Stator core and stator winding
By setting large-area first slots and small-area second slots alternately on the stator core and optimizing the winding structure, the problem of low efficiency of single-phase asynchronous motors is solved, and motor efficiency is improved and noise is reduced without changing the motor size.
Patent Information
- Application Number
- CN202520113615.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-17
- Publication Date
- 2026-01-02
- Estimated Expiration
- 2035-01-17
AI Technical Summary
Existing single-phase asynchronous motors have low efficiency, and it is difficult to improve their efficiency without changing their size.
Design a stator core by alternating between a larger first slot and a smaller second slot on the stator laminations and optimizing the winding structure to ensure that the number of turns and wire diameter of the main phase winding and the auxiliary phase winding meet a specific relationship, thereby increasing the winding wire diameter while maintaining the slot fill factor.
By optimizing the winding structure with respect to the slot area of the stator core without altering the overall size of the motor, it is possible to improve motor efficiency and reduce noise without changing the overall size of the motor.
Smart Images
Figure CN223758045U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to motor technical field especially relates to a stator core and stator winding. BACKGROUND
[0002] At present, single-phase asynchronous motor is widely used in household appliance field, but with the advance of national energy-saving and emission-reducing policy, the disadvantage of single-phase asynchronous motor's low efficiency is more and more obvious.
[0003] The volume size of motor is generally fixed size, and how to improve the motor efficiency on the basis of not changing the volume of motor becomes a problem to be solved. CONTENT
[0004] The utility model discloses a stator core to solve the problem pointed out in the background.
[0005] In order to realize the above-mentioned purpose, the utility model adopts the following technical scheme:
[0006] A stator core, comprising stator punching sheet, the stator punching sheet includes yoke, a plurality of tooth parts in the inner ring of yoke, there is a slot between every two adjacent tooth parts, a plurality of slot includes a plurality of first slot, a plurality of second slot, the area of first slot is greater than the area of second slot, first slot and second slot are alternately distributed, the opening width of first slot is equal to the opening width of second slot, each tooth part corresponds to shoe part, and the width of each shoe part is equal.
[0007] The stator core includes a plurality of stator punching sheets, and the plurality of stator punching sheets are stacked along the axial direction thereof.
[0008] And / or the yoke is a ring structure, and the outer periphery of the ring structure is circular or polygonal.
[0009] The included angle between the center lines of any two adjacent slot is equal.
[0010] The distance between the line connecting the side of first slot to the midpoint of tooth shoe and the center of stator punching sheet is defined as L1, and the distance between the line connecting the side of second slot to the midpoint of tooth shoe and the center of stator punching sheet is defined as L2, and L1
[0011] And / or the slot depth of first slot is defined as D1, and the slot depth of second slot is defined as D2, and D1>D2.
[0012] And / or the radius of the arc at the bottom of first slot is defined as R1, and the radius of the arc at the bottom of second slot is defined as R2, and R1>R2.
[0013] 0.5*L2
[0014] and / or 1.1*D2 < D1 < 1.5*D2;
[0015] and / or defining the distance of the first slot bottom circular arc radius R1 to the outer polygon of the yoke part closest to it as H1, the distance of the second slot bottom circular arc radius R2 to the outer polygon of the yoke part closest to it as H2, and H1 ≤ H2.
[0016] Each two adjacent first slots have two second slots, the boot part between adjacent first and second slots is an asymmetric structure, and the boot part between adjacent two second slots is a symmetric structure.
[0017] A stator core, the stator winding is a distributed winding structure, the stator winding comprises a main phase winding M and an auxiliary phase winding A, the main phase winding M and the auxiliary phase winding A are arranged at an electrical angle of 180 degrees.
[0018] Defining the number of turns of the main phase winding M as N1, the number of turns of the auxiliary phase winding A as N2, and N1 ≥ N2;
[0019] and / or defining the wire diameter of the main phase winding M as Φ1, the wire diameter of the auxiliary phase winding A as Φ2, and Φ1 ≥ Φ2.
[0020] Defining the main phase winding M as M1 and M2, and the auxiliary phase winding A as A1 and A2, wherein M1 and A1 are respectively arranged in a separate corresponding second slot, and M2 and A2 are commonly arranged in a corresponding first slot.
[0021] The number of first slots is 8, and the number of second slots is 16, wherein the span of M1 is 1-6, 7-12, 13-18 and 19-24 slots, the span of A1 is 4-9, 10-15, 16-21 and 22-3 slots, the span of M2 is 2-5, 8-11, 14-17 and 20-23 slots, and the span of A2 is 5-8, 11-14, 17-20 and 23-2 slots.
