WO2020044753A1 - Procédé permettant de fabriquer des stators - Google Patents

Procédé permettant de fabriquer des stators Download PDF

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Publication number
WO2020044753A1
WO2020044753A1 PCT/JP2019/025033 JP2019025033W WO2020044753A1 WO 2020044753 A1 WO2020044753 A1 WO 2020044753A1 JP 2019025033 W JP2019025033 W JP 2019025033W WO 2020044753 A1 WO2020044753 A1 WO 2020044753A1
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WIPO (PCT)
Prior art keywords
coil
bundle
stator
coil bundle
annular
Prior art date
Application number
PCT/JP2019/025033
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English (en)
Japanese (ja)
Inventor
丹下　宏司
Original Assignee
日本電産株式会社
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 日本電産株式会社 filed Critical 日本電産株式会社
Priority to CN201980055000.2A priority Critical patent/CN112585851A/zh
Publication of WO2020044753A1 publication Critical patent/WO2020044753A1/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
    • H02K15/06—Embedding prefabricated windings in machines

Definitions

  • the present invention relates to a method for manufacturing a stator.
  • Patent Document 1 discloses a method for manufacturing a stator in which an annular coil bundle is inserted into a stator core in an axial direction.
  • the coil end becomes long, and it may be necessary to process the coil end.
  • the present invention has been made in view of the above problems, and provides a method for manufacturing a stator that can reduce a coil end length.
  • a method for manufacturing a stator includes a bending step of bending one side of an annular coil bundle in which a coil is wound at least a plurality of times; And an insertion step of inserting the slot into the annular coil bundle by bending one side of the annular coil bundle in the bending step.
  • the length of the passage portion in the direction perpendicular to the insertion direction and the bundle direction of the annular coil bundle is smaller than the opening width of the slot open, and in the bending step, the passage portion is compressed after bending the annular coil. I do.
  • the coil end length can be reduced.
  • FIG. 1 is a sectional view of a section perpendicular to the axial direction of the stator.
  • FIG. 2A is a schematic view of the annular coil bundle.
  • FIG. 2B is a schematic view of a bent coil bundle.
  • FIG. 3 is a schematic diagram of a winding type.
  • FIG. 4 is a flowchart of the stator manufacturing process.
  • FIG. 5 is a schematic view showing a coil winding step.
  • FIG. 6 is a schematic view showing the insulating paper winding step.
  • FIG. 7 is a schematic diagram showing a compression step.
  • FIG. 8 is a schematic view showing a bending step.
  • FIG. 9 is a schematic view showing a compression step.
  • FIG. 10 is another schematic view showing the compression step.
  • FIG. 1 is a sectional view of a section perpendicular to the axial direction of the stator.
  • FIG. 2A is a schematic view of the annular coil bundle.
  • FIG. 2B is
  • FIG. 11 is a schematic view showing a bending step.
  • FIG. 12 is a schematic diagram illustrating the compression step.
  • FIG. 13 is a schematic view showing a bending step.
  • FIG. 14 is a schematic diagram showing a compression step.
  • FIG. 15A is a schematic view showing the progress of the insertion step.
  • FIG. 15B is a schematic view showing the progress of the insertion step.
  • FIG. 15C is a schematic view showing the progress of the insertion step.
  • FIG. 16 is a schematic diagram showing the restoration step.
  • FIG. 17A is a schematic view of the annular coil bundle according to the second embodiment.
  • FIG. 17B is a schematic view of the bent coil bundle according to the second embodiment.
  • FIG. 18 is a schematic diagram of a winding type according to the second embodiment.
  • FIG. 17A is a schematic view of the annular coil bundle according to the second embodiment.
  • FIG. 17B is a schematic view of the bent coil bundle according to the second embodiment.
  • FIG. 19 is a flowchart of a stator manufacturing process according to the second embodiment.
  • FIG. 20 is a schematic diagram illustrating a coil winding step according to the second embodiment.
  • FIG. 21 is a schematic diagram illustrating a bending step according to the second embodiment.
  • FIG. 22 is a schematic diagram illustrating an insertion step according to the second embodiment.
  • the sectional area of the copper (or aluminum) of the coil excluding the coating with respect to the sectional area of the slot of the stator core excluding the insulating paper. is defined as the “occupancy rate”.
  • the direction in which the central axis of the stator 100 extends is referred to as “axial direction” unless otherwise specified.
  • One side along the axial direction is defined as an upper side, and the other side is defined as a lower side.
  • the direction orthogonal to the central axis of the stator 100 is referred to as “radial direction”.
  • One side along the radial direction is the inside, and the other side is the outside.
  • a direction along an arc around the center axis of the stator 100 is referred to as a “circumferential direction”.
  • the reference determined in the axial direction, the radial direction, and the circumferential direction is referred to as “stator reference”.
  • FIG. 1 shows the stator 100 in a cross-sectional view of a cross section perpendicular to the axial direction.
  • the stator 100 is a component of the motor, and generates a rotational torque by interacting with a rotor (not shown).
  • the stator 100 includes a coil 10, a stator core 20, and insulating paper 30.
  • the stator 100 of the present embodiment is a distributed winding in which the coil 10 is wound over several slots 21.
  • the stator core 20 is formed in a hollow cylindrical shape. Stator core 20 is formed by stacking thin silicon steel plates. A plurality of slots 21 are formed radially in the stator core 20. The slot 21 is formed with a slot open 22 that opens radially inward.
  • the stator core 20 of the present embodiment is an integrated stator core.
