CN110611387A

CN110611387A - Phase winding, stator and motor

Info

Publication number: CN110611387A
Application number: CN201911083829.1A
Authority: CN
Inventors: 黄朝东
Original assignee: Chongqing Zongshen Electric Power Technology Co Ltd
Current assignee: Chongqing Zongshen Electric Power Technology Co Ltd
Priority date: 2019-11-07
Filing date: 2019-11-07
Publication date: 2019-12-24

Abstract

The invention discloses a phase winding, a stator and a motor, wherein each branch of the phase winding is formed by connecting at least one coil ring, each coil ring is formed by sequentially connecting P single coils, P is the number of pole pairs of the phase winding, each single coil comprises a first type of inclined U-shaped conductor and a second type of inclined U-shaped conductor, one first type of inclined U-shaped conductor or one second type of inclined U-shaped conductor in each branch is two correspondingly arranged single-pin conductors, one ends of the two single-pin conductors, corresponding to the heads of the single coils, are mutually close connecting ends, and the other ends of the two single-pin conductors are support legs bent along the circumferential direction; the support legs of the two single-pin conductors are respectively connected with the support legs of the adjacent first type of U-shaped conductors or the second type of U-shaped conductors. The phase winding, the stator and the motor have the advantages of reasonable structural design, small assembling and welding difficulty, contribution to reducing the assembling and welding difficulty, reducing the use of useless copper, improving the assembling efficiency and the assembling quality and the like.

Description

Phase winding, stator and motor

Technical Field

The invention relates to the technical field of motors, in particular to a phase winding, a stator and a motor.

Background

The motor (including the motor and the generator) is a device for converting electric energy into mechanical energy (or converting mechanical energy into electric energy) according to the principle of electromagnetic induction, and can be used as a power source or a power generation device of various electric appliances such as household appliances, various machines such as electric vehicles and electric automobiles. The motors can be classified into dc motors and ac motors according to the kinds of their operating power sources, and the ac motors can be classified into single-phase motors and multi-phase motors (e.g., three-phase motors). The motor comprises a stator and a rotor, and a winding is arranged in a stator core slot of the stator. The existing motor winding forms comprise a wave winding and a lap winding, and for a segmented hairpin winding motor adopting a flat copper wire or a rectangular-section copper wire, the use of the lap winding can cause excessive jumper conductors between lap windings and increase the use amount of invalid copper, so that the motor of the type generally uses the wave winding.

In the prior art, a multilayer wave winding is usually adopted, and the winding structure needs conductors with various special shapes and various long spans or short spans to realize the bridging between the layers of the hairpin conductors, so that the hairpin conductors are various in types, the assembly difficulty is increased, and the cost is increased.

Disclosure of Invention

Aiming at the defects of the prior art, the technical problems to be solved by the invention are as follows: how to provide a phase winding, stator and motor that structural design is reasonable, and the hairpin kind is few, and is with low costs, is favorable to reducing the assembly degree of difficulty, improves assembly efficiency and assembly quality.

In order to solve the technical problems, the invention adopts the following technical scheme:

the phase winding is characterized by comprising at least one branch, each branch is formed by connecting at least one coil ring, each coil ring comprises P single coils which are sequentially connected, and P is the number of pole pairs;

the single coil comprises at least two hairpin conductors, each hairpin conductor comprises a hairpin main body which is bent integrally in a U shape, each hairpin main body comprises two leg parts which are arranged in parallel and a head part connected to one end of each leg part, and the other end of each leg part is provided with a support leg; the hairpin conductors on the same single coil are sequentially connected in series to form a single coil which is annular as a whole, and the single coil is provided with two support legs which deflect and bend along the direction of the opposite direction in the width direction;

one hairpin conductor on at least one monomer coil in the branch road is two single-pin conductors that correspond to setting up on its shank position, the one end of single-pin conductor is the stabilizer blade, and this stabilizer blade is unanimous with the stabilizer blade of the hairpin conductor on this corresponding position, and the other end is the link.

Generally, in an assembly state of a flat wire motor, a hairpin main body which is pre-bent into a regular U shape is inserted from one end of a stator, so that a support leg penetrates out of the stator, then the support leg on the stator is bent layer by layer along the circumferential direction by adopting bending equipment, and then the support leg is cut, so that the hairpin conductor is finally formed. Each branch circuit is annular in the circumferential direction of the stator and is provided with a power supply connecting end used for connecting a power supply and a star point connecting end used for connecting star points. Because a hairpin conductor on a monomer coil in every branch road is for corresponding two single-pin conductors that set up on its shank position, under the assembled state, the both ends of single-pin conductor are located the both ends of stator respectively, and one of them end is the stabilizer blade, and this stabilizer blade is unanimous with the deflection direction of other stabilizer blades that are located radially the same layer. Because two single-pin conductors respectively have a connecting end and are positioned at the other end of the end where the supporting leg is positioned, the connecting ends of the two single-pin conductors can be respectively used as a power supply connecting end and a star point connecting end. Because the stabilizer blade of all hairpin conductors and single-pin conductor is located same one end of stator for this end need not to consider the connection of being qualified for the next round of competitions of motor, under the assembled state, can carry out successive layer with all stabilizer blades and buckle, then cut in unison, makes to cut more conveniently, and cuts more neatly, makes things convenient for follow-up automatic welding operation that carries on, thereby improves the efficiency of assembly, improves the assembly quality.

Preferably, the hairpin conductor includes the first type of partial U-shaped conductor and the second type of partial U-shaped conductor, the legs of the first type of partial U-shaped conductor and the legs of the second type of partial U-shaped conductor deflect and bend in opposite directions in the width direction of the hairpin body, and the first type of partial U-shaped conductor and the second type of partial U-shaped conductor are arranged side by side in the thickness direction of the hairpin body, so that the legs deflecting and bending outward in the first type of partial U-shaped conductor and the legs deflecting and bending outward in the second type of partial U-shaped conductor deviate from each other, and the legs deflecting and bending toward the middle part in the first type of partial U-shaped conductor and the legs deflecting and bending toward the middle part in the second type of partial U-shaped conductor are connected to form the single coil.

Therefore, each single coil consists of two types of hairpin conductors, namely a first type of inclined U-shaped conductor and a second type of inclined U-shaped conductor, one hairpin conductor in one branch is two single-pin conductors which are correspondingly arranged, and the two single-pin conductors are respectively used for connecting a star point and a power supply, so that the structures of the two single-pin conductors are different.

Furthermore, the hairpin conductor also comprises an O-shaped conductor which is annular as a whole, and the two support legs of the O-shaped conductor deflect and bend towards the middle part in the width direction of the hairpin body and are arranged at intervals in a staggered manner in the thickness direction of the hairpin body; the O-shaped conductor and the second type of inclined U-shaped conductor are arranged in a stacked mode in the thickness direction of the first type of inclined U-shaped conductor, two support legs forming the O-shaped conductor are respectively connected with other adjacent support legs in the thickness direction, and the support legs deflected and bent outwards in the first type of inclined U-shaped conductor and the support legs deflected and bent outwards in the second type of inclined U-shaped conductor are mutually deviated.

Therefore, the O-shaped conductor is added, so that only one conductor is added to one branch, the number of wires of each single coil can be increased under the condition of less hairpin types, and the high-speed motor is suitable for being used in a high-speed motor.

As optimization, the phase winding comprises one branch or two branches arranged in parallel, in the same phase winding, Q coil rings which are positioned on Q groove positions continuously adjacent to each other in the circumferential direction of the stator in an assembly state are sequentially connected in series to form a coil ring group, and Q is the number of each phase groove of each pole and is an integer; two in the same phase winding each have a hairpin conductor for corresponding two single-pin conductors that set up on its shank position in the monomer coil of interconnect in the coil loop group, the one end of single-pin conductor is the stabilizer blade, and this stabilizer blade is unanimous with the stabilizer blade of the hairpin conductor on this corresponding position, and the other end is the link.

