Winding method of stator structure and stator structure

Abstract

The invention discloses a winding method of a stator structure and the stator structure, and relates to the technical field of motors. According to the winding method provided by the invention, a plurality of stator teeth can be integrally wound by using a single wire under the cooperation of the three-phase joint and the common joint, and after the winding is finished, only the wires at the three-phase joint and the common joint need to be automatically welded through a spot welding machine. According to the technical scheme, cutting and segmented winding of the wire on each stator tooth are not needed, manual segmented welding is also not needed, the winding time can be effectively shortened, the winding efficiency can be improved, the subsequent welding quality can be improved, and the labor cost and the production cost are reduced.

Description

Technical Field

[0001] The present application relates to the field of motor technology, and in particular to a winding method of a stator structure and a stator structure. Background Art

[0002] In the production process of motor stators, the stator winding is generally wound by the triangle winding method and the star winding method. In actual use, the star winding method can effectively reduce the winding withstand voltage, reduce the insulation level, and reduce the starting current of the motor compared to the triangle winding method, which makes the star winding method more widely used.

[0003] Since the star winding method requires the head ends of the three-phase windings to be welded separately to form three separate welding points, and the tail ends to be connected together and welded to form a common welding point, the wire of the winding on each stator tooth needs to be cut off after winding is completed to facilitate the subsequent welding of the head and tail ends of the winding.

[0004] However, when cutting the head and tail ends of the winding, the cutting length cannot be accurately controlled, resulting in the cutting margin being easily too large or too small. If it is too large, the amount and cost of the winding wire will increase, while if it is too small, the subsequent welding difficulty will increase.

[0005] When welding the head and tail ends of the winding, manual welding is generally used. Since the star winding method has more wire ends, manual welding not only has low winding efficiency, but also easily leads to wrong wire ends being connected, resulting in defective stator windings and increased manufacturing costs. Summary of the invention

[0006] One object of the present application is to overcome the deficiencies of the prior art and to provide a winding method for a stator structure with high winding efficiency.

[0007] A winding method provided in this application adopts the following technical solution: A winding method for a stator structure, used for winding a wire on the stator structure, the stator structure comprising a stator yoke, a plurality of stator slots and a plurality of stator teeth, one end of the stator yoke being provided with three phase connectors and a common connector at intervals around its own circumference, the three phase connectors being respectively an A phase connector, a B phase connector and a C phase connector, the plurality of stator teeth respectively correspondingly belonging to the A phase, the B phase and the C phase, the plurality of stator teeth belonging to the A phase, the plurality of stator teeth belonging to the B phase and the plurality of stator teeth belonging to the C phase respectively forming a plurality of branches, the number of the branches being an even number, the winding method comprising the following steps: Step 1, connect the wire end of the wire to the A phase connector; Step 2, winding the wire on the stator teeth included in one of the branches belonging to phase A to form a winding, and leading out the remaining wire and connecting it to a common connector; Step 3, lead out the wire from the common connector and wind it around the stator teeth included in one of the branches belonging to the C phase to form a winding, and lead out the remaining wire and connect it to the C phase connector; Step 4, lead out the wire from the C phase connector and wind it around the stator teeth included in another branch belonging to the C phase to form a winding, and lead out the remaining wire and connect it to the common connector; Step 5, lead out the wire from the common connector and wind it around the stator teeth included in one of the branches belonging to the B phase to form a winding, and lead out the remaining wire and connect it to the B phase connector; Step 6, lead out the wire from the B phase connector and wind it around the stator teeth included in another branch belonging to the B phase to form a winding, and lead out the remaining wire and connect it to the common connector; Step 7, lead the wire out from the common joint and wind it around the stator teeth included in another branch belonging to phase A to form a winding; Step 8, lead out the remaining wires and connect them to the A-phase connector, then repeat steps 2-7 until all stator teeth included in all branches are wound, and connect the tail of the wire to the A-phase connector.

