CN107359709B - Stator punching sheet, motor and compressor - Google Patents
Stator punching sheet, motor and compressor Download PDFInfo
- Publication number
- CN107359709B CN107359709B CN201710750466.7A CN201710750466A CN107359709B CN 107359709 B CN107359709 B CN 107359709B CN 201710750466 A CN201710750466 A CN 201710750466A CN 107359709 B CN107359709 B CN 107359709B
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- peripheral portion
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- 238000004080 punching Methods 0.000 title claims abstract description 55
- 230000002093 peripheral effect Effects 0.000 claims abstract description 53
- 238000004804 winding Methods 0.000 claims abstract description 22
- 238000003475 lamination Methods 0.000 claims description 38
- 229910000976 Electrical steel Inorganic materials 0.000 claims description 11
- 238000000034 method Methods 0.000 description 15
- 238000004519 manufacturing process Methods 0.000 description 11
- 230000008569 process Effects 0.000 description 11
- 238000009434 installation Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 6
- 230000006378 damage Effects 0.000 description 5
- 230000007547 defect Effects 0.000 description 5
- 230000006872 improvement Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 230000007704 transition Effects 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 230000006698 induction Effects 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000004020 conductor Substances 0.000 description 3
- 238000003754 machining Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000004378 air conditioning Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000009827 uniform distribution Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
Classifications
-
- 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
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/14—Stator cores with salient poles
-
- 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
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/16—Stator cores with slots for windings
- H02K1/165—Shape, form or location of the slots
-
- 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)
- Manufacture Of Motors, Generators (AREA)
Abstract
The application provides a stator punching sheet, a motor and a compressor, wherein the stator punching sheet is used for the motor and comprises the following components: an outer peripheral portion which is a closed curve formed by a plurality of concentric circular arcs and straight lines; an inner peripheral portion provided inside the outer peripheral portion, the inner peripheral portion being a closed curve formed by stator teeth uniformly provided toward a geometric center of the inner peripheral portion and a connecting portion between two adjacent stator teeth; the side wall of the stator tooth forms a certain angle with the bottom wall of the connecting part. The stator punching sheet provided by the application comprises: the outer circumference portion and the inner circumference portion, wherein, the inner circumference evenly is provided with a plurality of stator teeth towards its geometric center, and the lateral wall of stator tooth is certain angle with the diapire of connecting portion to guaranteed when winding rectangular wire, rectangular wire can fill the space between two adjacent stator teeth, utilizes the space between two adjacent stator teeth, twines more wires, and then promotes the power density and the work efficiency of motor.
Description
Technical Field
The application relates to the technical field of motors, in particular to a stator punching sheet, a motor and a compressor.
Background
With the continuous change of air conditioning energy efficiency standards, the compressor needs to have high power density and high efficiency motor increasingly. In addition, due to the trend of miniaturization of air conditioning compressors, the outer diameter and height of motors of compressors of the same capacity are becoming smaller and smaller. Taking a 3HP variable frequency compressor as an example, the outer diameter is reduced from 125mm to 112mm.
The compressor can be miniaturized continuously due to the continuous increase of the power density of the motor. The increase in power density has been due to the continual increase in performance of electromagnetic steel plates and the continual increase in energy density of rotor permanent magnets over the past 10 years.
Due to the intense market competition, the volume of compressors is required to be further miniaturized, for example from the current 112mm outer diameter to 100mm. Since the performances of electromagnetic steel plates and permanent magnets are already approaching the limit, it is difficult to achieve further improvement of power density by replacement of steel plates and permanent magnet materials. Therefore, when the design is miniaturized, a new means is required to further achieve an increase in the motor power density.
The improvement of the filling rate of the motor slot also brings about the improvement of the power density. The slot filling rate of current motors is already at a fairly high level. Therefore, a conductor having a rectangular cross section is beginning to be used instead of a conductor having a circular cross section which is widely used at present.
In the prior art, as shown in fig. 1 to 4, 1' represents a stator punching sheet, 12' represents an outer peripheral portion, 14' represents an inner peripheral portion, 142' represents stator teeth, 1422' represents a main body portion, 1424' represents a top portion, 144' represents a stator slot, and 2' represents a wire, as can be seen from fig. 2, when the wire 2' is rectangular, a gap is obviously present in the stator slot 144', that is, the wire 2' cannot fill the stator slot 144', so that the filling rate of the actual stator slot 144' is reduced, and the wire 2' is easily wound at an end portion, so that the end portion size exceeds the limit, and further, vibration of the wire 2' causes insulation damage of the wire during operation of the motor, and reliability during operation of the motor is reduced.
