CN114448121B - Rotor lamination set for synchronous reluctance motor - Google Patents
Rotor lamination set for synchronous reluctance motor Download PDFInfo
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- CN114448121B CN114448121B CN202210356222.1A CN202210356222A CN114448121B CN 114448121 B CN114448121 B CN 114448121B CN 202210356222 A CN202210356222 A CN 202210356222A CN 114448121 B CN114448121 B CN 114448121B
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- synchronous reluctance
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- 238000003475 lamination Methods 0.000 title claims abstract description 53
- 230000001360 synchronised effect Effects 0.000 title claims abstract description 17
- 230000003139 buffering effect Effects 0.000 claims abstract description 18
- 239000000872 buffer Substances 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims abstract description 9
- 230000004907 flux Effects 0.000 claims description 10
- 230000007704 transition Effects 0.000 claims description 6
- 210000001503 joint Anatomy 0.000 claims description 2
- 230000008569 process Effects 0.000 abstract description 6
- 230000000903 blocking effect Effects 0.000 abstract description 4
- 239000000463 material Substances 0.000 description 6
- 238000001125 extrusion Methods 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 238000013459 approach Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000012141 concentrate Substances 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000012447 hatching Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The invention relates to the technical field of synchronous reluctance motors, in particular to a rotor lamination set for a synchronous reluctance motor, wherein a main body of a rotor lamination comprises four deformation buffering parts which correspond to half parts of a d axis one by one and are symmetrical relative to the half parts of the d axis, and the deformation buffering parts are hollow areas obtained by cutting, are arranged at the edges of through round holes and are communicated with the through round holes through opening ends; the edge profile of the deformation buffer portion includes: a first sidewall symmetric about the d-axis half; the two second side walls are symmetrically arranged on two sides of the first side wall, and the edges of the first side wall and the second side wall are butted; the other ends of the two second side walls form open ends which are gathered. The invention provides a rotor lamination set capable of effectively reducing deformation quantity after being installed with a shaft body, wherein deformation buffering parts are uniformly distributed around a through round hole to contain deformation, and a first-stage flow blocking part is used for preventing deformation, so that the deformation is closer to the vicinity of the shaft body, and instability can be reduced in the rotation process of the shaft body.
Description
Technical Field
The invention relates to the technical field of synchronous reluctance motors, in particular to a rotor lamination set for a synchronous reluctance motor.
Background
In the processing process of a rotor lamination of a synchronous reluctance motor, an arc-shaped strip-shaped magnetic flux guide part is obtained in a blanking mode to guide magnetic flux, so that high torque efficiency is caused; the presence of the punched-out part results in a non-magnetic hollow-out region, which then acts as a flow-impeding part.
Obtaining a lamination group after stacking the rotor laminations, wherein the lamination group comprises a magnetic blocking direction, namely a q-axis direction; and the preferential direction of passage of the magnetic, i.e. the d-axis direction; the d-axis is formed by the flux guide, which is formed by the laminations, continuously from the inner diameter to the outer diameter, while the q-axis is interrupted by the flow-blocking portion.
At the in-process that lamination stack and axis body are connected, the accessible makes lamination stack and axis body obtain the mode of different temperatures respectively, and under this kind of mode, the temperature rise back suitable expanded lamination stack establishes the axis body outside that the temperature is lower with littleer frictional force cover to after the temperature resumes to the normal atmospheric temperature, make the two realize connecting through great frictional force.
However, in this way, because the rotor laminations have different shapes on the d axis and the q axis, when the lamination stack and the shaft body are fixedly connected by mutual extrusion, deformation of different degrees is inevitably generated in two directions; especially, in the d axle direction, can take place great degree deformation from the internal diameter to the external diameter for the axis body and the pivoted in-process of lamination group can take place unstable condition because of above-mentioned deformation, and this kind of condition has restricted the promotion of rotational speed.
How to reduce the deformation amount of the laminated stack after the laminated stack and the shaft body are connected in the above manner, so as to improve the rotating speed limit of the shaft body, which becomes a problem to be solved by the technical personnel in the field. In view of the above problems, the present designer designs a rotor lamination set for a synchronous reluctance motor based on practical experience and professional knowledge that is abundant over years in engineering application of such products, and with the application of theory and active research and innovation.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
Disclosure of Invention
The invention provides a rotor lamination set for a synchronous reluctance motor, which can effectively solve the problems in the background art.
