JP2021040457A - Stator of rotary electric machine, method for manufacturing stator of rotary electric machine, and method for managing segment coil used for rotary electric machine - Google Patents

Abstract

To provide a stator of a rotary electric machine which can find a cause of quality deterioration in as short time as possible when a segment coil the quality of which does not satisfy a standard is found, a method for manufacturing the stator of the rotary electric machine, and a method for managing the segment coil which is used for the rotary electric machine.SOLUTION: The present invention preferably displays identification information on each segment coil constituting a stator coil which is used for a rotary electric machine.SELECTED DRAWING: Figure 13

Description

The present invention relates to a stator of a rotary electric machine, a method of manufacturing a stator of a rotary electric machine, and a method of managing a segment coil used in the rotary electric machine.

Conventionally, it is known that a stator coil constituting a stator of a rotary electric machine such as a motor is formed by welding a plurality of segment coils as shown in, for example, Patent Document 1. Since such a stator coil is configured by using a large number of segment coils, each segment coil needs to maintain a certain quality.

Japanese Unexamined Patent Publication No. 2018-107863

However, in the past, if the quality of the segment coil before welding did not meet the standard, there was a problem that it took a lot of time to verify what caused the quality to not be met. It was.
An object of the present invention is a rotary electric machine stator, a method for manufacturing a rotary electric machine stator, and a rotary electric machine, which can find out the cause of quality deterioration in a short time when a segment coil whose quality does not meet the standard is found. It is an object of the present invention to provide a method of managing a segment coil used in the above.

The present invention is preferably characterized in that identification information is displayed on each segment coil.

According to the present invention, when a segment coil whose quality does not meet the standard is found, the cause of the quality deterioration can be found in the shortest possible time.

It is an exploded perspective view which shows the rotor and the stator of the rotary electric machine which concerns on Embodiment 1. FIG. It is a perspective view of the stator which concerns on Embodiment 1. FIG. It is a process drawing which shows the stator manufacturing process in the manufacturing equipment of Embodiment 1. FIG. It is a perspective view which shows the segment coil of Embodiment 1. FIG. FIG. 5 is an enlarged view showing a welded portion of the coil end of the first embodiment. It is a process chart which shows the segment coil manufacturing process in the manufacturing equipment of Embodiment 1. It is the schematic which shows the segment coil manufacturing process in the manufacturing equipment of Embodiment 1. FIG. It is a schematic diagram which shows the molecular orientation of the insulating film coated on the coil wire of Embodiment 1. It is the schematic which shows the identification code assigning apparatus and the assigning method of Embodiment 1. FIG. It is a schematic diagram which shows the case where the polarization direction of the linearly polarized UV laser light and the molecular orientation direction of an insulating film coincide with each other. It is the schematic which shows the case where the polarization direction of the linearly polarized UV laser light and the molecular orientation direction of an insulating film are orthogonal. It is the schematic which shows the state of irradiating the linearly polarized UV laser light orthogonal to the molecular orientation direction of an insulating film. It is the schematic which shows the 2D code addition position as the identification code to the segment coil of Embodiment 1. It is an enlarged schematic view of the part which gave the segment coil of Embodiment 1 a two-dimensional code as an identification code. It is an enlarged schematic view of the part which gave the segment coil of another embodiment a two-dimensional code as an identification code.

Hereinafter, a mode for realizing the stator of the rotary electric machine, the method for manufacturing the stator of the rotary electric machine, and the method for managing the segment coil used in the rotary electric machine will be described based on the embodiments shown in the drawings.

(Embodiment 1)
FIG. 1 is an exploded perspective view showing the rotor 10 and the stator 11 of the rotary electric machine 1 according to the first embodiment, and FIG. 2 is a perspective view of the stator 11 according to the first embodiment. The rotary electric machine 1 is, for example, a three-phase (U-phase, V-phase, W-phase) 8-pole AC permanent magnet synchronous motor that drives the drive wheels of an electric vehicle (not shown) or generates electricity by the regenerative braking force from the drive wheels. It is composed. The rotary electric machine 1 includes a cylindrical stator 11 and a rotor 10 rotatably housed inside the stator 11.
The stator 11 is a three-phase stator coil 13U, 13V, 13W formed by a stator core 12 formed by laminating a plurality of annular electromagnetic steel plates and a flat wire wound around the stator core 12 in a wavy shape. (Also collectively referred to as a stator coil 13). A large number of teeth and slots are alternately formed in the stator core 12 in the circumferential direction (same as the rotation direction of the rotary electric machine 1) at equal intervals, and terminals for three phases are connected to the ends.

