WO2020031612A1 - Stator pour machine électrique tournante, et procédé de fabrication pour celui-ci - Google Patents

Stator pour machine électrique tournante, et procédé de fabrication pour celui-ci Download PDF

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Publication number
WO2020031612A1
WO2020031612A1 PCT/JP2019/027638 JP2019027638W WO2020031612A1 WO 2020031612 A1 WO2020031612 A1 WO 2020031612A1 JP 2019027638 W JP2019027638 W JP 2019027638W WO 2020031612 A1 WO2020031612 A1 WO 2020031612A1
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Prior art keywords
stator
weld
welding
segment
electric machine
Prior art date
Application number
PCT/JP2019/027638
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English (en)
Japanese (ja)
Inventor
中山　健一
堀　俊夫
博光 岡本
雄貴 荒井
雄志 金野
佐藤　俊一郎
Original Assignee
日立オートモティブシステムズ株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 日立オートモティブシステムズ株式会社 filed Critical 日立オートモティブシステムズ株式会社
Priority to JP2020536403A priority Critical patent/JP7061194B2/ja
Publication of WO2020031612A1 publication Critical patent/WO2020031612A1/fr

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/04—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of windings, prior to mounting into machines
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/10—Applying solid insulation to windings, stators or rotors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/32—Windings characterised by the shape, form or construction of the insulation
    • H02K3/34—Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/46—Fastening of windings on the stator or rotor structure
    • H02K3/50—Fastening of winding heads, equalising connectors, or connections thereto

