WO2014185376A1 - 回転電機用のステータの製造方法 - Google Patents
回転電機用のステータの製造方法 Download PDFInfo
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- WO2014185376A1 WO2014185376A1 PCT/JP2014/062583 JP2014062583W WO2014185376A1 WO 2014185376 A1 WO2014185376 A1 WO 2014185376A1 JP 2014062583 W JP2014062583 W JP 2014062583W WO 2014185376 A1 WO2014185376 A1 WO 2014185376A1
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- WIPO (PCT)
- Prior art keywords
- coil
- stator
- teeth
- final coil
- outer peripheral
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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
- H02K15/08—Forming windings by laying conductors into or around core parts
- H02K15/085—Forming windings by laying conductors into or around core parts by laying conductors into slotted stators
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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
- H02K15/0056—Manufacturing winding connections
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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
- H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
- H02K15/024—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies with slots
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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
- H02K15/06—Embedding prefabricated windings in machines
- H02K15/062—Windings in slots; salient pole windings
Definitions
- the present invention relates to a method of manufacturing a stator for a rotating electrical machine by arranging a coil in a stator core.
- Patent Document 1 discloses a motor stator manufacturing apparatus in which a plurality of trapezoidal coils formed by bending a rectangular conductor having a rectangular cross section are inserted into a plurality of teeth in a stator core. This manufacturing apparatus has a coil shape regulating member that regulates the trapezoidal coil to an obliquely deformed state. And the trapezoid coil is inserted in the tooth in the state which prevented the twist by the coil shape control member.
- the trapezoidal coil is always restricted to the obliquely deformed state by the coil shape restricting member until the trapezoidal coil is inserted into the regular position in the tooth. Therefore, when it is desired to increase the circumferential width of the proximal end portion of the tooth, it is difficult to insert a trapezoidal coil into the tooth depending on Patent Document 1.
- the present invention has been made in view of such a background, and even if the circumferential width of the base end side portion of the teeth is increased, the rotation that can smoothly arrange the final coil disposed at the end of the teeth is possible. It was obtained in an attempt to provide a method for manufacturing a stator for an electric machine.
- One aspect of the present invention is a method of manufacturing a stator for a rotating electrical machine by arranging a coil in a stator core, In the stator core, the plurality of teeth formed radially on the inner peripheral side of the annular yoke portion are connected to the tip parallel side surface formed at the tip side portion and having a constant circumferential width, and the tip parallel side surface.
- An intermediate inclined side surface that is formed in such a manner that the width in the circumferential direction increases toward the outer peripheral side, and a proximal parallel side surface that is formed on the proximal end side portion connected to the intermediate inclined side surface and has a constant circumferential width.
- a method of arranging a final coil arranged last is devised on a tooth having a tip parallel side surface, an intermediate inclined side surface, and a base end parallel side surface.
- the final coil is deformed, and the outer peripheral end of the one-side conductor portion located on one side in the circumferential direction of the final coil, and the periphery of the final coil.
- An acute corner is formed at the inner peripheral end of the other conductor portion located on the other side in the direction.
- an obtuse corner is formed at the inner peripheral end of the one-side conductor portion and the outer peripheral end of the other-side conductor portion.
- the amount by which the final coil is deformed is an amount by which the one-side conductor portion can be inserted into the one-side slot.
- the outer peripheral side edge part of one side conductor part is inserted in the opening part of the one side slot located in the circumferential direction one side with respect to the teeth.
- the deformed state of the final coil is maintained, and the outer peripheral side end of the one side conductor portion is inserted to the boundary position between the intermediate inclined side surface and the base end parallel side surface in the one side slot. Moreover, the outer peripheral side edge part of the other side conductor part is inserted in the opening part of the other side slot located in the circumferential direction other side with respect to the teeth.
- the second insertion step by disposing the final coil on the tooth in a deformed state, the one-side conductor portion of the final coil does not interfere with the tooth or the coil disposed on the previous tooth. Can do.
- the deformed state of the final coil is returned to the initial state without the original deformation starting from the outer peripheral end of the one-side conductor portion.
- the outer peripheral side end of the other side conductor portion is inserted to the boundary position between the intermediate inclined side surface and the base end parallel side surface in the other side slot.
