Stator winding, stator and motor

Abstract

This invention provides a stator winding, a stator, and a motor. Each pole and each phase has three slots. Each phase winding includes a coil group one and a coil group two located in the innermost and outermost radial layers of the stator core. Coil group one includes multiple first conductor groups arranged sequentially along the circumference of the stator core, and coil group two includes second conductor groups arranged sequentially along the circumference of the stator core. At least one coil group three is located in two radially adjacent layers of the stator core, between coil group one and coil group two. Coil group three includes multiple third conductor groups arranged sequentially along the circumference of the stator core. Each phase winding includes three parallel branch windings. Multiple conductors in each branch winding located within the same magnetic pole of the stator winding are sequentially connected along the radial direction of the stator core. The magnetic circuit has a symmetrical structure, eliminating loop current problems, reducing the axial height of the stator winding, and improving processing efficiency.

Description

Technical Field

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

[0002] The stator winding of an electric motor includes multiple U-shaped conductors. These U-shaped conductors are arranged in a specific pattern and inserted into the slots of the stator core to form the required three-phase windings. In existing technology, taking a star-connected three-phase motor as an example, during operation, the potential at the output of each branch is equal to the external input voltage, while the potential at the star point is 0. The potential gradually changes from the output to the star point. Between the output and star points, the shorter the conductor length through which the current flows, the smaller the potential difference. In existing wave-winding motors, the conductor length through which the current flows between adjacent solder joints in each branch cannot be minimized, and it cannot be guaranteed that radially adjacent solder joints belong to the same branch. In high-voltage insulation technology, conventional methods to improve insulation levels and breakdown voltage include selecting insulation materials with higher dielectric constants or increasing the electrical clearance between conductors. However, the design dimensions and voltage platform of the motor must meet certain requirements, making increasing the clearance method impractical and hindering motor miniaturization. Using better insulation materials increases the cost of the motor. Summary of the Invention

[0003] In view of the above problems, the present invention provides a stator winding, a stator, and a 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 the present invention is: a stator winding, wherein the number of slots per pole per phase is 3, and any phase winding includes,

[0005] Coil group one and coil group two are located in the innermost and outermost radial layers of the stator core. Coil group one includes a plurality of first conductor groups arranged sequentially along the circumference of the stator core, and coil group two includes a second conductor group arranged sequentially along the circumference of the stator core.

[0006] At least one coil group three is disposed in two radially adjacent layers of the stator core, the coil group three is disposed between the coil group one and the coil group two, and the coil group three includes a plurality of third conductor groups arranged sequentially along the circumference of the stator core;

[0007] Each phase winding includes three parallel branch windings, and multiple conductors in each branch winding located in the same magnetic pole of the stator winding are connected sequentially along the radial direction of the stator core.

[0008] The first conductor group, the second conductor group, and the third conductor group each include three conductors located in adjacent slots. The pitches of the three conductors in the first conductor group, the second conductor group, and the third conductor group are either different or the same.

[0009] Furthermore, multiple conductors of each branch winding are connected sequentially along multiple magnetic poles of the stator winding, and are connected once sequentially along the radial direction of the same magnetic pole of the stator winding.

[0010] Furthermore, each branch winding is arranged in an S-shape and spans one full circle along the circumference of the stator core.

[0011] Furthermore, the conductors of corresponding pitch types in the first conductor group and the second conductor group are located in different slots of the stator core;

[0012] Along the same radial direction of the stator core, the slot occupied by the first conductor group is the same as the slot occupied by the second conductor group, or at least two slots are the same.

[0013] Furthermore, the multiple conductors arranged sequentially along the circumference of the stator core in the first conductor group are at least full-pitch conductors, long-pitch conductors, and short-pitch conductors, or the multiple conductors arranged sequentially along the circumference of the stator core in the first conductor group are full-pitch conductors.

[0014] Furthermore, the multiple conductors of the second conductor group arranged sequentially along the circumference of the stator core are at least long-pitch conductors, short-pitch conductors, and full-pitch conductors, or the multiple conductors of the second conductor group arranged sequentially along the circumference of the stator core are full-pitch conductors.

[0015] Furthermore, the multiple conductors arranged circumferentially along the stator core in the third conductor group are long-pitch conductors and / or short-pitch conductors and / or full-pitch conductors.

[0016] Furthermore, the full pitch is 9, the long pitch is 10, and the short pitch is 8.

[0017] Furthermore, the two welded ends of the conductors in the third conductor group extend along the circumferential direction of the stator core, with opposite directions and close to each other.

[0018] Furthermore, on the weld end side of any phase winding, the pitch between the two weld ends of the phase weld located in two radially adjacent layers of the stator core is a full pitch and / or a long pitch and / or a short pitch.

[0019] Furthermore, the stator core has an even number of radial layers, which is greater than or equal to 4.

[0020] Furthermore, in each branch winding, in the same radial direction of the stator core, the lead end is connected to a welded end of a conductor in the outermost layer or (outermost layer-1) layer, and the output end is connected to a welded end of a conductor in the (outermost layer-1) layer or the outermost layer.

[0021] A stator comprising stator windings as described above.

[0022] An electric motor, comprising a stator as described above.

[0023] Due to the adoption of the above technical solution, the conductor groups of coil group one and coil group two in the innermost and outermost radial layers of the stator core are arranged in the same layer. The conductor groups in the innermost and outermost radial layers have three different conductor pitches. The slot positions occupied by the three different pitch conductors in the innermost radial layer are different from those occupied by the three different pitch conductors in the outermost radial layer. Multiple coil groups three are arranged between the innermost and outermost radial layers, with the coil groups three arranged in two adjacent radial layers. The conductors in the coil groups three have the same pitch, or are groups of conductors with different pitches. In this design, on the welded end side of the stator winding, the pitch between corresponding welded ends of two radially adjacent layers can be long pitch, short pitch, or full pitch. Multiple conductors in each branch winding located within the same magnetic pole of the stator winding are sequentially connected along the radial direction of the stator core. These conductors are also sequentially connected along multiple magnetic poles of the stator winding, and are connected once along the radial direction of the same magnetic pole. Given the limitations of motor design space and voltage platform, this reduces the potential difference between two radially adjacent weld points, enhancing the overall insulation performance of the motor and improving its overall breakdown strength without increasing electrical clearance. With a smaller potential difference between adjacent weld points, air insulation can meet the dielectric strength requirements, allowing the removal of coating material from the weld points and thus reducing costs. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the first conductor group according to some embodiments of the present invention;

[0025] Figure 2 This is a schematic diagram of the structure of the second conductor group according to some embodiments of the present invention;

[0026] Figure 3 This is a schematic diagram of the structure of a third conductor group according to some embodiments of the present invention;

[0027] Figure 4 This is another structural schematic diagram of the third conductor group according to some embodiments of the present invention;

[0028] Figure 5 This is another structural schematic diagram of the third conductor group according to some embodiments of the present invention;

[0029] Figure 6 This is a planar unfolded structural diagram of the insertion end of a phase winding of Embodiment 1 of the present invention;

[0030] Figure 7This is a planar unfolded structural diagram of the welding end of a phase winding in Embodiment 1 of the present invention;

[0031] Figure 8 This is a planar unfolded structural diagram of the insertion end of a phase winding in Embodiment 2 of the present invention;

[0032] Figure 9 This is a planar unfolded structural diagram of the welding end of a phase winding in Embodiment 2 of the present invention;

[0033] Figure 10 This is a planar unfolded structural diagram of the insertion end of a phase winding in Embodiment 3 of the present invention;

[0034] Figure 11 This is a planar unfolded structural diagram of the welding end of a phase winding in Embodiment 3 of the present invention;

[0035] Figure 12 This is a planar unfolded structural diagram of the insertion end of a phase winding in Embodiment 4 of the present invention;

[0036] Figure 13 This is a planar unfolded structural diagram of the welding end of a phase winding in Embodiment 4 of the present invention;

[0037] Figure 14 This is a planar unfolded structural diagram of the insertion end of a phase winding in Embodiment 5 of the present invention;

[0038] Figure 15 This is a planar unfolded structural diagram of the welding end of a phase winding in Embodiment 5 of the present invention;

[0039] Figure 16 This is a planar unfolded structural diagram of the insertion end of a phase winding of a sixth embodiment of the present invention;

[0040] Figure 17 This is a planar unfolded structural diagram of the welding end of a phase winding in Embodiment Six of the present invention;

[0041] Figure 18 This is a planar unfolded structural diagram of the insertion end of a phase winding of Embodiment 7 of the present invention;

[0042] Figure 19 This is a planar unfolded structural diagram of the welding end of a phase winding in Embodiment 7 of the present invention;

[0043] Figure 20 This is a planar unfolded structural diagram of the insertion end of a phase winding of an embodiment eight of the present invention;

[0044] Figure 21 This is a planar unfolded structural diagram of the welding end of a phase winding in Embodiment 8 of the present invention;

[0045] Figure 22This is a planar unfolded structural diagram of the insertion end of a phase winding of embodiment nine of the present invention;

[0046] Figure 23 This is a planar unfolded structural diagram of the welding end of a phase winding in Embodiment 9 of the present invention;

[0047] Figure 24 This is a planar unfolded structural diagram of the insertion end of a phase winding of embodiment ten of the present invention;

[0048] Figure 25 This is a planar unfolded structural diagram of the welding end of a phase winding in Embodiment 10 of the present invention;

[0049] Figure 26 This is a planar unfolded structural diagram of the insertion end of a phase winding in Embodiment Eleven of the present invention;

[0050] Figure 27 This is a planar unfolded structural diagram of the welding end of a phase winding in Embodiment Eleven of the present invention;

[0051] Figure 28 This is a planar unfolded structural diagram of the plug-in end and welding end of a phase winding in Embodiment 1 of the present invention when they are combined together;

[0052] Figure 29 This is a planar unfolded structural diagram of the first branch winding of a phase winding according to Embodiment 1 of the present invention, when the insertion end and the welding end are combined together.

[0053] Figure 30 This is a planar unfolded structural diagram of the second branch winding of a phase winding of the present invention when the insertion end and the welding end are combined together;

[0054] Figure 31 This is a planar unfolded structural diagram of the third branch winding of a phase winding in Embodiment 1 of the present invention when the insertion end and the welding end are combined together.

[0055] Figure 32 This is a planar unfolded structural diagram of the insertion end of a phase winding in Embodiment Twelve of the present invention;

[0056] Figure 33 This is a planar unfolded structural diagram of the welding end of a phase winding in Embodiment Twelve of the present invention.

[0057] In the picture:

[0058] 10, First conductor group 20, Second conductor group 30, Third conductor group

[0059] 100. Long-pitch conductor; 101. Short-pitch conductor; 102. Full-pitch conductor Detailed Implementation

[0060] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0061] Figure 1-33 The diagram shows structural schematics of some embodiments of the present invention. This embodiment relates to a stator winding, a stator, and a motor. The branches of the stator winding adopt a symmetrical structure, which eliminates the loop current problem caused by the asymmetrical structure. In addition, the axial height of the stator winding is reduced, which simplifies the manufacturing process, reduces production costs, and improves processing efficiency.

[0062] A stator winding, comprising three-phase windings, such as Figure 1-7 As shown, the number of slots per pole per phase is 3, and any phase winding includes,

[0063] Coil group one and coil group two are located in the innermost and outermost radial layers of the stator core, respectively. Both coil group one and coil group two are arranged along the circumference of the stator core and in the same layer along the radial direction of the stator core. Coil group one is located in the innermost radial layer of the stator core, and coil group two is located in the outermost radial layer of the stator core, or coil group one is located in the outermost radial layer of the stator core, and coil group two is located in the innermost radial layer of the stator core. The arrangement is selected according to actual needs.