Disclosure of Invention
The present application aims to solve at least one of the technical problems existing in the prior art.
To this end, a first aspect of the present application provides a stator lamination.
A second aspect of the application provides an electric machine.
A third aspect of the present application provides a compressor.
In view of this, a first aspect of the present application proposes a stator lamination for an electric machine, comprising: an outer peripheral portion which is a closed curve formed by a plurality of concentric circular arcs and straight lines; an inner peripheral portion provided inside the outer peripheral portion, the inner peripheral portion being a closed curve formed by stator teeth uniformly provided toward a geometric center of the inner peripheral portion and a connecting portion between two adjacent stator teeth; the side wall of the stator tooth forms a certain angle with the bottom wall of the connecting part.
The stator punching sheet provided by the application comprises: an outer peripheral portion and an inner peripheral portion, wherein a plurality of concentric circular arcs and straight lines form an outer peripheral portion of a closed curve to ensure the integrity of the entire apparatus; further, the inner peripheral part is uniformly provided with a plurality of stator teeth towards the geometric center of the stator teeth, and the plurality of stator teeth are connected by utilizing the connecting parts between two adjacent stator teeth, so that positioning is provided for the wires wound on the stator punching sheet, and stable installation of the wires in the use process of the motor is ensured; furthermore, the side wall of the stator teeth and the bottom wall of the connecting part are at a certain angle, so that the defect that when the wire is of a rectangular structure, the wire wound by the stator punching sheet is insufficient due to the arc transition of the connecting part and the stator teeth in the prior art is avoided, namely, when the rectangular wire is wound on the stator punching sheet, the rectangular wire can fill the gap between two adjacent stator teeth at the moment, particularly can be tightly attached to the connecting part of the side wall of the stator teeth and the connecting part, so that the gap between the two adjacent stator teeth is utilized, more wires are wound, and the power density and the working efficiency of the motor are improved.
The stator punching sheet according to the application can also have the following additional technical characteristics:
in the above technical solution, preferably, the side walls of the stator teeth are perpendicular to the bottom wall of the connecting portion.
In this technical scheme, set up the lateral wall of stator tooth with the diapire looks perpendicular of connecting portion to guarantee the angle and the rectangle looks adaptation of stator tooth and connecting portion junction, namely, rectangle wire can closely press close to each other with the lateral wall of stator tooth and the diapire of connecting portion, and then guarantee to deposit more rectangle wires between two adjacent stator teeth, and then promote its performance, of course, in actual production process, the lateral wall of stator tooth can not be completely perpendicular with the diapire of connecting portion, as long as it is approximately perpendicular, can guarantee that rectangle wire closely laminates with it, all can be realized.
In the above technical solution, preferably, the stator teeth include a main body portion and a top portion connected to the main body portion; the main body part is connected with the connecting part of the inner periphery part, and the top part is formed by connecting a top circular arc and top straight lines positioned at two ends of the top circular arc; the distance between the intersection points of the two ends of the top arc and the top straight line is larger than or equal to the width of the main body part of the stator tooth.
In this technical solution, the stator teeth comprise: the motor comprises a main body part and a top part, wherein the main body part is used for positioning a wire wound on a stator punching sheet so as to ensure the normal use of the motor; further, the top comprises top circular arc and top straight line, and the distance between the intersection point of top circular arc both ends and top straight line is greater than or equal to the width of main part to ensured the width of top and be greater than the width of main part, namely stator tooth's top and inner periphery are formed with one end open-ended mounting groove, set up the wire in this mounting groove, in motor working process, the top is outstanding in the part of main part can be for the wire with spacing effect, avoids the wire to drop from the mounting groove, in order to ensure motor's normal use.
In the above technical solution, preferably, the arc on the outer peripheral portion and the top arc are concentric.
