CN105245078A - Switching reluctance motor - Google Patents
Switching reluctance motor Download PDFInfo
- Publication number
- CN105245078A CN105245078A CN201410247397.4A CN201410247397A CN105245078A CN 105245078 A CN105245078 A CN 105245078A CN 201410247397 A CN201410247397 A CN 201410247397A CN 105245078 A CN105245078 A CN 105245078A
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- rotor
- stator
- described rotor
- switched reluctance
- reluctance machines
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Abstract
The invention provides a switching reluctance motor, which comprises a rotator assembly and a stator core (30), wherein the rotor assembly is provided with a rotor fixing member (10) and a plurality of rotor cores (20) which are fixedly arranged on the rotor fixing member (10) and distributed at intervals long the circumferential direction, and the rotor fixing member (10) is a nonmagnetic conductive member and has a rotating shaft fixing portion (11); the stator core (30) is arranged on the rotor assembly in a sleeved manner, the stator core (30) is provided with a stator yoke portion (31) and a plurality of stator tooth portions (32) located at the inner side of the stator yoke portion (31); and the rotor core (20); each rotor core (20) is provided with a rotor body (21) and a rotor installation portion (23), the rotor body (21) is fixed on the rotor fixing member (10) through the rotor installation portion (23), and an air gap is formed between adjacent two rotor bodies (21). The switching reluctance motor provided by the invention is higher in efficiency.
Description
Technical field
The present invention relates to technical field of motors, in particular to a kind of switched reluctance machines.
Background technology
At present, switched reluctance machines is a kind of novel buncher, governing system has direct current concurrently, exchanges the advantage of two class governing systems, and its structure simple rigid, speed-regulating range width, speed adjusting performance are excellent and in whole speed adjustable range, have greater efficiency and system reliability advantages of higher is widely used in the fields such as household electrical appliance, Aeronautics and Astronautics, electronics, machinery and motor vehicle.Application number be 200910263110.6 and the open text of patent of 201010102546.X all disclose a kind of name and be called that composite excitation partitioned formula is fixed, rotor switched reluctance motor, be that the open text of 200910263110.6 patents is as immediate prior art using application number, although it has good performance, but inevitably, there is between adjacent two rotor cores barrier (part for fixed mount), reduce the magnetic induction in magnetic field, in addition, when motor high frequency operates, the magnetic field of alternation is had in rotor core, therefore very strong axial eddy is produced, its shortcoming is, because fan-shaped block rotor embeds not in magnetic conduction rotor metallic sheath completely, magnetic conduction rotor metallic sheath is unfixing with the contact of segmental rotor tooth block, the axial eddy produced can become increase square doubly by not magnetic conduction rotor metallic sheath, axial eddy loss is larger on the impact of motor iron loss, along with the increasing of axial eddy loss, motor iron loss increases large, electric efficiency is caused to reduce, that is, in identical output situation, loss increases, input power needs to increase.
Summary of the invention
The present invention aims to provide one and has more high efficiency switched reluctance machines.
To achieve these goals, the invention provides a kind of switched reluctance machines, comprise: rotor assembly, have rotor fixture and be fixedly installed on multiple rotor cores on rotor fixture and spaced apart in the circumferential, rotor fixture is non-magnetic and has rotating shaft fixed part; Stator core, be set on rotor assembly, stator core has stator yoke and is positioned at multiple stator teeths of inner side of stator yoke, rotor core has rotor body and rotor installation portion, rotor body is fixed on rotor fixture by rotor installation portion, forms air gap between adjacent two rotor bodies.
Further, rotor installation portion is provided with axially extending bore.
Further, two relative in the circumferential side surfaces of adjacent two rotor cores are the plane be parallel to each other.
Further, rotor fixture have with multiple rotor installation portion one to one multiple rotor holding corresponding rotor installation portion hold groove, the part of rotor installation portion embeds corresponding rotor and holds in groove.
Further, rotor body has the rotor installed surface towards rotor fixture, and rotor installation portion protrudes from rotor installed surface, has radial clearance between rotor installed surface and rotor fixture.
Further, rotor body has the rotor cambered surface towards stator core, stator teeth have towards rotor assembly and the stator cambered surface suitable with rotor cambered surface.
Further, stator teeth comprises stator pole shoes.
Further, the minimum range between adjacent two rotor cores is less than the minimum range between adjacent two stator teeths.
Further, side surfaces has two axial edge be parallel to each other diametrically, stator teeth has two stator side mutually deviated from the circumferential, and the minimum range between two stator side of stator teeth is greater than the distance between be parallel to each other two axial edge of side surfaces.