[0064] Coil group one includes multiple first conductor groups 10 arranged sequentially along the circumference of the stator core, and arranged in each slot of the innermost or outermost layer of the stator core occupied by the phase winding. Coil group two includes second conductor groups 20 arranged sequentially along the circumference of the stator core, and arranged in each slot of the outermost or innermost layer of the stator core occupied by the phase winding. Multiple first conductor groups 10 are arranged sequentially along the circumference of the stator core to form coil group one with a ring structure, and multiple second conductor groups 20 are arranged sequentially along the circumference of the stator core to form coil group two with a ring structure.

[0065] At least one coil group three is disposed in two radially adjacent layers of the stator core. The coil group three is arranged along the circumferential direction of the stator core. Along the radial direction of the stator core, the coil group three is disposed between the coil group one and the coil group two. There are multiple coil groups three, and multiple coil groups three are arranged sequentially along the radial direction of the stator core. The coil group three includes multiple third conductor groups 30 arranged sequentially along the circumference of the stator core. They are arranged in each slot of the two radially adjacent layers of the stator core occupied by the phase winding. The multiple third conductor groups 30 construct a ring-shaped coil group three.

[0066] The first conductor group 10, the second conductor group 20, and the third conductor group 30 each include at least three conductors located in adjacent slots. Multiple conductors are sequentially arranged in adjacent slots along the circumference of the stator core. The pitches of the multiple conductors in the first conductor group 10 may be different or the same; the pitches of the multiple conductors in the second conductor group 20 may be different or the same, depending on actual requirements; the pitches of the multiple conductors in the third conductor group 30 may be the same, partially the same, or different, depending on actual requirements.

[0067] The conductors in the first conductor group 10 can be of the same type, with their welded ends extending in the same circumferential direction along the stator core. Alternatively, the conductors in the first conductor group 10 can be of different types, with their welded ends extending in different circumferential directions along the stator core, depending on the actual requirements. The conductors in the second conductor group 20 can be of the same type, with their welded ends extending in the same circumferential direction along the stator core. Alternatively, the conductors in the second conductor group 20 can be of different types, with their welded ends extending in different circumferential directions along the stator core, depending on the actual requirements.

[0068] The multiple conductors in the third conductor group 30 can be conductors of the same type, with the welded ends of the multiple conductors extending in the same circumferential direction along the stator core. Alternatively, the multiple conductors in the third conductor group 30 can be conductors of different types, with the welded ends of the multiple conductors extending in different circumferential directions along the stator core, depending on the actual requirements.

[0069] In this embodiment, preferably, the welding ends of the plurality of conductors in the third conductor group 30 extend in opposite directions along the circumferential direction of the stator core and are close to each other.

[0070] The pitch type of multiple conductors in the first conductor group 10 is the same as that of multiple conductors in the second conductor group 20. The conductors with corresponding pitch types in the first conductor group 10 and the second conductor group 20 are located in different slots of the stator core.

[0071] like Figure 1 As shown, in coil group one, the conductors of the first conductor group 10 arranged sequentially along the circumference of the stator core are at least full-pitch conductor 102, long-pitch conductor 100 and short-pitch conductor 101. For example, the first conductor group 10 includes three conductors in three adjacent slots along the circumference of the stator core. The first slot contains the full-pitch conductor 102, the second slot contains the long-pitch conductor 100 and the third slot contains the short-pitch conductor 101.

[0072] The pitch of the full-pitch conductor 102 is 9, the pitch of the long-pitch conductor 100 is 10, and the pitch of the short-pitch conductor 101 is 8.

[0073] like Figure 2 As shown, in coil group two, the conductors of the second conductor group 20 arranged sequentially along the circumference of the stator core are at least long-pitch conductor 100, short-pitch conductor 101 and full-pitch conductor 102. For example, the first conductor group 10 includes three conductors in three adjacent slots along the circumference of the stator core. The first slot contains the long-pitch conductor 100, the second slot contains the short-pitch conductor 101, and the third slot contains the full-pitch conductor 102.

[0074] The conductors in the first conductor group 10 and the conductors in the second conductor group 20 both include long-pitch conductors 100, short-pitch conductors 101, and full-pitch conductors 102. However, for conductors of the same pitch, their positions in the slots of the stator core are different. That is, the full-pitch conductors 102 in the first conductor group 10 and the full-pitch conductors 102 in the second conductor group 20 are located in different slots of the positioning core. The long-pitch conductors 100 in the first conductor group 10 and the long-pitch conductors 100 in the second conductor group 20 are located in different slots of the positioning core. The short-pitch conductors 101 in the first conductor group 10 and the short-pitch conductors 101 in the second conductor group 20 are located in different slots of the positioning core. In the same slot along the radial direction of the stator core, the conductors inserted into the slot in the first conductor group 10 and the conductors inserted into the slot in the second conductor group 20 have different pitches.

[0075] Along the same radial direction of the stator core, the slot occupied by the first conductor group 10 is the same as the slot occupied by the second conductor group 20, such as... Figure 6 As shown, the three conductors of the first conductor group 10 and the three conductors of the second conductor group 20 occupy slots 01, 02, 03, 10, 11, and 12; or, the slots occupied by the first conductor group 10 and the slots occupied by the second conductor group 20 are at least two of the same, such as... Figure 8 As shown, the slots occupied by the three conductors of the first conductor group 10 are slots 01, 02, 03, 10, 11, and 12, and the slots occupied by the three conductors of the second conductor group 20 are slots 02, 03, 04, 11, 12, and 13.

[0076] like Figures 3-5As shown, the multiple conductors of the third conductor group 30 arranged along the circumference of the stator core are long-pitch conductors 100 and / or short-pitch conductors 101 and / or full-pitch conductors 102. The multiple conductors in the third conductor group 30 can all be long-pitch conductors 100, or the multiple conductors in the third conductor group 30 can all be short-pitch conductors 101, or the multiple conductors in the third conductor group 30 can all be full-pitch conductors 102, or the multiple conductors in the third conductor group 30 can include multiple long-pitch conductors 100 and multiple... The short-pitch conductor 101, or the multiple conductors in the third conductor group 30 may include multiple long-pitch conductors 100 and multiple full-pitch conductors 102, or the multiple conductors in the third conductor group 30 may include multiple full-pitch conductors 102 and multiple short-pitch conductors 101, or the multiple conductors in the third conductor group 30 may include multiple long-pitch conductors 100, multiple short-pitch conductors 101 and multiple full-pitch conductors 102, or other combinations, selected according to actual needs, without specific requirements here.

[0077] Multiple coil groups are arranged along the radial direction of the stator core. The conductor pitch in the third conductor group 30 of two adjacent coil groups can be the same or different, depending on the actual needs.

[0078] Along the axial direction of the stator core, on the welded end side of any phase winding, the pitch between the two welded ends of two radially adjacent layers of the stator core can be a full pitch, a long pitch, or a short pitch, selected according to actual needs; no specific requirements are specified here. Along the circumferential direction of the stator core, the pitch between the two welded ends of two adjacent layers is the same. Along the radial direction of the stator core, the pitch between the two welded ends of two adjacent layers can be different or the same, selected according to actual needs.

[0079] Along the radial direction of the stator core, multiple conductors in the first conductor group 10, the second conductor group 20, and the third conductor group 30 may be located in multiple adjacent slots corresponding to each other in the same radial direction. Alternatively, multiple conductors in the first conductor group 10, the second conductor group 20, and the third conductor group 30 may be located in multiple adjacent slots that are not completely corresponding to each other in the same radial direction, but may be located in multiple adjacent slots that are at least partially corresponding. The multiple adjacent slots occupied by the first conductor group 10, the second conductor group 20, and the third conductor group 30 are staggered from each other.

[0080] The number of radial layers in the stator core is an even number of layers greater than or equal to 4. The number of radial layers in the stator core is selected according to actual needs, and no specific requirements are given here.

[0081] In some embodiments, the number of slots per pole per phase of the stator winding is 3, and any phase winding includes 3 parallel branch windings. Multiple conductors of each branch winding located in the same magnetic pole of the stator winding are connected sequentially along the radial direction of the stator core. These multiple conductors can be connected sequentially from the outermost layer to the innermost layer, or they can be connected sequentially from the innermost layer to the outermost layer.

[0082] Multiple conductors in each branch winding are connected sequentially along multiple magnetic poles of the stator winding, and are connected once in the radial direction of the same magnetic pole of the stator winding. Each branch winding is arranged in an S-shape and spans one circumference of the stator core.

[0083] Each phase winding includes multiple branch windings. In each branch winding, the lead end is connected to a welded end of a conductor in the outermost layer or (outermost layer-1) in the same radial direction of the stator core, and the output end is connected to a welded end of a conductor in the (outermost layer-1) or outermost layer. The lead end and the output end are located at the outermost layer in the same radial direction of the stator core.

[0084] In each branch winding, along the circumferential direction of the stator core, there are multiple conductors located in the innermost radial layer of the first conductor group 10, multiple conductors located in the outermost radial layer of the second conductor group 20, and multiple conductors located in two adjacent radial layers of the third conductor group 30. In each branch winding, in coil group one, one conductor from each first conductor group 10 is located in that branch winding; in coil group two, one conductor from each second conductor group 20 is located in that branch winding; and in coil group three, one conductor from each third conductor group 30 is located in that branch winding, with the conductors in that branch winding being overlapped. At the welding end of the branch winding, two adjacent radial layers... The corresponding weld ends are connected; in the same radial direction of the stator core, from the outermost layer to the innermost layer, two adjacent corresponding weld ends are connected. Along the circumferential direction of the stator core, in the second radial direction adjacent to the first, from the innermost layer to the outermost layer, two adjacent corresponding weld ends are connected. In the third radial direction adjacent to the second, from the outermost layer to the innermost layer, two adjacent corresponding weld ends are connected, and so on, proceeding sequentially along the circumferential direction of the stator core. The weld ends of each conductor are connected sequentially to form the branch winding structure. Each branch winding is S-shaped and spans one revolution along the circumference of the stator core. Conversely, in the same radial direction of the stator core, from the innermost layer to the outermost layer, the connection method for two adjacent corresponding weld ends is the same.

[0085] In each branch winding, the other welded end of the first conductor connected to the lead end is connected to the corresponding welded end of the second conductor in the adjacent layer, the other welded end of the second conductor is connected to the corresponding welded end of the third conductor in the adjacent layer, the other welded end of the third conductor is connected to the welded end of the fourth conductor in the adjacent layer, ..., and the other welded end of the last conductor is connected to the outgoing end.

[0086] A stator comprising stator windings as described above.

[0087] An electric motor, comprising a stator as described above.

[0088] The following describes some specific embodiments.

[0089] In some of the embodiments described below, the stator windings are mounted on a stator core, which has multiple slots spaced apart at a predetermined slot pitch along the circumferential direction of the stator core. The stator windings include three-phase windings, each phase stator winding including multiple branch windings, with at least two slots per pole per phase. In some of the embodiments described below, each phase stator winding includes three branch windings, with three slots per pole per phase, and the stator core has 54 slots. The first conductor group 10, the second conductor group 20, and the third conductor group 30 each include three conductors.

[0090] Example 1

[0091] like Figures 6-7 and Figures 28-31 As shown, the stator core has four radial layers. Each phase winding of the stator winding includes coil group one, coil group two, and coil group three. Along the radial direction of the stator core, coil group one is located in the first radial layer of the stator core, coil group three is located in the second and third radial layers of the stator core, and coil group two is located in the fourth radial layer of the stator core.

[0092] In coil group one, three first conductor groups 10 are sequentially arranged along the circumferential direction of the stator core. Each first conductor group 10 has three conductors: the first conductor is a long-pitch conductor 100, the second conductor is a short-pitch conductor 101, and the third conductor is a full-pitch conductor 102. The three first conductor groups 10 are arranged sequentially along the circumferential direction of the stator core. In the first first conductor group 10, the long-pitch conductor 100 is located in slots 01 and 11 of the first layer, the short-pitch conductor 101 is located in slots 02 and 10 of the first layer, and the full-pitch conductor 102... Conductor 102 is located in slots 03 and 12 of the first layer. In the second first conductor group 10, long-pitch conductor 100 is located in slots 19 and 29 of the first layer, short-pitch conductor 101 is located in slots 20 and 28 of the first layer, and full-pitch conductor 102 is located in slots 21 and 30 of the first layer. In the third first conductor group 10, long-pitch conductor 100 is located in slots 37 and 47 of the first layer, short-pitch conductor 101 is located in slots 38 and 46 of the first layer, and full-pitch conductor 102 is located in slots 39 and 48 of the first layer.

