CN114069907B - Motor, compressor and electrical equipment - Google Patents

Motor, compressor and electrical equipment Download PDF

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Publication number
CN114069907B
CN114069907B CN202111494414.0A CN202111494414A CN114069907B CN 114069907 B CN114069907 B CN 114069907B CN 202111494414 A CN202111494414 A CN 202111494414A CN 114069907 B CN114069907 B CN 114069907B
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CN
China
Prior art keywords
stator
rotor
motor
tooth
punching sheet
Prior art date
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Active
Application number
CN202111494414.0A
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Chinese (zh)
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CN114069907A (en
Inventor
徐飞
邱小华
程文
张肃
江波
郑立宇
丁云霞
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Anhui Meizhi Precision Manufacturing Co Ltd
Original Assignee
Anhui Meizhi Precision Manufacturing Co Ltd
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Publication date
Application filed by Anhui Meizhi Precision Manufacturing Co Ltd filed Critical Anhui Meizhi Precision Manufacturing Co Ltd
Priority to CN202111494414.0A priority Critical patent/CN114069907B/en
Publication of CN114069907A publication Critical patent/CN114069907A/en
Priority to PCT/CN2022/130792 priority patent/WO2023103696A1/en
Application granted granted Critical
Publication of CN114069907B publication Critical patent/CN114069907B/en
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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
    • H02K1/146—Stator cores with salient poles consisting of a generally annular yoke with salient poles
    • H02K1/148—Sectional cores
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/46—Fastening of windings on the stator or rotor structure
    • H02K3/52—Fastening salient pole windings or connections thereto
    • H02K3/521—Fastening salient pole windings or connections thereto applicable to stators only
    • H02K3/522—Fastening salient pole windings or connections thereto applicable to stators only for generally annular cores with salient poles
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
    • H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Abstract

The invention provides a motor, a compressor and electrical equipment, wherein the motor comprises: a stator assembly and a rotor, the stator assembly including a stator and a winding; the rotor is arranged in the stator; the stator includes: the stator punching sheets comprise a plurality of split punching sheets which can be connected in a split mode; the block punching sheet comprises: a tooth portion and a yoke portion; the pole pair number of the rotor is p, the maximum rotating speed of the rotor is n, p and n are satisfied, and n/p is more than 60 and less than or equal to 100. The stator is designed into a split splicing structure, winding of the coil is convenient to achieve, two adjacent block punching sheets can be installed after winding of the coil is completed, difficulty of winding of the coil is reduced, more coils can be wound under the condition that the size of the stator is the same, and output torque and motor efficiency of a motor can be improved.

Description

Motor, compressor and electrical equipment
Technical Field
The invention belongs to the technical field of motor equipment, and particularly relates to a motor, a compressor and electrical equipment.
Background
In the motor stator in the prior art, the number of turns of a 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 rate in the winding process, and in order to wind more turns of coils on the stator, the size of the stator needs to be increased, which results in a larger motor size, so how to increase the turns of the wound coils without increasing the motor size is a problem to be solved.
Disclosure of Invention
The present invention aims to solve one of the technical problems existing in the prior art or related technologies.
In view of this, the present invention proposes, in a first aspect, an electric machine comprising: the stator assembly comprises a stator and a winding wound on the stator; the rotor is arranged in the stator; the stator includes: the stator punching sheets comprise a plurality of split punching sheets which can be connected in a split manner; any one of the plurality of segmented chips comprises: a tooth portion; the yoke part is arranged at one side of the tooth part, which is away from the axis of the stator punching sheet, and a groove body is arranged at one side of the yoke part, which is away from the tooth part; the pole pair number of the rotor is p, the maximum rotating speed of the rotor is n, the unit of n is the rotation/second, and p and n are satisfied, and the n/p is more than 60 and less than or equal to 100.
The motor provided by the application comprises a stator assembly, wherein the stator assembly comprises a stator, a rotor and a winding wound on the stator.
Wherein, the stator is inside to be equipped with the stator groove, and the rotor sets up in the stator groove, concretely speaking, the stator sets up with the rotor is coaxial, and the rotor can rotate for the stator. Further, the stator is also provided with windings, in particular, the windings are arranged on the stator teeth. The stator comprises stator punching sheets which are arranged in a laminated mode, a plurality of tooth parts are arranged on the stator punching sheets, and the tooth parts of the stator punching sheets are arranged in a laminated mode to form a plurality of stator teeth. The stator teeth are arranged on the inner side of the stator and face the rotor. The winding is wound on the stator teeth, the winding is used for generating magnetic induction wires in an electrified state, and the rotor is equivalent to the rotor rotating relative to the winding in the rotating process of the rotor relative to the stator, so that the rotor cuts the magnetic induction wires, generates force for driving the rotor to rotate, and further realizes the operation of the motor.
