CN216290376U - Motor, compressor and electrical equipment - Google Patents
Motor, compressor and electrical equipment Download PDFInfo
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- CN216290376U CN216290376U CN202123070619.4U CN202123070619U CN216290376U CN 216290376 U CN216290376 U CN 216290376U CN 202123070619 U CN202123070619 U CN 202123070619U CN 216290376 U CN216290376 U CN 216290376U
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Abstract
The utility model provides a motor, a compressor and electrical equipment, wherein the motor comprises: the stator assembly comprises a stator and a winding; the rotor is arranged in the stator; the stator includes: the stator punching comprises a plurality of segmented punching sheets which can be spliced and connected; the piece is punched and is included: a tooth and a yoke; the number of pole pairs of the rotor is p, the maximum rotating speed of the rotor is n, p and n meet the requirement that n/p is more than 60 and less than or equal to 100. The split type splicing structure is designed for the stator, winding of the coil is convenient to achieve, the coil can be installed on two adjacent segmented punching sheets after winding is completed, the difficulty of winding the coil is reduced, more coils can be wound under the condition that the size of the stator is the same, and the output torque and the motor efficiency of the motor can be improved.
Description
Technical Field
The utility model belongs to the technical field of motor equipment, and particularly relates to a motor, a compressor and electrical equipment.
Background
In the stator of the motor in the prior art, the number of turns of the coil wound on the stator is related to the output torque of the motor, and in order to improve the output torque of the motor, the number of turns of the coil needs to be increased as much as possible.
However, due to the influence of the stator structure, it is difficult to achieve a high slot filling ratio during the winding process, and in order to wind the coil with more turns on the stator, the size of the stator needs to be increased, which results in a large size of the motor.
SUMMERY OF THE UTILITY MODEL
The present invention is directed to solving one of the technical problems of the prior art or the related art.
In view of the above, in a first aspect, the present invention provides an electric machine comprising: the stator assembly comprises a stator and a winding wound on the stator; a rotor disposed within the stator; the stator includes: the stator punching sheets comprise a plurality of pieced punching sheets which can be spliced and connected; any one piece punching in a plurality of piece punching includes: a tooth portion; the yoke part is arranged on one side, away from the axis of the stator punching sheet, of the tooth part, and a groove body is arranged on one side, away from the tooth part, of the yoke part; the number of pole pairs of the rotor is p, the maximum rotating speed of the rotor is n, the unit of n is rotation/second, p and n meet the requirement that n/p is more than 60 and less than or equal to 100.
The application provides a motor, including stator module, stator module includes stator, rotor and the winding of establishing on the stator.
The stator is provided with a stator slot, the rotor is arranged in the stator slot, specifically, the stator and the rotor are coaxially arranged, and the rotor can rotate relative to the stator. Further, the stator is also provided with windings, and particularly, the windings are arranged on the stator teeth. The stator is equipped with a plurality of tooth portions including the stator towards the piece of range upon range of setting, the stator towards the piece, and a plurality of stator teeth have been constituted to the range upon range of setting of the tooth portion of a plurality of stator towards the piece. The stator teeth are arranged on the inner side of the stator and arranged towards the rotor. The winding is wound on the stator teeth and used for generating magnetic induction lines in a power-on state, and the rotor rotates relative to the stator, namely, the rotor rotates relative to the winding, cuts the magnetic induction lines and generates force for driving the rotor to rotate, so that the motor can run.
The stator provided by the utility model is of a split structure, and specifically comprises a plurality of stator punching sheets which are arranged in a stacking manner, the shapes and the structures of the stator punching sheets are the same, and the plurality of stator punching sheets are arranged in a stacking manner, so that the plurality of stator punching sheets jointly form a main body of the stator. For being overall structure with the stator design, the processing degree of difficulty of the split type stator that constitutes through a plurality of stator punching sheets reduces, also is liable to maintain more and changes.
In order to further reduce the processing difficulty of the stator core and improve the slot fullness rate of the motor, the stator punching sheet is also set to be of a split type structure. The stator punching sheet comprises a plurality of block punching sheets, and the plurality of block punching sheets can be connected in a splicing manner. The split connection between the segmented punching sheets is easy to separate the segmented punching sheets in the stator, so that the product is easier to maintain, and the product maintenance cost is reduced.
One side that deviates from the tooth portion in yoke portion is provided with the cell body, has seted up the cell body in the periphery of stator promptly, and the cell body can increase the stator and be located the interval between the other parts of stator periphery side to be favorable to the compressor oil return, improve the smooth and easy nature of oil return, be favorable to improving the operating stability of compressor.
In one possible design, the channel includes a trapezoidal channel. The trapezoidal groove body is convenient to be clamped with the tool, so that the tool can drive the plurality of partitioned punching sheets to move. In the winding process, the plurality of segmented punching sheets are linearly distributed, and after the winding is completed, the tool drives the plurality of segmented punching sheets to form the stator punching sheet in a surrounding mode. The groove body is arranged to be the trapezoid groove, so that convenience of the tool for driving the blocking punching sheet to move can be improved.
In one possible application, the plurality of channels other than the trapezoidal channel are rectangular. Through setting up at least one cell body into the rectangular channel, the rectangular channel can regard as discernment groove, can realize the location to the motor through discernment groove to be convenient for assemble to the compressor to the motor.
In one possible application, the yoke is cut in a radial direction of the stator punching sheet, and the groove body passes through a center line of a section of the yoke.
The central line of cell body process yoke portion can further improve the oil return effect, improves the smooth and easy nature of oil return, is favorable to improving the operating stability of compressor.