[0093] In coil group two, three second conductor groups 20 are sequentially arranged along the circumferential direction of the stator core. Each second conductor group 20 has three conductors: the first conductor is a full-pitch conductor 102, the second conductor is a long-pitch conductor 100, and the third conductor is a short-pitch conductor 101. The three second conductor groups 20 are arranged sequentially along the circumferential direction of the stator core. In the first second conductor group 20, the full-pitch conductor 102 is located in slots 01 and 10 of the fourth layer, the long-pitch conductor 100 is located in slots 02 and 12 of the fourth layer, and the short-pitch conductor 101... Conductor 101 is located in slots 03 and 11 of the fourth layer; in the second second conductor group 20, the full-pitch conductor 102 is located in slots 19 and 28 of the fourth layer, the long-pitch conductor 100 is located in slots 20 and 30 of the fourth layer, and the short-pitch conductor 101 is located in slots 21 and 29 of the fourth layer; in the third second conductor group 20, the full-pitch conductor 102 is located in slots 37 and 46 of the fourth layer, the long-pitch conductor 100 is located in slots 38 and 48 of the fourth layer, and the short-pitch conductor 101 is located in slots 39 and 47 of the fourth layer.

[0094] In coil group three, six third conductor groups 30 are sequentially arranged along the circumferential direction of the stator core. Each third conductor group 30 has three conductors, all of which are full-pitch conductors 102. The three third conductor groups 30 are arranged sequentially along the circumferential direction of the stator core. In the first third conductor group 30, the first full-pitch conductor 102 is located in slot 01 of the third layer and slot 10 of the second layer; the second full-pitch conductor 102 is located in slot 02 of the third layer and slot 11 of the second layer; and the third full-pitch conductor 102 is located in slot 03 of the third layer and slot 12 of the second layer. In the second third conductor group 30, the first full-pitch conductor 102 is located in slot 10 of the third layer and slot 19 of the second layer; the second full-pitch conductor 102 is located in slot 11 of the third layer and slot 20 of the second layer; and the third full-pitch conductor 102 is located in slot 12 of the third layer and slot 21 of the second layer. In the third third conductor group 30, the first full-pitch conductor 102 is located in slot 19 of the third layer and slot 28 of the second layer; the second full-pitch conductor 102 is located in slot 03 of the third layer and slot 12 of the second layer. The third full-pitch conductor 102 is located in slot 20 of the third layer and slot 29 of the second layer; the third full-pitch conductor 102 is located in slot 21 of the third layer and slot 30 of the second layer; the first full-pitch conductor 102 in the fourth third conductor group 30 is located in slot 28 of the third layer and slot 37 of the second layer, the second full-pitch conductor 102 is located in slot 29 of the third layer and slot 38 of the second layer, and the third full-pitch conductor 102 is located in slot 30 of the third layer and slot 39 of the second layer; the first full-pitch conductor 102 in the fifth third conductor group 30 is located in slot 21 of the third layer and slot 30 of the second layer. The first full-pitch conductor 102 is located in slot 37 of the third layer and slot 46 of the second layer; the second full-pitch conductor 102 is located in slot 38 of the third layer and slot 47 of the second layer; the third full-pitch conductor 102 is located in slot 39 of the third layer and slot 48 of the second layer; the first full-pitch conductor 102 in the sixth third conductor group 30 is located in slot 46 of the third layer and slot 01 of the second layer; the second full-pitch conductor 102 is located in slot 47 of the third layer and slot 02 of the second layer; the third full-pitch conductor 102 is located in slot 48 of the third layer and slot 03 of the second layer.

[0095] On the welding end side of the phase winding, the two welding ends of the two corresponding conductors of the two radially adjacent layers are welded together. The pitch between the welding ends of the two phases is a whole pitch, which is 9.

[0096] Example 2

[0097] The difference between this embodiment and embodiment one is that the pitch of the conductors in the third conductor group 30 of coil group three is different, the slots in which the second conductor group 20 of coil group two is located are different, and the pitch between the two welding ends of the two corresponding conductors in the two adjacent layers on the welding end side is different.

[0098] In this embodiment, as Figure 8 and Figure 9As shown, in coil group two, three second conductor groups 20 are sequentially arranged along the circumferential direction of the stator core. Each second conductor group 20 has three conductors: the first conductor is a full-pitch conductor 102, the second conductor is a long-pitch conductor 100, and the third conductor is a short-pitch conductor 101. The three second conductor groups 20 are sequentially arranged along the circumferential direction of the stator core. In the first second conductor group 20, the full-pitch conductor 102 is located in slots 02 and 11 of the fourth layer, the long-pitch conductor 100 is located in slots 03 and 13 of the fourth layer, and the short-pitch conductor 101... The pitch conductor 101 is located in slots 04 and 12 of the fourth layer. The full pitch conductor 102 in the second second conductor group 20 is located in slots 20 and 29 of the fourth layer. The long pitch conductor 100 is located in slots 21 and 31 of the fourth layer. The short pitch conductor 101 is located in slots 22 and 30 of the fourth layer. The full pitch conductor 102 in the third second conductor group 20 is located in slots 38 and 47 of the fourth layer. The long pitch conductor 100 is located in slots 39 and 49 of the fourth layer. The short pitch conductor 101 is located in slots 40 and 48 of the fourth layer.

[0099] In coil group three, six third conductor groups 30 are sequentially arranged along the circumferential direction of the stator core. Each third conductor group 30 has three conductors, all of which are long-pitch conductors 100. The three third conductor groups 30 are arranged sequentially along the circumferential direction of the stator core. In the first third conductor group 30, the first long-pitch conductor 100 is located in slot 01 of the third layer and slot 11 of the second layer; the second long-pitch conductor 100 is located in slot 02 of the third layer and slot 12 of the second layer; and the third long-pitch conductor 100 is located in slot 03 of the third layer and slot 13 of the second layer. In the second third conductor group 30, the first long-pitch conductor 100 is located in slot 10 of the third layer and slot 20 of the second layer; the second long-pitch conductor 100 is located in slot 11 of the third layer and slot 21 of the second layer; and the third long-pitch conductor 100 is located in slot 12 of the third layer and slot 22 of the second layer. In the third third conductor group 30, the first long-pitch conductor 100 is located in slot 19 of the third layer and slot 29 of the second layer; and the second long-pitch conductor 100 is located in slot 01 of the third layer and slot 11 of the second layer. The third long-pitch conductor 100 is located in slot 21 of the third layer and slot 31 of the second layer in the third conductor group 30; the first long-pitch conductor 100 in the fourth third conductor group 30 is located in slot 28 of the third layer and slot 38 of the second layer, the second long-pitch conductor 100 is located in slot 29 of the third layer and slot 39 of the second layer, and the third long-pitch conductor 100 is located in slot 30 of the third layer and slot 40 of the second layer; the first long-pitch conductor 100 in the fifth third conductor group 30 is located in slot 20 of the third layer and slot 30 of the second layer. The first long-pitch conductor 100 is located in slot 37 of the third layer and slot 47 of the second layer; the second long-pitch conductor 100 is located in slot 38 of the third layer and slot 48 of the second layer; the third long-pitch conductor 100 is located in slot 39 of the third layer and slot 49 of the second layer; the first long-pitch conductor 100 in the sixth third conductor group 30 is located in slot 46 of the third layer and slot 02 of the second layer; the second long-pitch conductor 100 is located in slot 47 of the third layer and slot 03 of the second layer; the third long-pitch conductor 100 is located in slot 48 of the third layer and slot 04 of the second layer.

[0100] On the welding end side of the phase winding, the two welding ends of the two corresponding conductors of the two radially adjacent layers are welded together. The pitch between the welding ends of the two phases is a long pitch of 10.

[0101] The other structures are the same, so they will not be described in detail here.

[0102] Example 3

[0103] The difference between this embodiment and Embodiment 1 is that:

[0104] like Figure 10 and Figure 11As shown, in coil group one, three first conductor groups 10 are sequentially arranged along the circumferential direction of the stator core. Each first conductor group 10 has three conductors: the first conductor is a long-pitch conductor 100, the second conductor is a short-pitch conductor 101, and the third conductor is a full-pitch conductor 102. The three first conductor groups 10 are sequentially arranged along the circumferential direction of the stator core. In the first first conductor group 10, the long-pitch conductor 100 is located in slots 02 and 12 of the first layer, the short-pitch conductor 101 is located in slots 03 and 11 of the first layer, and the full-pitch conductor 102 is located in slots 03 and 11 of the first layer. The pitch conductor 102 is located in slots 04 and 13 of the first layer. The long pitch conductor 100 in the second first conductor group 10 is located in slots 20 and 30 of the first layer. The short pitch conductor 101 is located in slots 21 and 29 of the first layer. The full pitch conductor 102 is located in slots 22 and 31 of the first layer. The long pitch conductor 100 in the third first conductor group 10 is located in slots 38 and 48 of the first layer. The short pitch conductor 101 is located in slots 39 and 47 of the first layer. The full pitch conductor 102 is located in slots 40 and 49 of the first layer.

[0105] In coil group three, six third conductor groups 30 are sequentially arranged along the circumferential direction of the stator core. Each third conductor group 30 has three conductors, all of which are short-pitch conductors 101. The three third conductor groups 30 are arranged sequentially along the circumferential direction of the stator core. In the first third conductor group 30, the first short-pitch conductor 101 is located in slot 02 of the third layer and slot 10 of the second layer; the second short-pitch conductor 101 is located in slot 03 of the third layer and slot 11 of the second layer; and the third short-pitch conductor 101 is located in slot 04 of the third layer and slot 12 of the second layer. In the second third conductor group 30, the first short-pitch conductor 101 is located in slot 11 of the third layer and slot 19 of the second layer; the second short-pitch conductor 101 is located in slot 12 of the third layer and slot 20 of the second layer; and the third short-pitch conductor 101 is located in slot 13 of the third layer and slot 21 of the second layer. In the third third conductor group 30, the first short-pitch conductor 101 is located in slot 20 of the third layer and slot 28 of the second layer; and the second short-pitch conductor 101 is located in slot 04 of the third layer and slot 12 of the second layer. The third short-pitch conductor 101 is located in slot 21 of the third layer and slot 29 of the second layer; the third short-pitch conductor 101 is located in slot 22 of the third layer and slot 30 of the second layer; the first short-pitch conductor 101 in the fourth third conductor group 30 is located in slot 29 of the third layer and slot 37 of the second layer, the second short-pitch conductor 101 is located in slot 30 of the third layer and slot 38 of the second layer, and the third short-pitch conductor 101 is located in slot 31 of the third layer and slot 39 of the second layer; the first short-pitch conductor 101 in the fifth third conductor group 30 is located in slot 21 of the third layer and slot 29 of the second layer. The first short-pitch conductor 101 is located in slot 38 of the third layer and slot 46 of the second layer; the second short-pitch conductor 101 is located in slot 39 of the third layer and slot 47 of the second layer; the third short-pitch conductor 101 is located in slot 40 of the third layer and slot 48 of the second layer; the first short-pitch conductor 101 in the sixth third conductor group 30 is located in slot 47 of the third layer and slot 01 of the second layer; the second short-pitch conductor 101 is located in slot 48 of the third layer and slot 02 of the second layer; the third short-pitch conductor 101 is located in slot 49 of the third layer and slot 03 of the second layer.

[0106] On the welding end side of the phase winding, the two welding ends of the two corresponding conductors of the two radially adjacent layers are welded together. The pitch between the welding ends of the two phases is a short pitch of 8.

[0107] The other structures are the same, so they will not be described in detail here.