Definitions

  • the present invention relates to a stator for a rotating electric machine and a method for manufacturing the stator.
  • the rotating electric machine generates a rotating magnetic field by supplying AC power to the stator coil, and can rotate the rotor with the rotating magnetic field. Further, it is also possible to convert mechanical energy applied to the rotor into electric energy and output AC power from the coil. Thus, the rotating electric machine operates as a motor or a generator.
  • Patent Literature 1 Japanese Patent Application Laid-Open No. 2011-54263 discloses that a molten portion formed by melting a tip portion of an end portion of a pair of conductor segments is solidified while urging the melted portion to one side in a circumferential direction, thereby forming a fusion mark, that is, joining A rotating electric machine is described in which an end is formed so as to be bulged to one side in a circumferential direction.
  • Patent Document 2 International Publication No. 2013/99001 discloses a segment coil and a segment coil formed by bending a rectangular conductor to provide a rotating electric machine that realizes downsizing of the rotating electric machine and improvement of weldability.
  • a rotating electric machine having a stator core having a slot into which the stator coil is inserted, a welded portion formed at the tip of a lead portion of a segment coil that is projected and twisted from an end face of the stator core is formed in a radial direction of the stator.
  • At least one of the welding balls arranged in a circle is a long ellipsoid that is long in the radial direction of the stator core, and the angle formed by the longitudinal direction of the long ellipsoid and the axial direction of the stator core includes the central axis of the stator core.
  • a fire IT year electric machine with a core cut surface shape smaller than 90 degrees is described.
  • Patent Document 3 Japanese Patent Application Laid-Open No. 2016-93027 discloses that, in a rotating electrical machine stator including a stator coil and a plurality of caps formed of an insulating material, the stator coil has a plurality of radial positions at a plurality of circumferential positions at a coil end. And has a plurality of joints each of which is a joint of a conductor. Each cap has two side walls extending radially away from each other in the circumferential direction, and a connecting part connecting one end in the radial direction, and both ends in the vertical direction and the other end in the radial direction are opened.
  • the plurality of caps accommodate at least a portion of the joining portion at one end in the radial direction of the plurality of joining portions at least at a portion of the joining portion at the other end in the radial direction at a plurality of positions in the circumferential direction of the coil end.
  • a rotating electric machine stator to which a resin is adhered is described.
  • Patent Document 4 Japanese Patent Application Laid-Open No. 2014-50207 has a stator core in which a plurality of slots arranged in a circumferential direction are formed, and a stator coil inserted into the slots of the stator core.
  • the stator coil has a substantially U-shaped conductor having a rectangular cross section.
  • a plurality of segment coils comprising a plurality of segment coils connected to each other, the segment coil has a connection portion connected to another segment coil at an end, and the rotating portion has a connection portion having a corner portion. ing.
  • JP 2011-54263 A International Publication 2013/99001 JP 2016-93027 A JP 2014-50207 A
  • the formed segment coil is welded at the coil end to form a stator coil.
  • the welded portion of the segment coil expands due to heat and generates stress due to a temperature change. Therefore, there is a problem that the welded portion of the segment coil is broken, the coil is disconnected, and the operation of the rotating electric machine becomes incomplete.
  • the present application includes a plurality of means for solving the above-described problems.
  • a stator for a rotating electric machine in which a plurality of slots that are opened in the radial direction are formed in the circumferential direction, is provided.
  • Each of the plurality of segment coils includes an end portion of each of the plurality of segment coils exposed to the outside of the slot.
  • a plurality of welds that connect adjacent segment coils, and an insulating covering portion that covers the plurality of welds and connects the welds in a radial direction of the stator.
  • At least one of the welded portions has a protruding portion that protrudes from the side surface of the segment coil to the radially inner side or outer side.
  • the rigidity of the weld can be improved. Problems, configurations, and effects other than those described above will be clarified by the following description of the embodiments.
  • FIG. 1 is a schematic diagram illustrating an entire configuration of a rotating electric machine according to an embodiment of the present invention. It is a perspective view showing the stator of the rotary electric machine concerning the embodiment of the present invention. It is a perspective view of a stator core. It is a perspective view of the coil end after welding. It is a side view of the coil end after welding. It is a top view of the coil end after welding. It is a perspective view of the coil end after bridge
  • the rotating electric machine according to the present embodiment is a rotating electric machine suitable for use in running an automobile.
  • a so-called electric vehicle using a rotating electric machine includes a hybrid electric vehicle (HEV) having both an engine and a rotating electric machine, and a pure electric vehicle (EV) running only on the rotating electric machine without using an engine.
  • HEV hybrid electric vehicle
