WO2011155061A1 - ステータ及びそれに使用される単位コイルの製造方法 - Google Patents
ステータ及びそれに使用される単位コイルの製造方法 Download PDFInfo
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- WO2011155061A1 WO2011155061A1 PCT/JP2010/059943 JP2010059943W WO2011155061A1 WO 2011155061 A1 WO2011155061 A1 WO 2011155061A1 JP 2010059943 W JP2010059943 W JP 2010059943W WO 2011155061 A1 WO2011155061 A1 WO 2011155061A1
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- coil
- winding
- unit
- connection end
- coils
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- 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
- H02K3/12—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots
-
- 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
- H02K15/0435—Wound windings
- H02K15/0442—Loop windings
- H02K15/045—Form wound coils
-
- 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
- H02K15/062—Windings in slots; salient pole windings
- H02K15/065—Windings consisting of complete sections, e.g. coils, waves
- H02K15/066—Windings consisting of complete sections, e.g. coils, waves inserted perpendicularly to the axis of the slots or inter-polar channels
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49009—Dynamoelectric machine
Definitions
- the present invention includes a stator core and a distributed winding type multi-phase coil assembled to the stator core, and the multi-phase coil is composed of a plurality of unit coils formed by winding a rectangular conductor wire a plurality of times, and a stator used therein.
- the present invention relates to a method for manufacturing a unit coil.
- the stator described in Patent Document 1 below includes a plurality of unit coils formed by winding a rectangular conducting wire (flat conducting wire) a plurality of times.
- the plurality of unit coils are assembled in slots of the stator core and connected for each phase to constitute a distributed winding type multi-phase coil.
- the unit coil includes a straight portion that is inserted into a slot of the stator core and coil end portions that are disposed on both end faces of the stator core.
- the coil end portion is formed with a crank-shaped portion that is not twisted.
- Each unit coil is assembled to the stator core so as to be wound concentrically across the slots for different phases.
- a concentrated winding type and a distributed winding type as a form of the multiphase coil of the stator.
- the coil is wound around each tooth of the stator core.
- the distributed winding type a plurality of unit coils are wound across a plurality of slots of the stator core, and the unit coils of different or in-phase are arranged to overlap each other at the coil end.
- a stator provided with a concentrated winding type multi-phase coil can reduce the coil end and is effective for miniaturization and high efficiency of a motor.
- a stator including a distributed winding type multiphase coil can bring the rotating magnetic field of the inner periphery of the stator closer to a sine wave, and can achieve higher output and lower noise than the concentrated winding type.
- high output of the motor can be achieved by using a rectangular wire for the coil wire and increasing the coil space factor in the slot.
- Patent Document 2 describes a stator in which a multiphase coil is wound around a stator core with a single homologous core.
- the multi-phase coils are unit coils, respectively, a first U-phase coil, a second U-phase coil, a first V-phase coil, a second V-phase coil, a first W-phase coil, and a first coil. 2 W-phase coils are included.
- the first U-phase coil is configured by single homologous core winding of the first strand coil, the second strand coil, and the third strand coil.
- the winding end portion of the first strand coil and the winding start end portion of the second strand coil are connected to each other, and the winding end portion of the second strand coil and the third strand
- the winding start end of the coil is connected to each other. That is, the first U-phase coil is configured such that three-layered wire coils wound concentrically form one unit coil.
- the winding start end of the first strand coil and the winding end of the third strand coil constitute a pair of connection ends connected to the second U-phase coil.
- the configurations of the second U-phase coil, the first V-phase coil, the second V-phase coil, the first W-phase coil, and the second W-phase coil are the same as described above.
- the unit coil described in Patent Document 1 is configured as a multi-layer concentric winding as described in Patent Document 2.
- the winding start end and winding end of each layer coil must be connected to each other. For this reason, troublesome connection work is required.
- the coil ends of the stator are bulky, and there is a possibility that downsizing of the stator is hindered.
- the present invention has been made in view of the above circumstances, and the object thereof is to simplify the connecting operation of unit coils in order to constitute a multiphase coil, and to reduce the bulkiness of the coil end. Another object of the present invention is to provide a stator and a method of manufacturing a unit coil used for the stator.
- a stator core having a plurality of slots, a distributed winding type multiphase coil provided in the stator core, and the multiphase coil includes a plurality of rectangular conductors.
