A hybrid-phase winding, stator, and motor

Abstract

The present invention discloses a hybrid-phase winding, which includes at least one branch. It is characterized in that each branch is composed of at least one coil loop. The coil loop includes a set of stacked windings and a set of combined conductors. P pieces of each set of the stacked windings and the combined conductors are circumferentially arranged uniformly, where P is the number of pole pairs. The stacked windings and the combined conductors are circumferentially arranged alternately and spaced apart and are connected in series in sequence. The stacked windings and the combined conductors include a hairpin conductor or at least two hairpin conductors arranged side by side in the thickness direction. The hairpin conductor includes a hairpin main body integrally bent in a U shape. The hairpin main body includes two leg portions arranged parallel to each other and a head connected to one ends of the two leg portions. One foot is provided at each of the other ends of the two leg portions. The present invention has the advantages of simple structure, convenient design, being beneficial to reducing the assembly difficulty and the production and manufacturing cost, etc.

Description

Technical Field

[0001] The invention relates to the technical field of flat wire motors, and in particular to a mixed-phase winding, a stator and a motor. Background Art

[0002] A motor (including an electric motor and a generator) is a device that converts electrical energy into mechanical energy (or mechanical energy into electrical energy) based on the principle of electromagnetic induction. It can be used as a power source or power generation device for various electrical appliances such as household appliances, various machines such as electric vehicles and electric vehicles. Motors can be divided into DC motors and AC motors according to the type of their working power supply, and AC motors can be divided into single-phase motors and multi-phase motors (such as three-phase motors, etc.). The motor includes a stator and a rotor, and windings are arranged in the stator core slots of the stator. Traditional windings are wound with round wires. Although the winding process is relatively simple, the space utilization rate in the core slot is low, the useless copper at the end is wasted a lot, and the power density is low. It is gradually replaced by flat copper wire or rectangular cross-section copper wire.

[0003] At present, the winding of flat copper wire or rectangular cross-section copper wire is mainly connected by segmented hairpin conductors bent in a U-shape as a whole, mainly by evenly arranging P hairpin conductors in the circumferential direction of the stator core and connecting them in series in sequence to form a coil ring, where P is the number of pole pairs. The coil rings are stacked and distributed in the stator core slots. When one coil ring is connected to another coil ring that is staggered in the circumferential direction, it is necessary to interchange the leg portion of the hairpin conductor at the tail of the previous coil ring with the leg portion of the hairpin conductor at the tail of the next coil ring, so as to facilitate the previous coil ring to be connected to the stator core. The legs of the hairpin conductor at the tail of the ring are directly connected to the legs of the hairpin conductor at the head of the next coil ring. However, since the hairpin conductors on the two coil rings are located at mutually dislocated positions, the hairpin conductors connected to each other are also located at mutually dislocated positions. After the legs on the two coil rings are interchanged, the head of the hairpin conductor at the tail of one coil ring may be abnormally shaped or the span may be multiplied, which results in complex winding structure, difficult design and assembly, and inconvenient production and manufacturing. Summary of the invention

[0004] In view of the above-mentioned deficiencies of the prior art, the technical problem to be solved by the present invention is: how to provide a hybrid phase winding, stator and motor with a simple structure, easy to design, and conducive to reducing assembly difficulty and production cost.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A hybrid-phase winding includes at least one branch. It is characterized in that each branch is composed of at least one coil loop. The coil loop includes a set of stacked windings and a set of combined conductors. P pieces of each set of the stacked windings and the combined conductors are circumferentially arranged evenly, where P is the number of pole pairs. The stacked windings and the combined conductors are circumferentially staggered and arranged at intervals and are connected in series in turn. The stacked windings and the combined conductors include a hairpin conductor or at least two hairpin conductors arranged side by side in the thickness direction. The hairpin conductor includes a hairpin body integrally bent in a U shape. The hairpin body includes two leg parts arranged parallel to each other and a head connected to one ends of the two leg parts. One foot is arranged at each of the other ends of the two leg parts.