- the other side conductor portion of the final coil can be prevented from interfering with the coil initially arranged in the tooth by disposing the final coil on the tooth while returning the deformation of the final coil.
- the fourth insertion step after the final coil faces the teeth, the one-side conductor portion and the other-side conductor portion are moved radially outward and simultaneously inserted into the one-side slot and the other-side slot, respectively. To do.
- the base end side portion of the tooth has a base end parallel side surface with a large circumferential width
- the first coil to the fourth insertion step are performed to interfere with the tooth in the tooth. It can be arranged easily avoiding.
- the tip parallel side surface on the tooth By forming the tip parallel side surface on the tooth, the magnetic flux passing through the tooth when energizing the coil can be less likely to be saturated at the tip of the tooth. Further, by forming the base end parallel side surface on the tooth, the width in the circumferential direction at the base end side portion of the tooth can be increased, and more magnetic flux can pass therethrough. And the performance of a rotary electric machine can be improved by using the stator core which has the said teeth shape. Therefore, according to the above method for manufacturing a stator for a rotating electrical machine, even when the circumferential width of the proximal end portion of the tooth is increased, the final coil disposed last in the tooth can be arranged smoothly. it can.
- Explanatory drawing which shows the state which arrange
- Explanatory drawing which shows the state which arrange
- Explanatory drawing which shows the state which arrange
- Explanatory drawing which shows the state which arrange
- Explanatory drawing which shows the state which has arrange
- Explanatory drawing which shows the state which has arrange
- Explanatory drawing which shows the stator concerning an Example.
- Explanatory drawing which shows notionally the operation
- the perspective view which shows the holding part in the movable jig part of the assembly
- the outer peripheral side end of the one side conductor portion and the outer peripheral side end of the other side conductor portion are the yoke side when disposed on the outer peripheral side of the teeth of the stator core.
- the coils arranged in the teeth prior to the final coil with respect to the stator core can be sequentially arranged in the circumferential direction for each of the teeth of the stator core.
- the final coil has a rectangular wire on the inner and outer circumferences along the side surface shape of the teeth by the tip parallel side surface, the intermediate inclined side surface, and the base end parallel side surface. It may be formed by being wound around a plurality of layers. In this case, the space factor of the coil in the stator core slot can be increased by using the rectangular wire.
- the final coil may be arranged with respect to an insulator made of an insulating resin, which is first attached to the teeth of the stator core. In this case, the final coil separated from the insulator can be easily deformed.
- an assembly having a movable jig part that holds the final coil so as to face the inner peripheral side of the teeth, and a base jig part that the movable jig part is movably arranged.
- the movable jig is moved by moving a roller provided in the movable jig section along a guide rail provided in the base jig section.
- positions the last coil can be appropriately formed by moving a roller along a guide rail.
- the stator 1 is manufactured by arranging the coil 3 on the stator core 2 as shown in FIG.
- a plurality of teeth 21 that are radially formed on the inner peripheral side of the annular yoke portion 23 are formed on the tip side portion and have a constant circumferential width.
- the base end parallel side surface 213 has a constant width.
- the final coil 3C to be disposed on the tooth 21 is disposed on the tooth 21.
- the final coil 3C is deformed into a rhombus shape, and the outer peripheral side end 321 of the one-side conductor portion 32A located on the one side C1 in the circumferential direction of the final coil 3C, and the final An acute corner is formed on the inner peripheral end 323 of the other conductor portion 32B located on the other circumferential side C2 of the coil 3C, and the outer peripheral end 321 of the one conductor portion 32A is connected to the teeth 21. It inserts into the opening part of 22 A of one side slots located in the circumferential direction one side C1.
- the deformed state of the final coil 3C is maintained, and the outer peripheral side end 321 of the one side conductor portion 32A is connected to the intermediate inclined side surface 212 and the base end in the one side slot 22A.
- the outer peripheral side edge part 321 of the other side conductor part 32B is inserted in the opening part of the other side slot 22B located in the circumferential direction other side C2 with respect to the teeth 21.
- the deformation of the final coil 3 ⁇ / b> C is restored from the outer peripheral side end 321 of the one side conductor portion 32 ⁇ / b> A, and the outer periphery of the other side conductor portion 32 ⁇ / b> B is restored.