- the plurality of unit coils are concentrically wound.
- a plurality of layer coils are formed by a single continuous rectangular wire, and the plurality of layer coils include an outermost layer coil and an innermost layer coil,
- the winding start end or winding end of the layer coil and the winding end or winding start of the innermost layer coil constitute the first connection end and the second connection end of the unit coil.
- the distributed winding type multi-phase coil is composed of coils having different phases, for example, a U-phase coil, a V-phase coil, and a W-phase coil.
- Each phase coil is configured by connecting a plurality of unit coils in series with each other.
- the first connection ends of the unit coils adjacent on the stator core may be connected to each other, and the second connection ends may be connected to each other. Therefore, unlike a conventional stator using unit coils, it is not necessary to connect a plurality of layer coils constituting the same unit coil to each other.
- both the first connection end and the second connection end provided in each unit coil are one end face in the axial direction of the stator core. And one of the first connection end and the second connection end is disposed at a position near the inner periphery of the stator core, and the other is disposed at a position near the outer periphery of the stator core;
- first connection end portions of adjacent unit coils constituting the same phase are connected to each other, and second connection end portions of adjacent unit coils constituting the same phase are connected to each other. It is preferable to provide.
- connection between the first connection end and the second connection end of the adjacent unit coils constituting the same phase in addition to the operation of the configuration of the above (1), the connection between the first connection end and the second connection end of the adjacent unit coils constituting the same phase.
- the portion is divided into an inner peripheral position and an outer peripheral position of the stator core.
- a stator core having a plurality of slots, a distributed winding type multiphase coil provided in the stator core, and the multiphase coil includes a plurality of rectangular conductors.
- the plurality of unit coils are concentrically wound.
- a plurality of layer coils are formed by a single continuous rectangular wire, and the plurality of layer coils include an outermost layer coil and an innermost layer coil,
- the winding start end or winding end of the layer coil and the winding end or winding start of the innermost layer coil constitute the first connection end and the second connection end of the unit coil.
- the distributed winding type multi-phase coil is composed of coils having different phases, for example, a U-phase coil, a V-phase coil, and a W-phase coil.
- Each phase coil is configured by connecting a plurality of unit coils in series with each other.
- the first connection ends of the unit coils adjacent on the stator core may be connected to each other, and the second connection ends may be connected to each other. Therefore, unlike a conventional stator using unit coils, it is not necessary to connect a plurality of layer coils constituting the same unit coil to each other.
- both the first connection end and the second connection end provided in each unit coil are one end face in the axial direction of the stator core.
- the first connection end and the second connection end are both disposed at the inner peripheral position or the outer peripheral position of the stator core and constitute the same phase among the plurality of unit coils. It is preferable that the first connection end portions of the adjacent unit coils are connected to each other, and the second connection end portions of the adjacent unit coils that similarly constitute the same phase are connected to each other.
- connection between the first connection end and the second connection end of adjacent unit coils constituting the same phase are disposed together at the inner peripheral position or the outer peripheral position of the stator core.
- a third aspect of the present invention is a method of manufacturing a unit coil used for a stator in the configuration of (1) above, wherein at least one step is formed on the outer periphery.
- the small coil wound around the small winding drum is inside the large coil wound around the large winding drum. It is provided with a moving process that moves relatively by deforming, Ri and spirit to produce a single coil including a plurality of layers coils concentrically wound.
- a plurality of layer coils can be easily concentrically wound by a single flat wire.
- a fourth aspect of the present invention is a method of manufacturing a unit coil used for a stator in the configuration of (3) above, and is an inner layer winding type having a substantially prismatic shape.
- An inner layer winding step in which an inner layer coil is formed by spirally winding a single flat conducting wire from one end side to the other end side, and then an outer layer having a substantially rectangular tube shape outside the inner layer coil.
- the outer layer winding mold moving step for moving the winding mold, and then the rectangular conductor wire on the outer periphery from the one end side to the other end side of the outer layer winding mold through the connecting part extending the winding end of the inner layer coil.
- An outer layer winding step in which an outer layer coil is formed by spirally winding in a direction opposite to the winding advance direction, and then releasing the formed inner layer coil and outer layer coil from the inner layer winding mold and the outer layer winding mold A concentric winding And purpose to produce a single coil comprising two layers coils.
