DE112013006750T5 - Electric rotary machine - Google Patents

Abstract

In a rotary electric machine, each of one or more coils comprises: a first conductor wire group disposed in groove interior with respect to the radial direction of a stator core in m layers (m is an integer greater than or equal to 2), a second conductor wire group obtained is, by an arrangement of the first line wire group in a coil end region in relation to the radial direction of the stator core n positions (n is an integer greater than or equal to 1) is converted, a first curvature region which is curved so that the first conductor wire group and the second conductor wire group at an edge between the groove inner and the coil end region include an angle Θ of less than 180 °, a third conductor wire group obtained by arranging the second conductor wire group in the coil end region in one with respect to the radial direction of the stator core Location is arranged to nth location in a relation to the radial direction of the stator core (m - n + 1) -th layer is transferred to m-th layer, and a second curvature region which is curved so that the second conductor wire group and the third conductor wire group in the coil end region at an angle Θ of less than 180 °, the number of layers m and n satisfying the condition n / m ≦ 1/2.

Description

area

The present invention relates to a rotary electric machine.

background

Under current circumstances, such as the impact of soaring commodity prices and international efforts to prevent global warming, awareness of reducing energy consumption, which is a source of carbon dioxide emissions, is increasing. Above all, electric rotary machines, which consume about 40% of the world's gross electricity generation, are attracting a great deal of attention. Therefore, there is an urgent need to improve the efficiency of rotary electric machines.

The stator windings of rotary electric machines are roughly classified into concentrated windings and distributed windings. The advantage of the distributed winding is, for example, that torque ripple and noise can be reduced. A disadvantage of the distributed winding, however, is that a lead wire is long due to the high coil end, thereby increasing the winding resistance, d. H. the copper losses increase and the efficiency deteriorates.

In Patent Document 1, it is mentioned that, in a stator of a three-phase motor, the three U-phase wires arranged inside a groove in the innermost first coil segmenting section, the middle second coil segmenting section and the outermost third coil segmenting section are located in the innermost first end in the region of the coil end Layered and arranged on the outer continuation layer, the three V-phase wires are layered and arranged in the region of the coil end in the middle second outer continuation layer, and the three W-phase wires in the region of the coil end in the outermost third outer continuation layer layered and arranged are. According to Patent Document 1, therefore, the lead wires of the respective phases are stacked in the region of the coil end and arranged in mutually different ones of the outer continuation layers. As a result, the lead wires do not interfere with each other, and the outer diameter of the coil end portion is small.

List of quotes

Patent document

• Patent Document 1: Publication of Japanese Patent Application No. H8-084448 ,

Summary

Technical problem

The outer diameter reduction technology of the coil end portion described in Patent Document 1 is based on the premise that the windings of the individual phases (U-phase, V-phase and W-phase) are formed in divergent shapes. Since the winding lengths of the individual phases differ greatly from one another, it is possible that the deviations between the winding resistance values exceed a permissible range. If the deviations between the winding resistance values exceed an allowable range, this results in an asymmetry of the currents of a rotary electric machine, which causes torque ripple, vibration, and the like.

The technology for reducing the outer diameter of the coil end portion described in Patent Document 1 is based on the premise that the coils are formed in both the groove and the coil end portion in the radial direction in three layers. Therefore, the windings of the respective phases can be divided into only three groups. A use of the technology in various types of rotary electric machines is difficult.

The present invention has been made in view of the above, and an object of the present invention is to provide a rotary electric machine in which the outer diameter of a coil end portion is reduced and the deviations between the winding resistance values of the respective phases are suppressed within an allowable range can be.

Solution to the problem

An aspect of the invention for solving the problems and objects described above relates to a rotary electric machine comprising: a stator core having a ring-shaped core back, a plurality of teeth extending in a radial direction away from the core back and arranged in a circumferential direction , and has a plurality of grooves, the are each arranged between adjacent teeth in the circumferential direction, and a stator winding, which is received and wound in the slots of the stator core, wherein for each phase of the stator winding, a coil is formed as a bundle of lead wires, each of the phase windings of one or more coils is formed which are arranged inside a groove, each of the one or more coils comprising: a first conductor wire group disposed in the groove interior in m layers with respect to the radial direction of the stator core (m is an integer greater than or equal to 2) second conductor wire group obtained by converting an arrangement of the first conductor wire group in a coil end region in n positions (n is an integer greater than or equal to 1) with respect to the radial direction of the stator core, a first curvature region that is curved such that the first conductor wire group and the second conductor wire g a group at a boundary between the groove inside and the coil end region an angle Θ of less than 180 °, a third conductor wire group, which is obtained by an arrangement of the second conductor wire group in the coil end region in a relation to the radial direction of the stator core first layer to the n-th layer, is transferred to a relation to the radial direction of the stator core (m - n + 1) -th layer to m-th layer, and a second curvature region which is curved so that the second conductor wire group and the third conductor wire group in the coil end region enclose an angle Θ 'of less than 180 °, wherein the position numbers m and n satisfy the condition n / m ≦ 1/2.

Advantageous Effects of the Invention

According to the present invention, in each coil of a phase winding, for example, the arrangement of the lead wires in the groove inside can be changed from that at the coil end portion, and the arrangement of the lead wires with respect to the radial direction of the stator core can be rearranged in the middle of the coil end portion. For example, the lead wires in the left half of the coil end portion may be grouped in a region equal to the first layer in the groove interior, while the lead wires in the right half of the coil end portion may be combined in a region arranged in the same direction as the second layer in the groove interior is. Consequently, if coils of the same shape are used for the respective phase windings, then the winding of one phase can be prevented from simply hindering the windings of the other phases in the coil end region, and the height of the coil end region can be reduced. A mechanical obstruction of the phase windings with one another in the coil end region can thus be reduced and the individual phases can be designed with the same (eg identical) winding lengths. As a result, the outer diameter of the coil end portion can be reduced and the deviations between the winding resistance values of the individual phases can be suppressed to within a permissible range.

Brief description of the figures

1 FIG. 10 is a diagram showing a structure of a stator of a rotary electric machine according to a first embodiment. FIG.

2 FIG. 10 is a diagram showing a structure of a coil of a stator winding according to the first embodiment. FIG.

3 shows a graphical representation of a cross section through the rotary electric machine according to the first embodiment.

4 FIG. 10 is a top view of a stator core according to the first embodiment in a state where the coil is inserted in the stator core. FIG.

5 shows a bottom view of a stator core according to the first embodiment in a state in which the coil is inserted into the stator core.

6 FIG. 12 is a side view of the stator core according to the first embodiment in a state where the coil is inserted into the stator core. FIG.

7 FIG. 11 is a graph showing the angles of curvature of the lead wires constituting the coil according to the first embodiment. FIG.

8th shows the winding arrangement for each phase of a stator of the first embodiment in a graph in which the coils are inserted into the stator core.

9 shows a top view of a stator core according to a second embodiment in a state in which the coils are inserted into the stator core.

10 shows a bottom view of a stator core according to the second embodiment in a state in which the coil is inserted into the stator core.

11 FIG. 12 is a side view of the stator core according to the second embodiment in a state where the coil is inserted into the stator core. FIG.

12 FIG. 12 is a graph showing the angles of curvature of the lead wires constituting the coil according to the second embodiment. FIG.

13 shows the winding arrangement for each phase of a stator of the second embodiment in a graph in which the coils are inserted into the stator core.

14 shows a graphical representation of a structure of a coil of a stator winding according to a third embodiment.

15 FIG. 10 is a top view of a stator core according to the third embodiment in a state where the coil is inserted into the stator core. FIG.

16 shows a bottom view of a stator core according to the third embodiment in a state in which the coil is inserted into the stator core.

17 FIG. 12 is a side view of the stator core according to the third embodiment in a state where the coil is inserted into the stator core. FIG.

18 FIG. 12 is a graph for explaining the angles of curvature of the lead wires constituting the coil according to the third embodiment. FIG.

19 shows the winding arrangement for each phase of a stator in a graph in which the coils are inserted into the stator core to form the stator winding of a rotary electric machine according to the third embodiment.

20 shows a top view of a stator core according to a fourth embodiment in a state in which a coil is inserted into the stator core.

21 FIG. 10 is a bottom view of a stator core according to the fourth embodiment in a state where the coil is inserted into the stator core. FIG.

22 FIG. 12 is a side view of the stator core according to the fourth embodiment in a state where the coil is inserted into the stator core. FIG.

23 FIG. 16 is a graph for explaining the angles of curvature of the lead wires constituting the coil according to the fourth embodiment. FIG.

24 shows the winding arrangement for each phase of a stator in a graph in which the coils are inserted into the stator core to form a stator winding of a rotary electric machine according to the fourth embodiment.

25 FIG. 10 is a diagram showing a structure of a coil of a stator winding according to a fifth embodiment. FIG.

26 FIG. 11 is a top view of a stator core according to the fifth embodiment in a state where the coil is inserted into the stator core. FIG.

27 FIG. 12 is a bottom view of the stator core according to the fifth embodiment in a state where the coil is inserted into the stator core. FIG.

28 FIG. 10 is a side view of the stator core according to the fifth embodiment in a state where the coil is inserted into the stator core. FIG.

29 FIG. 12 is a graph for explaining the angles of curvature and dimensions of the lead wires constituting the coil according to the fifth embodiment. FIG.

30 shows the winding arrangement for each phase of a stator in a graph in which the coils are inserted into the stator core to form the stator winding of a rotary electric machine according to the fifth embodiment.

31 shows a top view of a stator core according to a sixth embodiment in a state in which a coil is inserted into the stator core.

32 shows a bottom view of the stator core according to the sixth embodiment in a state in which the coil is inserted into the stator core.

33 FIG. 12 is a side view of the stator core according to the sixth embodiment in a state where the coil is inserted into the stator core. FIG.

34 FIG. 10 is a top view of a stator core according to a seventh embodiment in a state where a coil is inserted in the stator core. FIG.

35 shows a bottom view of the stator core according to the seventh embodiment in a state in which the coil is inserted into the stator core.

36 FIG. 12 is a side view of the stator core according to the seventh embodiment in a state where the coil is inserted into the stator core. FIG.

37 11 is a top view of a stator core according to a modification of the first to seventh embodiments in a state where a coil is inserted into the stator core.

38 FIG. 10 is a top view of the stator core according to a modification of the first to seventh embodiments in a state where coils are inserted into the stator core. FIG.

39 FIG. 10 is a top view of the stator core according to a modification of the first to seventh embodiments in a state where coils are inserted into the stator core. FIG.

40 FIG. 10 is a diagram showing a structure of a coil pack for forming a stator winding according to the modification of the first to seventh embodiments. FIG.

41 FIG. 10 is a top view of a stator core according to a modification of the first to seventh embodiments in a state where a coil package is inserted into the stator core. FIG.

42 FIG. 10 is a diagram showing a structure of a coil group for forming a stator winding according to a modification of the first to seventh embodiments. FIG.

Description of embodiments

Hereinafter, exemplary embodiments of a rotary electric machine according to the present invention will be described in detail with reference to the drawings. It should be noted that the present invention is not limited to the embodiments.

First embodiment

It becomes an electric rotary machine 1 explained according to a first embodiment.

The electric rotary machine 1 has a stator and a rotor. The rotor rotates relative to the stator, transmits rotational power to a machine device (not shown) via a shaft (not shown) attached to the rotor, and drives the machine device. In the electric rotary machine 1 For example, it may be a permanent magnet rotor type rotary electric machine or an induction machine type rotary electric machine. In the electric rotary machine 1 is in a stator 3 for example, arranges a winding structure.

The electric rotary machine 1 points, in particular as in the 1 to 3 illustrated structures. The perspective view of 1 shows the structure of a stator core and a stator winding of the rotary electric machine 1 , The perspective view of 2 shows the structure of a coil of the stator winding. The graphic representation of the 3 shows the structure of rotor and stator core when viewed in the direction of the rotation axis RA. In the 1 to 3 is an example of the electric rotary machine 1 a rotary electric machine illustrated in which the number of poles 4 , the number of grooves 24 , the number of phases 3 and the number of grooves q for each pole and each phase 2 is. To simplify the illustration is in 3 the stator winding not shown.

As in 1 and 3 illustrated includes the rotary electric machine 1 a rotor 2 and the stator 3 , The rotor 2 has a rotor core 2a and several permanent magnets 2 B on. The rotor core 2a is formed concentric with a shaft. The rotor core 2a has, for example, a substantially columnar shape with a rotational axis RA extending along the shaft. The several permanent magnets 2 B are along the peripheral surface of the rotor core 2a arranged. It should be noted that in 3 the rotor 2 is shown as a Permanentmagnetläufertyprotor. At the rotor 2 However, it may also be a squirrel-cage rotor, which is formed of a conductor such as copper in the form of a cage.

The stator 3 is designed to be the rotor 2 receives, but spatially separated from the rotor 2 is arranged. The stator 3 has, for example, a stator core 5 and a stator winding 6 on.

The starter core 5 is designed concentric to the wave. The stator core 5 has, for example, a substantially cylindrical shape with an axis of rotation RA extending along the shaft. The stator core 5 is formed, for example, from a package of magnetic steel sheets.

The stator core 5 points as in 3 for example, a core spine is shown 7 , several teeth 8th and several grooves 9 on. The core back 7 is annular and has, for example, a substantially cylindrical shape. Each of the several teeth 8th extends from the core back 7 in the radial direction to the axis of rotation RA. The several teeth 8th are on the axis of rotation RA facing side of the core spine 7 in one along a peripheral surface 7a of the core back 7 (ie, a circumferential direction) extending direction arranged. The grooves 9 are each between the circumferentially adjacent teeth 8th arranged.

At the stator winding 6 are coils belonging to the same phase, each in two slots of the stator core 5 added. The stator winding 6 gets into the grooves 9 used, with the periphery of the stator winding 6 by, for example, an insulating paper is protected. In the stator winding 6 is a coil 17 as a bundle of wires 11 educated. Inside the grooves 9 are one or more coils 17 arranged. To form the stator winding 6 become the ends of the coils 17 associated with a process such as welding.

In the stator winding 6 are coils for each of the phases 17 formed similar shape. For example, the in 2 shown coil 17 educated. The spools 17 be as loop windings in the grooves 9 of the stator core 5 used so that coils of the same phase can be used close to each other. The sink 17 is as a bundle of wires 11 educated.

Specifically, the coil includes 17 a first conductor wire group 17a , a second conductor wire group 17b , a first curvature area 17d , a third conductor wire group 17c , a second curvature area 17e , a fourth conductor wire group 17f and a third curvature area 17g ,

The wires 11 the first conductor wire group 17a are inside a groove inner SI in the radial direction of the stator core 5 arranged in m-layers (m is an integer greater than or equal to 2).

The second conductor wire group 17b arises by the arrangement of the first conductor wire group 17a in a coil end region CE1 in the radial direction of the stator core 5 in n-positions (n is an integer greater than or equal to 1) is transferred. For example, the lead wires 11 the second conductor wire group 17b in the coil end region CE1 within a radial direction of the stator core 5 first layer arranged to the nth position.