  • EV pure electric vehicle
  • the rotating electric machine described below can be used for both types.
  • FIG. 1 is a schematic diagram showing the entire configuration of a rotating electric machine 100 according to an embodiment of the present invention.
  • FIG. 1 shows the inside of the rotating electric machine 100 with a part of the rotating electric machine 100 being a cross section.
  • the rotating electric machine 100 is provided inside the case 10 and includes a housing 112, a stator 130 having a stator core 132 fixed to the housing 112, and a rotor 150 rotatably disposed in the stator 130.
  • the case 10 may be constituted by an engine case or a transmission case.
  • the rotating electric machine 100 is a three-phase synchronous motor with a built-in permanent magnet.
  • a three-phase synchronous motor will be described as an example of the rotating electric machine 100, but the present invention can be applied to an induction motor.
  • the rotating electric machine 100 operates as a motor for rotating the rotor 150 by supplying a three-phase alternating current to the stator coil 138 wound around the stator core 132. Also, when driven by the engine, the rotating electric machine 100 operates as a generator and outputs three-phase alternating current generated power. That is, the rotating electric machine 100 has both a function as an electric motor that generates a rotating torque based on electric energy and a function as a generator that generates electric power based on mechanical energy. Features can be used selectively.
  • the stator 130 is fixed to the housing 112.
  • the stator 130 is fixed and held in the case 10 by fastening the flange 115 provided on the housing 112 to the case 10 with bolts 12.
  • the rotor 150 fixed to the rotating shaft 118 is supported by bearings 14A and 14B of the case 10, and is rotatably held inside the stator core 132.
  • FIG. 2 is a perspective view showing the stator 130 attached to the housing 112
  • FIG. 3 is a perspective view of the stator core 132.
  • the housing 112 is formed in a cylindrical shape by drawing a steel plate (such as a high-tensile steel plate) having a thickness of about 2 to 5 mm.
  • a flange 115 is provided at one axial end of the housing 112, and is fixed to the case 10 with bolts as described above (see FIG. 1).
  • the flange 115 is formed integrally with the housing 112 by drawing. Note that the stator 130 may be directly fixed to the case 10 without providing the housing 112.
  • the stator 130 is fixed to the inner peripheral side of the housing 112 and has a cylindrical stator core 132 and a stator coil 138 mounted on the stator core 132.
  • the stator core 132 is formed, for example, by laminating a plurality of electromagnetic steel sheets 133 having a thickness of about 0.05 to 1.0 mm and formed by punching or etching.
  • the laminated electromagnetic steel plates 133 are connected and fixed by welding, and the deformation of the electromagnetic steel plates 133 caused by the tightening force when pressed into the housing 112 is suppressed.
  • a plurality of slots 420 extending in the axial direction are formed at equal intervals in the circumferential direction in the stator core 132.
  • the number of slots 420 is, for example, 72 in the present embodiment.
  • the slots 420 accommodate the stator coils 138 as shown in FIG.
  • the slot 420 is an open slot, and an opening is formed on the inner peripheral side of the stator core 132.
  • the width of the opening in the circumferential direction is preferably substantially equal to or slightly smaller than the coil mounting portion of each slot 420 in which the stator coil 138 is mounted.
  • an insulating paper (so-called slot liner) 300 is arranged.
  • the insulating paper 300 is, for example, an insulating sheet of heat-resistant polyamide paper, and has a thickness of about 0.1 to 0.5 mm.
  • the insulating paper 300 is provided in the slot 420 and the coil ends 140a and 140b. By disposing the insulating paper 300 in the slot 420, the insulating paper 300 is disposed between the coils inserted into the slot 420, and between the coil and the inner surface of the slot 420. The withstand voltage during the period has been improved.
  • the stator coil 138 is formed by connecting a plurality of U-shaped segment coils 28 (see FIGS. 4 and 7) to each other.
  • the segment coil 28 is arranged such that one end thereof is adjacent to another segment coil 28 so that the end thereof is exposed from the slot 420 (that is, the stator 130), and the other end is formed of another segment coil. It is arranged adjacent to the coil 28.
  • the segment coils 28 having adjacent ends are connected to each other at adjacent ends to form a stator coil 138 wound around the stator core 132.
  • the insulating paper 300 provided on the coil ends 140a and 140b is annularly provided between the coils for inter-phase insulation and inter-conductor insulation at the coil ends 140a and 140b. As described above, in the rotating electric machine 100 of the present embodiment, since the insulating paper 300 is provided inside the slot 420 and on the coil ends 140a and 140b, even if the insulating film 600 of the coil is damaged or deteriorated, The required withstand voltage can be maintained.
  • the teeth 430 are formed between the slots 420, and each tooth 430 is formed integrally with the annular core back 440.
  • the stator core 132 is an integrated core in which the teeth 430 and the core back 440 are integrally formed.
  • the teeth 430 guide the rotating magnetic field generated by the stator coil 138 to the rotor 150 and cause the rotor 150 to generate a rotating torque.
  • Rotor 150 has rotor core 152 and permanent magnet 154 held in a magnet insertion hole formed in rotor core 152.
  • a rectangular parallelepiped magnet insertion hole is formed in the rotor core 152 at regular intervals in the circumferential direction near the outer peripheral portion.
