A continuous stator winding for an electric motor, a stator, and an electric motor.

Abstract

This utility model provides a continuous stator winding, a stator, and a motor, including a multi-phase winding. Each phase winding includes multiple branch windings arranged in parallel. Each branch winding has a continuous winding structure. The multiple branch windings are arranged in multiple groups. The multiple branch windings in each group are arranged adjacent to each other. The corresponding ends of two adjacent groups of branch windings are located in adjacent magnetic poles. In each slot of the stator core, multiple layers are arranged along the radial direction of the stator core. Each group of branch windings is arranged sequentially in each layer along the radial direction of the stator core. In each layer, they are arranged sequentially in the corresponding slots of each magnetic pole along the circumferential direction of the stator core. In each layer, adjacent groups of branch windings have at least one crossing position. At the crossing position, the adjacent groups of branch windings are swapped, without connecting solder joints. The axial length of the stator core is reduced, resulting in high reliability and lower material costs.

Description

Technical Field

[0001] This utility model belongs to the field of motor technology, and in particular relates to a continuous stator winding, stator and motor. Background Technology

[0002] The stator windings of flat wire motors are mostly connected by welding, which takes up a lot of space at the ends and requires insulation treatment. There is a risk of missing or broken welds at the solder joints, and the manufacturing process is complex and costly. Summary of the Invention

[0003] In view of the above problems, this utility model provides a continuous stator winding, stator and motor to solve the above or other problems existing in the prior art.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a continuous stator winding of a motor, including a multi-phase winding, each phase winding including multiple branch windings arranged in parallel, each branch winding having a continuous winding structure, the multiple branch windings being set into multiple groups, the multiple branch windings in each group being arranged adjacently, and the corresponding ends of two adjacent groups of branch windings being located in adjacent magnetic poles.

[0005] Multiple layers are arranged in each slot of the stator core along the radial direction of the stator core. Any branch winding is arranged in each layer in sequence along the radial direction of the stator core, and in each layer, it is arranged in the corresponding slot of each magnetic pole in sequence along the circumferential direction of the stator core.

[0006] Within each layer group, there is at least one cross position between two adjacent branch winding groups. At the cross position, the two adjacent branch winding groups switch layers.

[0007] Furthermore, each layer group includes at least two adjacent layers. Within each layer group, two adjacent branch windings exchange their layer positions at the crossover position and enter the adjacent layer from the layer they are located on.

[0008] Furthermore, along the circumferential direction of the stator core, each branch winding portion between two adjacent cross positions is located on the same layer, and the portions of each branch winding located on both sides of any cross position are located on two adjacent layers respectively, and layer switching is performed at the cross position.

[0009] Furthermore, any branch winding is made by winding a single conductor. When winding any branch winding, it is configured such that, in each layer group, the conductor is sequentially passed through the corresponding slot in each magnetic pole along the circumferential direction of the stator core and is wound in an S-shape in the axial direction of the stator core.

[0010] Furthermore, within any magnetic pole, along the radial direction of the stator core, any branch winding is arranged with one layer spaced apart, or a portion of any branch winding is arranged adjacent to each other, while the remaining portions are arranged with one layer spaced apart.

[0011] Furthermore, the intersection of two adjacent sets of branch windings is located within a portion of the magnetic pole. Along the radial direction of the stator core, at least one layer group within any magnetic pole with an intersection is provided with an intersection position for two adjacent sets of branch windings. The corresponding intersection positions of any branch winding in each layer group are all located in the same slot of the same magnetic pole, or, a portion of the corresponding intersection positions of any branch winding in each layer group are located in a slot of a magnetic pole, and another portion is located in another slot adjacent to that slot within the same magnetic pole.

[0012] Furthermore, the two ends of each branch winding are located on the radial sides of the stator core, and the two ends of each branch winding are located within two adjacent magnetic poles.

[0013] Furthermore, the stator core has an even number of radial layers, which is greater than or equal to 6, and the number of branch windings is an even number.

[0014] Furthermore, the number of slots per pole per phase is greater than or equal to 2.

[0015] A stator comprising, as described above, a continuous stator winding for an electric motor.

[0016] An electric motor, comprising a stator as described above.

[0017] Due to the adoption of the above technical solution, the continuous stator winding of this motor has a continuous winding structure. Both ends of the stator winding are continuous structures without welding, and the connection has no solder joints. Compared with the space occupied by the axial ends of the stator winding connected by welding, the axial length of the stator core is reduced, and no insulation treatment is required at the connection. This results in high reliability, less copper usage, reduced material costs, and reduced copper loss. The stator winding has multiple sets of branch windings, and adjacent sets of branch windings have at least one cross position in each layer. When adjacent sets of branch windings are wound in a layer, they must cross and switch layers at least once. This allows multiple sets of branch windings to be set in each layer. The stator winding manufacturing process is simple and meets the performance requirements of the stator winding. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the cross-sectional structure of one phase winding of the stator winding according to Embodiment 1 of this utility model;

[0019] Figure 2 This is a schematic diagram of the cross-sectional structure of one phase winding of the stator winding in Embodiment 2 of this utility model;

[0020] Figure 3This is a schematic diagram of the cross-sectional structure of one phase of the stator winding in Embodiment 3 of this utility model;

[0021] Figure 4 This is a schematic diagram of the cross-sectional structure of one phase of the stator winding in Embodiment 4 of this utility model;

[0022] Figure 5 This is a cross-sectional structural diagram of one phase winding of the stator winding in Embodiment 5 of this utility model.