- the outer layer coil and the inner layer coil can be easily concentrically wound by a single flat wire.
- a unit coil composed of at least an outer layer coil and an inner layer coil can be easily manufactured with a single rectangular wire.
- the perspective view which concerns on 1st Embodiment and shows a stator The perspective view which shows the front side of one unit coil concerning the embodiment. The perspective view which concerns on the embodiment and shows the back side of one unit coil. The top view which concerns on the same embodiment and shows one unit coil. The perspective view which shows the two unit coils superimposed on the same embodiment. The perspective view which shows a mode that it concerns on the embodiment and inserts the divided
- the top view which shows schematically arrangement
- the perspective view which shows the part which concerns on the embodiment and comprises the coil end of a unit coil.
- the perspective view which shows a part of coil end of a stator according to the embodiment.
- the flowchart which shows a series of processes regarding the manufacturing method of a unit coil according to the embodiment. Sectional drawing which concerns on the same embodiment and shows the state of a "winding process” schematically. Sectional drawing which shows the state of a "mold release process" concerning the embodiment. Sectional drawing which shows the state of a "movement process” concerning the embodiment. Sectional drawing which shows the state of a "movement process” concerning the embodiment.
- FIG. 5 is a cross-sectional view schematically showing a state of an “outer layer winding mold moving step” according to the same embodiment. Sectional drawing which shows the state of an "outer layer winding process” concerning the embodiment.
- FIG. 6 is a cross-sectional view schematically showing a state after a “release process” according to the embodiment.
- FIG. 1 is a perspective view showing a stator 1 of this embodiment.
- the stator 1 is used for a three-phase motor having a U phase, a V phase, and a W phase.
- the stator 1 includes a stator core 4 having a plurality of teeth 2 (see FIGS. 6 to 8) and a plurality of slots 3 (see FIGS. 6 to 8), a distributed winding type multiphase coil 5 provided on the stator core 4, and And an outer ring 6 mounted on the outer periphery of the stator core 4.
- the multiphase coil 5 includes a plurality (24 in this embodiment) of unit coils 7, and the plurality of unit coils 7 are assembled and connected to the plurality of slots 3 of the stator core 4.
- the stator core 4 of this embodiment is of a split type formed by connecting a plurality of pieces 17 (see FIG. 6) in an annular shape. In FIG. 1, the stator core 4 is shown as an integral type for convenience.
- the multiphase coil 5 includes a U phase coil that constitutes the U phase, a V phase coil that constitutes the V phase, and a W phase coil that constitutes the W phase.
- Each phase coil is composed of eight unit coils 7.
- the unit coils 7 constituting each phase coil are assembled to the plurality of slots 3 of the stator core 4 in a manner of being concentrically wound across the different phase slots 3 to which other different phase coils are assembled.
- FIG. 2 is a perspective view showing the front side of one unit coil 7.
- FIG. 3 is a perspective view showing the back side of one unit coil 7.
- FIG. 4 is a plan view showing one unit coil 7.
- the unit coil 7 has a substantially hexagonal shape as a whole, and includes an outer layer coil 8 and an inner layer coil 9 wound concentrically.
- the outer layer coil 8 and the inner layer coil 9 are formed by winding a single continuous rectangular wire 10 a plurality of times.
- the winding start end 8a of the outer layer coil 8 and the winding end end 9a of the inner layer coil 9 form a pair of first connection end 11 and second connection end provided in one unit coil 7.
- Part 12 is configured.
- the first connection end 11 and the second connection end 12 are separately arranged at both ends in the axial direction of the unit coil 7 (the front-rear direction in FIGS. 2 and 3). That is, the first connection end 11 is arranged on the back side of the unit coil 7 as shown in FIGS. As shown in FIGS. 2 and 3, the second connection end 12 is disposed on the front side of the unit coil 7.
- the unit coil 7 configured in this manner has a shape bent into a substantially S shape in plan view.
- the unit coil 7 includes an outer circumferential arrangement portion 7 a arranged on the outer circumferential side of the stator core 4, an inner circumferential arrangement portion 7 b arranged on the inner circumferential side of the stator core 4, and the stator core 4. It can be divided into three parts, that is, an intermediate arrangement part 7c arranged between the inner peripheral side and the outer peripheral side.