The first curvature area 17d is curved so that the first conductor wire group 17a and the second conductor wire group 17b enclose an angle Θ (90 ° <Θ <180 °) at the boundary of the groove inner SI to the coil end region CE1. This means that at the first curvature area 17d comprehensive arrangement change section 10d a change in the arrangement of the first line wire group 17a in the groove inside SI in an arrangement of the second line wire group 17b takes place at the coil end region CE1.

The third conductor wire group 17c is obtained by placing in the coil end region CE1 the arrangement of the second conductor wire group 17b in a radial direction of the stator core 5 (m - n + 1) -th layer is transferred to m-th layer. The wires 11 the third conductor wire group 17c are in the coil end region CE1 with respect to the radial direction of the stator core 5 arranged in the (m - n + 1) -th layer to m-th position.

The second curvature area 17e is curved so that the second conductor wire group 17b and the third conductor wire group 17c in the coil end region CE1 an angle Θ '(= 360 ° - (Θ + Θ'')) include. This means that at the second curvature area 17e comprehensive transfer area modification section 13a a change of the arrangement (in the radial direction of a transfer region) of the second lead wire group 17b of the coil end region CE1 in an arrangement (in the radial direction of a transfer region) of the third lead wire group 17c of the coil end region CE1.

The wires 11 the fourth conductor wire group 17f are inside the groove SI in with respect to the radial direction of the stator core 5 m layers (m is an integer greater than or equal to 2) arranged.

The third curvature area 17g is curved so that the third lead wire group 17c and the fourth conductor wire group 17f at the boundary between the coil end region CE1 and the groove inner SI an angle Θ '' (90 ° <Θ ''<180 °) include. This means that at the third curvature area 17g comprehensive arrangement change section 10a a change in the arrangement of the third conductor wire group 17c of the coil end region CE1 into an arrangement of the fourth conductor wire group 17f of the groove inner SI takes place.

The number of layers m and n satisfy the following formula 1: n / m ≤ 1/2 formula 1

In the groove inside SI, the coil points 17 from 2 for example, two (in the radial direction of the stator core 5 arranged) layers of lead wires 11 eight each (in the circumferential direction of the stator core 5 arranged) pieces. The number in the radial direction and the number in the circumferential direction may be determined, for example, as explained below.

At the in 2 As shown, the winding arrangement of the coil changes 17 for example, at the transition from the groove inner SI to the coil end region CE1 (at which the first curvature region 17d comprehensive arrangement change section 10d ). Consequently, a bundle of wires will be made 11 in the groove inside SI in two (in the radial direction of the stator core 5 arranged) layers of eight (in the circumferential direction of the stator core 5 arranged) are arranged in the coil end region CE1 (arranged in the radial direction of the stator core) in a position with (in the circumferential direction of the stator core 5 arranged) 16 pieces of lead wires 11 arranged. At this point, the lead wires become 11 in the first curvature area 17d around the angle Θ (in 2 for example 120 °) bent.

Following this, for example, the arrangement of the lead wires 11 in the coil end region CE1 from the radial direction of the stator core 5 first layer (at which the second curvature area 17 comprehensive transfer area modification section 13a ), for example, with respect to the radial direction of the stator core 5 second layer transferred so that the windings of other phases (the coils 17 other phases) are not hindered. Also at this point before and after the arrangement transfer, that is in the second curvature area 17e , the wires become 11 at an angle Θ '(in 2 for example 120 °) bent.

Thereafter, the winding assembly at the transition of the lead wires 11 from the coil end region CE1 to the groove inner SI (at which the third curvature region 17g comprehensive arrangement change section 10a ). Consequently, the bundle of wires becomes 11 in the coil end region CE1 in a (in the radial direction of the stator core 5 arranged) position with (in the circumferential direction of the stator core 5 arranged) 16 pieces are arranged in Nutinneren in two (in the radial direction of the stator core 5 arranged) layers of eight (in the circumferential direction of the stator core 5 arranged) pieces arranged. Also at this point are the lead wires 11 bent by an angle Θ '' (in 2 for example 120 °).

In an embodiment of the coil as explained above 17 The coil has a triangular shape in the coil end region CE1. Although not explained, the arrangement of the lead wires is changed 11 in the lower half of the coil 17 in the same way. The sink 17 has an overall hexagonal shape including the triangular shape of the coil end portion CE1, a square shape of the groove inner SI, and a triangular shape of the coil end portion CE2.

With reference to the 4 to 6 becomes a winding arrangement changing area of the coil 17 explained in more detail. 4 shows a plan view of the stator core 5 (viewed from the direction of the rotation axis RA) in a state with in the stator core 5 inserted coil 17 , 5 is a bottom view of the stator core 5 in a state with in the stator core 5 inserted coil 17 , 6 is a side view of the stator core 5 (viewed from the surface facing the axis of rotation RA) in a state with in the stator core 5 inserted coil 17 ,

The 4 to 6 illustrate a state in which the lead wires 11 a coil 11 in two (with respect to the radial direction of the stator core 5 arranged) layers of two (with respect to the circumferential direction of the stator core 5 arranged) pieces are inserted into the Nutinnere. The following is using the positions 12a to 12r clearly explained, as in this case, the lead wires 11 to form the coil 17 be wrapped.

At the coil 17 begins the winding of the conductor wire 11 near the middle between the two grooves 9a and 9b (at the position 12a ) and approaches the groove 9a after passing through a region CE1a, which is arranged in the coil end region CE1 equal to the first layer in the groove inner SI. Then the arrangement of the conductor wire 11 changed (at the arrangement change section 10a ) to at the position 12b (please refer 4 ) enter the second layer of the groove inner SI. When looking at this area from the side, the lead wire is 11 bent by the angle Θ '' (see 6 and 7 ).

The arrangement of the guided through the Nutinnere SI conductor wire 11 changes (at the arrangement change section 10b ) when leaving the position 12c (please refer 5 ), the conductor wire 11 in a region CE2a, which is arranged in the coil end region CE2 equal to the first layer in the groove inner SI (see 2 ). When looking at this area from the side, the lead wire is 11 bent by the angle Θ (see 6 and 7 ).

The conductor wire 11 runs to the groove 9b on the opposite side. When approaching the conductor wire 11 to the middle between the groove 9a and groove 9b changes (at the transfer area changing section 13b ) the arrangement of the conductor wire 11 in order to pass through a region CE2b, which is now in the coil end region CE2 equal to the second layer in the groove inner SI (see 2 ). When looking at this area from the side, the lead wire is 11 bent by the angle Θ '(see 6 and 7 ).

When approaching the conductor wire 11 to the groove 9b changes (at the arrangement change section 10c ) the arrangement of the conductor wire 11 so that he is at the position 12d flows into the first position in the groove inner SI. When looking at this area from the side, the lead wire is 11 bent by the angle Θ '' (see 6 and 7 ).

The arrangement of the guided through the Nutinnere SI conductor wire 11 changes (at the arrangement change section 10d ) when leaving the position 12e , wherein the conductor wire 11 exits in a region CE1b, which is arranged in the coil end region CE1 equal to the second layer in the groove inner SI (see 2 ). When looking at this area from the side, the lead wire is 11 bent by the angle Θ.

The conductor wire 11 runs to the groove 9a on the opposite side. When approaching the conductor wire 11 to the middle between the groove 9a and groove 9b changes (at the transfer area changing section 13b ) the arrangement of the conductor wire 11 to now pass through an area CE1a, which lies in the coil end region CE1 equal to the first position in the groove inner SI. (please refer 2 ). When looking at this area from the side, the lead wire is 11 bent by the angle Θ '.

The the coil 17 forming conductor wire 11 is once wound as explained above. Thereafter, the lead wire is similarly in the sequence of position 12f , the position 12g , the position 12h , ..., the position 12p and the position 12q wound. It should be noted that, in the side view of the coil end portions CE1 and CE2, four lead wires 11 are arranged side by side. For example, the second winding and the third winding of the conductor wire 11 as in 6 shown further to the inside.

In the first winding and the second winding of the conductor wire 11 the change of the arrangement takes place at the arrangement change sections 10a to 10d each at the entrance of the conductor wire 11 into the groove interior SI or at the exit of the conductor wire 11 from inside the groove SI. In the third winding and fourth winding of the conductor wire, however, no arrangement change takes place in and of itself. In the case of the second winding and the fourth winding, the conductor wire coming from the region CE1a opens 11 , which is arranged in the coil end region CE1 equal to the first layer in the groove inside, at the positions 12f and 12n sometimes directly into the first location in the interior of the groove SI. On the other hand, it ends at the positions 12o and 12g Lead wire coming from the first position inside the groove inside SI 11 For example, sometimes in the region CE2a, which is arranged in the coil end region CE2 equal to the first layer in the groove inner SI. On the other hand, the wire coming from the region CE2b opens 11 placed in the coil end region CE2 equal to the second layer in the groove inner SI at the positions 12h and 12p sometimes, for example, directly into the second layer of the groove inside SI. On the other hand, for example, leaves at the positions 12q and 12i from the second layer in Nutinneren SI coming wire 11 sometimes the area CE1b, which is arranged in the coil end region CE1 equal to the second layer in the groove inner SI.

The winding of the conductor wire 11 Finally ends near the middle between the two grooves 9a and 9b (at the position 12r ). That way, the coil can 17 with a different arrangement of wires 11 in the groove inner SI and the coil end regions CE1 and CE2 are formed.

It should be noted that the above procedure for making the coil 17 with a different arrangement of lead wires in the groove inner SI and the coil end regions CE1 and CE2 11 representing an illustration. It is not essential to use the coil 17 to produce according to this method. In the method given in this explanation, the winding of the coil starts 17 near the middle between the two grooves 9a and 9b (at the position 12a ) and ends at the same position (at the position 12r ). That the winding start and the winding end are arranged at this position, however, is not absolutely necessary. As explained below, when viewed from the side, the vicinity of the center between the groove corresponds 9a and the groove 9b near the apex of the coil end portions CE1 and CE2 having a triangular shape. When connecting multiple coils 17 is done so that the coils 17 Connecting wire does not easily obstruct other wires of other phases.

The in the 4 and 5 illustrated transfer area change sections 13a and 13b indicate at the point where the arrangement of the wires 11 changes to a substantially right-angled crank shape. However, if in the coil end region CE1 a transition is created between the regions CE1a and CE1b, the conductor wire 11 happens, the transfer area change sections 13a and 13b not always be formed in the approximately rectangular crank shape. For example, the transition between the areas without cranking may similarly change in a straight line shape. Also at the transition of the arrangement of the wires 11 from the groove inner SI to the coil end regions CE1 and CE2 are the arrangement change sections 10a to 10d similarly formed in a substantially rectangular crank shape. Unless the purpose of a Changing the arrangement of the lead wires is achieved, the arrangement change sections 10a to 10b not necessarily be formed in an approximately rectangular cranked shape.

7 shows a graphical representation for explaining the bending angle of the coil 17 forming wires 11 ,

The bending angle Θ "at the arrangement changing section 10a For example, it represents an angle that is from a direction DR17c of the third conductive wire group 17c and a running direction DR17f of the fourth conducting wire group 17f is formed, wherein the angle to the inside of the coil 17 is directed. The sink 17 is formed when viewed from the side in an approximately hexagonal shape. Therefore, the angle Θ "satisfies, for example, a condition of the following formula 2: 90 ° <Θ ''<180 ° Formula 2

The formula 2 fulfilling angle Θ '' is for example 120 °.

The curvature angle Θ at the arrangement change section 10d For example, it represents an angle that is from a running direction DR17a of the first line wire group 17a and a running direction DR17b of the second line wire group 17b is formed, wherein the angle to the inside of the coil 17 is directed. The angle Θ satisfies a condition of the following formula 3: 90 ° <Θ <180 ° Formula 3

The angle Θ satisfying the formula 3 is, for example, 120 °.

The curvature angle Θ 'at the transfer range changing portion 13a For example, it represents an angle that is from a direction DR17b of the second line wire group 17b and a running direction DR17c of the third line wire group 17c is formed, wherein the angle to the inside of the coil 17 is directed. The angle Θ 'satisfies a condition of the following formula 4: Θ '= 360 ° - (Θ + Θ'') Formula 4

Own the coil 17 for example, as in the 6 and 7 shown symmetrical shape, then the following formula 5 applies: Θ = Θ '' Formula 5

By substituting formula 5 in formula 4, the following formula 6 is obtained: Θ '= 360 ° - 2Θ formula 6

If the angle Θ = Θ '' is 120 °, then the angle Θ 'is 120 °.

8th shows a graphical representation of the winding arrangement of each phase of the stator 3 in its stator core 5 the spools 17 for the formation of the stator winding 6 the electric rotary machine 1 are used. Coils of the same phase are in 8th used in two grooves, since the number of slots per pole and phase is equal to 2 (eight poles, forty-eight slots). The spools 17 are in the form of a loop winding in grooves spaced by four grooves 9 of the stator core 5 used to allow the coils 17 same phase can be arranged close to each other. It should be noted that the in 8th shown stator core 5 for ease of explanation in a rectilinear form and one half of the stator core 5 partly omitted.

For example, a V-phase winding V8 includes the coil 17 By moving the coil 17 a winding U8 of the U phase in the in 8th right direction is obtained by two grooves along the circumferential direction. For example, a W-phase winding W8 includes the coil 17 By moving the coil 17 a winding V8 of the V phase in the in 8th right direction is obtained by two grooves along the circumferential direction. That means that when you're in 8th the right end of the coils 17 Consider the arrangement pattern of the coils distributed with an offset of two slots 17 of U-phase, V-phase and W-phase repeated in a cycle of six grooves. Each of the coils 17 extends in the coil end region CE1 via six grooves. Each of the coils 17 in the first layer covers the left three and in the second position the right three grooves.

The stator winding 6 is formed according to the method explained above. Because by reducing the distance between the grooves 9 (eg, the shortest distance) may be the circumferential length of the coils 17 be reduced. The main advantage of using the coils 17 with the short circumferential length to form the stator winding 6 is that also the circumferential length of the entire stator winding 6 can be reduced, resulting in a reduction in engine losses by reducing the value of the winding resistance and improving the efficiency of the engine use.

When it is attempted to form the winding circuit by cyclically arranging the coils so that each, as explained above, in the coil end regions CE1 and CE2, a straight, approximately parallel to the circumferential direction connection between the grooves 9 creates, then the sections, in which the Windings of the U phase, the V phase and the W phase hinder each other. If the stator winding is deflected to avoid obstruction, then the circumferential length of the entire stator winding or the height of the coil end areas increase. As the height of the coil end regions increases slightly, it is likely that the length of the conductor wire and thus the winding resistance increase, ie the copper loss increases and the efficiency deteriorates.