[0023] In the picture:

[0024] 1. First branch winding; 2. Second branch winding; 3. Third branch winding

[0025] 4. Fourth branch winding; 5. Cross position Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0027] Figure 1 The diagram shows a structural schematic of an embodiment of the present invention. This embodiment relates to a continuous stator winding, a stator, and a motor. In the continuous stator winding, any branch winding is a continuous winding structure, and when any branch winding is wound in any layer, it is cross-layered at the cross position, so that multiple branch windings can be set in each layer. The ends of the stator winding at both ends of the stator core are continuous structures without connecting solder joints. The length of the ends in the axial direction of the stator core is small, and no insulation treatment is required at the connection. This results in high reliability, less copper usage, and reduced material costs.

[0028] A type of continuous stator winding for an electric motor, such as Figure 1-4 As shown, it includes a multi-phase winding, which is installed on the stator. Each phase winding is a continuous winding structure. Each branch winding in each phase winding is continuously wound by a conductor along the circumferential and radial directions of the stator core. The two ends of the conductor are located on the radial sides of the stator core, forming a phase winding structure.

[0029] The number of phases in the multiphase winding is selected according to actual needs, and no specific requirements are made here. In some feasible embodiments, the multiphase winding is preferably a three-phase winding, and the three-phase windings are arranged sequentially along the circumferential direction of the stator core. The three-phase windings have the same structure, except that they occupy different slots on the stator core. The following is a detailed description of the structure of a single-phase winding as an example.

[0030] Any phase winding includes multiple branch windings connected in parallel. That is, for a multi-phase winding, each phase winding includes multiple branch windings connected in parallel. The number of branch windings in each phase winding is selected according to actual needs, and no specific requirements are made here.

[0031] If any branch winding is a continuous winding structure, that is, in any phase winding, each of the multiple branch windings is a continuous winding structure, then a phase winding composed of multiple branch windings is also a continuous winding structure. Structurally, each branch winding is formed by winding a single conductor along the circumferential and radial directions of the stator core, having multiple slots and bends. The slots are located within the slots of the stator core, and the bends are located at both axial ends of the stator core. Along the circumferential direction of the stator core, in any layer, the first end of the first slot passes through... A bend connects to the first end inside the second adjacent slot, the second end inside the second slot connects to the second end inside the third adjacent slot through another bend, and so on. Multiple slots are connected sequentially along the circumferential direction of the stator core through corresponding bends. After the connection of multiple slots in this layer is completed, the process is repeated across layers until the connection of slots in all layers is completed. The connection method here is integral molding, forming a branch winding of a continuous winding structure. Multiple continuous branch windings form a phase winding structure. A phase winding is constructed by using branch windings with multiple continuous winding structures, so that both ends of the phase winding are continuous structures without solder joints, eliminating the need for welding. Furthermore, the axial ends of the phase winding are wound around the corresponding teeth of the stator core, resulting in a shorter length of the turning structure at both ends of the phase winding in the axial direction of the stator core. This reduces the space occupied at the ends of the stator winding compared to the space occupied by the axial ends of a stator winding constructed with hairpin coils (which requires welding connections). The continuous stator winding occupies less space at the ends. At the same time, since no welding is required, reliability is improved, the manufacturing process is simplified, and material costs are reduced.

[0032] In each phase winding, the multiple branch windings are wound in the same way, only the slots they occupy on the stator core are different. In any phase winding, the multiple branch windings are configured as multiple groups, with each group containing multiple branch windings. The number of groups of branch windings in each phase winding is even; it can be two, four, or any other even number. The number of groups of branch windings in each phase winding is selected according to actual needs and is not specifically required here. Similarly, the number of branch windings in each group can be two, three, or any other number, again selected according to actual needs and is not specifically required here. In some feasible embodiments, preferably, the multiple branch windings are divided into two groups, with each group containing two branch windings.

[0033] Along the circumferential direction of the stator core, multiple branch windings in each group of branch windings are arranged adjacently. These branch windings are located in adjacent slots within the same magnetic pole. Corresponding ends (which can be either the input or output end) of two adjacent groups of branch windings are located within adjacent magnetic poles. For example, the corresponding ends of two adjacent groups of branch windings located in or near the radial inner layer of the stator core are located within adjacent magnetic poles. During setup, within the same magnetic pole, each branch winding is located in adjacent slots. That is, when each branch winding is wound on the stator core, it has multiple slots. Within the same magnetic pole, in each layer occupied by each group of branch windings, the slots of multiple branch windings in each group of branch windings are located in adjacent slots within that magnetic pole. The multiple branch windings in each group of branch windings are arranged adjacently along the circumferential direction of the stator core. Within each magnetic pole, the slots of each branch winding are all located in adjacent slots.

