Stator of rotating electrical machine and rotating electrical machine

Abstract

The present invention is a stator of a rotating electric machine, which comprises a plurality of standard segment conductors, a plurality of special-shaped segment conductors having shapes different from those of the standard segment conductors, and an iron core having a plurality of armature slots, wherein the standard segment conductors and the special-shaped segment conductors respectively comprise: a pair of straight portions, which are arranged in the armature slots at a predetermined interval; a bent portion, which is located on one side of the iron core in the axial direction of the stator and has a head; and a pair of terminal portions, which are formed on the other side of the iron core; the standard segment conductors and the special-shaped segment conductors are arranged along the circumference of the iron core. The stator is configured in a direction to form an inner coil and an outer coil outside the inner coil, the plurality of special-shaped segment conductors include an inner special-shaped segment conductor whose head position is inside relative to the head position of the standard segment conductor forming the inner coil or an outer special-shaped segment conductor whose head position is outside relative to the head position of the standard segment conductor forming the outer coil, and the head of the inner special-shaped segment conductor or the outer special-shaped segment conductor is located closer to the core in the axial direction of the stator than the head of the standard segment conductor.

Description

Technical Field

[0001] The present invention relates to a stator of a rotating electric machine and the rotating electric machine. Background Art

[0002] A rotating electrical machine such as an electric motor or a generator mounted on a vehicle or the like includes a rotatably mounted rotor and a stator disposed radially opposite to the rotor. The stator of the rotating electrical machine includes an iron core having a plurality of armature slots arranged in a circumferential direction and a plurality of segment conductors embedded in the plurality of armature slots of the iron core.

[0003] Patent Document 1 describes a stator of a rotating electric machine, which is provided with an annular iron core and a segment conductor, wherein the iron core has a plurality of armature slots arranged in a circumferential direction, and the segment conductor is embedded in the armature slot. In addition, the segment conductor has a plurality of steps at its turning portion.

[0004] Prior art literature

[0005] Patent Literature

[0006] Patent Document 1: Japanese Patent Application Publication No. 2009-112186 Summary of the invention

[0007] Problem that the invention aims to solve

[0008] Conventionally, there has been a problem that the segment conductors interfere with each other and the insertion position into the armature slot is restricted.

[0009] Technical means of solving problems

[0010] The stator of a rotating electric machine according to a first aspect of the present invention comprises a plurality of standard segment conductors, a plurality of special-shaped segment conductors having shapes different from those of the standard segment conductors, and an iron core having a plurality of armature slots, wherein the standard segment conductors and the special-shaped segment conductors preferably each comprise: a pair of straight portions arranged in the armature slots at a predetermined interval; a bent portion located on one side of the iron core in the axial direction of the stator and having a head; and a pair of terminal portions formed on the other side of the iron core; the standard segment conductors and the special-shaped segment conductors are arranged along the length of the iron core. The plurality of special-shaped segment conductors are arranged in a circumferential direction to form an inner coil and an outer coil located outside the inner coil, wherein the plurality of special-shaped segment conductors include an inner special-shaped segment conductor whose head position is located inside relative to the head position of the standard segment conductor forming the inner coil or an outer special-shaped segment conductor whose head position is located outside relative to the head position of the standard segment conductor forming the outer coil, and the head of the inner special-shaped segment conductor or the outer special-shaped segment conductor is located closer to the core in the axial direction of the stator than the head of the standard segment conductor.