The number of pole pairs of the rotor is related to the torque of the motor, but simply limiting the number range of the number of pole pairs to adjust the torque easily causes the displacement of the compressor on which the motor is installed to hardly reach the standard required for operation. The larger the rotating speed of the rotor is, the larger the displacement of the compressor is, and the larger the number of pole pairs is, the lower the maximum rotating speed of the rotor is, so that the maximum rotating speed of the rotor is associated with the number of pole pairs of the rotor, the ratio of the maximum rotating speed of the rotor to the number of pole pairs of the rotor is limited between 60 and 100, the torque can be reduced under the condition of the same displacement, the operating point of the motor is changed, and the efficiency of the motor is improved.
In addition, according to the stator in the above technical solution provided by the present invention, the following additional technical features may be further provided:
in one possible design, any one of the plurality of segment stampings further comprises: the first connecting part is arranged on one edge of the segmented punching sheet extending along the radial direction of the stator punching sheet; the first connecting part of one segmented punching sheet can be connected with the second connecting part of the adjacent segmented punching sheet in a splicing manner; the first connection portion is configured as a projection and the second connection portion is configured as a recess adapted to the projection.
In this design, in order to realize the connection between the blocking punching sheets, a first connection portion and a second connection portion are further provided on the blocking stator. Specifically, first connecting portion set up in yoke portion along the radial edge that extends of stator punching, and the second connecting portion set up in yoke portion along the radial another edge that extends of stator punching, promptly, first connecting portion and second connecting portion locate the both sides of piecemeal punching respectively along the circumference of stator punching. The first connecting portion of one piece of lamination is cooperated with the second connecting portion of another adjacent piece of lamination, so that the connection of the two pieces of lamination is realized. The plurality of the partitioned punching sheets are arranged along the circumferential direction of the stator, and any two adjacent partitioned punching sheets are matched through the first connecting portion and the second connecting portion, so that connection among the plurality of the partitioned punching sheets is realized, and the stator punching sheets are formed in a surrounding mode.
The first connecting portion and the second connecting portion can be separated from each other, and two adjacent segmented punching sheets are separated from each other in the state that the first connecting portion and the second connecting portion are separated from each other, so that the stator punching sheets are decomposed. The stator can be understood in the working process, the phenomenon that a certain block punching sheet is damaged can occur, and the first connecting portion and the second connecting portion can be separated at the moment, so that the damaged block punching sheet is taken out from the stator punching sheet, the damaged block punching sheet is only replaced and maintained independently, the stator punching sheet is not required to be integrally replaced, and the maintenance cost is reduced.
Both can interconnect between first connecting portion and the second connecting portion, also mutual separation has realized the amalgamation between the piecemeal connection, easily carries out independent split to the piecemeal towards the piece in the stator, makes the product easily maintain more, has reduced the product maintenance cost.
Through setting up the piece towards the structure that can splice each other and connect with the piece, thereby when processing the stator towards the piece, only process a plurality of pieces towards the piece can, assemble a plurality of pieces towards piece parts into the stator towards the piece again, compare in processing a complete stator towards the piece, the degree of difficulty of processing piece towards piece part reduces, thereby manufacturing cost is reduced, this kind of stator simple structure, accessible automation line realizes the automated production to the stator, and, design the split type mosaic structure with the stator, be convenient for realize the winding of coil and establish, can install two adjacent piece towards the piece again after the coil is established, reduce the degree of difficulty of establishing the coil, consequently, under the condition that can the stator size is the same, establish more coils around, improve the winding of coil and establish the number of turns, be favorable to improving the groove fullness rate of motor. On the basis of not improving the size of the motor, the number of turns of the winding coil is increased, so that the output torque and the motor efficiency of the motor can be improved.
First connecting portion are constructed as protruding piece, and the second connecting portion are constructed as the recess, promptly, are unsmooth complex structure between first connecting portion and the second connecting portion, recess and protruding looks adaptation realize the connection cooperation of first connecting portion and second connecting portion.
Through setting up first connecting portion as protrusion, set up second connecting portion as with protrusion matched with recess, made between first connecting portion and the second connecting portion form unsmooth complex structure, promoted the connection reliability, reduced the processing degree of difficulty.
The segmented stator punching sheet comprises a tooth part and a yoke part, wherein the yoke part is connected with the tooth part. Under the state that a plurality of sub-stators splice into the stator punching, yoke portion sets up in the one side that is close to the stator punching outward flange, and tooth portion sets up in the one side that is close to the stator punching inward flange.
Further, the first connecting portion is arranged on one edge of the yoke portion, which extends along the radial direction of the stator punching sheet; the second connecting portion are arranged on the other edge of the yoke portion, which extends along the radial direction of the stator punching sheet. The first connecting portion and the second connecting portion are arranged on the two edges of the yoke portion, which extend along the radial direction of the stator punching sheet, so that two arbitrarily connected block punching sheets in the plurality of block punching sheets are connected with each other, and the stator punching sheets are formed in a surrounding mode. And first connecting portion and second connecting portion both can interconnect, also alternate segregation has realized the amalgamation between the piece towards the piece and has connected, easily carries out the independent split to the piece towards the piece in the stator, makes the product easily maintain more, has reduced the product maintenance cost.
In one possible design, the number of teeth of the stator is Z, Z and n are satisfied, 20 < n/Z ≦ 34.
In this design, the maximum motor rotation speed affects the torque of the motor, but simply limiting the maximum motor rotation speed is not limited by the number of teeth of the stator, which easily causes a change in the harmonic magnetic field of the motor and affects the efficiency of the motor. Therefore, the number of teeth of the stator and the maximum rotating speed of the rotor are combined, so that the torque can be reduced under the condition of the same displacement, the running rotating speed of the motor is improved, and the efficiency of the motor is improved.
In one possible design, the maximum rotational speed n of the rotor is satisfied, 120 < n ≦ 200.