Because the single coils mutually connected in each coil loop group are respectively provided with one hairpin conductor as two single-pin conductors correspondingly arranged at the positions of the leg parts, one phase winding is provided with four single-pin conductors. In the case of a branch, two connecting ends of the four single-pin conductors are connected with each other, so that the two coil loop groups can be connected in series to form a branch, and the other two connecting ends are respectively used for connecting a star point and a power supply. And under the condition of two branches, each coil loop group is a branch, two single-pin conductors on each branch are respectively used for connecting a star point and a power supply, because the two branches are arranged in parallel, connecting ends used for connecting the star points on the two branches are finally required to be connected with each other, and the connecting ends used for connecting the power supply are also required to be connected with each other, namely, the connected single coils can be single coils used for connecting the star points and can also be single coils both used for connecting the power supply.

Furthermore, two single-pin conductors on the same single coil are combined into a lead conductor group, and the single coils where the lead conductor groups on the two coil ring groups in the same phase winding are arranged adjacently in the circumferential direction of the phase winding where the single coils are located.

Because two lead wire conductor groups are in two adjacent monomer coil position departments of circumference for the distance between the power connection end in two lead wire conductor groups is nearer with between the star point link, thereby has shortened the cross-over connection conductor that is used for connecting power connection end and connects the star point link, reduces the use amount of useless copper.

Furthermore, two coil ring groups in the same phase winding are connected in series to form a branch circuit or connected in parallel to form two branch circuits; the connecting ends of the two single-pin conductors which are used for being connected in series in the two coil ring groups which are connected in series are connected in a welding way, or the two single-pin conductors which are used for being connected in series in the two coil ring groups which are connected in series are integrally bent and formed large-span hairpin conductors which are correspondingly arranged at the positions of the leg parts of the two single-pin conductors; the connecting ends of the two single-pin conductors used for connecting the power supply in the two coil ring groups which are connected in parallel are connected in a welding mode, or the two single-pin conductors used for connecting the power supply in the two coil ring groups which are connected in parallel are integrally bent and formed large-span hairpin conductors which are correspondingly arranged at the positions of the leg parts of the two coil ring groups.

Furthermore, each coil ring group comprises Q coil rings which are positioned on Q circumferentially continuous adjacent slots of the stator in an assembly state, wherein Q is the number of slots of each phase of each pole and is an integer larger than 1; in the same coil ring group, two coil rings positioned on adjacent slot positions are mutually connected, and the pitch of the hairpin conductor positioned on the last single coil of the previous coil ring in the clockwise or anticlockwise direction is Y +1, so that a support leg positioned at the end part of the hairpin conductor with the pitch of Y +1 and a support leg connected with the hairpin conductor on the next coil ring are arranged side by side in the radial direction of the phase winding; the pitch of the hairpin conductors on the last individual coil of the last coil loop in the clockwise or counterclockwise direction is Y-Q +1, and the pitch of all other hairpin conductors is Y.

By adopting the structure, the coil rings positioned on the Q groove positions continuously adjacent to the stator in the circumferential direction and the two coil rings connected in series mutually are arranged in parallel in the radial direction of the phase winding, and the output end supporting leg of the previous coil ring and the input end supporting leg of the next coil ring in the current direction can be directly welded and connected in series without adopting a cross-over conductor. Because the inside connection stabilizer blade of every coil loop all is on the adjacent position of same trench, through above-mentioned structure, just so that the stabilizer blade of whole phase winding all need not the cross-over connection conductor, just can weld and link to each other, greatly reduced the whole assembly degree of difficulty and the welding degree of difficulty of motor, be favorable to improving assembly quality and assembly efficiency.

As optimization, the phase winding comprises four branches arranged in parallel, each branch comprises a coil ring, the coil ring is formed by sequentially connecting P single coils, P is a pole pair number and is an even number; each coil ring is provided with at least one pair of hairpin conductors with the pitch of Y +1 and at least one pair of hairpin conductors with the pitch of Y-1, the hairpin conductors with the pitch of Y +1 and the hairpin conductors with the pitch of Y-1 are uniformly distributed along the circumferential direction, and the pitches of all other hairpin conductors are Y; the deflection directions of the stand bars of the hairpin conductors with the pitch of Y +1 and the stand bars of the hairpin conductors with the pitch of Y-1 in the circumferential direction of the coil ring are the same; the hairpin conductor with the pitch of Y +1 on one branch and the hairpin conductor with the pitch of Y-1 on the other branch on the circumferentially adjacent slot are positioned in the circumferentially adjacent slot.

Due to the fact that two branches with the same current direction are usually arranged in circumferentially adjacent slots, a mechanical angle of 360/Z degrees is always formed between the two branches, Z is the total number of slots, and therefore a potential difference exists between the two branches to form a circular current. Half of the single coils on the two branches move a slot pitch in opposite directions in the circumferential direction, namely, half of the single coils on the two branches have a mechanical angle of +360/Z degrees, and the other half of the single coils on the two branches have a mechanical angle of-360/Z degrees, so that potential difference between the two branches can be prevented from forming a circular current.

Furthermore, two single-pin conductor groups on the same single coil are lead conductor groups, two branches located in circumferentially adjacent slots of the stator in an assembly state are in one group, the single coils where the lead conductor groups on the two branches in the same group are located in circumferentially adjacent slots on the phase winding where the lead conductor groups are located, and the single coils where the lead conductor groups on the two branches in one group are located are adjacent to the single coils where the lead conductor groups on the two branches in the other group in the circumferential direction of the phase winding where the lead conductor groups are located.

And optimally, the deflection directions and the pitches of the legs of the hairpin conductors corresponding to the single-leg conductors on the branches are equal.

That is, the single-pin conductors on each branch are arranged corresponding to the first type of inclined U-shaped conductors with consistent pitches; or the second type of inclined U-shaped conductors which are consistent with the pitches are arranged correspondingly; or both are arranged corresponding to the O-shaped conductors with a consistent pitch. Therefore, the types of conductors adopted by all branches in all phase windings are less, and the die sinking cost is reduced.

Furthermore, two leg portions of the first type of inclined U-shaped conductor and the second type of inclined U-shaped conductor are arranged in a staggered manner in the thickness direction of the hairpin main body, the second type of inclined U-shaped conductor is positioned between the two leg portions of the first type of inclined U-shaped conductor in the thickness direction of the first type of inclined U-shaped conductor, and the head portion of the second type of inclined U-shaped conductor is wrapped in the head portion of the first type of inclined U-shaped conductor; in an assembly state, the leg part positioned at the same slot position in the stator is divided into a first layer of conductor, a second layer of conductor, a third layer of conductor and a fourth layer of conductor from outside to inside in the radial direction; the two leg parts of the first type of the inclined U-shaped conductor are respectively a first layer conductor and a fourth layer conductor of the slot position where the first type of the inclined U-shaped conductor is located, and the two leg parts of the second type of the inclined U-shaped conductor are respectively a second layer conductor and a third layer conductor of the slot position where the second type of the inclined U-shaped conductor is located.