In the technical scheme, the circular arc on the periphery and the circular arc on the top are concentric, so that on one hand, secondary centering is avoided in the process of processing and manufacturing, the working procedure is simplified, and the working efficiency is improved; on the other hand, the structure of the same center ensures the uniform distribution of the mass of the whole stator punching sheet and the integral coordination, and in the working process of the motor, the mutual interference between the rotor and the stator is avoided so as to ensure the normal use of the motor.
In the above technical solution, preferably, a stator slot is formed between two adjacent stator teeth; wherein, the contour line of the top of the stator slot is parallel to the contour line of the bottom of the stator slot.
In the technical scheme, stator grooves are formed between two adjacent stator teeth to realize the installation and positioning of the lead; further, the contour lines of the top and the bottom of the stator groove are parallel to each other, on one hand, the parallel structures ensure that the distances between the top and the bottom of the groove are equal, and the stator groove is convenient to process and manufacture and mount wires so as to improve the production efficiency; on the other hand, the distance between the top of the slot and the bottom of the slot is equal, so that the number of wires in the slot of the installation and the stator is equal everywhere, and the working performance of the motor is further ensured.
In any of the above-described aspects, preferably, the opening width of the stator slot is greater than twice the width of the wire wound in the stator slot.
In this technical scheme, through setting up the width of stator groove open-ended as the mode more than twice of the wire width of winding in the stator groove, guaranteed that the wire can install inside the stator groove, and, the opening width more than twice, the winding of the wire of being convenient for to improve the assembly rate of motor, and then reduce manufacturing cost.
In any of the above solutions, preferably, the minimum width of the stator teeth is greater than the maximum width of the yoke of the stator laminations.
In this technical scheme, through the mode that is greater than the maximum width of stator towards piece yoke with the first width setting of stator tooth to guarantee that the stator tooth has sufficient intensity, specifically, when winding the wire on the stator tooth, in order to make full use of space winding more wire, need the wire tightly twine the stator tooth, at this moment, through the minimum width setting of stator tooth is greater than the maximum width of stator towards piece yoke, thereby guarantee that the stator tooth has sufficient intensity, the condition that the stator tooth is broken can not appear.
In any of the above aspects, preferably, the diameter of the outer peripheral portion is 60mm or more and 150mm or less.
In the technical scheme, the maximum diameter of the outer periphery is valued between 60mm and 150mm, so that the size of the stator punching sheet is ensured, unnecessary waste or insufficient power caused by overlarge or undersize of the stator punching sheet is avoided, and particularly, the proper diameter can be selected according to actual requirements for users to use.
In any of the above embodiments, preferably, the number of stator slots is 13 or less.
In the technical scheme, the number of the stator slots is limited to be not more than 13, so that on one hand, the damage to the strength of the stator slots caused by the excessive machining of the stator slots on the stator punching sheet is avoided, and the service life of the stator punching sheet is shortened; on the other hand, the number of the stator slots is properly selected on the premise of ensuring the power requirement of the motor, so that the structure is simplified, and fewer processing procedures are performed, thereby reducing the cost.
In any of the above technical solutions, preferably, the stator lamination is a silicon steel plate with a thickness of less than 0.35 mm.
In the technical scheme, the stator punching sheet is made of the silicon steel plate with the thickness smaller than 0.35mm, the iron loss of the silicon steel plate is low, the stacking coefficient is high, the magnetic induction intensity is good, and the punching sheet performance is good, so that the working performance of the stator punching sheet is ensured to be good; further, the thickness of the silicon steel plate is selected to be 0.35mm, on one hand, the rotor and the stator are mutually matched, and enough induction current is generated for a user to use; on the other hand, avoid because the stator punching is too thick, and the condition that causes great vortex to harm takes place to extension motor's life, and through the restriction to the board thickness of blade of silicon steel, under the prerequisite that satisfies its functional demand, avoid unnecessary product materials, reduction in production cost lightens product weight, promotes user's use experience.
A second aspect of the present application proposes an electric machine comprising: the cross section of the wire of the winding is square or round; and the stator punching sheet according to any one of the first aspect of the application, the winding being wound on the stator teeth of the stator punching sheet.
The motor provided by the application comprises the stator punching sheet according to any one of the first aspect of the application, so that the motor has all the beneficial effects of the stator punching sheet, which are not stated one by one, and in addition, the winding with the square or circular cross section of the wire is wound on the stator punching sheet, so that a magnetic field is generated, and the conversion of energy is realized, so that the normal use of the motor is ensured.