  • a permanent magnet 154 is embedded in each magnet insertion hole and fixed with an adhesive or the like.
  • the circumferential width of the magnet insertion hole is formed larger than the circumferential width of the permanent magnet 154, and magnetic gaps 156 are formed on both sides of the permanent magnet 154.
  • the magnetic gap 156 may be filled with an adhesive or may be solidified with the permanent magnet 154 with resin.
  • the permanent magnet 154 forms the field pole of the rotor 150.
  • one magnetic pole is formed by one permanent magnet 154, but one magnetic pole may be formed by a plurality of permanent magnets. By increasing the number of permanent magnets for forming each magnetic pole to a plurality, the magnetic flux density of each magnetic pole generated by the permanent magnet increases, and the magnet torque can be increased.
  • a neodymium-based or samarium-based sintered magnet, a ferrite magnet, a neodymium-based bonded magnet, or the like can be used. Desirably, a neodymium magnet is more suitable.
  • An auxiliary magnetic pole may be formed between each permanent magnet 154.
  • FIG. 4 is a perspective view of the coil end 140b after welding
  • FIG. 5 is a side view after welding
  • FIG. 7 is a plan view of the coil end 140b viewed from the end face direction
  • FIG. 7 is a perspective view after the bridge 40 is formed
  • FIG. 8 is a side view after the bridge 40 is formed.
  • each slot 420 eight segment coils 28 are arranged in each slot 420. As shown in FIG. 4, the ends of two adjacent segment coils 28 are welded and connected, and the coil end 140b is It is configured. For example, the base material of the copper wire forming the segment coil 28 is melted by arc welding such as TIG (Tungsten Inert Gas) welding, plasma welding, laser welding, or the like to form a welded portion 30, and the end of the segment coil 28 is formed. Connect.
  • TIG Transmission Inert Gas
  • the welded portion 30 is provided with a concave portion 32 on a radial side surface of the segment coil 28 on a surface perpendicular to the rotating shaft 118.
  • the ends of the adjacent segment coils 28 are arranged such that a gap 29 is provided by the thickness of the coating or the insulating paper 300, and a recess 32 is provided at the position of the gap 29.
  • the welding portion 30 includes a first welding portion 34A formed at an end of the first segment coil 28, and a second segment coil disposed adjacent to the first segment coil 28.
  • a second welded portion 34B formed at an end of the stator 28, and a recess 32 having a smaller width in the radial direction of the stator 130 than at least one of the first welded portion 34A and the second welded portion 34B is formed.
  • a third welded portion 34C is provided between the first welded portion 34A and the second welded portion 34B.
  • the heating state of the copper surface solidified after melting in the welding portion 30 changes with the movement of the welding electrode 50, the color of the surface of the welding portion 30 is not uniform as shown in FIG. There is no gradation. As described above, the surface of the welded portion 30 becomes gradation, so that light reflection can be suppressed from a single color having metallic luster, and the protrusion 31 can be easily detected by image recognition.
  • the side where wrinkles 33 described later are formed has a dark color, and the side where the wrinkles 33 are not formed has a bright color.
  • the welded portion 30 has a protruding portion 31 that protrudes from the side surface of the segment coil 28 in one of the radial directions (the outer circumferential direction or the inner circumferential direction) of the stator 130. That is, the projecting portion 31 is provided on the welding portion 30 such that the center of gravity of the plurality of segment coils 28 to be connected before welding differs from the position of the center of gravity of the projecting portion 31.
  • the distance between the adjacent segment coils 28 can be kept constant, and the insulation performance of the coil deteriorates due to the variation in the shape and size of the welded portion 30. Can be suppressed.
  • the projecting portion 31 by forming the projecting portion 31 into a fixed shape and size, the distance between the adjacent welding portions 30 becomes constant, and the supply amount of the synthetic resin material for forming the bridging portion 40 described later is reduced. There is no need to control by the distance between the 30, and the bridge portion 40 can be formed easily and reliably.
  • the welding of the coil is performed by moving the welding electrode 50 to which the voltage is applied from the inner peripheral side to the outer peripheral side to melt the copper of the coil end 140b and move the molten copper.
  • the protruding portion 31 is formed by solidifying while being pulled by 50.
  • the shape and size of the formed protrusion 31 can be controlled by controlling the moving speed and current (temperature) of the welding electrode 50.
  • the movement of the welding electrode 50 may be, for example, only one direction from the inner circumference to the outer circumference, and the ends of the segment coils 28 may be sequentially welded from the inner circumference to the outer circumference. By doing so, all the protruding portions 31 are formed so as to protrude in the outer peripheral direction, and a clearance when inserting the rotor 150 into the stator 130 can be secured.
  • the movement of the welding electrode 50 during welding may be changed alternately for each row as shown in FIG. In this way, in the welded portion 30, the first welding row (row 1, row 3) whose center of gravity is formed toward the inner peripheral side and the second welding row (row 3) formed toward the outer peripheral side are formed. Column 2) is formed.