The stator provided by the invention is of a split structure, and specifically comprises a plurality of stator punching sheets, wherein the plurality of stator punching sheets are stacked, the shape and the structure of each stator punching sheet are the same, and the plurality of stator punching sheets are stacked, so that the plurality of stator punching sheets jointly form a main body of the stator. Compared with the stator designed into an integral structure, the split stator formed by a plurality of stator punching sheets has the advantages that the processing difficulty is reduced, and the maintenance and the replacement are easier.
In order to further reduce the processing difficulty of the stator core and improve the slot filling rate of the motor, the stator punching sheet is also arranged to be of a split type structure. The stator punching sheet comprises a plurality of block punching sheets which are connected in a split way. The split connection between the block punching sheets is easy to split the block punching sheets in the stator independently, so that the product is easier to maintain, and the maintenance cost of the product is reduced.
One side of the yoke part, which is away from the tooth part, is provided with a groove body, namely, the periphery of the stator is provided with the groove body, and the groove body can increase the interval between the stator and other parts positioned on the periphery side of the stator, so that oil return of the compressor is facilitated, the smoothness of the oil return is improved, and the running stability of the compressor is facilitated to be improved.
In one possible design, the channel comprises a trapezoidal channel. The trapezoidal groove body is convenient to clamp with the tool, so that the tool can drive a plurality of block punching sheets to move. In the winding process, the plurality of block punching sheets are distributed in a straight line, and after the winding is completed, the tooling drives the plurality of block punching sheets to enclose to form the stator punching sheets. The groove body is arranged to be the trapezoid groove, so that convenience in that the tooling drives the block punching sheet to move can be improved.
In one possible application, the other of the plurality of slots, except for the trapezoidal slot, is rectangular. Through setting at least one cell body to rectangular channel, rectangular channel can regard as the discernment groove, can realize the location to the motor through the discernment groove to be convenient for assemble to the compressor to the motor.
In one possible application, the yoke is taken radially of the stator laminations, and the slot passes through the centerline of the cross section of the yoke.
The groove body passes through the center line of the yoke part, so that the oil return effect can be further improved, the smoothness of oil return is improved, and the running stability of the compressor is improved.
The pole pair numbers of the rotor are related to the torque of the motor, but the number range of the pole pair numbers is simply limited to adjust the torque, so that the displacement of the compressor provided with the motor is difficult to reach the standard required by operation. The larger the rotation speed of the rotor is, the larger the displacement of the compressor is, the larger the pole pair number is, and the lower the maximum rotation speed of the rotor is, therefore, the maximum rotation speed of the rotor is related to the pole pair number of the rotor, the ratio of the maximum rotation speed of the rotor to the pole pair number 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, the stator in the technical scheme provided by the invention can also have the following additional technical characteristics:
In one possible design, any one of the plurality of segmented chips further comprises: the first connecting part is arranged at one edge of the segmented punching sheet extending along the radial direction of the stator punching sheet; the second connecting part is arranged at the other edge of the radial extension of the stator punching sheet, and 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 way; the first connecting portion is configured as a protruding member and the second connecting portion is configured as a recess adapted to the protruding member.
In this design, specifically, in order to achieve the connection between the segmented punched pieces, a first connection portion and a second connection portion are further provided on the segmented stator. Specifically, the first connecting portion is disposed at one edge of the yoke portion extending along the radial direction of the stator punching sheet, and the second connecting portion is disposed at the other edge of the yoke portion extending along the radial direction of the stator punching sheet, that is, the first connecting portion and the second connecting portion are disposed at two sides of the block punching sheet along the circumferential direction of the stator punching sheet. The first connecting part of one segmented punching sheet is matched with the second connecting part of the adjacent other segmented punching sheet, so that the connection of the two segmented punching sheets is realized. The plurality of block punching sheets are arranged along the circumferential direction of the stator, and any two adjacent block punching sheets are matched through the first connecting part and the second connecting part, so that the connection among the plurality of block punching sheets is realized, and the stator punching sheets are formed by surrounding.
The first connecting part and the second connecting part can be mutually separated, and two adjacent block punching sheets are mutually separated under the state that the first connecting part and the second connecting part are separated, so that the stator punching sheets are decomposed. It can be appreciated that the stator is in the course of the work, and the phenomenon that a certain piece of piecemeal towards piece damage probably appears, can be through separating first connecting portion and second connecting portion this moment to take out broken piece towards the piece from the stator towards piece, only change the maintenance to broken piece towards piece alone, and need not to wholly change the stator towards piece, reduced maintenance cost.
The first connecting part and the second connecting part can be connected with each other and separated from each other, so that the split connection between the split blocks is realized, the split blocks in the stator are easy to separate, the product is easier to maintain, and the product maintenance cost is reduced.
