Motor winding
By plugging the silicon steel sheet tooth group into the gap of the flat motor winding and fixing it axially with the outer ring of the iron core, the complex problem of the preparation process of the flat motor winding is solved, and simple operation and automated operations are achieved.
Patent Information
- Application Number
- CN202420776358.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-15
- Publication Date
- 2025-02-07
- Estimated Expiration
- 2034-04-15
AI Technical Summary
The preparation process of flat wire motor windings is complicated and difficult to achieve automation, resulting in low operating efficiency.
A silicon steel sheet tooth group is inserted into the gap arranged in the circumferential direction of the winding to form a fixed structure between the tooth group and the outer ring of the iron core in the axial direction, simplifying the bending and welding process of the conductor.
It realizes the preparation process of motor windings and is easy to operate, facilitates automated operations, and improves operating efficiency.
Smart Images
Figure CN222441430U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a motor winding, in particular to a flat wire motor winding. Background Art
[0002] With the development of power motors, conductors with rectangular cross sections, especially flat-section conductors, have become a development trend for power motors. The flat wire motor windings formed by conductors with rectangular cross sections have regular layout and high slot fill rate, which improves the motor's torque output and heat dissipation capabilities.
[0003] However, the flat wire motor winding is similar to the conventional motor winding in that the preparation process is relatively complicated, and generally the conductor is passed through the wire slot on the iron core and then the ends of the conductor are bent and welded. This method has low operating efficiency and is difficult to automate. Utility Model Content
[0004] The utility model provides a motor winding which has a simple preparation process, is easy to operate and is convenient for automated operation.
[0005] The motor winding comprises a winding composed of conductors and an iron core with wire slots, wherein the winding has gaps arranged in the circumferential direction of the winding, and the gaps are narrow inside and wide outside in the radial direction of the winding;
[0006] The iron core comprises an inner core ring, an outer core ring and a positioning member for fixing the inner core ring and the outer core ring in the axial direction of the winding;
[0007] The inner ring of the core is formed by tooth groups passing through each gap, and each tooth group is formed by a plurality of silicon steel sheet teeth stacked in the axial direction of the winding;
[0008] Each silicon steel sheet tooth body is in the shape of a sheet, and includes an inner tooth portion, a main body portion, a neck portion, and an outer tooth portion from the inside to the outside in the radial direction of the winding. The width of the inner tooth portion is greater than the minimum width of the gap, the width of the outer tooth portion is less than the maximum width of the gap, and the width of the neck portion is less than the width of the outer tooth portion;
[0009] The main body of the silicon steel sheet tooth body is in the gap of the winding, the inner tooth part is located inside the inner circle of the winding, and the neck and the outer tooth part are located outside the outer circle of the winding;
[0010] The inner circumference of the outer ring of the core is arranged with slots, and the number of the slots is equal to the tooth group; the slots extend along the axial direction of the winding, including an outer slot with a width not less than the width of the outer tooth part and an inner slot with a width not less than the width of the neck;
[0011] The outer teeth of the tooth group are inserted into the outer groove, and the neck of the tooth group passes through the inner groove.
[0012] In the above-mentioned motor winding, the slot is a through slot that passes through both ends of the outer ring of the iron core.
[0013] In the above-mentioned motor winding, the width of the outer slot is larger than the outer tooth portion; the positioning piece is a clamping column passing through the outer slot, and the two ends of the clamping column extend beyond the two end surfaces of the iron core and are both bent with an iron core outer ring clamping claw and an outer tooth portion clamping claw, the two iron core outer ring clamping claws clamp the iron core outer ring, and the two outer tooth portion clamping claws clamp the outer tooth portion.
[0014] In the motor winding mentioned above, two clamping columns are arranged on both sides of the outer tooth portion in an outer slot.
[0015] In the above-mentioned motor winding, the positioning members are two retaining rings which are arranged at both ends of the outer ring of the iron core and press the outer teeth.
[0016] The outer ring of the iron core of the motor winding is made of laminated silicon steel sheets.
[0017] The beneficial effects of the utility model are as follows: first, the ends of the conductors are bent and welded to form windings, and then the silicon steel sheet teeth are inserted into the gaps of the windings, which is convenient and simple to operate. Moreover, when preparing the windings, since there is no need to pass the conductors through the wire slots of the iron core as in conventional methods, the bending and welding of the ends of the conductors are easy to operate and implement. The outer teeth of the tooth group formed by stacking a plurality of silicon steel sheet teeth inserted into the gaps of the windings are pressed into the outer grooves on the outer ring of the iron core, and the necks of the tooth groups are passed through the inner grooves on the outer ring of the iron core. Then, each tooth group is axially fixed to the outer ring of the iron core to form the motor winding. The inner teeth fix the windings in the radial direction. The overall operation is simple and convenient for automated operation.