In the design, the maximum rotating speed of the rotor is limited in the range, and the operation stability of the motor can be ensured.
In one possible design, the number of the segmented laminations in one stator lamination is M, the number of pole pairs of the rotor is N, wherein M and N satisfy: 2/3, M is less than or equal to 6, N is less than or equal to 2.
In the design, the number of the segmented laminations in the stator laminations, the number of the magnetic pole pairs of the rotor and the proportional relationship between the segmented laminations and the magnetic pole pairs of the rotor all affect the performance of the motor, and in order to ensure that the performance parameters of the motor are in a better range, the number of the segmented laminations in the stator laminations, the number of the magnetic pole pairs of the rotor and the proportional relationship between the segmented laminations and the magnetic pole pairs of the rotor are limited.
Specifically, the number of the segmented punching sheets in one stator punching sheet is M, the number of magnetic pole pairs of the rotor is N, wherein M and N satisfy the following conditions: 2/3, M is less than or equal to 6, N is less than or equal to 2.
The number of the segmented punching sheets in one stator punching sheet is limited to be less than or equal to 6, the magnetic pole pair number of the rotor is less than or equal to 2, and the ratio of the number of the segmented punching sheets in one stator punching sheet to the magnetic pole pair number of the rotor is 2/3, so that the performance of the motor can be guaranteed to be in a better range, and the motor can meet the use requirement. In one possible design, the stator further comprises: the avoiding gap is arranged on the surface, facing the rotor, of the tooth part, and the distance between the avoiding gap and a first tooth shoe of the tooth part is smaller than the distance between the avoiding gap and a second tooth shoe of the tooth part; wherein, along the direction of rotation of rotor, the rotor passes through first tooth boots and second tooth boots in proper order.
In this technical scheme, the stator still includes dodges the breach, dodges the breach and sets up in the tooth and be used for towards the surface of rotor. The tooth portion includes first tooth boots and second tooth boots, and along the direction of rotation of rotor, the rotor passes through first tooth boots and second tooth boots in proper order. The distance between the avoiding notch and the first tooth boot is smaller than the distance between the avoiding notch and the second tooth boot, namely the avoiding notch is close to one side of the first tooth boot.
The avoiding notch is formed in the surface, facing the rotor, of the tooth part, so that the convex part on the rotor can be avoided through avoiding the notch in the process of assembling the stator and the rotor, and assembly interference is avoided.
In one possible design, the stator further comprises: and the aluminum coil is wound on the tooth part.
In this design, the material of the coil wound around the tooth portion is limited, the coil is made of an aluminum material, that is, the coil is formed by winding an aluminum wire around the tooth portion, the unit price of the aluminum wire is low, and the aluminum wire is used as the coil, so that the material cost of the motor can be reduced for the most part.
In one possible design, the outer diameter of the stator lamination is R1, the inner diameter of the stator lamination is R2, and the relation between R1 and R2 satisfies that: 0.57 is not less than R2/R1 is not less than 0.5.
In this design, the relationship between the outer diameter and the inner diameter of the stator lamination is further defined. It can understand, the ratio between the internal diameter of stator punching and the external diameter of stator punching can produce certain influence to the performance of motor, specifically, can all produce the influence to heat dissipation, magnetic flux density and the whole weight of motor, for each parameter of balanced motor, makes the motor have higher price/performance ratio, prescribes a limit to certain within range with the ratio between the internal diameter of stator punching and the external diameter of stator punching.
Specifically, the outer diameter of the stator punching sheet is R1, the inner diameter of the stator punching sheet is R2, and the relation between R1 and R2 satisfies: 0.57 is not less than R2/R1 is not less than 0.5.
The outer diameter of the stator punching sheet can be 101.15mm, and the inner diameter of the stator punching sheet can be 53.3 mm.
The ratio range between the inner diameter of the stator punching sheet and the outer diameter of the stator punching sheet is limited, so that the ratio between the inner diameter of the stator punching sheet and the outer diameter of the stator punching sheet is more than or equal to 0.5 and less than or equal to 0.57, each parameter of the motor can reach an ideal range, and the motor has higher cost performance.
In one possible design, the rotor is taken in the radial direction of the rotor, the outer contour of the cross section of the rotor being circular.
In this design, the rotor is taken in the radial direction of the rotor, the cross section of the rotor in the radial direction may or may not be a regular circle, and a circle passing through the outermost contour of the rotor is set as a contour circle, that is, a contour circle of the radial cross section of the rotor passes through a point or a line of the radial cross section of the rotor farthest from the center of the circle, the contour circle passes through the axis of the rotor, and if the radial cross section of the rotor is a regular circle, the contour circle coincides with the outer edge of the radial cross section of the rotor.
Further, the outer contour of the rotor may be circular. The outer contour of the rotor is set to be circular in the working process of the motor, so that the wind abrasion loss generated in the rotating process of the rotor can be effectively reduced, and the working efficiency of the motor is improved.
In one possible design, the electric machine further comprises: and the magnetic flux guide grooves penetrate through the rotor along the axial direction of the motor.
In this design, the rotor is also provided with a plurality of flux guide slots. Specifically, the rotor is formed by stacking a plurality of rotor punching sheets, a plurality of magnetic flux guide grooves are formed in any one of the rotor punching sheets, and the magnetic flux guide grooves are communicated and distributed in the rotor punching sheets along the axial direction of the motor, namely, the magnetic flux guide grooves are communicated and distributed in the rotor punching sheets along the axial direction of the motor. It is understood that during operation of the machine, radial electromagnetic waves are generated, which cause increased noise. In order to improve the noise problem of the motor, a plurality of magnetic flux guide grooves are arranged on the rotor in a penetrating mode along the axial direction of the motor, so that the lowest-order radial electromagnetic force wave of the motor can be reduced, and the noise caused by the radial electromagnetic force wave is further reduced.