Through setting up the piecewise towards the piece into the structure that can splice each other and connect to when processing the stator towards the piece, only process a plurality of piecewise towards the piece can, assemble into the stator towards the piece with a plurality of piecewise towards the piece part again, compare in processing a complete stator towards the piece, the degree of difficulty of processing the piecewise towards the piece part reduces, thereby reduced manufacturing cost, this kind of stator simple structure, the automated production to the stator is realized to accessible automated production line, and design the stator into split type mosaic structure, be convenient for realize the winding of coil, can be around installing two adjacent piecewise towards the piece again after the completion of winding of coil, reduce the degree of difficulty around establishing the coil, therefore can be under the same circumstances of stator size, the winding of winding more coils is established, improve the number of turns of winding of coil, be favorable to improving the groove filling rate of motor. On the basis of not increasing 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 is constructed as the protrusion piece, and the second connecting portion is constructed as the recess, namely is unsmooth matched with structure between first connecting portion and the second connecting portion, recess and protrusion looks adaptation, realizes the connection cooperation of first connecting portion and second connecting portion.
Through setting up first connecting portion into protruding piece, set up the second connecting portion into with protruding piece 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 laminations include teeth and yokes, wherein the yokes are coupled to the teeth. In the state that a plurality of segmented stators are spliced into stator punching sheets, the yoke part is arranged on one side close to the outer edge of the stator punching sheets, and the tooth part is arranged on one side close to the inner edge of the stator punching sheets.
Further, the first connecting part is arranged at one edge of the yoke part extending along the radial direction of the stator punching sheet; the second connecting portion is arranged at the other edge of the yoke portion extending along the radial direction of the stator punching sheet. The first connecting part and the second connecting part are respectively arranged on two edges of the yoke part extending along the radial direction of the stator punching sheet, so that two arbitrarily connected partitioned punching sheets in the partitioned punching sheets are connected with each other, and then the stator punching sheet is formed by surrounding. The first connecting part and the second connecting part can be connected with each other and separated from each other, so that the split connection between the split punching sheets is realized, the split punching sheets in the stator are easy to split independently, the product is easier to maintain, and the maintenance cost of the product is reduced.
In one possible design, the number of teeth of the stator is Z, Z and n are satisfied, 20 < n/Z.ltoreq.34.
In this design, the maximum motor rotation speed affects the torque of the motor, but simply limiting the maximum motor rotation speed is free from the limit of the number of teeth of the stator, and the harmonic magnetic field of the motor is easily changed to affect the efficiency of the motor. Therefore, the number of teeth of the stator and the maximum rotation speed of the rotor are combined, the torque can be reduced under the condition of the same displacement, the running rotation 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.ltoreq.200.
In this design, the maximum rotation speed of the rotor is limited to this range, and the operation stability of the motor can be ensured.
In one possible design, the stator further comprises: the avoidance notch is arranged on the surface of the tooth part, which is used for facing the rotor, and the distance between the avoidance notch and the first tooth shoe of the tooth part is smaller than the distance between the avoidance notch and the second tooth shoe of the tooth part; wherein, along the rotation direction of rotor, the rotor passes through first tooth boots and second tooth boots in proper order.
In this technical scheme, the stator still includes dodging the breach, dodges the breach setting in the tooth and be used for towards the surface of rotor. The tooth portion includes a first tooth shoe and a second tooth shoe, and the rotor passes through the first tooth shoe and the second tooth shoe in order along the rotation direction of the rotor. The distance between the avoidance gap and the first tooth shoe is smaller than the distance between the avoidance gap and the second tooth shoe, namely, the avoidance gap is close to one side of the first tooth shoe.
Through set up on the tooth towards the surface of rotor and dodge the breach to can dodge the protruding piece on the rotor through dodging the breach at stator and the in-process of rotor assembly, avoid the assembly interference.
In one possible design, the stator further comprises: an aluminum coil is wound around the teeth.
In this design, the coil wound around the tooth is defined as a material of aluminum, that is, the coil is formed by winding aluminum wire around the tooth, and the unit price of aluminum wire is low.
In one possible design, the stator laminations have an outer diameter R1 and an inner diameter R2, the relationship between R1 and R2 being: 0.57 More than or equal to R2/R1 is more than or equal to 0.5.
In this design, the relationship between the outer diameter and the inner diameter of the stator laminations is further defined. It will be appreciated that the ratio between the inner diameter of the stator laminations and the outer diameter of the stator laminations has a certain effect on the performance of the motor, in particular on the heat dissipation, the magnetic flux density and the overall weight of the motor, and in order to balance the various parameters of the motor, the motor has a high cost performance, and the ratio between the inner diameter of the stator laminations and the outer diameter of the stator laminations is limited within a certain range.