[0018] Insert a clamping column with two forked clamping claws at both ends into the outer groove, the clamping claws extend beyond the two end surfaces of the iron core, bend one clamping claw at each end of the clamping column toward the outer ring of the iron core to clamp the outer ring of the iron core, and bend the remaining two clamping claws at both ends of the clamping column toward the outer tooth part of the iron core to clamp the outer tooth part. This structure and method of fixing each tooth group to the outer ring of the iron core in the axial direction is easier to operate and has reliable positioning.
[0019] Alternatively, it is also completely feasible to use two retaining rings fixed at both ends of the outer ring of the iron core, and the two retaining rings press the outer teeth at the same time, so as to fix each tooth group and the outer ring of the iron core in the axial direction.
[0020] The outer ring of the core is made of stacked silicon steel sheets. In this way, the outer ring of the core and the inner ring of the core formed by each tooth group are all made of silicon steel sheets, and the heat loss of the motor winding is smaller. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 is the winding schematic diagram;
[0022] Figure 2 It is a schematic diagram of the connection between the tooth group and the winding;
[0023] Figure 3 yes Figure 2A partial enlarged view of
[0024] Figure 4 It is a three-dimensional diagram of the tooth group;
[0025] Figure 5 It is a schematic diagram of a silicon steel sheet tooth body;
[0026] Figure 6 It is a schematic diagram of the connection between the winding and all tooth groups;
[0027] Figure 7 It is a schematic diagram of the outer ring of the stator core;
[0028] Figure 8 It is a schematic diagram of the stator core inner ring tooth group pressed into the stator core outer ring;
[0029] Fig. 9 yes Figure 8 A partial enlarged view of
[0030] Fig.10 yes Fig. 9 A top view of
[0031] Fig.11 yes Fig.10 A partial enlarged view of
[0032] Fig.12 is a top view of the stator winding after manufacture;
[0033] Fig.13 yes Fig.12 A partial enlarged view of
[0034] Fig.14 is a three-dimensional diagram of the stator winding after manufacture;
[0035] Fig.15 yes Fig.14 A partial enlarged view of
[0036] Fig.16 , 17 They are three-dimensional images of the clamping column (after the clamping claws are bent).
[0037] In the figure, winding 100, gap 101, stator core inner ring 200, stator core outer ring 300,
[0038] Silicon steel sheet tooth body 1, inner tooth portion 11, main body portion 12, neck portion 13, outer tooth portion 14,
[0039] Tooth group 2,
[0040] Card slot 3, outer slot 34, inner slot 33,
[0041] Clamp column 4, outer clamping claw 44, inner clamping claw 43, DETAILED DESCRIPTION
[0042] The stator winding preparation process for flat wire motors.
[0043] See also Figure 1 , first bend and weld the conductor ends to form the winding 100, which is a routine operation in this field. The winding 100 has gaps 101 arranged in the circumferential direction of the winding, and the gaps 101 are narrow inside and wide outside in the radial direction of the winding. The gaps close to the winding axis are the inner part, and the gaps away from the winding axis are the outer part. The width refers to the arc length, arc or angle in the circumferential direction of the winding. In other words, the width is narrow at the gap close to the winding axis, and the width is narrow at the gap away from the winding axis.
[0044] See also Figure 5 The silicon steel sheet tooth body 1 is in an axisymmetric sheet shape, and includes an inner tooth portion 11, a main body portion 12, a neck portion 13, and an outer tooth portion 14 from the inside to the outside in the radial direction of the winding. The width of the inner tooth portion 11 is greater than the minimum width of the gap, the width of the outer tooth portion is less than the maximum width of the gap, and the width of the neck portion is less than the width of the outer tooth portion. The width of the main body portion 12 is narrow inside and wide outside in the radial direction of the winding, and is consistent with the width of the gap 101.
[0045] See also Figure 2 , 3 6. From the inside of the inner circle of the winding, insert the silicon steel sheet tooth body into the gap of the winding with a slight tilt (the plane where the silicon steel sheet tooth body is located forms an angle of less than 90° with the winding cross section), and then rotate the silicon steel sheet tooth body to a state parallel to the winding cross section. The main body 12 of the silicon steel sheet tooth body 1 is placed in the gap of the winding, the inner tooth part is located inside the inner circle of the winding, the outer edge of the inner tooth part is in contact with the inner circle of the winding, and the neck and the outer tooth part are located outside the outer circle of the winding; in the same gap, multiple silicon steel sheet teeth 1 are stacked in the axial direction of the winding to form a tooth group 2, and the tooth groups in all gaps form the inner circle 200 of the stator core. In order to be clearer, Figure 2 , 3 , 6, 8-10, 13, 14, the tooth group 2 is simplified, and its specific structure is shown in Figure 4 .