- the flat conducting wire 10 used for the unit coil 7 is formed by coating an insulating resin around a metal wire having a rectangular cross section.
- a metal having high conductivity such as copper is used for the metal wire.
- the insulating resin a highly insulating resin such as enamel or PPS is used.
- FIG. 5 is a perspective view showing two unit coils 7A and 7B that are overlapped in the process of forming the coil cage 16 (see FIG. 6).
- a positioning jig 21 for positioning the unit coils 7A and 7B is provided in the back of the two unit coils 7A and 7B.
- two unit coils 7A and 7B having the same shape are arranged such that the intermediate arrangement portion 7c is adjacent to each other.
- the inner peripheral arrangement portion 7b of the other unit coil 7A is arranged below the intermediate arrangement portion 7c of one unit coil 7B. Further, the outer peripheral arrangement portion 7a of one unit coil 7B is arranged below the intermediate arrangement portion 7c of the other unit coil 7A.
- FIG. 6 is a schematic perspective view showing a state in which the divided pieces 17 constituting the stator core 4 are inserted into the coil rod 16.
- the coil cage 16 is formed by superposing 24 unit coils 7 on each other as shown in FIG.
- the stator core 4 is formed in an annular shape by inserting each piece 17 into the gap from the outer peripheral side of the coil rod 16.
- each piece 17 includes two teeth 2 and one slot 3 positioned between the teeth 2.
- the piece 17 is assembled so that the tooth 2 is inserted into the gap between the unit coils 7 constituting the coil cage 16.
- the outer ring 6 is shrink-fitted around the outer periphery of the stator core 4.
- the eight unit coils 7 constituting the U-phase coil, the V-phase coil, and the W-phase coil are connected to each other in series via the connection end portions 11 and 12.
- the stator 1 as shown in FIG. 1 can be completed.
- both the first connection end 11 and the second connection end 12 provided in each unit coil 7 are arranged on the upper end surface in the axial direction of the stator core 4.
- the second connection end 12 of the inner layer coil 9 is disposed near the outer periphery of the stator core 4
- the first connection end 11 of the outer layer coil 8 is disposed near the inner periphery of the stator core 4.
- the second connection end portions 12 of adjacent unit coils 7 constituting a coil of a certain phase for example, “U-phase coil”
- first connection end portions 11 of adjacent unit coils 7 constituting a certain phase coil are connected to each other at a position near the inner periphery of the stator core 4.
- FIG. 7 schematically shows the arrangement of only the outer layer coils 8 of the eight unit coils 7 constituting the W-phase coil provided in the stator core 4 in a plan view.
- FIG. 8 is a schematic plan view showing the arrangement of only the inner layer coils 9 of the eight unit coils 7 constituting the W-phase coil provided in the stator core 4. 7 and 8, the stator core 4 is shown as an integral type for convenience.
- the stator core 4 can be divided into first to eighth blocks B1, B2, B3, B4, B5, B6, B7, and B8.
- Each of the blocks B1 to B8 includes a set of six slots 3 used for the U-phase coil, the V-phase coil, and the W-phase coil.
- the first block B1 includes two slots 3 corresponding to two U phases U1 and U2, two slots 3 corresponding to two V phases V1 and V2, and 2 corresponding to two W phases W1 and W2.
- One slot 3 is included as a set. The same applies to the other blocks B2 to B8.
- a part of the outer layer coil 8 constituting one unit coil 7 is inserted into the slot 3 corresponding to the W phase W2 of the first block B1. Further, as shown in FIG. 7, a part of the outer layer coil 8 constituting another adjacent unit coil 7 is inserted into the slot 3 corresponding to the W phase W2 of the second block B2.
- a part of the inner layer coil 9 constituting one unit coil 7 is inserted into the slot 3 corresponding to the W phase W1 of the first block B1. Also, as shown in FIG. 8, a part of the inner layer coil 9 constituting another adjacent unit coil 7 is inserted into the slot 3 corresponding to the W phase W1 of the second block B2.
- FIG. 9 is a perspective view showing a portion constituting the coil end of the unit coil 7 of this embodiment.
- FIG. 10 is a perspective view showing a part of the coil end of the stator 1 of this embodiment.
- the first connection end 11 and the second connection end 12 of the unit coil 7 are arranged separately at both ends of the unit coil 7.