  • the direction of movement of the welding electrode 50 it is necessary to move the welding electrode 50 from the outer peripheral side to the initial position on the inner peripheral side or from the inner peripheral side to the initial position on the outer peripheral side. And welding can be performed efficiently, and the time required for welding can be reduced.
  • wrinkles 33 extending in the circumferential direction of the stator 130 are formed in the welding portion 30 on the moving direction side of the welding electrode 50 during welding.
  • a plurality of wrinkles 33 are preferably formed in the radial direction of the stator 130. Due to the wrinkles 33, the surface area of the welded portion 30, that is, the area where the end of the segment coil 28 comes into contact with the cooling oil increases, and the cooling effect by the cooling oil can be improved.
  • the wire rods of the adjacent segment coils 28 are arranged in parallel, and a gap 29 is provided between the copper of the base material at the coil end by the thickness of the coating or the insulating paper 300,
  • the welding portion 30 of the present embodiment moves so that the welding electrode 50 moves over the gap 29 together with the molten copper, and the welding portion 30 in which the molten copper is solidified is also formed on the gap 29.
  • the segment coil 28 is bent so that the ends come into contact with each other (see, for example, FIG. 13 of Patent Document 4 and JP-A-2014-50207). In this embodiment, as shown in FIG.
  • the segment coil 28 can be moved without contacting the ends of the segment coil 28. Can be reliably connected by welding. Further, since there is no need to bend the segment coil 28, adjacent coils do not come close to each other, so that appropriate insulation can be maintained.
  • the coil end 140b After connecting the segment coils 28 by welding, the coil end 140b performs coating so as to connect the plurality of welded portions 30 to form the bridge portions 40, as shown in FIGS.
  • FIG. 8 the inside of the bridging portion 40 is shown so that the structure of the bridging portion 40 can be easily understood.
  • the bridge portion 40 forms a coating of a synthetic resin in the radial direction of the stator 130 such that the coil ends 140b of the coils in the same slot 420 are integrated.
  • the crosslinked portion 40 may be formed by powder coating.
  • the crosslinked portion 40 may be formed by applying an insulating varnish.
  • the bridging portion 40 may be constituted by an insulating tube or an insulating cap.
  • the bridging portion 40 functioning as an insulating coating covering the welded portion 30 so as to connect the adjacent welded portions 30 in the radial direction, the stress generated in the welded portion 30 can be dispersed, and the temperature change of the welded portion 30 Deformation and breakage (for example, breakage of the coil) can be suppressed.
  • the interval between the welded portions 30 can be made constant, the supply amount of the synthetic resin material for forming the bridged portion 40 becomes constant, and the formation of the bridged portion 40 can be achieved.
  • the bridging portion 40 may be formed without providing the protruding portion 31 in the welding portion 30.
  • the bridge portion 40 may be connected in the circumferential direction on the inner peripheral side of the stator 130. For this reason, all the welds 30 are integrally connected in a spoke shape, and the strength of the welds 30 can be further improved, and the occurrence of cracks and the like can be prevented.
  • Cooling oil flows around the welded portion 30, and flows from the outer peripheral side to the inner peripheral side (or from the inner peripheral side to the outer peripheral side) along the bridge portion 40, and the cooling oil flows through the welded portion 30.
  • the cooling effect can be improved without escaping at the cut.
  • the bridge portion 40 is formed so as to be coupled to the stator core 132, the cooling oil flowing along the bridge portion 40 does not flow into the stator core 132, and the welded portion 30 can be reliably cooled. .
  • the protrusions 31 may be provided in all the welds 30 of the coils arranged in the same slot 420 (that is, the coil ends are arranged in the radial direction of the stator 130), but some of the protrusions 31 may be provided. It may be provided only in the welding portion 30.
  • the protruding portion 31 may be provided on the welded portion 30 excluding both ends. That is, as shown in FIG. 11, the inner weld portion 30A provided on the innermost periphery of the stator and the outer weld portion 30D provided on the outermost periphery are not provided with the protruding portion 31, and the inner weld portion 30A and the outer weld portion 30A are not provided.
  • the projecting portion 31 may be provided in the middle welded portions 30B and 30C between the portion 30D.
  • the inner welding portion 30A provided on the innermost periphery of the stator and the outer welding portion 30D provided on the outermost periphery are provided with a projecting portion 31 having a small amount of projection, and the inner welding portion 30A and the outer welding portion 30D A projecting portion 31 having a large projecting amount may be provided between the middle welded portions 30B and 30C.
  • the moving speed and heat conditions of the welding electrode 50 may change at the positions of the welded portions 30 on both the inner and outer circumferential sides, and the projecting portion 31 may vary in shape and size.
  • a protrusion 31 may be provided on the welded portion 30 of the coil except for both ends, which is arranged in the radial direction of the stator 130.
  • the jigs 60A and 60B are provided on the inner peripheral side and the outer peripheral side of the coil, so that the inner peripheral side and the outer peripheral side are provided.