A third aspect of the present application provides a compressor comprising: a stator lamination according to any one of the aspects of the application; or the motor according to the second aspect of the application.
The compressor provided by the application comprises the stator punching sheet according to any one of the technical schemes in the first aspect; or the motor according to the second aspect of the present application, so that the motor according to any one of the first aspect of the present application or the motor according to the second aspect of the present application has all the advantages, which are not described herein.
Additional aspects and advantages of the application will be set forth in part in the description which follows, or may be learned by practice of the application.
Drawings
The foregoing and/or additional aspects and advantages of the application will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
FIG. 1 is a schematic view of a prior art stator lamination;
FIG. 2 is a schematic view of the stator laminations of the embodiment of FIG. 1 after rectangular winding wires are mounted;
FIG. 3 is a schematic diagram of a prior art stator lamination mechanism;
FIG. 4 is a schematic diagram of the distribution of winding wires after rectangular winding wires are mounted to the stator laminations of the embodiment shown in FIG. 2;
FIG. 5 is a schematic view of a stator lamination according to an embodiment of the application;
FIG. 6 is a schematic view of a stator lamination according to an embodiment of the application;
FIG. 7 is a schematic view of a stator lamination according to an embodiment of the application;
FIG. 8 is a schematic view of the stator laminations of the embodiment of FIG. 5 after rectangular winding wires are mounted;
FIG. 9 is a schematic diagram of the distribution of winding wires after rectangular winding wires are mounted to the stator laminations of the embodiment shown in FIG. 8;
fig. 10 is a simulated contrast diagram of cogging torque for the stator lamination of the embodiment of fig. 5 versus the stator lamination of the embodiment of fig. 1 based on the same rotor.
The correspondence between the reference numerals and the component names in fig. 1 to 4 is:
1 'stator laminations, 12' outer periphery, 14 'inner periphery, 142' stator teeth, 1422 'body, 1424' top, 144 'stator slots, 2' wires;
the correspondence between the reference numerals and the component names in fig. 5 to 9 is:
1 stator lamination, 12 outer periphery, 14 inner periphery, 142 stator teeth, 1422 main body, 1424 top, 144 stator slots, 2 wires.
Detailed Description
In order that the above-recited objects, features and advantages of the present application will be more clearly understood, a more particular description of the application will be rendered by reference to the appended drawings and appended detailed description. It should be noted that, without conflict, the embodiments of the present application and features in the embodiments may be combined with each other.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, however, the present application may be practiced otherwise than as described herein, and therefore the scope of the present application is not limited to the specific embodiments disclosed below.
The stator punching sheet 1, the motor, and the compressor provided according to some embodiments of the present application are described below with reference to fig. 5 to 10.
As shown in fig. 5 to 9, an embodiment of a first aspect of the present application proposes a stator lamination 1 for an electric machine, comprising: an outer peripheral portion 12, wherein the outer peripheral portion 12 is a closed curve formed by a plurality of concentric circular arcs and straight lines; an inner peripheral portion 14 provided inside the outer peripheral portion 12, the inner peripheral portion 14 being a closed curve formed by stator teeth 142 provided uniformly toward the geometric center of the inner peripheral portion 14 and a connecting portion between two adjacent stator teeth 142; wherein the side walls of the stator teeth 142 are perpendicular to the bottom wall of the connection.
The stator punching sheet 1 provided by the application comprises: an outer peripheral portion 12 and an inner peripheral portion 14, wherein a plurality of concentric circular arcs and straight lines form a closed curve of the outer peripheral portion 12 to ensure the integrity of the entire device; further, the inner peripheral portion 14 is uniformly provided with a plurality of stator teeth 142 toward the geometric center thereof, and the plurality of stator teeth 142 are connected by using a connecting portion between two adjacent stator teeth 142, thereby providing positioning for the wire 2 wound on the stator lamination 1, so as to ensure stable installation of the wire 2 during use of the motor; furthermore, the side wall of the stator teeth 142 is at a certain angle with the bottom wall of the connecting portion, so that the defect that the utilization rate of the stator punching sheet 1 is low due to the fact that the wire 2 is not enough when the wire 2 is of a rectangular structure caused by arc transition at the connecting portion of the connecting portion and the stator teeth 142 in the prior art is avoided, namely, when the rectangular wire 2 is wound on the stator punching sheet 1, the rectangular wire 2 can fill in a gap between two adjacent stator teeth 142 at the moment and especially can be tightly attached to the connecting portion of the side wall of the stator teeth 142, so that more wires 2 are wound by utilizing the gap between the two adjacent stator teeth 142, and further the power density and the working efficiency of the motor are improved.