In order to achieve the purpose, the invention adopts the technical scheme that:
a rotor lamination stack for a synchronous reluctance machine comprising a plurality of rotor laminations arranged in a stack, the rotor laminations comprising a body having a periphery that is cylindrical, the body comprising:
the through round hole is arranged in the center of the main body, is used for the shaft body to penetrate through and is fixed with the shaft body through friction force;
the magnetic flux guiding parts are arranged between every two adjacent d-axis half parts from inside to outside in sequence, and a hollow choked flow part obtained by blanking is arranged between every two adjacent magnetic flux guiding parts;
the main body also comprises four deformation buffering parts which are in one-to-one correspondence with the half parts of the d axis and are symmetrical relative to the half parts of the d axis, and the deformation buffering parts are hollow areas obtained by cutting, are arranged at the edges of the through round holes and are communicated with the through round holes through opening ends;
the edge profile of the deformation buffer part comprises:
a first sidewall symmetric about the d-axis half;
the two second side walls are symmetrically arranged on two sides of the first side wall, and the edges of the first side wall and the second side wall are in butt joint;
the other ends of the two second side walls form the opening ends, and the opening ends are gathered.
Further, the second side wall is an arc-shaped surface and protrudes towards the outside of the deformation buffer part.
Further, the first side wall is an arc-shaped surface and protrudes towards the inside of the deformation buffer part.
Further, the parallel distance between the axis of the through round hole and the most protruding part of the first side wall is 1-1.2 times of the radius of the through round hole.
Furthermore, the first side wall is tangent to the cylindrical surface where the inner wall of the through round hole is located.
Further, the first side wall and the second side wall are smoothly connected through a transition side wall, and the transition side wall is an arc-shaped surface.
Further, the first and second sidewalls are tangent at a junction.
Further, on a section of the rotor lamination perpendicular to the axis, an included angle between a tangent of the first side wall and the second side wall at the joint and the d-axis half is 20-30 degrees.
Further, in a cross section of the through circular hole perpendicular to the axis, the sum of boundaries other than the open end is not less than 3/4 circular arcs.
Further, the total boundary of the through circular hole excluding the opening end is 4/5-9/10 circular arcs on a cross section perpendicular to the axis.
Through the technical scheme of the invention, the following technical effects can be realized:
the invention provides a rotor lamination group which can effectively reduce the deformation after being installed with a shaft body, and the reduction of the deformation is realized through the following two aspects: on the first hand, the deformation buffering parts are uniformly distributed around the through round hole, and the structural uniformity of the rotor lamination group around the axis is effectively ensured relative to an independently arranged key groove and the like; in the second aspect, through the setting of deformation buffering portion, can shift to the middle zone of two deformation buffering portions the concentrated deformation that originally concentrates to take place around half one of d axis, the advantage that this central zone takes place deformation lies in that holistic deformation can be blockked by from inside to outside first order choked flow portion, and makes deformation be close to near the axis body more to in the rotation process, reducible instability promotes the limit speed of axis body.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is an exploded view of rotor laminations in a rotor lamination stack;
FIG. 2 is a cross-sectional view of a rotor lamination of the present invention;
FIG. 3 is another cross-sectional view of a rotor lamination of the present invention;
FIG. 4 is an enlarged view at B in FIG. 3 (with hatching added for clarity);
FIG. 5 is an enlarged view at C in FIG. 3 (with increased cross-hatching for clarity);
FIG. 6 is a schematic diagram of the location of the deformed central region A;
FIG. 7 is a comparison of the distance between the junction of the first and second sidewalls and the half of the d-axis, and the extension length of the extension before and after it changes;
FIG. 8 is a schematic view of the shape of the rotor lamination at the location of the extension when the rotor lamination is compressed by the shaft;
FIG. 9 is a schematic view of the first sidewall being tangent to the cylindrical surface on which the inner wall of the through hole is located;
reference numerals:
01. rotor lamination; 02. a d-axis half;
1. a through round hole; 2. a magnetic flux guide part; 3. a flow-impeding portion; 4. a deformation buffer section; 41. a first side wall; 42. a second side wall; 43. a transition sidewall; 44. an extension portion.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
As shown in FIGS. 1-5, a rotor lamination group for a synchronous reluctance motor comprises a plurality of stacked rotor laminations 01, wherein the rotor laminations 01 comprise a cylindrical main body on the periphery, and the main body comprises the following structures:
the through round hole 1 is arranged in the center of the main body and is used for the shaft body to penetrate through; four d-axis half parts 02 evenly distributed around the through circular hole 1, at least two magnetic flux guiding parts 2 symmetrically extending in an arc strip shape are sequentially arranged between every two adjacent d-axis half parts 02 from inside to outside, and a hollow flow blocking part 3 obtained by blanking is arranged between every two adjacent magnetic flux guiding parts 2.