The rotor is provided with the plurality of magnetic flux guide grooves, and the magnetic flux guide grooves are distributed on the rotor in a penetrating manner along the axial direction of the motor, so that the lowest-order radial electromagnetic force wave of the motor can be reduced, and the noise caused by the radial electromagnetic force wave is further reduced.
In one possible design, the rated torque of the motor is T1, the inner diameter of the stator lamination is R2, and the unit volume torque of the rotor is T2, wherein T1, R2 and T2 satisfy:
5.18×10-7≤T1×R2-3×T2-1≤1.17×10-6，5kN·m·m-3≤T2≤45kN·m·m-3。
in this design, the range of the combined variables among the rated torque of the motor, the inner diameter of the stator lamination, and the unit volume torque of the rotor is limited. The output torque of the motor can meet the requirements of equipment arranged on the motor by limiting the range of the combined variable.
Specifically, the rated torque of the motor is T1, the inner diameter of the stator punching sheet is R2, and the unit volume torque of the rotor is T2, wherein the following conditions are satisfied among T1, R2 and T2:
5.18×10-7≤T1×R2-3×T2-1≤1.17×10-6，
5kN·m·m-3≤T2≤45kN·m·m-3。
the combined variable of the rated torque of the motor, the inner diameter of the stator punching sheet and the unit volume torque of the rotor is limited to be more than or equal to 5.18 multiplied by 10-7And is not more than 1.17X 10-6And a torque per unit volume of the rotor is limited to 5kN m or more-3And not more than 45kN · m-3The output torque of the motor can meet the requirements of equipment arranged on the motor.
In a second aspect, the present invention provides a compressor comprising: as in any of the first aspect may be provided
A motor in the meter; and a compression part, to which the motor is connected.
In a third aspect, the present invention provides an electrical device, comprising: an apparatus main body; and the compressor in the second aspect, the compressor being connected to the apparatus main body.
Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 shows a schematic structural diagram of a partitioning sheet according to an embodiment of the present invention;
fig. 2 shows a schematic structural diagram of a stator lamination of an embodiment of the utility model;
fig. 3 shows a schematic structural diagram of a rotor sheet according to an embodiment of the utility model;
fig. 4 shows a schematic configuration of a compressor according to another embodiment of the present invention.
Wherein, the correspondence between the reference numbers and the part names in fig. 1 to 4 is:
100 stators, 110 segmented punching sheets, 111 teeth, 1111 first tooth shoes, 1112 second tooth shoes, 112 yokes, 113 first connecting parts, 114 second connecting parts, 120 stator punching sheets, 121 groove bodies, 122 avoiding notches, 200 rotors, 210 rotor punching sheets, 211 first magnetic steel grooves, 212 second magnetic steel grooves, 300 compressors, 310 compression parts, 311 cylinders, 312 pistons, 320 crankshafts, 330 main bearings and 340 auxiliary bearings.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the utility model will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
Motors, compressors, and electrical devices provided according to some embodiments of the present invention are described below with reference to fig. 1 to 4.
In some embodiments of the present invention, as shown in fig. 1 and 2 in combination, there is provided an electric machine comprising: a stator assembly and a rotor 200, the stator assembly including a stator 100 and a winding wound on the stator 100; the rotor 200 is disposed inside the stator 100; the stator 100 includes: the stator punching sheets 120 are stacked, and each stator punching sheet 120 comprises a plurality of segmented punching sheets 110 which can be spliced and connected; any one of the plurality of the segment punching sheets 110 includes: tooth portion, yoke portion, first connecting portion and second connecting portion, yoke portion 112 locate and deviate from the one side of stator punching 120 axle center in tooth portion 111, and the one side that deviates from tooth portion 111 in yoke portion 112 is provided with cell body 121. The first connecting portion 113 is disposed at an edge of the segmented laminations 110 extending along the radial direction of the stator laminations 120; the second connecting portion 114 is arranged at the other edge of the stator punching sheet 120 extending in the radial direction, and the first connecting portion 113 of one segmented punching sheet 110 can be connected with the second connecting portion 114 of the adjacent segmented punching sheet 110 in a splicing manner; the first connection portion 113 is configured as a projection, and the second connection portion 114 is configured as a groove that fits with the projection; the number of pole pairs of the rotor 200 is p, the maximum rotating speed of the rotor 200 is n, p and n meet, and n/p is more than 60 and less than or equal to 100.
The motor provided by the embodiment comprises a stator assembly, wherein the stator assembly comprises a stator 100, a rotor 200 and a winding wound on the stator 100.
Wherein, stator 100 is provided with the stator groove inside, and rotor 200 is arranged in the stator groove, specifically, stator 100 is provided with rotor 200 coaxially, and rotor 200 can rotate relative to stator 100. Further, the stator 100 is also provided with windings, specifically, the windings are provided on the stator teeth. The stator 100 includes the stator lamination 120 of range upon range of setting, is equipped with a plurality of tooth portions 111 on the stator lamination 120, and the setting of the tooth portion 111 range upon range of a plurality of stator laminations 120 has constituted a plurality of stator teeth. The stator teeth are provided on the inner side of the stator 100, facing the rotor 200. The winding is wound on the stator teeth, the winding is used for generating magnetic induction lines in a power-on state, and in the rotating process of the rotor 200 relative to the stator 100, namely, relative to the winding, the rotor 200 rotating relative to the winding cuts the magnetic induction lines to generate force for driving the rotor 200 to rotate, so that the motor can run.