  • Coil 10 is housed in slot 21 by aligned winding. In the aligned winding, the coils 10 are regularly stacked in a predetermined direction.
  • the coil 10 of the present embodiment is regularly stacked in the slot 21 in the circumferential direction, but is not limited to this. Further, the coil 10 of the present embodiment is a round wire, but is not limited to this.
  • the insulating paper 30 is wound around the outer periphery of the alignment portion Pa including the plurality of coils 10 inserted into the slots 21. Details of the alignment unit Pa will be described later.
  • the edge 30E on one end and the edge 30E on the other end of the insulating paper 30 are overlapped by a predetermined width.
  • the overlapping portion of the edge 30E on one end and the edge 30E on the other end is provided on a side surface of the slot 21 parallel to the radial direction.
  • the coil 10 of the alignment portion Pa does not protrude from the slot 21, so that a wedge for closing the slot open 22 becomes unnecessary.
  • FIG. 2A is a schematic diagram showing the annular coil bundle P.
  • the direction in which the annular coils of the annular coil bundle P are arranged as a bundle is referred to as a “bundle direction” unless otherwise specified.
  • One side in the bundle direction is inside and the other side is outside.
  • one of the winding directions of the coil 10 is referred to as an “insertion direction”.
  • One side along the insertion direction is the upper side, and the other side is the lower side.
  • a direction orthogonal to the insertion direction and the bundle direction is referred to as a “width direction”.
  • the reference determined in the bundle direction, the width direction, and the height direction is referred to as “annular coil bundle reference”.
  • the annular coil bundle P is formed by winding the coil 10 around a winding die 110 described later in a coil winding step S110 to a compression step S130 described later.
  • the annular coil bundle P is formed by winding one coil 10 a plurality of times.
  • the annular coil bundle P is formed in a substantially rectangular shape when viewed from the bundle direction.
  • the upper coil bundle parallel to the width direction of the annular coil bundle P is referred to as a ceiling Pc.
  • the lower coil bundle parallel to the width direction of the annular coil bundle P is defined as a bottom Pf.
  • the upper side is defined as the column part Pp, and the lower side is defined as the alignment part Pa.
  • the alignment portion Pa is stored in the slot 21 of the stator core 20 in an insertion step S160 and later, which will be described later.
  • the cross-sectional area of the cross section perpendicular to the insertion direction of the alignment portion Pa is substantially the same as the cross-sectional area of the cross section perpendicular to the axial direction of the slot 21 of the stator core 20. Note that “substantially the same” means the same except for design tolerance and a gap for insertion.
  • the cross-sectional shape of the cross section perpendicular to the insertion direction of the alignment portion Pa is larger than the cross-sectional shape of the cross section perpendicular to the insertion direction of the coil bundle other than the alignment portion Pa. small.
  • the length of the alignment portion Pa in the width direction based on the annular coil bundle is larger than the opening width of the slot open 22 in the circumferential direction based on the stator.
  • the annular coil bundle P includes a plurality of coil groups, each having a different length in the insertion direction, a lower coil bundle P1 as a first coil group, a middle coil bundle P2 as a second coil group, and a third coil group. And an upper coil bundle P3.
  • the pillar portion Pp of the lower coil bundle P1 is referred to as a pillar portion Pp1.
  • the pillar portion Pp of the middle coil bundle P2 is referred to as a pillar portion Pp2.
  • the pillar portion Pp of the upper coil bundle P3 is referred to as a pillar portion Pp3.
  • the column Pp3 is formed outside the column Pp2 in the width direction.
  • the column Pp2 is formed outside the column Pp1 in the width direction.
  • the ceiling Pc of the lower coil bundle P1 is referred to as a ceiling Pc1.
  • the ceiling Pc of the middle coil bundle P2 is referred to as a ceiling Pc2.
  • the ceiling Pc of the upper coil bundle P3 is referred to as a ceiling Pc3.
  • the ceiling Pc3 is formed above the ceiling Pc2 in the insertion direction.
  • the ceiling Pc2 is formed above the ceiling Pc1 in the insertion direction.
  • the bottom part Pf straddles between the slots 21 of the stator core 20 in an insertion step S160 and later.
  • the bottom part Pf is formed between the alignment parts Pa.
  • FIG. 2B is a schematic diagram showing the bent coil bundle P ′.
  • the bent coil bundle P ′ is formed by bending the annular coil bundle P using a winding die 110 described later in bending steps S141, S142, and S143 described below.
  • To "bend" the annular coil bundle P is to incline the ceiling Pc inward in the bundle direction, and follow the inclined ceiling Pc to bend the column Pp straight or curved.
  • a portion passing through the slot open 22 in an insertion step S160 described later is referred to as a passing portion Pt.
  • a portion passing through the slot open 22 in an insertion step S160 described later is referred to as a passing portion Pt1.
  • a portion passing through the slot open 22 in an insertion step S160 described later is referred to as a passing portion Pt2.
  • a portion passing through the slot open 22 in an insertion step S160 described later is referred to as a passing portion Pt3.
  • the length in the width direction of the passage portions Pt1, Pt2, and Pt3 is smaller than the length of the slot open 22 in the circumferential direction based on the stator.
  • the passing portions Pt1, Pt2, and Pt3 are formed by laminating each in the insertion direction.
  • the winding mold 110 is represented by a schematic diagram. The winding mold 110 will be described in accordance with the annular coil bundle standard.
  • the winding die 110 is used in a coil winding step S110 to a compression step S153 described later.