[0034] When multiple sets of branch windings are configured, they are arranged sequentially along the circumferential direction of the stator core. One corresponding end of each branch winding (which can be either the input or output end) is located within different magnetic poles. The corresponding ends of two adjacent branch windings (which can also be either the input or output end) are located within two adjacent magnetic poles. Depending on the winding method, the other corresponding ends of two adjacent branch windings are also located within two adjacent magnetic poles. The magnetic poles at both ends of each branch winding can be the same or different poles, depending on actual needs; no specific requirements are specified here. In some feasible embodiments, preferably, the two ends of each branch winding (which are the input and output ends of each branch winding, respectively) are located within different magnetic poles, and these two magnetic poles are arranged adjacent to each other.

[0035] Each slot of the stator core contains multiple slots that form branch windings. These slots are arranged sequentially along the radial direction of the stator core, with each slot containing one layer. In other words, each slot of the stator core contains multiple layers along the radial direction. These multiple layers within each slot are grouped, with multiple layer groups arranged along the radial direction of the stator core. The number of layer groups within each slot is selected based on actual needs and is not specifically required here. Each layer group includes at least two adjacent layers, meaning each layer group contains multiple layers arranged sequentially adjacent to each other, with a maximum of two layers. The number of layers within each layer group is selected based on actual needs and is not specifically required here.

[0036] Any set of branch windings is arranged sequentially in each layer group along the radial direction of the stator core, and in each layer group, they are arranged sequentially in each magnetic pole along the circumferential direction of the stator core. Multiple layers are arranged sequentially along the radial direction from the innermost layer to the outermost layer of the stator core or along the radial direction from the outermost layer to the innermost layer of the stator core. A portion of a set of branch windings is provided in each layer group. In any layer group, along the circumferential direction of the stator core, the portion of the branch winding is arranged in the corresponding slot of the branch winding in each magnetic pole of the layer group. Each magnetic pole in the layer group has a slot that constitutes the branch winding. For example, the stator winding has n magnetic poles, and each group of branch windings has two parallel branch windings. Therefore, each group of branch windings is located in two adjacent slots in each magnetic pole. In the first layer of the stator core in the radial direction, the group of branch windings is wound sequentially along the circumferential direction of the stator core. Each slot in the n magnetic poles contains a slot for the group of branch windings. When the group of branch windings is wound, it enters the corresponding slot of the first magnetic pole along the circumferential direction of the stator core, exits from the corresponding slot of the first magnetic pole, enters the corresponding slot of the second magnetic pole, exits from the corresponding slot of the second magnetic pole, enters the corresponding slot of the third magnetic pole, and so on, until it enters the corresponding slot of the nth magnetic pole. After exiting from the corresponding slot of the nth magnetic pole, it enters the next layer, and the same winding is performed in this layer, then it enters the next layer, and so on, until the last layer is completed, forming a group of branch windings.

[0037] Within each layer group, adjacent two groups of branch windings are provided with at least one cross position 5. At the cross position 5, the adjacent two groups of branch windings are cross-set and layer exchange is performed. There are multiple cross positions 5. Thus, the adjacent two groups of branch windings perform multiple cross-layer exchange and cross-wiring so that multiple groups of branch windings can be set within each layer group. Each group of branch windings is arranged in each magnetic pole of the layer group.

[0038] Within each layer group, adjacent branch windings exchange their layer positions at cross position 5, moving from their current layer to the adjacent layer, forming a cross structure. For example, in any layer group, along the circumferential direction of the stator core, in two adjacent branch windings, a portion of the first branch winding is wound on the first layer, and a portion of the second branch winding is wound on the second layer. Then, the two branch windings cross-exchange layers, with the second branch winding moving to the first layer and the first branch winding moving to the second layer. The position where the two sets of branch windings cross-change layers is called cross position 5. At cross position 5, the two sets of branch windings are arranged in an X-shape. When the windings are wound along the circumferential direction of the stator core to the second cross position 5, the two sets of branch windings cross-change layers again. The first set of branch windings enters the first layer of winding, and the second set of branch windings enters the second layer of winding. The winding continues until the two sets of branch windings enter the next layer group. The winding continues in the same way until the winding of the last layer group is completed. Cross-change layers are performed at least once in each layer group.

[0039] Within each layer group, each branch winding is wound in two adjacent layers. Two adjacent branch windings are wound in the same two adjacent layers. Two adjacent branch windings exchange their layer positions at cross position 5 and enter another adjacent layer from their current layer. The number of layers in each layer group and the number of cross positions 5 between two adjacent branch windings are selected according to actual needs, and no specific requirements are made here.

[0040] When two adjacent sets of branch windings are wound in the same layer, along the circumferential direction of the stator core, portions of each set of branch windings between two adjacent intersection positions 5 are located in the same layer. The portions of each branch winding located on either side of any intersection position 5 are located in adjacent layers. Layer switching occurs at intersection position 5, and corresponding portions of two adjacent sets of branch windings between two adjacent intersection positions 5 are located in different layers. Along the radial direction of the stator core, in each layer within the same slot of the stator core, the slots of adjacent layers are the slots of different sets of branch windings. Within the same layer within the same slot of the stator core, the slots of each branch winding constituting that set of branch windings are sequentially arranged. Each layer within that set of branch windings has one slot containing one set of branch windings.

