baffling device 60 in the second execution mode shown in the first execution mode shown in Fig. 3 and Fig. 4 is substantial arc, be understandable that, described baffling device 60 can be straight line, eccentric arc or other suitable shape.
Although the baffling device 60 in the second execution mode shown in the first execution mode shown in Fig. 3 and Fig. 4 is positioned near the outermost end place or outermost end of described rotor with salient pole 44, be understandable that, described baffling device 60 also can be positioned at other any applicable position.For example, the two ends of described baffling device 60 can all be positioned at the outer end place of described rotor with salient pole 44, or one end of described baffling device 60 (preferably corresponding to that one end of the leading section 47) is positioned at the outermost end of described rotor with salient pole 44, and the other end is positioned at the radially inner position of outermost end of relatively described rotor with salient pole 44.
In the execution mode shown in Fig. 3 and Fig. 4, described baffling device 60 has a width W in the radial direction described rotor 40, and described width W is positioned at the scope of 0.01mm-4mm.Preferably, described width W is positioned at the scope of 0.3mm-0.8mm.The width W of described baffling device 60 is as much as possible little, thus the performance of described motor is caused to little impact as far as possible.
The present invention can also by optimizing the height of described rotor with salient pole 44 or the thickness of rotor yoke, to guarantee that magnetic resistance difference (being the difference of maximum induction and minimum inductance) between described rotor with salient pole 44 and groove 46 meets motor output torque unaffected.
As shown in Fig. 3-5, described baffling device 60 is integrally formed with described rotor with salient pole 44.For example be integrated by punch forming or powder metallurgical technique straight forming.Understandable, described baffling device 60 can separate formation with described rotor with salient pole 44, is fixed together in any suitable manner.
In switched reluctance machines of the present invention, described rotor 40 can be to be made up of various technique known to those of skill in the art.Exemplify but be not limited to described rotor 40 and form by multiple silicon steel sheets are stacking, or described rotor 40 is made up by powder metallurgical technique of soft magnetic material.
As shown in Figure 6, rotor end plates 70 and 80 is arranged on respectively the axial two ends of described rotor 40, utilize rivet 90 through described rotor end plates 70 and 80 and described rotor 40 on location hole be installed together, thus described rotor end plates 70 and 80 and baffling device 60 together with seal the groove 46 between described rotor with salient pole 44.
Can be known by description above, by between the rotor with salient pole end at rotor, baffling device being set, reduce windmill loss, reduce noise.By some improved execution modes, reduce the pulsation of output torque, improve the efficiency of motor.
Below to making recapitulative explanation according to the rotor of switched reluctance machines of the present invention and corresponding switched reluctance machines thereof.
According to one embodiment of the present invention, at least two rotor with salient pole that are provided with baffling device, between adjacent rotor with salient pole by described baffling device some or all of seal, to form cavity.
According to one embodiment of the present invention, between the end of part or all adjacent rotor with salient pole, be provided with baffling device.
Described baffling device is the obstruct bridge being connected between the end of described rotor with salient pole.
The outermost end of the contiguous corresponding described rotor with salient pole at least one end of described baffling device.
Selectable, described baffling device is linear or arc.
Selectable, described baffling device is the camber line radially inwardly concaving.
The direction of rotation of relatively described rotor, described at least one rotor with salient pole leading section and rearward end in be one of at least circular arc or eccentric arc.
The radius of curvature R 3 of the leading section of described rotor with salient pole is less than or equal to the radius of curvature R 4 of rearward end.
Selectable, R3 and R4 are between 0.2mm-20mm.Preferably, R3 and R4 are between 0.2mm-6mm.
In addition, the distance E along in described rotor radial direction between the center of curvature O of the leading section of described rotor with salient pole and the center of curvature P of rearward end is 0-20mm.Preferably, described is 0-5mm apart from E.
Described baffling device has width W along the radial direction of described rotor, and described width W is 0.01mm-4mm, and preferably, described width W is 0.3mm-0.8mm.
Preferably, described baffling device and described rotor are integrally formed.
Described baffling device forms the outer surface of the continuous smooth transition of described rotor together with rotor with salient pole.Preferably, the outer surface of described continuous smooth transition is the face of cylinder.