In one embodiment of the application, the side walls of the stator teeth 142 are preferably perpendicular to the bottom wall of the connection.
In this embodiment, the side walls of the stator teeth 142 are perpendicular to the bottom wall of the connecting portion, so as to ensure that the angle between the connecting portion and the connecting portion of the stator teeth 142 is mutually adapted to the rectangle, that is, the rectangular wire 2 can be closely attached to the side walls of the stator teeth 142 and the bottom wall of the connecting portion, so as to ensure that more rectangular wires are stored between two adjacent stator teeth 142, and further improve the service performance of the device.
In one embodiment of the present application, the stator teeth 142 preferably include a main body portion 1422 and a top portion 1424 connected to the main body portion 1422; wherein, the main body portion 1422 is connected with the connecting portion of the inner peripheral portion 14, and the top portion 1424 is formed by connecting a top portion 1424 arc and top portions 1424 positioned at two ends of the top portion 1424 arc in a straight line; the distance between the intersection of the circular arc ends of the apex 1424 and the straight line of the apex 1424 is equal to or greater than the width of the main body portion 1422 of the stator tooth 142.
In this embodiment, the stator teeth 142 include: a main body portion 1422 and a top portion 1424, wherein the positioning of the wire 2 wound on the stator lamination 1 is achieved through the main body portion 1422, so as to ensure the normal use of the motor; further, the top 1424 is formed by a top arc and a top straight line, and the distance between the intersection points of the two ends of the top arc and the top straight line is greater than or equal to the width of the main body 1422, so that the width of the top 1424 is ensured to be greater than the width of the main body 1422, that is, the top 1424 and the inner peripheral portion 14 of the stator teeth 142 are formed with a mounting groove with one open end, the wire 2 is arranged in the mounting groove, and in the working process of the motor, the part of the top 1424 protruding from the main body 1422 can limit the wire 2, so that the wire 2 is prevented from falling from the mounting groove, and the normal use of the motor is ensured.
In one embodiment of the present application, the arc on the outer peripheral portion 12 is preferably concentric with the arc of the top portion 1424.
In this embodiment, the arc on the outer peripheral portion 12 and the arc on the top 1424 are at the same center, so that on one hand, during the process of machining and manufacturing, secondary centering is avoided, and the procedure is simplified, so as to improve the working efficiency; on the other hand, the structure of the same center ensures the uniform distribution of the mass and the integral coordination of the whole stator punching sheet 1, and the mutual interference between the rotor and the stator is avoided in the working process of the motor so as to ensure the normal use of the motor.
In one embodiment of the present application, preferably, a stator slot 144 is formed between two adjacent stator teeth 142; wherein the contour of the slot top 1424 of the stator slot 144 is parallel to the contour of the slot bottom of the stator slot 144.
In this embodiment, stator slots 144 are formed between adjacent stator teeth 142 to enable mounting positioning of the conductor 2; further, the contour lines of the groove top 1424 and the groove bottom of the stator groove 144 are parallel to each other, on one hand, the parallel structure ensures that the distances between the groove top 1424 and the groove bottom are equal, so that the processing and the manufacturing are convenient, and the installation of the lead 2 are convenient, so that the production efficiency is improved; on the other hand, the distances between the groove top 1424 and the groove bottom are equal, so that the number of wires 2 in the stator groove 144 is guaranteed to be equal everywhere, and the working performance of the motor is further guaranteed.
In one embodiment of the present application, it is preferable that the opening width of the stator slot 144 is greater than twice the width of the wire 2 wound in the stator slot 144.
In this embodiment, by setting the width of the opening of the stator slot 144 to be more than twice the width of the wire 2 wound in the stator slot 144, it is ensured that the wire 2 can be installed inside the stator slot 144, and the more than twice the opening width is convenient for winding the wire 2 to increase the assembly speed of the motor, thereby reducing the production cost.