[0022] The utility model provides a kind of stator core, and beneficial effect is in at the premise of not changing motor appearance volume, the area of first slot is greater than the area of second slot, improve the total slot area of motor stator, to further in the case where not changing slot fullness, it can increase winding wire diameter, to be able to reach the purpose of improving motor efficiency. BRIEF DESCRIPTION OF DRAWINGS
[0023] Figure 1 It is the stator lamination diagram of the utility model figure;
[0024] Figure 2 It is the distribution and connection diagram of the winding of the utility model;
[0025] Figure 3Fig. 2 is a schematic diagram of the variation of motor efficiency with L1 / L2;
[0026] Figure 4 Fig. 3 is a schematic diagram of the variation of motor efficiency with D1 / D2;
[0027] Figure 5 Fig. 4 is a comparison chart of the noise of the motor before and after improvement.
[0028] In the figure: yoke part 1, tooth part 2, shoe part 3, first slot 4, second slot 5. DETAILED DESCRIPTION
[0029] The technical solutions in the embodiments of the utility model will be apparently and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments.
[0030] Referring to Figures 1-5 A stator core comprises stator laminations, the stator laminations comprise a yoke part 1 and a plurality of tooth parts 2 located in the inner circle of the yoke part 1, each two adjacent tooth parts 2 have a slot part, the plurality of slot parts comprise a plurality of first slots 4 and a plurality of second slots 5, the area of the first slots 4 is greater than the area of the second slots 5, the first slots 4 and the second slots 5 are alternately distributed, the opening width of the first slots 4 is equal to the opening width of the second slots 5, each tooth part 2 corresponds to a shoe part 3, and the width of each shoe part 3 is equal.
[0031] The device improves the total slot area of the motor stator by making the area of the first slots 4 greater than the area of the second slots 5 without changing the volume of the motor shape, and thus can increase the winding wire diameter without changing the slot fill rate, so as to achieve the purpose of improving the motor efficiency.
[0032] As an implementation manner, the stator core comprises a plurality of stator laminations, the plurality of stator laminations are stacked along the axial direction thereof;
[0033] As another implementation manner, the stator core can also be integrally formed.
[0034] The yoke part 1 is in a ring structure, and the outer periphery of the ring structure is circular or polygonal, which better copes with motors of different shapes.
[0035] The included angle between the center lines of any two adjacent slot parts is equal, which does not change the included angle of the center line of the traditional stator lamination, and facilitates the assembly of automatic winding.
[0036] The distance from one side of the first slot 4 to the line connecting the tooth shoe midpoint and the center of the stator lamination is defined as L1, the distance from one side of the second slot 5 to the line connecting the tooth shoe midpoint and the center of the stator lamination is defined as L2, and L1
[0037] and / or defining the slot depth of the first slot 4 as D1 and the slot depth of the second slot 5 as D2, and D1>D2, increasing the slot area of the first slot 4 by increasing D1 without changing the overall size;
[0038] and / or defining the first slot 4 bottom arc radius as R1 and the second slot 5 bottom arc radius as R2, and R1>R2, increasing the slot area of the first slot 4 by increasing R1 without changing the overall size
[0039] 0.5*L2<L1<L2; and / or 1.1*D2<D1<1.5*D2; reference Figure 3 、 Figure 4 The device further limits the size relationship between L1 and L2 and further limits the size relationship between D1 and D2, so that L1 and L2, D1 and D2 reach the optimal size ratio, so that the motor reaches the optimal efficiency, and at the same time, the motor noise is also further reduced, as shown in Figure 5 .
[0040] and / or defining the first slot 4 bottom arc radius R1 to the distance from the nearest yoke outer polygon as H1, and the second slot 5 bottom arc radius R2 to the distance from the nearest yoke outer polygon as H2, and H1≤H2, increasing the slot area of the first slot 4 by reducing H1 without changing the overall size.
[0041] Reference Figure 1 、 Figure 2 Each two adjacent first slots 4 have two second slots 5, the shoe 3 between adjacent first slots 4 and second slots 5 is a non-symmetrical structure, and the shoe 3 between adjacent two second slots 5 is a symmetrical structure, so that part of the shoe 3 is in a symmetrical structure and part of the shoe is in an asymmetrical structure, further increasing the slot area of the first slot 4, on the basis of the size of the entire shoe 3 not changing.
[0042] A stator winding, comprising the above-mentioned stator core, the stator winding is a distributed winding structure, and the stator winding comprises a main phase winding M and an auxiliary phase winding A, the main phase winding M and the auxiliary phase winding A are arranged at an electrical angle of 180 degrees. On the premise of ensuring that the slot fill rate does not change, the motor performance, such as motor efficiency, is improved.
[0043] Defining the number of turns of the main phase winding M as N1 and the number of turns of the auxiliary phase winding A as N2, and N1≥N2;
[0044] and / or defining the wire diameter of the main phase winding M as Φ1 and the wire diameter of the auxiliary phase winding A as Φ2, and Φ1≥Φ2.