Further, rotor installation portion is trapezoidal on cross section perpendicular to axial direction.
Apply technical scheme of the present invention, because multiple rotor core is spaced apart in the circumferential, and form air gap between adjacent two rotor bodies, therefore, magnetic field between adjacent two rotor bodies can not be subject to external substance interference (barriers such as between adjacent two rotor bodies), the magnetic line of force between adjacent two rotor bodies is more intensive, and the magnetic induction in the magnetic field that switched reluctance machines of the present invention is formed is more obvious.Therefore, switched reluctance machines of the present invention has higher efficiency.
Accompanying drawing explanation
The Figure of description forming a application's part is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 shows the schematic front view of the embodiment according to switched reluctance machines of the present invention;
Fig. 2 shows the enlarged diagram of switched reluctance machines at D place of Fig. 1;
Fig. 3 shows the contrast phasor of the iron loss of the switched reluctance machines of Fig. 1 and the switched reluctance machines of immediate prior art;
Fig. 4 a shows the magnetic circuit schematic diagram of switched reluctance machines 0 degree time of Fig. 1;
Fig. 4 b shows the magnetic circuit schematic diagram of switched reluctance machines 15 degree time of Fig. 1;
Fig. 4 c shows the magnetic circuit schematic diagram of switched reluctance machines 30 degree time of Fig. 1;
Fig. 4 d shows the magnetic circuit schematic diagram of switched reluctance machines 45 degree time of Fig. 1.
Wherein, the Reference numeral in above-mentioned figure is as follows:
10, rotor fixture; 11, rotating shaft fixed part; 12, spaced planes; 20, rotor core; 21, rotor body; 22, rotor installed surface; 23, rotor installation portion; 24, axially extending bore; 25, side surfaces; 26, rotor cambered surface; 30, stator core; 31, stator yoke; 32, stator teeth; 33, stator cambered surface; 34, stator pole shoes; 35, stator side.
Embodiment
It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.Below with reference to the accompanying drawings and describe the present invention in detail in conjunction with the embodiments.
As shown in Figure 1, the switched reluctance machines of the present embodiment comprises rotor assembly and stator core 30.Rotor assembly has rotor fixture 10 and is fixedly installed on multiple rotor cores 20 on rotor fixture 10 and spaced apart in the circumferential, and rotor fixture 10 is non-magnetic and has rotating shaft fixed part 11.Stator core 30 is set on rotor assembly, and that is, rotor assembly is located in the inside of stator core 30 rotationally.Stator core 30 has stator yoke 31 and is positioned at multiple stator teeths 32 of inner side of stator yoke 31, rotor core 20 has rotor body 21 and rotor installation portion 23, rotor body 21 is fixed on rotor fixture 10 by rotor installation portion 23, rotor body 21 is between the rotor installation portion 23 and stator core 30 of correspondence, air gap is formed between adjacent two rotor bodies 21, that is, between adjacent two rotor bodies 21, not there is any barrier.Certainly, the switched reluctance machines of the present embodiment also comprises winding (not shown), and winding adopts distribution volume structure, when energising runs be often only solely, ON operation in turn, certainly, also can adopt the structure of other routines.Rotating shaft fixed part 11 is preferably rotating shaft and wears through hole.
The switched reluctance machines of application the present embodiment, because multiple rotor core 20 is spaced apart in the circumferential, and form air gap between adjacent two rotor bodies 21, therefore, magnetic field between adjacent two rotor bodies 21 can not be subject to external substance interference (barriers such as between adjacent two rotor bodies 21), the magnetic line of force between adjacent two rotor bodies 21 is more intensive, and the magnetic induction in the magnetic field that the switched reluctance machines of the present embodiment is formed is more obvious.As the above analysis, the switched reluctance machines of the present embodiment has higher efficiency.In addition, rotor core 20 adopts fraction block structure, can reduce the use amount of material, cost-saving.
As shown in Figure 1, in the present embodiment, rotor body 21 has the rotor installed surface 22 towards rotor fixture 10, and rotor installation portion 23 protrudes from rotor installed surface 22, has radial clearance between rotor installed surface 22 and rotor fixture 10.Because rotor installed surface 22 and rotor fixture 10 have radial clearance, that is, rotor body 21 and rotor fixture 10 have radial clearance, and rotor body 21 can reduce the eddy current loss in rotor core 20 with the non-contact design of rotor fixture 10.In order to set forth above-mentioned technique effect further, as shown in Figure 3, the switched reluctance machines of the present embodiment with the immediate prior art described in background technology when other parameters are identical, in order to have identical power stage, the input power required for immediate prior art that the input power required for the switched reluctance machines of the present embodiment describes in background technology.As the above analysis, the switched reluctance machines of the present embodiment has higher efficiency.