[0007] Since the P stacked windings on each coil loop are distributed between two adjacent combined conductors in the circumferential direction, and the stacked windings and the combined conductors include a hairpin conductor or at least two hairpin conductors arranged side by side in the thickness direction, that is, including at least one hairpin conductor. In this way, when two coil loops misaligned in the circumferential direction of the stator are connected to each other, the combined conductor of one coil loop and the stacked winding of the other coil loop are located at corresponding positions in each layer, that is, the two hairpin conductors used for connection on the two coil loops are in a radially side-by-side arrangement state. In this way, by swapping the positions of a certain corresponding leg part of the two hairpin conductors, the head of the hairpin conductor will not be deformed or the span will not be doubled, and the connection between the two can be easily achieved, making the structure of the hairpin conductor simpler and the design more convenient, thereby reducing the assembly difficulty and manufacturing cost. As an optimization, in each branch, the leg parts where the feet for connecting the power supply and the star point are located are respectively located at the outermost layer and the second outermost layer, or the second outermost layer and the outermost layer of their respective slot positions in the assembled state.

[0008] Generally, in the assembled state of the flat wire motor, first insert the hairpin body pre-bent into a positive U shape from one end of the stator, so that the feet pass through the stator, and then use a bending device to bend the feet on the stator layer by layer in the circumferential direction, and then cut the feet to finally form the hairpin conductor. With the above structure, by setting the feet for connecting the power supply and the star point at the outermost layer and the second outermost layer, or the second outermost layer and the outermost layer, the feet for connecting the power supply or the star point located at the outermost layer can be bent outwards first, so that the corresponding feet at the second outermost layer are in the position of the outermost layer, which is convenient for the star point connecting conductor to be directly welded to the feet for connecting the star point, reducing the welding difficulty.

[0009] As an optimization, each branch is formed by connecting two coil loops. The same-phase winding includes two sets of coil loops. Each set of the coil loops includes Q coil loops located on Q continuously adjacent slot positions in the circumferential direction of the stator in the assembled state, where Q is the number of slots per pole per phase and is an integer greater than 1. In the clockwise or counterclockwise direction, the coil loop located at the A-th slot position in one set is connected in series with the coil loop located at the Q + 1 - A-th slot position in the other set to form a branch.

[0010] In this way, it is possible to avoid the formation of circulating currents between multiple branches, thereby improving the efficiency of the motor.

[0011] As an optimization, it includes a branch that includes two sets of coil loops connected in series with each other. Each set of the coil loops includes Q coil loops located on Q slot positions that are circumferentially adjacent and continuous on the stator in the assembled state. Q is the number of slots per pole per phase and is an integer greater than 1. In the same set of coil loops, two coil loops located on adjacent slot positions are connected to each other, and the pitch of the hairpin conductor on the last monomer coil of the coil loop located in the clockwise or counterclockwise direction and in front is Y + 1, such that the leg at the end of the hairpin conductor with a pitch of Y + 1 is arranged side by side with the leg on the subsequent coil loop connected thereto in the radial direction of the phase winding, and the pitch of the hairpin conductor on the last monomer coil of the coil loop located in the clockwise or counterclockwise direction and being the last is Y - Q + 1, and the pitch of all other hairpin conductors is Y.

[0012] Furthermore, in the clockwise or counterclockwise direction, in the branch located on the A-th slot position in the assembled state, among the two coil loops connected in series, the pitch of the last hairpin conductor on the previous coil loop is Y + Q - 2A + 1, the pitch of the last hairpin conductor on the subsequent coil loop is Y - Q + 2A - 1, and the pitch of all other hairpin conductors is Y; or in the clockwise or counterclockwise direction, in the branch located on the A-th slot position in the assembled state, among the two coil loops connected in series, the pitch of the first hairpin conductor on the previous coil loop is Y + Q - 2A + 1, the pitch of the first hairpin conductor on the subsequent coil loop is Y - Q + 2A - 1, and the pitch of all other hairpin conductors is Y.