Specifically, the outer diameter of the stator lamination is R1, the inner diameter of the stator lamination is R2, and the relationship between R1 and R2 satisfies: 0.57 More than or equal to R2/R1 is more than or equal to 0.5.
The outer diameter of the stator lamination may be 101.15mm and the inner diameter of the stator lamination may be 53.3mm.
The ratio of the inner diameter of the stator punching sheet to the outer diameter of the stator punching sheet is more than or equal to 0.5 and less than or equal to 0.57 by limiting the ratio range between the inner diameter of the stator punching sheet and the outer diameter of the stator punching sheet, so that 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 the circle passing through the outermost contour of the rotor is set as a contour circle, that is, the contour circle of the radial section of the rotor passes through the point or line of the radial section of the rotor furthest from the center of the circle, and the contour circle passes through the axis of the rotor, and if the radial section of the rotor is a regular circle, the contour circle coincides with the outer edge of the radial section of the rotor.
Further, the outer contour of the rotor may be circular. It can be understood that in the working process of the motor, the rotor is in a rotating state, the outer contour of the rotor is set to be round, 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 motor further comprises: the plurality of 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 rotor punching sheet, and the magnetic flux guide grooves are distributed on the rotor punching sheet in a penetrating manner along the axial direction of the motor, namely in the rotor punching sheet in the penetrating manner along the axial direction of the motor. It will be appreciated that during operation of the motor, radial electromagnetic waves may be generated which may lead to 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 way along the axial direction of the motor, so that radial electromagnetic waves of the lowest order of the motor can be reduced, and the noise caused by the radial electromagnetic waves can be reduced.
By arranging a plurality of magnetic flux guide grooves on the rotor and enabling the magnetic flux guide grooves to be distributed on the rotor in a penetrating manner along the axial direction of the motor, the radial electromagnetic wave of the lowest order of the motor can be reduced, and noise caused by the radial electromagnetic wave can be 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 torque per unit volume of the rotor is T2, wherein the torque per unit volume of the rotor is T2, and the torque between T1, R2 and T2 is satisfied ：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 variable among the rated torque of the motor, the inner diameter of the stator lamination, and the torque per unit volume of the rotor is defined. It can be understood that the output torque of the motor is influenced by the combined variable among the rated torque of the motor, the inner diameter of the stator punching sheet and the unit volume torque of the rotor, and 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, rated torque of the motor is T1, inner diameter of the stator punching sheet is R2, unit volume torque of the rotor is T2, and 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 output torque of the motor can be made to satisfy the requirements of the equipment in which the motor is installed by defining 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 of 5.18×10 -7 or more and 1.17×10 -6 or less, and defining the unit-volume torque of the rotor of 5kn·m -3 or more and 45kn·m -3 or less.
In a second aspect, the present invention proposes a compressor comprising: as in any of the first aspects
A motor in the meter; and the compressing component is connected with the motor.
In a third aspect, the present invention proposes an electrical device comprising: an apparatus main body; and a compressor of the second aspect, the compressor being connected to the apparatus body.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the invention 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 shows a schematic structural view of a segmented blank of one embodiment of the present invention;
FIG. 2 illustrates a schematic structural view of a stator lamination of one embodiment of the present invention;
FIG. 3 shows a schematic structural view of a rotor sheet according to an embodiment of the present invention;
fig. 4 shows a schematic structural view of a compressor according to another embodiment of the present invention.
The correspondence between the reference numerals and the component names in fig. 1 to 4 is:
100 stators, 110 segmented punching sheets, 111 tooth parts, 1111 first tooth shoes, 1112 second tooth shoes, 112 yoke parts, 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-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 invention, but the present invention may be practiced in other ways than those described herein, and therefore the scope of the present invention is not limited to the specific embodiments disclosed below.
A motor, a compressor, and an electric device provided according to some embodiments of the present invention are described below with reference to fig. 1 to 4.
As shown in connection with fig. 1 and 2, in some embodiments of the present invention, there is provided an electric machine including: a stator assembly including a stator 100 and windings wound on the stator 100, and a rotor 200; the rotor 200 is disposed within the stator 100; the stator 100 includes: a plurality of stator laminations 120 arranged in a stacked manner, the stator laminations 120 including a plurality of split-connectable segmented laminations 110; any one of the plurality of segmented chips 110 includes: the stator punching sheet comprises a tooth part, a yoke part, a first connecting part and a second connecting part, wherein the yoke part 112 is arranged on one side of the tooth part 111, which is away from the axis of the stator punching sheet 120, and a groove body 121 is arranged on one side of the yoke part 112, which is away from the tooth part 111. The first connecting portion 113 is disposed at an edge of the segmented lamination 110 extending along the radial direction of the stator lamination 120; the second connecting portion 114 is disposed at the other edge of the radial extension of the stator lamination 120, and the first connecting portion 113 of one segmented lamination 110 can be connected with the second connecting portion 114 of the adjacent segmented lamination 110 in a joggable manner; the first connection portion 113 is configured as a protrusion, and the second connection portion 114 is configured as a groove adapted to the protrusion; the pole pair number of the rotor 200 is p, the maximum rotation speed of the rotor 200 is n, and p and n are satisfied, and 60 < n/p is less than or equal to 100.