FIG. 4 is a perspective view showing the segment coil 131 of the first embodiment. The stator coil 13 is configured by combining a plurality of segment coils 131 in which a flat wire having a quadrangular cross section is bent into a pine needle shape in the circumferential direction in the stator core 12. The end of the coil on the first lap and the start of the coil on the second lap are connected by a subcoil segment.
The bent portion of the segment coil 131 on the apex side of the pine needle extends in the circumferential direction and shifts to the adjacent layer at the apex portion of the pine needle. Since the segment coil 131 extends diagonally in the circumferential direction, the segment coil 131 can be vertically overlapped with the segment coil deviated by one pitch. Since the vertices that shift to the adjacent layer are also shifted by one pitch, they do not interfere with each other, and the top and bottom of the vertices are interchanged. The layer shifts to the opposite layer at the welding position between the adjacent coil ends 131a (see FIG. 4B). Here, too, the top and bottom are switched with the segment coil 131 that is off by one pitch.

FIG. 3 is a process diagram showing a stator manufacturing process in the manufacturing equipment of the first embodiment.
In step S1, the stator core 12 is supplied.
In step S2, the serial number is stamped on the stator core 12.
In step S3, the slot liner 12a, which is an insulating paper, is formed and inserted along the slot formed on the inner circumference of the stator core 12.

In step S4, a plurality of segment coils 131 are set in the coil insertion jig. As shown in FIG. 4A, the vicinity of the coil end 131a of the segment coil 131 at this point is not bent and has a linear shape.

In step S5, the stator coil 13 in which a plurality of segment coils 131 are set as a set is inserted into the stator core 12. If the stator coils 13 set in one set cannot be inserted into the stator core 12, the identification codes given to the plurality of segment coils 131 constituting the stator coils 13 are read, and the information recorded in the management PC described later is recorded. To update.

As will be described later, an identification code is individually assigned to the segment coil 131, and the quality of the segment coil 131 is individually managed based on the identification code. However, even if one segment coil 131 satisfies a certain quality standard, a problem may occur in the state of the stator coil 13 in which a plurality of the segment coils 131 are combined. Therefore, when the inspection machine recognizes that a defect occurs in the state of the stator coil 13, the segment coil 131 constituting the stator coil 13 in which the defect has occurred is discarded and associated with the identification code of the discarded segment coil 13. Based on the production line and processing time, the processing amount of the bending machine that produced the segment coil 131 recognized as defective and the processing conditions of the press machine are corrected.

In step S6, a coil expansion / twisting step is performed, and as shown in FIG. 4B, the vicinity of the coil end 131a is bent and twisted so that the coil end 131a can be shifted to the adjacent layer.
In step S7, the coil end 131a is cut to a desired appropriate length.

In step S8, the coil end 131a and the coil end 131a of the adjacent adjacent layer are welded and joined. FIG. 5 is an enlarged view showing a welded portion of the coil end of the first embodiment. A plurality of welded portions are arranged at equal intervals along the circumferential direction. When the welded portion arranged along the circumferential direction is defined as the joint array layer, the outer layer and the inner layer are arranged along the inner diameter side of the joint array layer.
In step S9, the terminal is connected to a predetermined segment coil 131 of the coil.
In step S10, interstage paper, which is an insulating paper, is inserted between the outer layer and the inner layer of the welded portions arranged in two rows in the circumferential direction.
In step S11, the varnish is poured into the gap between the stator and the coil, the varnish treatment for fixing the stator core 12 and the coil is performed, and the stator manufacturing process is completed.