[0013] In this way, it is possible to make the legs of the last hairpin conductor on the previous coil loop and the legs on the subsequent coil loop connected thereto be in a position close to each other, and they can be directly connected without using a jumper conductor, reducing the difficulty of assembly welding.

[0014] As an optimization, the overlapping winding coil includes two hairpin conductors, namely a first type of U-shaped conductor and a second type of U-shaped conductor. The first type of U-shaped conductor and the second type of U-shaped conductor are arranged side by side in the thickness direction of the hairpin body, and the leg on one leg portion of the first type of U-shaped conductor and the leg on the other leg portion of the second type of U-shaped conductor are bent in opposite directions in the width direction of the hairpin body, and the other two legs of the two are bent towards each other in the width direction of the hairpin body and connected to form the overlapping winding coil; the hairpin conductor of the combined conductor is an O-shaped conductor that is integrally annular. The two legs of the O-shaped conductor are bent towards the middle in the width direction of the hairpin body and are arranged at a staggered interval in the thickness direction of the hairpin body.

[0015] Further, the overlapping coil further includes the O-shaped conductor, the O-shaped conductor is stacked with the second type of U-shaped conductor in the thickness direction of the first type of U-shaped conductor, and the two legs of the O-shaped conductor are respectively connected to other legs adjacent in the thickness direction.

[0016] As an optimization, the hairpin conductor of the overlapping coil is an O-shaped conductor integrally in a ring shape, the two legs of the O-shaped conductor are bent towards the middle and offset at intervals in the width direction of the hairpin body; the combined conductor includes a hairpin conductor, which is a waveform conductor with two legs bent in opposite directions along the width direction of the hairpin body.

[0017] Further, the leg parts where one pair of legs connected to each other between the overlapping coil and the combined conductor are respectively located in the second outermost layer and the outermost layer, or the outermost layer and the second outermost layer of their respective slots during assembly.

[0018] As an optimization, at least one hairpin conductor in the branch is two single-leg conductors correspondingly arranged at the position where the leg part is located, one end of the single-leg conductor is a leg, and this leg is consistent with the leg of the hairpin conductor at this corresponding position, and the other end is a connection end.

[0019] A stator, characterized in that it includes a stator core and a multi-phase hybrid-phase winding installed on the stator core as described above, power terminals are respectively connected to the connection ends for connecting the power supply on the multi-phase hybrid-phase windings, and the connection ends for connecting the star point on the multi-phase phase windings are welded and connected through a star point connection conductor.

[0020] A motor, characterized in that it includes the stator as described above.

[0021] In summary, the present invention has the advantages of simple structure, convenient design, and being beneficial to reducing the assembly difficulty and production and manufacturing costs. Description of the Drawings

[0022] Figure 1 It is a schematic structural diagram of the stator in Embodiment 1.

[0023] Figure 2 It is a schematic structural diagram of the method structure at the circled part in Embodiment 1.

[0024] Figure 3 It is a schematic structural diagram of the three-phase winding in Embodiment 1.

[0025] Figure 4 It is a schematic structural diagram of a phase winding in Embodiment 1.

[0026] Figure 5 andFigure 6 Schematic structural diagram of a coil loop on a branch in Embodiment 4.

[0027] Figure 7 Schematic structural diagram of the connection between a stacked coil and a combined conductor.

[0028] Figure 8 Schematic structural diagram of the connection between a stacked coil and a combined conductor in Embodiment 2.

[0029] Figure 9 Schematic structural diagram of the stator in Embodiment 3.

[0030] Figure 10 Schematic structural diagram of a phase winding in Embodiment 3.

[0031] Figure 11 Schematic structural diagram of the stator in Embodiment 4.

[0032] Figure 12 Schematic structural diagram of the method structure at the circled part in Embodiment 4.

[0033] Figure 13 Schematic structural diagram of the three-phase winding in Embodiment 4.

[0034] Figure 14 Schematic structural diagram of a phase winding in Embodiment 4.

[0035] Figure 15 and Figure 16 Schematic structural diagram of a coil loop on a branch in Embodiment 4.

[0036] Figure 17 Schematic structural diagram of the connection between a stacked coil and a combined conductor.