- the 1st and 2nd connection edge parts 11 and 12 are represented by the same form mutually.
- two types of unit coils 7 are prepared in advance in order to connect the connection end portions 11 and 12 between adjacent unit coils 7 without using a bus bar or the like. That is, one type of unit coil 7 extends the first connection end 11 longer and shortens the second connection end 12. The other type of unit coil 7 shortens the first connection end 11 and extends the second connection end 12 longer.
- FIG. 11 is a flowchart showing a series of steps for the manufacturing method. 12 to 15 schematically show the state of each process in cross-sectional views.
- the flat wire 10 is wound a plurality of times using a winding die 31.
- the winding die 31 is formed so that one step portion 31a is formed on the outer periphery, and a small diameter winding drum portion 31b and a large diameter winding drum portion 31c having different sizes sequentially in the axial direction with the step portion 31a as a boundary. It has a substantially prismatic shape.
- a stepped step that matches the width of the flat conducting wire 10 is formed.
- each square indicates a cross section of the flat conducting wire 10 (hatching is omitted), and the number in the cross section means the number of turns. The same applies to the other FIGS.
- the wound rectangular conductor wire 10 is removed from the winding die 31 as shown in FIG. 13.
- the outer peripheral shape of the winding die 31 is transferred to the wound flat rectangular wire 10.
- a portion wound around the small diameter winding body 31b is referred to as a small coil portion 27, and a portion wound around the large diameter winding portion 31c is referred to as a large coil portion 28.
- the small coil portion 27 is moved into the large coil portion 28 and the connecting portion 26 is plastically deformed relatively as shown in FIGS. Move.
- the small coil portion 27 and the large coil portion 28 are compressed by a pair of compression plates 36 and 37, thereby moving both the coil portions 27 and 28 relatively.
- the unit coil 7 including the outer layer coil 8 and the inner layer coil 9 wound concentrically can be manufactured as shown in FIG.
- the winding start end portion 8a of the outer layer coil 8 is located on one end side in the axial direction of the unit coil 7 as indicated by “1”, and “10” is also placed on the other end side in the axial direction.
- the winding end 9a of the inner layer coil 9 is located.
- the winding start end portion 8 a and the winding end end portion 9 a become a pair of connection end portions 11 and 12 in one unit coil 7.
- each of the connection end portions 11 and 12 has one longer and the other shorter for connection between the adjacent unit coils 7. Is set to the length.
- the distributed winding type multiphase coil 5 is configured by a plurality of unit coils 7 being assembled and connected to the plurality of slots 3 of the stator core 4.
- the multiphase coil 5 includes coils having different phases, for example, a U phase coil, a V phase coil, and a W phase coil.
- Each phase coil is configured by connecting a plurality of unit coils 7 in series with each other.
- the first connection ends 11 of the adjacent unit coils 7 may be connected to each other, and the second connection ends 12 may be connected to each other.
- the stator 1 of this embodiment it is not necessary to connect the outer layer coil 8 and the inner layer coil 9 constituting each unit coil 7 to each other. For this reason, in order to constitute the multiphase coil 5, the connection work of the unit coil 7 can be simplified. Moreover, the bulk of the coil end in the stator 1 can be reduced by the amount that the connection portions of the connection end portions 11 and 12 can be reduced for each unit coil 7. As a result, the heights of the coil ends at the upper and lower ends of the stator 1 can be made equal to each other.
- connection portion of the first connection end portion 11 and the connection portion of the second connection end portion 12 between the adjacent unit coils 7 constituting the coil of the same phase The stator core 4 is arranged separately at an inner peripheral position and an outer peripheral position. For this reason, about the connection part of each connection end part 11 and 12 which can be made plural, the space
- the outer layer coil 8 and the inner layer coil 9 can be easily concentrically wound by the single flat wire 10 connected.
- the unit coil 7 formed by concentrically winding the outer layer coil 8 and the inner layer coil 9 can be easily manufactured by one flat conducting wire 10.
- FIG. 16 is a perspective view showing the stator 41 of this embodiment.
- FIG. 17 is a perspective view showing the back side of one unit coil 7.
- the stator 1 of this embodiment is different from the first embodiment in the arrangement of the connection end portions 11 and 12. That is, as shown in FIG. 17, in the unit coil 7 of this embodiment, the winding start end portion 9 b of the inner layer coil 9 and the winding end end portion 8 b of the outer layer coil 8 are the first connection ends of the unit coil 7.