In contrast, by the coils described above 17 are used in the present embodiment, the lead wires 11 in the left half of the coil end region CE1 in the region CE1a (see 4 ) to the first layer of Nutinneren SI are arranged gleichauf arranged and the lead wires 11 in the right half of the coil end region CE1 can in the area CE1b (see 4 ) are combined to the second position of the groove inside SI arranged gleichauf arranged. As a result, the windings of the U phase, the V phase and W phase are hindered to a lesser extent. Out 8th One might get the impression that there is an area where the coils used in the U-phase, V-phase and W-phase are 17 overlap each other. The respective coils 17 However, are formed in the coil end regions CE1 and CE2 triangular. Near the middle of the coils 17 (The crank-shaped areas in the transfer area changing sections 13a and 13b ) these correspond to a vertex of the triangle shape. As a result, the windings of U-phase, V-phase and W-phase impede mechanically to a lesser extent. In this way, the height of the coil end portions CE1 and CE2 can be reduced and the stator winding 6 using the coils 17 be formed with the short circumferential length.

Operation and effects according to the first embodiment will be explained.

As a first effect, for example, the arrangement of the lead wires changes 11 (at the arrangement change sections 10a to 10d ) from the groove inner SI to the coil end regions CE1 and CE2, and the arrangement of the lead wires 11 in the coil end areas CE1 and CE2 (in the transfer area changing sections 13a and 13b ) with respect to the radial direction of the stator core 5 , Thereby, the obstruction of other phase windings by a phase winding in the coil end regions CE1 and CE2 is smaller, and the height of the coil end regions CE1 and CE2 can be reduced.

It should be noted that when the (with respect to the radial direction of the stator core 5 ) two-layer arrangement of wire bundles within the groove inside SI in the coil end regions CE1 and CE2 as in FIG 2 illustrated in (with respect to the radial direction of the stator core 5 ) is transferred and the bent portions are formed so that the coil 17 has an overall hexagonal shape, an unusable space in which the lead wires 11 are not located in the coil end regions CE1 and CE2, can be downsized (eg, so far that the unusable space is substantially no longer present). As a result, the arrangement density (the filling factor) of the lead wires 11 (For example, so that the wires are arranged very close to each other) can be effectively improved. As a result, the size of the coil end regions CE1 and CE2 can be downsized as a whole.

As a second effect, in the stator winding 5 Do the washing up 17 same shape for all phases, U-phase, V-phase and W-phase can be used. Therefore, since the work efficiency for producing the windings can be improved and the winding length can be made equal (eg, identical) in each of the phases, the deviations in the winding resistance values of the respective phases can be suppressed within a permissible range. This can reduce torque ripple and vibration.

As explained above, in the first embodiment, in the rotary electric machine, the winding of each phase of the stator winding is explained 6 of one or more coils 17 educated. For each of the coils 17 is the first lead wire group 17a inside the groove inner SI with respect to the radial direction of the stator core 5 arranged in m layers (m is an integer greater than or equal to 2). At the second conductor wire group 17b becomes the arrangement of the first conductor wire group 17a in the coil end region CE1 with respect to the radial direction of the stator core 5 in n positions (n is an integer greater than or equal to 1). The first curvature area 17d is bent so that the first conductor wire group 17a and the second conductor wire group 17b at the boundary between the groove inner SI and the coil end region CE1 an angle Θ of less than 180 °. At the third conductor wire group 17c becomes the arrangement of the second line wire group 17b in the coil end region in the radial direction of the stator core 5 is arranged in the first to n-th position, with respect to the radial direction of the stator core 5 (m - n - 1) -th layer transferred to m-th layer. The second curvature area 13a is bent so that the second conductor wire group 17b and the third conductor wire group 17c enclose in the coil end region CE1 an angle Θ 'of less than 180 °. The number of layers m and n satisfies the condition m / n ≦ 1/2. Therefore, for example, in each of the coils 17 that the winding of each phase form, the arrangement of the lead wires 11 are changed from the inside SI of the grooves to the coil end portions CE1 and CE2 (at the arrangement change portions 10a to 10d ), the arrangement of the lead wires 11 with respect to the radial direction of the stator core 5 in the middle of the coil end portions CE1 and CE2 (the transfer range changing portions) 13a and 13b ) can be converted. For example, the lead wires 11 in the left half of the coil end region CE1 in the region CE1a (see 4 ) to the first layer of Nutinneren SI arranged gleichauf arranged and the lead wires 11 in the right half of the coil end region CE1 can in the area CE1b (see 4 ) are combined to the second position of the groove inside SI arranged gleichauf arranged. Therefore, when the coils for the windings of the respective phases 17 to prevent the winding of one phase in the coil end regions CE1 and CE2 from simply obstructing the windings of the other phases, the height of the coil end regions CE1 and CE2 can be reduced. This means that the mechanical interference of the windings of the respective phases in the coil end regions CE1 and CE2 can be reduced and the winding length of each phase can be made equal (eg identical). As a result, the outer diameter of the coil end portions can be reduced, and the deviations between the coil resistance values of the respective phases can be suppressed within a permissible range.

In the first embodiment, coils may be used for the windings of the respective phases 17 be used the same shape. This can simplify the work of connecting the wires and the manufacturing cost of the rotary electric machine 1 can be lowered.

In the first embodiment, the second curvature region 17e when viewed from the rotation axis RA, for example, a crank shape at which the arrangement between the second lead wire group 17b and the third conductor wire group 17c changes in the radial direction. Therefore, the lead wires 11 in the left half of the coil end region CE1 in the region CE1a (see 4 ) to the first layer in the interior SI of the groove arranged in the same direction summarized and the lead wires 11 in the right half of the coil end region CE1 in the region CE1b (see 4 ) are combined to the second position in the interior SI of the groove arranged gleichauf. As a result, if for the windings of the respective phases, the coils 17 the same shape can be prevented, that the winding of one phase simply prevents the windings of the other phases in the coil end regions CE1 and CE2.

In the first embodiment, the fourth conductor wire group is 17f at every coil 17 , which forms the winding of each phase, in the groove inner SI with respect to the radial direction of the stator core 5 m-lagig (m is an integer greater than or equal to 2) arranged. The third curvature area 17g is bent so that the third lead wire group 17c and the fourth conductor wire group 17f at the boundary between the coil end region CE1 and the groove inner SI an angle Θ '' of less than 180 °.
The angle Θ '' satisfies the condition 90 ° <Θ ''<180 °.
The angle Θ satisfies the condition 90 ° <Θ <180 °.
The angle Θ 'satisfies the condition Θ' = 360 ° - (Θ + Θ '').

Therefore, for example, each of the winding forming a phase coil 17 be formed in a hexagonal shape. As a result, the coils can 17 are easily formed so that the mechanical obstruction of the windings of the respective phases in the coil end regions CE1 and CE2 is reduced and at the same time coils in the windings of the respective phases 17 same configuration can be used.

For example, in the first embodiment, the angle Θ and the angle Θ "are the same. The angle Θ 'satisfies the condition Θ' = 360 ° - 2Θ. Thus, for example, each of the coils forming the winding of each phase 17 in one, when viewed in a direction perpendicular to the side surface of the teeth 8th (please refer 6 ), symmetrical hexagonal shape. Consequently, the deviations in the winding resistance values of the respective phases can be further reduced.

Second embodiment

It becomes an electric rotary machine 200 explained according to a second embodiment. In the following explanations mainly differences to the first embodiment will be explained.

In the first embodiment, the coil has been explained vividly, in which with respect to the radial direction in the Nutinneren SI two-layer arrangement of the lead wires 11 is changed into a single-layer arrangement with respect to the radial direction in the coil end regions CE1 and CE2. In the second embodiment, a coil will be explained illustratively, in which with respect to the radial direction in Nutinneren SI three-layer arrangement of the lead wires 11 is changed into a single-layer arrangement with respect to the radial direction in the coil end regions CE1 and CE2.

The formation of each of the coils forming the windings of the respective phases 217 a stator winding 206 a stator 203 the electric rotary machine 200 differs from the embodiment of the first embodiment, as from the 9 to 11 is apparent, specifically in the points set out below. 9 shows a plan view of the stator core 5 in a state where the coil 217 in the stator core 5 is used. 10 shows a view from below of the stator core 5 in the stator core 5 inserted coil 217 , 11 FIG. 10 shows a side view of the stator core (viewed from the surface facing the rotation axis RA). FIG 5 in a state where the coil 217 in the stator core 5 is introduced.

The 9 to 11 show a condition in which a coil 217 is inserted in the groove inside SI (in the radial direction of the stator core 5 ) three layers of lead wires á (in the circumferential direction of the stator core 5 ) has two pieces. Like the lead wires in this case to form the coil 217 is below using position characters 22a to 22z vividly executed.

At the coil 217 begins the winding of the conductor wire 21 near the middle between the two grooves 9a and 9b (at the position 22a ) and approaches the groove 9a after passing through the region CE1a, which is arranged in the coil end region CE1 equal to the first layer in the groove inner SI (see 2 ). Then the arrangement of the conductor wire 21 (at the arrangement change section 20a ) changed to at the position 22b (please refer 9 ) to enter the third position in the groove inner SI. When looking at this area from the side, the lead wire is 21 bent by the angle Θ '' (see 11 and 12 ).

The arrangement of the guided through the Nutinnere SI conductor wire 21 changes (at the arrangement change section 20b ) when leaving the position 22c (please refer 10 ), the conductor wire 21 in a region CE2a, which is arranged in the coil end region CE2 equal to the first layer in the groove inner SI (see 2 ). When looking at this area from the side, the lead wire is 21 bent by the angle Θ (see 11 and 12 ).

The conductor wire 21 runs to the groove 9b on the opposite side. When approaching the conductor wire 21 to the middle between the groove 9a and groove 9b changes (at the transfer area changing section 23b ) the arrangement of the conductor wire 21 to now pass through an area CE2b, which now lies in the coil end area CE2 equal to the third position in the groove inner SI (see 2 ). When looking at this area from the side, the lead wire is 21 bent by the angle Θ '(see 11 and 12 ).

When approaching the conductor wire 21 to the groove 9b (at the arrangement change section 20c ) changes the arrangement of the conductor wire 21 so that he is at the position 22d (please refer 10 ) opens into the first layer in the groove inner SI. When looking at this area from the side, the lead wire is 21 bent by the angle Θ '' (see 11 and 12 ).

The arrangement of the guided through the Nutinnere SI conductor wire 21 changes (at the arrangement change section 20d ) when leaving the position 22e (please refer 9 ), the conductor wire 21 in a region CE1c, which is arranged in the coil end region CE1 equal to the third layer in the groove inner SI (see 2 ). When looking at this area from the side, the lead wire is 21 bent by the angle Θ.

The conductor wire 21 runs to the groove 9a on the opposite side. When approaching the conductor wire 21 to the middle between the groove 9a and groove 9b changes (at the transfer area changing section 23a ) the arrangement of the conductor wire 21 in order to again pass through the region CE1a, which lies in the coil end region CE1 equal to the first layer in the groove inner SI (see 2 ). When looking at this area from the side, the lead wire is 21 bent by the angle Θ '.

The the coil 217 forming conductor wire 21 is once wound as explained above. Subsequently, the conductor wire 21 in the same way in the sequence of the position 22f , the position 22g , the position 22h , ..., the position 22x and the position 22y wound. It should be noted that in the side view of the coil end portions CE1 and CE2 six lead wires 21 are arranged side by side. For example, the conductor wire 21 at the second winding and the third winding of the conductor wire 21 as in 11 shown more towards the inside.

In the first winding, second winding, fourth winding and fifth winding of the conductor wire 21 the change of the arrangement takes place at the arrangement change sections 20a to 20d each at the entrance of the conductor wire 21 into the groove interior SI or at the exit of the conductor wire 21 from inside the groove SI. At the third winding and sixth winding of the conductor wire 21 However, there is no order change in and of itself. For example, the conductor wire coming from the region CE1a opens 21 in the coil end region CE1 is arranged gleichauf to the first layer in the groove inside SI, at the positions 22j and 22v sometimes directly into the first layer in the groove interior SI. Alternatively, the one at the positions 22w and 22k from the first layer of Nutinneren SI coming wire 21 For example, sometimes exit in the region CE2a, which is arranged in the coil end region CE2 equal to the first layer in the groove inner SI. Alternatively, the conductor wire coming from the region CE2c emerges 21 placed in the coil end region CE2 equal to the third layer in the groove inner SI at the positions 22l and 22x For example, sometimes directly into the third layer of the groove inner SI. Alternatively, for example, opens at the positions 22y and 22m from the third layer in Nutinneren SI coming wire 21 sometimes in the area CE1c, which is arranged in the coil end region CE1 equal to the third layer in the groove inner SI.

The winding of the conductor wire 21 Finally ends near the middle between the two grooves 9a and 9b (at the position 22z ). That way, the coil can 217 with a different arrangement of wires 21 in the groove inner SI and the coil end regions CE1 and CE2 are formed.

12 shows a graphical representation for explaining the bending angle of the coil 217 forming wires 21 ,

The bending angle Θ "at the arrangement changing section 20a For example, it represents an angle that is different from the running direction DR17c of the third conductive wire group 17c and the extending direction DR17f of the fourth line wire group 17f is formed, wherein the angle to the inside of the coil 217 is directed. The sink 217 is formed in lateral view in approximately hexagonal shape. Therefore, the angle Θ "satisfies, for example, the condition of the above formula 2. The angle Θ" satisfying the formula 2 is, for example, 120 °.

The curvature angle Θ at the arrangement change section 20d For example, it represents an angle that is different from the direction of travel DR17a of the first conductive wire group 17a and the direction DR17b of the second line wire group 17b is formed, wherein the angle to the inside of the coil 217 is directed. The angle Θ satisfies the condition of the above formula 3. The angle Θ satisfying the formula 3 is, for example, 120 °.

The curvature angle Θ 'at the transfer range changing portion 23a For example, it represents an angle that is different from the direction DR17b of the second conductive wire group 17b and the extending direction DR17c of the third line wire group 17c is formed, wherein the angle to the inside of the coil 217 is directed. The angle Θ 'satisfies the condition of the formula 4 given above.

Own the coil 217 for example, as in 11 and 12 shown symmetrical shape, then the above-mentioned formula 5. The above-mentioned formula 6 is obtained by substituting formula 5 in formula 4.

13 shows a graphical representation of the winding arrangement of each phase of the stator 203 in its stator core 5 the spools 217 for the formation of the stator winding 206 the electric rotary machine 200 are used. Do the washing up 217 same phase are in 13 used in two grooves, since the number of slots per pole and phase is equal to 2 (eight poles, forty-eight slots). The spools 217 are in the form of a loop winding in grooves spaced by four grooves 9 of the stator core 5 used to allow the coils 217 same phase can be arranged close to each other. It should be noted that the in 13 shown stator core 5 for ease of explanation in a rectilinear form and one half of the stator core 5 partly omitted.