Furthermore, two leg portions of the first type of inclined U-shaped conductor and the second type of inclined U-shaped conductor are arranged in a staggered manner in the thickness direction of the hairpin main body, the second type of inclined U-shaped conductor is positioned between the two leg portions of the first type of inclined U-shaped conductor in the thickness direction of the first type of inclined U-shaped conductor, and the head portion of the second type of inclined U-shaped conductor is wrapped in the head portion of the first type of inclined U-shaped conductor; the O-shaped conductor is positioned between two leg parts of the first type of the inclined U-shaped conductor in the thickness direction of the first type of the inclined U-shaped conductor and is arranged in a laminating manner with the second type of the inclined U-shaped conductor; the leg part at the same slot position on the stator is divided into a first layer conductor and a second layer conductor … … A-layer conductor from outside to inside in the radial direction, wherein A is an even number more than 4; the two leg parts of the first type of U-shaped conductor are respectively a first layer conductor and an A layer conductor of a slot position where the first type of U-shaped conductor is respectively located, the two leg parts of the second type of U-shaped conductor are respectively a second layer conductor and a third layer conductor or an (A-1) layer conductor and an (A-2) layer conductor of the slot position where the second type of U-shaped conductor is respectively located, the leg parts of the O-shaped conductor are respectively a 2n layer conductor and a 2n +1 layer conductor or an A-2n layer conductor and an A-2n +1 layer conductor of the slot position where the O-shaped conductor is located, and n is more than or equal to 2 and less than or equal to A/2-1.

A stator is characterized by comprising a stator core and multiple phases of phase windings which are installed on the stator core and are as described above, wherein power terminals are respectively connected to the connecting ends of the multiple phases of phase windings, which are used for connecting power supplies, the connecting ends of the multiple phases of phase windings, which are used for connecting star points, are connected through star point connecting conductors in a welding mode, or all or part of hairpin conductors, which are located at the connecting ends of the multiple phases of phase windings, which are used for connecting star points, are connected by adopting an integrally preformed structure.

An electrical machine comprising a stator as described above.

In conclusion, the phase winding, the stator and the motor have the advantages of reasonable structural design, few types of hair clips, low cost, contribution to reducing the assembly difficulty, improving the assembly efficiency and the assembly quality and the like.

Drawings

Fig. 1 is a schematic structural view of a stator in embodiment 1.

Fig. 2 is a schematic diagram of a phase winding in embodiment 1.

Fig. 3 is an enlarged schematic view of the circle in fig. 2.

Fig. 4 is a schematic diagram of a branch circuit in fig. 2.

Fig. 5 is an enlarged schematic view of the circle in fig. 4.

Fig. 6 and 7 are schematic views of the structure of one coil loop.

Fig. 8 is a schematic structural diagram of a first type of offset U-shaped conductor.

Fig. 9 is a schematic structural diagram of a second type of U-shaped offset conductor.

Fig. 10 is a schematic structural view of a single coil.

Fig. 11 is a schematic structural diagram of one hairpin conductor in fig. 6 correspondingly configured as a single-pin conductor.

Fig. 12 is a schematic diagram of a structure in which one hairpin conductor in fig. 7 is correspondingly arranged as a single-pin conductor.

Fig. 13 is a conductor layer layout view (connection side) of the unit coils in the stator core slots in example 1.

Fig. 14 is a conductor layer layout diagram (insertion side) of the unit coils in the stator core slots in example 1.

Fig. 15 is a schematic structural view of an O-shaped conductor.

Fig. 16 is a schematic structural view of a single-body coil in example 2.

Fig. 17 is a conductor layer layout diagram (connection side) of the unit coils in the stator core slots in example 2.

Fig. 18 is a conductor layer layout diagram (insertion side) of the unit coils in the stator core slots in example 2.

Fig. 19 is a schematic view showing the structure of a welding power supply lead conductor 6 of one phase winding in embodiment 2.

Fig. 20 is an enlarged schematic view of the circle in fig. 19.

Fig. 21 is a schematic diagram of the structure of the phase winding of fig. 19.

Fig. 22 is a schematic structural view of a stator in embodiment 2.

Fig. 23 is a schematic structural view of a coil loop corresponding to fig. 6 in embodiment 3.

Fig. 24 is a schematic structural view of a coil loop corresponding to fig. 7 in embodiment 3.

Fig. 25 is a schematic view of the structure of one phase winding in embodiment 3.

Fig. 26 is an enlarged schematic view of the circle in fig. 25.

Fig. 27 is a schematic structural view of a stator in embodiment 3.

Fig. 28 and 29 are schematic structural views of tributaries located in two adjacent slots in embodiment 3.

Fig. 30 is a schematic view of the combined structure of fig. 28 and 29.

Fig. 31 to 34 are schematic structural views of branches in embodiment 4.

Fig. 35 is a schematic view of the structure of one phase winding in embodiment 4.

Fig. 36 is an enlarged view of the circle in fig. 35.

Fig. 37 is a schematic structural view of a stator according to embodiment 4.

Fig. 38 is a schematic view of a stator structure of embodiment 5.

Fig. 39 is a schematic diagram of the structure of the three-phase winding of fig. 38.

Fig. 40 is a schematic diagram of the structure of one of the phase windings of fig. 38.

FIG. 41 is a schematic view showing the structure of one arm in embodiment 5.

Fig. 42 is a schematic diagram of the structure of the two single-pin conductors of fig. 41.

Fig. 43 is a schematic structural view of a stator of embodiment 6.

Fig. 44 is a schematic diagram of the structure of one phase winding in embodiment 6.

Fig. 45 is a schematic diagram of the structure of the large span hairpin conductor of fig. 44.

Fig. 46 is a schematic structural view of the star point connection conductor and the corresponding single-pin conductor in fig. 43, which are integrally formed.

Detailed Description

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

Example 1: 4 lines and two branches, each pole has a slot number Q of 2

As shown in fig. 1 to 14, a motor includes a stator, the stator includes a stator core 8 and three phase windings installed on the stator core 8, one end of each branch on all the phase windings is connected to each other through a star point connecting conductor 7, and the other end of two parallel branches on each phase winding is connected in parallel through a power supply lead-out conductor 6, as shown in fig. 2 and 3.

The stator core 8 includes a main body which is cylindrical as a whole, a plurality of stator core slots which are opened inwards along the radial direction are arranged on the inner ring of the stator core 8 along the circumferential direction, the upper end of each stator core slot is an insertion side (or a crown side), and the lower end of each stator core slot is a connection side.

In this embodiment, the number Q of slots per phase per pole is 2, and each branch includes 2 coil loops 5 located in 2 circumferentially consecutive and adjacent slots of the stator in the assembled state, and the coil loops are connected in series, as shown in fig. 4 and 5.

In this embodiment, the number P of pole pairs of the motor is 4, and the coil ring 5 is formed by sequentially connecting 4 single coils 4 in the circumferential direction of the stator core 8, as shown in fig. 6 and 7.

In this embodiment, the single coil 4 includes a first type of partial U-shaped conductor 1 and a second type of partial U-shaped conductor 2, as shown in fig. 8 and 9, each of the first type of partial U-shaped conductor 1 and the second type of partial U-shaped conductor 2 includes a hairpin main body bent in a U shape as a whole, the hairpin main body includes two leg portions i arranged in parallel with each other and a head portion ii connected to one end of each of the two leg portions i, the other end of each of the two leg portions i is provided with a support leg iii, and the two support legs iii on the same hairpin main body are bent toward the same side in the width direction of the hairpin main body; the first type of partial U-shaped conductor 1 and the second type of partial U-shaped conductor 2 are arranged side by side in the thickness direction of the hairpin body, and the deflection bending directions of the legs iii of the first type of partial U-shaped conductor 1 and the legs iii of the second type of partial U-shaped conductor 2 are opposite, so that the legs iii deflected and bent outwards in the first type of partial U-shaped conductor 1 and the legs iii deflected and bent outwards in the second type of partial U-shaped conductor 2 are deviated from each other, and the legs iii deflected and bent towards the middle part in the first type of partial U-shaped conductor 1 and the legs iii deflected and bent towards the middle part in the second type of partial U-shaped conductor 2 are connected to form the single coil 4, as shown in fig. 10; the two leg parts of the first type of inclined U-shaped conductor and the second type of inclined U-shaped conductor are arranged in a staggered mode in the thickness direction of the hairpin main body, the second type of inclined U-shaped conductor is located between the two leg parts of the first type of inclined U-shaped conductor in the thickness direction of the first type of inclined U-shaped conductor, and the head part of the second type of inclined U-shaped conductor is wrapped in the head part of the first type of inclined U-shaped conductor.