- the part 11 and the second connection end part 12 are configured. Both the first connection end 11 and the second connection end 12 are arranged at one of the two ends in the axial direction of the unit coil 7, that is, the front end.
- both the first connection end 11 and the second connection end 12 provided in each unit coil 7 are arranged on the upper end surface in the axial direction of the stator core 4.
- both the first connection end portion 11 of the inner layer coil 9 and the second connection end portion 12 of the outer layer coil 8 are arranged at positions near the outer periphery on the upper end surface of the stator core 4.
- the first connection end portions 11 are connected to each other between the adjacent unit coils 7 constituting the in-phase coil (for example, “U-phase coil”) among the plurality of unit coils 7, and the second connection end portions. 12 are connected to each other.
- FIG. 18 is a flowchart showing a series of steps for the manufacturing method. 19 to 22 schematically show the state of each process in cross-sectional views.
- the rectangular conductor wire 10 is wound a plurality of times using an inner layer winding die 38 having a substantially prismatic shape.
- the inner layer mold 38 has a stepped step on the outer periphery thereof that matches the width of the flat conducting wire 10.
- an outer layer winding die 39 is waiting below the inner layer winding die 38.
- an inner layer coil 46 is formed by spirally winding a single flat conducting wire 10 around the outer periphery of the inner layer winding die 38 from the proximal end side toward the distal end side.
- each square indicates a cross section of the flat conducting wire 10 (hatching is omitted), and the number in the cross section means the number of turns. The same applies to the other FIGS.
- the outer layer winding mold 39 having a substantially rectangular tube shape is moved to the outside (outer periphery) of the inner layer coil 46 as shown in FIG. .
- the outer layer mold 39 has a stepped step that matches the width of the flat conducting wire 10 on the outer periphery thereof.
- the outer layer winding mold 39 is connected via a connecting portion 47 extending from the winding end portion 46a of the inner layer coil 46.
- An outer layer coil 48 is formed by winding the rectangular wire 10 around the outer periphery a plurality of times. At this time, the flat conducting wire 10 is spirally wound in the direction opposite to the winding advance direction of the inner layer coil 46 from the distal end side to the proximal end side of the outer layer winding die 39.
- the formed inner layer coil 46 and outer layer coil 48 are removed from the inner layer winding mold 38 and the outer layer winding mold 39.
- one unit coil 7 including the inner layer coil 46 and the outer layer coil 48 wound concentrically can be manufactured.
- the winding start end portion 46 b of the inner layer coil 46 is positioned at one end side in the axial direction of the unit coil 7 as indicated by “1”, and the outer layer coil 48 of the outer layer coil 48 is indicated as indicated by “10”.
- the winding end 48a is located.
- the winding start end portion 46 b and the winding end end portion 48 a become a pair of connection end portions 11 and 12 of one unit coil 7.
- each of the connection end portions 11 and 12 has one longer and the other shorter for connection between the adjacent unit coils 7. Is set to the length.
- each of the connection end portions 11 and 12 is long for the connection between adjacent unit coils 7 so that the other is short. Is set to the length.
- the distributed winding type multiphase coil 5 is configured by a plurality of unit coils 7 being assembled and connected to the plurality of slots 3 of the stator core 4. Is done.
- the multiphase coil 5 is composed of coils having different phases.
- Each phase coil is configured by connecting a plurality of unit coils 7 in series with each other.
- the first connection ends 11 of the adjacent unit coils 7 may be connected to each other, and the second connection ends 12 may be connected to each other. Therefore, unlike the stator using the conventional unit coil, in the stator 1 of this embodiment, it is not necessary to connect the outer layer coil 8 and the inner layer coil 9 constituting each unit coil 7 to each other.
- connection work of the unit coil 7 can be simplified.
- the bulk of the coil end in the stator 41 can be reduced by the amount that the connection portions of the connection ends 11 and 12 can be reduced for each unit coil 7.
- the heights of the upper and lower coil ends of the stator 41 can be made equal to each other.