[0008] By adopting the above technical solution, the conductor can realize its overall circulation and winding between multiple stator teeth through the cooperation of three phase connectors and one common connector. After the winding is completed, it is only necessary to automatically weld the conductors at the three phase connectors and one common connector. There is no need to cut and segmentally wind the conductor on each stator tooth, and there is no need to manually segmentally weld. This can not only effectively improve the winding efficiency, but also improve the subsequent welding quality and reduce the production cost.

[0009] Preferably, the number of the plurality of stator teeth is 6N and N is a positive integer.

[0010] Preferably, when two adjacent winding branches of the conductor belong to the same phase, the conductor is connected to a phase connector corresponding to the phase.

[0011] By adopting the above technical solution, the wires on the two branches belonging to the same phase can be gathered on the corresponding phase connectors, which facilitates the subsequent welding of the wires on the three phase connectors to form three-phase welding points.

[0012] Preferably, when two adjacent winding branches of the conductor belong to different phases, the conductor is connected to a common joint.

[0013] By adopting the above technical solution, the wires on the two branches belonging to different phases can be gathered on the common joint, which facilitates the subsequent welding of the wires on the common joint to form a GND welding point.

[0014] Preferably, the conductive wire is alternately connected to the phase connectors and the common connector on its winding path.

[0015] By adopting the above technical solution, the head end and the tail end of the winding on each branch can be connected to the phase connector and the common connector respectively, which effectively improves the winding quality of the stator structure.

[0016] Preferably, the winding method further includes a winding calculation method implemented before step 1, and the winding calculation method includes: S1, determine the number of pole pairs of the magnet; S2, calculating the mechanical angle and electrical angle between multiple stator teeth; S3, drawing a star diagram and determining the distribution of each stator tooth on the star diagram; S4, determining the phase belt affiliation and branch distribution of each stator tooth; S5, determining the original winding direction of the wire on each stator tooth.

[0017] By adopting the above technical solution, the operator can determine the phase belt affiliation and original winding direction of each stator tooth before winding, which effectively improves the winding accuracy of the winding on each stator tooth and improves the quality of the stator structure.

[0018] Preferably, when the lead-out direction of the wire is consistent with the direction from the phase connector to the common connector, the winding direction of the winding formed by the wire on the stator tooth between the two is consistent with the original winding direction; when the lead-out direction of the wire is consistent with the direction from the common connector to the phase connector, the winding direction of the winding formed by the wire on the stator tooth between the two is opposite to the original winding direction.

[0019] By adopting the above technical solution, the winding direction of the winding on each stator tooth can match the current flow direction thereon.

[0020] Another object of the present application is to provide a stator structure.

[0021] A stator structure provided in this application adopts the following technical solution: A stator structure comprises a stator yoke and a plurality of stator slots arranged at intervals in the circumferential direction around the stator yoke, wherein a stator tooth is provided between each two adjacent stator slots, and a winding is wound around each stator tooth, wherein the winding is wound by the above-mentioned winding method.

[0022] In summary, the present invention includes at least one of the following beneficial technical effects: The conductor can be overall circulated and wound between multiple stator teeth through the cooperation of three phase connectors and one common connector. After winding, it is only necessary to automatically weld the conductors at the three phase connectors and one common connector. There is no need to cut and wind the conductors on each stator tooth in sections, and there is no need to manually weld the sections. This can not only effectively improve the winding efficiency, but also improve the subsequent welding quality and reduce production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a winding diagram of the winding method in Example 1 of the present application; Figure 2 is a star diagram of the stator winding in Example 1 of the present application; Figure 3 is a schematic diagram of the winding method in Example 1 of the present application; Figure 4 is a flow chart of the winding method in Example 1 of the present application; Figure 5 is a star diagram of the stator winding in Example 2 of the present application; Figure 6 is a schematic diagram of the winding method in Example 2 of the present application; Figure 7 This is a flow chart of the winding method in Example 2 of the present application.