In this embodiment, as shown in fig. 6, the first type of biased U-shaped conductors 1-a1 on one single coil 4 of one branch are the single-pin conductors 1-a2 and 1-a3 correspondingly disposed at the positions of the leg portions, as shown in fig. 11, one end of each of the single-pin conductors 1-a2 and 1-a3 is a leg matched with the single coil, and the other end is a connection end for connecting a star point or a power supply.

As shown in fig. 7, the first type of biased U-shaped conductors 1-b1 on one single coil 4 of the other branch are the single-pin conductors 1-b2 and 1-b3 correspondingly disposed at the positions of the leg portions, as shown in fig. 12, one end of each of the single-pin conductors 1-b2 and 1-b3 is a leg matched with the single coil, and the other end is a connection end for connecting a star point or a power supply.

In this embodiment, as shown in fig. 4 and 5, on the same branch, in the direction of the front view insertion side, the pitch of the first type of U-shaped conductors 1-c on the last single coil of the previous coil loop in the clockwise direction is Y +1, that is, the leg portions thereof are outwardly offset by a slot in the clockwise direction, so that the legs of the first type of U-shaped conductors 1 with the pitch of Y +1 and the legs (the initial legs of the next coil loop) connected in series with the legs on the next coil loop are located in the same slot, which facilitates direct soldering connection.

And the pitch of the first-class eccentric U-shaped conductor (replaced by the single-pin conductor 1-b2 and the single-pin conductor 1-b 3) on the last single coil of the last coil loop in the clockwise direction is Y-1, namely, the leg part of the first-class eccentric U-shaped conductor is inwards deviated into a slot position in the clockwise direction and just occupies the slot position which is left after the first-class eccentric U-shaped conductor on the last single coil of the previous coil loop is outwards deviated out of the slot position, so that the position exchange is realized, and the pitches of all other first-class eccentric U-shaped conductors 1 and all second-class eccentric U-shaped conductors 2 are Y.

As shown in fig. 2 and fig. 3, on two branches connected in parallel with each other on the same phase winding, the single-pin conductor 1-b2 for connecting the power supply on the single coil 4 of one branch is welded with the single-pin conductor 1-a3 for connecting the power supply on the single coil 4 of the other branch, and is welded with the power supply lead-out conductor 6. Meanwhile, the two single-pin conductors on the same single coil are combined into a lead conductor group, and the single coils where the lead conductor groups on the two branches which are connected in parallel are adjacent in the circumferential direction of the phase winding. Because two lead wire conductor groups are in two adjacent monomer coil position departments of circumference for the distance between the power connection end in two lead wire conductor groups is nearer with between the star point link, thereby has shortened the cross-over connection conductor that is used for connecting power connection end and connects the star point link, reduces the use amount of useless copper.

In this embodiment, the first-type offset U-shaped conductors 1-a1 corresponding to the single-leg conductors 1-a2 and 1-a3, and the first-type offset U-shaped conductors 1-b1 corresponding to the single-leg conductors 1-b2 and 1-b3 are all first-type offset U-shaped conductors with a pitch of Y-1. Meanwhile, in the specific implementation, in order to enable the single-pin conductors 1-b2 and 1-a3 to be more conveniently connected with the power lead-out conductor 6 in a welding mode, the connecting ends of the first type of bias U-shaped conductors 1-a1 and 1-b1 are extended to be adjacent to each other.

As shown in fig. 8 and 9, the first type of the off-U-shaped conductor 1 and the second type of the off-U-shaped conductor 2 are each formed by bending a copper wire having a rectangular cross section. The head II of the first type of inclined U-shaped conductor 1 and the head II of the second type of inclined U-shaped conductor 2 are V-shaped with top ends, two sides of the head II and two leg parts I are arranged in a staggered mode from front to back along the radial direction of a coil ring from the top ends of the V-shaped conductors, namely from front to back along the thickness direction of the hairpin main bodies, the second type of inclined U-shaped conductor 2 is located between the two leg parts I of the first type of inclined U-shaped conductor 1 in the thickness direction of the first type of inclined U-shaped conductor 1, as shown in figure 10, and the head II of the second type of inclined U-shaped conductor 2 is wrapped in the head II of the first type of inclined U-shaped conductor 1.

In specific implementation, the head part II can be arranged into an arc shape.

Fig. 13 and 14 show conductor layer arrangements of the unit coils 4 on the connection side and the insertion side, respectively. For convenience of description, the leg portion i located at the same slot position is divided into a first layer conductor L1, a second layer conductor L2, a third layer conductor L3 and a fourth layer conductor L4 from outside to inside in the radial direction; the two leg portions i of the first type of the inclined U-shaped conductor 1 are respectively a first layer conductor L1 and a fourth layer conductor L4 of the slot where the first type of the inclined U-shaped conductor 1 is located, and the two leg portions i of the second type of the inclined U-shaped conductor 2 are respectively a second layer conductor L2 and a third layer conductor L4 of the slot where the second type of the inclined U-shaped conductor is located.

In a specific use process, the following four arrangements can be adopted in the radial direction of the single coil 4:

the first method comprises the following steps: the leg iii of the first type of the partial U-shaped conductor 1, which is bent and deflected outward, is set as a first layer conductor L1 and extends clockwise along the circumference, the leg iii of the second type of the partial U-shaped conductor 2, which is bent and deflected outward, is set as a second layer conductor L2 and extends counterclockwise along the circumference, the leg iii of the second type of the partial U-shaped conductor 2, which is bent and deflected inward, is set as a third layer conductor L3, and the leg iii of the first type of the partial U-shaped conductor 1, which is bent and deflected inward, is set as a fourth layer conductor L4 and is connected to the third layer conductor, and welding is generally adopted here.

And the second method comprises the following steps: the leg iii of the first type of the partial U-shaped conductor 1, which is deflected and bent outward, is set as a first layer conductor L1 and extends in the counterclockwise direction of the circumference, the leg iii of the second type of the partial U-shaped conductor 2, which is deflected and bent outward, is set as a second layer conductor L2 and extends in the clockwise direction of the circumference, the leg iii of the second type of the partial U-shaped conductor 2, which is deflected and bent inward, is set as a third layer conductor L3, and the leg iii of the first type of the partial U-shaped conductor 1, which is deflected and bent inward, is set as a fourth layer conductor L4 and is connected with the third layer conductor.

And the third is that: the leg iii of the first type of the partial U-shaped conductor 1, which is deflected and bent outward, is set as a fourth layer conductor L4 and extends clockwise along the circumference, the leg iii of the second type of the partial U-shaped conductor 2, which is deflected and bent outward, is set as a third layer conductor L3 and extends counterclockwise along the circumference, the leg iii of the second type of the partial U-shaped conductor 2, which is deflected and bent inward, is set as a second layer conductor L2, and the leg iii of the first type of the partial U-shaped conductor 1, which is deflected and bent inward, is set as a first layer conductor L1 and is connected with the second layer conductor.

And fourthly: the leg iii of the first type of the partial U-shaped conductor 1, which is deflected and bent outward, is set as a fourth layer conductor L4 and extends clockwise along the circumference, the leg iii of the second type of the partial U-shaped conductor 2, which is deflected and bent outward, is set as a third layer conductor L3 and extends counterclockwise along the circumference, the leg iii of the second type of the partial U-shaped conductor 2, which is deflected and bent inward, is set as a second layer conductor L2, and the leg iii of the first type of the partial U-shaped conductor 1, which is deflected and bent inward, is set as a first layer conductor L1 and is connected with the second layer conductor.