[0037] Figure 18 Schematic structural diagram of Embodiment 5.

[0038] Figure 19 Schematic structural diagram of Embodiment 6. Specific implementation manners

[0039] The following further elaborates on the specific implementation manners of the present invention in conjunction with the embodiments.

[0040] Embodiment 1: As Figures 1 to 3 shown, a motor includes a stator, the stator includes a stator core 8 and three-phase phase windings mounted on the stator core 8. One ends of each branch on the phase windings are connected to each other through a star-point connection conductor 7, and the other ends of two parallel branches on each phase winding are connected in parallel through a power supply lead-out conductor 6.

[0041] The stator core 8 includes a main body that is integrally cylindrical. A plurality of stator core slots that open inward in the radial direction are circumferentially provided on the inner ring of the stator core 8. The lower end of the stator core slot is the insertion side (or crown side), and the upper end is the connection side.

[0042] As Figure 4 shown, in this embodiment, each phase winding includes two branches arranged in parallel. Each branch is formed by connecting two coil rings. As Figure 5 and Figure 6 shown, the coil ring includes a set of stacked coils and a set of combined conductors. P pieces of each set of the stacked coils and the combined conductors are circumferentially arranged in a uniform distribution, where P is the number of pole pairs. In this embodiment, the number of pole pairs P = 4.

[0043] The same phase winding includes two sets of coil rings. Each set of the coil rings includes 2 coil rings located on 2 circumferentially adjacent slot positions in the assembled state. In this embodiment, the number of slots per pole per phase is Q = 2. The coil ring located at the 1st slot position in the clockwise direction in one set of coil rings and the coil ring located at the 2nd slot position in the clockwise direction in the other set of coil rings are connected in series to form a branch.

[0044] In this embodiment, the stacked coils and the combined conductors on each coil ring are circumferentially arranged in an alternating and spaced manner and are connected in series in sequence; as Figure 7 shown, a stacked coil is also provided at the position between two circumferentially adjacent combined conductors in a set of combined conductors.

[0045] Meanwhile, both the stacked coil 4 and the combined conductor 5 include a hairpin conductor. The hairpin conductor includes a hairpin main body that is integrally U-shaped bent. The hairpin main body includes two leg portions arranged in parallel with each other and a head connected to one end of the two leg portions. A foot is provided at the other end of each of the two leg portions; and the hairpin conductor of the stacked coil is an O-shaped conductor that is integrally annular. The two feet of the O-shaped conductor are bent toward the middle in the width direction of the hairpin main body and are arranged at a staggered interval in the thickness direction of the hairpin main body; the hairpin conductor of the combined conductor is a waveform conductor in which the two feet are bent in opposite directions in the width direction of the hairpin main body.

[0046] In the clockwise or counterclockwise direction, in the branch located at the A-th slot in the assembled state, among the two coil loops connected in series, the pitch of the last hairpin conductor on the previous coil loop is Y + Q - 2A + 1, and the pitch of the last hairpin conductor on the subsequent coil loop is Y - Q + 2A - 1, and the pitch of all other hairpin conductors is Y; or in the clockwise or counterclockwise direction, in the branch located at the A-th slot in the assembled state, among the two coil loops connected in series, the pitch of the first hairpin conductor on the previous coil loop is Y + Q - 2A + 1, and the pitch of the first hairpin conductor on the subsequent coil loop is Y - Q + 2A - 1, and the pitch of all other hairpin conductors is Y.

[0047] In this embodiment, when viewed in the direction towards the connection side, in the clockwise direction, in the branch located at the 1st slot in the assembled state, among the two coil loops connected in series, the pitch of the last hairpin conductor on the previous coil loop is Y + 1, and the pitch of the last hairpin conductor on the subsequent coil loop is Y - 1, and the pitch of all other hairpin conductors is Y; in the branch located at the 2nd slot in the assembled state, among the two coil loops connected in series, the pitch of the last hairpin conductor on the previous coil loop is Y - 1, and the pitch of the last hairpin conductor on the subsequent coil loop is Y + 1, and the pitch of all other hairpin conductors is Y.