- connection portion of the first connection end portion 11 and the connection portion of the second connection end portion 12 between the adjacent unit coils 7 constituting the coil of the same phase The stator core 4 is disposed together at a position near the outer periphery. For this reason, a space inside the multiphase coil 5 can be secured for the upper end surface of the stator core 4. Further, since the connection portions of the first and second connection end portions 11 and 12 are both aligned on the substantially same circumference at a position near the outer periphery of the stator core 4, it is possible to improve the efficiency of the connection work.
- the outer layer coil 8 and the inner layer coil 9 can be easily concentrically wound by the single flat wire 10 connected.
- the unit coil 7 formed by concentrically winding the outer layer coil 8 and the inner layer coil 9 can be easily manufactured by one flat conducting wire 10.
- the unit coil 7 formed by concentrically winding two layer coils of the outer layer coil 8 and the inner layer coil 9 is used.
- a unit coil formed by concentrically winding three layer coils of an outer layer coil, a middle layer coil, and an inner layer coil or use a unit coil formed by concentrically winding four phase coils. You can also.
- the manufacturing method of the unit coil 7 formed by concentrically winding the two layer coils of the outer layer coil 8 and the inner layer coil 9 has been described.
- the present invention can also be applied to a unit coil manufacturing method in which layer coils are concentrically wound.
- connection portions of the first and second connection end portions 11 and 12 are arranged together at positions near the outer periphery of the stator core 4.
- the present invention can be used for in-vehicle motors such as hybrid cars and electric cars.
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Abstract
Description
以下、本発明におけるステータ及びそれに使用される単位コイルの製造方法を具体化した第1実施形態につき図面を参照して詳細に説明する。
次に、本発明におけるステータ及びそれに使用される単位コイルの製造方法を具体化した第2実施形態につき図面を参照して詳細に説明する。
3 スロット
4 ステータコア
5 多相コイル
7 単位コイル
7A 単位コイル
7B 単位コイル
8 外層コイル
8a 巻き始め端部
8b 巻き終わり端部
9 内層コイル
9a 巻き終わり端部
9b 巻き始め端部
10 平角導線
11 第1の接続端部
12 第2の接続端部
26 つなぎ部
27 小コイル部
28 大コイル部
31 巻き型
31a 段部
31b 小径巻き胴部
31c 大径巻き胴部
38 内層巻き型
39 外層巻き型
41 ステータ
46 内層コイル
46a 巻き終わり端部
46b 巻き始め端部
47 つなぎ部
48 外層コイル
48a 巻き終わり端部
Claims (6)
- 複数のスロットを有するステータコアと、
前記ステータコアに設けられる分布巻きタイプの多相コイルと、
前記多相コイルは、平角導線を複数回巻き回すことにより形成される複数の単位コイルを含み、前記複数の単位コイルが前記ステータコアの前記複数のスロットに組み付けられて接続されることと
を備えたステータにおいて、
前記単位コイルが、同芯巻きされた複数の層コイルを含み、前記複数の層コイルが、連続した1本の平角導線により形成されることと、
前記複数の層コイルが、最外の層コイルと最内の層コイルとを含み、前記最外の層コイルの巻き始め端部又は巻き終わり端部と、前記最内の層コイルの巻き終わり端部又は巻き始め端部とが、前記単位コイルの第1の接続端部と第2の接続端部を構成することと、
前記第1の接続端部と前記第2の接続端部が、前記単位コイルの軸線方向における2つの端に分かれて配置されることと