FIG. 6 is a process chart showing the segment coil manufacturing process in the manufacturing facility of the first embodiment, and FIG. 7 is a schematic view showing the segment coil manufacturing process in the manufacturing facility of the first embodiment. In the segment coil manufacturing process, the identification code information, the processing amount of the bending machine, and the processing conditions of the press machine are set by the process management computer (hereinafter, management PC).

In step S101, the winding material is set. The winding material is a conductor metal material 301 having a rectangular cross section, in which a coil wire whose surface is coated with an insulating film 300 is wound.
In step S102, the coil wire is sent out while removing the distortion of the winding material by the anchorer.
In step S103, the strain applied when the coil wire is wound as the winding material is corrected in the horizontal and vertical directions to obtain a straight coil wire.
In step S104, the insulating film 300 at the end (welded portion) of the coil wire is peeled off.

In step S105, the coil wire is bent in a U shape in the plane direction by a bending machine, and an identification code, which is identification information, is added to the surface of the coil wire (that is, the insulating film 300) to cut the coil wire. In the first embodiment, a two-dimensional code 200 is assigned as an identification code for each of the segment coils 131. FIG. 13 is a schematic view showing a position where an identification code is assigned to the segment coil 131. The two-dimensional code 200 is given to two positions that can be read from the outside even when a plurality of segment coils 131 are set as coils in a set. Further, since a flat wire is used as the coil, the two-dimensional code 200 can be displayed on a flat portion, and the displayability and readability of information are ensured.

In step S106, the identification code is read and the bent portion bent into a U shape by a press machine is press-bent. As a result, the segment coil 131 can be shifted to the adjacent layer. Then, the three-dimensional dimension measurement is performed on the press-bent segment coil 131, and the identification code and the measurement result are output to the management PC. In the management PC, the machining time, the three-dimensional dimension measurement result, and the identification code are linked. Then, based on the three-dimensional dimensional measurement result, it is determined whether or not the quality meets a certain standard, and if the standard is satisfied, the process proceeds to step S107, and if the standard is not satisfied, the processed product is produced. Is discarded, and the identification information of the discarded product is recorded in the management PC. Specifically, from the identification information of products that do not meet the criteria, the processing amount of the bending machine and the processing conditions of the press machine corresponding to the processing time associated with the identification information are searched, and the searched processing amount is searched. And the correction calculation of the processing conditions is performed. Then, the corrected machining amount and machining conditions are output to the bending machine and the press machine.
In step S107, the process proceeds to the stator assembly step (step S4 in FIG. 3).

Here, the reason for assigning the identification code to each segment coil 131 will be described. The step of manufacturing the segment coil 131 includes a bending step by a bending machine and a press bending step by a press machine. In each process, it is processed so that it has a predetermined bending amount, and even after processing, it is checked by three-dimensional dimensional measurement whether it is within the specified variation range, so it is not necessary to assign an identification code to each one. It seems like that. However, since the stator coil 13 is formed by combining a plurality of segment coils 131 into one coil, even if the distortion of each segment coil 131 is within a predetermined variation range, all the segment coils 131 If is biased to one side of the variation range, it may not be possible to insert it into the slot formed in the stator core 12 when assembled as the stator coil 13.

In this case, the identification code of the segment coil 131 constituting the stator coil 13 is confirmed, and the setting of the bending machine or the press machine corresponding to the processing time in the production line to which this identification code is given is corrected. As described above, since each segment coil 131 has an identification code, the cause of quality deterioration can be found in the shortest possible time. From this point of view, it is extremely important in terms of manufacturing control to assign an identification code to each segment coil 131.