[0108] Example 4

[0109] The difference between this embodiment and the first embodiment is that:

[0110] like Figure 12 and Figure 13As shown, in coil group two, three second conductor groups 20 are sequentially arranged along the circumferential direction of the stator core. Each second conductor group 20 has three conductors: the first conductor is a full-pitch conductor 102, the second conductor is a long-pitch conductor 100, and the third conductor is a short-pitch conductor 101. The three second conductor groups 20 are sequentially arranged along the circumferential direction of the stator core. In the first second conductor group 20, the full-pitch conductor 102 is located in slots 02 and 11 of the fourth layer, the long-pitch conductor 100 is located in slots 03 and 13 of the fourth layer, and the short-pitch conductor 101... The pitch conductor 101 is located in slots 04 and 12 of the fourth layer. The full pitch conductor 102 in the second second conductor group 20 is located in slots 20 and 29 of the fourth layer. The long pitch conductor 100 is located in slots 21 and 31 of the fourth layer. The short pitch conductor 101 is located in slots 22 and 30 of the fourth layer. The full pitch conductor 102 in the third second conductor group 20 is located in slots 38 and 47 of the fourth layer. The long pitch conductor 100 is located in slots 39 and 49 of the fourth layer. The short pitch conductor 101 is located in slots 40 and 48 of the fourth layer.

[0111] In coil group three, six third conductor groups 30 are sequentially arranged along the circumferential direction of the stator core. Each third conductor group 30 has three conductors, all of which are short-pitch conductors 101. The three third conductor groups 30 are arranged sequentially along the circumferential direction of the stator core. In the first third conductor group 30, the first short-pitch conductor 101 is located in slot 02 of the third layer and slot 10 of the second layer; the second short-pitch conductor 101 is located in slot 03 of the third layer and slot 11 of the second layer; and the third short-pitch conductor 101 is located in slot 04 of the third layer and slot 12 of the second layer. In the second third conductor group 30, the first short-pitch conductor 101 is located in slot 11 of the third layer and slot 19 of the second layer; the second short-pitch conductor 101 is located in slot 12 of the third layer and slot 20 of the second layer; and the third short-pitch conductor 101 is located in slot 13 of the third layer and slot 21 of the second layer. In the third third conductor group 30, the first short-pitch conductor 101 is located in slot 20 of the third layer and slot 28 of the second layer; and the second short-pitch conductor 101 is located in slot 04 of the third layer and slot 12 of the second layer. The third short-pitch conductor 101 is located in slot 21 of the third layer and slot 29 of the second layer; the third short-pitch conductor 101 is located in slot 22 of the third layer and slot 30 of the second layer; the first short-pitch conductor 101 in the fourth third conductor group 30 is located in slot 29 of the third layer and slot 37 of the second layer, the second short-pitch conductor 101 is located in slot 30 of the third layer and slot 38 of the second layer, and the third short-pitch conductor 101 is located in slot 31 of the third layer and slot 39 of the second layer; the first short-pitch conductor 101 in the fifth third conductor group 30 is located in slot 21 of the third layer and slot 29 of the second layer. The first short-pitch conductor 101 is located in slot 38 of the third layer and slot 46 of the second layer; the second short-pitch conductor 101 is located in slot 39 of the third layer and slot 47 of the second layer; the third short-pitch conductor 101 is located in slot 40 of the third layer and slot 48 of the second layer; the first short-pitch conductor 101 in the sixth third conductor group 30 is located in slot 47 of the third layer and slot 01 of the second layer; the second short-pitch conductor 101 is located in slot 48 of the third layer and slot 02 of the second layer; the third short-pitch conductor 101 is located in slot 49 of the third layer and slot 03 of the second layer.

[0112] On the welding end side of the phase winding, the two welding ends of the two corresponding conductors of the two radially adjacent layers are welded together. The pitch between the welding ends of the two phases is a whole pitch, which is 9.

[0113] The other structures are the same, so they will not be described in detail here.

[0114] Example 5

[0115] The difference between this embodiment and the first embodiment is that:

[0116] like Figure 14 and Figure 15As shown, in coil group one, three first conductor groups 10 are sequentially arranged along the circumferential direction of the stator core. Each first conductor group 10 has three conductors: the first conductor is a long-pitch conductor 100, the second conductor is a short-pitch conductor 101, and the third conductor is a full-pitch conductor 102. The three first conductor groups 10 are sequentially arranged along the circumferential direction of the stator core. In the first first conductor group 10, the long-pitch conductor 100 is located in slots 02 and 12 of the first layer, the short-pitch conductor 101 is located in slots 03 and 11 of the first layer, and the full-pitch conductor 102 is located in slots 03 and 11 of the first layer. The pitch conductor 102 is located in slots 04 and 13 of the first layer. The long pitch conductor 100 in the second first conductor group 10 is located in slots 20 and 30 of the first layer. The short pitch conductor 101 is located in slots 21 and 29 of the first layer. The full pitch conductor 102 is located in slots 22 and 31 of the first layer. The long pitch conductor 100 in the third first conductor group 10 is located in slots 38 and 48 of the first layer. The short pitch conductor 101 is located in slots 39 and 47 of the first layer. The full pitch conductor 102 is located in slots 40 and 49 of the first layer.

[0117] In coil group three, six third conductor groups 30 are sequentially arranged along the circumferential direction of the stator core. Each third conductor group 30 has three conductors, all of which are long-pitch conductors 100. The three third conductor groups 30 are arranged sequentially along the circumferential direction of the stator core. In the first third conductor group 30, the first long-pitch conductor 100 is located in slot 01 of the third layer and slot 11 of the second layer; the second long-pitch conductor 100 is located in slot 02 of the third layer and slot 12 of the second layer; and the third long-pitch conductor 100 is located in slot 03 of the third layer and slot 13 of the second layer. In the second third conductor group 30, the first long-pitch conductor 100 is located in slot 10 of the third layer and slot 20 of the second layer; the second long-pitch conductor 100 is located in slot 11 of the third layer and slot 21 of the second layer; and the third long-pitch conductor 100 is located in slot 12 of the third layer and slot 22 of the second layer. In the third third conductor group 30, the first long-pitch conductor 100 is located in slot 19 of the third layer and slot 29 of the second layer; and the second long-pitch conductor 100 is located in slot 01 of the third layer and slot 11 of the second layer. The third long-pitch conductor 100 is located in slot 21 of the third layer and slot 31 of the second layer in the third conductor group 30; the first long-pitch conductor 100 in the fourth third conductor group 30 is located in slot 28 of the third layer and slot 38 of the second layer, the second long-pitch conductor 100 is located in slot 29 of the third layer and slot 39 of the second layer, and the third long-pitch conductor 100 is located in slot 30 of the third layer and slot 40 of the second layer; the first long-pitch conductor 100 in the fifth third conductor group 30 is located in slot 20 of the third layer and slot 30 of the second layer. The first long-pitch conductor 100 is located in slot 37 of the third layer and slot 47 of the second layer; the second long-pitch conductor 100 is located in slot 38 of the third layer and slot 48 of the second layer; the third long-pitch conductor 100 is located in slot 39 of the third layer and slot 49 of the second layer; the first long-pitch conductor 100 in the sixth third conductor group 30 is located in slot 46 of the third layer and slot 02 of the second layer; the second long-pitch conductor 100 is located in slot 47 of the third layer and slot 03 of the second layer; the third long-pitch conductor 100 is located in slot 48 of the third layer and slot 04 of the second layer.

[0118] On the welding end side of the phase winding, the two welding ends of the two corresponding conductors of the two radially adjacent layers are welded together. The pitch between the welding ends of the two phases is a whole pitch, which is 9.

[0119] The other structures are the same, so they will not be described in detail here.

[0120] Example 6

[0121] like Figure 16 and Figure 17As shown, the stator core has six radial layers. Each phase winding of the stator winding includes coil group one, coil group two, and two coil groups three. Along the radial direction of the stator core, coil group one is located in the first radial layer of the stator core, coil group three is located in the second, third, fourth, and fifth radial layers of the stator core, and coil group two is located in the sixth radial layer of the stator core.

[0122] In coil group one, three first conductor groups 10 are sequentially arranged along the circumferential direction of the stator core. Each first conductor group 10 has three conductors: the first conductor is a long-pitch conductor 100, the second conductor is a short-pitch conductor 101, and the third conductor is a full-pitch conductor 102. The three first conductor groups 10 are arranged sequentially along the circumferential direction of the stator core. In the first first conductor group 10, the long-pitch conductor 100 is located in slots 01 and 11 of the first layer, the short-pitch conductor 101 is located in slots 02 and 10 of the first layer, and the full-pitch conductor 102... Conductor 102 is located in slots 03 and 12 of the first layer. In the second first conductor group 10, long-pitch conductor 100 is located in slots 19 and 29 of the first layer, short-pitch conductor 101 is located in slots 20 and 28 of the first layer, and full-pitch conductor 102 is located in slots 21 and 30 of the first layer. In the third first conductor group 10, long-pitch conductor 100 is located in slots 37 and 47 of the first layer, short-pitch conductor 101 is located in slots 38 and 46 of the first layer, and full-pitch conductor 102 is located in slots 39 and 48 of the first layer.

[0123] In coil group two, three second conductor groups 20 are sequentially arranged along the circumferential direction of the stator core. Each second conductor group 20 has three conductors: the first conductor is a full-pitch conductor 102, the second conductor is a long-pitch conductor 100, and the third conductor is a short-pitch conductor 101. The three second conductor groups 20 are arranged sequentially along the circumferential direction of the stator core. In the first second conductor group 20, the full-pitch conductor 102 is located in slots 02 and 11 of the sixth layer, the long-pitch conductor 100 is located in slots 03 and 13 of the sixth layer, and the short-pitch conductor 101... Conductor 101 is located in slots 04 and 12 of the sixth layer. In the second second conductor group 20, the full-pitch conductor 102 is located in slots 20 and 29 of the sixth layer. The long-pitch conductor 100 is located in slots 21 and 31 of the sixth layer. The short-pitch conductor 101 is located in slots 22 and 30 of the sixth layer. In the third second conductor group 20, the full-pitch conductor 102 is located in slots 38 and 47 of the sixth layer. The long-pitch conductor 100 is located in slots 39 and 49 of the sixth layer. The short-pitch conductor 101 is located in slots 40 and 48 of the sixth layer.

[0124] In the first coil group 3, six third conductor groups 30 are sequentially arranged along the circumferential direction of the stator core. Each third conductor group 30 has three conductors, all of which are full-pitch conductors 102. The three third conductor groups 30 are arranged sequentially along the circumferential direction of the stator core. In the first third conductor group 30, the first full-pitch conductor 102 is located in slot 01 of the third layer and slot 10 of the second layer; the second full-pitch conductor 102 is located in slot 02 of the third layer and slot 11 of the second layer; and the third full-pitch conductor 102 is located in slot 03 of the third layer and slot 12 of the second layer. In the second third conductor group 30, the first full-pitch conductor 102 is located in slot 10 of the third layer and slot 19 of the second layer; the second full-pitch conductor 102 is located in slot 11 of the third layer and slot 20 of the second layer; and the third full-pitch conductor 102 is located in slot 12 of the third layer and slot 21 of the second layer. In the third third conductor group 30, the first full-pitch conductor 102 is located in slot 19 of the third layer and slot 28 of the second layer; the second full-pitch conductor 102 is located in slot 03 of the third layer and slot 12 of the second layer. The third layer's slot 20, the second layer's slot 29, and the third full-pitch conductor 102 are located in the third layer's slot 21 and the second layer's slot 30; in the fourth third conductor group 30, the first full-pitch conductor 102 is located in the third layer's slot 28 and the second layer's slot 37, the second full-pitch conductor 102 is located in the third layer's slot 29 and the second layer's slot 38, and the third full-pitch conductor 102 is located in the third layer's slot 30 and the second layer's slot 39; in the fifth third conductor group 30, the first full-pitch conductor 102 is located in the... The third layer has slot 37 and slot 46 in the second layer. The second full-pitch conductor 102 is located in slot 38 and slot 47 in the third layer. The third full-pitch conductor 102 is located in slot 39 and slot 48 in the third layer. In the sixth third conductor group 30, the first full-pitch conductor 102 is located in slot 46 in the third layer and slot 01 in the second layer. The second full-pitch conductor 102 is located in slot 47 and slot 02 in the third layer. The third full-pitch conductor 102 is located in slot 48 in the third layer and slot 03 in the second layer.