[0011] A second aspect of the present invention is a rotating electrical machine comprising a stator and a rotor, wherein the stator has a plurality of standard segment conductors, a plurality of special-shaped segment conductors having shapes different from those of the standard segment conductors, and an iron core having a plurality of armature slots, and the rotor is arranged on the inner circumference of the stator, wherein the standard segment conductors and the special-shaped segment conductors preferably each have: a pair of straight portions arranged in the armature slots at a predetermined interval; a bent portion located on one side of the iron core in the axial direction of the stator and having a head; and a pair of terminal portions formed on the other side of the iron core; the standard segment conductors and the special-shaped segment conductors each have: a pair of straight portions arranged in the armature slots at a predetermined interval; a bent portion located on one side of the iron core in the axial direction of the stator and having a head; and a pair of terminal portions formed on the other side of the iron core; The special-shaped segment conductors are arranged along the circumferential direction of the core to form an inner coil and an outer coil outside the inner coil. The plurality of special-shaped segment conductors include an inner special-shaped segment conductor whose head position is inside relative to the head position of the standard segment conductor forming the inner coil or an outer special-shaped segment conductor whose head position is outside relative to the head position of the standard segment conductor forming the outer coil. The head of the inner special-shaped segment conductor or the outer special-shaped segment conductor is located closer to the core in the axial direction of the stator than the head of the standard segment conductor.

[0012] Effects of the Invention

[0013] According to the present invention, interference between segment conductors can be avoided, thereby allowing a degree of freedom in the insertion position into the armature slot.

[0014] Other problems, structures, and effects than those described above will become clear from the following description of specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is an appearance diagram of a rotating electrical machine.

[0016] Figure 2 A cross-sectional view of a rotating electrical machine.

[0017] Figure 3 A top view of a stator with coils arranged thereon.

[0018] Figure 4 A side view of a stator equipped with coils.

[0019] Figure 5 This is the appearance diagram of the standard segment conductor.

[0020] Figure 6 This is the appearance diagram of the lead-out segment conductor.

[0021] Figure 7 This is the appearance diagram of the first inner special-shaped section conductor.

[0022] Figure 8This is the appearance diagram of the second inner special-shaped segment conductor.

[0023] Fig. 9 This is the appearance of the first outer special-shaped section conductor.

[0024] Fig.10 This is the appearance diagram of the outer second special-shaped segment conductor. DETAILED DESCRIPTION

[0025] Below, with reference to the accompanying drawings, the embodiments of the present invention are described. The following description and drawings are examples for illustrating the present invention, and are omitted and simplified as appropriate for the purpose of clarifying the description. The present invention can be implemented in various other forms. Unless otherwise specified, each component may be singular or plural.

[0026] The positions, sizes, shapes, and ranges of the components shown in the drawings sometimes do not represent the actual positions, sizes, shapes, and ranges, so as to facilitate the understanding of the invention. Therefore, the present invention is not necessarily limited to the positions, sizes, shapes, and ranges disclosed in the drawings.

[0027] When there are a plurality of components having the same or similar functions, different suffixes may be added to the same reference numerals for description, but when there is no need to distinguish between the plurality of components, the suffix may be omitted for description.

[0028] Figure 1 1 is an appearance diagram of a rotary electric machine 100. The rotary electric machine 100 is used for auxiliary machines for vehicles, such as electric power steering. The rotary electric machine 100 includes a housing 1, a bracket 2, and a rotating shaft 3. The rotating shaft 3 as an output shaft protrudes from the bracket 2. A drive circuit (not shown) is arranged on the opposite side of the rotating shaft 3. A plurality of lead-out segment conductors 32 extend from the opposite side of the housing 1, that is, the side opposite to the mounting side of the bracket 2.

[0029] Figure 2: is a cross-sectional view of a rotating electric machine 100. An O-ring 6 is provided between a housing 1 and a bracket 2. A front bearing 5 supporting one end of a rotating shaft 3 is fixed to the bracket 2 by a tapered retaining ring 4. On the other hand, a rear bearing 10 supporting the other end of the rotating shaft 3 is provided on the housing 1. The rotating shaft 3 is rotatably supported by the front bearing 5 and the rear bearing 10. The rotor 12 provided on the rotating shaft 3 is an embedded structure or a surface magnet structure in which a permanent magnet 7 is provided in a rotor core 8. A stator 40 is provided on the inner circumference side of the housing 1 and on the outer circumference of the rotor 12. In other words, the rotor 12 is arranged on the inner circumference side of the stator 40. The stator 40 includes a stator core (iron core) 9, a plurality of armature slots arranged along the circumferential direction of the stator core 9, and a three-phase coil 20 embedded in the armature slots. The plurality of lead segment conductors 32 are led out on the coil end side on the opposite side to the output side, and protrude from the case 1 toward the control circuit side on the right side in the drawing.