The stator 100 provided in this embodiment is a split structure, and specifically, the stator 100 includes a plurality of stator laminations 120, the plurality of stator laminations 120 are stacked, the shape and the structure of each stator lamination 120 are the same, and the plurality of stator laminations 120 are stacked, so that the plurality of stator laminations 120 jointly form a main body of the stator 100. For designing stator 100 as overall structure, the processing degree of difficulty of split type stator 100 through a plurality of stator punching sheet 120 constitution reduces, also is more easily maintained and is changed.
In order to further reduce the processing difficulty of the iron core of the stator 100 and improve the slot fullness rate of the motor, the stator punching sheet 120 is also set to be of a split structure. The stator punching sheet 120 includes a plurality of segment punching sheets 110, and the segment punching sheets 110 are connected to each other in a split manner. Specifically, in order to realize the connection between the segmented laminations 110, a first connection portion 113 and a second connection portion 114 are further provided on the segmented stator 100. Specifically, the first connecting portion 113 is disposed at one edge of the yoke portion 112 extending along the radial direction of the stator punching sheet 120, and the second connecting portion 114 is disposed at the other edge of the yoke portion 112 extending along the radial direction of the stator punching sheet 120, that is, the first connecting portion 113 and the second connecting portion 114 are respectively disposed at two sides of the segmented punching sheet 110 along the circumferential direction of the stator punching sheet 120. The first connecting portion 113 of one piece of block punching sheet 110 is matched with the second connecting portion 114 of another adjacent piece of block punching sheet 110, so that the connection of the two piece of block punching sheets 110 is realized. The plurality of segmented punching sheets 110 are arranged along the circumferential direction of the stator 100, so that any two adjacent segmented punching sheets 110 are matched through the first connecting portion 113 and the second connecting portion 114, connection among the plurality of segmented punching sheets 110 is achieved, and the stator punching sheet 120 is formed in a surrounding mode.
The first connection portion 113 and the second connection portion 114 may also be separated from each other, and in a state where the first connection portion 113 and the second connection portion 114 are separated, two adjacent segmented laminations 110 are separated from each other, so that the stator laminations 120 are disassembled. It can be understood that, in the working process of the stator 100, a phenomenon that a certain piece of the segmented punching sheet 110 is damaged may occur, and at this time, the first connecting portion 113 and the second connecting portion 114 may be separated, so that the damaged segmented punching sheet 110 is taken out of the stator punching sheet 120, and only the damaged segmented punching sheet 110 is replaced and repaired individually, and the stator punching sheet 120 does not need to be replaced integrally, thereby reducing the maintenance cost.
The first connecting portion 113 and the second connecting portion 114 can be connected with each other or separated from each other, so that the split connection between the blocks is realized, the separate splitting of the block punching sheet 110 in the stator 100 is easy, the product is easier to maintain, and the product maintenance cost is reduced.
Through setting up the piecemeal towards piece 110 to the structure that can amalgamate the connection each other, thereby when processing stator towards piece 120, only process a plurality of piecemeal towards piece 110 can, assemble a plurality of piecemeal towards piece 110 parts into stator towards piece 120 again, compare in processing a complete stator towards piece 120, the degree of difficulty of processing piecemeal towards piece 110 parts reduces, thereby manufacturing cost has been reduced, this kind of stator 100 simple structure, accessible automation line realizes the automated production to stator 100, and, design stator 100 into split type mosaic structure, be convenient for realize the winding of coil, can install two adjacent piecemeal towards piece 110 after the coil winding is established, reduce the degree of difficulty of winding the coil, consequently, can be under the same circumstances of stator 100 size, more coils are wound, improve the winding of coil and establish the number of turns, be favorable to improving the groove fullness rate of motor. On the basis of not improving the size of the motor, the number of turns of the winding coil is increased, so that the output torque and the motor efficiency of the motor can be improved.
The first connecting portion 113 is configured as a protruding member, and the second connecting portion 114 is configured as a groove, that is, a concave-convex fit structure is formed between the first connecting portion 113 and the second connecting portion 114, and the groove is adapted to the protrusion, so that the first connecting portion 113 and the second connecting portion 114 are connected and matched.
Through setting up first connecting portion 113 as protruding piece, set up second connecting portion 114 as with protruding piece matched with recess, made between first connecting portion 113 and the second connecting portion 114 form unsmooth complex structure, promoted the connection reliability, reduced the processing degree of difficulty.
The segmented stator segment 120 includes a tooth 111 and a yoke portion 112, wherein the yoke portion 112 is connected to the tooth 111. In a state where the plurality of segmented stators 100 are spliced into the stator lamination 120, the yoke portion 112 is disposed on a side close to an outer edge of the stator lamination 120, and the tooth portion 111 is disposed on a side close to an inner edge of the stator lamination 120.
Further, the first connection portion 113 is disposed at an edge of the yoke portion 112 extending along the radial direction of the stator punching sheet 120; the second connection portion 114 is disposed at the other edge of the yoke portion 112 extending in the radial direction of the stator lamination 120. The first connecting portion 113 and the second connecting portion 114 are respectively arranged on two edges of the yoke portion 112 extending along the radial direction of the stator punching sheet 120, so that two arbitrarily connected block punching sheets 110 in the plurality of block punching sheets 110 are connected with each other, and the stator punching sheet 120 is formed in a surrounding manner. The first connecting portion 113 and the second connecting portion 114 can be connected with each other or separated from each other, so that the split connection between the blocks is realized, the separate splitting of the block punching sheet 110 in the stator 100 is easy, the product is easier to maintain, and the product maintenance cost is reduced.
One side of the yoke portion 112, which is away from the tooth portion 111, is provided with a groove 121, that is, the groove 121 is formed in the outer periphery of the stator 100, and the groove 121 can increase the distance between the stator 100 and other components located on the outer periphery of the stator 100, so that oil return of the compressor 300 is facilitated, the smoothness of the oil return is improved, and the operation stability of the compressor 300 is facilitated.