For example, a V-phase winding V8 includes the coil 217 By moving the coil 217 the winding U8 of the U phase in the in 12 right direction is obtained by two grooves along the circumferential direction. The winding W8 of the W phase includes, for example, the coil 217 By moving the coil 217 the winding V8 of the V-phase in the in 13 right direction is obtained by two grooves along the circumferential direction. That means that when you're in 13 the right end of the coils 217 Consider the arrangement pattern of the coils distributed with an offset of two slots 217 of U-phase, V-phase and W-phase repeated in a cycle of six grooves. Each of the coils 217 extends in the coil end regions over six grooves. Each of the coils 217 spans the left three grooves in the first layer and the right three grooves in the third layer.

As explained above, in the second embodiment, the arrangement of the lead wires changes 21 from three positions in the groove inner SI with respect to the radial direction, with respect to the radial direction, a position in the coil end regions CE1 and CE2. For example, the lead wires 21 if the lead wires 21 in the middle of the coil end portions CE1 and CE2 are crank-shaped in the left half of the coil end portion CE1 in the area CE1a (see FIG 9 ) to the first layer of Nutinneren SI are arranged gleichauf arranged, while the lead wires 21 in the right half of the coil end region CE1 in the region CE1c (see 9 ) are summarized to the third position of Nutinneren SI arranged gleichauf arranged. Therefore, when the coils for the windings of the respective phases 217 of the same shape prevent the winding of one phase in the coil end regions CE1 and CE2 from simply hindering the windings of the other phases, the height of the Coil end regions CE1 and CE2 can be reduced. This means that the mechanical interference of the windings of the respective phases in the coil end regions CE1 and CE2 can be reduced and the winding length for each phase can be made equal (eg identical). As a result, the outer diameter of the coil end portions when the lead wires 21 in the groove inner SI with respect to the radial direction in three layers, and the deviations between the winding resistance values of the respective phases can be suppressed within a permissible range.

Third embodiment.

It becomes an electric rotary machine 300 explained according to a third embodiment. In the following explanations mainly differences to the second embodiment will be explained.

In the second embodiment, the coil became 217 explained, in which the Nutinneren SI dreilagige arrangement of the lead wires 21 is changed into a single-layer arrangement in the coil end regions CE1 and CE2. How out 13 the wires become visible 21 in the coil end regions CE1 and CE2 are guided by a region which is arranged to be the same as the first layer or the third layer of the groove inner SI. In the coil end regions, no region arranged equidistantly to the second layer of the groove inner SI is used.

Therefore, in the third embodiment, a method is explained in which the lead wires are also passed through a region which is arranged in the coil end regions CE1 and CE2 equal to the second layer in the groove inner SI.

The windings of the respective phases forming coils 317 a stator winding 306 a stator 303 the electric rotary machine 300 For example, have a like in 14 shown structure. 14 shows a graphical representation of a structure of a stator winding 306 forming coil.

The spools 317 be as loop windings in the grooves 9 of the stator core 5 used so that coils of the same phase can be used close to each other. The sink 317 is as a bundle of wires 24 educated.

In particular, the spool has 317 , as in 14 is shown instead of the second curvature area 17e and the third conductor wire group 17c (please refer 2 ) a fifth conductor wire group 317h , a fourth curvature area 317j , a sixth conductor wire group 317h and a fifth curvature area 317k on.

The fifth lead wire group 317h is done by transferring the arrangement of the second conductor wire group 17b in a radial direction of the stator core 5 (n + 1) -th layer to (m - n) -th layer arrangement in the coil end region CE1 obtained. At the fifth wire group 317h are the lead wires 24 in the coil end region CE1 with respect to the radial direction of the stator core 5 arranged in the (n + 1) th layer to (m - n) -th layer.

The fourth curvature area 317j is bent so that the second conductor wire group 17b and the fifth lead wire group 317h in the coil end region CE1, enclose the angle Θ (= 360 ° - (Θ + Θ '')). This means that in one the fourth curvature area 317j comprehensive transfer area modification section 26b an arrangement (a transfer area in the radial direction) of the second line wire group 17b in the coil end region CE1 in an arrangement (a transfer region in the radial direction) of the fifth lead wire group 317h of the coil end region CE1 changes.

The sixth lead wire group 317n is done by transferring the arrangement of the fifth conductor wire group 317h in a radial direction of the stator core 5 (m - n + 1) -th position to m-th position in the coil end region CE1 obtained. At the sixth conductor wire group 317n are the lead wires 24 in the coil end region CE1 with respect to the radial direction of the stator core 5 arranged in the (m - n + 1) -th layer to m-th position.

The fifth curvature area 317k is bent so that the fifth lead wire group 317h and the sixth conductor wire group 317n enclose in the coil end region CE1 the angle Θ '(= 360 ° - (Θ + Θ'')). This means that in one the fifth curvature area 317k comprehensive transfer area modification section 26a an arrangement (a passage area in the radial direction) of the fifth conductor wire group 317h in the coil end region CE1 into an arrangement (a passage area in the radial direction) of the sixth lead wire group 317n of the coil end region CE1 changes. The number of layers m and n satisfy the following formula 7: n / m ≤ 1/3 formula 7

The sink 317 from 14 is inside the groove SI, for example, from three layers of lead wires 24 (in the radial direction of the stator core 5 arranged) five pieces (in the circumferential direction of the stator core 5 arranged). The number in radial The direction and the number in the circumferential direction can be determined, for example, as explained below.

In a like in 14 case shown changes with a coil 317 a winding arrangement, for example, from the groove inner SI to the coil end region CE1 (an arrangement change portion 39d , which is the first curvature area 17d comprises). As a result, the inside of the groove SI becomes (in the radial direction of the stator core 5 ) three layers á (in the circumferential direction of the stator core 5 ) five pieces arranged bundles of wires 24 in the coil end region CE1 in (in the radial direction of the stator core 5 ) a layer of lead wires 24 á (in the circumferential direction of the stator core 5 ) arranged fifteen pieces. At this point are the wires 24 by an angle Θ (in 14 z. B. 90 °) bent.

Subsequently, for example, in the coil end region CE1, the arrangement of the stator core in the radial direction with respect to the radial direction 5 first layer arranged conductor wires 24 (At the fourth curvature area 317j comprehensive overhead area change section 26b ), for example, with respect to the radial direction of the stator core 5 second layer so that it does not interfere with windings of other phases (the coils 317 other phases) comes. Also at this point are the wires 24 before and after the transfer of the arrangement, ie at the fourth curvature area 317j to get the angle Θ '(in 14 z. B. 180 °) bent.

Further, the arrangement becomes that with respect to the radial direction of the stator core 5 arranged in the second layer of lead wires 24 (at which the fifth curvature section 317k comprehensive transfer area modification section 26a ) in the radial direction of the stator core 5 transferred to the third position. Also at this point are the wires 24 before and after the transfer of the arrangement, ie at the fifth curvature area 317k around the angle Θ '(in 14 z. B. 180 °) bent.

During the subsequent transition of the lead wires 24 from the coil end region CE1 to the groove inner SI, the winding arrangement changes (at the third curvature region 17g comprehensive arrangement change section 39a ). Consequently, in the coil end region CE1, in (in the radial direction of the stator core 5 ) of a layer with (in the circumferential direction of the stator core 5 ) Fifteen pieces arranged bundles of wires 24 inside the groove SI in (in the radial direction of the stator core 5 ) three layers of lead wires 24 á (in the circumferential direction of the stator core 5 ) arranged five pieces. Also at this point are the wires 24 at an angle Θ '' (in 14 z. B. 90 °) bent.

In a construction of the coil as stated above 317 the coil has a triangular shape in the coil end region CE1. Although this has not been done, the change in the arrangement of the lead wires 24 in the lower half of the coil 317 made in the same way. The sink 317 has an overall square shape including the square shape of the coil end portion CE1, a square shape of the groove inner SI and a square shape of the coil end portion CE2.

With reference to the 15 to 17 becomes a changing portion of the winding arrangement of the coil 317 explained in more detail. 15 shows a plan view of the stator core 5 (Viewing direction from the rotation axis RA) in a state with in the stator core 5 inserted coil 317 , 16 shows a view from below of the stator core 5 in a state with in the stator core 5 inserted coil 317 , 17 shows a side view of the stator core 5 (Viewing direction from the rotation axis RA facing surface) in a state with in the stator core 5 inserted coil 317 ,

The 15 to 17 illustrate a state in which in the groove inside SI a coil 317 is inserted, the (in the radial direction of the stator core 5 ) three layers of lead wires á (in the circumferential direction of the stator core 5 ) has two pieces. Like the wires 24 in this case, to form the coil 317 is below using positions 25a to 25z vividly executed.

At the coil 317 begins the winding of the conductor wire 24 near the middle between the two grooves 9a and 9b (at the position 25a ) and approaches the groove 9a after passing through the region CE1b, which is arranged in the coil end region CE1 equal to the first layer in the groove inner SI. Along the way, at a point where the conductor wire 24 the space between the groove 9a and the groove 9b divided equally by three, the arrangement of the conductor wire changes 24 (at the transfer area changing section 26a ) to be guided in the coil end region CE1 through the region CE1a, which is arranged to be equal to the first layer in the groove inner SI. When looking at this area from the side, the lead wire is 24 bent by the angle Θ '(eg 180 °) (see 17 and 18 ).

Thereafter, the arrangement of the conductor wire changes 24 (at the arrangement change section 39a ) to at the position 25b (please refer 15 ) into the third position in the groove inner SI. When looking at this area from the side, the lead wire is 24 bent by the angle Θ '' (eg 180 °) (see 17 and 18 ).

The arrangement of the guided through the Nutinnere SI conductor wire 24 changes (at the arrangement change section 39b ) when leaving the position 25c (please refer 16 ), the conductor wire 24 in the region CE2a, which is arranged in the coil end region CE2 equal to the first position in the groove inner SI (see 14 ). When looking at this area from the side, the lead wire is 24 bent by the angle Θ (eg 90 °) (see 17 and 18 ).

The conductor wire 24 runs to the groove 9b on the opposite side. If the conductor wire arrives 24 to a point where the conductor wire 24 the space between the groove 9a and the groove 9b divided equally by three, the arrangement of the conductor wire changes 24 (at the transfer area changing section 26d ) so that it is guided through the region CE2b, which lies in the coil end region CE2 equal to the second layer in the groove inner SI (see 2 ). When looking at this area from the side, the lead wire is 24 bent by the angle Θ '(eg 180 °) (see 17 and 18 ).

If the conductor wire arrives 24 to another position, which is in front of the above position where the lead wire 24 the space between the groove 9a and the groove 9b divided equally by three, then changes the arrangement of the conductor wire 24 (at the transfer area changing section 26c ) so that it is guided through the region CE2c, which is now arranged in the coil end region CE2 equal to the third layer in the groove inner SI (see 14 ). When looking at this area from the side, the lead wire is 24 bent by the angle Θ '(eg 180 °) (see 17 and 18 ).

When approaching the conductor wire 24 to the groove 9b changes the arrangement of the conductor wire 24 (at the arrangement change section 39c ) so that he is at the position 25d flows into the first position in the groove inner SI. When viewing this area from the side, the lead wire is bent by the angle Θ '' (eg 90 °) (see 17 and 18 ).

The arrangement of the guided through the Nutinnere SI conductor wire 24 changes (at the arrangement change section 39d ) when leaving the position 25e , wherein the conductor wire 24 in a region CE1c, which is arranged in the coil end region CE1 equal to the third layer in the groove inner SI (see 14 ). When looking at this area from the side, the lead wire is 24 bent by the angle Θ (eg 90 °) (see 17 and 18 ).

The conductor wire 24 runs to the groove 9a on the opposite side. If the conductor wire arrives 24 to a point where the conductor wire 24 the space between the groove 9a and the groove 9b divided equally by three, the arrangement of the conductor wire changes 24 (at the transfer area changing section 26b ) so that it is guided through the region CE1b, which in the coil end region CE1 is again equal to the second layer of the groove inner SI (see 14 ). When looking at this area from the side, the lead wire is 24 bent by the angle Θ '(eg 180 °) (see 17 and 18 ).

If the conductor wire arrives 24 further to another position, which is in front of the above position, at which the lead wire 24 the space between the groove 9a and the groove 9b divided equally by three, then changes the arrangement of the conductor wire 24 (at the transfer area changing section 26a ) so that it is guided through the region CE1a, which is now arranged in the coil end region CE1 equal to the first layer in the groove inner SI (see 14 ). When looking at this area from the side, the lead wire is 24 bent by the angle Θ '(eg 180 °) (see 17 and 18 ).

The the coil 317 forming conductor wire 24 is once wound as explained above. Subsequently, the conductor wire 24 in the same way in the sequence of the position 25f , the position 25g , the position 25h , ..., the position 25x and the position 25y wound. It should be noted that in the side view of the coil end portions CE1 and CE2 six lead wires 24 are arranged side by side. The conducting wire is at the second winding and the third winding of the conducting wire is at 17 shown more towards the inside.

In the first winding, second winding, fourth winding and fifth winding of the conductor wire 24 the change of the arrangement takes place at the arrangement change sections 39a to 39d each at the entrance of the conductor wire 24 into the groove interior SI or at the exit of the conductor wire 24 from inside the groove SI. At the third winding and sixth winding of the conductor wire 24 However, there is no order change in and of itself.

18 shows a graphical representation for explaining the bending angle of the coil 317 forming wires 24 , As previously explained, the spool 317 when viewed from the side (in a direction perpendicular to the axis of rotation RA) has a square shape. This is the coil 317 in the arrangement change sections are bent by the angles Θ and Θ '' (eg 90 °). The transfer area change sections 26a and 26b are bent by an angle Θ '(= 360 ° - (Θ + Θ''), eg, if Θ = Θ''= 90 °, 180 °). A bend in the transfer area change sections 26a and 26b for example, the angle Θ '= 180 ° can also be considered that with respect to the direction perpendicular to the axis of rotation RA substantially there is no bend. It should be noted that the transfer area changing sections 26a and 26b when viewed from the direction of the axis of rotation RA can be crank-shaped (see 15 and 16 ).

19 shows a graphical representation of the winding arrangement of each phase of the stator, in the stator core 5 the spools 317 for the formation of the stator winding 306 the electric rotary machine 300 are used. Coils of the same phase are in 19 used in two grooves, since the number of slots per pole and phase is equal to 2 (eight poles, forty-eight slots). The spools 317 are in the form of a loop winding in grooves spaced by four grooves 9 of the stator core 5 used to allow the coils 317 same phase can be arranged close to each other. It should be noted that the in 19 shown stator core 5 for ease of explanation in a rectilinear form and one half of the stator core 5 partly omitted.

For example, a V-phase winding V8 includes the coil 317 By moving the coil 317 the winding U8 of the U phase in the in 19 right direction is obtained by two grooves along the circumferential direction. The winding W8 of the W phase includes, for example, the coil 317 By moving the coil 317 the winding V8 of the V-phase in the in 19 right direction is obtained by two grooves along the circumferential direction. That means that when you're in 19 the right end of the coils 317 Consider the arrangement pattern of the coils distributed with an offset of two slots 317 of U-phase, V-phase and W-phase repeated in a cycle of six grooves. Each of the coils 317 extends in the coil end regions over six grooves. Each of the coils 317 in the first layer covers the left two and in the third position the right two grooves.