The motor provided in this embodiment includes a stator assembly including a stator 100, a rotor 200, and windings wound on the stator 100.
Wherein, a stator slot is provided inside the stator 100, and the rotor 200 is disposed in the stator slot, specifically, the stator 100 and the rotor 200 are coaxially disposed, and the rotor 200 can rotate relative to the stator 100. Further, windings are also provided on the stator 100, specifically on the stator teeth. The stator 100 includes stator laminations 120 stacked together, the stator laminations 120 having a plurality of teeth 111, the teeth 111 of the plurality of stator laminations 120 being stacked together to form a plurality of stator teeth. The stator teeth are provided on the inner side of the stator 100 toward the rotor 200. The windings are wound on the stator teeth, and the windings are used for generating magnetic induction wires in an energized state, so that the rotor 200 cuts the magnetic induction wires in the rotating process relative to the stator 100, namely, the rotor 200 rotating relative to the windings rotates, and a force for driving the rotor 200 to rotate is generated, and the operation of the motor is further realized.
The stator 100 provided in this embodiment is of a split structure, specifically, the stator 100 includes a plurality of stator laminations 120, the plurality of stator laminations 120 are stacked, the shape and 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 together form the main body of the stator 100. Compared with the stator 100 designed into a whole structure, the split stator 100 formed by a plurality of stator punching sheets 120 has the advantages of reduced processing difficulty and easier maintenance and replacement.
In order to further reduce the processing difficulty of the stator 100 core and improve the slot filling rate of the motor, the stator punching sheet 120 is also provided as a split structure. The stator lamination 120 includes a plurality of segmented laminations 110, and the plurality of segmented laminations 110 are connected in a split manner. Specifically, in order to achieve the connection between the segmented chips 110, a first connection portion 113 and a second connection portion 114 are further provided on the segmented stator 100. Specifically, the first connection portion 113 is disposed at one edge of the yoke portion 112 extending along the radial direction of the stator lamination 120, and the second connection portion 114 is disposed at the other edge of the yoke portion 112 extending along the radial direction of the stator lamination 120, that is, the first connection portion 113 and the second connection portion 114 are disposed at two sides of the segmented lamination 110 along the circumferential direction of the stator lamination 120. The first connection portion 113 of one divided punch 110 is mated with the second connection portion 114 of the adjacent other divided punch 110, thereby achieving connection of the two divided punches 110. The plurality of segmented punched pieces 110 are arranged along the circumferential direction of the stator 100, and any two adjacent segmented punched pieces 110 are matched through the first connecting part 113 and the second connecting part 114, so that the plurality of segmented punched pieces 110 are connected, and the stator punched pieces 120 are formed in a surrounding manner.
The first connecting portion 113 and the second connecting portion 114 may be separated from each other, and two adjacent divided punched pieces 110 are separated from each other in a state where the first connecting portion 113 and the second connecting portion 114 are separated from each other, thereby achieving the disassembly of the stator punched piece 120. It can be appreciated that during the operation of the stator 100, a damage phenomenon of a certain piece of the segmented lamination 110 may occur, and at this time, the damaged piece of the segmented lamination 110 may be taken out from the stator lamination 120 by separating the first connecting portion 113 from the second connecting portion 114, so that only the damaged piece of the segmented lamination 110 is replaced and maintained individually, without replacing the stator lamination 120 integrally, thereby reducing maintenance cost.
The first connecting part 113 and the second connecting part 114 can be connected with each other or separated from each other, so that the split connection between the split blocks is realized, the split block punching sheet 110 in the stator 100 is easy to split independently, the product is easier to maintain, and the maintenance cost of the product is reduced.
Through setting up the piecewise towards piece 110 as the structure that can splice each other and connect to when processing stator towards piece 120, only processing a plurality of piecewise towards piece 110 can, again with a plurality of piecewise towards piece 110 part assembly stator towards piece 120, compare in processing a complete stator towards piece 120, the degree of difficulty of processing piecewise towards piece 110 part reduces, thereby manufacturing cost has been reduced, this kind of stator 100 simple structure, the automated production to stator 100 is realized to the accessible automated production line, and, design stator 100 into split type mosaic structure, be convenient for realize the winding of coil, can be around setting up the back again to two adjacent piecewise towards piece 110 after completing the coil, reduce the degree of difficulty of winding up the coil, therefore can be under the same circumstances of stator 100 size, around setting up more coils, improve the winding of coil, be favorable to improving the groove full rate of motor. On the basis of not increasing 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 matched with the protrusion, so that connection fit between the first connecting portion 113 and the second connecting portion 114 is realized.