[0046] See also Figure 7 The inner circumference of the stator core outer ring 300 formed by laminating silicon steel sheets is provided with slots 3, and the number of the slots is equal to the tooth group. The slots are through slots extending along the winding axial direction and passing through both ends of the stator core outer ring, including an outer slot 34 with a width greater than the width of the outer tooth portion and an inner slot 33 with a width equal to the width of the neck.
[0047] See also Figure 8-11 , along the axial direction of the winding, the outer tooth portion 14 of the tooth group passing through the winding 100 is pressed into the outer groove 34, and the neck 13 of the tooth group is located in the inner groove 33.
[0048] Insert two clamping posts 4 into the same outer groove along the axial direction from one end of the outer groove, and the outer tooth portion 14 of the tooth group is between the two clamping posts 4 in the same outer groove. Figure 16-17 , both ends of the clamping column 4 extend beyond the two end surfaces of the stator core, and are two forked claws, namely, the outer claw 44 and the inner claw 43. The outer claw 44 is bent counterclockwise, and the inner claw 43 is bent clockwise. The two outer claws at the two ends of the clamping column adjacent to each other in the circumferential direction of the motor winding respectively clamp the outer ring of the stator core and the outer teeth; the two inner claws at the two ends of the clamping column adjacent to each other in the circumferential direction of the motor winding respectively clamp the outer ring of the stator core and the outer teeth. However, for the same clamping column, if the two outer claws 44 clamp the outer ring of the stator core, the two inner claws 43 clamp the outer teeth; if the two inner claws 43 clamp the outer ring of the stator core, the two outer claws 44 clamp the outer teeth.
[0049] The final stator winding is shown in Figure 12-15 The stator winding includes a winding 100 composed of a conductor and a stator core composed of a stator core inner ring 200, a stator core outer ring 300, and a clamping column 4. The stator core inner ring 200 is composed of tooth groups 2 passing through the winding gap, and the tooth group 2 is formed by stacking multiple silicon steel sheet teeth 1.
Claims
1. A motor winding, comprising a winding composed of a conductor and an iron core having wire slots, wherein the winding has gaps arranged in the circumferential direction of the winding, and the gaps are narrow inside and wide outside in the radial direction of the winding; wherein the characteristics are: The iron core comprises an inner core ring, an outer core ring and a positioning member for fixing the inner core ring and the outer core ring in the axial direction of the winding; The inner ring of the core is formed by tooth groups passing through each gap, and each tooth group is formed by a plurality of silicon steel sheet teeth stacked in the axial direction of the winding; Each silicon steel sheet tooth body is in the shape of a sheet, and includes an inner tooth portion, a main body portion, a neck portion, and an outer tooth portion from the inside to the outside in the radial direction of the winding. The width of the inner tooth portion is greater than the minimum width of the gap, the width of the outer tooth portion is less than the maximum width of the gap, and the width of the neck portion is less than the width of the outer tooth portion; The main body of the silicon steel sheet tooth body is in the gap of the winding, the inner tooth part is located inside the inner circle of the winding, and the neck and the outer tooth part are located outside the outer circle of the winding; The inner circumference of the outer ring of the core is arranged with slots, and the number of the slots is equal to the tooth group; the slots extend along the axial direction of the winding, including an outer slot with a width not less than the width of the outer tooth part and an inner slot with a width not less than the width of the neck; The outer teeth of the tooth group are inserted into the outer groove, and the neck of the tooth group passes through the inner groove.
2. The motor winding according to claim 1, characterized in that: The slot is a through slot that runs through both ends of the outer ring of the iron core.
3. The motor winding according to claim 2, characterized in that: The width of the outer groove is greater than that of the outer tooth portion; the positioning piece is a clamping column passing through the outer groove, and both ends of the clamping column extend beyond the two end surfaces of the iron core and have a bent iron core outer ring clamping claw and an outer tooth portion clamping claw, the two iron core outer ring clamping claws clamp the iron core outer ring, and the two outer tooth portion clamping claws clamp the outer tooth portion.
4. The motor winding according to claim 3, characterized in that: Two clamping columns are arranged on both sides of the outer tooth portion in an outer groove.
5. The motor winding according to claim 2, characterized in that: The positioning members are two retaining rings arranged at the two ends of the outer ring of the iron core and pressing the outer teeth.
6. The motor winding according to claim 1, characterized in that: The outer ring of the core is made of stacked silicon steel sheets.