As explained above, in the third embodiment, the second conductive wire group is used 17b each of the windings of each phase of the stator winding 306 forming coil 317 in the coil end region CE1 by transferring the arrangement of the first line wire group 17a with respect to the radial direction of the stator core 5n Layers (n is an integer greater than or equal to 1) are obtained. The fifth lead wire group 317h is set in the coil end region CE1 by transferring the arrangement of the second lead wire group 17b in the respect to the radial direction of the stator core 5 is disposed first layer to n-th layer, in relation to the radial direction of the stator core 5 (n + 1) -th layer obtained to (m - n) -th layer. The fourth curvature area 317j is bent so that the second conductor wire group 17b and the fifth lead wire group 317h in the coil end region CE1, enclose the angle Θ 'equal to or less than 180 ° (eg, approximately 180 °). The sixth lead wire group 317n is set in the coil end region CE1 by transferring the arrangement of the fifth lead wire group 317 in the respect to the radial direction of the stator core 5 (n + 1) -th layer to (m - n) -th layer is arranged, with respect to the radial direction of the stator core 5 (m - n + 1) -th layer obtained to m-th layer. The fifth curvature area 317k is bent so that the fifth lead wire group 317h and the sixth conductor wire group 317n in the coil end region CE1, enclose the angle Θ 'equal to or less than 180 ° (eg, approximately 180 °). The number of layers m and n suffices n / m ≤ 1/3. Therefore, for example, the windings when the coils 317 the U phase, the V phase and the W phase as in 19 shown distributed in the two-slot spacing, be formed so that the area of the two left-hand grooves in the first layer, the area of the two middle grooves in the second layer and the area of the two right-hand grooves in the third layer of the coils 317 happen. Therefore, the coils interfere with each other 317 the respective phases to a lesser extent. Therefore, the angles Θ and Θ '' for the bending of the lead wires 24 from the groove inner SI to the coil end regions CE1 and CE2 are set to 90 °. Accordingly, the coil can be formed on the coil end portions CE1 and CE2 in a square shape. This can change the height of the coil 317 in the direction along the axis of rotation RA (see 17 and 18 ) are further reduced. Thus, the stator winding can be arranged more effectively (ie packed very tightly).

Fourth embodiment.

It becomes an electric rotary machine 400 explained according to a fourth embodiment. The following explanations mainly explain differences from the first embodiment.

In the first embodiment, the coil in which the two-layer arrangement of the lead wires with respect to the radial direction in the groove inner SI is changed to a single-layer arrangement with respect to the radial direction in the coil end regions CE1 and CE2 has been illustratively explained. In the fourth embodiment, a coil is exemplified, in which the with respect to the radial direction in the groove inside SI five-layered arrangement of the lead wires in the coil end regions CE1 and CE2 is changed into a two-layer arrangement.

The formation of each of the coils forming the windings of the respective phases 417 a stator winding 406 a stator 403 the electric rotary machine 400 differs from the embodiment of the first embodiment, as from the 20 to 221, specifically in the points set out below. 20 shows one Top view on the stator core 5 in a state where the coil 417 in the stator core 5 is used. 21 shows a view from below of the stator core 5 in the stator core 5 inserted coil 417 , 22 FIG. 10 shows a side view of the stator core (viewed from the surface facing the rotation axis RA). FIG 5 in a state where the coil 417 in the stator core 5 is introduced.

The 20 to 22 show a condition in which a coil 417 is inserted in the groove inside SI (in the radial direction of the stator core 5 ) five layers of lead wires 31 á (in the circumferential direction of the stator core 5 ) has two pieces. Like the wires 31 for the formation of the coil 417 is below using position characters 32a to 32z as well as position signs 33a to 33p vividly executed.

At the coil 417 begins the winding of the conductor wire 31 near the middle between the two grooves 9a and 9b (at the position 32a ) and approaches the groove 9a after passing through the region CE1a, which is arranged in the coil end region CE1 equal to the first layer of the groove inner SI (see 2 ). Then the arrangement of the conductor wire 31 (at the arrangement change section 30a ) changed to at the position 32b to enter the fifth position of the groove inner SI. When looking at this area from the side, the lead wire is 21 bent by the angle Θ '' (see 22 and 23 ).

The arrangement of the guided through the Nutinnere SI conductor wire 31 changes (at the arrangement change section 30b ) when leaving the position 32c (please refer 21 ), the conductor wire 31 in the region CE2a, which is arranged in the coil end region CE2 equal to the first position in the groove inner SI (see 2 ). When viewing this area from the side, the lead wire is bent by the angle Θ (see 22 and 23 ).

The conductor wire 31 runs to the groove 9b on the opposite side. When approaching the conductor wire 31 to the middle between the groove 9a and groove 9b (at the transfer area changing section 34b ) changes the arrangement of the conductor wire 31 to pass through a region CE2d which is now equal to the fourth layer in the groove inner SI in the coil end region CE2 (see FIG 2 ). When viewing this area from the side, the lead wire is bent by the angle Θ '(see 22 and 23 ).

When approaching the conductor wire 31 to the groove 9b changes (at the arrangement change section 30c ) the arrangement of the conductor wire 31 so that he is at the position 32d flows into the first position in the groove inner SI. When viewing this area from the side, the lead wire is bent by the angle Θ '' (see 22 and 23 ).

The arrangement of the guided through the Nutinnere SI conductor wire 31 changes (at the arrangement change section 30d ) when leaving the position 32e (please refer 20 ), the conductor wire 31 emerges in a region CE1d, which is arranged gleichauf to the fourth layer in the groove inner SI. When looking at this area from the side, the lead wire is 31 bent by the angle Θ (see 22 and 23 ).

The conductor wire 31 runs to the groove 9a on the opposite side. When approaching the conductor wire 31 to the middle between the groove 9a and groove 9b changes (at the transfer area changing section 23a ) the arrangement of the conductor wire 31 in order to again pass through the region CE1a, which is equal to the first layer in the groove inner SI. When looking at this area from the side, the lead wire is 31 bent by the angle Θ '(see 22 and 23 ).

The the coil 417 forming conductor wire 31 is once wound as explained above. Subsequently, the conductor wire 31 in the same way in the sequence of the position 32f , the position 32g , the position 32h , ..., the position 32t and the position 32u wound. Up to this position is the lead wire 31 in the coil end regions CE1 and CE2 are guided by the regions CE1a and CE2a, respectively, which are arranged to be equal to the first layer inside the groove SI, and the regions CE1d and CE2d, respectively, which are arranged in the same direction as the fourth layer inside the groove SI. When viewed from the side, five lead wires are arranged side by side in the coil end regions CE1 and CE2. How out 22 it can be seen that the conductor wire is arranged more toward the inside in the case of the second winding and the third winding of the conductor wire.

In the first winding, second winding, third winding and fourth winding of the conductor wire 31 the change of the arrangement takes place at the arrangement change sections 30a to 30d each at the entrance of the conductor wire 31 into the groove interior SI or at the exit of the conductor wire 31 from inside the groove SI. At the fifth winding of the conductor wire 31 However, there is no order change in and of itself.

Subsequently, the at the position 32u (please refer 20 ) leaking wire 31 through the same to the fourth position in Nutinneren SI arranged area CE1d and to the groove 9a guided on the opposite side. When approaching the conductor wire 31 to the middle between the groove 9a and groove 9b changes (at the transfer area changing section 34a ) the arrangement of the lead wire 31 to now pass through a region CE1b, which is arranged gleichauf to the second layer in the groove inner SI. When looking at this area from the side, the lead wire is 31 bent by the angle Θ '(see 22 and 23 ).

When approaching the conductor wire 31 to the groove 9a (at the arrangement change section 30a ) changes the arrangement of the conductor wire 31 so that he is at the position 32v opens into the fifth position in the groove inner SI. When looking at this area from the side, the lead wire is 31 bent by the angle Θ '' (see 22 and 23 ).

The arrangement of the guided through the Nutinnere SI conductor wire 31 changes (at the arrangement change section 30b ) when leaving the position 32w (please refer 21 ), the conductor wire 31 enters a region CE2b which is arranged identically to the second layer in the groove inner SI. When looking at this area from the side, the lead wire is 31 bent by the angle Θ (see 22 and 23 ).

The conductor wire 31 runs to the groove 9b on the opposite side. When approaching the conductor wire 31 to the middle between the groove 9a and groove 9b changes (at the transfer area changing section 34b ) the arrangement of the conductor wire 31 to again pass through the region CE2a, which is equal to the fifth layer in the groove inner SI. When looking at this area from the side, the lead wire is 31 bent by the angle Θ '(see 22 and 23 ).

When approaching the conductor wire 31 to the groove 9b changes (at the arrangement change section 30c ) the arrangement of the conductor wire 31 so that he is at the position 32x flows into the first position of the groove inner SI. When looking at this area from the side, the lead wire is 31 bent by the angle Θ '' (see 22 and 23 ).

The arrangement of the guided through the Nutinnere SI conductor wire 31 changes (at the arrangement change section 30d ) when leaving the position 32y (please refer 20 ), the conductor wire 31 enters a region CE1e, which is arranged to be the same as the fifth layer in the groove inner SI. When looking at this area from the side, the lead wire is 31 bent by the angle Θ (see 22 and 23 ).

The conductor wire 31 runs to the groove 9a on the opposite side. When approaching the conductor wire 31 to the middle between the groove 9a and groove 9b changes (at the transfer area changing section 34a ) the arrangement of the conductor wire 31 to again pass through the area CE1b, which is equal to the second position of the groove inner SI. When looking at this area from the side, the lead wire is 31 bent by the angle Θ '(see 22 and 23 ).

The the coil 417 forming conductor wire 31 is once wound as explained above. Subsequently, the conductor wire 31 in the same way in the sequence of the position 32z , the position 33a , the position 33b , the position 33c , ..., the position 33n and the position 33o wound. Up to this position is the lead wire 31 in the coil end regions CE1 and CE2 through the regions CE1b and CE2b, respectively, which are arranged in the same direction as the second layer inside the groove SI, and the regions CE1e and CE2e, respectively, which are arranged in the same direction as the fifth layer inside the groove SI. When viewed from the side, five lead wires are arranged side by side in the coil end regions. How out 22 the conductor wire is visible 31 at the second winding and the third winding of the conductor wire 31 arranged more towards the inside.

In the first winding, the second winding, the third winding and the fourth winding of the conductor wire, the change of the arrangement is made to the arrangement change sections 30a to 30d each at the entrance of the conductor wire 31 in the Nutinnere or at the outlet of the conductor wire 31 from the groove inside. At the fifth winding of the conductor wire 31 However, there is no order change in and of itself.

23 shows a graphical representation for explaining the bending angle of the coil 417 forming wires 31 ,

The bending angle Θ "at the arrangement changing section 30a For example, it represents an angle that is different from the running direction DR17c of the third conductive wire group 17c and the extending direction DR17f of the fourth line wire group 17f is formed, wherein the angle to the inside of the coil 217 is directed. The sink 417 has a hexagonal shape when viewed from the side. Therefore, the angle Θ "satisfies, for example, the condition of the above formula 2. The angle Θ" satisfying the formula 2 is, for example, 120 °.

The curvature angle Θ at the arrangement change section 30d represents, for example an angle, that of the course direction DR17a of the first line wire group 17a and the direction DR17b of the second line wire group 17b is formed, wherein the angle to the inside of the coil 417 is directed. The angle Θ satisfies the condition of the above formula 3. The angle Θ satisfying the formula 3 is, for example, 120 °.

The curvature angle Θ 'at the transfer range changing portion 34a For example, it represents an angle that is different from the direction DR17b of the second conductive wire group 17b and the extending direction DR17c of the third line wire group 17c is formed, wherein the angle to the inside of the coil 217 is directed. The angle Θ 'satisfies the condition of the formula 4 given above.

Own the coil 217 for example, as in 22 and 23 shown symmetrical shape, then the above-mentioned formula 5. The above-mentioned formula 6 is obtained by substituting formula 5 in formula 4.

24 shows a graphical representation of the winding arrangement of each phase of the stator, in the stator core 5 the spools 417 for the formation of the stator winding 406 the electric rotary machine 400 are used. Coils of the same phase are in 24 used in two grooves, since the number of slots per pole and phase is equal to 2 (eight poles, forty-eight slots). The spools 417 are in the form of a loop winding in grooves spaced by four grooves 9 of the stator core 5 used to allow the coils 417 same phase can be arranged close to each other. It should be noted that the in 24 shown stator core 5 for ease of explanation in a rectilinear form and one half of the stator core 5 partly omitted.

The V-phase winding V8 includes, for example, the coil 417 By moving the coil 417 the winding U8 of the U phase in the in 24 right direction is obtained by two grooves along the circumferential direction. The winding W8 of the W phase includes, for example, the coil 417 By moving the coil 417 the winding V8 of the V-phase in the in 24 right direction is obtained by two grooves along the circumferential direction. That means that when you're in 24 the right end of the coils 417 Consider the arrangement pattern of the coils distributed with an offset of two slots 417 of U-phase, V-phase and W-phase repeated in a cycle of six grooves. Each of the coils 417 extends in the coil end regions over six grooves. Each of the coils 417 spans the left three grooves in the first layer and the second layer and the right three grooves in the fourth layer and the fifth layer.

As explained above, in the fourth embodiment, when the coils 417 used, the lead wires 31 in the left half of the coil end regions CE1 and CE2 in the regions CE1a, CE1b, CE2a and CE2b are summarized (see 20 and 21 ), which are arranged gleichauf to the first layer or second layer in the groove inside SI, while the lead wires 31 in the true half of the coil end regions CE1 and CE2 in the regions CE1d, CE1e, CE2d and CE2e, which are arranged in the same way as the fourth layer and fifth layer inside the groove SI, respectively. Consequently, the windings of U-phase, V-phase and W-phase hinder each other to a lesser extent. Out 24 One might get the impression that there is an area where the coils used in the U-phase, V-phase and W-phase are 417 overlap each other. The respective coils 417 However, are formed in the coil end regions CE1 and CE2 triangular. The middle areas of the coils 417 (the crank-shaped portions in the transfer range changing portions) correspond to a vertex of the triangular shape. As a result, the windings of U-phase, V-phase and W-phase hinder to a lesser extent. In this way, a stator winding may be formed whose coils have a short circumferential length without increasing the height of the coil end portions.

That is, the arrangement of the lead wires 31 (at the arrangement change sections 30a to 30d ) from the groove inner SI to the coil end regions CE1 and CE2, and the arrangement of the lead wires 31 in the coil end areas CE1 and CE2 (the transfer area changing sections 34a to 34d ) in the radial direction of the stator core 5 will be changed. Thereby, the obstruction of other phase windings by a phase winding in the coil end regions CE1 and CE2 is smaller, and the height of the coil end regions CE1 and CE2 can be reduced.

In the fourth embodiment, coils of the same shape can be used for all phases, U-phase, V-phase and W-phase. Therefore, since the efficiency of the work for producing the windings can be improved and the winding length can be made equal in each of the phases, the deviations in the winding resistance values of the respective phases can be suppressed to within an allowable range. This can reduce torque ripple and vibration.