[0030] Figure 3 1 is a plan view of the stator 40 on which the coil 20 is arranged. This figure is a plan view viewed from the side opposite to the side on which the bracket 2 is mounted. Figure 4 It is a side view of the stator 40 provided with the coil 20 .

[0031] like Figure 3 , Figure 4 As shown in FIG. 1 , a plurality of lead-out segment conductors 32 are led out from the coil end portion disposed on the axial upper side of the stator core 9. Figure 3 As shown, the coil 20 is arranged along the circumferential direction of the stator core 9, and includes an inner coil 20a and an outer coil 20b located outside the inner coil 20a.

[0032] like Figure 4 As shown in FIG. 1 , a connecting portion 13 of a segment conductor 30 constituting the coil 20 is provided on the opposite side of the coil end of the stator core 9. Each segment conductor 30 is connected in the axial direction of the stator core 9 and is Figure 4 The end of the inserted segment conductor 30 is inserted from the opposite side of the armature slot, that is, in the axial direction of the stator core 9. Figure 4 The terminal end of the segment conductor 30 protruding downward from the axial direction of the stator core 9 is connected by soldering, Tig welding, laser welding, etc. to form a connection portion 13.

[0033] The segment conductor 30 is composed of a standard segment conductor 31, a lead segment conductor 32, and special-shaped segment conductors 33 and 34. The inner coil 20a and the outer coil 20b are formed by fitting these segment conductors 30 into the armature slots of the stator core 9. The special-shaped segment conductors 33 and 34 include an inner first special-shaped segment conductor 33a and an inner second special-shaped segment conductor 34a constituting a part of the inner coil 20a, and an outer first special-shaped segment conductor 33b and an outer second special-shaped segment conductor 34b constituting a part of the outer coil 20b.

[0034] Figure 5 31 is an appearance diagram of a standard segment conductor 31. Figure 5 As shown, the standard segment conductor 31 has a pair of straight portions 311, a bent portion 313, and a pair of terminal portions 314. The pair of straight portions 311 are arranged in the armature slots at a predetermined interval. The bent portion 313 is located on one side of the stator core 9 in the axial direction of the stator 40 and has a head 312. The pair of terminal portions 314 are formed on the other side of the stator core 9. In order to insert the standard segment conductor 31 from the top end of the terminal portion 314 into the armature slot, the pair of terminal portions 314 are in a straight line shape as shown in the dashed lines, but are bent and formed after being inserted into the armature slot to be connected to other segment conductors.

[0035] Figure 6 FIG. 2 is an appearance diagram of the lead-out segment conductor 32. Figure 6 As shown, it has a straight portion 321, a lead wire portion 323 and a terminal portion 324, wherein the straight portion 321 is arranged in the armature slot, the lead wire portion 323 is led out to the outside of the stator core 9 as a lead wire, and the terminal portion 324 is formed on the other side of the stator core 9. In order to insert the lead-out segment conductor 32 from the top end of the terminal portion 314 into the armature slot, the terminal portion 324 is in a straight line shape as shown in the dashed line, but is bent and formed after being inserted into the armature slot to be connected to other segment conductors.

[0036] Figure 7 FIG. 2 is an appearance diagram of the first inner shaped segment conductor 33a. Figure 7 As shown in FIG. 1 , the first inside special-shaped segment conductor 33a has a pair of straight portions 331, a bent portion 333a, and a pair of terminal portions 334. The pair of straight portions 331 are arranged in the armature slots at a predetermined interval (the same interval as the interval of the standard segment conductor 31), the bent portion 333a is located on one side of the stator core 9 in the axial direction of the stator 40 and has a head 332a, and the pair of terminal portions 334 are formed on the other side of the stator core 9. In order to insert the first inside special-shaped segment conductor 33a from the top end of the terminal portion 334 into the armature slot, the pair of terminal portions 334 are in a straight line shape as shown in the dashed lines in the figure, but are bent and formed after being inserted into the armature slot to be connected to the terminal portion 314 of the standard segment conductor 31.