  • the moving speed and the heat condition of the welding electrode 50 can be made the same at the welding portions 30 at both ends on the side as well as at the welding portions 30 at the other ends.
  • the jigs 60A and 60B may be made of the same material as the end of the segment coil 28 and may be melted similarly to the end of the coil segment 28, and preferably have the same heat capacity. For this reason, at the positions of the welded portions 30 at both ends on the inner peripheral side and the outer peripheral side, the protrusions 31 having the same shape can be formed in all the welded portions 30 without changing the speed and heat conditions of the welding electrode 50.
  • the jigs 60A and 60B may be disposed on both the inner peripheral side and the outer peripheral side, or may be disposed on one side. Particularly, since the segment coil 28 is close to the stator core 132 on the outer peripheral side, The contact between the coil and the stator core 132 may be suppressed by suppressing the amount of protrusion of the protrusion 31 of the outermost welded portion 30 (or without forming the protrusion 31).
  • three or more segment coils 28 can be connected by welding.
  • four coil ends 140b of the coils 1 to 4 are connected by welding, and four coil ends 140b of the coils 5 to 8 are connected by welding.
  • the welding electrode 50 is moved in the radial direction of the stator 130 near the end of the segment coil 28, by adjusting the interval at which the coils to be connected by welding are arranged, The above segment coils 28 can be connected.
  • segment coils 28 arranged at an interval of a half of the length of the projecting portion 31 projecting in the radial direction are connected to the adjacent segment coil 28 by the projecting portion 31.
  • segment coils 28 arranged at intervals of twice the length of the projecting portion 31 projecting in the radial direction are not connected to the adjacent segment coils 28, and the insulation determined by the distance is maintained. .
  • the segment coils 28 are arranged in the slots 420 (first step).
  • the welding of the coil moves the welding electrode 50 to which the voltage is applied from the inner peripheral side to the outer peripheral side to melt the copper at the end of the segment coil 28, and the molten copper moves.
  • the protruding portion 31 is formed by solidifying while being pulled by the welding electrode 50 (second step). By controlling the moving speed and the current (temperature) of the welding electrode 50, the shape and size of the formed protrusion 31 can be controlled.
  • the shield gas argon, helium, a mixed gas of argon and helium, or the like may be used.
  • the movement of the welding electrode 50 may be, for example, only one direction from the inner peripheral side to the outer peripheral side. Further, the movement direction of the welding electrode 50 may be changed alternately for each row as shown in FIG. Specifically, in row 1, a first row welding step of moving and welding the welding electrode 50 from the outer peripheral side to the inner peripheral side is performed. Next, in the row 2 adjacent to the row 1, a second row welding process is performed in which the welding electrode 50 is moved from the inner circumference side, which is the opposite direction, to the outer circumference side to perform welding. Next, in the row 3 adjacent to the row 2, a first row welding step is performed in which the welding electrode 50 is moved and welded from the outer peripheral side to the inner peripheral side, which is the opposite direction.
  • the projection 31 formed on the welded portion 30 in the first row welding process and the projection 31 formed on the welded portion 30 in the second row welding process are opposite in the radial direction of the stator 130. It is formed to protrude.
  • the bridge portion 40 is formed by forming a coating of a synthetic resin in the radial direction of the stator 130 such that the coil ends 140b of the coils of the same slot 420 are integrated.
  • the crosslinked portion 40 may be formed by powder coating.
  • the crosslinked portion 40 may be formed by applying an insulating varnish.
  • the bridging portion 40 may be constituted by an insulating tube or an insulating cap.
  • the welding electrode 50 is positioned on the opposite side of the coil from the start position, which is the position of the jig 60A on the inner or outer circumference side of the coil. It moves to the end position which is the position of the tool 60B.
  • the moving speed and the heat condition of the welding electrode 50 can be made the same at the welded portions 30 at both ends on the inner peripheral side and the outer peripheral side as with the welded sections 30 at the other ends.
  • the jigs 60A and 60B may be made of the same material as the end of the segment coil 28, and preferably have the same heat capacity.
  • the speed and heat conditions of the welding electrode 50 do not change at the positions of the welding portions 30 at both ends on the inner peripheral side and the outer peripheral side. 31 can be formed.
  • the present invention is not limited to the embodiments described above, but includes various modifications and equivalent configurations within the spirit of the appended claims.
  • the above-described embodiments have been described in detail for easy understanding of the present invention, and the present invention is not necessarily limited to those having all the configurations described above.
  • a part of the configuration of one embodiment may be replaced with the configuration of another embodiment.
  • the configuration of one embodiment may be added to the configuration of another embodiment.
  • another configuration may be added, deleted, or replaced.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacture Of Motors, Generators (AREA)
  • Insulation, Fastening Of Motor, Generator Windings (AREA)
  • Windings For Motors And Generators (AREA)