  • the winding die 110 includes a main body 115, support portions 111, 112, 113, slide portions 116, 117, and a guide portion 118.
  • the main body 115 is formed in a substantially rectangular parallelepiped.
  • the length of the main body 115 in the insertion direction is substantially the same as the length of the stator core 20 in the axial direction based on the stator.
  • the length of the main body 115 in the bundle direction is substantially the same as the length of the slot 21 of the stator core 20 in the radial direction based on the stator.
  • the length in the width direction of the main body 115 is substantially the same as the interval between the two slots 21 of the stator core 20 into which the annular coil bundle P is inserted. Note that “substantially the same” is the same except for a dimensional tolerance and a gap at the time of winding.
  • the upper side of the surface formed in the width direction and the bundle direction of the main body 115 is referred to as a “ceiling surface”, and the lower side is referred to as a “bottom surface”.
  • a surface formed in the insertion direction and the bundle direction of the main body 115 is referred to as a “side surface”.
  • One of the surfaces formed in the insertion direction and the width direction of the main body 115 is referred to as “front”, and the other surface is referred to as “back”.
  • the main body 115 is expanded and contracted in a predetermined direction, for example, a width direction. ⁇
  • a predetermined direction for example, a width direction.
  • Supporting part> The length of the supporting parts 111, 112, 113 in the bundle direction is substantially the same as the length of the main body 115 in the bundle direction.
  • the length in the width direction of the support portions 111, 112, 113 is substantially the same as the length in the width direction of the main body 115.
  • the support portions 111, 112, and 113 are supported by arms (not shown). Each arm is rotatably supported at a predetermined position (not shown) of the main body 115.
  • the support 111 is supported by the arm with respect to the main body 115.
  • the arm is rotatably supported at a predetermined position on the main body 115.
  • the arm is rotatably supported by the electric motor.
  • a recess 111 ⁇ / b> A is formed in the support part 111.
  • the support section 112 is supported by the arm with respect to the main body 115.
  • the arm is rotatably supported at a predetermined position on the main body 115.
  • the arm is rotatably supported by the electric motor.
  • the support portion 112 has a recess 112A.
  • the support portion 113 is supported by the arm with respect to the main body 115.
  • the arm is rotatably supported at a predetermined position on the main body 115.
  • the arm is rotatably supported by the electric motor.
  • the support 113 has a recess 113A.
  • the upper side of the surface formed in the width direction and the bundle direction of the support portion 111 is referred to as a “ceiling surface”, and the lower side is referred to as a “bottom surface”.
  • a surface formed in the insertion direction and the bundle direction of the support portion 111 is referred to as a “side surface”.
  • One of the surfaces formed in the insertion direction and the width direction of the support portion 111 is referred to as “front”, and the other surface is referred to as “back”. The same applies to the support portions 112 and 113.
  • a mold formed from both side surfaces of the main body 115, the bottom surface of the main body 115, both side surfaces of the support portion 111, and the concave portion 111A of the support portion 111 is referred to as a lower mold frame F1.
  • a mold formed from both side surfaces of the main body 115, the bottom surface of the main body 115, both side surfaces of the support portion 112, and the concave portion 112A of the support portion 112 is referred to as a middle mold form F2.
  • a mold formed from both side surfaces of the main body 115, the bottom surface of the main body 115, both side surfaces of the support portion 113, and the concave portion 113A of the support portion 113 is referred to as an upper mold frame F3.
  • the slide unit 116 is provided at a position facing both side surfaces of the main body 115.
  • the slide portion 117 is provided at a position facing the bottom surface of the main body 115.
  • the slide portion 116 and the slide portion 117 advance and retreat toward the main body 115 by a pneumatic cylinder.
  • the guide portion 118 is provided at each of the passing portions Pt1, Pt2, and Pt3 when the bent coil bundle P ′ shown in FIG. 2B is formed in the winding die 110.
  • a recess is formed in the guide portion 118.
  • the length in the width direction of the recess is substantially the same as the length in the width direction of the passing portions Pt1, Pt2, and Pt3. Note that “substantially the same” is the same except for a dimensional tolerance and a gap at the time of compression.
  • FIG. 4 illustrates the stator manufacturing process S100 by a flow.
  • the stator manufacturing process S100 forms an annular coil bundle P shown in FIG. 2A from the coil 10, transforms the annular coil bundle P into a bent coil bundle P ′ shown in FIG. 2B, and converts the bent coil bundle P ′ from two axial directions.
  • the stator 100 is manufactured by inserting it into the slot 21.
  • the stator manufacturing step S100 includes a coil winding step S110, an insulating paper winding step S120, a compression step S130, a bending step S141, a compression step S151, a bending step S142, a compression step S152, a bending step S143, and a compression step. It includes a step S153, an insertion step S160, and a restoration step S170.
  • FIG. 5 is a schematic diagram showing the coil winding step S110. In the following, a part of the coil 10 is omitted for easy understanding of the drawing. Further, the coil winding step S110 to the compression step S153 will be described according to the annular coil bundle standard.
  • the coil 10 is wound around the winding mold 110 to form the annular coil bundle P.
  • the winding die 110 is provided with the insulating paper 30 in advance.
  • the insulating paper 30 is provided on both side surfaces of the main body 115.
  • the insulating paper 30 may be temporarily disposed on both sides of the main body 115 with an adhesive.
  • the insulating paper 30 may be temporarily disposed on both side surfaces of the main body 115 by gripping the insulating paper 30 with a gripping tool (not shown).
  • the insulating paper 30 may be provided on the bottom surface of the main body 115.