As shown in Figure 1, in the present embodiment, rotor installation portion 23 is provided with axially extending bore 24.The setting position of axially extending bore 24 is near the bottom of rotor core 20, and this axially extending bore 24 plays the effect every magnetic, reduces the eddy current loss that rotor core 20 leakage field causes further.In the present embodiment, each rotor core 20 is provided with two axially extending bores 24, when reducing eddy current loss as far as possible, ensure that the intensity of rotor installation portion 23.
As shown in Figure 1, in the present embodiment, the plane of two side surfaces 25 for being parallel to each other relative in the circumferential of adjacent two rotor cores 20.Adopt said structure to be conducive to reducing minimum inductance, increase salient pole ratio, and reduce the torque pulsation caused because local is full simultaneously.
As shown in Figure 1, in the present embodiment, rotor fixture 10 have with multiple rotor installation portion 23 one to one multiple rotor holding corresponding rotor installation portion 23 hold groove (not marking in figure), the part of rotor installation portion 23 embeds corresponding rotor and holds in groove.Because rotor installation portion 23 adopts Embedded mounting means, not only the convenient rotor that is pressed into by rotor installation portion 23 to hold in groove and to form interference fit, and what rotor installation portion 23 can be made to coordinate with rotor fixture 10 is more firm, improve the stability during switched reluctance machines work of the present embodiment.
As shown in Figure 1, in the present embodiment, rotor installed surface 22 is plane, rotor fixture 10 is provided with rotor installed surface 22 towards correspondence and the spaced planes 12 arranged with this rotor installed surface 22 parallel interval.Spaced planes 12 and rotor installed surface 22 interval arrange the eddy current loss that can reduce further in rotor core 20.Certainly, as feasible execution mode, rotor installed surface 22 can be cambered surface or other nonplanar structures.Distance between spaced planes 12 and rotor installed surface 22 is α, α > 0.2mm.
As shown in Figure 1, in the present embodiment, rotor body 21 has the rotor cambered surface 26 towards stator core 30, stator teeth 32 have towards rotor assembly and the stator cambered surface 33 suitable with rotor cambered surface 26.The rotor body 21 adopting said structure is sector structure, and when rotor assembly is when rotating, rotor body 21 has less minimizing windage, reduces the windmill loss in rotor assembly high-speed rotation.
As shown in Figure 1, in the present embodiment, stator teeth 32 comprises stator pole shoes 34.Arranging stator pole shoes 34 can lifting motor copper factor, and then lifting motor efficiency.Because multiple rotor core 20 is arranged at interval in the circumferential, therefore, when minimum inductance position, be by adjacent rotor core 20 between air gap as every magnetic channel, and then the salient pole ratio that stator pole shoes 34 can't reduce motor is set, can not reduce electric efficiency, when guaranteed performance does not reduce, manufacturability is improved.If rely on the beeline between stator teeth and rotor to carry out every magnetic, beeline will be caused to decline once increase pole shoe, and then salient pole is than declining.
As shown in Figure 2, in the present embodiment, the minimum range (distances namely between two side surfaces 25) between adjacent two rotor cores 20 is G
r, the minimum range (distances namely between two stator pole shoes 34) between adjacent two stator teeths 32 is G
s, wherein, G
rbe less than G
s.Said structure is adopted to be conducive to reducing leakage field.The surface towards stator core 30 of rotor core 20 is the first circumferential cambered surface of the axis rotation of rotor assembly, the surface towards rotor assembly of stator teeth 32 be the second week that rotates of the axis of rotor assembly to cambered surface, second week is θ to the difference of the radius of the radius of cambered surface and the first circumferential cambered surface
2θ<G
s－G
r<8θ。
As shown in Figure 2, in the present embodiment, side surfaces 25 has two axial edge (not marking in figure) be parallel to each other diametrically, stator teeth 32 have in the circumferential be parallel to each other and two stator side, 35, two stator side 35 mutually deviated between stator yoke 31 and corresponding stator pole shoes 34.Distance between two stator side 35 of stator teeth 32 is Wt, and the distance between be parallel to each other two axial edge of side surfaces 25 is Wr, and wherein, Wt is greater than Wr.Unduly saturated in iron core while that said structure can guaranteeing that reduction leakage field is also, in the present embodiment, W
r=k*W
t, and k=0.6 ~ 0.9.If two stator side 35 are not parallel, so Wt is the minimum range between two stator side 35.