[0048] In this way, the feet of the last hairpin conductor on the previous coil loop and the feet of the subsequent coil loop connected thereto on the same branch can be located in positions close to each other, and they can be directly connected without using a jumper conductor, reducing the difficulty of assembly welding.

[0049] As Figure 5 shown, one end of the overlapping coil and the leg portions of the pair of feet where the combined conductor is interconnected are respectively located at the outermost layer and the second outermost layer of their respective slots during assembly. At the same time, in this embodiment, on each branch, the feet located on the leg portions at the second outermost layer and the outermost layer of their respective slots in the assembled state are selected to connect to the power supply and the star point. As Figure 1 and Figure 2 shown, the leg connected to the star point connecting conductor 7 is located at the second outermost layer, and the leg connected to the power supply lead-out conductor 6 is located at the outermost layer. During specific implementation, the power supply lead-out conductor 6 can also be welded to the leg located at the second outermost layer, and the star point connecting conductor 7 can be welded to the leg located at the outermost layer.

[0050] By setting the legs connecting the power supply and the neutral point on the outermost layer and the second outermost layer, or the second outermost layer and the outermost layer, the legs on the outermost layer for connecting the power supply or the neutral point can be bent outwards first, so that the corresponding legs on the second outermost layer are in the position of the outermost layer, facilitating the direct welding of the neutral point connecting conductor and the legs for connecting the neutral point, and reducing the welding difficulty.

[0051] Embodiment 2 is different from Embodiment 1 in that, as Figure 8 shown, the stacked winding coil includes 2 hairpin conductors, and is 2 O-shaped conductors arranged in a stacked and series-connected manner.

[0052] Embodiment 3 is different from Embodiment 1 in that Q = 3. Since each branch is formed by connecting two coil loops, and the same-phase winding includes two sets of coil loops, each set of the coil loops includes 3 coil loops located on 3 circumferentially adjacent slot positions of the stator in the assembled state. Among them, the coil loop located in the 1st slot position in the clockwise direction in one set of coil loops is connected in series with the coil loop located in the 3rd slot position in the clockwise direction in the other set of coil loops to form a branch; and the coil loop located in the 2nd slot position in the clockwise direction in one set of coil loops is connected in series with the coil loop located in the 2nd slot position in the clockwise direction in the other set of coil loops to form a branch; the coil loop located in the 3rd slot position in the clockwise direction in one set of coil loops is connected in series with the coil loop located in the 1st slot position in the clockwise direction in the other set of coil loops to form a branch, so that the phase winding has 3 parallel branches, as Figure 9 and Figure 10 shown.

[0053] Embodiment 4, as Figures 11 to 13 shown, a motor includes a stator, the stator includes a stator core 8 and three-phase phase windings installed on the stator core 8. One ends of each branch on the phase windings are connected to each other through a neutral point connecting conductor 7, and the other ends of two parallel branches on each phase winding are connected in parallel through a power supply lead-out conductor 6.

[0054] The stator core 8 includes a main body that is integrally cylindrical. A plurality of stator core slots opening radially inwards are arranged along the circumferential direction on the inner circle of the stator core 8. The lower end of the stator core slot is the insertion side (or called the crown side), and the upper end is the connection side.

[0055] As Figure 14 shown, in this embodiment, each phase winding includes two parallel branches, and each branch is formed by connecting two coil loops, as Figure 15 and Figure 16 shown. The coil loop includes a set of stacked winding coils and a set of combined conductors. Each set of the stacked winding coils and the combined conductors are both arranged circumferentially with P pieces, and P is the number of pole pairs. In this embodiment, the number of pole pairs P = 4.

[0056] The same-phase winding includes two groups of coil rings. Each group of coil rings includes two coil rings located on two circumferentially adjacent slot positions in the assembled state. In this embodiment, the number of slots per pole per phase is Q = 2. The coil ring located in the first slot position in the clockwise direction in one group of coil rings is connected in series with the coil ring located in the second slot position in the clockwise direction in the other group of coil rings to form a branch.