In one embodiment of the present application, the minimum width of the stator teeth 142 is preferably greater than the maximum width of the yoke of the stator plate 1.
In this embodiment, by setting the first width of the stator teeth 142 to be larger than the maximum width of the yoke of the stator punching sheet 1 in order to ensure that the stator teeth 142 have sufficient strength, particularly, when the wire 2 is wound on the stator teeth 142, in order to wind more wires 2 with sufficient space, it is necessary that the wire 2 is tightly wound around the stator teeth 142, and at this time, by setting the minimum width of the stator teeth 142 to be larger than the maximum width of the yoke of the stator punching sheet 1, it is ensured that the stator teeth 142 have sufficient strength without breakage of the stator teeth 142.
In one embodiment of the present application, the diameter of the outer peripheral portion 12 is preferably 60mm or more and 150mm or less.
In this embodiment, the maximum diameter of the outer peripheral portion 12 is set to be between 60mm and 150mm, so that the size of the stator lamination 1 is ensured, unnecessary waste or insufficient power caused by the excessive or insufficient stator lamination 1 is avoided, and specifically, a proper diameter can be selected for users according to actual requirements.
In one embodiment of the present application, the number of stator slots 144 is preferably 13 or less.
In this embodiment, by defining the number of stator slots 144 to be no more than 13, on one hand, excessive machining of stator slots 144 on stator plate 1 is avoided to damage the strength thereof, so as to reduce the service life of stator plate 1; on the other hand, the number of the stator slots 144 is properly selected on the premise of ensuring the power requirement of the motor, so that the structure is simplified, and fewer processing procedures are performed, thereby reducing the cost.
In one embodiment of the application, the stator lamination 1 is preferably a silicon steel plate having a thickness of less than 0.35 mm.
In the embodiment, the stator punching sheet 1 is made of a silicon steel plate with the thickness smaller than 0.35mm, the iron loss of the silicon steel plate is low, the stacking coefficient is high, the magnetic induction intensity is good, and the punching sheet performance is good, so that the working performance of the stator punching sheet 1 is ensured to be good; further, the thickness of the silicon steel plate is selected to be 0.35mm, on one hand, the rotor and the stator are mutually matched, and enough induction current is generated for a user to use; on the other hand, avoid because the stator punching is too thick, and the condition that causes great vortex to harm takes place to extension motor's life, and through the restriction to the board thickness of blade of silicon steel, under the prerequisite that satisfies its functional demand, avoid unnecessary product materials, reduction in production cost lightens product weight, promotes user's use experience.
In a specific embodiment, as shown in fig. 5, the stator lamination 1 includes: the motor comprises an outer peripheral part 12 and an inner peripheral part 14, wherein the inner peripheral part 14 is uniformly provided with a plurality of stator teeth 142 towards the geometric center of the inner peripheral part, and the plurality of stator teeth 142 are connected by utilizing a connecting part between two adjacent stator teeth 142, so that positioning is provided for a wire 2 wound on a stator punching sheet 1, and stable installation of the wire 2 in the motor use process is ensured; furthermore, the side walls of the stator teeth 142 are arranged vertically or approximately vertically with the bottom wall of the connecting portion, so that the defect that the utilization rate of the stator punching sheet 1 is low when the lead 2 is in a rectangular structure due to the arc transition at the connecting portion of the connecting portion and the stator teeth 142 in the prior art is avoided, namely, when the rectangular lead 2 is wound on the stator punching sheet 1, the side walls of the stator teeth 142 are arranged vertically with the bottom wall of the connecting portion, at the moment, the rectangular lead 2 can fill in the gap between two adjacent stator teeth 142, particularly can be tightly attached to the connecting portion of the side walls of the stator teeth 142, so that more leads 2 are wound by using the gap between the two adjacent stator teeth 142, and further, the power density and the working efficiency of the motor are improved; further, a stator slot 144 is formed between two adjacent stator teeth 142 to realize the installation and positioning of the lead 2, and the bottom of the stator slot 144 is formed by an arc and two symmetrical straight lines, the straight line of the top 1424 of the stator slot 144 is parallel to the straight line of the bottom of the slot, and is perpendicular to the straight line of the stator teeth 142, the opening width of the stator slot 144 is 4 mm, and the arc width of the top 1424 of the stator teeth 142 is equal to the width of the main body 1422 of the stator teeth 142.