[0037] In the inner first special-shaped segment conductor 33a, Figure 3 As shown in FIG. 1 , the head 332a of the first inside special-shaped segment conductor 33a is located above the head 312 of the standard segment conductor 31, and is in a straight line across the heads 312 of the plurality of standard segment conductors 31. If only the first inside special-shaped segment conductor 33a is installed in the stator core 9, if the plurality of first inside special-shaped segment conductors 33a are arranged in the vicinity, the heads 332a thereof will interfere with each other. Therefore, each lead-out segment conductor 32 must be installed at a position farther away from the armature slots into which the first inside special-shaped segment conductor 33a is inserted. In this case, the lead-out segment conductors 32 are separated from each other, so the lead-out wire portions 323 of each lead-out segment conductor 32 must be made to climb and approach each other on the stator core 9, resulting in a disadvantage that the lead-out wire portions 323 become longer. In order to eliminate such a disadvantage, in this embodiment, the second inside special-shaped segment conductor 34a described below is newly provided.

[0038] Figure 8 FIG. 2 is an appearance diagram of the inner second special-shaped segment conductor 34a. Figure 8 As shown in FIG. 1 , the inner second special-shaped segment conductor 34a has a pair of straight portions 341, a bent portion 343a, and a pair of terminal portions 344. The pair of straight portions 341 are arranged in the armature slots at a predetermined interval. The bent portion 343a is located on one side of the stator core 9 in the axial direction of the stator 40 and has a head portion 342a. The pair of terminal portions 344 are formed on the other side of the stator core 9. In order to insert the inner second special-shaped segment conductor 34a from the top end of the terminal portion 344 into the armature slot, the pair of terminal portions 344 are straight line-shaped as shown in the dashed lines in the figure, but are bent and formed after being inserted into the armature slot to be connected to the terminal portion 314 of the standard segment conductor 31.

[0039] Figure 7 The height h1 from the starting point of the bent portion 333a to the head 332a of the first inner modified segment conductor 33a is greater than Figure 8 The height h2 from the starting point of the bent portion 343a to the head portion 342a of the illustrated inner second modified segment conductor 34a is large.

[0040] like Figure 3As shown in FIG. 1 , the first inner special-shaped segment conductor 33a and the second inner special-shaped segment conductor 34a are embedded in the armature slot of the stator core 9 together with the standard segment conductor 31 and the lead-out segment conductor 32 to form the inner coil 20a. Here, the head position of the second inner special-shaped segment conductor 34a is located inside the stator 40 relative to the head position of the standard segment conductor 31 forming the inner coil 20a. Moreover, the head of the second inner special-shaped segment conductor 34a is located closer to the stator core 9 in the axial direction of the stator 40 than the head of the standard segment conductor 31. Furthermore, the head position of each of the plurality of second inner special-shaped segment conductors 34a is located between the plurality of standard segment conductors 31. In addition, the number of the second inner special-shaped segment conductors 34a arranged on the stator 40 is less than the number of the standard segment conductors 31. In addition, the head portion 342a of the inner second special-shaped segment conductor 34a is located at a position farther from the stator core 9 than other portions on the bent portion 343a of the inner second special-shaped segment conductor 34a. In this case, the head portion 342a may be a straight line parallel to one end surface of the stator core 9, or may be other shapes such as an S-shape, and is not limited to a straight line. Furthermore, the head portion 342a may be located at a position farther from the stator core 9 in the axial direction of the stator 40 than other portions on the bent portion 343a of the inner second special-shaped segment conductor 34a.

[0041] In this way, since the inner second modified segment conductor 34a is provided with the head 342a disposed on the inner circumference side of the stator 40, the modified segment conductors 33 and 34 can be disposed close to each other to avoid interference between the inner first modified segment conductor 33a and the inner second modified segment conductor 34a. As a result, the degree of freedom in arranging the modified segment conductors 33 and 34 is improved, and wiring in which a plurality of lead segment conductors 32 are disposed close to each other can be realized, so that the length of the lead wire portion 323 of the lead segment conductor 32 can be shortened. Furthermore, the position of the head 343a of the inner second modified segment conductor 34a is disposed closer to the stator core 9 than that of the inner first modified segment conductor 33a, thereby also reducing the length of the inner second modified segment conductor 34a. For example, the length of the inner first modified segment conductor 33a is 145 mm, while the length of the inner second modified segment conductor 34a can be reduced to 132 mm.