Abstract

La présente invention vise à améliorer la rigidité d'une partie soudée. A cet effet, l'invention porte sur un stator pour une machine dynamo-électrique, lequel stator comprend : un noyau de stator pour lequel une pluralité de fentes à ouverture radiale sont formées, alignées dans la direction périphérique ; et une pluralité d'enroulements segmentés disposés dans la direction radiale du stator à l'intérieur des fentes. La pluralité d'enroulements segmentés comprennent : une pluralité de parties soudées formées sur les parties d'extrémité respectives de la pluralité d'enroulements segmentés exposées à l'extérieur des fentes, les parties soudées reliant des enroulements segmentés adjacents ; et une partie de revêtement isolant qui revêt la pluralité de parties soudées, et qui relie les parties soudées dans la direction radiale du stator. Sur au moins plusieurs de la pluralité de parties soudées est formée une partie saillante qui fait saillie vers le côté périphérique radialement interne ou le côté périphérique externe à partir de la surface latérale de l'enroulement segmenté.
PCT/JP2019/027638 2018-08-09 2019-07-12 Stator pour machine électrique tournante, et procédé de fabrication pour celui-ci WO2020031612A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2020536403A JP7061194B2 (ja) 2018-08-09 2019-07-12 回転電機の固定子及びその製造方法

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JP2018150669 2018-08-09
JP2018-150669 2018-08-09

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WO2020031612A1 true WO2020031612A1 (fr) 2020-02-13

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Cited By (3)

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JP2021184659A (ja) * 2020-05-21 2021-12-02 ダイキン工業株式会社 回転電気機械およびその製造方法
JP2022049171A (ja) * 2020-09-16 2022-03-29 株式会社日立製作所 回転電機および回転電機の製造方法
WO2024162341A1 (fr) * 2023-01-31 2024-08-08 古河電気工業株式会社 Appareil de soudage laser et procédé de soudage laser

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JP2008154433A (ja) * 2006-12-20 2008-07-03 Denso Corp 回転電機の巻線接合方法
JP2011142747A (ja) * 2010-01-07 2011-07-21 Denso Corp 回転電機の固定子及びその製造方法
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JP2021184659A (ja) * 2020-05-21 2021-12-02 ダイキン工業株式会社 回転電気機械およびその製造方法
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WO2024162341A1 (fr) * 2023-01-31 2024-08-08 古河電気工業株式会社 Appareil de soudage laser et procédé de soudage laser

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