[0041] Each branch winding is formed by winding a single conductor, creating a continuous winding structure. During winding, each branch winding is configured such that, within each layer, the conductor is sequentially passed through the corresponding slots in each magnetic pole along the circumferential direction of the stator core, and wound in an S-shape along the axial direction of the stator core. That is, each branch winding is first wound in the first layer along the radial direction of the stator core. Within the first layer, the conductor is sequentially passed through the corresponding slots in each magnetic pole of that branch winding along the circumferential direction of the stator core. Specifically, the two axial ends of the stator core are designated as ends A and B. During winding, the conductor enters from end A of the first slot and exits from end B of the first slot. Extending circumferentially along the stator core, the conductor enters from the axial end B of the second slot and extends from the axial end A of the second slot. Extending circumferentially along the stator core, the conductor enters from the axial end A of the third slot and extends from the axial end B of the third slot, and so on, until the conductor extends from the last slot and enters the second layer group (in each layer group, the slots through which the conductor passes are located in the corresponding magnetic poles). The conductor is wound in the second layer group in the same way as it was wound in the first layer group. After extending from the second layer group, it enters the third layer group, and so on, until the conductor enters the last layer group, is wound in the last layer group, and extends from the last slot of that layer group, forming a branch winding structure.

[0042] In the structure of each branch winding, the branch winding has multiple slots and multiple bends. The slots of two adjacent branches are connected at the same end of the stator core through a bend, forming a roughly wavy continuous winding structure. When each branch winding is wound in each layer group, it changes layers at the cross position 5, moving from the current layer to another adjacent layer. At the next cross position 5, it changes layers again, returning to the previous layer (e.g., changing from layer A to layer B, then changing from layer B to layer A at the next cross position 5, and so on, performing multiple cross layer changes). The conductors perform multiple cross layer changes along the radial direction of the stator core in adjacent layers.

[0043] Depending on the winding configuration of any branch winding, a layer change is performed at the intersection point 5, such as... Figure 1-4 As shown, within any magnetic pole, along the radial direction of the stator core, any branch winding is arranged with a layer of spacing. Within each layer of the same slot along the radial direction of the stator core, the slot interiors of that branch winding are spaced apart. For example, the first layer has one slot interior, the third layer has one slot interior, the fifth layer has one slot interior, ..., the second layer has no slot interiors, the fourth layer has no slot interiors, ..., multiple slot interiors are arranged with a layer of spacing. Or, as... Figure 5As shown, within any magnetic pole, along the radial direction of the stator core, a portion of any branch winding is arranged adjacently, while the remaining portion is arranged with a layer between them. Within each layer along the radial direction of the stator core in the same slot, a portion of the slot of that branch winding is arranged adjacently inside the slot, while the remaining portion is arranged with a layer between them. For example, the first layer does not have a slot inside, the second layer does have a slot inside, the third layer does not have a slot inside, the fourth layer does have a slot inside, the fifth layer does have a slot inside, and the sixth layer does not have a slot inside. The slot inside the second layer and the slot inside the fourth layer are arranged with a layer between them, and the slot inside the fourth layer and the slot inside the fifth layer are arranged adjacently.

[0044] Within each layer group, the location of any cross position 5 of two adjacent branch windings can be located within any magnetic pole. The number of cross positions 5 of two adjacent branch windings can be multiple, and these multiple cross positions 5 are located within different magnetic poles. The location and number of cross positions 5 of two adjacent branch windings are selected and set according to actual needs. Along the radial direction of the stator core, in any magnetic pole where a cross position 5 is set, at least one layer group has a cross position 5 of two adjacent branch windings. That is, in any magnetic pole where a cross position 5 is set, one layer group has a cross position 5 of two adjacent branch windings, or two layer groups have a cross position 5 of two adjacent branch windings, or all layer groups have a cross position 5 of two adjacent branch windings. The location of the cross position 5 within each layer group is selected and set accordingly.

[0045] Along the radial direction of the stator core, when there are cross positions in two or more layers within a magnetic pole, any branch winding at the corresponding cross position 5 in each layer can be located in the same slot of the same magnetic pole or in different slots of different magnetic poles, depending on actual needs. In some feasible embodiments, along the radial direction of the stator core, the corresponding cross positions 5 of any branch winding in each layer group are all located in the same slot of the same magnetic pole. When any branch winding is wound, at least one cross-layer change is performed in each layer group, and the cross positions 5 of each layer group are located in different layers of the same slot in the same magnetic pole; or, a portion of the corresponding cross positions 5 of any branch winding in each layer group are located in one slot of a magnetic pole, and another portion is located in a slot adjacent to that slot in the same magnetic pole. When any branch winding is wound, at least one cross-layer change is performed in each layer group. Along the radial direction of the stator core, in the first layer group to the i-th layer group, the cross positions 5 of each layer group are located in different layers of the same slot in the same magnetic pole. In the (i+1)-th layer group to the last layer group, the cross positions 5 of each layer group are located in different layers of another slot in the same magnetic pole. The slots of the two sets of cross positions 5 are arranged adjacently along the circumferential direction of the stator core, located in two adjacent slots.

[0046] According to the winding method of each branch winding, one end of the conductor constituting a branch winding enters from one radial side of the stator core and extends from the other radial side of the stator core. The two ends of each branch winding (the two ends being the input and output ends of the branch winding) are located on the radial sides of the stator core, respectively. Preferably, the two ends of each branch winding (the two ends being the input and output ends of the branch winding) are located in the innermost and outermost radial layers of the stator core, respectively, and the two ends of the branch winding are located in two adjacent magnetic poles, filling the corresponding slots of each layer group.