Fifth embodiment.

It becomes an electric rotary machine 500 explained according to a fifth embodiment. In the following embodiments, the differences to the first, second and fourth embodiments will mainly be explained.

In the first, second and fourth embodiments, of the coils whose arrangement changes from the groove interior to the coil end regions, the coils whose coil end portions have a triangular shape are explained. In the fifth embodiment, a method is explained in which in each Leitdrahtwindung in the Spulenendbereichen a The transfer range changing portion is displaced in the circumferential direction of the stator core by a distance X explained below, and the transfer range changing portion is arranged so that the vertex of the triangular shape of each wire twist in the coil end portions is offset by the distance X.

Concretely, coils have 517 that at a stator winding 506 a stator 503 the electric rotary machine 500 Windings of the respective phases form, for example, an in 25 shown construction. 25 shows a graphical representation of a structure of a coil, the stator winding 506 formed.

The spools 517 be as loop windings in the slots of the stator core 5 used so that coils of the same phase can be used close to each other. The sink 517 is as a bundle of wires 41 educated.

Specifically, the coil includes 517 as in 25 shown instead of the second curvature area 17e (please refer 2 ) a second curvature area 517e ,

In the second curvature area 517e are the lead wires 41 arranged so that they are relative to the circumferential direction of the stator core 5 every turn of the wires 41 offset by the distance X. That is, at a transfer area changing section 43a that the second curvature area 517e includes, by the displacement of the lead wires 41 by the distance X relative to the circumferential direction of the stator core 5 a change of the arrangement (in the radial direction of a transfer region) of the second lead wire group 17b in the coil end region CE1 in an arrangement (in the radial direction of a transfer region) of the third lead wire group 17c takes place in the coil end region CE1. For example, when the angle Θ and the angle Θ 'coincide and the width of the lead wires is represented by W, the distance X when the above-mentioned formula 5 is satisfied is given by the following formula 8: X = W / (- cosΘ) Formula 8

The sink 517 from 25 is in the groove inside SI, for example, two layers of lead wires 41 (arranged in the radial direction of the stator core) á eight pieces (in the circumferential direction of the stator core 5 arranged). The number in the radial direction and the number in the circumferential direction can be determined, for example, as explained below.

In a like in 25 For example, a winding arrangement of the coil changes 517 from the groove inner SI to the coil end region CE1 (at the arrangement changing portion 40d ). As a result, the inside of the groove SI becomes (in the radial direction of the stator core 5 ) two layers á (in the circumferential direction of the stator core 5 ) eight pieces arranged bundles of wires 41 in the coil end region CE1 in (in the radial direction of the stator core 5 ) a layer of lead wires 41 á (in the circumferential direction of the stator core 5 ) arranged sixteen pieces. At this point are the wires 41 by an angle Θ (in 25 z. B. 135 °) bent.

Subsequently, for example, in the coil end region CE1, the arrangement of the stator core in the radial direction with respect to the radial direction 5 first layer arranged conductor wires 41 (at which the second curvature area 517e comprehensive transfer area modification section 43a ), for example, with respect to the radial direction of the stator core 5 second layer so that it does not interfere with windings of other phases (the coils 517 other phases) comes. Also at this point are the wires 41 before and after the transfer of the arrangement, ie at the second curvature area 517e around the angle Θ '(in 25 z. B. 90 °) bent.

During the subsequent transition of the lead wires 41 from the coil end portion CE1 to the groove inner SI, the winding assembly (at the arrangement change portion) changes 40a ). Consequently, in the coil end region CE1, in (in the radial direction of the stator core 5 ) of a layer with (in the circumferential direction of the stator core 5 ) Sixteen pieces of bundles of wires 41 inside the groove SI in (in the radial direction of the stator core 5 ) two layers of lead wires 41 á (in the circumferential direction of the stator core 5 ) arranged eight pieces. At this point are the wires 41 at an angle Θ '' (in 25 z. B. 135 °) bent.

In a construction of the coil as stated above 517 the coil has a triangular shape in the coil end region CE1. Although this has not been done, the change in the arrangement of the lead wires 41 in the lower half of the coil 517 made in the same way. The sink 517 has an overall hexagonal shape.

It is noted that the 25 underlying present embodiment of the 2 in the above-explained first embodiment therein, it is distinguished that in the coil end portions, a portion 49 is arranged offset to change the lead wire transfer at each turn of the lead wires by a distance X relative to the circumferential direction of the stator core. As a result, the vertex of the triangular shape of the coil end portions is offset by the distance X every one turn of the lead wires. Compared to 2 , in which the location of the Corner is aligned in the circumferential direction, the height of the coil end can be reduced.

With reference to the 26 to 28 becomes a changing portion of the winding arrangement of the coil 517 explained in more detail. 26 shows a plan view of the stator core 5 in a state where in the stator core 5 the sink 517 is used. 27 shows a view from below of the stator core 5 in a state where in the stator core 5 the sink 517 is used. 28 shows a side view of the stator core 5 (Viewing direction from the rotation axis RA facing surface) in a state in which in the stator core 5 the sink 517 is used.

The 26 to 28 illustrate a state in which in the groove inside SI a coil 517 is inserted, the (in the radial direction of the stator core 5 ) two layers of lead wires 41 á (in the circumferential direction of the stator core 5 ) has two pieces. Like the wires 41 in this case, to form the coil 517 is below using positions 42a to 42r vividly executed.

At the coil 517 begins the winding of the conductor wire 41 near the middle between the two grooves 9a and 9b (at the position 42a ) and approaches the groove 9a after passing through the region CE1a, which is arranged identically to the first layer in the groove inner SI. Thereafter, the arrangement of the conductor wire changes 41 (at the arrangement change section 40a ) to at the position 42b to open into the second position in Nutinneren SI. When looking at this area from the side, the lead wire is 41 bent by the angle Θ '' (see 28 and 29 ).

The arrangement of the guided through the Nutinnere SI conductor wire 41 changes (at the arrangement change section 40b ) when leaving the position 42c (please refer 27 ), the conductor wire 41 emerges in a region CE2a, which is arranged gleichauf to the first layer in the groove inner SI. When looking at this area from the side, the lead wire is 41 bent by the angle Θ (see 28 and 29 ).

The conductor wire 41 runs to the groove 9b on the opposite side. When approaching the conductor wire 41 to the middle between the groove 9a and groove 9b changes (at the transfer area changing section 13b ) the arrangement of the conductor wire 41 to pass through a region CE2b which is now equal to the second layer in the groove inner SI. When looking at this area from the side, the lead wire is 41 bent by the angle Θ '(see 28 and 29 ).

When approaching the conductor wire 41 to the groove 9b changes (at the arrangement change section 40c ) the arrangement of the conductor wire 41 so that he is at the position 42d flows into the first position in the groove inner SI. When looking at this area from the side, the lead wire is 41 bent by the angle Θ '' (see 28 and 29 ).

The arrangement of the guided through the Nutinnere SI conductor wire 41 changes (at the arrangement change section 40d ) when leaving the position 42e , wherein the conductor wire 41 in the region CE1b, which is arranged gleichauf to the second layer in the groove inside SI. When looking at this area from the side, the lead wire is 41 bent by the angle Θ (see 28 and 29 ).

The conductor wire 41 runs to the groove 9a on the opposite side. When approaching the conductor wire 41 to the middle between the groove 9a and groove 9b changes (at the transfer area changing section 43a ) the arrangement of the conductor wire 41 again to pass through the area which is arranged on the same level as the first layer in the groove inner SI. When looking at this area from the side, the lead wire is 41 bent by a predetermined angle.

The conductor wire forming the coil 41 is once wound as explained above. After that, the lead wire becomes 41 in the same way in the sequence of the position 42f , the position 42g , the position 42h , ..., the position 42p and the position 42q wound. In the second and subsequent turns of the conductor wire 41 are the positions of the transition area change sections 43a and 43b however, with each turn of the conductor wire 41 in the circumferential direction of the stator core 5 offset by the distance X arranged. When viewed from the side, the transition region change sections form 43a and 43b the vicinity of the vertices of the coil end portions CE1 and CE2 and are formed triangular. In other words, the vertex of the conductor wire 41 in the triangular-shaped coil end portions CE1 and CE2 as in each turn of the lead wire 41 by the distance X in the circumferential direction of the stator core 5 be arranged offset.

It should be noted that, for example, in the side view of the coil end portions CE1 and CE2, four lead wires 41 are arranged side by side. As 28 to take the first turn of the conductor wire 41 always on the extreme left side of the four wires 41 arranged. At the second turn and the third turn, the lead wire is 41 more to the right side (the winding method differs from that in FIG 6 illustrated and explained in the first embodiment).

In the first turn and the third turn of the lead wire, the change of arrangement occurs when the lead wire 41 at the arrangement change sections 40a to 40d enters or exits the groove. In the second turn and fourth turn of the conductor wire, however, no arrangement change takes place.

The winding of the conductor wire 41 ends at the coil 517 finally near the middle between the two grooves 9a and 9b (at the position 42r ).

29 Fig. 12 is a graph for explaining the angles of curvature and dimensions of the lead wires constituting the coil.

The bending angle Θ "at the arrangement changing section 40a For example, it represents an angle that is different from the running direction DR17c of the third conductive wire group 17c and the extending direction DR17f of the fourth line wire group 17f is formed, wherein the angle to the inside of the coil 517 is directed. The sink 517 is formed in lateral view in a hexagonal shape. Therefore, the angle Θ "satisfies, for example, the condition of the above formula 2. An angle Θ" satisfying the formula 2 is, for example, 135 °.

The curvature angle Θ at the arrangement change section 40d For example, it represents an angle that is different from the direction of travel DR17a of the first conductive wire group 17a and the direction DR17b of the second line wire group 17b is formed, wherein the angle to the inside of the coil 517 is directed. The angle Θ satisfies the condition of the above formula 3. An angle Θ satisfying the formula 3 is, for example, 135 °.

The curvature angle Θ 'at the transfer range changing portion 43a For example, it represents an angle that is different from the direction DR17b of the second conductive wire group 17b and the extending direction DR17c of the third line wire group 17c is formed, wherein the angle to the inside of the coil 517 is directed. The angle Θ 'satisfies the condition of the formula 4 given above.

Own the coil 517 for example, as in the 28 and 29 shown symmetrical shape, then the formula given above 5 applies. By inserting formula 5 in formula 4 gives the formula given above 6.

The position of the transfer area change section 43a is at every turn of the conductor wire 41 by the distance X in the circumferential direction of the stator core 5 staggered. When the width of the lead wire is represented by W and the curvature angle of the arrangement change range is represented by Θ (when the above-mentioned formula 5 is satisfied), the distance X is obtainable through the above-mentioned formula 8.

30 shows a graphical representation of the winding arrangement of each phase of the stator 503 in its stator core 5 the spools 517 for the formation of the stator winding 506 the electric rotary machine 500 are used. Do the washing up 517 same phase are in 30 used in two grooves, since the number of slots per pole and phase is equal to 2 (eight poles, forty-eight slots). The spools 517 are in the form of a loop winding in grooves spaced by four slots of the stator core 5 used so that coils of the same phase can be arranged close to each other. It should be noted that the in 30 shown stator core 5 for ease of explanation in a rectilinear form and one half of the stator core 5 partly omitted.

The V-phase winding V8 includes, for example, the coil 517 By moving the coil 517 the winding U8 of the U phase in the in 30 right direction is obtained by two grooves along the circumferential direction. The winding W8 of the W phase includes, for example, the coil 517 By moving the coil 517 the winding V8 of the V-phase in the in 30 right direction is obtained by two grooves along the circumferential direction. That means that when you're in 30 the right end of the coils 517 Consider the arrangement pattern of the coils distributed with an offset of two slots 517 of U-phase, V-phase and W-phase repeated in a cycle of six grooves. Each of the coils 517 extends in the coil end regions over six grooves. Each of the coils 517 spans the left three grooves in the first layer and the right three grooves in the second layer.

As explained above, in the fifth embodiment, the transfer area changing section 43a in the coil end regions CE1 and CE2, the arrangement of the conductor wire 41 in the radial direction of the stator core 5 changes, with each turn of the conductor wire 41 by the distance X in the circumferential direction of the stator core 5 staggered. Concretely, when the width of the conductor wire is represented by W and the curvature angle of the arrangement change range is represented by Θ (when the above-mentioned formula 5 is satisfied), the lead-out region changing portion for the lead wire 41 with an offset by the distance X given by the formula 8 (see 26 and 27 ). This can change the height of the coil 517 be further reduced in the coil end regions CE1 and CE2.

Sixth embodiment.

It becomes an electric rotary machine 600 explained according to a sixth embodiment. In the following embodiments, the differences to the first to fifth embodiments will mainly be explained.

In the first to fifth embodiments, only one example of a method of realizing a coil will be explained, in which the arrangement of the lead wires inside the groove differs from that in the coil end regions, and the coil need not always be formed according to this process.

Therefore, in the sixth embodiment, a process of forming a coil different from that described above will be explained.

Specifically, each of the coils differs 617 that at a stator winding 606 a stator 603 the electric rotary machine 600 Windings of the respective phases form, from the configurations of the first to fifth embodiment, as from 31 to 33 is apparent, in the points explained below. 31 shows a plan view of the stator core 5 in a state where the coil 617 in the stator core 5 is used. 32 is a bottom view of the stator core 5 in a state where the coil 617 in the stator core 5 is used. 33 is a side view of the stator core 5 (viewed from the surface facing the rotation axis RA) in a state where the coil 617 in the stator core 5 is used.

The 31 to 33 show a condition in which a coil 617 is inserted in the groove inside SI (in the radial direction of the stator core 5 ) two layers of lead wires 81 á (in the circumferential direction of the stator core 5 ) has two pieces. Like the lead wires to form the coil 617 Wrapped in this case is below using position characters 82a to 82r vividly executed.

At the coil 617 begins the winding of the conductor wire 81 near the middle between the two grooves 9a and 9b (at the position 82a ) and approaches the groove 9a after passing through the region CE1a, which is arranged identically to the first layer in the groove inner SI. Then the arrangement of the conductor wire 81 (at the arrangement change section 80a ) changed to at the position 82b to enter the second position inside the groove SI. When looking at this area from the side, the lead wire is 81 bent by the angle Θ '' (see 33 ).

The arrangement of the guided through the Nutinnere SI conductor wire 81 changes (at the arrangement change section 80b ) when leaving the position 82c (please refer 32 ), the conductor wire 81 emerges in a region CE2a, which is arranged gleichauf to the first layer in the groove inner SI. When looking at this area from the side, the lead wire is 81 bent by the angle Θ (see 33 ).

The conductor wire 81 runs to the groove 9b on the opposite side. When approaching the conductor wire 81 to the middle between the groove 9a and groove 9b changes (at the transfer area changing section 83b ) the arrangement of the conductor wire 81 to now pass through a region CE2b, which is equal to the second layer in the groove inner SI. When looking at this area from the side, the lead wire is 81 bent by the angle Θ '(see 33 ).