Through setting the first connecting portion 113 as the protruding member, set up the second connecting portion 114 as the recess with protruding member matched with, made between first connecting portion 113 and the second connecting portion 114 formed unsmooth matched with structure, promoted the connection reliability, reduced the processing degree of difficulty.
The segmented stator lamination 120 includes a tooth 111 and a yoke 112, wherein the yoke 112 is connected to the tooth 111. In a state where a plurality of segmented stators 100 are spliced into the stator lamination 120, the yoke 112 is disposed on a side near the outer edge of the stator lamination 120, and the tooth 111 is disposed on a side near the inner edge of the stator lamination 120.
Further, the first connecting portion 113 is disposed at an edge of the yoke portion 112 extending along the radial direction of the stator lamination 120; the second connecting portion 114 is disposed at the other edge of the yoke portion 112 extending radially along the stator lamination 120. By providing the first connecting portion 113 and the second connecting portion 114 on two edges of the yoke portion 112 extending in the radial direction of the stator lamination 120, two arbitrarily connected segmented laminations 110 of the plurality of segmented laminations 110 are connected to each other, and thus the stator lamination 120 is formed by surrounding. 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 split blocks is realized, the split block punching sheet 110 in the stator 100 is easy to split independently, the product is easier to maintain, and the maintenance cost of the product is reduced.
The groove body 121 is arranged on one side, away from the tooth portion 111, of the yoke portion 112, namely, the groove body 121 is formed in the periphery of the stator 100, and the groove body 121 can increase the distance between the stator 100 and other components located on the periphery side of the stator 100, so that oil return of the compressor 300 is facilitated, smoothness of oil return is improved, and running stability of the compressor 300 is facilitated.
In one possible embodiment, the channel 121 comprises a trapezoidal channel. The trapezoidal groove 121 is convenient to be clamped with the tooling, so that the tooling can drive the plurality of block punching sheets 110 to move. In the winding process, the plurality of segmented punched sheets 110 are distributed in a straight line, and after the winding is completed, the tooling drives the plurality of segmented punched sheets 110 to enclose to form the stator punched sheet 120. Setting the slot 121 as a trapezoidal slot can improve the convenience of the tooling to drive the segmented stamping 110 to move.
In one possible application, the other slots 121 of the plurality of slots 121, except for the trapezoidal slots, are rectangular. By arranging at least one of the groove bodies 121 as a rectangular groove, the rectangular groove can be used as an identification groove, and positioning of the motor can be achieved through the identification groove, so that assembly of the motor to the compressor is facilitated.
In one possible application, the yoke 112 is taken along a radial direction of the stator plate 120, and the slot 121 passes through a center line of a cross section of the yoke 112.
The groove 121 passes through the center line of the yoke 112, thereby further improving the oil return effect, improving the smoothness of oil return, and being beneficial to improving the operation stability of the compressor 300.
The pole pair numbers of the rotor 200 are associated with the torque of the motor, but simply limiting the number range of pole pairs to adjust the torque easily results in difficulty in achieving the required standard of operation of the compressor 300 to which the motor is mounted. The greater the rotation speed of the rotor 200, the greater the displacement of the compressor 300, and the greater the pole pair number, the lower the maximum rotation speed of the rotor 200, therefore, the maximum rotation speed of the rotor 200 is associated with the pole pair number of the rotor 200, and the ratio of the maximum rotation speed of the rotor 200 to the pole pair number of the rotor 200 is limited between 60 and 100, so that the torque can be reduced under the condition of the same displacement, the operating point of the motor can be changed, and the efficiency of the motor can be improved.
In one possible embodiment, the stator 100 has a number of teeth Z, Z and n, with 20 < n/Z.ltoreq.34.
In this embodiment, the maximum motor rotation speed affects the torque of the motor, but simply limiting the maximum motor rotation speed to be out of the limit of the number of teeth of the stator 100 easily causes a change in the harmonic magnetic field of the motor to affect the efficiency of the motor. Therefore, the number of teeth of the stator 100 and the maximum rotation speed of the rotor 200 are combined, so that the torque can be reduced under the condition of the same displacement, the running rotation speed of the motor is improved, 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.ltoreq.200.
In this embodiment, the maximum rotation speed of the rotor 200 is limited to this range, and the operation stability of the motor can be ensured.