[0047] Within any two adjacent magnetic poles, in one magnetic pole, a set of corresponding turns of any group of branch windings is arranged in an enclosing configuration, and in the other magnetic pole, another set of corresponding turns of the same group of branch windings is arranged in an enclosing configuration, with the enclosing configurations of the two sets of corresponding turns being opposite. For any two adjacent magnetic poles, within one magnetic pole, in each layer group, a set of corresponding turns of any group of branch windings is arranged in an enclosing configuration, and along the radial direction of the stator core, the pitch of the corresponding turns of each branch winding constituting this group of branch windings gradually increases. Within the other magnetic pole, in each layer group, another set of corresponding turns of the same group of branch windings is arranged in an enclosing configuration, and along the same radial direction of the stator core, the pitch of the corresponding turns of each branch winding constituting this group of branch windings gradually decreases. For example, a set of branch windings includes a first branch winding 1 and a second branch winding 2. In pole 01, the pitch of the bend of the first branch winding 1 is greater than the pitch of the corresponding bend of the second branch winding 2, and the bend of the first branch winding 1 surrounds the outside of the corresponding bend of the second branch winding 2. In pole 02, the pitch of the bend of the first branch winding 1 is less than the pitch of the corresponding bend of the second branch winding 2, and the bend of the first branch winding 1 is surrounded by the corresponding bend of the second branch winding 2, with the surrounding method being reversed.

[0048] The radial number of the stator core mentioned above is an even number of layers greater than or equal to 6. The selection is based on actual needs and no specific requirements are made here.

[0049] A stator comprising, as described above, a continuous stator winding for an electric motor.

[0050] An electric motor, comprising a stator as described above.

[0051] The following describes some specific embodiments.

[0052] Example 1

[0053] like Figure 1As shown, in this embodiment, the stator winding includes a three-phase winding, the stator core has 96 slots, with 2 slots per pole per phase, each slot of the stator core has 6 layers in the radial direction, the stator winding has 4 parallel branches, and has 16 magnetic poles. Figure 1 In the diagram, each circle represents the interior of a conductor within a slot, and the dashed lines represent a radial layer of the stator core.

[0054] In this embodiment, the four parallel branches of the stator winding are wound from the radial inner layer to the radial outer layer of the stator core. The four parallel branches include a first branch winding 1, a second branch winding 2, a third branch winding 3, and a fourth branch winding 4. The first branch winding 1 and the second branch winding 2 form a first group of branch windings, which are arranged in adjacent slots along the circumferential direction of the stator core. The third branch winding 3 and the fourth branch winding 4 form a second group of branch windings, which are also arranged in adjacent slots along the circumferential direction of the stator core. Within the first branch winding, the input terminals of the first branch winding and the second branch winding are located within two adjacent magnetic poles. For example, the input terminal of the first branch winding is located within magnetic pole 01, and the input terminal of the second branch winding is located within magnetic pole 02. The output terminals of the first branch winding and the second branch winding are located within two adjacent magnetic poles. For example, the output terminal of the first branch winding is located within magnetic pole 16, and the output terminal of the second branch winding is located within magnetic pole 01. The input and output terminals of the first branch winding and the second branch winding are located within two adjacent magnetic poles.

[0055] The stator core has 6 layers in the radial direction of one slot, which are set into 3 layer groups. Each layer group has two layers: layer 01 and layer 02 are the first layer group, layer 03 and layer 04 are the second layer group, and layer 05 and layer 06 are the third layer group.

[0056] The first branch winding 1 is formed by winding a single conductor sequentially along the circumferential and radial directions of the stator core, creating a continuous winding structure. The axial ends of the stator core are designated as ends A and B. At the start of winding, the conductor's path within the first layer is as follows: entering from end B at position a of layer a (pole 01), extending from end A at position a of layer a (pole 01) to end A at position b of layer b (pole 02), extending from end B at position b of layer b (pole 02) to end B at position a of layer a (pole 03), extending from end A at position a of layer a (pole 03) to end A at position b of layer b (pole 04), extending from end B at position b of layer b (pole 04) to end B at position a of layer a (pole 05), extending from end A at position a of layer a (pole 05) to end A at position b of layer b (pole 06), extending from end B at position b of layer b (pole 06) to end B at position a of layer a (pole 07), extending from end A at position a of layer a (pole 07) to end B at position a of layer a (pole 07). The A end of position 08, layer 01, b extends from the B end of position 08, layer 01, b into the B end of position 09, layer 01, a; the A end of position 09, layer 01, a extends into the A end of position 10, layer 01, b; the B end of position 10, layer 01, b extends into the B end of position 11, layer 01, a extends into the A end of position 12, layer 01, b; the B end of position 12, layer 01, b extends into the B end of position 13, layer 02, a; the A end of position 13, layer 02, a extends into the A end of position 14, layer 02, b; the B end of position 14, layer 02, b extends into the B end of position 15, layer 02, a; the A end of position 15, layer 02, a extends into the A end of position 16, layer 02, b.