[0125] In the second coil group 3, six third conductor groups 30 are sequentially arranged along the circumferential direction of the stator core. Each third conductor group 30 has three conductors, all of which are full-pitch conductors 102. The three third conductor groups 30 are arranged sequentially along the circumferential direction of the stator core. In the first third conductor group 30, the first full-pitch conductor 102 is located in slot 02 of the fifth layer and slot 11 of the fourth layer; the second full-pitch conductor 102 is located in slot 03 of the fifth layer and slot 12 of the fourth layer; and the third full-pitch conductor 102 is located in slot 04 of the fifth layer and slot 13 of the fourth layer. In the second third conductor group 30, the first full-pitch conductor 102 is located in slot 11 of the fifth layer and slot 20 of the fourth layer; the second full-pitch conductor 102 is located in slot 12 of the fifth layer and slot 21 of the fourth layer; and the third full-pitch conductor 102 is located in slot 13 of the fifth layer and slot 22 of the fourth layer. In the third third conductor group 30, the first full-pitch conductor 102 is located in slot 20 of the fifth layer and slot 29 of the fourth layer; the second full-pitch conductor 102 is located in slot 03 of the fifth layer and slot 12 of the fourth layer; and the third full-pitch conductor 102 is located in slot 04 of the fifth layer and slot 13 of the fourth layer. The fifth layer's slot 21, the fourth layer's slot 30, and the third full-pitch conductor 102 are located in slots 22 and 31 of the fifth layer; in the fourth third conductor group 30, the first full-pitch conductor 102 is located in slots 29 and 38 of the fifth layer, the second full-pitch conductor 102 is located in slots 30 and 39 of the fifth layer, and the third full-pitch conductor 102 is located in slots 31 and 40 of the fifth layer; the first full-pitch conductor 102 in the fifth third conductor group 30 is located in slot 22 of the fifth layer and slot 31 of the fourth layer; The fifth layer has slot 38 and the fourth layer has slot 47. The second full-pitch conductor 102 is located in slot 39 of the fifth layer and slot 48 of the fourth layer. The third full-pitch conductor 102 is located in slot 40 of the fifth layer and slot 49 of the fourth layer. In the sixth third conductor group 30, the first full-pitch conductor 102 is located in slot 47 of the fifth layer and slot 02 of the fourth layer. The second full-pitch conductor 102 is located in slot 48 of the fifth layer and slot 03 of the fourth layer. The third full-pitch conductor 102 is located in slot 49 of the fifth layer and slot 04 of the fourth layer.

[0126] On the welding end side of the phase winding, the two welding ends of the two corresponding conductors of the two radially adjacent layers are welded. The pitch between the welding ends of the two phases of the radial third and fourth layers is the long pitch, which is 10. The pitch between the welding ends of the two phases of other radially adjacent layers is the whole pitch, which is 9.

[0127] Example 7

[0128] The difference between this embodiment and Embodiment Six is ​​that:

[0129] like Figure 18 and Figure 19As shown, in coil group one, three first conductor groups 10 are sequentially arranged along the circumferential direction of the stator core. Each first conductor group 10 has three conductors: the first conductor is a long-pitch conductor 100, the second conductor is a short-pitch conductor 101, and the third conductor is a full-pitch conductor 102. The three first conductor groups 10 are sequentially arranged along the circumferential direction of the stator core. In the first first conductor group 10, the long-pitch conductor 100 is located in slots 02 and 12 of the first layer, the short-pitch conductor 101 is located in slots 03 and 11 of the first layer, and the full-pitch conductor 102 is located in slots 03 and 11 of the first layer. The pitch conductor 102 is located in slots 04 and 13 of the first layer. The long pitch conductor 100 in the second first conductor group 10 is located in slots 20 and 30 of the first layer. The short pitch conductor 101 is located in slots 21 and 29 of the first layer. The full pitch conductor 102 is located in slots 22 and 31 of the first layer. The long pitch conductor 100 in the third first conductor group 10 is located in slots 38 and 48 of the first layer. The short pitch conductor 101 is located in slots 39 and 47 of the first layer. The full pitch conductor 102 is located in slots 40 and 49 of the first layer.

[0130] In coil group two, three second conductor groups 20 are sequentially arranged along the circumferential direction of the stator core. Each second conductor group 20 has three conductors: the first conductor is a full-pitch conductor 102, the second conductor is a long-pitch conductor 100, and the third conductor is a short-pitch conductor 101. The three second conductor groups 20 are arranged sequentially along the circumferential direction of the stator core. In the first second conductor group 20, the full-pitch conductor 102 is located in slots 01 and 10 of the sixth layer, the long-pitch conductor 100 is located in slots 02 and 12 of the sixth layer, and the short-pitch conductor 101... Conductor 101 is located in slots 03 and 11 of the sixth layer. In the second second conductor group 20, the full-pitch conductor 102 is located in slots 19 and 28 of the sixth layer. The long-pitch conductor 100 is located in slots 20 and 30 of the sixth layer. The short-pitch conductor 101 is located in slots 21 and 29 of the sixth layer. In the third second conductor group 20, the full-pitch conductor 102 is located in slots 37 and 46 of the sixth layer. The long-pitch conductor 100 is located in slots 38 and 48 of the sixth layer. The short-pitch conductor 101 is located in slots 39 and 47 of the sixth layer.

[0131] In the first coil group 3, six third conductor groups 30 are sequentially arranged along the circumferential direction of the stator core. Each third conductor group 30 has three conductors, all of which are full-pitch conductors 102. The three third conductor groups 30 are arranged sequentially along the circumferential direction of the stator core. In the first third conductor group 30, the first full-pitch conductor 102 is located in slot 02 of the third layer and slot 11 of the second layer; the second full-pitch conductor 102 is located in slot 03 of the third layer and slot 12 of the second layer; and the third full-pitch conductor 102 is located in slot 04 of the third layer and slot 13 of the second layer. In the second third conductor group 30, the first full-pitch conductor 102 is located in slot 11 of the third layer and slot 20 of the second layer; the second full-pitch conductor 102 is located in slot 12 of the third layer and slot 21 of the second layer; and the third full-pitch conductor 102 is located in slot 13 of the third layer and slot 22 of the second layer. In the third third conductor group 30, the first full-pitch conductor 102 is located in slot 20 of the third layer and slot 29 of the second layer; the second full-pitch conductor 102 is located in slot 04 of the third layer and slot 13 of the second layer. The third layer's slot 21 and the second layer's slot 30; the third full-pitch conductor 102 is located in slot 22 of the third layer and slot 31 of the second layer; in the fourth third conductor group 30, the first full-pitch conductor 102 is located in slot 29 of the third layer and slot 38 of the second layer, the second full-pitch conductor 102 is located in slot 30 of the third layer and slot 39 of the second layer, and the third full-pitch conductor 102 is located in slot 31 of the third layer and slot 40 of the second layer; in the fifth third conductor group 30, the first full-pitch conductor 102 is located in slot 22 of the third layer and slot 31 of the second layer; The third layer has slot 38 and slot 47 in the second layer. The second full-pitch conductor 102 is located in slot 39 and slot 48 in the third layer. The third full-pitch conductor 102 is located in slot 40 in the third layer and slot 49 in the second layer. In the sixth third conductor group 30, the first full-pitch conductor 102 is located in slot 47 in the third layer and slot 02 in the second layer. The second full-pitch conductor 102 is located in slot 48 and slot 03 in the third layer. The third full-pitch conductor 102 is located in slot 49 in the third layer and slot 04 in the second layer.

[0132] In the second coil group 3, six third conductor groups 30 are sequentially arranged along the circumferential direction of the stator core. Each third conductor group 30 has three conductors, all of which are full-pitch conductors 102. The three third conductor groups 30 are arranged sequentially along the circumferential direction of the stator core. In the first third conductor group 30, the first full-pitch conductor 102 is located in slot 01 of the fifth layer and slot 10 of the fourth layer; the second full-pitch conductor 102 is located in slot 02 of the fifth layer and slot 11 of the fourth layer; and the third full-pitch conductor 102 is located in slot 03 of the fifth layer and slot 12 of the fourth layer. In the second third conductor group 30, the first full-pitch conductor 102 is located in slot 10 of the fifth layer and slot 19 of the fourth layer; the second full-pitch conductor 102 is located in slot 11 of the fifth layer and slot 20 of the fourth layer; and the third full-pitch conductor 102 is located in slot 12 of the fifth layer and slot 21 of the fourth layer. In the third third conductor group 30, the first full-pitch conductor 102 is located in slot 19 of the fifth layer and slot 28 of the fourth layer; the second full-pitch conductor 102 is located in slot 03 of the fifth layer and slot 12 of the fourth layer. The fifth layer's 20 slot, the fourth layer's 29 slot, and the third full-pitch conductor 102 are located in the fifth layer's 21 slot and the fourth layer's 30 slot; in the fourth third conductor group 30, the first full-pitch conductor 102 is located in the fifth layer's 28 slot and the fourth layer's 37 slot, the second full-pitch conductor 102 is located in the fifth layer's 29 slot and the fourth layer's 38 slot, and the third full-pitch conductor 102 is located in the fifth layer's 30 slot and the fourth layer's 39 slot; in the fifth third conductor group 30, the first full-pitch conductor 102 is located in the fifth layer's 28 slot and the fourth layer's 37 slot, the second full-pitch conductor 102 is located in the fifth layer's 29 slot and the fourth layer's 38 slot, and the third full-pitch conductor 102 is located in the fifth layer's 30 slot and the fourth layer's 39 slot; The fifth layer has slot 37 and the fourth layer has slot 46. The second full-pitch conductor 102 is located in slot 38 of the fifth layer and slot 47 of the fourth layer. The third full-pitch conductor 102 is located in slot 39 of the fifth layer and slot 48 of the fourth layer. In the sixth third conductor group 30, the first full-pitch conductor 102 is located in slot 46 of the fifth layer and slot 01 of the fourth layer. The second full-pitch conductor 102 is located in slot 47 of the fifth layer and slot 02 of the fourth layer. The third full-pitch conductor 102 is located in slot 48 of the fifth layer and slot 03 of the fourth layer.

[0133] On the welding end side of the phase winding, the two welding ends of the two corresponding conductors of the two radially adjacent layers are welded. The pitch between the welding ends of the two phases of the radial third and fourth layers is a short pitch of 8. The pitch between the welding ends of the two phases of other radially adjacent layers is a whole pitch of 9.

[0134] The other structures are the same, so they will not be described in detail here.

[0135] Example 8

[0136] like Figure 20 and Figure 21As shown, the stator core has eight radial layers. Each phase winding of the stator winding includes coil group one, coil group two, and three coil groups three. Along the radial direction of the stator core, coil group one is located in the first radial layer of the stator core, coil group three is located in the second, third, fourth, fifth, sixth, and seventh radial layers of the stator core, and coil group two is located in the eighth radial layer of the stator core.

[0137] In coil group one, three first conductor groups 10 are sequentially arranged along the circumferential direction of the stator core. Each first conductor group 10 has three conductors: the first conductor is a long-pitch conductor 100, the second conductor is a short-pitch conductor 101, and the third conductor is a full-pitch conductor 102. The three first conductor groups 10 are arranged sequentially along the circumferential direction of the stator core. In the first first conductor group 10, the long-pitch conductor 100 is located in slots 01 and 11 of the first layer, the short-pitch conductor 101 is located in slots 02 and 10 of the first layer, and the full-pitch conductor 102... Conductor 102 is located in slots 03 and 12 of the first layer. In the second first conductor group 10, long-pitch conductor 100 is located in slots 19 and 29 of the first layer, short-pitch conductor 101 is located in slots 20 and 28 of the first layer, and full-pitch conductor 102 is located in slots 21 and 30 of the first layer. In the third first conductor group 10, long-pitch conductor 100 is located in slots 37 and 47 of the first layer, short-pitch conductor 101 is located in slots 38 and 46 of the first layer, and full-pitch conductor 102 is located in slots 39 and 48 of the first layer.