As shown in connection with fig. 2,3 and 4, in one possible embodiment, the stator 100 further comprises: an avoidance gap 122, the avoidance gap 122 is disposed on the surface of the tooth 111 facing the rotor 200, and the distance between the avoidance gap 122 and the first tooth shoe 1111 of the tooth 111 is smaller than the distance between the avoidance gap 122 and the second tooth shoe 1112 of the tooth 111; wherein the rotor 200 passes through the first tooth shoe 1111 and the second tooth shoe 1112 in sequence in the rotation direction of the rotor 200.
In this design, the stator 100 further includes a relief notch 122, and the relief notch 122 is provided on the surface of the tooth 111 facing the rotor 200. The tooth 111 includes a first tooth shoe 1111 and a second tooth shoe 1112, and the rotor 200 passes through the first tooth shoe 1111 and the second tooth shoe 1112 in this order in the rotational direction of the rotor 200. The distance between the relief notch 122 and the first tooth shoe 1111 is smaller than the distance between the relief notch 122 and the second tooth shoe 1112, i.e., the relief notch 122 is closer to the first tooth shoe 1111.
By providing the avoidance notch 122 on the surface of the tooth portion 111 facing the rotor 200, the protruding member on the rotor can be avoided through the avoidance notch 122 in the process of assembling the stator 100 and the rotor 200, and assembly interference is avoided.
In one possible embodiment, the stator 100 further includes: aluminum coils wound around the teeth 111.
In this embodiment, the coil wound around the tooth 111 is made of aluminum, that is, the coil is formed by winding aluminum wire around the tooth 111, the unit price of aluminum wire is low, and the use of aluminum wire as the coil can reduce the material cost of the motor in large part.
As shown in connection with fig. 1 and 2, in one 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 More than or equal to R2/R1 is more than or equal to 0.5.
In this embodiment, the relationship between the outer diameter and the inner diameter of the stator laminations 120 is further defined. It will be appreciated that the ratio between the inner diameter of the stator laminations 120 and the outer diameter of the stator laminations 120 has an effect on the performance of the motor, and in particular, on the heat dissipation, the magnetic flux density and the overall weight of the motor, and in order to balance the various parameters of the motor, to provide a high cost performance of the motor, the ratio between the inner diameter of the stator laminations 120 and the outer diameter of the stator laminations 120 is limited to 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 More than or equal to R2/R1 is more than or equal to 0.5.
The outer diameter of the stator laminations 120 can be 101.15mm and the inner diameter of the stator laminations 120 can be 53.3mm.
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 higher cost performance.
As shown in connection with fig. 2,3 and 4, in one possible embodiment, the rotor 200 is taken in the radial direction of the rotor 200, the outer contour of the cross section of the rotor 200 being circular.
In this embodiment, the rotor 200 is taken along the radial direction of the rotor 200, and the cross section of the rotor 200 in the radial direction may 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, that is, a point or line where the contour circle of the radial section of the rotor 200 passes through the center of the circle farthest from the radial section of the rotor 200, and the contour circle passes through the axis of the rotor 200, and if the radial section of the rotor 200 is a regular circle, the contour circle coincides with the outer edge of the radial section of the rotor 200.
Further, the outer profile of the rotor 200 may be circular. It can be appreciated 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 magnetic flux guide grooves penetrate through the rotor 200 in the axial direction of the motor.
In this embodiment, a plurality of flux guide slots are also provided on the rotor 200. Specifically, the rotor 200 is formed by stacking a plurality of rotor punching sheets 210, and a plurality of magnetic flux guiding grooves are disposed on any rotor punching sheet 210, and the magnetic flux guiding grooves are distributed on the rotor punching sheet 210 in a penetrating manner along the axial direction of the motor, that is, are distributed on the rotor punching sheet 210 in a penetrating manner along the axial direction of the motor. It will be appreciated that during operation of the motor, radial electromagnetic waves may be generated which may lead to increased noise. In order to improve noise of the motor, a plurality of magnetic flux guide grooves are formed in the rotor 200 in the axial direction of the motor, so that radial electromagnetic waves of the lowest order of the motor can be reduced, and noise caused by the radial electromagnetic waves can be reduced.
By providing a plurality of magnetic flux guide grooves in the rotor 200 and allowing the magnetic flux guide grooves to pass through and be distributed in the rotor 200 in the axial direction of the motor, the radial electromagnetic wave of the lowest order of the motor can be reduced, and noise caused by the radial electromagnetic wave can be reduced.
The rotor punching sheet 210 is provided with a first magnetic steel groove 211 and a second magnetic steel groove 212, and the first magnetic steel groove 211 and the second magnetic steel groove 212 can be respectively filled with magnetic steel 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:
5.18×10-7≤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 combination variable 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. As will be appreciated, the combined variable among the rated torque of the motor, the inner diameter of the stator laminations 120 and the unit volume torque of the rotor 200 affects the output torque of the motor, and by limiting the range of the combined variable, the output torque of the motor can be made to meet the requirements of the equipment in which the motor is installed.