- the side end portion 321 is inserted to the boundary position between the intermediate inclined side surface 212 and the base end parallel side surface 213 in the other side slot 22B.
- the final coil 3C is directly opposed to the teeth 21, and the one side conductor portion 32A and the other side conductor portion 32B are respectively connected to the one side slot 22A and the other side slot. Insert into 22B at the same time.
- “Directly facing” means facing from the front.
- the stator 1 of this example is used for a three-phase rotating electrical machine, and includes a U-phase, V-phase, and W-phase three-phase coils 3U, 3V, and 3W, and a plurality of teeth in the stator core 2.
- 21 is repeatedly arranged a plurality of times in the same arrangement order.
- Each phase of the coil 3 includes a coil main body 31 formed by winding a rectangular wire 301 a plurality of times, one end 33 ⁇ / b> A drawn to one axial side L ⁇ b> 1 of the stator core 2 at one end of the coil main body 31, and the coil main body 31.
- the other end portion 33B of the stator core 2 is pulled out to one axial side L1 of the stator core 2.
- the axial direction L of the stator core 2 extends across the outer side in the axial direction L of the coil 3 of the other phase with respect to the coil body 31 so that the one end 33A of the coil 3 of each phase is aligned with the other end 33B of the coil 3 of the same phase. It is pulled out in the direction orthogonal to.
- an intermediate position 331 of a portion passed from the coil 3 to the adjacent coil 3 as a connecting wire is bent outward.
- each phase of the continuous coil is joined to each other by one end portion 33A and the other end portion 33B to form U-phase, V-phase, and W-phase continuous coils. Further, each phase of the continuous coil is star-connected, and a neutral point 34 in which the one end 33A of each phase coil 3 is joined to each other is formed at one end 33A of each phase continuous coil. The other end portion 33B of the continuous coil 3 is formed with a lead portion 35 connected to the outside.
- the rectangular wire 301 forming the coil 3 of each phase has a substantially rectangular cross-sectional shape, and is formed by covering the outer periphery of a conductor layer made of a copper material or the like with a coating layer made of a resin material or the like. Yes.
- the cross-sectional shape of the flat wire 301 may be a flat shape having flat surfaces parallel to each other.
- the coil 3 of each phase in this example is a concentrated winding coil formed by drawing out one end 33A and the other end 33B from a coil body 31 formed by winding a rectangular wire 301 a plurality of times.
- the coils 3 for each phase are individually attached to the outer periphery of the teeth 21 so as to be disposed in the slots 22A and 22B located on both sides of the teeth 21 in the circumferential direction.
- the coil body 31 of each phase of the coil 3 expands toward the outer peripheral side along the side shape of the tooth 21 by the tip parallel side surface 211, the intermediate inclined side surface 212 and the base end parallel side surface 213. It is formed in the shape of a square ring with a diameter.
- the coil body 31 of each phase coil 3 is formed by winding a rectangular wire 301 in a rectangular shape with a portion facing the distal end parallel side surface 211 and a portion facing the proximal end parallel side surface 213, and an intermediate inclined side surface 212. Is formed by winding a flat wire 301 in a trapezoidal shape.
- the coil body 31 in each phase coil 3 is formed by winding a rectangular wire 301 in two layers on the inner and outer peripheries.
- the final coil 3C that is deformed in the first insertion step is strictly close to a rhombus shape.
- Transformed into The coils 3 of each phase are disposed on the outer periphery of an insulator 4 that is a resin that insulates the stator core 2.
- the insulator 4 holds the coil body 31 on its outer periphery and is attached to the teeth 21.
- the movable jig portion 52 that holds the final coil 3 ⁇ / b> C and is disposed to face the inner peripheral side with respect to the teeth 21,
- An assembling jig 5 having a base jig portion 51 disposed so as to be movable is used.
- the movable jig portion 52 has a grip portion 521 that supports the upper and lower conductor portions 32C of the intermediate coil 3B.
- the movable jig portion 52 can be rotated with respect to the base jig portion 51 by a rotation shaft portion 522, and is linear. It can slide with respect to the base jig part 51 with a guide.