[0024] Markings in the accompanying drawings: 1. Stator yoke; 2. Stator slots; 3. Stator teeth; 4. Wires; 5. A-phase connector; 6. B-phase connector; 7. C-phase connector; 8. Common connector. DETAILED DESCRIPTION

[0025] The following is combined with Figure 1-7 The present invention is described in further detail.

[0026] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0027] Example 1: See Figure 1-4 As shown, this embodiment discloses a winding method and a stator structure of a stator structure. The stator structure of this embodiment is a stator on a three-phase motor with six slots and four poles, which includes a stator yoke 1, six stator slots 2 and six stator teeth 3, and each stator tooth 3 has a winding.

[0028] One end of the stator yoke 1 is provided with three phase connectors and a common connector 8 at circumferential intervals therearound. The three phase connectors are respectively an A phase connector 5, a B phase connector 6 and a C phase connector 7. The common connector 8 is a GND connector. The six stator teeth 3 belong to the A phase, the B phase and the C phase respectively, and each phase includes two stator teeth 3.

[0029] In a three-phase motor, based on a 60° star diagram, phase A includes A+ phase belt and A- phase belt, phase B includes B+ phase belt and B- phase belt, and phase C includes C+ phase belt and C- phase belt. Before winding the stator structure, the phase belt attribution and winding direction of the six stator teeth 3 need to be calculated.

[0030] Specifically, firstly, the six stator teeth 3 are sorted and numbered in a clockwise direction or a counterclockwise direction, and the six stator teeth 3 are numbered as tooth 1, tooth 2, tooth 3, tooth 4, tooth 5 and tooth 6 respectively.

[0031] Then, the phase belt ownership and winding direction of the six stator teeth 3 are calculated and determined, and the calculation method includes: S1, determine the pole pair number P of the magnet. In this embodiment, the number of magnets is 4, and the pole pair number P is 2.

[0032] S2, calculate the mechanical angle and electrical angle between the six stator teeth 3. Among them, the mechanical angle θ=360° / the number of stator teeth Z=60°, and the electrical angle α=the number of pole pairs P*the mechanical angle θ=120°.

[0033] S3, draw a star diagram according to the electrical angle and determine the distribution of each stator tooth 3 on the star diagram. Figure 2 As shown, the distance between two adjacent numbered stator teeth 3 is 120° respectively.

[0034] S4, determine the phase belt affiliation and branch distribution of each stator tooth 3. Figure 2 As shown, teeth 1 and 4 are in the same direction, teeth 2 and 5 are in the same direction, and teeth 3 and 6 are in the same direction. In this embodiment, the number of parallel branches is set to two, such as Figure 3 As shown, teeth 1 and 4 are connected in parallel as two branches, both of which belong to the A+ phase belt; teeth 2 and 5 are connected in parallel as two branches, both of which belong to the C+ phase belt; teeth 3 and 6 are connected in parallel as two branches, both of which belong to the B+ phase belt.

[0035] S5, determining the original winding direction of the conductor 4 on each stator tooth 3. The original winding directions of the conductor on two stator teeth belonging to the same phase belt are consistent, that is, the original winding directions of teeth 1 and 4 are consistent, both are clockwise; the original winding directions of teeth 2 and 5 are consistent, both are clockwise; the original winding directions of teeth 3 and 6 are consistent, both are clockwise.

[0036] In actual operation, it is agreed that the current direction when the current flows from the three phase connectors to the common connector 8 is forward, and the winding direction of the wires on the corresponding three stator teeth 3 (tooth 1, tooth 3, and tooth 5) is consistent with the original winding direction, which is clockwise; if the current flows from the common connector 8 to the three phase connectors, the current direction is reverse, and the winding direction of the wires on the corresponding three stator teeth 3 (tooth 2, tooth 4, and tooth 6) is opposite to the original winding direction, which is counterclockwise.