Specifically, 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:
5.18×10-7≤T1×R2-3×T2-1≤1.17×10-6，
5kN·m·m-3≤T2≤45kN·m·m-3。
by defining the combination 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 to be 5.18×10 -7 or more and 1.17×10 -6 or less, and defining the unit volume torque of the rotor 200 to be 5kn·m· -3 or more and 45kn·m·m -3 or less, the output torque of the motor can be made to satisfy the requirements of the equipment to which the motor is provided.
As shown in fig. 4, in an embodiment of the present invention, there is provided a compressor 300, the compressor 300 including: a motor and compression member 310 in any of the possible embodiments described above, the motor being coupled to the compression member 310.
Specifically, the compression part 310 includes a cylinder 311 and a piston 312, and in order to enable a motor to be connected with the compression part 310 and drive the compression part 310 to operate, some connectors 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 with 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 play a supporting and limiting role on the crankshaft 320, so that the crankshaft 320 can normally rotate.
The compressor 300 according to the present application includes the motor according to the above embodiment, and thus the compressor 300 has all the advantages of the motor according to the above embodiment.
In an embodiment of the present invention, an electrical apparatus is provided, including: the apparatus main body and the compressor in the above embodiments, the compressor is connected to the apparatus main body.
The electric equipment provided by the invention comprises the equipment main body and the compressor, wherein the compressor is connected with the equipment main body, and the compressor and the equipment main body are operated together in a matched mode when the electric equipment runs so as to enable the electric 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," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; "coupled" may be directly coupled or indirectly coupled through intermediaries. The specific meaning of the above terms in the present invention 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 invention. 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 description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (12)

1. An electric machine, comprising:
a stator assembly including 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 split punching sheets which can be connected in a split mode;
any one of the plurality of segmented chips comprises:
a tooth portion;
The yoke part is arranged on one side of the tooth part, which is away from the axis of the stator punching sheet, and a groove body is arranged on one side of the yoke part, which is away from the tooth part;
the pole pair number of the rotor is p, the maximum rotating speed of the rotor is n, the unit of n is rotation/second, p and n are satisfied, and n/p is more than 60 and less than or equal to 100;
Any one of the plurality of segmented chips further comprises:
the first connecting part is arranged at one edge of the segmented punching sheet extending along the radial direction of the stator punching sheet;
The second connecting part is arranged at the other edge of the radial extension of the stator punching sheet, and 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 split manner; the first connecting portion is configured as a protruding member, and the second connecting portion is configured as a groove adapted to the protruding member;
The stator further includes:
the avoidance notch is arranged on the surface of the tooth part, which is used for facing the rotor, and the distance between the avoidance notch and the first tooth shoe of the tooth part is smaller than the distance between the avoidance notch and the 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.
2. An electric machine according to claim 1, characterized in that,
The number of teeth of the stator is Z, Z and n are satisfied, and n/Z is more than 20 and less than or equal to 34.
3. An electric machine according to claim 1, characterized in that,
The maximum rotation speed n of the rotor is more than 120 and less than or equal to 200.
4. A motor according to any one of claims 1 to 3, wherein the stator further comprises:
and an aluminum coil wound around the tooth portion.
5. An electric machine according to any one of claims 1 to 3, characterized in that,
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 the following conditions: 0.57 More than or equal to R2/R1 is more than or equal to 0.5.
6. A motor according to any one of claims 1 to 3, characterized in that the motor further comprises:
The plurality of magnetic flux guide grooves penetrate through the rotor along the axial direction of the motor.
7. An electric machine according to any one of claims 1 to 3, characterized in that,
Rated torque of the motor is T1, inner diameter of the stator punching sheet is R2, unit volume torque of the rotor is T2, and the torque among T1, R2 and T2 satisfies the following conditions:
5.18×10-7≤T1×R2-3×T2-1≤1.17×10-6，
5kN•m•m-3≤T2≤45kN•m•m-3。
8. An electric machine according to any one of claims 1 to 3, characterized in that,
The yoke part is cut along the radial direction of the stator punching sheet, and the groove body passes through the center line of the section of the yoke part.
9. An electric machine according to any one of claims 1 to 3, characterized in that,
The tank body comprises a trapezoid tank.
10. The motor of claim 9, wherein the motor is configured to control the motor to drive the motor,
The other groove bodies except the trapezoid groove in the groove bodies are rectangular.
11. A compressor, comprising:
the motor of any one of claims 1 to 10; and
And the motor is connected with the compression part.
12. An electrical device, comprising:
An apparatus main body; and
The compressor of claim 11, wherein said compressor is coupled to said apparatus body.
CN202111494414.0A 2021-12-08 2021-12-08 Motor, compressor and electrical equipment Active CN114069907B (en)

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