The clockwise direction and the anticlockwise direction are judged by taking the connecting side of the stator core 8 as the front side, and point inwards between two leg parts I of the U-shaped conductor and point outwards outside the two leg parts of the U-shaped conductor.

In order to facilitate wiring and connection, the end parts of the support legs III of the first type of inclined U-shaped conductor 1 and the second type of inclined U-shaped conductor 2 are respectively provided with a connecting leg IV which is arranged in parallel to the support leg I, and the two connecting legs IV which are connected are arranged adjacently in the radial direction.

The stator in the present embodiment adopts the first mode, and in the present embodiment, the number of pole pairs P of the stator is 4, the number of slots Q per phase per pole is 2, the number of slots Z of the stator core is 48 slots, the number of conductors a per slot is 4, the pitch Y is 6, and the number of parallel branches R is 2.

In this embodiment, the stator is a three-phase stator winding, so that 3 of the two branch phase windings are arranged in the circumferential direction of the stator to form a three-phase stator winding, as shown in fig. 1 to 3.

Example 2: 8 lines and two branches, each pole has a slot number Q of 2

Based on example 1, the main difference from example 1 is that:

as shown in fig. 15 to 22, each of the single coils 4 further includes 2O-shaped conductors 3, as shown in fig. 15, each of the O-shaped conductors 3 includes a hairpin body bent in a U shape as a whole, the hairpin body includes two leg portions i arranged in parallel with each other and a head portion ii connected to one end of each of the two leg portions i, the other end of each of the two leg portions i is provided with a leg iii, and the two leg portions iii are deflected toward the middle in the width direction of the hairpin body and are arranged at an offset interval in the thickness direction of the hairpin body.

The two leg parts I of the first type of inclined U-shaped conductor 1 and the second type of inclined U-shaped conductor 2 are arranged in a staggered mode in the thickness direction of the hairpin main body, the second type of inclined U-shaped conductor 2 is located between the two leg parts I of the first type of inclined U-shaped conductor 1 in the thickness direction of the first type of inclined U-shaped conductor 1, and the head part II of the second type of inclined U-shaped conductor 2 is wrapped in the head part II of the first type of inclined U-shaped conductor 1.

The O-shaped conductor 3 is located between the two leg portions i of the first type of the partial U-shaped conductor 1 in the thickness direction of the first type of the partial U-shaped conductor 1, and is stacked with the second type of the partial U-shaped conductor 2 to form two leg portions iii of the O-shaped conductor 3, which are respectively connected to the other leg portions iii adjacent to each other in the thickness direction, and the single coil 4 in which the leg portion iii bent outward in the first type of the partial U-shaped conductor 1 and the leg portion iii bent outward in the second type of the partial U-shaped conductor 2 are deviated from each other is shown in fig. 16.

In addition, similar to embodiment 1, the single coil 4 added with the O-shaped conductor 3 has four basic arrangements according to the extending direction of the leg iii of the outward deflection bending of the first type of the deflected U-shaped conductor 1 and the position in the slot, specifically as follows:

the first method comprises the following steps: a leg part I where a leg part III of the first type of U-shaped conductors 1 which are deflected and bent outwards is arranged is set as a first layer of conductors and extends out clockwise along the circumference.

And the second method comprises the following steps: a leg part I where a leg part III of the first type of U-shaped conductors 1 which are deflected and bent outwards is arranged is set as a first layer of conductors and extends out along the anticlockwise direction of the circumference.

And the third is that: a leg part I where a leg part III of the first type of U-shaped conductors 1 which are deflected and bent outwards is set as an A-layer conductor and extends out clockwise along the circumference.

And fourthly: a leg part I where a leg part III of the first type of U-shaped conductors 1 which are deflected and bent outwards is arranged is set as an A-layer conductor and extends out along the anticlockwise direction of the circumference.

The second type of U-shaped conductors 2 and the O-shaped conductors 3 laminated in the first type of U-shaped conductors 1 have different arrangement orders according to the arrangement combination thereofWherein n is the sum of the number of the second type of U-shaped conductors 2 and O-shaped conductors 3, so that the single coil 4 for increasing the O-shaped conductors 3 hasA lamination method.

However, the legs iii bent and deflected outward in the first type of partial U-shaped conductor 1 and the legs iii bent and deflected outward in the second type of partial U-shaped conductor 2 are disposed as two adjacent layers of conductors, so that the legs iii on the two connected single coils 4 can be adjacent without using a jumper conductor, and therefore, in a specific implementation, the following structure is generally adopted:

for convenience of description, the leg portion i located at the same slot position is divided into a first-layer conductor and a second-layer conductor … … a-layer conductor from outside to inside in the radial direction, wherein a is an even number greater than 4; when the leg part I where the outwardly deflected and bent leg III of the first type of U-shaped conductor 1 is located and the leg part I where the inwardly deflected and bent leg III is located are the first layer conductor and the first layer conductor of the slot position where the first type of U-shaped conductor 1 is located respectively, the leg part I where the outwardly deflected and bent leg III of the second type of U-shaped conductor 2 is located and the leg part I where the inwardly deflected and bent leg III is located are the second layer conductor and the third layer conductor of the slot position where the second type of U-shaped conductor 2 is located respectively, the leg part I of the O-shaped conductor 3 is the 2n layer conductor and the 2n +1 layer conductor of the slot position where the second type of U-shaped conductor is located respectively, and 2 < n < A/2-1. When the leg I where the outwardly deflected and bent leg III of the first type of U-shaped conductor 1 is located and the leg I where the inwardly deflected and bent leg III of the second type of U-shaped conductor 2 is located are the A-layer conductor and the first-layer conductor of the respective slot positions, the leg I where the outwardly deflected and bent leg III of the second type of U-shaped conductor 2 is located and the leg I where the inwardly deflected and bent leg III of the first type of U-shaped conductor 1 is located are the A-1 layer conductor and the A-2 layer conductor of the respective slot positions, the leg I of the O-shaped conductor 3 is the A-2n layer conductor and the A-2n +1 layer conductor of the respective slot positions, and 2 ≦ n ≦ A/2-1.

In this embodiment, the single coil 4 is formed by arranging a first type of inclined U-shaped conductor 1, a second type of inclined U-shaped conductor 2 and two O-shaped conductors 3 on the basis of a first basic arrangement mode, specifically, a leg iii of the first type of inclined U-shaped conductor 1, which is deflected outwards and bent, is a first layer of conductor L1 and extends clockwise; the outward deflection bent supporting leg III of the second type of U-shaped inclined conductor 2 is a second layer conductor L2 and extends anticlockwise, and the inward deflection bent supporting leg III of the second type of U-shaped inclined conductor 2 is a third layer conductor L3; the front leg III of the first O-shaped conductor 3 next to the second type of U-shaped conductors 2 is a fourth-layer conductor L4 and is connected with the leg III of the third-layer conductor, and the rear leg III thereof is a fifth-layer conductor L5; the front leg III of the second O-shaped conductor 3 next to the second type of U-shaped conductors 2 is a sixth-layer conductor L6 and is connected with the leg III of the fifth-layer conductor, and the rear leg III thereof is a seventh-layer conductor L7; the leg III of the first type of U-shaped deflection conductor 1 which is deflected inwards is the eighth layer conductor L8 and is connected with the leg III of the seventh layer conductor. Wherein fig. 17 and 18 show conductor layer arrangements of the unit coil 4 on the front side (connection side) and the back side (insertion side), respectively.