[0037] In this embodiment, if Figure 1 , Figure 3 and Figure 4 As shown, the specific winding method includes the following steps: Step 1, connect the end of the wire 4 to the A phase connector 5; Step 2, winding the wire 4 clockwise around one tooth belonging to the A+ phase belt to form a winding, and leading out the remaining wire 4 and connecting it to the common connector 8; Step 3, lead the wire 4 from the common connector 8 and wind it counterclockwise on the two teeth belonging to the C+ phase belt to form a winding, and lead the remaining wire 4 and connect it to the C phase connector 7; Step 4, lead the wire 4 from the C phase connector 7 and wind it clockwise on the 5 teeth belonging to the C+ phase belt to form a winding, lead the remaining wire 4 and connect it to the common connector 8; Step 5, lead the wire 4 from the common connector 8 and wind it counterclockwise on the 6 teeth belonging to the B+ phase belt to form a winding, and lead the remaining wire 4 and connect it to the B phase connector 6; Step 6, lead the wire 4 from the B phase connector 6 and wind it on the three teeth belonging to the B+ phase belt to form a winding, and lead the remaining wire 4 and connect it to the common connector 8; Step 7, lead out the wire 4 from the common connector 8 and wind it around the 4 teeth belonging to the A+ phase belt to form a winding, and connect the tail of the wire 4 to the A phase connector 5.

[0038] The above winding method can realize the overall circulation and winding of the wire 4 between the six stator teeth 3 by switching three phase joints and one common joint 8. After the winding is completed, only the wire 4 at the four joints needs to be spot welded, and there is no need to cut and segment the wire 4 on each stator tooth 3. It can not only effectively improve the winding efficiency, but also improve the subsequent welding quality and reduce production costs. In the specific winding operation process, winding equipment and automatic spot welding equipment can be used to realize automated production without manual assistance, saving labor costs and improving production efficiency.

[0039] Embodiment 2: Figure 5-7As shown, the difference between this embodiment and embodiment 1 is that the stator structure is a stator of a three-phase motor with twelve slots and fourteen poles, which has twelve stator slots 2 and twelve stator teeth 3. Each stator tooth 3 has a winding. The twelve stator teeth 3 belong to phase A, phase B and phase C respectively, and each phase includes four stator teeth 3.

[0040] Similarly, before winding the stator structure, the phase band affiliation and winding direction of the twelve stator teeth 3 are calculated.

[0041] Specifically, firstly, the twelve stator teeth 3 are sorted and numbered in a clockwise direction or a counterclockwise direction, and the numbers are 1 tooth, 2 teeth, 3 teeth, 4 teeth, 5 teeth, 6 teeth, 7 teeth, 8 teeth, 9 teeth, 10 teeth, 11 teeth, and 12 teeth respectively.

[0042] Then the phase belt affiliation and original winding direction of the twelve stator teeth 3 are calculated and determined. The calculation method includes: S1, determining the pole pair number P of the magnet. In this embodiment, the number of magnets is 14, and the pole pair number P is 7.

[0043] S2, calculate the mechanical angle and electrical angle between the twelve stator teeth 3. Among them, the mechanical angle θ=360° / the number of stator teeth Z=30°, and the electrical angle α=the number of pole pairs P*the mechanical angle θ=210°.

[0044] S3, draw a star diagram according to the electrical angle and determine the distribution of each stator tooth 3 on the star diagram, such as Figure 5 As shown, the distance between two adjacent numbered stator teeth 3 is 210° respectively.

[0045] S4, determine the phase belt affiliation and branch distribution of each stator tooth 3. Figure 5 As shown, teeth 1 and 8 belong to the A+ phase belt, teeth 3 and 10 belong to the C- phase belt, teeth 5 and 12 belong to the B+ phase belt, teeth 2 and 7 belong to the A- phase belt, teeth 4 and 9 belong to the C+ phase belt, and teeth 6 and 11 belong to the B- phase belt.