[0057] In the second layer group, the pole extends from end B at position b of layer 02 of pole 16 into end B of position a of layer 03 of pole 01; from end A of position a of layer 03 of pole 01 into end A of position b of layer 04 of pole 02; from end B of position b of layer 04 of pole 02 into end B of position a of layer 04 of pole 03; from end A of position a of layer 04 of pole 03 into end A of position b of layer 04 of pole 04; from end B of position b of layer 04 of pole 04 into end B of position a of layer 04 of pole 05; from end A of position a of layer 04 of pole 05 into end A of position b of layer 03 of pole 06; from end B of position b of layer 03 of pole 06 into end B of position a of layer 03 of pole 07; from end A of position a of layer 03 of pole 07 into end b of layer 03 of pole 08. End A extends from End B at position b of layer 03 of pole 08 into End B at position a of layer 03 of pole 09, from End A at position a of layer 03 of pole 09 into End A at position b of layer 10, from End B at position b of layer 10 into End B at position a of layer 03 of pole 11, from End A at position a of layer 03 of pole 11 into End A at position b of layer 12, from End B at position b of layer 12 into End B at position a of layer 04 of pole 13, from End A at position a of layer 04 of pole 13 into End A at position b of layer 14, from End B at position b of layer 14 into End B at position a of layer 04 of pole 15, from End A at position a of layer 04 of pole 15 into End A at position b of layer 16.

[0058] In the third layer group, the pole extends from end B at position b of layer 04 of pole 16 into end B of position a of layer 05 of pole 01; from end A of position a of layer 05 of pole 01 into end A of position b of layer 02 of pole 06; from end B of position b of layer 02 of pole 06 into end B of position a of layer 06 of pole 03; from end A of position a of layer 06 of pole 03 into end A of position b of layer 06 of pole 04; from end B of position b of layer 06 of pole 04 into end B of position a of layer 05 of pole 06; from end A of position a of layer 06 of pole 05 into end A of position b of layer 06 of pole 06; from end B of position b of layer 05 of pole 06 into end B of position a of layer 05 of pole 07; from end A of position a of layer 05 of pole 07 into end A of position b of layer 08; from end B of position b of layer 05 of pole 08... The B end extends into the B end of position 09 pole 05 layer a, and extends from the A end of position 09 pole 05 layer a into the A end of position 10 pole 05 layer b, and extends from the B end of position 10 pole 05 layer b into the B end of position 11 pole 05 layer a, and extends from the A end of position 11 pole 05 layer a into the A end of position 12 pole 05 layer b, and extends from the B end of position 12 pole 05 layer b into the B end of position 13 pole 06 layer a, and extends from the A end of position 13 pole 06 layer a into the A end of position 14 pole 06 layer b, and extends from the B end of position 14 pole 06 layer b into the B end of position 15 pole 06 layer a, and extends from the A end of position 15 pole 06 layer a into the A end of position 16 pole 06 layer b, forming the first branch winding 1 structure.

[0059] The incoming terminal of the first branch winding 1 is located at position a of pole 01 in the first layer, and the outgoing terminal is located at position b of pole 16 in the sixth layer.

[0060] Similarly, the winding method of the second branch winding 2 is the same as that of the first branch winding 1, except that the slots where each magnetic pole is located are different. The input end of the second branch winding 2 is located at position b of pole 01 in the first layer, and the output end is located at position a of pole 16 in the sixth layer. The second branch winding 2 and the first branch winding 1 are located in adjacent slots. The specific winding method of the second branch winding 2 will not be described here.

[0061] Similarly, the winding method of the third branch winding 3 is the same as that of the first branch winding 1, except that the slots and layers where each magnetic pole is located are different, and the magnetic poles where the input and output ends are located are different. The input end of the third branch winding 3 is located at position a of pole 02 in the first layer, and the output end is located at position b of pole 01 in the sixth layer. The input end of the third branch winding 3 and the input end of the first branch winding 1 are located in adjacent magnetic poles. The specific winding method of the third branch winding 3 will not be described here.

[0062] Similarly, the winding method of the fourth branch winding 4 is the same as that of the first branch winding 1, except that the slots and layers where each magnetic pole is located are different, and the magnetic poles where the input and output ends are located are different. The input end of the fourth branch winding 4 is located at position b of pole 02 in the first layer, and the output end is located at position a of pole 01 in the sixth layer. The input end of the fourth branch winding 4 and the input end of the first branch winding 1 are located in adjacent magnetic poles. The specific winding method of the fourth branch winding 4 will not be described here.

[0063] Example 2

[0064] like Figure 2 As shown, the difference between this embodiment and Embodiment 1 is that the radial number of the stator core is 12 layers, while the rest of the settings are the same, and will not be described again here.

[0065] Example 3

[0066] like Figure 3 As shown, the difference between this embodiment and Embodiment 1 is that the slots of each conductor layer from 01 to 03 are shifted counterclockwise by one slot relative to the slots of each conductor layer from 04 to 06 along the circumferential direction of the stator core. The rest of the settings are the same and will not be described in detail here.

[0067] Example 4

[0068] like Figure 4 As shown, the difference between this embodiment and embodiment two is that the slots of each conductor layer from layer 01 to layer 06 are shifted counterclockwise by one slot relative to the slots of each conductor layer from layer 07 to layer 12 along the circumferential direction of the stator core. The rest of the settings are the same and will not be described in detail here.