[0042] Next, the outer first special-shaped segment conductor 33b and the outer second special-shaped segment conductor 34b constituting the outer coil 20b will be described. Figure 3 As shown, the outer first special-shaped segment conductor 33b is formed as its head 332b (refer to Fig. 9 ) toward the outer peripheral side of the stator 40, and the head 332a of the inner first special-shaped segment conductor 33a (reference Figure 7 ) are in different directions. Figure 3As shown, the outer second special-shaped segment conductor 34b is formed as its head 342b (refer to Fig.10 ) toward the outer peripheral side of the stator 40, and the head 342a (reference Figure 8 ) have different orientations.

[0043] Fig. 9 FIG. 2 is an appearance diagram of the outer first special-shaped segment conductor 33 b. Fig. 9 As shown in FIG. 1 , the outer first special-shaped segment conductor 33b has a pair of straight portions 331, a bent portion 333b, and a pair of terminal portions 334. The pair of straight portions 331 are arranged in the armature slots at a predetermined interval. The bent portion 333b is located on one side of the stator core 9 in the axial direction of the stator 40 and has a head portion 332b. The pair of terminal portions 334 are formed on the other side of the stator core 9. In order to insert the outer first special-shaped segment conductor 33b from the top end of the terminal portion 334 into the armature slot, the pair of terminal portions 334 are in a straight line shape as shown in the dashed lines in the figure, but are bent and formed after being inserted into the armature slot to be connected to the terminal portion 314 of the standard segment conductor 31.

[0044] In the outer first special-shaped segment conductor 33b, Figure 3 As shown in FIG. 1 , the head 332b of the first outer special-shaped segment conductor 33b is located above the head 312 of the standard segment conductor 31 and is in a straight line across the heads 312 of the plurality of standard segment conductors 31. If only the first outer special-shaped segment conductor 33b is installed in the stator core 9, if the plurality of first outer special-shaped segment conductors 33b are arranged in the vicinity, the heads 332b thereof will interfere with each other. Therefore, each lead-out segment conductor 32 must be installed at a position farther away than the armature slot interval into which the first outer special-shaped segment conductor 33b is inserted. In this case, the lead-out segment conductors 32 are separated from each other, so the lead-out wire portions 323 of each lead-out segment conductor 32 must be made to climb and approach on the stator core 9, resulting in a disadvantage that the lead-out wire portions 323 become longer. In order to eliminate such a disadvantage, in this embodiment, the second outer special-shaped segment conductor 34b described below is newly provided.

[0045] Fig.10 FIG. 2 is an appearance diagram of the outer second special-shaped segment conductor 34 b. Fig.10As shown in FIG. 1 , the outer second special-shaped segment conductor 34b has a pair of straight portions 341, a bent portion 343b, and a pair of terminal portions 344. The pair of straight portions 341 are arranged in the armature slots at a predetermined interval. The bent portion 343b is located on one side of the stator core 9 in the axial direction of the stator 40 and has a head portion 342b. The pair of terminal portions 344 are formed on the other side of the stator core 9. In order to insert the outer second special-shaped segment conductor 34b from the top end of the terminal portion 344 into the armature slot, the pair of terminal portions 344 are in a straight line shape as shown in the dashed lines in the figure, but are bent and formed after being inserted into the armature slot to be connected to the terminal portion 314 of the standard segment conductor 31.

[0046] Fig. 9 The height h1 from the starting point of the bent portion 333b to the head portion 332b of the outer first modified segment conductor 33b is greater than Fig.10 The height h2 from the starting point of the bent portion 343b to the head portion 342b of the outer second modified segment conductor 34b shown in FIG.