In one possible embodiment, the channel 121 comprises a trapezoidal channel. The trapezoidal groove body 121 is convenient to be clamped with a tool, so that the tool can drive the plurality of partitioned punching sheets 110 to move. In the winding process, the plurality of segmented punching sheets 110 are linearly distributed, and after the winding is completed, the fixture drives the plurality of segmented punching sheets 110 to surround to form the stator punching sheet 120. The groove body 121 is a trapezoidal groove, so that convenience of the fixture for driving the blocking punching sheet 110 to move can be improved.
In one possible application, the plurality of grooves 121 other than the trapezoidal groove 121 are rectangular. Through setting up at least one cell body 121 into the rectangular channel, the rectangular channel can regard as discernment groove, can realize the location to the motor through discernment groove to be convenient for assemble to the compressor to the motor.
In one possible application, the yoke portion 112 is taken along a radial direction of the stator punching sheet 120, and the slot 121 passes through a center line of a section of the yoke portion 112.
The groove 121 passes through the center line of the yoke 112, so that the oil return effect can be further improved, the oil return smoothness is improved, and the operation stability of the compressor 300 is improved.
The number of pole pairs of the rotor 200 is related to the torque of the motor, but simply limiting the number range of the number of pole pairs to adjust the torque easily causes the displacement of the compressor 300 in which the motor is installed to hardly meet the required standard for operation. The higher the rotation speed of the rotor 200 is, the larger the displacement of the compressor 300 is, and the larger the number of pole pairs is, the lower the maximum rotation speed of the rotor 200 is, therefore, the maximum rotation speed of the rotor 200 is related to the number of pole pairs of the rotor 200, the ratio of the maximum rotation speed of the rotor 200 to the number of pole pairs of the rotor 200 is limited between 60 and 100, the torque can be reduced under the condition of the same displacement, the operating point of the motor operation is changed, and the efficiency of the motor is improved.
In one possible embodiment, the number of teeth of the stator 100 is Z, Z and n satisfy 20 < n/Z ≦ 34.
In this embodiment, the maximum rotation speed of the motor affects the torque of the motor, but simply limiting the maximum rotation speed of the motor out of the limitation of the number of teeth of the stator 100 easily causes a change in the harmonic magnetic field of the motor, which affects the efficiency of the motor. Therefore, the number of teeth of the stator 100 and the maximum rotating speed of the rotor 200 are combined, so that the torque can be reduced under the condition of the same displacement, the running rotating speed of the motor is increased, and the efficiency of the motor is improved.
In one possible embodiment, the maximum rotational speed n of the rotor 200 is satisfied, 120 < n ≦ 200.
In this embodiment, limiting the maximum rotation speed of the rotor 200 within this range can ensure the operational stability of the motor.
In a possible embodiment, the number of the segmented laminations 110 in one stator lamination 120 is M, the number of pole pairs of the rotor 200 is N, where M and N satisfy: 2/3, M is less than or equal to 6, N is less than or equal to 2.
In this embodiment, the number of the segmented laminations 110 in the stator lamination 120, the number of the pairs of the magnetic poles of the rotor 200, and the proportional relationship therebetween all affect the performance of the motor, and in order to ensure that the performance parameters of the motor are within a good range, the number of the segmented laminations 110 in the stator lamination 120, the number of the pairs of the magnetic poles of the rotor 200, and the proportional relationship therebetween are defined.
Specifically, the number of the segmented laminations 110 in one stator lamination 120 is M, the number of magnetic pole pairs of the rotor 200 is N, where M and N satisfy: 2/3, M is less than or equal to 6, N is less than or equal to 2.
The number of the segmented laminations 110 in one stator lamination 120 is limited to be less than or equal to 6, the number of the magnetic pole pairs of the rotor 200 is less than or equal to 2, and the ratio of the number of the segmented laminations 110 in one stator lamination 120 to the number of the magnetic pole pairs of the rotor 200 is 2/3, so that the performance of the motor can be ensured to be in a better range, and the motor can meet the use requirement.
As shown in fig. 2, 3 and 4, in one possible embodiment, the stator 100 further includes: an avoidance gap 122, the avoidance gap 122 being provided on the surface of the tooth portion 111 facing the rotor 200, a distance between the avoidance gap 122 and the first tooth shoe 1111 of the tooth portion 111 being smaller than a distance between the avoidance gap 122 and the second tooth shoe 1112 of the tooth portion 111; wherein, along the rotation direction of the rotor 200, the rotor 200 sequentially passes through the first tooth shoe 1111 and the second tooth shoe 1112.
In this design, the stator 100 further includes an avoidance gap 122, and the avoidance gap 122 is provided on the surface of the tooth portion 111 for facing the rotor 200. Tooth 111 includes a first tooth shoe 1111 and a second tooth shoe 1112, and rotor 200 passes first tooth shoe 1111 and second tooth shoe 1112 in sequence in a rotation direction of rotor 200. The distance between the avoidance gap 122 and the first tooth shoe 1111 is smaller than the distance between the avoidance gap 122 and the second tooth shoe 1112, that is, the avoidance gap 122 is close to the first tooth shoe 1111 side.
By providing the relief notch 122 on the surface of the tooth 111 facing the rotor 200, the relief notch 122 can be used for relieving a projecting part on the rotor during the process of assembling the stator 100 and the rotor 200, so that the assembly interference is avoided.
In a possible embodiment, the stator 100 further comprises: an aluminum coil is wound around the tooth 111.
In this embodiment, the material of the coil wound around the tooth 111 is limited, the coil is made of aluminum, that is, the coil is formed by winding an aluminum wire around the tooth 111, the unit price of the aluminum wire is low, and the aluminum wire is used as the coil, so that the material cost of the motor can be reduced in most cases.