[0057] In this embodiment, the stacked windings and the combined conductors on each coil ring are arranged alternately at intervals in the circumferential direction and are connected in series in sequence. As Figure 17 shown, a stacked winding is also arranged at the position between two circumferentially adjacent combined conductors in a group of combined conductors.

[0058] At the same time, the stacked winding 4 includes two hairpin conductors, the combined conductor 5 includes one hairpin conductor, the hairpin conductor includes a hairpin body bent in an overall U shape, the hairpin body includes two leg portions arranged in parallel with each other and a head connected to one ends of the two leg portions, and a foot is arranged at each of the other ends of the two leg portions.

[0059] In this embodiment, the two hairpin conductors of the stacked winding are respectively a first type of U-shaped biased conductor and a second type of U-shaped biased conductor. The first type of U-shaped biased conductor and the second type of U-shaped biased conductor are arranged side by side in the thickness direction of the hairpin body, and the foot on one leg portion of the first type of U-shaped biased conductor and the foot on the other leg portion of the second type of U-shaped biased conductor are bent in opposite directions in the width direction of the hairpin body, and the other two feet of the two are bent towards each other in the width direction of the hairpin body and are connected to form the stacked winding.

[0060] In this embodiment, the hairpin conductor of the combined conductor 5 is an O-shaped conductor with an overall ring shape. The two feet of the O-shaped conductor are bent towards the middle in the width direction of the hairpin body and are arranged at staggered intervals in the thickness direction of the hairpin body.

[0061] In the clockwise or counterclockwise direction, in the branch located in the A-th slot position in the assembled state, among the two coil rings connected in series with each other, the pitch of the last hairpin conductor on the previous coil ring is Y + Q - 2A + 1, the pitch of the last hairpin conductor on the subsequent coil ring is Y - Q + 2A - 1, and the pitches of all other hairpin conductors are Y; or in the clockwise or counterclockwise direction, in the branch located in the A-th slot position in the assembled state, among the two coil rings connected in series with each other, the pitch of the first hairpin conductor on the previous coil ring is Y + Q - 2A + 1, the pitch of the first hairpin conductor on the subsequent coil ring is Y - Q + 2A - 1, and the pitches of all other hairpin conductors are Y.

[0062] In this embodiment, when viewed in the direction towards the connection side and in the clockwise direction, among the branches located in the first slot position in the assembled state, for the two coil loops connected in series, the pitch of the last hairpin conductor on the previous coil loop is Y + 1, and the pitch of the last hairpin conductor on the subsequent coil loop is Y - 1, and the pitch of all other hairpin conductors is Y; among the branches located in the second slot position in the assembled state, for the two coil loops connected in series, the pitch of the last hairpin conductor on the previous coil loop is Y - 1, and the pitch of the last hairpin conductor on the subsequent coil loop is Y + 1, and the pitch of all other hairpin conductors is Y.

[0063] In this way, the legs of the last hairpin conductor on the previous coil loop and the legs of the subsequent coil loop connected thereto on the same branch can be located in positions close to each other, and they can be directly connected without using a jumper conductor, reducing the difficulty of assembly welding.

[0064] As Figure 15 shown, one end of the stacked coil and the leg portions of the pair of legs where the combined conductor is connected to each other are respectively located in the outermost layer and the second outermost layer of their respective slot positions during assembly. At the same time, in this embodiment, on each branch, the legs located in the second outermost layer and the outermost layer of their respective slot positions in the assembled state are selected to connect to the power supply and the star point. As Figure 11 and Figure 12 shown, the leg connected to the star point connection conductor 7 is located in the second outermost layer, and the leg connected to the power supply lead-out conductor 6 is located in the outermost layer. During specific implementation, the power supply lead-out conductor 6 can also be welded to the leg located in the second outermost layer, and the star point connection conductor 7 can be welded to the leg located in the outermost layer.