FIG. 8 is a schematic view showing the molecular orientation of the insulating film coated on the coil wire of the first embodiment. When the coil wire is coated with an insulating resin, a polyimide resin or a polyamide resin (hereinafter, these are also collectively referred to as a resin material) is applied in a high-temperature molten state and cooled to form an insulating film 300. To do. As shown in FIG. 8A, the resin material in the high-temperature molten state has random molecular directions and no orientation. However, in the cooling process of the resin material, there is a difference in the linear expansion coefficient of the resin material as compared with the conductor metal material 301, and the coefficient of thermal expansion of the resin material is larger than the coefficient of thermal shrinkage of the conductor metal material. Therefore, when the resin material shrinks, a tensile force is generated in the insulating film 300, and the molecular orientation is aligned along the outer peripheral direction (direction orthogonal to the extending direction of the coil wire) of the conductor metal material 301 due to the elongation orientation phenomenon. It was found to have molecular orientation. In the first embodiment, the identification code is assigned by the linearly polarized laser light by utilizing this molecular orientation.

FIG. 9 is a schematic view showing the identification code assigning device and the assigning method of the first embodiment. The identification code assigning device of the first embodiment uses a YVO ₄ near-infrared solid-state laser light source, collects near-infrared rays having a wavelength of 1064 nm with a lens, extracts a third harmonic by a wavelength conversion crystal, and is ultraviolet rays having a wavelength of 355 nm. The UV laser light is reflected by the galvano mirror and irradiated at a desired position. The UV laser light reflected by the galvano mirror is converted into linearly polarized UV laser light by the Gran Laser prism, irradiated at a predetermined position of the insulating film 300, and printed by forming fine grooves on the surface of the insulating film 300. To do.

FIG. 10 is a schematic view showing a case where the polarization direction of the linearly polarized UV laser light and the molecular orientation direction of the insulating film coincide with each other. As shown in FIG. 10 (a), when a groove is formed on the surface of the insulating film 300, when a UV laser beam linearly polarized in the same direction as the molecular orientation direction is irradiated, as shown in FIG. 10 (b), UV Even if the laser light can form grooves by sublimation / molecular transfer reaction of only the molecules on the surface of the insulating film 300, the UV laser light penetrates deep into the insulating film 300, resulting in material deterioration of the insulating film 300 and conductor metal. There is a risk that the characteristics of the metallic material will change due to the heat input to the material 301.

FIG. 11 is a schematic view showing a case where the polarization direction of the linearly polarized UV laser light and the molecular orientation direction of the insulating film 300 are orthogonal to each other. As shown in FIG. 11 (a), when a groove is formed on the surface of the insulating film 300, when UV laser light linearly oriented in the direction orthogonal to the molecular orientation direction is irradiated, as shown in FIG. 11 (b), UV Only the molecules on the surface of the insulating film 300 are sublimated by the laser beam and form grooves by the molecular transfer reaction. At this time, since the UV laser light is orthogonal to the molecular orientation direction of the insulating film 300, it cannot be transmitted to the depth of the insulating film 300, so that the material of the insulating film 300 other than the groove is altered or the conductor metal material 301 is entered. It does not cause a change in characteristics due to heat. Therefore, the identification code can be given without adversely affecting the insulating film 300 and the conductor metal material 301. In the first embodiment, the UV laser light linearly oriented in the direction orthogonal to the molecular orientation direction is used, but it is not always necessary to be orthogonal, and if the direction intersects the molecular orientation direction, the insulating film 300 and the coil are correspondingly increased. The adverse effect on itself can be suppressed.

FIG. 12 is a schematic view showing a state of irradiating a linearly polarized UV laser beam orthogonal to the molecular orientation direction of the insulating film. As shown in FIG. 12, the surface of the insulating film 300 is irradiated with the UV laser light linearly polarized in the direction perpendicular to the molecular orientation direction by the Gran Laser prism. Then, a groove corresponding to the recognition pattern of the identification code is formed on the surface of the insulating film 300.

FIG. 13 is a schematic view showing a position where a two-dimensional code is assigned as an identification code to the segment coil of the first embodiment, and FIG. 14 is an enlarged schematic view of a portion where a two-dimensional code is assigned as an identification code to the segment coil of the first embodiment. is there. As shown in FIGS. 13 and 14, the two-dimensional code 200 is formed on the surface of the insulating film 300 by combining a plurality of grooves.