With reference to fig. 1 and fig. 2, in a possible embodiment, the outer diameter of the stator lamination 120 is R1, the inner diameter of the stator lamination 120 is R2, and the relationship between R1 and R2 satisfies: 0.57 is not less than R2/R1 is not less than 0.5.
In this embodiment, the relationship between the outer diameter and the inner diameter of the stator lamination 120 is further defined. It can be understood that, the ratio between the inner diameter of the stator lamination 120 and the outer diameter of the stator lamination 120 has a certain influence on the performance of the motor, specifically, the heat dissipation, the magnetic flux density and the overall weight of the motor are all influenced, in order to balance various parameters of the motor, the motor has a high cost performance, and the ratio between the inner diameter of the stator lamination 120 and the outer diameter of the stator lamination 120 is limited in a certain range.
Specifically, the outer diameter of the stator lamination 120 is R1, the inner diameter of the stator lamination 120 is R2, and the relationship between R1 and R2 satisfies: 0.57 is not less than R2/R1 is not less than 0.5.
The outer diameter of the stator lamination 120 may be 101.15mm, and the inner diameter of the stator lamination 120 may be 53.3 mm.
By limiting the range of the ratio between the inner diameter of the stator lamination 120 and the outer diameter of the stator lamination 120, the ratio between the inner diameter of the stator lamination 120 and the outer diameter of the stator lamination 120 is greater than or equal to 0.5 and less than or equal to 0.57, so that each parameter of the motor can reach an ideal range, and the motor has high cost performance.
Referring to fig. 2, 3 and 4, in one possible embodiment, the rotor 200 is taken along a radial direction of the rotor 200, and an outer contour of a cross section of the rotor 200 is circular.
In this embodiment, the rotor 200 is taken along the radial direction of the rotor 200, the cross section of the rotor 200 in the radial direction may be a regular circle or may not be a regular circle, and a circle passing through the outermost contour of the rotor 200 is set as a contour circle passing through a point or a line where the radial cross section of the rotor 200 is farthest from the center of the circle, the contour circle passing through the axis of the rotor 200, and if the radial cross section of the rotor 200 is a regular circle, the contour circle coincides with the outer edge of the radial cross section of the rotor 200.
Further, the outer contour of the rotor 200 may be circular. It can be understood that, in the working process of the motor, the rotor 200 is in a rotating state, and the outer contour of the rotor 200 is set to be circular, so that the wind abrasion loss generated in the rotating process of the rotor 200 can be effectively reduced, and the working efficiency of the motor is improved.
As shown in fig. 3, in one possible embodiment, the motor further comprises: the plurality of flux guide grooves are provided in the rotor 200 so as to penetrate in the axial direction of the motor.
In this embodiment, the rotor 200 is also provided with a plurality of flux guide grooves. Specifically, the rotor 200 is formed by stacking a plurality of rotor sheets 210, and a plurality of flux guide slots are provided on any one of the rotor sheets 210, and the flux guide slots are distributed in the rotor sheets 210 in a penetrating manner along the axial direction of the motor, that is, distributed in the rotor sheets 210 in a penetrating manner along the axial direction of the motor. It is understood that during operation of the machine, radial electromagnetic waves are generated, which cause increased noise. In order to improve the noise problem of the motor, a plurality of magnetic flux guide grooves are arranged on the rotor 200 along the axial direction of the motor in a penetrating way, so that the lowest-order radial electromagnetic force wave of the motor can be reduced, and the noise caused by the radial electromagnetic force wave can be further reduced.
The plurality of magnetic flux guide grooves are formed in the rotor 200 and are distributed on the rotor 200 in a penetrating manner along the axial direction of the motor, so that the lowest-order radial electromagnetic force waves of the motor can be reduced, and the noise caused by the radial electromagnetic force waves is reduced.
The rotor punching sheet 210 is provided with a first magnetic steel groove 211 and a second magnetic steel groove 212, and magnetic steels can be respectively arranged in the first magnetic steel groove 211 and the second magnetic steel groove 212 to form a pair of magnetic poles.
In one possible embodiment, the rated torque of the motor is T1, the inner diameter of the stator lamination 120 is R2, and the torque per unit volume of the rotor 200 is T2, where T1, R2, and T2 satisfy: 5.18X 10-7≤T1×R2-3×T2-1≤1.17×10-6，5kN·m·m-3≤T2≤45kN·m·m-3。
In this embodiment, the range of the combined variables among the rated torque of the motor, the inner diameter of the stator lamination 120, and the torque per unit volume of the rotor 200 is defined. It can be understood that the output torque of the motor is affected by the combined variable among the rated torque of the motor, the inner diameter of the stator lamination 120 and the unit volume torque of the rotor 200, and the output torque of the motor can meet the requirement of the equipment arranged in the motor by limiting the range of the combined variable.
Specifically, the rated torque of the motor is T1, the inner diameter of the stator lamination 120 is R2, and the unit volume torque of the rotor 200 is T2, where T1, R2, and T2 satisfy:
5.18×10-7≤T1×R2-3×T2-1≤1.17×10-6，
5kN·m·m-3≤T2≤45kN·m·m-3。
the combined variable of the rated torque of the motor, the inner diameter of the stator punching sheet 120 and the unit volume torque of the rotor 200 is limited to be more than or equal to 5.18 multiplied by 10-7And is not more than 1.17X 10-6And the torque per unit volume of the rotor 200 is limited to 5kN m or more-3And not more than 45kN · m-3The output torque of the motor can meet the requirements of equipment arranged on the motor.
As shown in fig. 4, in an embodiment of the present invention, there is provided a compressor 300, the compressor 300 including: the motor and the compressing part 310 in any of the above possible embodiments, the motor is connected to the compressing part 310.