[0138] In coil group two, three second conductor groups 20 are sequentially arranged along the circumferential direction of the stator core. Each second conductor group 20 has three conductors: the first conductor is a full-pitch conductor 102, the second conductor is a long-pitch conductor 100, and the third conductor is a short-pitch conductor 101. The three second conductor groups 20 are arranged sequentially along the circumferential direction of the stator core. In the first second conductor group 20, the full-pitch conductor 102 is located in slots 02 and 11 of the eighth layer, the long-pitch conductor 100 is located in slots 03 and 13 of the eighth layer, and the short-pitch conductor 101... Conductor 101 is located in slots 04 and 12 of the eighth layer. In the second second conductor group 20, the full-pitch conductor 102 is located in slots 20 and 29 of the eighth layer. The long-pitch conductor 100 is located in slots 21 and 31 of the eighth layer. The short-pitch conductor 101 is located in slots 22 and 30 of the eighth layer. In the third second conductor group 20, the full-pitch conductor 102 is located in slots 38 and 47 of the eighth layer. The long-pitch conductor 100 is located in slots 39 and 49 of the eighth layer. The short-pitch conductor 101 is located in slots 40 and 48 of the eighth layer.

[0139] In the first coil group 3, six third conductor groups 30 are sequentially arranged along the circumferential direction of the stator core. Each third conductor group 30 has three conductors, all of which are full-pitch conductors 102. The three third conductor groups 30 are arranged sequentially along the circumferential direction of the stator core. In the first third conductor group 30, the first full-pitch conductor 102 is located in slot 01 of the third layer and slot 10 of the second layer; the second full-pitch conductor 102 is located in slot 02 of the third layer and slot 11 of the second layer; and the third full-pitch conductor 102 is located in slot 03 of the third layer and slot 12 of the second layer. In the second third conductor group 30, the first full-pitch conductor 102 is located in slot 10 of the third layer and slot 19 of the second layer; the second full-pitch conductor 102 is located in slot 11 of the third layer and slot 20 of the second layer; and the third full-pitch conductor 102 is located in slot 12 of the third layer and slot 21 of the second layer. In the third third conductor group 30, the first full-pitch conductor 102 is located in slot 19 of the third layer and slot 28 of the second layer; the second full-pitch conductor 102 is located in slot 03 of the third layer and slot 12 of the second layer. The third layer's slot 20, the second layer's slot 29, and the third full-pitch conductor 102 are located in the third layer's slot 21 and the second layer's slot 30; in the fourth third conductor group 30, the first full-pitch conductor 102 is located in the third layer's slot 28 and the second layer's slot 37, the second full-pitch conductor 102 is located in the third layer's slot 29 and the second layer's slot 38, and the third full-pitch conductor 102 is located in the third layer's slot 30 and the second layer's slot 39; in the fifth third conductor group 30, the first full-pitch conductor 102 is located in the... The third layer has slot 37 and slot 46 in the second layer. The second full-pitch conductor 102 is located in slot 38 and slot 47 in the third layer. The third full-pitch conductor 102 is located in slot 39 and slot 48 in the third layer. In the sixth third conductor group 30, the first full-pitch conductor 102 is located in slot 46 in the third layer and slot 01 in the second layer. The second full-pitch conductor 102 is located in slot 47 and slot 02 in the third layer. The third full-pitch conductor 102 is located in slot 48 in the third layer and slot 03 in the second layer.

[0140] In the second coil group 3, six third conductor groups 30 are sequentially arranged along the circumferential direction of the stator core. Each third conductor group 30 has three conductors, all of which are short-pitch conductors 101. The three third conductor groups 30 are arranged sequentially along the circumferential direction of the stator core. In the first third conductor group 30, the first short-pitch conductor 101 is located in slot 02 of the fifth layer and slot 10 of the fourth layer; the second short-pitch conductor 101 is located in slot 03 of the fifth layer and slot 11 of the fourth layer; and the third short-pitch conductor 101 is located in slot 04 of the fifth layer and slot 12 of the fourth layer. In the second third conductor group 30, the first short-pitch conductor 101 is located in slot 11 of the fifth layer and slot 19 of the fourth layer; the second short-pitch conductor 101 is located in slot 12 of the fifth layer and slot 20 of the fourth layer; and the third short-pitch conductor 101 is located in slot 13 of the fifth layer and slot 21 of the fourth layer. In the third third conductor group 30, the first short-pitch conductor 101 is located in slot 20 of the fifth layer and slot 28 of the fourth layer; the second short-pitch conductor 101 is located in slot 03 of the fifth layer and slot 11 of the fourth layer; and the third short-pitch conductor 101 is located in slot 04 of the fifth layer and slot 12 of the fourth layer. The fifth layer's slot 21, the fourth layer's slot 29, and the third short-pitch conductor 101 are located in the fifth layer's slot 22 and the fourth layer's slot 30; in the fourth third conductor group 30, the first short-pitch conductor 101 is located in the fifth layer's slot 29 and the fourth layer's slot 37, the second short-pitch conductor 101 is located in the fifth layer's slot 30 and the fourth layer's slot 38, and the third short-pitch conductor 101 is located in the fifth layer's slot 31 and the fourth layer's slot 39; in the fifth third conductor group 30, the first short-pitch conductor 101 is located in the fifth layer's slot 21 and the fourth layer's slot 39. The fifth layer has slot 38, the fourth layer has slot 46, the second short-pitch conductor 101 is located in slot 39 of the fifth layer and slot 47 of the fourth layer, the third short-pitch conductor 101 is located in slot 40 of the fifth layer and slot 48 of the fourth layer; the sixth third conductor group 30 has the first short-pitch conductor 101 located in slot 47 of the fifth layer and slot 01 of the fourth layer, the second short-pitch conductor 101 located in slot 48 of the fifth layer and slot 02 of the fourth layer, and the third short-pitch conductor 101 located in slot 49 of the fifth layer and slot 03 of the fourth layer.

[0141] In the third coil group, six third conductor groups 30 are sequentially arranged along the circumferential direction of the stator core. Each third conductor group 30 has three conductors, all of which are full-pitch conductors 102. The three third conductor groups 30 are arranged sequentially along the circumferential direction of the stator core. In the first third conductor group 30, the first full-pitch conductor 102 is located in slot 02 of the seventh layer and slot 11 of the sixth layer; the second full-pitch conductor 102 is located in slot 03 of the seventh layer and slot 12 of the sixth layer; and the third full-pitch conductor 102 is located in slot 04 of the seventh layer and slot 13 of the sixth layer. In the second third conductor group 30, the first full-pitch conductor 102 is located in slot 11 of the seventh layer and slot 20 of the sixth layer; the second full-pitch conductor 102 is located in slot 12 of the seventh layer and slot 21 of the sixth layer; and the third full-pitch conductor 102 is located in slot 13 of the seventh layer and slot 22 of the sixth layer. In the third third conductor group 30, the first full-pitch conductor 102 is located in slot 20 of the seventh layer and slot 29 of the sixth layer; the second full-pitch conductor 102 is located in slot 03 of the seventh layer and slot 12 of the sixth layer; and the third full-pitch conductor 102 is located in slot 04 of the seventh layer and slot 13 of the sixth layer. The 21st slot of the seventh layer and the 30th slot of the sixth layer; the third full-pitch conductor 102 is located in the 22nd slot of the seventh layer and the 31st slot of the sixth layer; the first full-pitch conductor 102 in the fourth third conductor group 30 is located in the 29th slot of the seventh layer and the 38th slot of the sixth layer, the second full-pitch conductor 102 is located in the 30th slot of the seventh layer and the 39th slot of the sixth layer, and the third full-pitch conductor 102 is located in the 31st slot of the seventh layer and the 40th slot of the sixth layer; the first full-pitch conductor 102 in the fifth third conductor group 30 is located in the 21st slot of the seventh layer and the 30th slot of the sixth layer. The 38th slot of the seventh layer and the 47th slot of the sixth layer; the second full-pitch conductor 102 is located in the 39th slot of the seventh layer and the 48th slot of the sixth layer; the third full-pitch conductor 102 is located in the 40th slot of the seventh layer and the 49th slot of the sixth layer; the first full-pitch conductor 102 in the sixth third conductor group 30 is located in the 47th slot of the seventh layer and the 02th slot of the sixth layer; the second full-pitch conductor 102 is located in the 48th slot of the seventh layer and the 03rd slot of the sixth layer; the third full-pitch conductor 102 is located in the 49th slot of the seventh layer and the 04th slot of the sixth layer.

[0142] On the welding end side of the phase winding, the two welding ends of the two corresponding conductors of the two radially adjacent layers are welded. The pitch between the welding ends of the two phases of the two radially adjacent layers is a whole pitch, which is 9.

[0143] Example 9

[0144] Compared with Embodiment 8, this embodiment differs in the pitch of the conductors in the third conductor group 30 of the second coil group 3, and the slots occupied by coil group 1, the three coil groups 3, and coil group 2 are different, but everything else is the same.

[0145] In this embodiment, as Figure 22 and Figure 23As shown, in coil group one, three first conductor groups 10 are sequentially arranged along the circumferential direction of the stator core. Each first conductor group 10 has three conductors: the first conductor is a long-pitch conductor 100, the second conductor is a short-pitch conductor 101, and the third conductor is a full-pitch conductor 102. The three first conductor groups 10 are sequentially arranged along the circumferential direction of the stator core. In the first first conductor group 10, the long-pitch conductor 100 is located in slots 02 and 12 of the first layer, the short-pitch conductor 101 is located in slots 03 and 11 of the first layer, and the full-pitch conductor 102 is located in slots 03 and 11 of the first layer. The pitch conductor 102 is located in slots 04 and 13 of the first layer. The long pitch conductor 100 in the second first conductor group 10 is located in slots 20 and 30 of the first layer. The short pitch conductor 101 is located in slots 21 and 29 of the first layer. The full pitch conductor 102 is located in slots 22 and 31 of the first layer. The long pitch conductor 100 in the third first conductor group 10 is located in slots 38 and 48 of the first layer. The short pitch conductor 101 is located in slots 39 and 47 of the first layer. The full pitch conductor 102 is located in slots 40 and 49 of the first layer.

[0146] In coil group two, three second conductor groups 20 are sequentially arranged along the circumferential direction of the stator core. Each second conductor group 20 has three conductors: the first conductor is a full-pitch conductor 102, the second conductor is a long-pitch conductor 100, and the third conductor is a short-pitch conductor 101. The three second conductor groups 20 are arranged sequentially along the circumferential direction of the stator core. In the first second conductor group 20, the full-pitch conductor 102 is located in slots 01 and 10 of the eighth layer, the long-pitch conductor 100 is located in slots 02 and 12 of the eighth layer, and the short-pitch conductor 101... Conductor 101 is located in slots 03 and 11 of the eighth layer. In the second second conductor group 20, the full-pitch conductor 102 is located in slots 19 and 28 of the eighth layer. The long-pitch conductor 100 is located in slots 20 and 30 of the eighth layer. The short-pitch conductor 101 is located in slots 21 and 29 of the eighth layer. In the third second conductor group 20, the full-pitch conductor 102 is located in slots 37 and 46 of the eighth layer. The long-pitch conductor 100 is located in slots 38 and 48 of the eighth layer. The short-pitch conductor 101 is located in slots 39 and 47 of the eighth layer.