[0045] As an implementation, the number of turns N1 of the main phase winding M is equal to the number of turns N2 of the auxiliary phase winding A, and the wire diameter Φ1 of the main phase winding M is equal to the wire diameter Φ2 of the auxiliary phase winding A, so that the requirements of the application environment that the motor can rotate in the forward direction and the motor can rotate in the reverse direction can be met.
[0046] Reference Figure 2 , the main phase winding M is defined as M1, M2, and the auxiliary phase winding A is defined as A1, A2, wherein M1 and A1 are arranged in the corresponding second slots 5 respectively, and M2 and A2 are arranged in the corresponding first slots 4.
[0047] The number of the first slots 4 is 8, and the number of the second slots 5 is 16, wherein the M1 spans the slots 1-6, 7-12, 13-18 and 19-24, the A1 spans the slots 4-9, 10-15, 16-21 and 22-3, the M2 spans the slots 2-5, 8-11, 14-17 and 20-23, and the A2 spans the slots 5-8, 11-14, 17-20 and 23-2. By using the winding mode, the performance of the motor is improved under the premise of ensuring the slot fill rate.
[0048] The above is only the preferred specific implementation of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can obtain the technical solutions, concepts and designs according to the technical solutions and concepts of the present application within the technical range disclosed by the present application, and the obtained technical solutions, concepts and designs should be covered in the protection scope of the present application.
Claims
1. A stator core comprising stator laminations, said stator laminations comprising a yoke portion (1), a plurality of tooth portions (2) located in an inner circle of the yoke portion (1), characterized in that, Each two adjacent tooth parts (2) have a groove part, and a plurality of groove parts include a plurality of first grooves (4) and a plurality of second grooves (5), the area of the first groove (4) is larger than that of the second groove (5), the first groove (4) and the second groove (5) are alternately distributed, the opening width of the first groove (4) is equal to that of the second groove (5), each tooth part (2) corresponds to a shoe part (3), and the width of each shoe part (3) is equal.
2. A stator core according to claim 1, characterized in that The stator core comprises a plurality of stator laminations, and the plurality of stator laminations are stacked along the axial direction thereof; The yoke part (1) is in a ring structure, and the outer periphery of the ring structure is circular or polygonal.
3. A stator core according to claim 1, characterized in that The included angle between the center lines of any two adjacent groove parts is equal.
4. A stator core according to claim 1, characterized in that The distance from one side of the first groove (4) to the line connecting the tooth-shoe midpoint and the stator-lamination center is defined as L1, the distance from one side of the second groove (5) to the line connecting the tooth-shoe midpoint and the stator-lamination center is defined as L2, and L1 < L2. The groove depth of the first groove (4) is defined as D1, the groove depth of the second groove (5) is defined as D2, and D1 > D2. The groove-bottom arc radius of the first groove (4) is defined as R1, the groove-bottom arc radius of the second groove (5) is defined as R2, and R1 > R2.
5. A stator core according to claim 4, characterized in that 0.5*L2 < L1 < L2; 1.1*D2 < D1 < 1.5*D2; The distance from the groove-bottom arc radius R1 of the first groove (4) to the outer polygon of the yoke part closest to the first groove (4) is defined as H1, the distance from the groove-bottom arc radius R2 of the second groove (5) to the outer polygon of the yoke part closest to the second groove (5) is defined as H2, and H1 ≤ H2.
6. A stator core according to any one of claims 1-5, characterized in that Each two adjacent first grooves (4) have two second grooves (5) therebetween, the shoe part (3) between adjacent first grooves (4) and second grooves (5) is in an asymmetric structure, and the shoe part (3) between adjacent second grooves (5) is in a symmetric structure.
7. A stator winding, characterized by The stator core comprises the stator core of any one of claims 1-6, the stator winding is in a distributed winding structure, and the stator winding comprises a main-phase winding M and an auxiliary-phase winding A, and the main-phase winding M and the auxiliary-phase winding A are arranged at an electrical angle of 180 degrees.
8. A stator winding according to claim 7, characterised in that The number of turns of the main-phase winding M is defined as N1, the number of turns of the auxiliary-phase winding A is defined as N2, and N1 ≥ N2. The wire diameter of the main-phase winding M is defined as Φ1, the wire diameter of the auxiliary-phase winding A is defined as Φ2, and Φ1 ≥ Φ2.
9. A stator winding according to claim 7 or 8, characterised in that, The main-phase winding M is defined as M1 and M2, and the auxiliary-phase winding A is defined as A1 and A2, wherein M1 and A1 are respectively arranged in separate second grooves (5), and M2 and A2 are arranged in a corresponding first groove (4).
10. A stator winding according to claim 9, characterised in that The number of first grooves (4) is 8, and the number of second grooves (5) is 16, wherein M1 spans grooves 1-6, 7-12, 13-18, and 19-24, A1 spans grooves 4-9, 10-15, 16-21, and 22-3, M2 spans grooves 2-5, 8-11, 14-17, and 20-23, and A2 spans grooves 5-8, 11-14, 17-20, and 23-2.