[0047] like Figure 3 As shown in FIG. 1 , the first outer special-shaped segment conductor 33b and the second outer special-shaped segment conductor 34b are embedded in the armature slot of the stator core 9 together with the standard segment conductor 31 and the lead-out segment conductor 32 to form the outer coil 20b. Here, the head position of the second outer special-shaped segment conductor 34b is located on the outer peripheral side of the stator 40 relative to the head position of the standard segment conductor 31 forming the outer coil 20b. Figure 4 As shown in FIG. 1 , the head of the outer second special-shaped segment conductor 34b is located closer to the stator core 9 in the axial direction of the stator 40 than the head of the standard segment conductor 31. Furthermore, the head of each of the plurality of outer second special-shaped segment conductors 34b is located between the plurality of standard segment conductors 31. In addition, the number of outer second special-shaped segment conductors 34b arranged on the stator 40 is less than the number of standard segment conductors 31. In addition, the head 342b of the outer second special-shaped segment conductor 34b is located farther from the stator core 9 than other parts on the bent portion 343b of the outer second special-shaped segment conductor 34b. In this case, the head 342b may be a straight line parallel to one end surface of the stator core 9, or may be other shapes such as an S-shape, and is not limited to a straight line. Furthermore, the head portion 342 b may be located farther from the stator core 9 in the axial direction of the stator 40 than other portions on the bent portion 343 b of the outer second special-shaped segment conductor 34 b.

[0048] In this way, since the outer second special-shaped segment conductor 34b is provided with the head 342b arranged on the outer peripheral side of the stator 40, the special-shaped segment conductors 33 and 34 can be arranged close to each other to avoid interference between the outer first special-shaped segment conductor 33b and the outer second special-shaped segment conductor 34b. As a result, the degree of freedom in arranging the special-shaped segment conductors 33 and 34 is improved, and wiring in which a plurality of lead-out segment conductors 32 are arranged close to each other can be realized, so that the length of the lead-out wire portion 323 of the lead-out segment conductor 32 can be shortened. Furthermore, the outer second special-shaped segment conductor 34b is arranged with the head 343a at a position closer to the stator core 9 than the outer first special-shaped segment conductor 33b, thereby also reducing the length of the outer second special-shaped segment conductor 34b. For example, the length of the outer first special-shaped segment conductor 33b is 145 mm, while the length of the outer second special-shaped segment conductor 34b can be reduced to 132 mm.

[0049] According to the above-described embodiment, the following effects are obtained.

[0050] (1) The stator 40 of the rotating electrical machine 100 includes a plurality of standard segment conductors 31, a plurality of special-shaped segment conductors (inner second special-shaped segment conductors 34a, outer second special-shaped segment conductors 34b) having shapes different from those of the standard segment conductors 31, and an iron core 9 having a plurality of armature slots. The standard segment conductors 31 and the special-shaped segment conductors (inner second special-shaped segment conductors 34a, outer second special-shaped segment conductors 34b) each include: a pair of straight portions 311, 341 disposed in the armature slots at a predetermined interval; bent portions 313, 343a, 343b disposed on one side of the iron core 9 in the axial direction of the stator 40 and including head portions 312, 342a, 342b; and a pair of terminal portions 314, 344 formed on the other side of the iron core 9. The special-shaped segment conductors are arranged along the circumferential direction of the core 9 to form the inner coil 20a and the outer coil 20b located outside the inner coil 20a. The plurality of special-shaped segment conductors (the inner second special-shaped segment conductor 34a and the outer second special-shaped segment conductor 34b) include the inner second special-shaped segment conductor 34a whose head position is located inside relative to the head position of the standard segment conductor 31 forming the inner coil or the outer second special-shaped segment conductor 34b whose head position is located outside relative to the head position of the standard segment conductor 31 forming the outer coil 20b. The head 342a of the inner second special-shaped segment conductor 34a or the head 342b of the outer second special-shaped segment conductor 34b is located closer to the core 9 in the axial direction of the stator 40 than the head 312 of the standard segment conductor 31. Thus, the segment conductors can be inserted into the armature slots with a degree of freedom by avoiding interference between each other.