- the base jig portion 51 is provided with two guide rails (guide grooves) 511 for forming the movement path X of the intermediate coil 3 ⁇ / b> B when being arranged on the teeth 21 of the stator core 2.
- the movable jig portion 52 is provided with two rollers 523 arranged on the two guide rails 511.
- the movable jig portion 52 when the movable jig portion 52 is slid by the linear guide, the movable jig portion 52 rotates about the rotation shaft portion 522, and the two By moving the roller 523 along the two guide rails 511, the grip portion 521 of the movable jig portion 52 can be moved along the movement path X of the intermediate coil 3B. Then, the intermediate coil 3B can be disposed on the tooth 21 by performing the first to fourth insertion steps.
- the position of the biaxial moving part is controlled and the coils are arranged on the teeth. Therefore, when the assembly position of the coil by the assembly jig has changed when the assembly of the coil is repeated using the assembly jig, a program for controlling the position of the biaxial moving part, etc. It was necessary to correct each time the assembly position changed.
- the position of the base jig part 51 provided with the guide rail 511 can be adjusted with respect to the attachment part to which the base jig part 51 is attached. be able to.
- the clearance formed between the through hole and the screw is changed to a guide rail.
- the clearance formed between the roller 51 and the roller 523 can be made larger.
- the insulator 4 for holding the final coil 3C finally disposed on the tooth 21 of the stator core 2 is attached to the tooth 21 (see FIG. 6).
- the three-phase coils 3U, 3V, 3W held on the outer periphery of the insulator 4 are sequentially arranged around the circumferential direction (arrangement direction) D in each of the teeth 21 of the stator core 2 (see FIG. 7).
- the circumferential direction D in which the three-phase coils 3U, 3V, and 3W are sequentially arranged one by one is the same as the other circumferential side C2.
- the first coil 3 ⁇ / b> A initially disposed on the teeth 21 of the stator core 2 does not interfere with the adjacent other-phase coil 3. Therefore, the stator core 2 can be directly attached to the inner peripheral side of the tooth 21, moved to the outer peripheral side in a state parallel to the radial direction, and attached to the tooth 21.
- the first coil 3A of this example is subjected to the first to fourth insertion steps in the same manner as the intermediate coil 3B described later. 21.
- the coils 3 ⁇ / b> A and 3 ⁇ / b> C arranged first and last on the teeth 21 of the stator core 2 and the intermediate coil 3 ⁇ / b> B arranged second on the teeth 21 are for forming a neutral point 34. .
- the second and subsequent intermediate coils 3B arranged with respect to the teeth 21 of the stator core 2 are inclined and opposed to the teeth 21, and are arranged to face the teeth 21 while returning the inclination angle. (See FIG. 1).
- This intermediate coil 3 ⁇ / b> B is disposed on the tooth 21 in a state wound around the outer periphery of the insulator 4.
- the final coil 3C is disposed on the teeth 21 of the stator core 2, the following first to fourth insertion steps are performed. 1 to 5, the movement path X of the final coil 3C when arranged on the tooth 21 is shown with reference to the outer peripheral side center portion 322 of the final coil 3C.
- the final coil 3C is deformed into a rhombus shape, and the outer peripheral side end 321 of the one-side conductor portion 32A located on the one side C1 in the circumferential direction of the final coil 3C; An acute corner is formed on the inner peripheral end 323 of the other conductor portion 32B located on the other circumferential side C2 of the final coil 3C.
- an obtuse angled corner is formed at the inner peripheral side end 323 of the one side conductor portion 32A and the outer peripheral side end 321 of the other side conductor portion 32B.
- the amount by which the final coil 3C is deformed is an amount by which the one-side conductor portion 32A can be inserted into the one-side slot 22A.
- the outer peripheral end 321 of the one-side conductor portion 32A is inserted into the opening of the one-side slot 22A located on the one circumferential side C1 with respect to the tooth 21.
- the deformed state of the final coil 3C is maintained, and the outer peripheral side end 321 of the one-side conductor portion 32A is parallel to the intermediate inclined side surface 212 and the base end in the one-side slot 22A. Insert up to the boundary with the side surface 213. Further, the outer end 321 of the other side conductor portion 32B is inserted into the opening of the other side slot 22B located on the other side C2 in the circumferential direction with respect to the tooth 21.