In this embodiment, the number of pole pairs P is 4, the number of slots Q per phase per pole is 2, the number of slots Z of the stator core is 48, the number of conductors a per slot is 4, the pitch Y is 6, and the number of parallel branches R is 2.

As shown in fig. 19 to 21, another difference of this embodiment from embodiment 1 is that, in two branches connected in parallel with each other on the same phase winding, the connection end of the one-pin conductor 1-b2 for connecting the power supply on the single coil 4 of one branch and the connection end of the one-pin conductor 1-a3 for connecting the power supply on the single coil 4 of the other branch are directly connected to form an integrally formed large-span hairpin conductor, and then are connected to the power supply lead-out conductor 6 by welding.

In this embodiment, the three-phase stator winding is adopted, so that 3 two branch phase windings are arranged in the circumferential direction of the stator to form a three-phase stator winding, and finally, a star point connecting conductor 7 for connecting the 3 phase windings is arranged at the terminal of each phase winding to realize star point connection of the three-phase windings, as shown in fig. 22.

Example 3: 4 lines and one branch, each pole and each phase of the slot number Q is 2

In this embodiment, the number P of pole pairs of the stator is 4, the number Q of slots per phase per pole is 2, the number Z of slots of the stator core is 48 slots, the number a of conductors per slot is 4, the pitch Y is 6, and the number R of parallel branches is 1.

The phase winding comprises a branch circuit, the branch circuit comprises two coil ring groups connected in series, each coil ring group is formed by connecting Q coil rings which are positioned on Q circumferentially continuous adjacent slots of the stator in an assembly state, and Q is the number of each phase slot of each pole; in this embodiment, since Q is 2, that is, each coil ring group includes 2 coil rings 5 located in 2 slots continuously adjacent to each other in the circumferential direction of the stator in the assembled state, and the number P of pole pairs in this embodiment and embodiment 1 is 4, the coil rings 5 are formed by sequentially connecting 4 single coils 4 in the circumferential direction of the stator core 8. That is, the connection structure of each coil loop group in the present embodiment is identical to the connection structure of each branch in embodiment 1, as shown in fig. 4 to 7.

In this embodiment, as shown in fig. 4 and 5, in each coil loop group, in the direction of the front view insertion side, the pitch of the first type of offset U-shaped conductor 1-c on the last single coil of the previous coil loop in the clockwise direction is Y +1, that is, the leg portion thereof is offset outward by a slot in the clockwise direction, so that the leg of the first type of offset U-shaped conductor 1 with the pitch of Y +1 and the leg (the initial leg of the next coil loop) connected in series with the leg on the next coil loop are located in the same slot, which facilitates direct soldering connection. And the pitch of the first-class eccentric U-shaped conductor (replaced by the single-pin conductor 1-b2 and the single-pin conductor 1-b 3) on the last single coil of the last coil loop in the clockwise direction is Y-1, namely, the leg part of the first-class eccentric U-shaped conductor is inwards deviated into a slot position in the clockwise direction and just occupies the slot position which is left after the first-class eccentric U-shaped conductor on the last single coil of the previous coil loop is outwards deviated out of the slot position, so that the position exchange is realized, and the pitches of all other first-class eccentric U-shaped conductors 1 and all second-class eccentric U-shaped conductors 2 are Y.

In this embodiment, as shown in fig. 6, the first-type biased U-shaped conductors 1-a1 on one single coil 4 of one branch are the single-leg conductors 1-a2 and the single-leg conductors 1-a3 correspondingly disposed at the positions of the leg portions, as shown in fig. 23, one end of each of the single-leg conductors 1-a2 and the single-leg conductors 1-a3 is a leg matched with the single coil, and the other end is a connection end for connecting another coil loop group or star point or a power supply.

As shown in fig. 7, the first type of biased U-shaped conductors 1-b1 on one single coil 4 of another branch are the single-pin conductors 1-b2 and 1-b3 correspondingly disposed at the positions of the leg portions, as shown in fig. 24, one end of the single-pin conductors 1-b2 and 1-b3 is the leg matched with the single coil, and the other end is the connection end for connecting another coil loop group or star point or power supply.

As shown in fig. 25 and 26, in two coil loop groups connected in series with each other on the same branch, the single-leg conductor 1-b2 for series connection on the single coil 4 of one coil loop group is directly connected with the single-leg conductor 1-a3 for series connection on the single coil 4 of the other branch to form an integrally formed large-span hairpin conductor.

In the two coil rings which are connected in series, the output end supporting foot of the previous coil ring and the input end supporting foot of the next coil ring in the current direction are arranged side by side in the radial direction of the phase winding, and the two coil rings can be directly welded and connected in series without adopting a cross-over conductor. Because the inside connection stabilizer blade of every coil loop all is on the adjacent position of same trench, through above-mentioned structure, just so that the stabilizer blade of whole phase winding all need not the cross-over connection conductor, just can weld and link to each other, greatly reduced the whole assembly degree of difficulty and the welding degree of difficulty of motor, be favorable to improving assembly quality and assembly efficiency.

In this embodiment, the three-phase stator winding is adopted, so 3 phase windings are arranged in the circumferential direction of the stator to form a three-phase stator winding, and finally, a star point connecting conductor 7 for connecting the 3 phase windings is arranged at the terminal of each phase winding to realize star point connection of the three-phase windings, as shown in fig. 27.

Example 4: 4 lines and 4 branches, each pole and each phase of the slots Q is 2

In this embodiment, the number P of pole pairs of the stator is 4, the number Q of slots per phase per pole is 2, the number Z of slots of the stator core is 48 slots, the number a of conductors per slot is 4, the pitch Y is 6, and the number R of parallel branches is 4.

The difference from embodiment 1 is that the phase winding includes four branches arranged in parallel, each branch includes a coil loop, the coil loop is formed by sequentially connecting P single coils, P is the number of pole pairs of the phase winding and is an even number, and in this embodiment, P is 4; each coil ring is provided with a pair of first-class inclined U-shaped conductors/second-class inclined U-shaped conductors with the pitch of Y +1 and first-class inclined U-shaped conductors/second-class inclined U-shaped conductors with the pitch of Y-1, which are arranged at diametrically opposite positions, and the pitches of all other conductors are Y; the first type of U-shaped conductors/the second type of U-shaped conductors with the pitch of Y +1 on one branch and the first type of U-shaped conductors/the second type of U-shaped conductors with the pitch of Y-1 on the other branch on the circumferentially adjacent slot are positioned in the circumferentially adjacent slot.

In the present embodiment, as shown in fig. 28 to 30, the coil loop shown by the solid line in fig. 30 is the coil loop in fig. 28, the coil loop shown by the broken line is the coil loop in fig. 29, and the viewing angles in fig. 28, 29, and 30 completely coincide with each other.

It can be seen from the circled portions at a-1 and a-2 of fig. 28 that the two are located at two diametrically opposite positions, wherein a first type of U-shaped conductor 1 with a pitch of Y-1 is arranged at the circled portion of a-1, so that the leg portion thereof is inwardly biased into a slot, i.e., the leg portion i where the leg iii bent and deflected outwardly on the first type of U-shaped conductor 1 with the pitch of Y-1 is located is inwardly biased into a slot relative to the second type of U-shaped conductor 2 in the single coil 4 where the leg iii is located. And a first type of U-shaped conductors 1 with the pitch of Y +1 are arranged at the circle of A-2, so that the leg parts of the first type of U-shaped conductors 1 deviate outwards to form a slot position, namely, the leg parts I where the legs III which deflect and bend outwards on the first type of U-shaped conductors 1 with the pitch of Y +1 are located deviate outwards to form a slot position relative to the second type of U-shaped conductors 2 in the single coils 4 where the legs III are located.