In a specific embodiment, as shown in fig. 6, the stator lamination 1 includes: the motor comprises an outer peripheral part 12 and an inner peripheral part 14, wherein the inner peripheral part 14 is uniformly provided with a plurality of stator teeth 142 towards the geometric center of the inner peripheral part, and the plurality of stator teeth 142 are connected by utilizing a connecting part between two adjacent stator teeth 142, so that positioning is provided for a wire 2 wound on a stator punching sheet 1, and stable installation of the wire 2 in the motor use process is ensured; furthermore, the side walls of the stator teeth 142 are arranged vertically or approximately vertically with the bottom wall of the connecting portion, so that the defect that the utilization rate of the stator punching sheet 1 is low when the lead 2 is in a rectangular structure due to the arc transition at the connecting portion of the connecting portion and the stator teeth 142 in the prior art is avoided, namely, when the rectangular lead 2 is wound on the stator punching sheet 1, the side walls of the stator teeth 142 are arranged vertically with the bottom wall of the connecting portion, at the moment, the rectangular lead 2 can fill in the gap between two adjacent stator teeth 142, particularly can be tightly attached to the connecting portion of the side walls of the stator teeth 142, so that more leads 2 are wound by using the gap between the two adjacent stator teeth 142, and further, the power density and the working efficiency of the motor are improved; further, a stator slot 144 is formed between two adjacent stator teeth 142 to realize the installation and positioning of the lead 2, and the bottom of the stator slot 144 is formed by 3 sections of circular arcs, the top 1424 of the stator slot 144 is also formed by circular arcs, and the top 1424 of the stator slot 144 is approximately parallel to the bottom of the stator teeth 142.
In a specific embodiment, as shown in fig. 7, the stator lamination 1 includes: the motor comprises an outer peripheral part 12 and an inner peripheral part 14, wherein the inner peripheral part 14 is uniformly provided with a plurality of stator teeth 142 towards the geometric center of the inner peripheral part, and the plurality of stator teeth 142 are connected by utilizing a connecting part between two adjacent stator teeth 142, so that positioning is provided for a wire 2 wound on a stator punching sheet 1, and stable installation of the wire 2 in the motor use process is ensured; furthermore, the side walls of the stator teeth 142 are arranged vertically or approximately vertically with the bottom wall of the connecting portion, so that the defect that the utilization rate of the stator punching sheet 1 is low when the lead 2 is in a rectangular structure due to the arc transition at the connecting portion of the connecting portion and the stator teeth 142 in the prior art is avoided, namely, when the rectangular lead 2 is wound on the stator punching sheet 1, the side walls of the stator teeth 142 are arranged vertically with the bottom wall of the connecting portion, at the moment, the rectangular lead 2 can fill in the gap between two adjacent stator teeth 142, particularly can be tightly attached to the connecting portion of the side walls of the stator teeth 142, so that more leads 2 are wound by using the gap between the two adjacent stator teeth 142, and further, the power density and the working efficiency of the motor are improved; further, stator slots 144 are formed between two adjacent stator teeth 142 to mount and position the wires 2, and the width of the arc of the top 1424 of the stator teeth 142 is greater than the width of the main body 1422 of the stator teeth 142.
As shown in fig. 8 and 9, a second aspect of the present application provides an electric motor, including: a winding, wherein the section of the wire 2 of the winding is square; and the stator lamination 1 according to any one of the embodiments of the first aspect of the application, the windings are wound on the stator teeth 142 of the stator lamination 1.
The motor provided by the application comprises the stator punching sheet 1 according to any one of the embodiments of the first aspect of the application, so that the motor has all the beneficial effects of the stator punching sheet 1, which are not stated herein, and in addition, the winding with the square cross section of the wire 2 is wound on the stator punching sheet 1, so that a magnetic field is generated, and the conversion of energy is realized, so that the normal use of the motor is ensured.