The main body also comprises four deformation buffering parts 4 which are in one-to-one correspondence with the axis half parts 02 and are symmetrical relative to the axis half parts 02, and the deformation buffering parts 4 are also hollowed-out areas obtained by cutting, are arranged at the edges of the through round holes 1 and are communicated with the through round holes 1 through opening ends; the edge profile of the deformation buffer 4 includes: a first sidewall 41 symmetrical about the d-axis half 02; two second side walls 42 symmetrically arranged at two sides of the first side wall 41, wherein the edges of the first side wall 41 and the second side walls 42 are butted; the other ends of the two second side walls 42 form open ends, which are gathered.
The invention provides a rotor lamination set capable of effectively reducing deformation after being installed with a shaft body, wherein the connection is realized in a manner that the lamination set and the shaft body respectively obtain different temperatures as described in the background technology, so that the lamination set which is properly expanded after being heated is sleeved outside the shaft body with relatively low temperature by smaller friction force, and the lamination set and the shaft body are connected by larger friction force after the temperature is recovered to normal temperature.
And the reduction of the deformation amount is realized by the following two aspects:
in a first aspect:
the deformation buffering parts 4 are uniformly distributed around the through round hole 1, and the structural uniformity of the rotor lamination group around the axis is effectively ensured relative to independently arranged key grooves and the like;
in a second aspect:
as shown in fig. 6, through the setting of deformation buffer, can concentrate originally and take place to shift to the middle zone a of two deformation buffers 4 on the concentrated deformation maximum degree around d axis half 02, the advantage that this central zone a takes place deformation lies in holistic deformation can be blockked by the choked flow portion 3 of the first order from inside to outside, because the choked flow portion 3 of the first order is the fretwork region, consequently, can make deformation to reach here and end, and make deformation be close to near the axis body more, thereby in the rotation process, instability can be reduced, the limit rotational speed of the axis body is improved.
Referring to fig. 5, the position where the deformation buffering portion 4 is connected to the through circular hole 1 in the figure, that is, the extending portions 44 formed on both sides of the opening end may tend to approach the first sidewall 41 in the process of being extruded, so as to buffer a portion of deformation, and when the connection portion of the first sidewall 41 and the second sidewall 42 is farther away from the d-axis half 02 and the extending length of the extending portion 44 is longer, the buffering effect is better, as compared in fig. 7, so that the deformation transmitted to the flow blocking portion 3 of the first stage is smaller. Of course, in order to ensure a sufficient magnetic flow area, the distance of the junction of the first and second side walls 41 and 42 from the d-axis half 02 is limited, and a minimum flow area between the junction and the nearest flow-blocking portion 3 is required to satisfy the magnetic flow requirement.
As a preference of the above embodiment, the second side wall 42 is an arc-shaped surface, and protrudes toward the outside of the deformation buffer 4. As shown in fig. 3, 5 and 6, this is shown to have a better effect than the case where the second side wall 42 is planar as shown in fig. 2 for the following reasons:
as shown in fig. 8, when the shaft body extrudes the sidewall of the through circular hole 1 to make the extending portion 44 get a tendency of approaching the first sidewall 41, the tail end of the extending portion 44 will tend to be pulled towards both sides, and the second sidewall 42 in the form of the arc-shaped surface can effectively avoid the risk of deformation of the sidewall of the extending portion 44 inside the deformation buffer portion 4 due to the above tendency, even when the deformation amount is larger, the arc-shaped surface has a larger tolerance for the deformation, thereby avoiding serious wrinkles and the like of the inside sidewall; the outward convex form of arcwall face makes it be closer to relatively and link up 1 inner wall of round hole, also carries out more sensitive reaction to extrusion deformation through littleer thickness.