  • the coil 10 is wound around the lower mold frame F1 to form a lower coil bundle P1.
  • the coil 10 may be pulled out from a coil extracting device (not shown), and the lower mold frame F1 may be rotated around an annular shaft and wound.
  • the coil 10 drawn from the coil drawing device may be wound around the fixed lower mold frame F1.
  • the coil 10 is wound around the supporting portion 111 while being supported by the concave portion 111A, and the ceiling Pc1 of the lower coil bundle P1 is formed.
  • the coil 10 is wound around the middle mold frame F2 to form a middle coil bundle P2.
  • the coil 10 may be pulled out from the coil extracting device, and the lower mold frame F1 and the middle mold frame F2 may be rotated around the annular axis and wound.
  • the coil 10 pulled out from the coil drawing device may be wound around the fixed middle mold F2.
  • the coil 10 is wound around the support portion 112 while being supported by the concave portion 112A, and the ceiling Pc2 of the middle coil bundle P2 is formed.
  • the coil 10 is wound around the upper mold frame F3 to form an upper coil bundle P3.
  • the coil 10 may be pulled out from the coil extracting device, and the lower mold frame F1, the middle mold frame F2, and the upper mold frame F3 may be rotated around the annular axis and wound.
  • the coil 10 drawn from the coil drawing device may be wound around the fixed upper mold F3.
  • the coil 10 is wound around the support portion 113 while being supported by the concave portion 113A, and the ceiling Pc3 of the upper coil bundle P3 is formed.
  • FIG. 6 is a schematic diagram showing the insulating paper winding step S120.
  • the insulating paper 30 sandwiched between the side surface of the main body 115 and the alignment section Pa in the coil winding step S110 is wound around the alignment section Pa of the annular coil bundle P.
  • the insulating paper 30 is wound so that the edge 30E and the edge 30E overlap by a predetermined width on the outer side surface in the width direction of the alignment portion Pa.
  • the predetermined width is at least 1 / of the length of the outer side surface in the width direction of the alignment portion Pa in the bundle direction.
  • the insulating paper 30 When winding the insulating paper 30 around the alignment portion Pa, the insulating paper 30 may be fixed to the alignment portion Pa of the annular coil bundle P with an adhesive. Alternatively, the edges 30E and 30E of the insulating paper 30 may be fixed with an adhesive.
  • FIG. 7 is a schematic diagram showing the compression step S130.
  • the alignment portion Pa and the bottom portion Pf are compressed by pressing the slide portion 116 and the slide portion 117 against the annular coil bundle P wound around the main body 115.
  • the shape of the alignment portion Pa is formed according to the side surface shape of the main body 115 of the winding die 110 and the side surface shape of the slide portion 116 facing the side surface shape of the main body 115.
  • the slide portions 116 advance toward both side surfaces of the main body 115, respectively, and compress the alignment portions Pa by pressing the slide portions 116 against the alignment portions Pa around which the insulating paper 30 is wound.
  • the entire alignment portion Pa is simultaneously compressed from the outside in the width direction.
  • the alignment portions Pa are compressed and aligned so that the gap between the coils 10 and the gap between the coil 10 and the main body 115 are reduced. Further, the coil 10 of the alignment portion Pa is compressed in the radial direction based on the coil.
  • the “coil reference” is different from the stator reference and the annular coil bundle reference described above in a direction based on one coil 10 alone. That is, the radial direction based on the coil is one of the radial directions from the axis of the coil 10.
  • the slide portion 117 advances toward the bottom surface of the main body 115 and is compressed by pressing the slide portion 117 against the bottom portion Pf of the annular coil bundle P.
  • the bottom portions Pf are aligned without gaps.
  • the coil 10 at the bottom Pf is compressed in the radial direction based on the coil.
  • the alignment portions Pa of the annular coil bundle P can be aligned without gaps, and the coils 10 of the alignment portions Pa can be compressed in the radial direction based on the coil.
  • the space factor of the stator 100 can be improved.
  • the compression is performed in the width direction of the alignment portion Pa by pressing the slide portion 116, but is not limited thereto.
  • the bundle direction of the alignment portion Pa may also be compressed. Specifically, for example, the slide unit is pressed in the bundle direction of the alignment unit Pa.
  • the compression is performed by pressing the slide portion 116, but is not limited thereto.
  • the alignment portion Pa may be simultaneously and stepwise compressed from the outside in the width direction by pressing a roller.
  • the roller When pressing the roller, the roller may be pressed stepwise from the lower side to the upper side in the insertion direction, or the roller may be pressed stepwise from the upper side to the lower side.
  • the rollers may be pressed stepwise from the inside to the outside along the bundle direction, or the rollers may be pressed stepwise from the outside to the inside.
  • the alignment portion Pa when compressing by pressing the roller, the alignment portion Pa can be compressed with a smaller pressing force than when compressing by pressing the slide portion 116.
  • FIG. 8 is a schematic diagram showing the bending step S141.
  • the lower coil bundle P1 is bent inward in the bundle direction. Specifically, the ceiling part Pc1 of the lower coil bundle P1 is inclined by rotating the support part 111 inward in the bundle direction by a predetermined angle, for example, approximately 60 °, and the column part Pp1 of the lower coil bundle P1 is bent.
  • the support unit 111 is rotated by a predetermined angle, for example, approximately 60 ° inward in the bundle direction by the electric motor.
  • a predetermined angle for example, approximately 60 ° inward in the bundle direction by the electric motor.