- the second insertion step by placing the final coil 3C on the tooth 21 in a deformed state, the one-side conductor portion 32A of the final coil 3C is disposed on the tooth 21 or on the tooth 21 before the coil 3B. Can be prevented from interfering with.
- the deformed state of the final coil 3 ⁇ / b> C is returned from the outer peripheral side end 321 of the one-side conductor portion 32 ⁇ / b> A to the initial state without the original deformation.
- the outer peripheral side end portion 321 of the other side conductor portion 32B is inserted to the boundary position between the intermediate inclined side surface 212 and the base end parallel side surface 213 in the other side slot 22B.
- the other side conductor portion 32B of the final coil 3C is prevented from interfering with the coil initially arranged on the tooth 21 by disposing the final coil 3C on the tooth 21 while returning the deformation of the final coil 3C. Can do.
- the final coil 3C is removed by performing the first to fourth insertion steps.
- the teeth 21 can be easily arranged avoiding interference. Further, by forming the tip parallel side surface 211 on the tooth 21, the magnetic flux passing through the tooth 21 when the coil is energized can be less likely to be saturated at the tip portion of the tooth 21. Further, by forming the base end parallel side surface 213 on the tooth 21, the circumferential width of the base end side portion of the tooth 21 can be increased, and more magnetic flux can pass therethrough. And the performance of a rotary electric machine can be improved by using the stator core 2 which has the said teeth 21 shape.
- the manufacturing method of the stator 1 for the rotating electrical machine of the present example even if the circumferential width of the proximal end portion of the tooth 21 is increased, the final coil 3 ⁇ / b> C disposed at the end of the tooth 21 is disposed. Can be made smooth.
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- Manufacturing & Machinery (AREA)
- Power Engineering (AREA)
- Manufacture Of Motors, Generators (AREA)
- Insulation, Fastening Of Motor, Generator Windings (AREA)
Abstract
Description
例えば、特許文献1においては、固定子コアにおける複数のティースに、矩形断面の平角導体を曲げ加工して形成された複数の台形コイルを挿入するモータ固定子の製造装置が開示されている。この製造装置は、台形コイルを斜め変形状態に規制するコイル形状規制部材を有している。そして、コイル形状規制部材によって巻きひねりを防止した状態で、台形コイルをティースに挿入している。
上記ステータコアにおいて、円環状のヨーク部の内周側に放射状に形成された複数のティースは、先端側部分に形成されて周方向の幅が一定である先端平行側面と、該先端平行側面に繋がって形成されて外周側へ行くに連れて周方向の幅が大きくなる中間傾斜側面と、該中間傾斜側面から繋がった基端側部分に形成されて周方向の幅が一定である基端平行側面とを有しており、