[0069] Example 5

[0070] like Figure 5 As shown, the difference between this embodiment and embodiment one is that the intersection position 5 of the first branch winding and the second branch winding in the 05 magnetic pole is different, and the intersection position 5 of the first branch winding and the second branch winding in the 12 magnetic pole is different.

[0071] In this embodiment, during the winding of the first branch winding 1, the two axial ends of the stator core are set as ends A and B, respectively. At the start of winding, the conductor's path within the first layer group is as follows: it enters from end B at position a of 01 pole layer 01, extends from end A at position a of 01 pole layer 01 to end A at position b of 02 pole layer 02, extends from end B at position b of 02 pole layer 02 to end B at position a of 03 pole layer 02, extends from end A at position a of 03 pole layer 02 to end A at position b of 04 pole layer 02, extends from end B at position b of 04 pole layer 02 to end B at position a of 05 pole layer 02, extends from end A at position a of 05 pole layer 02 to end A at position b of 06 pole layer 01, extends from end B at position b of 06 pole layer 01 to end B at position a of 07 pole layer 01, and extends from end a of 07 pole layer 01 to end a of 06 pole layer 01. The A end of position extends into the A end of position 08, layer 01, b; the B end of position 08, layer 01, b extends into the B end of position 09, layer 01, a; the A end of position 09, layer 01, a extends into the A end of position 10, layer 01, b extends into the B end of position 11, layer 01, a extends into the A end of position 12, layer 01, b extends into the B end of position 12, layer 01, b extends into the B end of position 13, layer 02, a extends into the A end of position 14, layer 02, b extends into the B end of position 15, layer 02, a extends into the A end of position 16, layer 02, a extends into the B end of position 16;

[0072] In the second layer group, the pole extends from end B at position b of layer 02 of pole 16 into end B of position a of layer 03 of pole 01; from end A of position a of layer 03 of pole 01 into end A of position b of layer 04 of pole 02; from end B of position b of layer 04 of pole 02 into end B of position a of layer 04 of pole 03; from end A of position a of layer 04 of pole 03 into end A of position b of layer 04 of pole 04; from end B of position b of layer 04 of pole 04 into end B of position a of layer 04 of pole 05; from end A of position a of layer 04 of pole 05 into end A of position b of layer 03 of pole 06; from end B of position b of layer 03 of pole 06 into end B of position a of layer 03 of pole 07; from end A of position a of layer 03 of pole 07 into end b of layer 03 of pole 08. End A extends from End B at position b of layer 03 of pole 08 into End B at position a of layer 03 of pole 09, from End A at position a of layer 03 of pole 09 into End A at position b of layer 10, from End B at position b of layer 10 into End B at position a of layer 03 of pole 11, from End A at position a of layer 03 of pole 11 into End A at position b of layer 12, from End B at position b of layer 12 into End B at position a of layer 04 of pole 13, from End A at position a of layer 04 of pole 13 into End A at position b of layer 14, from End B at position b of layer 14 into End B at position a of layer 04 of pole 15, from End A at position a of layer 04 of pole 15 into End A at position b of layer 16.

[0073] In the third layer group, the pole extends from end B at position b of layer 04 of pole 16 into end B of position a of layer 05 of pole 01; from end A of position a of layer 05 of pole 01 into end A of position b of layer 02 of pole 06; from end B of position b of layer 02 of pole 06 into end B of position a of layer 06 of pole 03; from end A of position a of layer 06 of pole 03 into end A of position b of layer 06 of pole 04; from end B of position b of layer 06 of pole 04 into end B of position a of layer 05 of pole 06; from end A of position a of layer 06 of pole 05 into end A of position b of layer 06 of pole 06; from end B of position b of layer 06 of pole 06 into end B of position a of layer 05 of pole 07; from end A of position a of layer 05 of pole 07 into end A of position b of layer 08; from end B of position b of layer 05 of pole 08... The B end extends into the B end of position 09 pole 05 layer a, and extends from the A end of position 09 pole 05 layer a into the A end of position 10 pole 05 layer b, and extends from the B end of position 10 pole 05 layer b into the B end of position 11 pole 05 layer a, and extends from the A end of position 11 pole 05 layer a into the A end of position 12 pole 05 layer b, and extends from the B end of position 12 pole 05 layer b into the B end of position 13 pole 05 layer a, and extends from the A end of position 13 pole 06 layer a into the A end of position 14 pole 06 layer b, and extends from the B end of position 14 pole 06 layer b into the B end of position 15 pole 06 layer a, and extends from the A end of position 15 pole 06 layer a into the A end of position 16 pole 06 layer b, forming the first branch winding 1 structure.

[0074] The incoming terminal of the first branch winding 1 is located at position a of pole 01 in the first layer, and the outgoing terminal is located at position b of pole 16 in the sixth layer.

[0075] Similarly, the winding method of the second branch winding 2 is the same as that of the first branch winding 1, except that the slots where each magnetic pole is located are different. The input end of the second branch winding 2 is located at position b of pole 01 in the first layer, and the output end is located at position a of pole 16 in the sixth layer. The second branch winding 2 and the first branch winding 1 are located in adjacent slots. The specific winding method of the second branch winding 2 will not be described here.