As shown in Figure 1, in the present embodiment, rotor installation portion 23 is trapezoidal on cross section perpendicular to axial direction.What adopt trapezoid cross section that rotor installation portion 23 can be made to coordinate with rotor body 21 is more firm, improves the stability during switched reluctance machines work of the present embodiment.As feasible execution mode, rotor installation portion 23 is triangular in shape or oval on cross section perpendicular to axial direction.
As shown in Figure 1, in the present embodiment, for reducing torque pulsation, and ensure two-way startup, its rotor core 20 should meet with the polar arc relation of stator core 30:
Wherein, N
rfor the rotor number of teeth, N
sfor the stator number of teeth, β
rfor the circumferential arc length (namely rotor pole arc) of rotor cambered surface 26, β
sfor the circumferential arc length (namely stator polar arc) of stator cambered surface 33; δ be greater than 0 positive number, preferred δ=2 ° ~ 6 °.
The switched reluctance machines of the present embodiment is three-phase 12 groove 8 pole, certainly, also adopts the switched reluctance machines of three-phase 24 groove 16 pole, four phase 8 groove 6 poles, four phase 16 groove 12 poles, four phase 24 groove 18 poles, five phase 10 groove 8 poles, five phase 20 groove 16 poles.
In the present embodiment, rotor fixture 10 can adopt the non-magnet_conductible materials such as stainless steel, cast aluminium and highstrenghtpiston's injection moulding, and rotor fixture 10 is preferably rotor fixed block.The stacking material that stator core 30 and rotor core 20 are as silicon steel sheet or non-crystalline material is overrided to form.
In addition, the tangential magnetic pull component with the switched reluctance machines of said structure increases, and under identical output, motor noise obviously reduces.The permeable section of rotor assembly is few, and the magnetic circuit of stator core 30 is short, effectively reduces iron loss, and electric efficiency promotes.
The specific works principle of the switched reluctance machines of the present embodiment is as follows:
As shown in fig. 4 a: A is conducted, A phase magnetic circuit is closed by the gap between stator yoke, stator teeth, the gap between spaced planes and rotor installed surface, adjacent two rotor cores, and due to longer through air magnetic circuit, air gap flux density is low; Rotor core starts to rotate to 15 degree under magnetic pull effect;
As shown in Figure 4 b: A is conducted, A phase magnetic circuit is closed by the forward position of stator yoke, stator teeth, gap between spaced planes and rotor installed surface, rotor core, because process major part is magnetic conduction substance, the close increase of magnetic, magnetic pull increases, but interpolar local is saturated can't make the close unlimited increase of magnetic, and rotor core rotates to 30 degree.
As illustrated in fig. 4 c: A is conducted, A phase magnetic circuit is closed by the mid portion of stator yoke, stator teeth, gap between spaced planes and rotor installed surface, rotor core, magnetic conductive area increases, the close further increase of magnetic, magnetic pull increases, along with the alignment gradually of position, magnetic pull starts to reduce, A starts to turn off, B phase starts conducting, B phase magnetic circuit is closed by the gap between stator yoke, stator teeth, the gap between spaced planes and rotor installed surface, adjacent two rotor cores, and rotor core rotates to 45 degree.
As shown in figure 4d: B is conducted, B phase magnetic circuit is undertaken closing by the forward position of stator yoke, stator teeth, gap between spaced planes and rotor installed surface, rotor core, repeats A phase process, and rotor continues to rotate.Wherein, the dotted line in Fig. 4 a to Fig. 4 d is magnetic circuit, and dotted line quantity more multilist shows that magnetic field is stronger.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a switched reluctance machines, comprising:
Rotor assembly, have rotor fixture (10) and be fixedly installed on described rotor fixture (10) multiple rotor cores (20) upper and spaced apart in the circumferential, described rotor fixture (10) is for non-magnetic and have rotating shaft fixed part (11);
Stator core (30), is set on described rotor assembly, and described stator core (30) has stator yoke (31) and is positioned at multiple stator teeths (32) of inner side of described stator yoke (31),
It is characterized in that, described rotor core (20) has rotor body (21) and rotor installation portion (23), described rotor body (21) is fixed on described rotor fixture (10) by described rotor installation portion (23), forms air gap between adjacent two described rotor bodies (21).
2. switched reluctance machines according to claim 1, is characterized in that, described rotor installation portion (23) is provided with axially extending bore (24).