[0051] (2) The rotating electrical machine 100 includes a stator 40 and a rotor 12, wherein the stator 40 includes a plurality of standard segment conductors 31, a plurality of special-shaped segment conductors (inner second special-shaped segment conductors 34a, outer second special-shaped segment conductors 34b) having shapes different from those of the standard segment conductors 31, and an iron core 9 having a plurality of armature slots, and the rotor 12 is arranged on the inner circumference of the stator 40, wherein the standard segment conductors 31 and the special-shaped segment conductors (inner second special-shaped segment conductors 34a, outer second special-shaped segment conductors 34b) respectively include: a pair of straight portions 311, 341 arranged in the armature slots at a predetermined interval; bent portions 313, 343a, 343b located on one side of the iron core 9 in the axial direction of the stator 40 and including head portions 312, 342a, 342b; and a pair of terminal portions 314, 344 forming On the other side of the core 9, the standard segment conductor 31 and the special-shaped segment conductor are arranged along the circumferential direction of the core 9 to form an inner coil 20a and an outer coil 20b located outside the inner coil 20a. The plurality of special-shaped segment conductors (inner second special-shaped segment conductor 34a, outer second special-shaped segment conductor 34b) include an inner second special-shaped segment conductor 34a whose head position is located inside relative to the head position of the standard segment conductor 31 forming the inner coil or an outer second special-shaped segment conductor 34b whose head position is located outside relative to the head position of the standard segment conductor 31 forming the outer coil 20b. The head 342a of the inner second special-shaped segment conductor 34a or the head 342b of the outer second special-shaped segment conductor 34b is located closer to the core 9 in the axial direction of the stator 40 than the head 312 of the standard segment conductor 31. Thus, the segment conductors can be inserted into the armature slots with a degree of freedom by avoiding interference between each other.

[0052] (Variation Example)

[0053] The present invention can be implemented by modifying the above-described embodiments in the following manners.

[0054] (1) In the embodiment, the example in which the height h2 from the starting point of the bent portion 343a of the inner second special-shaped segment conductor 34a to the head portion 342a is the same among the plurality of inner second special-shaped segment conductors 34a is described, but the heights may be different among the plurality of inner second special-shaped segment conductors 34a. Similarly, the example in which the height h2 from the starting point of the bent portion 343b of the outer second special-shaped segment conductor 34b to the head portion 342b is the same among the plurality of outer second special-shaped segment conductors 34b is described, but the heights may be different among the plurality of outer second special-shaped segment conductors 34b. Thus, the special-shaped segment conductors 33 and 34 can be arranged close to each other without interfering with each other, so that the degree of freedom in arranging the special-shaped segment conductors 33 and 34 is improved.

[0055] The present invention is not limited to the above-described embodiment, and other forms that can be considered within the scope of the technical concept of the present invention are also included in the scope of the present invention as long as the features of the present invention are not impaired. In addition, the above-described embodiment and the modified example may be combined.

[0056] The disclosures of the following priority basic applications are incorporated herein by reference:

[0057] Japanese patent application 2019-155066 (filed on August 27, 2019).

[0058] Explanation of symbols

[0059] 1…housing, 2…bracket, 3…rotating shaft, 4…tapered retaining ring, 5…front bearing, 6…O-ring, 7…permanent magnet, 8…rotor core, 9…stator core (core), 10…rear bearing, 12…rotor, 20…coil, 31…standard segment conductor, 32…lead-out segment conductor, 33a…inner first special-shaped segment conductor, 34a…inner second special-shaped segment conductor, 33b…outer first special-shaped segment conductor, 34b…outer second special-shaped segment conductor, 40…stator, 100…rotating electric machine.