[0046] At the same time, the present embodiment sets the number of parallel branches to two. According to the above phase band division, Figure 6 As shown, teeth 1 and 2 are connected in series to form a branch, teeth 7 and 8 are connected in series to form a branch, and the two branches are connected in parallel; teeth 3 and 4 are connected in series to form a branch, teeth 9 and 10 are connected in series to form a branch, and the two branches are connected in parallel; teeth 5 and 6 are connected in series to form a branch, teeth 11 and 12 are connected in series to form a branch, and the two branches are connected in parallel.

[0047] S5, determine the original winding direction of the wire 4 on each stator tooth 3. The original winding direction of the wire 4 on the two stator teeth 3 belonging to the same phase belt is consistent, that is, in the A phase, the original winding direction of the 1st tooth and the 8th tooth belonging to the A+ phase belt is consistent, which is clockwise, and the original winding direction of the 2nd tooth and the 7th tooth belonging to the A-phase belt is consistent, which is counterclockwise; in the B phase, the original winding direction of the 5th tooth and the 12th tooth belonging to the B+ phase belt is consistent, which is clockwise, and the original winding direction of the 6th tooth and the 11th tooth belonging to the B-phase belt is consistent, which is counterclockwise; in the C phase, the original winding direction of the 4th tooth and the 9th tooth belonging to the C+ phase belt is consistent, which is clockwise, and the original winding direction of the 3rd tooth and the 10th tooth belonging to the C-phase belt is consistent, which is counterclockwise.

[0048] In actual operation, it is agreed that the current direction when flowing from the three phase connectors to the common connector 8 is forward, and the winding direction on the corresponding stator teeth (tooth 1, tooth 2, tooth 3, tooth 4, tooth 5, tooth 6) is consistent with the original winding direction; if the current flows from the common connector to the three phase connectors, the current direction is reverse, and the winding direction on the corresponding stator teeth (tooth 7, tooth 8, tooth 9, tooth 10, tooth 11, tooth 12) is opposite to the original winding direction.

[0049] In this embodiment, if Figure 7 As shown, the specific winding method includes the following steps: Step 1, connect the end of the wire 4 to the A phase connector 5; Step 2, winding the wire 4 clockwise around 1 tooth belonging to the A+ phase belt to form a winding, and then winding it counterclockwise around 2 teeth belonging to the A- phase belt to form a winding, and leading out the remaining wire 4 and connecting it to the common connector 8; Step 3, lead the wire 4 from the common connector 8 and wind it clockwise on the 10 teeth belonging to the C-phase belt to form a winding, then wind it counterclockwise on the 9 teeth belonging to the C+phase belt to form a winding, lead the remaining wire 4 and connect it to the C phase connector 7; Step 4, lead the wire 4 from the C phase connector 7 and wind it clockwise on the 4 teeth belonging to the C+ phase belt to form a winding, then wind it counterclockwise on the 3 teeth belonging to the C- phase belt to form a winding, lead the remaining wire 4 and connect it to the common connector 8; Step 5, lead the wire 4 from the common connector 8 and wind it clockwise on the 11 teeth belonging to the B-phase belt to form a winding, then wind it counterclockwise on the 12 teeth belonging to the B+phase belt to form a winding, lead the remaining wire 4 and connect it to the B phase connector 6; Step 6, lead the wire 4 from the B phase connector 6 and wind it clockwise on the 5 teeth belonging to the B+ phase belt to form a winding, then wind it counterclockwise on the 6 teeth belonging to the B- phase belt to form a winding, lead the remaining wire 4 and connect it to the common connector 8; Step 7, lead out the wire 4 from the common connector 8 and wind it clockwise on the 7 teeth belonging to the A-phase belt to form a winding, then wind it counterclockwise on the 8 teeth belonging to the A+phase belt to form a winding, and connect the tail of the wire 4 to the A phase connector 5.