[0065] By setting the legs connecting the power supply and the star point in the outermost layer and the second outermost layer, or the second outermost layer and the outermost layer, the leg located in the outermost layer for connecting the power supply or the star point can be bent outwards first, so that the corresponding leg in the second outermost layer is in the position of the outermost layer, facilitating the direct welding of the star point connection conductor to the leg for connecting the star point and reducing the difficulty of welding.

[0066] Embodiment 5: The difference from Embodiment 4 is that, as Figure 18 shown, the combined conductor includes 2 hairpin conductors, and they are 2 O-shaped conductors arranged in a stacked and series-connected manner.

[0067] Embodiment 6: The difference from Embodiment 5 is that, as Figure 19 shown, the stacked coil also includes an O-shaped conductor. The O-shaped conductor is stacked with the second type of U-shaped conductor in the thickness direction of the first type of U-shaped conductor, and the two legs of the O-shaped conductor are respectively connected to other adjacent legs in the thickness direction.

[0068] Embodiment 7: The difference from Embodiment 1 and Embodiment 4 is that the coil rings on the two branches are connected in sequence to form one branch. Specifically, the branch includes two groups of coil rings connected in series with each other. Each group of coil rings includes Q coil rings located on Q slot positions that are circumferentially adjacent and continuous on the stator in the assembled state. Q is the number of slots per pole per phase and is an integer greater than 1. In the same group of coil rings, two coil rings located on adjacent slot positions are connected to each other, and the pitch of the hairpin conductor on the last monomer coil of the coil ring that is in the clockwise or counterclockwise direction and is previous is Y + 1, so that the leg at the end of the hairpin conductor with a pitch of Y + 1 and the leg connected to it on the subsequent coil ring are arranged side by side in the radial direction of the phase winding. The pitch of the hairpin conductor on the last monomer coil of the coil ring that is in the clockwise or counterclockwise direction and is the last is Y - Q + 1, and the pitch of all other hairpin conductors is Y.

[0069] For a phase winding with Q = 2, in the same group of coil rings, two coil rings located on adjacent slot positions are connected to each other, and the pitch of the hairpin conductor on the last monomer coil of the coil ring that is in the clockwise or counterclockwise direction and is previous is Y + 1, so that the leg at the end of the hairpin conductor with a pitch of Y + 1 and the leg connected to it on the subsequent coil ring are arranged side by side in the radial direction of the phase winding. The pitch of the hairpin conductor on the last monomer coil of the coil ring that is in the clockwise or counterclockwise direction and is the last is Y - 1, and the pitch of all other hairpin conductors is Y.

[0070] Since the leg at the end of the hairpin conductor with a pitch of Y + 1 and the leg connected to it on the subsequent coil ring are arranged side by side in the radial direction of the phase winding, they can be directly welded in series without additional jumper conductors, making the manufacturing more convenient.

[0071] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A hybrid-phase winding includes at least one branch, characterized in that, Each branch is composed of at least one coil loop. The coil loop includes a set of stacked coils and a set of combined conductors. There are P of each set of the stacked coils and the combined conductors evenly distributed circumferentially, where P is the number of pole pairs. The stacked coils and the combined conductors are arranged alternately and circumferentially and are connected in series in sequence. The stacked coils include at least two hairpin conductors arranged side by side in the thickness direction. The combined conductors include one hairpin conductor or at least two hairpin conductors arranged side by side in the thickness direction. The hairpin conductor includes a hairpin body bent in an overall U shape. The hairpin body includes two parallel leg portions and a head connected to one ends of the two leg portions. Each of the other ends of the two leg portions is provided with a foot. The stacked coils include two hairpin conductors, namely a first type of U-shaped conductor and a second type of U-shaped conductor. The first type of U-shaped conductor and the second type of U-shaped conductor are arranged side by side in the thickness direction of the hairpin body. And the foot on one leg portion of the first type of U-shaped conductor and the foot on the other leg portion of the second type of U-shaped conductor are bent in opposite directions in the width direction of the hairpin body, and the other two feet are bent towards each other in the width direction of the hairpin body and are connected to form the stacked coils. The hairpin conductor of the combined conductors is an O-shaped conductor in an overall ring shape. The two feet of the O-shaped conductor are bent towards the middle in the width direction of the hairpin body and are arranged staggeredly in the thickness direction of the hairpin body. In each branch, the leg portions where the feet for connecting the power supply and the neutral point are located are respectively located in the outermost layer and the second outermost layer, or the second outermost layer and the outermost layer of their respective slots in the assembled state.