Claims

1. A stator of a rotating electric machine, comprising a plurality of standard segment conductors, a plurality of special-shaped segment conductors having shapes different from those of the standard segment conductors, and an iron core having a plurality of armature slots, wherein: The standard segment conductor and the special-shaped segment conductor each have: a pair of straight portions, which are arranged in the armature slots at a predetermined interval; a bent portion, which is located on one side of the core in the axial direction of the stator and has a head; and a pair of terminal portions, which are formed on the other side of the core. The standard segment conductor and the special-shaped segment conductor are arranged along the circumferential direction of the core to form an inner coil and an outer coil located outside the inner coil. The plurality of special-shaped segment conductors include an inner first special-shaped segment conductor whose head position is above the head position of the standard segment conductor forming the inner coil and an inner second special-shaped segment conductor whose head position is located inside relative to the head position of the standard segment conductor forming the inner coil, or include an outer first special-shaped segment conductor whose head position is above the head position of the standard segment conductor forming the outer coil and an outer second special-shaped segment conductor whose head position is located outside relative to the head position of the standard segment conductor forming the outer coil, and the head of the inner second special-shaped segment conductor or the outer second special-shaped segment conductor is located closer to the core in the axial direction of the stator than the head of the standard segment conductor.

2. The stator of a rotating electrical machine according to claim 1, characterized in that: The plurality of special-shaped segment conductors include the inner first special-shaped segment conductor, the inner second special-shaped segment conductor, the outer first special-shaped segment conductor, and the outer second special-shaped segment conductor.

3. The stator of a rotating electrical machine according to claim 1 or 2, characterized in that: The end portion of each of the special-shaped segment conductors is welded to the end portion of the standard segment conductor on the other side of the core.

4. The stator of a rotating electrical machine according to claim 1 or 2, characterized in that: The head portion of each of the inner second special-shaped segment conductor and the outer second special-shaped segment conductor is located between the plurality of standard segment conductors.

5. The stator of a rotating electrical machine according to claim 1 or 2, characterized in that: The number of the special-shaped segment conductors arranged on the stator is less than the number of the standard segment conductors.

6. The stator of a rotating electrical machine according to claim 1 or 2, characterized in that: The bent portion of each of the standard segment conductor and the special-shaped segment conductor is a conductor exposed outside the armature slot from two different armature slots in which the pair of straight portions are arranged on the one side of the core.

7. The stator of a rotating electrical machine according to claim 1 or 2, characterized in that: The head portions of the inner second special-shaped segment conductor and the outer second special-shaped segment conductor are located farther from the core than other portions of the inner second special-shaped segment conductor and the outer second special-shaped segment conductor on the bent portions.

8. The stator of a rotating electrical machine according to claim 7, characterized in that: The head portions of the inner second special-shaped segment conductor and the outer second special-shaped segment conductor are located farther from the core in the axial direction of the stator than other portions on the bent portions of the inner second special-shaped segment conductor and the outer second special-shaped segment conductor.

9. A rotating electrical machine comprising a stator and a rotor, wherein the stator has a plurality of standard segment conductors, a plurality of special-shaped segment conductors having shapes different from those of the standard segment conductors, and an iron core having a plurality of armature slots, and the rotor is arranged on the inner circumference of the stator, wherein: The standard segment conductor and the special-shaped segment conductor each have: a pair of straight portions, which are arranged in the armature slots at a predetermined interval; a bent portion, which is located on one side of the core in the axial direction of the stator and has a head; and a pair of terminal portions, which are formed on the other side of the core; the standard segment conductor and the special-shaped segment conductor are arranged along the circumferential direction of the core to form an inner coil and an outer coil located outside the inner coil, The plurality of special-shaped segment conductors include an inner first special-shaped segment conductor whose head position is above the head position of the standard segment conductor forming the inner coil and an inner second special-shaped segment conductor whose head position is located inside relative to the head position of the standard segment conductor forming the inner coil, or include an outer first special-shaped segment conductor whose head position is above the head position of the standard segment conductor forming the outer coil and an outer second special-shaped segment conductor whose head position is located outside relative to the head position of the standard segment conductor forming the outer coil, and the head of the inner second special-shaped segment conductor or the outer second special-shaped segment conductor is located closer to the core in the axial direction of the stator than the head of the standard segment conductor.

10. The rotating electrical machine according to claim 9, characterized in that The plurality of special-shaped segment conductors include the inner first special-shaped segment conductor, the inner second special-shaped segment conductor, the outer first special-shaped segment conductor, and the outer second special-shaped segment conductor.

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