  • the ceiling portion Pc1 of the lower coil bundle P1 is inclined toward the inside in the bundle direction while being supported by the concave portion 111A.
  • the pillar portion Pp1 of the lower coil bundle P1 is bent following the ceiling portion Pc1.
  • the pillar portion Pp1 is formed in an arc shape.
  • the guide part 118 sandwiches the column part Pp1 of the lower coil bundle P1 in the recess in a state parallel to the bundle direction.
  • the guide portion 118 is in a state parallel to the height direction.
  • the compression step S151 will be described with reference to FIGS. FIGS. 9 and 10 schematically show the compression step S151.
  • the passing portion Pt1 is compressed by pressing a slide portion (not shown) against the passing portion Pt1.
  • the passing portion Pt1 passes through the slot open 22 when inserting the bent coil bundle P ′ into the stator core 20 in an insertion step S160 described later.
  • the sliding portion is pressed against the passing portion Pt1, whereby the passing portion Pt1 sandwiched between the recesses of the guide portion 118 is pressed downward to compress the passing portion Pt1.
  • the pillar portion Pp1 including the passing portion Pt1 is pressed downward while being sandwiched by the concave portion of the guide portion 118, and is deformed linearly from an arc shape.
  • the compression is performed so that the gap between the coils 10 of the passing portion Pt1 is reduced. Further, the coil 10 of the passage portion Pt1 is compressed in the radial direction based on the coil.
  • the length of the bent pillar portion Pp1 can be minimized. As a result, the overall length of the coil 10 can be reduced. Further, the length of the passage portion Pt1 in the insertion direction can be reduced. That is, the passing portion Pt1 can be stacked from a lower position in the height direction. As a result, the length of the coil 10 can be reduced, and the height of the coil end of the stator 100 can be reduced.
  • FIG. 11 is a schematic diagram illustrating the bending step S142.
  • the middle coil bundle P2 is bent inward in the bundle direction. Specifically, by rotating the support portion 112 inward in the bundle direction by a predetermined angle, for example, approximately 60 °, the ceiling Pc2 of the middle coil bundle P2 is inclined, and the column Pp2 of the middle coil bundle P2 is bent.
  • a predetermined angle for example, approximately 60 °
  • the support unit 112 is rotated by a predetermined angle, for example, approximately 60 ° inward in the bundle direction by the electric motor.
  • a predetermined angle for example, approximately 60 ° inward in the bundle direction by the electric motor.
  • the ceiling part Pc2 of the middle coil bundle P2 is inclined toward the inside in the bundle direction while being supported by the recess 112A.
  • the pillar portion Pp2 of the middle coil bundle P2 is bent following the ceiling portion Pc2.
  • the pillar portion Pp2 is formed in an arc shape.
  • the guide part 118 sandwiches the pillar part Pp2 of the middle coil bundle P2 in the recess in a state parallel to the bundle direction.
  • the guide portion 118 is in a state parallel to the height direction.
  • FIG. 12 is a schematic diagram showing the compression step S152.
  • the passing portion Pt2 is compressed by pressing a slide portion (not shown) against the passing portion Pt2.
  • the passing portion Pt2 passes through the slot open 22 when inserting the bent coil bundle P 'into the stator core 20 in an insertion step S160 described later.
  • the sliding portion is pressed against the passing portion Pt2, whereby the passing portion Pt2 sandwiched between the recesses of the guide portion 118 is pressed downward to compress the passing portion Pt2.
  • the pillar portion Pp2 including the passing portion Pt2 is pressed downward while being sandwiched by the concave portion of the guide portion 118, and is deformed from an arc to a straight line.
  • the compression is performed so that the gap between the coils 10 of the passing portion Pt2 is reduced. Further, the coil 10 forming the passage portion Pt2 is compressed in the radial direction based on the coil.
  • the length of the pillar portion Pp2 can be minimized.
  • the length of the coil 10 can be reduced.
  • the length of the passage portion Pt2 in the insertion direction can be shortened. That is, the passage portion Pt3 can be stacked from a lower position in the height direction. As a result, the length of the coil 10 can be reduced, and the height of the coil end of the stator 100 can be reduced.
  • FIG. 13 is a schematic diagram illustrating the bending step S143.
  • the upper coil bundle P3 is bent inward in the bundle direction. Specifically, by rotating the support portion 113 inward in the bundle direction by a predetermined angle, for example, approximately 60 °, the ceiling portion Pc3 of the upper coil bundle P3 is inclined, and the column portion Pp3 of the upper coil bundle P3 is bent.
  • a predetermined angle for example, approximately 60 °
  • the support unit 113 is rotated inward in the bundle direction by a predetermined angle, for example, approximately 60 ° by the electric motor.
  • a predetermined angle for example, approximately 60 ° by the electric motor.
  • the ceiling part Pc3 of the upper coil bundle P3 is inclined toward the inside in the bundle direction while being supported by the recess 113A.
  • the pillar part Pp3 of the upper coil bundle P3 is bent following the ceiling part Pc3.
  • the pillar portion Pp3 is formed in an arc shape.
  • the guide part 118 sandwiches the column part Pp3 of the upper coil bundle P3 in the recess in a state parallel to the bundle direction.
  • the guide portion 118 is in a state parallel to the height direction.
  • FIG. 14 is a schematic diagram showing the compression step S153.
  • the passing portion Pt3 is compressed by pressing a slide portion (not shown) against the passing portion Pt3.
  • the passing portion Pt3 passes through the slot open 22 when inserting the bent coil bundle P 'into the stator core 20 in an insertion step S160 described later.