In the present invention, there is also the advantage that, also with reference to fig. 8, when the extension 44 acquires a tendency to approach the first side wall 41, there is a tendency to pull the material on both sides of the d-axis half 02 and adjacent to the first side wall 41 towards both sides and towards the inside of the through-going circular hole 1, which also relieves the deformation to the extent that the d-axis half 02 extends, of course, only to a certain extent, since with the overall deformation of the central area a in fig. 6, there is necessarily a tendency to approach the q-axis for the material on both sides of this area, which relief can only be reflected around the junction of the first side wall 41 and the second side wall 42.
As a preference of the above embodiment, the first side wall 41 is an arc-shaped surface and protrudes toward the inside of the deformation buffer 4. Similarly, in the cases shown in fig. 3, 5 and 6, the configuration of this structure can reduce the area of the material removed for providing the deformation buffer 4, and make the first sidewall 41 closer to the opening end, so that the deformation condition that may drive the first sidewall 41 due to the deformation of the extension portion 44 is closer to the shaft body, and the deformation condition described herein includes the deformation of the first sidewall 41 caused by the tendency that the material on both sides of the d-axis half-part 02 and close to the first sidewall 41 is pulled towards both sides and towards the inside of the through circular hole 1 when the extension portion 44 obtains the tendency of approaching the first sidewall 41.
In order to ensure that the influence of deformation is within a certain range, the parallel distance between the axis of the through circular hole 1 and the most protruding part of the first side wall 41 is 1-1.2 times of the radius of the through circular hole 1.
As a preference of the above embodiment, the first side wall 41 is tangent to the cylindrical surface where the inner wall of the through circular hole 1 is located; in this way, as shown in fig. 9, the deformation buffer portion 4 is divided into two symmetrical portions, and in this embodiment, after the lamination stack is connected to the shaft body, the tangential position of the first side wall 41 and the cylindrical surface where the inner wall of the through circular hole 1 is located can be ensured to be attached to the shaft body, so that the connection stability is increased, and the above technical purpose of the present invention can be achieved.
Under this kind of embodiment, when accomplishing the installation and realizing connecting for the lamination stack when the axis body, above-mentioned tangent position and link up 1 inner wall of round hole all can with the axis body laminating to receive the extrusion of axis body, based on the description in the above-mentioned embodiment, the trend of deformation can exist to first lateral wall 41 after the extrusion, under this kind of trend, except buffering deformation, still can obtain the bigger area of contact with the axis body in tangent position, thereby realize dual technological effect.
Through the shape of reasonable control first side wall 41 and second side wall 42, can make the first side wall 41 and the second side wall 42 of the lamination stack after being connected with the axis body can tend to the laminating, the material of getting rid of under this kind of circumstances, and around getting rid of around the material and deformation buffering after the axis body extrusion has been realized to the deformation that takes place, of course, the emergence of deformation can not be overcome to this kind of buffering, and only through around the closely evenly distributed of axis body and reduced the degree of deformation on the one hand, and, make deformation laminate the axis body more, thereby avoid the instability in the rotation process, the realization of this kind of measure can improve the limit speed of rotation of axis body.
In order to avoid stress concentration, as shown in fig. 5, the first sidewall 41 and the second sidewall 42 are smoothly connected by a transition sidewall 43, which is an arc-shaped surface.
In the case where the first side wall 41 and the second side wall 42 are both arc-shaped surfaces, the first side wall 41 and the second side wall 42 are preferably tangent at the junction. In this case, as shown in fig. 9, the first side wall 41 and the second side wall 42 can be attached within a certain range of the joint after the deformation, and the attachment is more advantageous for the uniform dispersion of the deformation around the shaft body.
When the above described scheme of tangency at the junction is determined, in order to more conveniently determine the radius of the first sidewall 41, in a section of the rotor lamination 01 perpendicular to the axis, the angle between the tangent of the first sidewall 41 and the second sidewall 42 at the junction and the d-axis half 02 is 20 ° to 30 °.