Similarly, the circle parts at B-1 and B-2 in FIG. 29 can be seen that they are located at two diametrically opposite positions, where B-1 corresponds to A-1 in FIG. 4, and the single coils located at both positions are located in circumferentially adjacent slots; and the position of B-2 in the figure 4 of B-2 corresponds to that of B-2, and the single coils of the two are also positioned in the circumferentially adjacent slot positions. A first type of U-shaped conductors 1 with the pitch of Y +1 are arranged at the circle of B-1, so that the leg parts of the first type of U-shaped conductors 1 deviate outwards to form a slot position, namely, the leg parts I where the legs III which deflect and bend outwards on the first type of U-shaped conductors 1 with the pitch of Y +1 deviate outwards to form a slot position relative to the second type of U-shaped conductors 2 in the single coils 4 where the legs III are located. And a first type of U-shaped conductors 1 with the pitch of Y-1 are arranged at the circle of the B-2, so that the leg parts of the first type of U-shaped conductors 1 are inwards deflected into a slot position, namely, the leg parts I where the legs III which are deflected and bent outwards on the first type of U-shaped conductors 1 with the pitch of Y-1 are inwards deflected into a slot position relative to the second type of U-shaped conductors 2 in the single coils 4 where the legs III are located.

By adopting the structure, a pair of the first-class partial U-shaped conductors 1 with the pitch of Y +1 and the first-class partial U-shaped conductors 1 with the pitch of Y-1 are arranged in the radial direction of the two branches, and compared with the branch formed by the first-class partial U-shaped conductors 1 and the second-class partial U-shaped conductors 2 with all pitches consistent, half of the single coils 4 on the branches can be kept at the original positions, and the other half of the single coils 4 can be moved by one slot pitch clockwise or anticlockwise. And the single coils 4 on the two branches which are positioned on the same side and on the adjacent slot positions respectively move a slot distance towards the opposite direction, so that the position relations of the two single coils 4 on the adjacent slot positions on the side are mutually exchanged, and further the position relations of the single coils 4 on the two branches are arranged in an axial symmetry manner, and no matter in a clockwise direction or an anticlockwise direction, half of the single coils 4 of the adjacent slot positions on the two branches have a mechanical angle difference of +360/Z degrees, and the other half has a mechanical angle difference of-360/Z degrees, so that the potential difference generated between the two branches can be avoided to form a circulation. Simultaneously, the stabilizer blade III of phase connection is located same groove in this kind of structure, need not to adopt the cross-over connection conductor, just can directly link to each other the welding of the two, reduces the use amount of useless copper, makes the connection of conductor simpler, the manufacturing of being convenient for.

Furthermore, two single-pin conductors on the same single coil are combined into a lead conductor group, two branches positioned in circumferentially adjacent slots of the stator in an assembly state are combined into a group, and the single coils on the two branches in the same group are positioned in circumferentially adjacent slots on the phase winding; the single coils of the lead conductor groups on the two branches in the same group are adjacent to the single coils of the lead conductor groups on the two branches in the other group in the circumferential direction of the phase winding.

Therefore, the distances between the power supply connecting ends in the four lead conductor groups and between the star point connecting ends can be closer, so that the jumper conductor for connecting the power supply connecting ends and the star point connecting ends is shortened, and the using amount of useless copper is reduced.

In this embodiment, the first type of inclined U-shaped conductor 1 on one single coil 4 of each branch is two single-pin conductors correspondingly disposed at the positions of the leg portions, as shown in fig. 31 to 34, wherein one end of each single-pin conductor is a leg matched with the single coil, and the other end of each single-pin conductor is a connection end for connecting a star point or a power supply.

As shown in fig. 35 and 36, in the four branches connected in parallel, the single-pin conductor for connecting the power supply and the single-pin conductor for connecting the power supply are welded to each other, and are welded to the power supply lead-out conductor 6. Meanwhile, two single-pin conductors on the same single coil are combined into a lead conductor group, two branches positioned in circumferentially adjacent slots of the stator in an assembly state are combined into a group, and the single coil on which the lead conductor groups on the two branches in the same group are positioned is positioned in circumferentially adjacent two slots on the phase winding; the single coils of the lead conductor groups on the two branches in the same group are adjacent to the single coils of the lead conductor groups on the two branches in the other group in the circumferential direction of the phase winding.

In this embodiment, the three-phase stator winding is adopted, so 3 phase windings are arranged in the circumferential direction of the stator to form a three-phase stator winding, and as shown in fig. 37, a star point connecting conductor 7 for connecting the 3 phase windings is finally arranged at the terminal of each phase winding to realize star point connection of the three-phase windings.

Example 5: 6 lines and two branches, each pole has a slot number Q equal to 3

As shown in fig. 38 to 42, a motor includes a stator including a stator core and three phase windings installed on the stator core, one end of each branch of all the phase windings is connected to each other through a star point connection conductor, and the other ends of two parallel branches of each phase winding are connected in parallel through a power supply lead-out conductor, as shown in fig. 38 to 40.

Example 5 is similar to example 2 in that two phase windings are used, and the single coils 4 each include an O-shaped conductor 3 in a ring shape, and the main difference from example 2 is that:

as shown in fig. 41, each branch includes 3 coil loops located in 3 circumferentially consecutive adjacent slots of the stator in an assembled state, in the same coil loop group, two coil loops located in adjacent slots are connected to each other, and a pitch of the hairpin conductor located on a last single coil of a previous coil loop in a clockwise or counterclockwise direction is Y +1, so that a leg located at an end on the hairpin conductor with the pitch of Y +1 and a leg connected thereto on a subsequent coil loop are arranged side by side in a radial direction of the phase winding; the pitch of the hairpin conductor on the last individual coil of the last coil loop in the clockwise or counterclockwise direction is Y-2, and the pitch of all other hairpin conductors is Y.

In this embodiment, as shown in fig. 42, the O-shaped conductor on one single coil in each branch is two single-pin conductors correspondingly disposed at the positions of the leg portions.

Example 6: 4 lines and two branches, each pole has a slot number Q equal to 1

As shown in fig. 43 to 46, a motor includes a stator, where the stator includes a stator core and three phase windings installed on the stator core, one end of each branch of all the phase windings is connected to each other through a star point connecting conductor, and the other ends of two parallel branches of each phase winding are connected in parallel through a power supply lead-out conductor, as shown in fig. 43.

As shown in fig. 44, in the same phase winding, the connection ends of the two single-pin conductors for connecting the power supply in the two coil loop groups connected in parallel are integrally bent large-span hairpin conductors correspondingly disposed at the positions of the leg portions of the two single-pin conductors, as shown in fig. 45.

In practical implementation, the star point connecting conductor in fig. 43 and the single-pin conductor connected thereto are an integral hairpin structure, as shown in fig. 46.

The above description is only exemplary of the present invention and should not be taken as limiting, and any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The phase winding is characterized by comprising at least one branch, each branch is formed by connecting at least one coil ring, each coil ring comprises P single coils which are sequentially connected, and P is the number of pole pairs;

2. The phase winding of claim 1, wherein the hairpin conductor comprises a first type of offset U-shaped conductor and a second type of offset U-shaped conductor having legs deflected and bent toward the same side in the width direction of the hairpin body, the first type of offset U-shaped conductor and the second type of offset U-shaped conductor are arranged side by side in the thickness direction of the hairpin body, and the legs of the first type of offset U-shaped conductor and the legs of the second type of offset U-shaped conductor are deflected and bent in opposite directions, so that the legs deflected and bent outward in the first type of offset U-shaped conductor and the legs deflected and bent outward in the second type of offset U-shaped conductor are away from each other, and the legs deflected and bent toward the middle portion in the first type of offset U-shaped conductor and the legs deflected and bent toward the middle portion in the second type of offset U-shaped conductor are connected to form the single coil.