  • the passing portion Pt3 sandwiched by the concave portion of the guide portion 118 is pressed downward by pressing the slide portion against the passing portion Pt3 to compress the passing portion Pt3.
  • the pillar portion Pp3 including the passage portion Pt3 is pressed downward while being sandwiched by the concave portion of the guide portion 118, and is deformed linearly from an arc shape.
  • the compression is performed so that the gap between the coils 10 of the passage portion Pt3 is reduced. Further, the coil 10 forming the passage portion Pt3 is compressed in the radial direction based on the coil.
  • the length of the pillar portion Pp3 can be minimized.
  • the length of the coil 10 can be reduced.
  • the length of the passage portion Pt3 in the insertion direction can be reduced.
  • the length of the coil 10 can be reduced, and the height of the coil end of the stator 100 can be reduced.
  • Insertion Step> An insertion step S160 will be described with reference to FIGS. 15A, 15B, and 15C.
  • 15A, 15B, and 15C schematically show the insertion step S160.
  • 15A, 15B, and 15C show the progress of the insertion step S160 in the order of FIGS. 15A, 15B, and 15C.
  • the insertion step S160 and the restoration step S170 will be described according to the stator standard. Note that the axial direction based on the stator and the insertion direction based on the annular coil bundle are the same direction.
  • the bent coil bundle P ' is inserted in the axial direction toward the two slots 21 of the stator core 20.
  • the two slots 21 into which the bent coil bundle P ′ is inserted are one slot 21 sandwiching two slots 21 and the other slot 21, but are not limited thereto.
  • the folded coil bundle P ′ is arranged below the stator core 20 in the axial direction.
  • the bent coil bundle P ′ is arranged on the stator core 20 in a state where the passage portion Pt is located below the slot open 22 in the axial direction.
  • the folded coil bundle P ′ is arranged on the stator core 20 in a state where the alignment portion Pa is located below the slot 21.
  • the folded coil bundle P ' is arranged on the stator core 20 with the ceiling Pc facing radially inward.
  • the bent coil bundle P ′ is moved upward in the axial direction, and a radially outer portion of the column Pp (not shown) is inserted into the slot 21.
  • the passing portion Pt passes through the slot open 22, and the ceiling portion Pc passes inside the stator core 20 in the radial direction.
  • the passing portion Pt can be smoothly guided to the slot open 22 by sandwiching the passing portion Pt by the guide portion 118. Before the passing portion Pt passes through the slot open 22, the guide portion 118 is removed from the passing portion Pt.
  • the bending coil bundle P ′ is further moved upward in the axial direction, and the not-shown alignment portion Pa is inserted into the slot 21.
  • the ceiling part Pc and the pillar part Pp move above the stator core 20.
  • the bottom Pf straddles between the slots 21 at the bottom of the stator core 20.
  • the operator may manually insert the bending coil bundle P'. Further, the folded coil bundle P ′ may be automatically inserted into the stator core 20 using an insertion device.
  • the restoring step S170 will be described with reference to FIG. In FIG. 16, the restoration step S170 is represented by a schematic diagram.
  • the bent coil bundle P ′ is transformed into the original shape of the annular coil bundle P.
  • the bent coil bundle P ′ may be deformed by an operation of an operator.
  • the restoration may be automatically performed by using a restoration device that rotates the ceiling Pc to deform the column Pp in parallel with the insertion direction.
  • the unillustrated alignment portion Pa of the annular coil bundle P is stored in the slot 21, and the bottom portion Pf straddles the slot 21. ⁇ 2-4. Effect>
  • the stator 100 having a high space factor can be manufactured. That is, the annular coil bundle P is formed to compress the aligned portion Pa, the annular coil bundle P is bent into a coil bundle P ′, and the aligned portion Pa is stored in the slot 21 while passing the passage portion Pt through the slot open 22. By doing so, the stator 100 having a high space factor can be manufactured.
  • Second Embodiment A second embodiment will be described. In the following, description of items common to the first embodiment will be omitted. In addition, the reference, the definition of words, and the method of assigning reference numerals are the same as those in the first embodiment.
  • FIG. 17A is a schematic diagram showing the annular coil bundle Q. In the following, description will be given in accordance with the annular coil bundle standard.
  • the annular coil bundle Q is formed by winding the coil 10 around a winding die 210 described later in a coil winding step S210 to a compression step S230 described later.
  • the annular coil bundle Q is formed by winding one coil 10 a plurality of times.
  • the annular coil bundle Q is formed in two substantially rectangular shapes as viewed from the bundle direction.
  • the annular coil bundle Q includes a first annular coil bundle Q1 and a second annular coil bundle Q2.
  • the lengths of the first annular coil bundle Q1 in the bundle direction and the insertion direction are substantially the same as the lengths of the second annular coil bundle Q2 in the bundle direction and the insertion direction.
  • the width direction length of the first annular coil bundle Q1 is smaller than the width direction length of the second annular coil bundle Q2.
  • the first annular coil bundle Q1 and the second annular coil bundle Q2 are formed adjacent to each other in the bundle direction.
  • the first annular coil bundle Q1 and the second annular coil bundle Q2 are formed so that their centers are substantially the same in the width direction.
  • each ceiling part Q1c, Q2c, bottom part Q1f, Q2f, pillar part Q1p, Q2p, alignment part Q1a, Q2a are the same as ceiling part Pc, bottom part Pf, pillar part Pp, alignment part Pa of the first embodiment. Therefore, the description is omitted. Further, the lower coil bundle, the middle coil bundle, and the upper coil bundle are the same as the lower coil bundle P1, the middle coil bundle P2, and the upper coil bundle P3 of the first embodiment, and thus description thereof will be omitted.