As described above, as a method of irradiating laser light to form identification information, for example, a laser marking method disclosed in Japanese Patent Application Laid-Open No. 2005-346600 is known. In this laser marking method, identification information is formed by melting, burning, or peeling the surface with a laser beam. Further, in the method for forming identification information disclosed in Japanese Patent Application Laid-Open No. 2006-247489, the identification information is displayed by droplets on the surface of the base material, and the identification information is printed by drying the droplets with laser light.

However, when the laser marking method of JP-A-2005-346600 is applied to a very thin substrate such as a film coated on the surface of a structure, the film is punctured by the laser beam. , There is a problem that the function of the membrane is not satisfied.
Further, as in JP-A-2006-247489, when an attempt is made to form identification information by printing, there is a risk that the identification information cannot be identified because it is peeled off or disappears when it comes into contact with another member after printing. ..

Therefore, in the first embodiment, the recognition pattern groove of the identification code is formed on the surface of the insulating film 300 by the UV laser light. As a result, a method for forming the identification information and a method for confirming the identification information, which does not require the thickness of the film in the portion where the identification information is displayed and can suppress the identification information from peeling off or disappearing as much as possible. Can be provided.

As described above, in the first embodiment, the effects listed below can be obtained.
(1) A stator core 12 having a plurality of slots and
A plurality of segment coils 131 on which a two-dimensional code 200, which is identification information, is displayed, are arranged in each slot, and a stator coil 13 is formed by joining the segment coils 131 to each other at the coil end.
It is a stator of a rotary electric machine equipped with.
Therefore, when the segment coil 131 whose quality does not meet the standard is found, the cause of the quality deterioration can be found in the shortest possible time.

(2) The two-dimensional code 200 of the segment coil 131 is displayed on the insulating film 300 (insulating layer) coated on the surface of the segment coil 131. That is, the identification information can be displayed on the surface of the segment coil 131, and the identification information can be easily confirmed.
(3) The identification information of the segment coil 131 is formed as a groove in the insulating film 300. Therefore, it is possible to avoid peeling or disappearing due to contact with other members.
(4) The insulating film 300 is a layer of a polyimide resin or a polyamide resin. Therefore, the molecular arrangement can be arranged in one direction by the extensional orientation phenomenon caused by the linear expansion coefficient of the conductor metal material 301 and the resin material, and the UV laser behind the insulating film 300 by the linearly polarized UV laser light. Identification information can be displayed by processing only the surface of the insulating film 300 without allowing light to reach it.

(5) The identification information of the segment coil 131 is a two-dimensional code 200. Therefore, a lot of information can be recorded in a small space.
(6) The segment coil 131 has a quadrangular cross section. Therefore, the identification information can be displayed on a flat portion, and the displayability and readability of the identification information can be ensured.

(7) A method for manufacturing a stator of a rotary electric machine in which a plurality of metal segment coils 131 are arranged in slots provided in the stator core 12 and the segment coils 131 are joined to each other at the coil end.
A step of displaying identification information on the insulating film 300 of a plurality of segment coils 131 formed into a predetermined shape and having an insulating film 300 (insulating layer) coated on the surface thereof.
A process of determining whether or not the segment coil 131 on which the identification information is displayed satisfies the quality, eliminating the segment coil 131 that does not satisfy the quality, and managing the identification information of the excluded segment coil 131.
A process of arranging a plurality of segment coils 131 satisfying the quality in each slot of the stator core 12 and deforming the tip to a predetermined position, and a process of deforming the tip to a predetermined position.
The process of joining the tip of the segment coil 131 to the tip of another segment coil 131,
including.
Therefore, when the segment coil 131 whose quality does not meet the standard is found, the cause of the quality deterioration can be found in the shortest possible time.

(8) The identification information portion of the segment coil 131 is displayed by forming a groove with a laser. Therefore, it is possible to avoid peeling or disappearing due to contact with other members.
(9) The insulating film 300 is a polyimide resin or a polyamide resin, and the surface of the insulating film 300 is irradiated with UV laser light linearly polarized in a direction different from the axial direction of the segment coil 131 to form a groove. To form. Therefore, it becomes difficult for the UV laser light to reach the depth of the insulating film 300, and the surface of the insulating film 300 can be processed with high accuracy.
(10) The polarization direction of the UV laser light is substantially perpendicular to the axial direction of the segment coil 131. Therefore, the UV laser light does not reach the depth of the insulating film 300, and the surface of the insulating film 300 can be processed with high accuracy.
(11) The UV laser light is an ultraviolet laser and is linearly polarized using a Gran Laser prism. That is, by selecting the polarizing prism according to the transmission wavelength, linearly polarized light can be easily obtained.