Specifically, the compression part 310 includes a cylinder 311 and a piston 312, in order to enable a motor to be connected to the compression part 310 and drive the compression part 310 to operate, some connecting members are further provided in the compressor 300, specifically including a crankshaft 320, a main bearing 330 and a sub-bearing 340, the motor is connected to the piston 312 through the crankshaft 320 to drive the piston 312 to move in the cylinder 311, and the main bearing 330 and the sub-bearing 340 are provided outside the crankshaft 320 to support and limit the crankshaft 320 so that the crankshaft 320 can normally rotate.
The compressor 300 proposed in the present application has all the advantages of the motor provided in the above embodiments because the compressor 300 includes the motor proposed in the above embodiments.
In an embodiment of the present invention, an electrical apparatus is provided, the electrical apparatus including: the equipment main body and the compressor in the above embodiments, the compressor is connected to the equipment main body.
The electrical equipment provided by the utility model comprises an equipment main body and a compressor, wherein the compressor is connected with the equipment main body, and when the electrical equipment runs, the compressor and the equipment main body are matched to run together so as to enable the electrical equipment to run normally.
The electrical equipment provided by the application comprises the compressor provided by the embodiment, so that the electrical equipment has all the beneficial effects of the compressor provided by the embodiment.
In the present invention, the term "plurality" means two or more unless explicitly defined otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means 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 utility model. In this specification, the schematic representations of the terms used above 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 description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (15)
1. An electric machine, comprising:
the stator assembly comprises a stator and a winding wound on the stator;
a rotor disposed within the stator;
the stator includes:
the stator punching sheets are stacked and comprise a plurality of segmented punching sheets which can be spliced and connected;
any one of the plurality of partitioned stampings comprises:
a tooth portion;
the yoke part is arranged on one side, away from the axis of the stator punching sheet, of the tooth part, and a groove body is arranged on one side, away from the tooth part, of the yoke part;
the number of pole pairs of the rotor is p, the maximum rotating speed of the rotor is n, the unit of n is rotation/second, p and n meet the requirement that n/p is more than 60 and less than or equal to 100.
2. The electric machine of claim 1, wherein any of the plurality of segmented laminations further comprises:
the first connecting part is arranged on one edge of the segmented punching sheet extending along the radial direction of the stator punching sheet;
the first connecting part of one segmented punching sheet can be connected with the second connecting part of the adjacent segmented punching sheet in a splicing manner; the first connecting portion is configured as a projection and the second connecting portion is configured as a recess adapted to the projection.
3. The electric machine of claim 1,
the number of teeth of the stator is Z, Z and n meet, and n/Z is more than 20 and less than or equal to 34.
4. The electric machine of claim 1,
the maximum rotating speed n of the rotor meets the requirement that n is more than 120 and less than or equal to 200.
5. The electric machine of claim 1,
the number of the segmented punching sheets in one stator punching sheet is M, the number of magnetic pole pairs of the rotor is N, wherein M and N meet the following conditions: 2/3, M is less than or equal to 6, N is less than or equal to 2.
6. The electric machine of claim 1, wherein the stator further comprises:
the avoiding notch is arranged on the surface, facing the rotor, of the tooth part, and the distance between the avoiding notch and a first tooth shoe of the tooth part is smaller than the distance between the avoiding notch and a second tooth shoe of the tooth part;
wherein, along the direction of rotation of the rotor, the rotor passes through the first tooth shoe and the second tooth shoe in order.
7. The electric machine of any of claims 1 to 6, wherein the stator further comprises:
and the aluminum coil is wound on the tooth part.
8. The electric machine according to any of claims 1 to 6,
the outer diameter of the stator punching sheet is R1, the inner diameter of the stator punching sheet is R2, and the relation between R1 and R2 satisfies: 0.57 is not less than R2/R1 is not less than 0.5.
9. The electric machine of any one of claims 1 to 6, further comprising:
and a plurality of flux guide grooves which are arranged on the rotor in a penetrating manner along the axial direction of the motor.
10. The electric machine according to any of claims 1 to 6,
rated torque of the motor is T1, the inner diameter of the stator punching sheet is R2, the unit volume torque of the rotor is T2, and the following requirements are met among T1, R2 and T2:
5.18×10-7≤T1×R2-3×T2-1≤1.17×10-6，
5kN·m·m-3≤T2≤45kN·m·m-3。
11. the electric machine according to any of claims 1 to 6,
the stator punching sheet is characterized in that the yoke is cut along the radial direction of the stator punching sheet, and the groove body passes through the central line of the section of the yoke.
12. The electric machine according to any of claims 1 to 6,
the tank body comprises a trapezoidal groove.
13. The electric machine of claim 12,
the other groove bodies except the trapezoid grooves in the plurality of groove bodies are rectangular.
14. A compressor, comprising:
the electric machine of any one of claims 1 to 13; and
and the motor is connected with the compression part.
15. An electrical device, comprising:
an apparatus main body; and
the compressor of claim 14, connected to the equipment body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123070619.4U CN216290376U (en) | 2021-12-08 | 2021-12-08 | Motor, compressor and electrical equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202123070619.4U CN216290376U (en) | 2021-12-08 | 2021-12-08 | Motor, compressor and electrical equipment |
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| CN216290376U true CN216290376U (en) | 2022-04-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114069907A (en) * | 2021-12-08 | 2022-02-18 | 安徽美芝精密制造有限公司 | Motor, compressor and electrical equipment |
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2021
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114069907A (en) * | 2021-12-08 | 2022-02-18 | 安徽美芝精密制造有限公司 | Motor, compressor and electrical equipment |
| CN114069907B (en) * | 2021-12-08 | 2024-06-28 | 安徽美芝精密制造有限公司 | Motor, compressor and electrical equipment |
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