In order to ensure stable connection with the shaft body, the sum of the boundaries of the through round hole 1 except for the opening end is not less than 3/4 circular arcs on the cross section perpendicular to the axis. Preferably, the total boundary of the cross section of the through circular hole 1 perpendicular to the axis is 4/5-9/10 circular arcs excluding the opening end.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. A rotor lamination stack for a synchronous reluctance machine comprising a plurality of rotor laminations arranged in a stack, the rotor laminations comprising a body having a periphery that is cylindrical, the body comprising: the through round hole is arranged in the center of the main body, is used for a shaft body to penetrate through and is fixed with the shaft body through friction force; the magnetic flux guiding parts are arranged between every two adjacent d-axis half parts from inside to outside in sequence, and a hollow choked flow part obtained by blanking is arranged between every two adjacent magnetic flux guiding parts;
the method is characterized in that: the main body also comprises four deformation buffering parts which are in one-to-one correspondence with the half parts of the d axis and are symmetrical relative to the half parts of the d axis, and the deformation buffering parts are hollow areas obtained by cutting, are arranged at the edges of the through round holes and are communicated with the through round holes through opening ends; the edge profile of the deformation buffer part comprises: a first sidewall symmetric about the d-axis half; the two second side walls are symmetrically arranged on two sides of the first side wall, and the edges of the first side wall and the second side wall are in butt joint; the other ends of the two second side walls form the opening ends, and the opening ends are gathered;
the second side wall is an arc-shaped surface and protrudes towards the outside of the deformation buffer part;
the first side wall is an arc-shaped surface and protrudes towards the inside of the deformation buffer part;
the first side wall is tangent to the cylindrical surface where the inner wall of the through round hole is located.
2. The rotor lamination stack for a synchronous reluctance machine according to claim 1, wherein the first and second sidewalls are smoothly connected by a transition sidewall, the transition sidewall being arcuate in shape.
3. The rotor lamination stack for a synchronous reluctance machine according to claim 1, wherein the first and second sidewalls are tangent at a junction.
4. Rotor lamination stack for a synchronous reluctance machine according to claim 3, wherein, in a section of the rotor lamination perpendicular to the axis, the angle between the tangent of the first and second side walls at the junction and the d-axis half is comprised between 20 ° and 30 °.
5. The rotor lamination stack for a synchronous reluctance machine according to claim 1, wherein, in a cross section of the through circular hole perpendicular to the axis, the sum of the boundaries other than the open end is not less than 3/4 arcs.
6. The rotor lamination stack for a synchronous reluctance machine according to claim 5, wherein the sum of the boundaries excluding the open end is 4/5-9/10 circular arcs in a cross section of the through circular hole perpendicular to the axis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202210356222.1A CN114448121B (en) | 2022-04-06 | 2022-04-06 | Rotor lamination set for synchronous reluctance motor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210356222.1A CN114448121B (en) | 2022-04-06 | 2022-04-06 | Rotor lamination set for synchronous reluctance motor |
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| Publication Number | Publication Date |
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| CN114448121A CN114448121A (en) | 2022-05-06 |
| CN114448121B true CN114448121B (en) | 2022-06-21 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012205442A (en) * | 2011-03-28 | 2012-10-22 | Mitsuba Corp | Electric motor |
| EP2709241A2 (en) * | 2012-09-13 | 2014-03-19 | Aisin Seiki Kabushiki Kaisha | Rotor of electric motor and rear wheel steering apparatus for vehicle including rotor |
| CN204906027U (en) * | 2015-08-25 | 2015-12-23 | 珠海格力电器股份有限公司 | Rotor structure and motor with same |
| CN110571955A (en) * | 2019-09-27 | 2019-12-13 | 珠海格力电器股份有限公司 | Motor rotor and synchronous reluctance motor |
-
2022
- 2022-04-06 CN CN202210356222.1A patent/CN114448121B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012205442A (en) * | 2011-03-28 | 2012-10-22 | Mitsuba Corp | Electric motor |
| EP2709241A2 (en) * | 2012-09-13 | 2014-03-19 | Aisin Seiki Kabushiki Kaisha | Rotor of electric motor and rear wheel steering apparatus for vehicle including rotor |
| CN204906027U (en) * | 2015-08-25 | 2015-12-23 | 珠海格力电器股份有限公司 | Rotor structure and motor with same |
| CN110571955A (en) * | 2019-09-27 | 2019-12-13 | 珠海格力电器股份有限公司 | Motor rotor and synchronous reluctance motor |
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| Publication number | Publication date |
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| CN114448121A (en) | 2022-05-06 |
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