(12) A method for managing coil segments 131 used in a rotary electric machine in which a plurality of segment coils 131 are arranged in slots provided in the stator core 12 and the segment coils 131 are joined to each other at the coil end 131a.
Identification information is displayed on each of the segment coils 131 before being joined.
Inspect the quality of the segment coil 131 molded into a predetermined shape and
If the quality deteriorates as a result of the inspection, the cause of the quality deterioration is analyzed based on the identification information.
Therefore, when the segment coil 131 whose quality does not meet the standard is found, the cause of the quality deterioration can be found in the shortest possible time.
(13) Each segment coil 131 before being joined is molded in a plurality of production lines, and the relationship between the identification information and the production line is managed.
When the quality of the segment coil 131 deteriorates, the production line is specified by the identification information. Therefore, it is possible to identify the production line where the defect has occurred.
(14) Each segment coil 131 before being joined is controlled at the time when the work for manufacturing is performed for each identification information.
When the quality of the segment coil 131 deteriorates, the time when the work is performed is specified by the identification information. Therefore, the time when the defect occurs can be specified, and the processing amount and processing conditions associated with the time can be corrected.
(15) When the quality of the segment coil 131 deteriorates, the manufacturing conditions are corrected for the manufacturing equipment based on the result of analyzing the cause of the quality deterioration. Therefore, when the quality deteriorates, the production of the deteriorated product can be suppressed by correcting the processing amount and the processing conditions at any time.

(16) The manufacturing equipment is equipped with a bending machine for the segment coil 131, and corrects the bending amount according to the quality state of the segment coil 131. Therefore, the deterioration of quality due to the bending process by the bending machine can be corrected at any time.
(17) The manufacturing equipment is equipped with a press machine for the segment coil 131, and corrects the press working conditions of the press machine according to the quality state of the segment coil 131. Therefore, the deterioration of the quality of press working by the press machine can be corrected at any time.

[Other Embodiments]
Although the above description has been made based on the embodiments for realizing the present invention, the specific configuration of the present invention is not limited to the embodiments, and there are design changes and the like within a range that does not deviate from the gist of the invention. However, it is included in the present invention.
For example, in the first embodiment, an example applied to a motor that generates torque as a rotary electric machine is shown, but a generator such as an alternator may be used, and a control drive torque applied to a hybrid vehicle or an electric vehicle can be generated. It may be applied to a motor generator.

Further, in the first embodiment, the UV laser light is linearly polarized and a groove is formed in the insulating film 300 to give an identification code, but a printing technique or the like may be used. Specifically, a liquid colored in a color different from the color of the insulating film 300 may be applied and dried to print the identification code. FIG. 15 is an enlarged schematic view of a portion in which a two-dimensional code is added as an identification code to the segment coil of another embodiment. As shown in FIG. 15, an identification code may be given by expressing the two-dimensional code 200 with ink printed in a thin line. The printing method may be simply sprayed with ink and naturally dried, or may be sprayed with UV ink and cured by ultraviolet irradiation, and is not particularly limited.

(18) The identification information portion of the segment coil 131 is colored differently from other parts of the insulating layer 300. Therefore, since it is colored in a color different from that of other parts, the recognition accuracy of the identification information can be improved.
(19) The identification information portion of the segment coil is displayed by applying a colored liquid and drying it. Therefore, the identification information can be given by a simpler device as compared with the first embodiment.