Described rotor also comprises the rotor end plates that is positioned at described rotor axial end, thereby and together with described baffling device, seals the groove between described rotor with salient pole.
Although described various execution mode of the present invention in detail at this, but should be appreciated that the present invention is not limited to the embodiment of describing in detail and illustrating here, in the situation that not departing from the spirit and scope of the invention, can be realized by those skilled in the art other modification and variant.All these modification and variant all fall within the scope of the present invention.And all members described here can be replaced by the member being equal in other technologies.
Claims (20)
1. the rotor of a switched reluctance machines (40), comprising:
Rotor body (42); And
From the radially outwardly multiple rotor with salient pole (44) of described rotor body (42);
Wherein, between the end of at least two rotor with salient pole (44), be provided with baffling device (60).
2. the rotor of switched reluctance machines as claimed in claim 1 (40), wherein in above-mentioned at least two rotor with salient pole (44) that are provided with baffling device (60), between adjacent rotor with salient pole (44) by described baffling device (60) some or all of seal, to form cavity.
3. the rotor of switched reluctance machines as claimed in claim 1 (40) is wherein provided with baffling device (60) between the end of part or all adjacent rotor with salient pole (44).
4. the rotor (40) of the switched reluctance machines as described in as arbitrary in claim 1-3, wherein said baffling device (60) is for being connected to the obstruct bridge between the end of described rotor with salient pole (44).
5. the rotor (40) of the switched reluctance machines as described in as arbitrary in claim 1-3, the outermost end of the contiguous corresponding described rotor with salient pole at least one end (44) of wherein said baffling device (60).
6. the rotor (40) of the switched reluctance machines as described in as arbitrary in claim 1-3, wherein said baffling device (60) is linear or arc.
7. the rotor (40) of the switched reluctance machines as described in as arbitrary in claim 1-3, the arc of wherein said baffling device (60) for radially inwardly concaving.
8. the rotor of switched reluctance machines as claimed in claim 7 (40), the wherein direction of rotation of relatively described rotor (40), in the leading section (47) of rotor with salient pole described at least one (44) and rearward end (48) is one of at least circular arc or eccentric arc.
9. the rotor of switched reluctance machines as claimed in claim 8 (40), the radius of curvature R 3 of the leading section (47) of wherein said rotor with salient pole (44) is less than or equal to the radius of curvature R 4 of rearward end (48).
10. the rotor of switched reluctance machines as claimed in claim 9 (40), wherein R3 and R4 are between 0.2mm-20mm.
The rotor (40) of 11. switched reluctance machines as claimed in claim 10, wherein R3 and R4 are between 0.2mm-6mm.
The rotor (40) of 12. switched reluctance machines as claimed in claim 9, the distance E along in described rotor radial direction between the center of curvature O of the leading section (47) of wherein said rotor with salient pole (44) and the center of curvature P of rearward end (48) is 0-20mm.
The rotor (40) of 13. switched reluctance machines as claimed in claim 12, wherein said is 0-5mm apart from E.
The rotor (40) of 14. switched reluctance machines as described in as arbitrary in claim 1-3, wherein said baffling device (60) has width W along the radial direction of described rotor, and described width W is 0.01mm-4mm.
The rotor (40) of 15. switched reluctance machines as claimed in claim 14, wherein said width W is 0.3mm-0.8mm.
The rotor (40) of 16. switched reluctance machines as described in as arbitrary in claim 1-3, wherein said baffling device (60) is integrally formed with described rotor (40).
The rotor (40) of 17. switched reluctance machines as described in as arbitrary in claim 1-3, wherein said baffling device (60) forms the outer surface of the continuous smooth transition of described rotor (40) together with rotor with salient pole (44).
The rotor (40) of 18. switched reluctance machines as claimed in claim 17, the outer surface of wherein said continuous smooth transition is the face of cylinder.
The rotor (40) of 19. switched reluctance machines as described in as arbitrary in claim 1-3, wherein said rotor (40) also comprises the rotor end plates (70 that is positioned at described rotor (40) axial end portion, 80), thus and together with described baffling device (60), seal the groove between described rotor with salient pole (44).