  • FIG. 17B is a schematic diagram showing the bent coil bundle Q ′.
  • the bent coil bundle Q ′ is formed by bending the first annular coil bundle Q1 and the second annular coil bundle Q2 using a winding die 210 described later in bending steps S241, S242, and S243 described later.
  • a portion passing through the slot open 22 in an insertion step S260 described later is referred to as a passing portion Q1t.
  • a portion passing through the slot open 22 in an insertion step S260 described later is referred to as a passing portion Q2t.
  • the winding die 210 will be described with reference to FIG. In FIG. 18, the winding die 210 is represented by a schematic diagram. The winding die 210 will be described in accordance with the annular coil bundle standard.
  • the winding die 210 is used in a coil winding step S210 to a compression step S253 described later.
  • the winding die 210 includes main bodies 215 and 225, support portions 211 and 221, support portions 212 and 222, support portions 213 and 223, and a slide portion (not shown).
  • the main body 215, the support part 211, the support part 212, and the support part 213 are the same as the main body 115, the support part 111, the support part 112, and the support part 113 of the first embodiment, the description is omitted.
  • the length of the main body 225 in the bundle direction and the insertion direction is substantially the same as the length of the main body 215 in the bundle direction and the insertion direction.
  • the length in the width direction of the main body 225 is larger than the length in the width direction of the main body 215.
  • the length of the support portion 221 in the bundle direction and the insertion direction is substantially the same as the length of the support portion 211 in the bundle direction and the insertion direction.
  • the length in the width direction of the support portion 221 is larger than the length in the width direction of the support portion 211. The same applies to the support portions 222 and 223.
  • the main body 215 and the main body 225 are provided adjacent to each other in the bundle direction.
  • the main body 215 and the main body 225 are provided so that their centers are substantially the same in the width direction.
  • the support part 221 and the support part 211 are provided adjacent to each other in the bundle direction.
  • the support portion 221 and the support portion 211 are provided so that their centers are substantially the same in the width direction. The same applies to the support portions 222 and 223.
  • a mold formed by the main body 215, the support portion 211, the support portion 212, and the support portion 213 is referred to as a first mold G1.
  • a mold formed by the main body 225, the support portion 221, the support portion 222, and the support portion 223 is referred to as a second form G2.
  • the length in the width direction of the first mold frame G1 is larger than the length in the width direction of the second mold frame G2. Further, the first mold frame G1 and the second mold frame G2 are provided adjacent to each other in the bundle direction. Further, the first mold frame G1 and the second mold frame G2 are provided so that their centers are substantially the same in the width direction.
  • the winding die 210 includes slide portions that advance and retreat toward the respective side surfaces and bottom surfaces of the main body 215 and the main body 225, the description is omitted because they are the same as the slide portions 116 and 117 of the first embodiment.
  • the winding die 210 has a guide portion for the passing portion Q1t and the passing portion Q2t, the description is omitted because it is the same as the guide portion 118 of the first embodiment.
  • FIG. 19 illustrates the stator manufacturing process S200 by a flow.
  • the stator manufacturing process S200 forms an annular coil bundle Q shown in FIG. 17A from the coil 10, transforms the annular coil bundle Q into a bent coil bundle Q ′ shown in FIG.
  • the stator 100 is manufactured by inserting it into the slot 21.
  • the stator manufacturing step S200 includes a coil winding step S210, an insulating paper winding step S220, a compression step S230, a processing step S240, an insertion step S260, and a restoration step S270.
  • FIG. 20 is a schematic diagram showing the coil winding step S210. In the following, a part of the coil 10 is omitted for easy understanding of the drawing. Further, the coil winding step S210 and the bending step S241 will be described according to the annular coil bundle standard.
  • the coil 10 is wound around the winding die 210 to form the annular coil bundle Q.
  • the insulating paper 30 is provided in advance on the main body 215 and the main body 225.
  • the coil 10 is wound around the first formwork G1 to create a first annular coil bundle Q1.
  • the coil 10 is wound around the second form G2 to form a second annular coil bundle Q2.
  • the coil 10 When winding the coil 10 around the first formwork G1 or the second formwork G2, the coil 10 is drawn out from a coil drawing device (not shown), and the first formwork G1 or the second formwork G2 is moved around the annular shaft. You may rotate and wind. Alternatively, the coil 10 pulled out from the coil drawing device may be wound around the fixed first formwork G1 or second formwork G2.
  • first mold frame G1 and the second mold frame G2 are provided so that their centers are substantially the same in the width direction, it is possible to simultaneously wind the coil 10 around the first mold frame G1 and the second mold frame G2. it can. Further, since the first mold frame G1 and the second mold frame G2 are provided adjacent to each other in the bundle direction, it is possible to shorten the crossover between the first annular coil bundle Q1 and the second annular coil bundle Q2.
  • the insulating paper winding step S220 and the compression step S230 are the same as the insulating paper winding step S120 and the compression step S130 of the first embodiment, and thus description thereof will be omitted.
  • the processing step S240 processes the upper side in the insertion direction of the first annular coil bundle Q1 and the second annular coil bundle Q2.
  • the upper side in the insertion direction of the first annular coil bundle Q1 and the second annular coil bundle Q2 is bent.