When approaching the conductor wire 81 to the groove 9b changes (at the arrangement change section 80c ) the arrangement of the conductor wire 81 so that he is at the position 82d flows into the first position in the groove inner SI. When looking at this area from the side, the lead wire is 81 bent by the angle Θ '' (see 33 ).

The arrangement of the guided through the Nutinnere SI conductor wire 81 changes (at the arrangement change section 80d ) when leaving the position 82e (please refer 31 ), the conductor wire 81 exits in a region CE1b, which is arranged gleichauf to the second layer in the groove inside SI. When looking at this area from the side, the lead wire is 81 bent by the angle Θ (see 33 ).

The conductor wire 81 runs to the groove 9a on the opposite side. When approaching the conductor wire 81 to the middle between the groove 9a and groove 9b changes (at the transfer area changing section 83a ) the arrangement of the conductor wire 81 in order to again pass through the region CE1a, which is arranged identically to the first layer in the groove inner SI. When looking at this area from the side, the lead wire is 81 bent by the angle Θ '(see 33 ).

The the coil 617 forming conductor wire 81 is once wound as explained above. Subsequently, the conductor wire 81 in the same way in the sequence of the position 82f , the position 82g , the position 82h , ..., the position 82p and the position 82q wound. It should be noted that, in the side view of the coil end portions CE1 and CE2, four lead wires 81 are arranged side by side. As in 33 As shown, the lead wire is disposed toward the inside at the second turn and the third turn of the lead wire.

In the method of forming a coil according to the first embodiment, the change in the arrangement is made at the first turn and the second turn of the lead wire at the arrangement change sections 10a to 10d each at the entrance of the conductor wire 11 into the groove interior SI or at the exit of the conductor wire 11 from inside the groove SI. At the second turn and fourth turn of the conductor wire 11 there is no change of arrangement per se (see 4 to 6 ).

On the other hand, in the sixth embodiment, the arrangement is changed in the method of forming a coil 617 at the first turn and the second turn of the conductor wire at the arrangement change sections 80a to 80d in each case upon entry of the conductor wire into the groove interior or at the outlet of the conductor wire from the groove interior. In the third turn and fourth turn of the conductor wire (if, for example, from a region which is arranged gleichauf to the first layer inside the groove, emerging lead wire enters directly into the first position in the groove inside) takes place, however, no arrangement change. In the present embodiment, the arrangement change occurs every turn of the lead wire 81 continuous either actually or not. This aligns a bend (a right angle crank shape) with the layout change. Thus, the arrangement change portions of the coil end portions can be made more compact.

As explained above, the change in the arrangement in the sixth embodiment is either continuous or not at every turn of the lead wire. This aligns a bend (a right angle crank shape) with the layout change. Thus, the arrangement change portions of the coil end portions can be made more compact.

It should be noted that the sixth embodiment was explained in comparison with the first embodiment. However, the same technology can be used also in the second to fifth embodiments. The technology of the sixth embodiment can also be applied to the seventh embodiment explained below.

Seventh embodiment.

It becomes an electric rotary machine 700 explained according to a seventh embodiment. In the following embodiments, mainly the differences from the first to fifth embodiments will be explained.

In the first to fifth embodiments, only one example of a method of realizing a coil will be explained, in which the arrangement of the lead wires in the groove inside is different from that in the coil end portions. The coil does not always have to be formed according to this procedure.

Therefore, in the seventh embodiment, a process of forming a coil different from those described in the first to fifth embodiments will be explained.

Specifically, the configuration of each of the coils differs 717 that at a stator winding 706 a stator 703 the electric rotary machine 700 Windings of the respective phases, of the configuration of the first embodiment, as from 34 to 36 is apparent, in the points explained below. 34 shows a plan view of the stator core 5 in a state where the coil 717 in the stator core 5 is used. 35 is a bottom view of the stator core 5 in a state where the coil 717 in the stator core 5 is used. 36 is a side view of the stator core 5 in a state where the coil 717 in the stator core 5 is used.

The 34 to 36 show a condition in which a coil 717 is inserted in the groove inside SI (in the radial direction of the stator core 5 ) two layers of lead wires 91 á (in the circumferential direction of the stator core 5 ) has two pieces. Like the lead wires to form the coil 717 Wrapped in this case is below using position characters 92a to 92r vividly executed.

At the coil 717 begins the winding of the conductor wire 91 near the middle between the two grooves 9a and 9b (at the position 92a ) and approaches the groove 9a after passing through the region CE1a, which is arranged identically to the first layer in the groove inner SI. Then the arrangement of the conductor wire 91 (at the arrangement change section 90a ) changed to at the position 92b to enter the second position inside the groove SI. When looking at this area from the side, the lead wire is 91 bent by the angle Θ '' (see 36 ).

The arrangement of the guided through the Nutinnere SI conductor wire 91 changes (at the arrangement change section 90b ) when leaving the position 92c (please refer 35 ), the conductor wire 91 emerges in a region CE2a, which is arranged gleichauf to the first layer in the groove inner SI. When looking at this area from the side, the lead wire is 91 bent by the angle Θ (see 36 ).

The conductor wire 91 runs to the groove 9b on the opposite side. When approaching the conductor wire 91 to the middle between the groove 9a and groove 9b changes (at the transfer area changing section 93b ) the arrangement of the conductor wire 91 to now pass through a region CE2b, which is equal to the second layer in the groove inner SI. When looking at this area from the side, the lead wire is 91 bent by the angle Θ '(see 36 ).

When approaching the conductor wire 91 to the groove 9b changes (at the arrangement change section 90c ) the arrangement of the conductor wire 91 so that he is at the position 92d flows into the first position in the groove inner SI. When looking at this area from the side, the lead wire is 91 bent by the angle Θ '' (see 36 ).

The arrangement of the guided through the Nutinnere SI conductor wire 91 changes (at the arrangement change section 90d ) when leaving the position 92e (please refer 34 ), the conductor wire 91 exits in a region CE1b, which is arranged gleichauf to the second layer in the groove inside SI. When looking at this area from the side, the lead wire is 91 bent by the angle Θ (see 36 ).

The conductor wire 91 runs to the groove 9a on the opposite side. When approaching the conductor wire 91 to the middle between the groove 9a and groove 9b changes (at the transfer area changing section 93a ) the arrangement of the conductor wire 91 to again pass through the area CE1a, which is arranged to be the same as the first location in the groove inner SI. When looking at this area from the side, the lead wire is 91 bent by the angle Θ '.

The the coil 717 forming conductor wire 91 is once wound as explained above. Subsequently, the conductor wire 91 in the same way in the sequence of the position 92f , the position 92g , the position 92h , ..., the position 92p and the position 92q wound. It should be noted that, in the side view of the coil end portions CE1 and CE2, four lead wires 91 are arranged side by side.

In the first embodiment, the lead wire is 11 at the second turn and the third turn of the conductor wire 11 , as in 6 is shown, arranged more towards the inside. Therefore, are located at the coil 17 the winding start of the conductor wire 11 in the upper part and the winding end of the conductor wire 11 in the lower part.

In the present embodiment, the lead wire is 91 like out 36 on the other hand visible at the second turn and the third turn of the conductor wire 91 arranged more towards the outside. Therefore, are located at the coil 717 the winding start of the conductor wire 91 in the lower part and the winding end of the conductor wire 91 in the upper part.

Although a method is explained in detail below, the stator winding becomes 706 by arranging the plurality of coils 717 inside the groove SI and connecting the ends of the coils 717 formed using a method such as welding. As coils 717 several coils of the same shape can be used.

In the first embodiment, for example, in the experiment, the in 6 shown coils 17 to connect, a slightly longer connecting line for the coils 17 needed, since the winding start of the wire 11 in the upper part and the winding end of the conductor wire 11 located in the lower part.

On the other hand, in the present embodiment, when two types of coils, ie, those in FIG 6 shown coil 17 and the in 36 shown coil 717 , manufactured and used alternately, then are the winding start of the conductor wire 11 in the upper part and the winding end of the conductor wire 11 in the lower part of the in 6 shown coil 17 while the winding start of the conductor wire 91 in the lower part and the winding end of the conductor wire 91 in the upper part of the in 36 shown coil 717 located. Therefore, the coil can 17 and the coil 717 using a short connection line (eg at the shortest distance).

As explained above, the seventh embodiment, in which two kinds of coils wound by different methods are used simultaneously in connecting a plurality of coils, enables connecting the coils using a short connection line (eg, the shortest distance).

It should be noted that the seventh embodiment has been described in comparison with the first embodiment. However, the same technology can be used in the second to sixth embodiments as well.

It should be noted that the coils in the first, second and fourth embodiments have a hexagonal shape as seen from the side as explained. The conditions involved in realizing the coils, the number of layers and the angles of curvature of the lead wires are the following:
m is an integer greater than or equal to 2,
n is an integer greater than or equal to 1,
the angles of curvature Θ and Θ '' satisfy the formulas 2 and 3 and
the number of layers m and n satisfy the formula 1.

As an additional detail, when the n / m obtained from Formula 1 is at most (1/2), the lead wires can be arranged efficiently (ie, extremely tightly packed) to an extent such that there is substantially no unused space in the coil end areas in which no Lead wires are arranged, is present. As an analogous example, the radial direction of the stator core 5 two-layered lead wire arrangement in the groove inner SI in the coil end portions CE1 and CE2 as in the first embodiment explained in a radial direction with respect to the stator core 5 one-layer arrangement transferred.

On the other hand, in the second embodiment, the three-layered arrangement of lead wires in the groove inner SI in the radial direction of the stator core becomes in the coil end regions CE1 and CE2 in a radial direction of the stator core 5 one-layered arrangement) and the fourth embodiment (the five-layered arrangement of lead wires in the groove inner SI in the radial direction of the stator core becomes in the coil end regions CE1 and CE2 in a radial direction of the stator core 5 two-layered arrangement) in which the value of n / m is smaller than 1/2, in the coil end regions CE1 and CE2, there is an unused space through which no lead wires are led at all. In the formation of a stator winding of a rotary electric machine, it is desirable to form coils under the above condition (1/2). In practice, the width and height of the Nutinneren and the wire diameter of the lead wires but to a limit on the number of layers. Therefore, the coils are sometimes formed by mixing the previous condition and the latter condition (smaller than 1/2).

In the third embodiment, the coils when viewed from the side have a square shape as explained. The conditions involved in realizing the coils, the number of layers and the angles of curvature of the lead wires are the following:
m is an integer greater than or equal to 3,
n is an integer greater than or equal to 1,
both angles of curvature Θ and Θ '' are 90 ° and
the number of layers m and n satisfy the formula 7.

As an additional detail, when the n / m obtained from Formula 7 is at most (1/3), it can be efficiently (ie, extremely tightly packed) to an extent that substantially no unused space in the coil end regions CE1 and CE2, in which no wires are arranged, is present. As an analogous example, the radial direction of the stator core 5 Three-layered lead wire arrangement in the groove inner SI in the coil end portions CE1 and CE2 as in the third embodiment explains in a relation to the radial direction of the stator core 5 one-layer arrangement transferred. On the other hand, although not explained as an embodiment, at m / n smaller than 1/3 in the coil end regions CE1 and CE2, there is an unused space through which no lead wires are led at all. In the case of forming a stator winding of a rotary electric machine, ideally, it is desirable to form the coils under the above condition (1/3). In practice, the width and height of the Nutinneren and the wire diameter of the lead wires but to a limit on the number of layers. Therefore, the coils are sometimes formed by mixing the previous condition and the latter condition (smaller than 1/3).

Previously, the first to seventh embodiments have been described. However, all embodiments may be modified as below.

37 For example, it shows a top view of a stator core 5 in a state where a coil 817 in the stator core 5 is introduced. Be for the lead wires 51 as in 37 shown used round wires, then can the coil 817 forming wires 51 also be arranged in Nutinneren that they are interlocked. This is done to improve the coverage of the windings. When the wires 51 interlaced, however, the height of the coil inside the groove SI decreases accordingly.

Even if the wires 51 in the coil end regions CE1 and CE2 are interleaved, the coil can 817 as for the coil 817 Required height inside the groove SI is the same as in the coil end regions CE1 and CE2, in compliance with the condition of the formula 1 given above.

Are the wires 51 but not interlaced in the coil end regions CE1 and CE2, then only the height of the coil increases 817 in the groove inside SI accordingly. As for the coil 817 Therefore, in the groove inner SI, the required height is different from that in the coil end regions CE1 and CE2, therefore, the condition of the formula 1 is not satisfied. Assuming that in this case the height of the wires 51 in the radial direction of the stator core 5 in the groove inside SI are arranged in m layers intertwined, is equal to the height of the arranged in m 'layers in a normal layer scheme leads is the relationship between m and m 'is represented by the following formula 9: m '= 1 + √3 / 2 * (m-1) Formula 9 (m is an integer greater than or equal to 2)

At the coil 817 in which the arrangement of the wires 51 in the groove inner SI in with respect to the radial direction of the stator core 5 are arranged in m layers in the coil end regions CE1 and CE2 with respect to the radial direction of the stator core 5 is transferred in n layers, the lead wires 51 are bent from the groove inner SI to the coil end portions CE1 and CE2 by the angle Θ or Θ '', the arrangement of arranged in the coil end regions in relation to the radial direction of the stator core in the first layer to the n-th layer lead wires in the respect the radial direction of the stator core (m - n + 1) -th layer is transferred to m-th layer and the included by the thus bent wires before and after the arrangement transfer angle Θ '(= 360 ° - (Θ + Θ'')), is subject to the arrangement of Nuteineren SI intertwined wire strands 51 the following conditions:
m is an integer greater than or equal to 2,
n is an integer greater than or equal to 1,
the angles of curvature Θ and Θ '' satisfy the formulas 2 and 3 and
the number of layers m and n satisfies the formula 10. n / {1 + √3 / 2 * (m-1)} ≤1 / 2 Formula 10

This may cause the fill factor of the lead wires 51 inside the groove SI can be improved.

38 for example, shows an alternative in a top view of the stator core 5 in a state where a coil 917 in the stator core 5 is introduced. In the foregoing embodiment, an example has been explained in which the coil interior SI of the stator core 5 only one coil is inserted. However, a stator winding of a rotary electric machine is often designed so that several coils are arranged in a Nutinneren and the coils are connected. 38 shows a state in which in the groove inside SI two coils ( 917-1 and 917-2 ) are used, the (in the radial direction of the stator core 5 ) two layers of lead wires 53 to (in the circumferential direction of the stator core 5 ) each two pieces and in the coil end regions CE1 and CE2 with (in the circumferential direction of the stator core 5 ) four pieces of lead wires 53 in (in the radial direction of the stator core 5 ) have a layer. In such a case, to form a stator winding, a winding end 522 of a conductor wire 52 the first coil 917-1 and a winding start 531 of the conductor wire 53 the second coil 917-2 connected with each other. Of course, even if the number of coils to be inserted increases, by connecting (joining) a winding start of a conductor wire of a coil to a winding start of a conductor wire of the next coil, a stator winding can be formed in the groove interior with respect to the radial direction of the stator core Has layers.