[0147] In the first coil group 3, six third conductor groups 30 are sequentially arranged along the circumferential direction of the stator core. Each third conductor group 30 has three conductors, all of which are full-pitch conductors 102. The three third conductor groups 30 are arranged sequentially along the circumferential direction of the stator core. In the first third conductor group 30, the first full-pitch conductor 102 is located in slot 02 of the third layer and slot 11 of the second layer; the second full-pitch conductor 102 is located in slot 03 of the third layer and slot 12 of the second layer; and the third full-pitch conductor 102 is located in slot 04 of the third layer and slot 13 of the second layer. In the second third conductor group 30, the first full-pitch conductor 102 is located in slot 11 of the third layer and slot 20 of the second layer; the second full-pitch conductor 102 is located in slot 12 of the third layer and slot 21 of the second layer; and the third full-pitch conductor 102 is located in slot 13 of the third layer and slot 22 of the second layer. In the third third conductor group 30, the first full-pitch conductor 102 is located in slot 18 of the third layer and slot 29 of the second layer; the second full-pitch conductor 102 is located in slot 04 of the third layer and slot 13 of the second layer. The third layer's slot 21, the second layer's slot 28, and the third full-pitch conductor 102 are located in slot 22 of the third layer and slot 31 of the second layer; in the fourth third conductor group 30, the first full-pitch conductor 102 is located in slot 29 of the third layer and slot 38 of the second layer, the second full-pitch conductor 102 is located in slot 30 of the third layer and slot 37 of the second layer, and the third full-pitch conductor 102 is located in slot 31 of the third layer and slot 38 of the second layer; in the fifth third conductor group 30, the first full-pitch conductor 102 is located in slot 21 of the third layer and slot 28 of the second layer. The third layer has slot 38 and slot 47 in the second layer. The second full-pitch conductor 102 is located in slot 39 and slot 48 in the third layer. The third full-pitch conductor 102 is located in slot 40 in the third layer and slot 49 in the second layer. In the sixth third conductor group 30, the first full-pitch conductor 102 is located in slot 47 in the third layer and slot 02 in the second layer. The second full-pitch conductor 102 is located in slot 48 and slot 03 in the third layer. The third full-pitch conductor 102 is located in slot 49 in the third layer and slot 04 in the second layer.

[0148] In the second coil group 3, six third conductor groups 30 are sequentially arranged along the circumferential direction of the stator core. Each third conductor group 30 has three conductors, all of which are long-pitch conductors 100. The three third conductor groups 30 are arranged sequentially along the circumferential direction of the stator core. In the first third conductor group 30, the first long-pitch conductor 100 is located in slot 01 of the fifth layer and slot 11 of the fourth layer; the second long-pitch conductor 100 is located in slot 02 of the fifth layer and slot 12 of the fourth layer; and the third long-pitch conductor 100 is located in slot 03 of the fifth layer and slot 13 of the fourth layer. In the second third conductor group 30, the first long-pitch conductor 100 is located in slot 10 of the fifth layer and slot 20 of the fourth layer; the second long-pitch conductor 100 is located in slot 11 of the fifth layer and slot 21 of the fourth layer; and the third long-pitch conductor 100 is located in slot 12 of the fifth layer and slot 22 of the fourth layer. In the third third conductor group 30, the first long-pitch conductor 100 is located in slot 19 of the fifth layer and slot 29 of the fourth layer; the second long-pitch conductor 100 is located in slot 01 of the fifth layer and slot 29 of the fourth layer; and the third long-pitch conductor 100 is located in slot 02 of the fifth layer and slot 12 of the fourth layer. The fifth layer's slot 20, the fourth layer's slot 30, and the third long-pitch conductor 100 are located in slots 21 and 31 of the fifth layer; in the fourth third conductor group 30, the first long-pitch conductor 100 is located in slot 28 of the fifth layer and slot 38 of the fourth layer, the second long-pitch conductor 100 is located in slot 29 of the fifth layer and slot 39 of the fourth layer, and the third long-pitch conductor 100 is located in slot 30 of the fifth layer and slot 40 of the fourth layer; the first long-pitch conductor 100 in the fifth third conductor group 30 is located in slot 20 of the fifth layer and slot 38 of the fourth layer, the second long-pitch conductor 100 is located in slot 29 of the fifth layer and slot 39 of the fourth layer, and the third long-pitch conductor 100 is located in slot 30 of the fifth layer and slot 40 of the fourth layer; The fifth layer has slot 37, the fourth layer has slot 47, the second long-pitch conductor 100 is located in slot 38 of the fifth layer and slot 48 of the fourth layer, the third long-pitch conductor 100 is located in slot 39 of the fifth layer and slot 49 of the fourth layer; the sixth third conductor group 30 has the first long-pitch conductor 100 located in slot 46 of the fifth layer and slot 02 of the fourth layer, the second long-pitch conductor 100 located in slot 47 of the fifth layer and slot 03 of the fourth layer, and the third long-pitch conductor 100 located in slot 48 of the fifth layer and slot 04 of the fourth layer.

[0149] In the third coil group, six third conductor groups 30 are sequentially arranged along the circumferential direction of the stator core. Each third conductor group 30 has three conductors, all of which are full-pitch conductors 102. The three third conductor groups 30 are arranged sequentially along the circumferential direction of the stator core. In the first third conductor group 30, the first full-pitch conductor 102 is located in slot 01 of the seventh layer and slot 10 of the sixth layer; the second full-pitch conductor 102 is located in slot 02 of the seventh layer and slot 11 of the sixth layer; and the third full-pitch conductor 102 is located in slot 03 of the seventh layer and slot 12 of the sixth layer. In the second third conductor group 30, the first full-pitch conductor 102 is located in slot 10 of the seventh layer and slot 19 of the sixth layer; the second full-pitch conductor 102 is located in slot 11 of the seventh layer and slot 20 of the sixth layer; and the third full-pitch conductor 102 is located in slot 12 of the seventh layer and slot 21 of the sixth layer. In the third third conductor group 30, the first full-pitch conductor 102 is located in slot 19 of the seventh layer and slot 28 of the sixth layer; the second full-pitch conductor 102 is located in slot 03 of the seventh layer and slot 12 of the sixth layer. The 20th slot of the seventh layer and the 29th slot of the sixth layer; the third full-pitch conductor 102 is located in the 21st slot of the seventh layer and the 30th slot of the sixth layer; the first full-pitch conductor 102 in the fourth third conductor group 30 is located in the 28th slot of the seventh layer and the 37th slot of the sixth layer, the second full-pitch conductor 102 is located in the 29th slot of the seventh layer and the 38th slot of the sixth layer, and the third full-pitch conductor 102 is located in the 30th slot of the seventh layer and the 39th slot of the sixth layer; the first full-pitch conductor 102 in the fifth third conductor group 30 is located in the 21st slot of the seventh layer and the 30th slot of the sixth layer. The 37th slot of the seventh layer and the 46th slot of the sixth layer; the second full-pitch conductor 102 is located in the 38th slot of the seventh layer and the 47th slot of the sixth layer; the third full-pitch conductor 102 is located in the 39th slot of the seventh layer and the 48th slot of the sixth layer; the first full-pitch conductor 102 in the sixth third conductor group 30 is located in the 46th slot of the seventh layer and the 01st slot of the sixth layer; the second full-pitch conductor 102 is located in the 47th slot of the seventh layer and the 02nd slot of the sixth layer; the third full-pitch conductor 102 is located in the 48th slot of the seventh layer and the 03rd slot of the sixth layer.

[0150] Example 10

[0151] Compared with Embodiment Six, the positions of the slots occupied by the conductors in the second conductor group of coil group two and the third conductor group of the second coil group three are different. The pitch between the two corresponding welding ends of the third and fourth layers at the welding end is different, but the rest are the same.

[0152] In this embodiment, as Figure 24-25As shown, in coil group two, three second conductor groups 20 are sequentially arranged along the circumferential direction of the stator core. Each second conductor group 20 has three conductors: the first conductor is a full-pitch conductor 102, the second conductor is a long-pitch conductor 100, and the third conductor is a short-pitch conductor 101. The three second conductor groups 20 are sequentially arranged along the circumferential direction of the stator core. In the first second conductor group 20, the full-pitch conductor 102 is located in slots 01 and 10 of the sixth layer, the long-pitch conductor 100 is located in slots 02 and 12 of the sixth layer, and the short-pitch conductor 101... The pitch conductor 101 is located in slots 03 and 11 of the sixth layer. The full pitch conductor 102 in the second second conductor group 20 is located in slots 19 and 28 of the sixth layer. The long pitch conductor 100 is located in slots 20 and 30 of the sixth layer. The short pitch conductor 101 is located in slots 21 and 29 of the sixth layer. The full pitch conductor 102 in the third second conductor group 20 is located in slots 37 and 46 of the sixth layer. The long pitch conductor 100 is located in slots 38 and 48 of the sixth layer. The short pitch conductor 101 is located in slots 39 and 47 of the sixth layer.

[0153] In the second coil group 3, six third conductor groups 30 are sequentially arranged along the circumferential direction of the stator core. Each third conductor group 30 has three conductors, all of which are full-pitch conductors 102. The three third conductor groups 30 are arranged sequentially along the circumferential direction of the stator core. In the first third conductor group 30, the first full-pitch conductor 102 is located in slot 01 of the fifth layer and slot 10 of the fourth layer; the second full-pitch conductor 102 is located in slot 02 of the fifth layer and slot 11 of the fourth layer; and the third full-pitch conductor 102 is located in slot 03 of the fifth layer and slot 12 of the fourth layer. In the second third conductor group 30, the first full-pitch conductor 102 is located in slot 10 of the fifth layer and slot 19 of the fourth layer; the second full-pitch conductor 102 is located in slot 11 of the fifth layer and slot 20 of the fourth layer; and the third full-pitch conductor 102 is located in slot 12 of the fifth layer and slot 21 of the fourth layer. In the third third conductor group 30, the first full-pitch conductor 102 is located in slot 19 of the fifth layer and slot 28 of the fourth layer; the second full-pitch conductor 102 is located in slot 03 of the fifth layer and slot 12 of the fourth layer. The fifth layer's 20 slot, the fourth layer's 29 slot, and the third full-pitch conductor 102 are located in the fifth layer's 21 slot and the fourth layer's 30 slot; in the fourth third conductor group 30, the first full-pitch conductor 102 is located in the fifth layer's 28 slot and the fourth layer's 37 slot, the second full-pitch conductor 102 is located in the fifth layer's 29 slot and the fourth layer's 38 slot, and the third full-pitch conductor 102 is located in the fifth layer's 30 slot and the fourth layer's 39 slot; in the fifth third conductor group 30, the first full-pitch conductor 102 is located in the fifth layer's 28 slot and the fourth layer's 37 slot, the second full-pitch conductor 102 is located in the fifth layer's 29 slot and the fourth layer's 38 slot, and the third full-pitch conductor 102 is located in the fifth layer's 30 slot and the fourth layer's 39 slot; The fifth layer has slot 37 and the fourth layer has slot 46. The second full-pitch conductor 102 is located in slot 38 of the fifth layer and slot 47 of the fourth layer. The third full-pitch conductor 102 is located in slot 39 of the fifth layer and slot 48 of the fourth layer. In the sixth third conductor group 30, the first full-pitch conductor 102 is located in slot 46 of the fifth layer and slot 01 of the fourth layer. The second full-pitch conductor 102 is located in slot 47 of the fifth layer and slot 02 of the fourth layer. The third full-pitch conductor 102 is located in slot 48 of the fifth layer and slot 03 of the fourth layer.

[0154] On the welding end side of the phase winding, the two welding ends of the two corresponding conductors of the two radially adjacent layers are welded. The pitch between the welding ends of the two phases of the two radially adjacent layers is a whole pitch, which is 9.

[0155] Example 11

[0156] Compared with Example 1, the conductor pitch in the third conductor group of coil group 3 is different, but the rest of the structure is the same.