[0050] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A winding method for a stator structure, for winding a conductor (4) on the stator structure, wherein the stator structure comprises a stator yoke (1), a plurality of stator slots (2) and a plurality of stator teeth (3), characterized in that: One end of the stator yoke (1) is provided with three phase connectors and a common connector (8) at intervals around the stator yoke itself in the circumferential direction. The three phase connectors are respectively an A phase connector (5), a B phase connector (6) and a C phase connector (7). The plurality of stator teeth (3) respectively belong to the A phase, the B phase and the C phase. The plurality of stator teeth (3) belonging to the A phase, the plurality of stator teeth (3) belonging to the B phase and the plurality of stator teeth (3) belonging to the C phase respectively form a plurality of branches. The number of the branches is an even number. The winding method comprises the following steps: Step 1, connecting the end of the wire (4) to the A phase connector (5); Step 2, winding the wire (4) on the stator teeth (3) included in one of the branches belonging to phase A to form a winding, and leading out the remaining wire (4) and connecting it to the common connector (8); Step 3, lead the wire (4) out from the common connector (8) and wind it around the stator teeth (3) included in one of the branches belonging to the C phase to form a winding, and lead the remaining wire (4) out and connect it to the C phase connector (7); Step 4, lead the wire (4) from the C phase connector (7) and wind it around the stator teeth (3) included in another branch belonging to the C phase to form a winding, and lead the remaining wire (4) and connect it to the common connector (8); Step 5, lead the wire (4) out from the common connector (8) and wind it around the stator teeth (3) included in one of the branches belonging to the B phase to form a winding, and lead the remaining wire (4) out and connect it to the B phase connector (6); Step 6, lead the wire (4) out from the B phase connector (6) and wind it around the stator teeth (3) included in another branch belonging to the B phase to form a winding, and lead the remaining wire (4) out and connect it to the common connector (8); Step 7, lead the wire (4) out from the common connector (8) and wind it around the stator teeth (3) included in another branch belonging to phase A to form a winding; Step 8, lead out the remaining wire (4) and connect it to the A phase connector (5), then repeat steps 2-7 until the stator teeth included in all branches are wound, and connect the tail of the wire (4) to the A phase connector (5).

2. A winding method for a stator structure according to claim 1, characterized in that: The number of the plurality of stator teeth (3) is 6N, and N is a positive integer.

3. A winding method for a stator structure according to claim 1 or 2, characterized in that: When two adjacent winding branches of the conductor (4) belong to the same phase, the conductor (4) is connected to a phase connector corresponding to the phase.

4. A winding method for a stator structure according to claim 1 or 2, characterized in that: When two adjacent winding branches of the conductor (4) belong to different phases, the conductor (4) is connected to a common joint (8).

5. A winding method for a stator structure according to claim 1 or 2, characterized in that: The conductor (4) is alternately connected to the phase connectors and the common connector (8) on its winding path.

6. A winding method for a stator structure according to claim 1 or 2, characterized in that: The winding method further includes a winding calculation method implemented before step 1, wherein the winding calculation method includes: S1, determine the number of pole pairs of the magnet; S2, calculating the mechanical angle and electrical angle between a plurality of stator teeth (3); S3, drawing a star diagram and determining the distribution of each stator tooth (3) on the star diagram; S4, determining the phase band affiliation and branch distribution of each stator tooth (3); S5, determining the original winding direction of the conductor (4) on each stator tooth (3).

7. A winding method for a stator structure according to claim 6, characterized in that: When the lead-out direction of the wire (4) is consistent with the direction from the phase connector to the common connector (8), the winding direction of the winding formed by the wire (4) on the stator tooth (3) between the two is consistent with the original winding direction; when the lead-out direction of the wire (4) is consistent with the direction from the common connector (8) to the phase connector, the winding direction of the winding formed by the wire (4) on the stator tooth (3) between the two is opposite to the original winding direction.

8. A stator structure, comprising a stator yoke (1), a plurality of stator slots (2) arranged at intervals in the circumferential direction around the stator yoke (1), a stator tooth (3) being provided between each two adjacent stator slots (2), and a winding being wound around each stator tooth (3), characterized in that: The winding is wound by the winding method according to any one of claims 1 to 7.

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