39 for example, shows an alternative in a top view of the stator core 5 in a state where in the stator core 5 Do the washing up 1017 are introduced. In the case of in 1 shown stator core 5 which has a round shape, the shape of the groove is often trapezoidal rather than rectangular. This is because, to allow teeth of constant width, the width of the groove on the inner circumference of the stator core 5 smaller and on the outer circumference of the stator core 5 is larger. 39 shows a state in which in the groove inside SI of the stator core 5 three coils 1017-1 to 1017-3 are used.

At the coils 1017-1 to 1017-3 the number of turns of the wires changes 54 . 55 and 56 the coils 1017-1 to 1017-3 according to the width and height of the groove inside SI. Even if the shape of the grooves 9a and 9b is not rectangular, each groove shape can be met by the shape corresponding to several designs of coils 1017-1 to 1017-3 different number of turns of the lead wires 54 . 55 and 56 used and the coils 1017-1 to 1017-3 be joined together. It should be noted that the coils 1017-1 to 1017-3 a stator winding as stated above by connecting a winding end 542 of the conductor wire 54 the first coil 1017-1 with a winding start 551 of the conductor wire 55 the second coil 1017-2 and connect a coil end 552 of the conductor wire 55 the second coil 1017-2 with a winding start 561 of the conductor wire 56 the third coil 1017-3 is formed.

It should be noted that with reference to 38 and 39 the method for inserting the plurality of coils in the groove inner SI of the stator core 5 and connecting the winding starts to the coil ends of the coils has been explained. However, in such a case, the coils may be connected in advance with connecting wires.

As an alternative shows 40 For example, an alternative construction of a coil package for forming a stator winding in a graphical representation. In the bobbin, the coils, which are the in 2 Formed stator winding, connected in advance by connecting wires. A coil container 61 is used as a loop winding in slots of a stator core, so that coils of the same phase are used close to each other. at the bobbin container 61 are three coils, ie a coil 63a , a coil 63b and a coil 63c connected with each other. The coils are connected via connecting wires 62 connected with each other. The sink 63a , the sink 63b and the coil 63c from 40 are in the groove inside SI out (in the radial direction of the stator core 5 ) two layers of lead wires each (in the circumferential direction of the stator core 5 ) built eight pieces. However, the number in the radial direction and the number in the circumferential direction can be arbitrarily set.

As an alternative shows 41 For example, a view from the top of a stator core 5 in a state where in the stator core 5 Do the washing up 1117 are introduced. 41 shows a state with inserted bobbin 1161 , The bobbin container 1161 includes three coils 1117-1 to 1117-3 in which the lead wires 64 inside the groove SI in (in the radial direction of the stator core 5 ) two layers á (in the circumferential direction of the stator core 5 ) two pieces and the wires 64 in the coil end regions CE1 and CE2 in (in the radial direction of the stator core 5 ) of a layer with (in the circumferential direction of the stator core 5 ) four pieces are arranged. Compared to 38 need, since the coils 1117-1 to 1117-3 are connected in advance, the connection work can not be performed on each of the coils used, whereby a reduction in the applied work is achieved.

As explained in the embodiments, the positions of winding start and winding end of the coil are arbitrary. However, if the winding end of the coil is placed on a line connecting the winding start of the coil to the center of the stator core (aligning the positions of winding start and winding end with respect to the stator core circumferential direction), then if a plurality of coils in the stator core Pre-connected or joined together, the work of connecting facilitated and the length of the connecting wires can be reduced.

Especially in the case of a coil having a side view hexagonal shape, it is desirable to arrange the coil end of the coil on a line connecting the coil start of the coil to the center of the stator core, and the position of the coil end to the corner point of a triangular shaped coil end portion (the positions of the winding start and winding ends are located at the vertex of the coil end regions with respect to the circumferential direction of the stator core). Therefore, when a plurality of coils are connected or joined together in advance, the stator windings of other phases are not obstructed by a wire for connecting the coils.

40 explains the insertion of the coil forming the stator winding in the groove inside. To form the stator winding of the rotary electric machine, however, the coil packages used in all grooves must be connected. Therefore, the coil cans can be further connected to connecting wires to form a larger coil group, each corresponding to a phase of the stator winding.

42 For example, Fig. 12 is a diagram showing a structure of a coil group for forming a stator winding. For the coil group, the in 40 shown, the stator winding coil packages connected in advance by attaching connecting wires. In 42 is a coil group 71 shown in a state in which the bobbin 72a to 72h using connecting wires 73 are connected in series. In a stator winding of a rotary electric machine various structures are used, for example, a serial connection of all windings in a groove or a division of the windings of the groove in halves and parallel connection of these. In 42 All windings of the grooves are connected in series. When the bobbin bundles 72a to 72d and the bobbin containers 72e to 72h However, for example, each connected in advance by attaching connecting wires and the two connected coil packages are connected in parallel, then two parallel-connected stator windings can be obtained. By preparing the bobbin assembly by connecting the bobbins, the number of joining operations can be considerably reduced, thereby achieving a reduction in the labor cost.

The embodiments were preferably explained with a number of grooves that was 2 per pole and phase (eight poles, forty eight grooves). However, a specific restriction to a number of poles and a number of grooves is not available. The present invention may also be practiced with other combinations.

The designs were explained with round wires. However, in the present invention, there is no limitation on the cross-sectional shape of lead wires. Therefore, instead of round wires, square wires and the like can be used. It should be noted that a characteristic of square wires is that the fill factor of the coils inside the groove can be improved, but the handling is not easy on the other hand. Conversely, round wires can be handled easily, on the other hand, the filling factor of the windings inside the groove can not be improved. In order to take advantage of both square and round wires, there is a method whereby coils are made with easy-to-handle round wires and only the lead wires to be received inside the groove are pressed and reshaped to improve the fill factor , assume an approximately square cross-sectional shape.

However, the height of the coil inside the groove becomes comparatively small if only the cross-sectional shape of the lead wires to be accommodated in the groove interior is brought into an approximately square cross-sectional shape. Although the cross-sectional shape of the lead wires in the coil end portions is made into an approximately square shape, the height required for the coil in the groove inner corresponds to that in the coil end portions. Therefore, the coil can be always molded in compliance with the condition of the above-mentioned formula 1. However, if the cross-sectional shape of the lead wires of the coil end portions is not made into an approximately square shape, then only the height of the coil inside the groove is comparatively small. Therefore, the height required for the coil inside the groove differs from that in the coil end portions. The condition of formula 1 is not met.

Assuming that the height of the conductor wires arranged in m-layers in the radial direction of the stator core in m layers is equal to the height of the conductor wires arranged in m 'layers when round conductor wires are used, the relation between m and m becomes represented by the following formula 11: m '= √ (π / 4) · m Formula 11 (m is an integer greater than or equal to 2)

At the coil, in which the radial direction of the stator core 5 m-layered arrangement of the lead wires 51 in the groove inner SI in the coil end regions CE1 and CE2 in a radial direction of the stator core 5 n-layered arrangement is transferred, the lead wires 51 are bent from the groove inner Si to the coil end portions CE1 and CE2 by the angles Θ and Θ ", in the coil end portions, the arrangement of the stator core in the radial direction 5 from the first layer to the n-th layer arranged conductor wires in the radial direction of the stator core (m - n + 1) -th layer to m-th layer is transferred and bent in this way lead wires before and after the arrangement change an angle Θ '(= 360 ° - (Θ + Θ'')), the conditions under which only the cross-sectional shape of the inside of the groove to be absorbed lead wires can be made into a square shape, the following are:
m is an integer greater than or equal to 2,
n is an integer greater than or equal to 1,
the angles of curvature Θ and Θ '' satisfy the formulas 2 and 3 and
the number of layers m and n satisfies formula 12. n / √ (π / 4) · m} ≤ 1/2 Formula 12

Consequently, the filling factor of the lead wires inside the groove SI can be improved.

In the above-mentioned cases, a method of pre-setting the coils has been explained in which the arrangement of the lead wires from the groove inside to the coil end portions are changed and the coils are inserted into the groove interior. However, a method may be employed in which coils are formed in which the arrangement of the stator winding changes from the groove interior to the coil end portions, and the stator winding is completed while the lead wires are wound on the stator core.

It should be noted that in this document, an electric rotary machine has been explained. Therefore, the stator core has a round shape. However, the present invention can also be applied to a stator core having a rectilinear shape. Therefore, the present invention can be applied not only to a rotary electric machine but also to a linear motion machine such as a linear motor.

Industrial Applicability

As explained above, the rotary electric machine according to the invention is suitable for a distributed winding.

LIST OF REFERENCE NUMBERS

• 1 . 200 . 300 . 400 . 500 . 600 . 700 electric rotary machine, 3 . 203 . 303 . 403 . 503 . 603 . 703 , Stator, 6 . 206 . 306 . 406 . 506 . 606 . 706 stator winding, 11 . 21 . 24 . 31 . 41 . 81 . 91 Lead wire 17 . 63a . 63b . 63c . 217 . 317 . 417 . 517 . 617 . 717 . 817 . 917 . 1017 . 1117 Kitchen sink.

Claims (13)

An electric rotary machine comprising: a stator core having an annular core back, a plurality of teeth extending in a radial direction from the core back and arranged in a circumferential direction, and a plurality of grooves circumferentially disposed between adjacent teeth, respectively and a stator winding received and wound in the slots of the stator core, wherein at each phase of the stator winding, a coil is formed by a bundle of multiple conductor wires, a winding of each of the phases of one or more coils arranged inside a groove is formed, each of the one or more coils comprises: a first conductor wire group lying in the groove inner in the radial direction of the stator core in m layers (m is an integer greater than or equal to 2), a second conductive wire group obtained by converting an arrangement of the first conductive wire group in a coil end region into an n-layered arrangement (n is an integer greater than or equal to 1) relative to the radial direction of the stator core, a first one Curvature region bent so that the first lead wire group and the second lead wire group enclose an angle Θ of less than 180 ° at a boundary between the groove interior and the coil end region, a third lead wire group obtained by transferring an arrangement of the second lead wire group in the coil end region in the radial direction of the stator core i n is disposed in a first to n-th position, is obtained in an order relative to the radial direction of the stator core arrangement of the (m - n + 1) -th layer to m-th layer, and a second curvature region which is curved so in that the second conductor wire group and the third conductor wire group in the coil end region enclose an angle Θ 'of less than 180 °, and wherein the number of layers m and n satisfies the condition n / m ≦ 1/2. The rotary electric machine according to claim 1, wherein the second curvature region has a crank shape when viewed from the direction of the rotation axis to change an arrangement in the radial direction between the second lead wire group and the third lead wire group. The rotary electric machine of claim 1, wherein each of the one or more coils further comprises: a fourth conductor wire group, which is arranged in the Nutinneren in the radial direction of the stator core in m layers (m is an integer greater than or equal to 2), and a third curvature region that is curved such that the third lead wire group and the fourth lead wire group enclose an angle Θ "of less than 180 ° at a boundary between the coil end portion and the groove inner, the angle Θ satisfies the condition 90 ° <Θ <180 °, the angle Θ '' satisfies the condition 90 ° <Θ '' <180 ° and the angle Θ 'satisfies the condition Θ' = 360 ° - (Θ + Θ ''). An electric rotary machine according to claim 3, wherein the angle Θ and the angle Θ '' are the same and the angle Θ 'satisfies the condition Θ' = 360 ° - 2Θ. An electric rotary machine according to claim 1, wherein when W represents the diameter of each conductor wire of the stator winding, the conductor wires in the second curvature region are arranged offset by a distance X at each turn of the lead wires in the circumferential direction of the stator core and the distance X satisfies the condition X = W / (- cosΘ). A rotary electric machine according to claim 1, wherein the number of the layers m and n satisfies the condition of n / m = 1/3. An electric rotary machine according to claim 1, wherein the number of plies m and n satisfy the condition n / {1 + √ (3) / 2 * (m-1)} ≤ 1/2 and arranged in Nutinneren lead wires are arranged in the radial direction of the stator core so that the lead wires of the layers in the groove inside are interlocked. An electric rotary machine according to claim 1, wherein a plurality of coils arranged inside the groove are connected to each other. The rotary electric machine according to claim 1, wherein a coil end of the conductive wire is arranged on a line connecting a winding start of the conductive wire to a center of the stator core with a plurality of coils disposed inside the same groove. The rotary electric machine according to claim 9, wherein, with a plurality of coils disposed inside the same groove, the coil end of the conductive wire and the second curved region are arranged on a line connecting the winding start of the conductive wire to the center of the stator core. An electric rotary machine according to claim 1, wherein the number of plies m and n satisfies the condition n / {1 + √ (π / 4) · m} ≤ 1/2 and a cross section of the inside of the groove arranged conductor wires has a substantially square shape. An electric rotary machine comprising: a stator core having an annular core back, a plurality of teeth extending in a radial direction from the core back and arranged in a circumferential direction, and a plurality of grooves circumferentially disposed between adjacent teeth, respectively , and a stator winding accommodated and wound in the slots of the stator core, wherein at each phase of the stator winding, a coil is formed by a bundle of multiple conductor wires, one winding of each of the phases is formed by one or more coils arranged inside a groove, each of one or more coils comprises: a first conductor wire group disposed in the groove interior in the radial direction of the stator core in m layers (m is an integer greater than or equal to 3), a second conductor wire group formed by transferring an arrangement of the first conductor wire group in one Coil end region is obtained in a relation to the radial direction of the stator core n-layered arrangement (n is an integer greater than or equal to 1), a first curvature region which is bent so that the first conductor wire group and the second conductor wire group at a boundary between the Nutinneren and the coil end region an angle Θ of a few r as a 180 °, a fifth conductive wire group formed by converting an arrangement of the second conductive wire group disposed in the coil end region in the first to n-th position relative to the radial direction of the stator core into a radial direction of the stator core (n + 1) -th to (m-n) -th layer, a fourth curvature region bent in the coil end region so that the second conductive wire group and the fifth conductive wire group form an angle Θ of about 180 °, a sixth conductive wire group by arranging an arrangement of the fifth conductor wire group, which is arranged in the coil end region in the (n + 1) th to (m - n) th position with respect to the stator core radial direction, in a radial direction of the stator core (m - n + 1) -th layer to m-th layer is obtained, and a fifth curvature region which is bent in the coil end region so that the fifth Leitun gsdrahtgruppe and the sixth conductor wire group an angle Θ 'of about 180 ° include, and the number of layers m and n satisfy the condition n / m ≤ 1/3. An electric rotary machine according to claim 12, wherein the fourth curvature region, when viewed from the direction of the rotation axis, has a crank shape for changing an arrangement in the radial direction between the second lead wire group and the fifth lead wire group, and the fifth curvature region has a crank shape when viewed from the direction of the rotation axis to change an arrangement in the radial direction between the fifth lead wire group and the sixth lead wire group.

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