[0157] In this embodiment, as Figure 26-27As shown, in coil group three, six third conductor groups 30 are sequentially arranged along the circumferential direction of the stator core. Each third conductor group 30 has three conductors: the first conductor is a long-pitch conductor 100, the second conductor is a short-pitch conductor 101, and the third conductor is a full-pitch conductor 102. The six third conductor groups 30 are sequentially arranged along the circumferential direction of the stator core. In the first third conductor group 30, the first long-pitch conductor 100 is located in slot 01 of the third layer and slot 11 of the second layer, and the second short-pitch conductor 101 is located in slot 0 of the third layer. The second layer has slot 2, the second layer has slot 10, and the third full-pitch conductor 102 is located in slot 03 of the third layer and slot 12 of the second layer; in the second third conductor group 30, the first long-pitch conductor 100 is located in slot 10 of the third layer and slot 20 of the second layer, the second short-pitch conductor 101 is located in slot 11 of the third layer and slot 19 of the second layer, and the third full-pitch conductor 102 is located in slot 12 of the third layer and slot 21 of the second layer; in the third third conductor group 30, the first long-pitch conductor 100 is located in slot 19 of the third layer and slot 29 of the second layer. The third conductor group 30 consists of the following: the second short-pitch conductor 101 located in slot 20 of the third layer and slot 28 of the second layer; the third full-pitch conductor 102 located in slot 21 of the third layer and slot 30 of the second layer; the fourth third conductor group 30 consists of the first long-pitch conductor 100 located in slot 28 of the third layer and slot 38 of the second layer; the second short-pitch conductor 101 located in slot 29 of the third layer and slot 37 of the second layer; and the third full-pitch conductor 102 located in slot 30 of the third layer and slot 39 of the second layer; the fifth third conductor group 30 consists of the first long-pitch conductor 100 located in slot 20 of the third layer and slot 38 of the second layer; the fifth third conductor group 30 consists of the first long-pitch conductor 100 located in slot 20 of the third layer and slot 38 of the second layer; the sixth third third conductor group 30 consists of the first long-pitch conductor 100 located in slot 20 of the third layer and slot 38 of the second layer; the seventh third third conductor group 30 consists of the first long-pitch conductor 100 located in slot 20 of the third layer and slot 38 of the second layer; the eighth third third conductor group 30 consists of the first long-pitch conductor 100 located in slot 20 of the third layer and slot 37 of the second layer; the ninth third third conductor group 30 consists of the first long-pitch conductor 100 located in slot 20 of the third layer and slot 38 of the second layer; the tenth third third conductor group 30 consists of the first long-pitch conductor 100 located in slot 20 of the third layer and slot 37 of the second layer; the eleventh third third conductor group 30 consists of the first long-pitch conductor 100 located in slot 20 of the third layer and slot 38 Body 100 is located in slot 37 of the third layer and slot 47 of the second layer; the second short-pitch conductor 101 is located in slot 38 of the third layer and slot 46 of the second layer; the third full-pitch conductor 102 is located in slot 39 of the third layer and slot 48 of the second layer; in the sixth third conductor group 30, the first long-pitch conductor 100 is located in slot 46 of the third layer and slot 02 of the second layer; the second short-pitch conductor 101 is located in slot 47 of the third layer and slot 01 of the second layer; the third full-pitch conductor 102 is located in slot 48 of the third layer and slot 03 of the second layer.

[0158] Example 12

[0159] Compared with Example 11, the pitch of the conductors in the first conductor group of coil group 1 is different, and the third conductor group of coil group 3 has two types, while the other structures are the same.

[0160] In this embodiment, as Figures 32-33As shown, in coil group one, three first conductor groups 10 are sequentially arranged along the circumferential direction of the stator core. Each first conductor group 10 has three conductors, all of which are full-pitch conductors 102. The three first conductor groups 10 are arranged sequentially along the circumferential direction of the stator core. The first full-pitch conductor 102 in the first first conductor group 10 is located in slots 01 and 10 of the first layer, the second full-pitch conductor 102 is located in slots 02 and 11 of the first layer, and the third full-pitch conductor 102 is located in slots 03 and 12 of the first layer. The first full-pitch conductor 102 in the second first conductor group 10 is located in slots 19 and 28 of the first layer, the second full-pitch conductor 102 is located in slots 20 and 29 of the first layer, the third full-pitch conductor 102 is located in slots 21 and 30 of the first layer, the first full-pitch conductor 102 in the third first conductor group 10 is located in slots 37 and 46 of the first layer, the second full-pitch conductor 102 is located in slots 38 and 47 of the first layer, and the third full-pitch conductor 102 is located in slots 39 and 48 of the first layer.

[0161] In coil group three, six third conductor groups 30 are arranged sequentially along the circumferential direction of the stator core, including three first-type third conductor groups 30 and three second-type third conductor groups 30. The first-type third conductor group 30 has three conductors: the first conductor is a long-pitch conductor 100, the second conductor is a short-pitch conductor 101, and the third conductor is a full-pitch conductor 102. The second-type third conductor group 30 has three conductors, all of which are full-pitch conductors 102.

[0162] Along the circumferential direction of the stator core, the first type of third conductor group 30 and the second type of third conductor group 30 are alternately arranged, that is, the first type of third conductor group 30, the second type of third conductor group 30, the first type of third conductor group 30, ... are arranged in sequence.

[0163] In the first type 1 third conductor group 30, the long-pitch conductor 100 is located in slot 01 of the third layer and slot 11 of the second layer; the short-pitch conductor 101 is located in slot 02 of the third layer and slot 10 of the second layer; and the full-pitch conductor 102 is located in slot 03 of the third layer and slot 12 of the second layer. In the first type 2 third conductor group 30, the first full-pitch conductor 102 is located in slot 10 of the third layer and slot 19 of the second layer; the second full-pitch conductor 102 is located in slot 11 of the third layer and slot 20 of the second layer; and the third full-pitch conductor 102 is located in slot 12 of the third layer and slot 21 of the second layer. In the second type 1 third conductor group 30, the long-pitch conductor 100 is located in slot 19 of the third layer and slot 29 of the second layer; the short-pitch conductor 101 is located in slot 20 of the third layer and slot 28 of the second layer; and the full-pitch conductor 102 is located in slot 21 of the third layer and slot 30 of the second layer. In the second category of the third conductor group 30, the first full-pitch conductor 102 is located in slot 28 of the third layer and slot 37 of the second layer; the second full-pitch conductor 102 is located in slot 29 of the third layer and slot 38 of the second layer; and the third full-pitch conductor 102 is located in slot 30 of the third layer and slot 39 of the second layer. In the third category of the first category of the third conductor group 30, the long-pitch conductor 100 is located in slot 37 of the third layer and slot 47 of the second layer; the short-pitch conductor 101 is located in slot 38 of the third layer and slot 46 of the second layer; and the full-pitch conductor 102 is located in slot 39 of the third layer and slot 48 of the second layer. In the third category of the second category of the third conductor group 30, the first full-pitch conductor 102 is located in slot 46 of the third layer and slot 01 of the second layer; the second full-pitch conductor 102 is located in slot 47 of the third layer and slot 02 of the second layer; and the third full-pitch conductor 102 is located in slot 48 of the third layer and slot 03 of the second layer.

[0164] Due to the adoption of the above technical solution, the conductor groups of coil group one and coil group two in the innermost and outermost radial layers of the stator core are arranged in the same layer. The conductor groups in the innermost and outermost radial layers have three different conductor pitches. The slot positions occupied by the three different pitch conductors in the innermost radial layer are different from those occupied by the three different pitch conductors in the outermost radial layer. Multiple coil groups three are arranged between the innermost and outermost radial layers, with the coil groups three arranged in two adjacent radial layers. The conductors in the coil groups three have the same pitch, or are groups of conductors with different pitches. In this design, on the welded end side of the stator winding, the pitch between corresponding welded ends of two radially adjacent layers can be long pitch, short pitch, or full pitch. Multiple conductors in each branch winding located within the same magnetic pole of the stator winding are sequentially connected along the radial direction of the stator core. These conductors are also sequentially connected along multiple magnetic poles of the stator winding, and are connected once along the radial direction of the same magnetic pole. Given the limitations of motor design space and voltage platform, this reduces the potential difference between two radially adjacent weld points, enhancing the overall insulation performance of the motor and improving its overall breakdown strength without increasing electrical clearance. With a smaller potential difference between adjacent weld points, air insulation can meet the dielectric strength requirements, allowing the removal of coating material from the weld points and thus reducing costs.

[0165] The embodiments of the present invention have been described in detail above, but the content described is only a preferred embodiment of the present invention and should not be considered as limiting the scope of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the patent coverage of the present invention.

Claims

1. A stator winding, characterized in that: The number of slots per pole per phase is 3, and any phase winding includes... Coil group one and coil group two are located in the innermost and outermost radial layers of the stator core. Coil group one includes a plurality of first conductor groups arranged sequentially along the circumference of the stator core, and coil group two includes a second conductor group arranged sequentially along the circumference of the stator core. At least one coil group three is disposed in two radially adjacent layers of the stator core, the coil group three is disposed between the coil group one and the coil group two, and the coil group three includes a plurality of third conductor groups arranged sequentially along the circumference of the stator core; Each phase winding includes three parallel branch windings, and multiple conductors in each branch winding located in the same magnetic pole of the stator winding are connected sequentially along the radial direction of the stator core. The first conductor group, the second conductor group, and the third conductor group each include three conductors disposed in adjacent slots. The pitches of the three conductors in the first conductor group, the second conductor group, and the third conductor group are either different or the same. The multiple conductors of each branch winding are connected sequentially along the multiple magnetic poles of the stator winding, and are connected once sequentially along the radial direction of the same magnetic pole of the stator winding; The conductors of corresponding pitch types in the first conductor group and the second conductor group are located in different slots of the stator core; Along the same radial direction of the stator core, at least two slots occupied by the first conductor group are the same as those occupied by the second conductor group; The welded ends of the multiple conductors in the third conductor group extend in opposite directions along the circumferential direction of the stator core and are close to each other.

2. The stator winding according to claim 1, characterized in that: Each of the branch windings is arranged in an S-shape and spans one circumference along the stator core.

3. The stator winding according to claim 1, characterized in that: The conductors of corresponding pitch types in the first conductor group and the second conductor group are located in different slots of the stator core; Along the same radial direction of the stator core, the slot occupied by the first conductor group is the same as the slot occupied by the second conductor group.

4. The stator winding according to claim 1, characterized in that: The plurality of conductors arranged sequentially along the circumference of the stator core in the first conductor group are at least full-pitch conductors, long-pitch conductors and short-pitch conductors, or the plurality of conductors arranged sequentially along the circumference of the stator core in the first conductor group are full-pitch conductors.

5. The stator winding according to claim 4, characterized in that: The plurality of conductors arranged sequentially along the circumference of the stator core in the second conductor group are at least the long-pitch conductor, the short-pitch conductor, and the full-pitch conductor, or the plurality of conductors arranged sequentially along the circumference of the stator core in the second conductor group are full-pitch conductors.

6. The stator winding according to claim 4 or 5, characterized in that: The multiple conductors arranged circumferentially along the stator core in the third conductor group are the long-pitch conductor and / or the short-pitch conductor and / or the full-pitch conductor.

7. The stator winding according to claim 6, characterized in that: The full pitch is 9, the long pitch is 10, and the short pitch is 8.

8. The stator winding according to claim 1, characterized in that: The two welded ends of the conductors in the third conductor group extend along the circumferential direction of the stator core, with opposite directions and close to each other.

9. The stator winding according to claim 1, 2, 3, 4, or 5, characterized in that: On the welding end side of any phase winding, the pitch between the two welding ends of the phase weld located in two radially adjacent layers of the stator core is a full pitch and / or a long pitch and / or a short pitch.

10. The stator winding according to claim 1, characterized in that: The stator core has an even number of radial layers, which is greater than or equal to 4.

11. The stator winding according to claim 1, characterized in that: In each of the branch windings, in the same radial direction of the stator core, the lead end is connected to a welded end of a conductor in the outermost layer or the outermost-1 layer, and the output end is connected to a welded end of a conductor in the outermost-1 layer or the outermost layer.

12. A stator, characterized in that: Includes the stator winding as described in any one of claims 1-11.

13. An electric motor, characterized in that: Includes the stator as described in claim 12.

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