3. switched reluctance machines according to claim 1, is characterized in that, the plane of two side surfaces (25) for being parallel to each other relative in the circumferential of adjacent two described rotor cores (20).
4. switched reluctance machines according to claim 1, it is characterized in that, described rotor fixture (10) have with multiple described rotor installation portion (23) one to one multiple rotor holding corresponding described rotor installation portion (23) hold groove, the part of described rotor installation portion (23) embeds corresponding described rotor and holds in groove.
5. switched reluctance machines according to claim 1, it is characterized in that, described rotor body (21) has the rotor installed surface (22) towards described rotor fixture (10), described rotor installation portion (23) protrudes from described rotor installed surface (22), has radial clearance between described rotor installed surface (22) and described rotor fixture (10).
6. switched reluctance machines according to claim 1, it is characterized in that, described rotor body (21) has the rotor cambered surface (26) towards described stator core (30), described stator teeth (32) have towards described rotor assembly and the stator cambered surface (33) suitable with described rotor cambered surface (26).
7. switched reluctance machines according to claim 1, is characterized in that, described stator teeth (32) comprises stator pole shoes (34).
8. switched reluctance machines according to claim 1, is characterized in that, the minimum range (G between adjacent two described rotor cores (20)
r) be less than minimum range (G between adjacent two described stator teeths (32)
s).
9. switched reluctance machines according to claim 3, it is characterized in that, described side surfaces (25) has two axial edge be parallel to each other diametrically, described stator teeth (32) has two stator side (35) of mutually deviating from the circumferential, and the minimum range (Wt) between two stator side (35) of described stator teeth (32) is greater than the distance (Wr) between be parallel to each other two axial edge of described side surfaces (25).
10. switched reluctance machines according to claim 1, is characterized in that, described rotor installation portion (23) is trapezoidal on cross section perpendicular to axial direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410247397.4A CN105245078B (en) | 2014-06-05 | 2014-06-05 | Switched reluctance machines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410247397.4A CN105245078B (en) | 2014-06-05 | 2014-06-05 | Switched reluctance machines |
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| Publication Number | Publication Date |
|---|---|
| CN105245078A true CN105245078A (en) | 2016-01-13 |
| CN105245078B CN105245078B (en) | 2018-02-13 |
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ID=55042607
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410247397.4A Active CN105245078B (en) | 2014-06-05 | 2014-06-05 | Switched reluctance machines |
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|---|---|
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1359660A2 (en) * | 2002-04-30 | 2003-11-05 | Switched Reluctance Drives Limited | Switched reluctance motor |
| CN202586528U (en) * | 2011-12-19 | 2012-12-05 | 周智庆 | Novel built-in stator permanent magnet variable reluctance motor and stator assembly structure thereof |
| CN103107669A (en) * | 2013-03-13 | 2013-05-15 | 张家政 | Energy-saving switch reluctance machine with modularized salient poles of stator and rotor |
| CN203872024U (en) * | 2014-06-05 | 2014-10-08 | 珠海格力节能环保制冷技术研究中心有限公司 | Switched reluctance motor |
-
2014
- 2014-06-05 CN CN201410247397.4A patent/CN105245078B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1359660A2 (en) * | 2002-04-30 | 2003-11-05 | Switched Reluctance Drives Limited | Switched reluctance motor |
| CN1455492A (en) * | 2002-04-30 | 2003-11-12 | 开关磁阻驱动有限公司 | Switch resistance drive device control |
| CN202586528U (en) * | 2011-12-19 | 2012-12-05 | 周智庆 | Novel built-in stator permanent magnet variable reluctance motor and stator assembly structure thereof |
| CN103107669A (en) * | 2013-03-13 | 2013-05-15 | 张家政 | Energy-saving switch reluctance machine with modularized salient poles of stator and rotor |
| CN203872024U (en) * | 2014-06-05 | 2014-10-08 | 珠海格力节能环保制冷技术研究中心有限公司 | Switched reluctance motor |
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|---|---|
| CN105245078B (en) | 2018-02-13 |
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Effective date of registration: 20181120 Address after: No. six, Qianshan Jinji West Road, Zhuhai, Guangdong Province Co-patentee after: Zhuhai Gree Energy Saving & Refrigerating Technology Resarch Center Co., Ltd. Patentee after: GREE ELECTRIC APPLIANCES Inc. OF ZHUHAI Address before: 519070 science and technology building, 789 Jinji Road, Qianshan, Zhuhai, Guangdong Patentee before: Zhuhai Gree Energy Saving & Refrigerating Technology Resarch Center Co., Ltd. |
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