[0076] Similarly, the winding method of the third branch winding 3 is the same as that of the first branch winding 1, except that the slots and layers where each magnetic pole is located are different, and the magnetic poles where the input and output ends are located are different. The input end of the third branch winding 3 is located at position a of pole 02 in the first layer, and the output end is located at position b of pole 01 in the sixth layer. The input end of the third branch winding 3 and the input end of the first branch winding 1 are located in adjacent magnetic poles. The specific winding method of the third branch winding 3 will not be described here.

[0077] Similarly, the winding method of the fourth branch winding 4 is the same as that of the first branch winding 1, except that the slots and layers where each magnetic pole is located are different, and the magnetic poles where the input and output ends are located are different. The input end of the fourth branch winding 4 is located at position b of pole 02 in the first layer, and the output end is located at position a of pole 01 in the sixth layer. The input end of the fourth branch winding 4 and the input end of the first branch winding 1 are located in adjacent magnetic poles. The specific winding method of the fourth branch winding 4 will not be described here.

[0078] Due to the adoption of the above technical solution, the continuous stator winding of this motor has a continuous winding structure. Both ends of the stator winding are continuous structures without welding, and the connection has no solder joints. Compared with the space occupied by the axial ends of the stator winding connected by welding, the axial length of the stator core is reduced, and no insulation treatment is required at the connection. This results in high reliability, less copper usage, reduced material costs, and reduced copper loss. The stator winding has multiple sets of branch windings, and adjacent sets of branch windings have at least one cross position in each layer. When adjacent sets of branch windings are wound in a layer, they must cross and switch layers at least once. This allows multiple sets of branch windings to be set in each layer. The stator winding manufacturing process is simple and meets the performance requirements of the stator winding.

[0079] The embodiments of this utility model have been described in detail above, but the content described is only a preferred embodiment of this utility model and should not be considered as limiting the scope of implementation of this utility model. All equivalent changes and improvements made in accordance with the claims of this utility model should still fall within the patent coverage of this utility model.

Claims

1. A continuous stator winding of an electrical machine comprising a multiphase winding, characterized in that: Each phase winding includes multiple branch windings arranged in parallel. Each branch winding is a continuous winding structure. The multiple branch windings are set into multiple groups. Multiple branch windings in each group are arranged adjacent to each other. The corresponding ends of two adjacent groups of branch windings are located in adjacent magnetic poles. Multiple layers are arranged in each slot of the stator core along the radial direction of the stator core. Any one of the branch windings is arranged in each layer in sequence along the radial direction of the stator core, and in each layer, it is arranged in the corresponding slot of each magnetic pole in sequence along the circumferential direction of the stator core. Within each layer group, adjacent two groups of branch windings have at least one crossing position, at which the adjacent two groups of branch windings switch layers.

2. The continuous stator winding of an electrical machine according to claim 1, characterized in that: Each of the layer groups includes at least two adjacent layers. Within each of the layer groups, the two adjacent sets of branch windings exchange their layer positions at the crossover location, moving from the current layer to the next adjacent layer.

3. The continuous stator winding of an electrical machine according to claim 2, characterized in that: Along the circumferential direction of the stator core, each branch winding portion between two adjacent intersection positions is located on the same layer, and the portions of each branch winding located on both sides of any intersection position are located on two adjacent layers respectively, and the layers are switched at the intersection positions.

4. The continuous stator winding of an electrical machine according to any one of claims 1-3, characterized in that: Each of the branch windings is formed by winding a single conductor, and each of the branch windings is configured such that, in each layer group, the conductor is sequentially passed through the corresponding slot in each magnetic pole along the circumferential direction of the stator core and is wound in an S-shape in the axial direction of the stator core.

5. The continuous stator winding of the motor according to claim 4, characterized in that: Within any magnetic pole, along the radial direction of the stator core, any of the branch windings are arranged with one layer spaced apart, or a portion of any of the branch windings are arranged adjacent to each other, while the remaining portions are arranged with one layer spaced apart.

6. The continuous stator winding of an electrical machine according to any of claims 1-3 and 5, characterized in that: The intersection of two adjacent sets of branch windings is located within a portion of the magnetic pole. Along the radial direction of the stator core, the intersection of two adjacent sets of branch windings is located in at least one layer group within any magnetic pole where the intersection is located. The corresponding intersection of any branch winding in each layer group is located in the same slot of the same magnetic pole, or, a portion of the corresponding intersection of any branch winding in each layer group is located in a slot of a magnetic pole, and another portion is located in another slot adjacent to that slot within the same magnetic pole.

7. The continuous stator winding of an electrical machine according to claim 6, characterized in that: The two ends of each set of branch windings are located on the radial sides of the stator core, and the two ends of each set of branch windings are located within two adjacent magnetic poles.

8. The motor continuous stator winding of claim 1, wherein: The stator core has an even number of radial layers, which is greater than or equal to 6, and the branch windings have an even number of groups.

9. The motor continuous stator winding of claim 1, wherein: The number of slots per pole per phase is greater than or equal to 2.

10. A stator, characterized in that: Includes the continuous stator winding of the motor as described in any one of claims 1-9.

11. An electric machine characterized by: Includes the stator as described in claim 10.

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