3. The phase winding of claim 2, wherein the hairpin conductor further comprises an O-shaped conductor having an overall annular shape, the two legs of the O-shaped conductor being bent while being deflected toward a middle portion in a width direction of the hairpin body and being arranged at a shifted interval in a thickness direction of the hairpin body; the O-shaped conductor and the second type of inclined U-shaped conductor are arranged in a stacked mode in the thickness direction of the first type of inclined U-shaped conductor, two support legs forming the O-shaped conductor are respectively connected with other adjacent support legs in the thickness direction, and the support legs deflected and bent outwards in the first type of inclined U-shaped conductor and the support legs deflected and bent outwards in the second type of inclined U-shaped conductor are mutually deviated.

4. The phase winding according to claims 1 to 3, wherein the phase winding comprises one branch or two branches arranged in parallel, and in the same phase winding, Q coil loops which are positioned on Q circumferentially continuous adjacent slots of the stator in an assembled state are sequentially connected in series to form a coil loop group, wherein Q is the number of slots of each phase of each pole and is an integer; two in the same phase winding each have a hairpin conductor for corresponding two single-pin conductors that set up on its shank position in the monomer coil of interconnect in the coil loop group, the one end of single-pin conductor is the stabilizer blade, and this stabilizer blade is unanimous with the stabilizer blade of the hairpin conductor on this corresponding position, and the other end is the link.

5. The phase winding of claim 4, wherein two single-leg conductors on the same single coil are combined into a lead conductor group, and the single coils on which the lead conductor groups on the two coil ring groups in the same phase winding are arranged are adjacent to each other in the circumferential direction of the phase winding.

6. The phase winding of claim 5, wherein two of said coil loop groups in the same phase winding are connected in series to form one branch or in parallel to form two branches; the connecting ends of the two single-pin conductors which are used for being connected in series in the two coil ring groups which are connected in series are connected in a welding way, or the two single-pin conductors which are used for being connected in series in the two coil ring groups which are connected in series are integrally bent and formed large-span hairpin conductors which are correspondingly arranged at the positions of the leg parts of the two single-pin conductors; the connecting ends of the two single-pin conductors used for connecting the power supply in the two coil ring groups which are connected in parallel are connected in a welding mode, or the two single-pin conductors used for connecting the power supply in the two coil ring groups which are connected in parallel are integrally bent and formed large-span hairpin conductors which are correspondingly arranged at the positions of the leg parts of the two coil ring groups.

7. The phase winding of claim 4, wherein each of said coil loop groups includes Q coil loops positioned in assembled condition over Q circumferentially consecutive adjacent slots of the stator, Q being the number of slots per pole per phase and being an integer greater than 1; in the same coil ring group, two coil rings positioned on adjacent slot positions are mutually connected, and the pitch of the hairpin conductor positioned on the last single coil of the previous coil ring in the clockwise or anticlockwise direction is Y +1, so that a support leg positioned at the end part of the hairpin conductor with the pitch of Y +1 and a support leg connected with the hairpin conductor on the next coil ring are arranged side by side in the radial direction of the phase winding; the pitch of the hairpin conductors on the last individual coil of the last coil loop in the clockwise or counterclockwise direction is Y-Q +1, and the pitch of all other hairpin conductors is Y.

8. The phase winding according to claim 1 to 3, characterized in that the phase winding comprises four branches arranged in parallel, each branch comprises a coil loop, the coil loop is formed by sequentially connecting P single coils, P is a pole pair number and is an even number; each coil ring is provided with at least one pair of hairpin conductors with the pitch of Y +1 and at least one pair of hairpin conductors with the pitch of Y-1, the hairpin conductors with the pitch of Y +1 and the hairpin conductors with the pitch of Y-1 are uniformly distributed along the circumferential direction, and the pitches of all other hairpin conductors are Y; the deflection directions of the stand bars of the hairpin conductors with the pitch of Y +1 and the stand bars of the hairpin conductors with the pitch of Y-1 in the circumferential direction of the coil ring are the same; the hairpin conductor with the pitch of Y +1 on one branch and the hairpin conductor with the pitch of Y-1 on the other branch on the circumferentially adjacent slot are positioned in the circumferentially adjacent slot.

9. The phase winding of claim 8, wherein the two single-leg conductors on the same single coil are combined into a lead conductor group, the two branches located in circumferentially adjacent slots of the stator in an assembled state are grouped, the single coils on the two branches in the same group are located in circumferentially adjacent slots of the phase winding, and the single coils on the two branches in one group are located adjacent to the single coils on the lead conductor groups on the two branches in the other group in the circumferential direction of the phase winding.

10. The phase winding of claims 1-3, wherein the leg deflection direction and pitch of the hairpin conductor corresponding to the single-leg conductor in each branch are equal.

11. The phase winding of claim 2, wherein the two leg portions of the first and second types of offset U-shaped conductors are offset in the thickness direction of the hairpin body, the second type of offset U-shaped conductor is located between the two leg portions of the first type of offset U-shaped conductor in the thickness direction of the first type of offset U-shaped conductor, and the head portion of the second type of offset U-shaped conductor is wrapped inside the head portion of the first type of offset U-shaped conductor; in an assembly state, the leg part positioned at the same slot position in the stator is divided into a first layer of conductor, a second layer of conductor, a third layer of conductor and a fourth layer of conductor from outside to inside in the radial direction; the two leg parts of the first type of the inclined U-shaped conductor are respectively a first layer conductor and a fourth layer conductor of the slot position where the first type of the inclined U-shaped conductor is located, and the two leg parts of the second type of the inclined U-shaped conductor are respectively a second layer conductor and a third layer conductor of the slot position where the second type of the inclined U-shaped conductor is located.

12. The phase winding of claim 3, wherein the two leg portions of the first and second types of partial U-shaped conductors are offset in the thickness direction of the hairpin body, the second type of partial U-shaped conductor is located between the two leg portions of the first type of partial U-shaped conductor in the thickness direction of the first type of partial U-shaped conductor, and the head portion of the second type of partial U-shaped conductor is wrapped in the head portion of the first type of partial U-shaped conductor; the O-shaped conductor is positioned between two leg parts of the first type of the inclined U-shaped conductor in the thickness direction of the first type of the inclined U-shaped conductor and is arranged in a laminating manner with the second type of the inclined U-shaped conductor; the leg part at the same slot position on the stator is divided into a first layer conductor and a second layer conductor … … A-layer conductor from outside to inside in the radial direction, wherein A is an even number more than 4; the two leg parts of the first type of U-shaped conductor are respectively a first layer conductor and an A layer conductor of a slot position where the first type of U-shaped conductor is respectively located, the two leg parts of the second type of U-shaped conductor are respectively a second layer conductor and a third layer conductor or an (A-1) layer conductor and an (A-2) layer conductor of the slot position where the second type of U-shaped conductor is respectively located, the leg parts of the O-shaped conductor are respectively a 2n layer conductor and a 2n +1 layer conductor or an A-2n layer conductor and an A-2n +1 layer conductor of the slot position where the O-shaped conductor is located, and n is more than or equal to 2 and less than or equal to A/2-1.

13. A stator is characterized by comprising a stator core and multiple phases of phase windings which are arranged on the stator core and are as claimed in any one of claims 1 to 3, 5 to 7 and 9 to 12, wherein power terminals are respectively connected to connecting ends of the multiple phases of phase windings for connecting a power supply, the connecting ends of the multiple phases of phase windings for connecting star points are connected through star point connecting conductors in a welding mode, or all or part of hairpin conductors of the multiple phases of phase windings where the connecting ends for connecting the star points are located are connected in an integrally preformed structure.

14. An electrical machine comprising a stator according to claim 13.