を備えたことを特徴とするステータ。 - 前記各単位コイルに設けられる前記第1の接続端部と前記第2の接続端部の両方が、前記ステータコアの軸線方向における一方の端面上に配置されると共に、前記第1の接続端部と前記第2の接続端部のうち一方が前記ステータコアの内周寄り位置に配置され、他方が前記ステータコアの外周寄り位置に配置されることと、
前記複数の単位コイルのうち、同相を構成する隣り合う単位コイル同士の前記第1の接続端部が互いに接続され、同じく同相を構成する隣り合う単位コイル同士の前記第2の接続端部が互いに接続されることと
を備えたことを特徴とする請求項1に記載のステータ。 - 複数のスロットを有するステータコアと、
前記ステータコアに設けられる分布巻きタイプの多相コイルと、
前記多相コイルは、平角導線を複数回巻き回すことにより形成される複数の単位コイルを含み、前記複数の単位コイルが前記ステータコアの前記複数のスロットに組み付けられて接続されることと
を備えたステータにおいて、
前記単位コイルが、同芯巻きされた複数の層コイルを含み、前記複数の層コイルが、連続した1本の平角導線により形成されることと、
前記複数の層コイルが、最外の層コイルと最内の層コイルとを含み、前記最外の層コイルの巻き始め端部又は巻き終わり端部と、前記最内の層コイルの巻き終わり端部又は巻き始め端部とが、前記単位コイルの第1の接続端部と第2の接続端部を構成することと、
前記第1の接続端部と前記第2の接続端部の両方が、前記単位コイルの軸線方向における2つの端の一方に配置されることと
を備えたことを特徴とするステータ。 - 前記各単位コイルに設けられる前記第1の接続端部と前記第2の接続端部の両方が、前記ステータコアの軸線方向における一方の端面上に配置されると共に、前記第1の接続端部と前記第2の接続端部の両方が前記ステータコアの内周寄り位置又は外周寄り位置に配置されることと、
前記複数の単位コイルのうち、同相を構成する隣り合う単位コイル同士の前記第1の接続端部が互いに接続され、同じく同相を構成する隣り合う単位コイル同士の前記第2の接続端部が互いに接続されることと
を備えたことを特徴とする請求項3に記載のステータ。 - 請求項1に記載のステータに使用される単位コイルの製造方法であって、
外周に少なくとも一つの段部が形成され、前記段部を境に軸線方向に順次サイズの異なる巻き胴部が複数連なるように形成された略角柱形をなす巻き型を使用し、前記巻き型の一端側から他端側へ前記各巻き胴部の外周に1本の平角導線を螺旋状に巻き回すと共に、前記段部の外周では前記平角導線を延ばしてつなぎ部を形成する巻回工程と、
次に、前記巻き回された平角導線を前記巻き型から取り外す離型工程と、
次に、前記複数の巻き胴部のうち、小さい巻き胴部にて巻かれた小コイル部を、大きい巻き胴部にて巻かれた大コイル部の内側へ、前記つなぎ部を塑性変形させることにより相対的に移動させる移動工程と
を備え、これにより同芯巻きされた複数の層コイルを含む単位コイルを製造することを特徴とする単位コイルの製造方法。 - 請求項3に記載のステータに使用される単位コイルの製造方法であって、
略角柱形をなす内層巻き型の一端側から他端側へその外周に1本の平角導線を螺旋状に巻き回すことにより内層コイルを形成する内層巻回工程と、
次に、前記内層コイルの外側へ、略角筒形をなす外層巻き型を移動させる外層巻き型移動工程と、
次に、前記内層コイルの巻き終わり端部を延ばしたつなぎ部を介して前記外層巻き型の一端側から他端側へその外周に前記平角導線を、前記内層コイルの巻き進み方向とは逆方向へ螺旋状に巻き回すことにより外層コイルを形成する外層巻回工程と、
次に、前記形成された内層コイル及び外層コイルを前記内層巻き型及び前記外層巻き型から取り外す離型工程と
を備え、これにより同芯巻きされた2つの層コイルを含む単位コイルを製造することを特徴とする単位コイルの製造方法。
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EP10835272.5A EP2418758A4 (en) | 2010-06-11 | 2010-06-11 | Stator and method for manufacturing unit coil used for same |
US13/131,245 US8587177B2 (en) | 2010-06-11 | 2010-06-11 | Stator and method of manufacturing unit coil to be used therein |
CN201080017079.9A CN102668332B (zh) | 2010-06-11 | 2010-06-11 | 定子以及用于定子的单位线圈的制造方法 |
PCT/JP2010/059943 WO2011155061A1 (ja) | 2010-06-11 | 2010-06-11 | ステータ及びそれに使用される単位コイルの製造方法 |
JP2011505291A JP5234173B2 (ja) | 2010-06-11 | 2010-06-11 | ステータ及びそれに使用される単位コイルの製造方法 |
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EP (1) | EP2418758A4 (ja) |
JP (1) | JP5234173B2 (ja) |
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EP2418758A4 (en) | 2017-03-15 |
CN102668332A (zh) | 2012-09-12 |
US8587177B2 (en) | 2013-11-19 |
EP2418758A1 (en) | 2012-02-15 |
CN102668332B (zh) | 2015-04-08 |
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US20120007460A1 (en) | 2012-01-12 |
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