2. The hybrid-phase winding according to claim 1, wherein Each branch is formed by connecting two coil loops. The same-phase winding includes two sets of coil loops. Each set of the coil loops includes Q coil loops located on Q slots that are circumferentially continuously adjacent to each other in the stator in the assembled state, where Q is the number of slots per pole per phase and is an integer greater than 1. In the clockwise or counterclockwise direction, the coil loop located in the A-th slot in one set is connected in series with the coil loop located in the (Q + 1 - A)-th slot in the other set to form a branch.

3. The hybrid-phase winding according to claim 1, wherein It includes a branch, and this branch includes two sets of coil loops connected in series with each other. Each set of the coil loops includes Q coil loops located on Q slots that are circumferentially continuously adjacent to each other in the stator in the assembled state, where Q is the number of slots per pole per phase and is an integer greater than 1. In the same set of coil loops, two coil loops located in adjacent slots are connected to each other. And in the clockwise or counterclockwise direction, the pitch of the hairpin conductor on the last single coil of the coil loop in the front is Y + 1, so that the foot at the end of the hairpin conductor with a pitch of Y + 1 is arranged side by side with the foot connected to it on the subsequent coil loop in the radial direction of the phase winding. And in the clockwise or counterclockwise direction, the pitch of the hairpin conductor on the last single coil of the last coil loop is Y - Q + 1, and the pitches of all other hairpin conductors are Y.

4. The hybrid-phase winding according to claim 2, wherein In the clockwise or counterclockwise direction, in the branch located in the A-th slot in the assembled state, among the two coil loops connected in series, the pitch of the last hairpin conductor on the previous coil loop is Y + Q - 2A + 1, and the pitch of the last hairpin conductor on the subsequent coil loop is Y - Q + 2A - 1, and the pitch of all other hairpin conductors is Y; or in the clockwise or counterclockwise direction, in the branch located in the A-th slot in the assembled state, among the two coil loops connected in series, the pitch of the first hairpin conductor on the previous coil loop is Y + Q - 2A + 1, and the pitch of the first hairpin conductor on the subsequent coil loop is Y - Q + 2A - 1, and the pitch of all other hairpin conductors is Y.

5. The hybrid-phase winding according to claim 1, wherein The overlapping coil further includes the O-shaped conductor, the O-shaped conductor is stacked with the second type of U-shaped conductor in the thickness direction of the first type of U-shaped conductor, and the two legs of the O-shaped conductor are respectively connected to other legs adjacent in the thickness direction.

6. The hybrid-phase winding according to claim 1, wherein The combined conductor includes two of the O-shaped conductors, and the O-shaped conductors are stacked and connected in series.

7. The hybrid-phase winding according to claim 1, characterized in that, Among the legs where a pair of legs where the overlapping coil and the combined conductor are connected to each other are respectively located in the sub-outer layer and the outermost layer, or the outermost layer and the sub-outer layer of their respective slots during assembly.

8. The hybrid-phase winding according to claim 1, wherein, At least one hairpin conductor in the branch is two single-leg conductors correspondingly arranged at the position where its leg is located. One end of the single-leg conductor is a leg, and this leg is consistent with the leg of the hairpin conductor at this corresponding position, and the other end is a connection end.

9. A stator, characterized in that, It includes a stator core and a multi-phase hybrid-phase winding as described in any one of claims 1 to 8 mounted on the stator core. Power terminals are respectively connected to the connection ends for connecting the power supply on the multi-phase hybrid-phase winding, and the connection ends for connecting the star point on the multi-phase winding are welded together through a star point connection conductor.

10. A motor, characterized in that, It includes a stator as described in claim 9.

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