20. 1 kinds of switched reluctance machines (10), comprising:
Stator (20); And
According to the rotor (40) of arbitrary described switched reluctance machines in claim 1-19, described rotor (40) can be installed rotatably with respect to described stator (20).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310049704.3A CN103986255A (en) | 2013-02-07 | 2013-02-07 | Switched reluctance motor and rotor thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310049704.3A CN103986255A (en) | 2013-02-07 | 2013-02-07 | Switched reluctance motor and rotor thereof |
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| Publication Number | Publication Date |
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| CN103986255A true CN103986255A (en) | 2014-08-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310049704.3A Pending CN103986255A (en) | 2013-02-07 | 2013-02-07 | Switched reluctance motor and rotor thereof |
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| CN (1) | CN103986255A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107579639A (en) * | 2017-10-23 | 2018-01-12 | 史立伟 | A kind of high temperature resistant permanent-magnet servo motor |
| CN107579641A (en) * | 2017-10-23 | 2018-01-12 | 史立伟 | A kind of automobile start generator |
| CN107834723A (en) * | 2017-11-28 | 2018-03-23 | 广州驰裕网络科技有限公司 | A kind of New-type electric machine |
| CN109713838A (en) * | 2019-03-15 | 2019-05-03 | 常州富兴机电有限公司 | Switched reluctance machines |
| CN110556990A (en) * | 2019-09-05 | 2019-12-10 | 哈尔滨理工大学 | Axial magnetic flux low vibration disk type switch reluctance motor |
| CN110784032A (en) * | 2018-07-31 | 2020-02-11 | 通用电气再生能源技术公司 | Rotor for a synchronous generator |
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| EP0625819A1 (en) * | 1993-05-19 | 1994-11-23 | Siemens Aktiengesellschaft | Reluctance motor, in particular for driving a washing machine |
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| US5604388A (en) * | 1994-02-16 | 1997-02-18 | Emerson Electric Co. | Switched reluctance rotor molded lug |
| JPH09201022A (en) * | 1996-01-23 | 1997-07-31 | Brother Ind Ltd | Variable reluctance motor |
| KR0149957B1 (en) * | 1995-05-29 | 1999-05-15 | 김광호 | Switched reluctance motor |
| CN101667757A (en) * | 2009-09-29 | 2010-03-10 | 河北工业大学 | Rotor structure of switched reluctance motor for reducing vibration and noise |
| CN203193416U (en) * | 2013-02-07 | 2013-09-11 | 艾默生环境优化技术(苏州)有限公司 | Switched reluctance motor and rotor thereof |
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- 2013-02-07 CN CN201310049704.3A patent/CN103986255A/en active Pending
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| JPH0522914A (en) * | 1991-07-11 | 1993-01-29 | Brother Ind Ltd | Variable reluctance motor |
| EP0625819A1 (en) * | 1993-05-19 | 1994-11-23 | Siemens Aktiengesellschaft | Reluctance motor, in particular for driving a washing machine |
| US5604388A (en) * | 1994-02-16 | 1997-02-18 | Emerson Electric Co. | Switched reluctance rotor molded lug |
| CN2245820Y (en) * | 1995-04-14 | 1997-01-22 | 满永奎 | Switch magnetic drag electric machine |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107579639A (en) * | 2017-10-23 | 2018-01-12 | 史立伟 | A kind of high temperature resistant permanent-magnet servo motor |
| CN107579641A (en) * | 2017-10-23 | 2018-01-12 | 史立伟 | A kind of automobile start generator |
| CN107579639B (en) * | 2017-10-23 | 2020-06-12 | 云南康迪科技有限公司 | High-temperature-resistant permanent magnet servo motor |
| CN107834723A (en) * | 2017-11-28 | 2018-03-23 | 广州驰裕网络科技有限公司 | A kind of New-type electric machine |
| CN110784032A (en) * | 2018-07-31 | 2020-02-11 | 通用电气再生能源技术公司 | Rotor for a synchronous generator |
| CN109713838A (en) * | 2019-03-15 | 2019-05-03 | 常州富兴机电有限公司 | Switched reluctance machines |
| CN109713838B (en) * | 2019-03-15 | 2024-02-13 | 常州富兴机电有限公司 | Switched reluctance motor |
| CN110556990A (en) * | 2019-09-05 | 2019-12-10 | 哈尔滨理工大学 | Axial magnetic flux low vibration disk type switch reluctance motor |
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