In a specific embodiment, as shown in fig. 10, the dashed line represents the torque diagram of the stator slot 144 of the motor using the stator lamination 1 according to the embodiment of the first aspect of the present application, and the solid line represents the torque diagram of the stator slot 144 of the motor using the stator lamination 1 according to the prior art, and it is clear from the figure that, under the same condition, the motor using the stator lamination 1 according to the embodiment of the first aspect of the present application provides a torque far greater than that of the motor using the stator lamination 1 according to the prior art, which is a significant technical improvement.
An embodiment of a third aspect of the present application provides a compressor, comprising: a stator punching sheet 1 according to an embodiment of any one of the first aspects of the present application; or an electric machine according to an embodiment of the second aspect of the application.
The compressor provided by the application comprises the stator punching sheet 1 according to any embodiment of the first aspect of the application; or the second aspect of the application, and thus has all the advantages of the stator lamination 1 according to any one of the embodiments of the first aspect of the application or the second aspect of the application, not stated here.
In the description of the present application, the term "plurality" means two or more, unless explicitly defined otherwise, the orientation or positional relationship indicated by the terms "upper", "lower", etc. are based on the orientation or positional relationship shown in the drawings, merely for convenience of description of the present application and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present application; the terms "coupled," "mounted," "secured," and the like are to be construed broadly, and may be fixedly coupled, detachably coupled, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.
In the description of the present specification, the terms "one embodiment," "some embodiments," "particular embodiments," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above is only a preferred embodiment of the present application, and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (9)
1. A stator lamination for an electric machine, comprising:
an outer peripheral portion which is a closed curve formed by a plurality of concentric circular arcs and straight lines;
an inner peripheral portion provided inside the outer peripheral portion, the inner peripheral portion being a closed curve formed by stator teeth provided uniformly toward a geometric center of the inner peripheral portion and a connecting portion between two adjacent stator teeth;
the side wall of the stator tooth forms a certain angle with the bottom wall of the connecting part;
stator grooves are formed between two adjacent stator teeth;
the opening width of the stator slot is more than twice of the width of the wire wound in the stator slot;
the minimum width of the stator teeth is greater than the maximum width of the yoke of the stator punching sheet;
the stator teeth comprise a main body part and a top part connected with the main body part;
wherein the main body part is connected with the connecting part of the inner peripheral part, and the top part is formed by connecting a top circular arc and top straight lines positioned at two ends of the top circular arc;
the distance between the intersection points of the two ends of the top arc and the top straight line is larger than or equal to the width of the main body part of the stator tooth;
the top straight line is positioned at one side of the stator teeth facing the center of the top circular arc.
2. The stator plate of claim 1 wherein,
the side walls of the stator teeth are perpendicular to the bottom wall of the connecting portion.
3. The stator plate of claim 1 wherein,
the circular arc on the periphery and the top circular arc are concentric.
4. The stator plate of claim 1 wherein,
the contour line of the groove top of the stator groove is parallel to the contour line of the groove bottom of the stator groove.
5. The stator plate of claim 1 wherein,
the diameter of the outer peripheral part is more than or equal to 60mm and less than or equal to 150mm.
6. The stator plate of claim 1 wherein,
the number of the stator slots is less than or equal to 13.
7. The stator plate of any one of claims 1 to 6 wherein,
the stator punching sheet is a silicon steel plate with the thickness smaller than 0.35 mm.
8. An electric machine, comprising:
a winding, wherein the section of a wire of the winding is square or round; and
A stator lamination as defined in any one of claims 1 to 7, the windings being wound on stator teeth of the stator lamination.
9. A compressor, comprising:
a stator lamination as defined in any one of claims 1 to 7; or (b)
The motor of claim 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710750466.7A CN107359709B (en) | 2017-08-28 | 2017-08-28 | Stator punching sheet, motor and compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710750466.7A CN107359709B (en) | 2017-08-28 | 2017-08-28 | Stator punching sheet, motor and compressor |
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| CN107359709A CN107359709A (en) | 2017-11-17 |
| CN107359709B true CN107359709B (en) | 2023-09-01 |
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| CN201710750466.7A Active CN107359709B (en) | 2017-08-28 | 2017-08-28 | Stator punching sheet, motor and compressor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| EP3706288A1 (en) * | 2019-03-06 | 2020-09-09 | Siemens Aktiengesellschaft | Sheet package for an electric machine |
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