  • the processing step S240 bends the first annular coil bundle Q1 and the second annular coil bundle Q2 and compresses the respective passing portions Q1t and Q2t, but is not limited thereto.
  • the coil ends of the first annular coil bundle Q1 and the second annular coil bundle Q2 may be compressed, the coil ends may be twisted, and a heat radiating material may be applied to the coil ends.
  • the processing step S240 includes a bending step S241, a compression step S251, a bending step S242, a compression step S252, a bending step S243, and a compression step S253.
  • FIG. 21 is a schematic diagram showing the bending step S241.
  • the ceiling portions Q1c1 and Q2c1 are inclined by rotating the support portions 211 and 221 inward in the bundle direction by a predetermined angle, for example, approximately 60 °, and the column portions Q1p1 and Q2p1 are simultaneously bent.
  • a predetermined angle for example, approximately 60 °
  • the column portions Q1p1 and Q2p1 are simultaneously bent.
  • the bending step S242 and the bending step S243 are the same as those in the bending step S241, and thus the description thereof is omitted.
  • the compression process S251, the compression process S252, and the compression process S253 are the same as the compression processes S151, 152, and 153 of the first embodiment, and thus the description is omitted.
  • FIG. 22 is a schematic diagram showing the insertion step S260. Further, the insertion step S260 will be described according to the stator reference. Note that the axial direction based on the stator and the insertion direction based on the annular coil bundle are the same direction.
  • the bent coil bundle Q ' is inserted in the axial direction toward the four slots 21 of the stator core 20.
  • the four slots 21 into which the bent coil bundle Q ′ is inserted include one slot 21 and another slot 21 sandwiching two slots 21, and one slot 21 and another slot 21.
  • the slots 21 are adjacent to each other on the outer side in the circumferential direction, but are not limited thereto.
  • the center of the first bent coil bundle Q1 ′ in the bundle direction based on the annular coil bundle and the center of the second bent coil bundle Q2 ′ in the bundle direction based on the annular coil bundle. are arranged to be substantially the same.
  • the bending coil bundle Q ′ is moved upward in the axial direction, and the alignment portions Q1a and Q2a are inserted into the slots 21.
  • the ceilings Q1c, Q2c and the pillars Q1p, Q2p move above the stator core 20.
  • the bottoms Q1f and Q2f straddle between the slots 21 at the bottom of the stator core 20, respectively.
  • Reference Signs List 10 coil, 20: stator core, 21: slot, 22: slot open, 30: insulating paper, 100: stator, 110, 210: winding type, S100, S200: stator manufacturing process, P, Q: annular coil bundle, P ', Q': bent coil bundle, Pa, Qa: aligned part, Pt, Qt: passing part

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Power Engineering (AREA)
  • Manufacture Of Motors, Generators (AREA)

Abstract

Le problème décrit par la présente invention est de fournir un procédé de fabrication de stators, qui permet une réduction de la longueur d'une extrémité de bobine. La solution selon l'invention porte sur un procédé de fabrication de stators qui comprend : une étape de pliage (S141, S142, S143) pour courber le côté supérieur d'un faisceau de bobine annulaire P dans sa direction d'insertion, le faisceau de bobine annulaire P étant formé par enroulement d'une bobine (10) au moins une pluralité de fois ; et une étape d'insertion (S160) pour insérer un faisceau de bobine plié P' dans une fente (21) dans un noyau de stator (20) dans la direction axiale d'un stator (100) depuis le côté supérieur dans la direction d'insertion. Une section de passage Pt est formée sur le faisceau de bobine plié P' par pliage du côté supérieur, dans la direction d'insertion, du faisceau de bobine annulaire P dans l'étape de pliage (S141, S142, S143). Lors de l'étape d'insertion (160), la section de passage Pt passe par l'ouverture (22) de fente de la fente (21) dans la direction axiale du stator (100). La longueur de la section de passage Pt dans le sens de la largeur est inférieure à la largeur de l'ouverture (22) de fente. Dans l'étape de pliage (S141, S142, S143), la section de passage Pt est comprimée après le pliage de la bobine annulaire P.
PCT/JP2019/025033 2018-08-31 2019-06-25 Procédé permettant de fabriquer des stators WO2020044753A1 (fr)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003153478A (ja) * 2001-11-08 2003-05-23 Mitsubishi Electric Corp 回転電機の固定子およびその製造方法
JP2014183647A (ja) * 2013-03-19 2014-09-29 Yaskawa Electric Corp コイル、回転電機および回転電機の製造方法

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JPH09322491A (ja) * 1996-05-31 1997-12-12 Hitachi Ltd モータとモータの巻線方法及び巻線装置
JP4851806B2 (ja) * 2006-02-16 2012-01-11 澤藤電機株式会社 回転電機用電機子及び電機子の製造方法
JP2007267463A (ja) * 2006-03-28 2007-10-11 Hitachi Ltd 回転電機及び回転電機の製造方法
JP2017028821A (ja) * 2015-07-21 2017-02-02 トヨタ自動車株式会社 ステータの製造方法
JP6735094B2 (ja) * 2015-12-25 2020-08-05 住友重機械工業株式会社 モータおよびステータの製造方法
JP6107990B2 (ja) * 2016-03-02 2017-04-05 株式会社安川電機 コイル製造用巻線部材

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003153478A (ja) * 2001-11-08 2003-05-23 Mitsubishi Electric Corp 回転電機の固定子およびその製造方法
JP2014183647A (ja) * 2013-03-19 2014-09-29 Yaskawa Electric Corp コイル、回転電機および回転電機の製造方法

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