1 Rotating electric machine 10 Rotor 11 stator 12 stator core 13 stator coil 131 segment coil 131a coil end 200 two-dimensional code 300 insulating film 301 conductor metal material

Claims (19)

A stator core with multiple slots and
A plurality of segment coils, each of which has identification information displayed, are arranged in the respective slots, and a stator coil formed by joining the segment coils to each other at the coil end, and a stator coil.
Rotating electric machine stator equipped with. The stator of a rotary electric machine according to claim 1, wherein the identification information of the segment coil is displayed on an insulating layer coated on the surface of the segment coil. The stator of a rotary electric machine according to claim 2, wherein the identification information of the segment coil is formed as a groove in the insulating layer. The stator of a rotary electric machine according to claim 2, wherein the identification information portion of the segment coil is colored on another portion of the insulating layer. The stator of a rotary electric machine according to claim 2, wherein the insulating layer is a polyimide resin or a polyamide resin layer. The stator of a rotary electric machine according to claim 1, wherein the identification information of the segment coil is a two-dimensional code. The stator of a rotary electric machine according to claim 1, wherein the segment coil has a quadrangular cross section. A method for manufacturing a stator of a rotary electric machine in which a plurality of metal segment coils are arranged in slots provided in a stator core and the segment coils are joined to each other at a coil end.
A step of displaying identification information on the insulating layer of a plurality of the segment coils formed into a predetermined shape and having an insulating layer coated on the surface thereof.
A step of determining whether or not the segment coil on which the identification information is displayed satisfies the quality, excluding the segment coil that does not satisfy the quality, and managing the identification information of the excluded segment coil. ,
A step of arranging a plurality of the segment coils satisfying the quality in each slot of the stator core and deforming the tip to a predetermined position.
The step of joining the tip of the segment coil to the tip of another segment coil,
A method for manufacturing a stator of a rotary electric machine, which comprises. The method for manufacturing a stator of a rotary electric machine according to claim 8, wherein the identification information portion of the segment coil is coated with a colored liquid, dried and displayed. The method for manufacturing a stator of a rotary electric machine according to claim 8, wherein the identification information portion of the segment coil is displayed by forming a groove with a laser. The insulating layer is a polyimide resin or a polyamide resin, and a groove is formed on the surface of the resin layer by irradiating the surface of the resin layer with the laser linearly polarized in a direction different from the axial direction of the segment coil. The method for manufacturing a stator of a rotary electric machine according to claim 10. The method for manufacturing a stator of a rotary electric machine according to claim 11, wherein the polarization direction of the laser is substantially perpendicular to the axial direction of the segment coil. The method for manufacturing a stator of a rotary electric machine according to claim 10, wherein the laser is an ultraviolet laser and is linearly polarized using a prism. A method for managing coil segments used in a rotary electric machine in which a plurality of segment coils are arranged in slots provided in a stator core and the segment coils are joined to each other at a coil end.
Identification information is displayed on each of the segment coils before they are joined.
Inspect the quality of the segment coil molded into a predetermined shape and
A method for managing a segment coil used in a rotary electric machine, which comprises analyzing the cause of the quality deterioration based on the identification information when the quality deteriorates as a result of the inspection. Each of the segment coils before being joined is molded in a plurality of production lines, and the relationship between the identification information and the production lines is managed.
The method for managing a segment coil used in a rotary electric machine according to claim 14, wherein when the quality of the segment coil deteriorates, the production line is specified by the identification information. For each of the segment coils before being joined, the time when the work for manufacturing is performed is controlled for each of the identification information.
The method for managing a segment coil used in a rotary electric machine according to claim 14, wherein when the quality of the segment coil deteriorates, the time when the work is performed is specified by the identification information. The segment used for a rotary electric machine according to claim 14, wherein when the quality of the segment coil deteriorates, the manufacturing conditions are corrected for the manufacturing equipment based on the result of analyzing the cause of the quality deterioration. How to manage the coil. The segment coil used in the rotary electric machine according to claim 17, wherein the manufacturing equipment includes a folding machine for the segment coil, and corrects the bending amount according to the quality state of the segment coil. Management method. The manufacturing equipment is used for the rotary electric machine according to claim 17, further comprising a press machine for the segment coil and correcting the press working conditions of the press machine according to the quality state of the segment coil. How to manage segment coils.

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