上記ステータコアにおける上記ティースに対して最終コイルを配置するに当たり、
該最終コイルを変形させて、該最終コイルの周方向一方側に位置する一方側導体部分の外周側端部と、該最終コイルの周方向他方側に位置する他方側導体部分の内周側端部とに鋭角状の角部を形成し、該一方側導体部分の外周側端部を、上記ティースに対する周方向一方側に位置する一方側スロットの開口部へ挿入する第1挿入工程と、
上記最終コイルの変形状態を維持して、上記一方側導体部分の外周側端部を上記一方側スロットにおける上記中間傾斜側面と上記基端平行側面との境界位置まで挿入するとともに、上記他方側導体部分の外周側端部を上記ティースに対する周方向他方側に位置する他方側スロットの開口部へ挿入する第2挿入工程と、
上記一方側導体部分の外周側端部を起点に上記最終コイルの変形を元に戻して、上記他方側導体部分の外周側端部を上記他方側スロットにおける上記中間傾斜側面と上記基端平行側面との境界位置まで挿入する第3挿入工程と、
上記最終コイルを上記ティースに対して対向させ、上記一方側導体部分及び上記他方側導体部分を、それぞれ上記一方側スロット及び上記他方側スロットへ同時に挿入する第4挿入工程と、を行うことを特徴とする回転電機用のステータの製造方法にある。
最終コイルをティースに配置するに当たっては、まず、第1挿入工程として、最終コイルを変形させて、最終コイルの周方向一方側に位置する一方側導体部分の外周側端部と、最終コイルの周方向他方側に位置する他方側導体部分の内周側端部とに鋭角状の角部を形成する。このとき、一方側導体部分の内周側端部と、他方側導体部分の外周側端部とには鈍角状の角部が形成される。ここで、最終コイルを変形させる量は、一方側導体部分を一方側スロットに挿入することができる量とする。そして、一方側導体部分の外周側端部を、ティースに対する周方向一方側に位置する一方側スロットの開口部へ挿入する。
こうして、ティースの基端側部分に、周方向の幅が大きい基端平行側面が形成されている場合であっても、第1~第4挿入工程を行うことによって最終コイルをティースに、干渉を避けて容易に配置することができる。
それ故、上記回転電機用のステータの製造方法によれば、ティースの基端側部分における周方向の幅を大きくしても、ティースに最後に配置される最終コイルの配置を円滑にすることができる。
上記回転電機用のステータの製造方法において、上記一方側導体部分の外周側端部及び上記他方側導体部分の外周側端部とは、上記ステータコアのティースの外周側に配置された際のヨーク側の端部のことをいう。
上記ステータコアに対して上記最終コイルよりも先にティースに配置されるコイルは、ステータコアのティースの1つずつに周方向に回って順番に配置することができる。
この場合には、平角線を用いることによって、ステータコアのスロットにおけるコイルの占積率を高めることができる。
この場合には、インシュレータから分離された最終コイルを容易に変形させることができる。
この場合には、可動治具部及びベース治具部を有する組付治具を用いることにより、ティースに対する最終コイルの配置を一層容易に行うことができる。また、ガイドレールに沿ってローラを移動させることにより、最終コイルを配置する経路を適切に形成することができる。
本例の回転電機用のステータ1の製造方法においては、図7に示すごとく、ステータコア2にコイル3を配置してステータ1を製造する。
図1に示すごとく、ステータコア2において、円環状のヨーク部23の内周側に放射状に形成された複数のティース21は、先端側部分に形成されて周方向の幅が一定である先端平行側面211と、先端平行側面211に繋がって形成されて外周側へ行くに連れて周方向の幅が大きくなる中間傾斜側面212と、中間傾斜側面212から繋がった基端側部分に形成されて周方向の幅が一定である基端平行側面213とを有している。
図1に示すごとく、第1挿入工程においては、最終コイル3Cを菱形状に変形させて、最終コイル3Cの周方向一方側C1に位置する一方側導体部分32Aの外周側端部321と、最終コイル3Cの周方向他方側C2に位置する他方側導体部分32Bの内周側端部323とに鋭角状の角部を形成し、一方側導体部分32Aの外周側端部321を、ティース21に対する周方向一方側C1に位置する一方側スロット22Aの開口部へ挿入する。
図7に示すごとく、本例のステータ1は、3相回転電機に用いられるものであり、U相、V相、W相の3相のコイル3U,3V,3Wを、ステータコア2における複数のティース21に同じ配置順序で複数回繰り返し配置して形成されている。
各相のコイル3は、平角線301を複数回巻回して形成されたコイル本体31と、コイル本体31の一端においてステータコア2の軸方向一方側L1に引き出された一端部33Aと、コイル本体31の他端においてステータコア2の軸方向一方側L1に引き出された他端部33Bとを有している。各相のコイル3における一端部33Aは、同相のコイル3における他端部33Bに合わさるよう、他相のコイル3のコイル本体31に対する軸方向Lの外方を跨ぐ状態でステータコア2の軸方向Lに対して直交する方向に引き出されている。
本例の各相のコイル3は、平角線301を複数回巻回して形成されたコイル本体31から、一端部33A及び他端部33Bを引き出して形成された集中巻コイルである。各相のコイル3は、ティース21の周方向両側に位置するスロット22A,22Bに配置されるように、ティース21の外周に1つずつ単独で装着される。
各相のコイル3は、ステータコア2との絶縁を行う樹脂であるインシュレータ4の外周に配置される。インシュレータ4は、その外周にコイル本体31を保持し、ティース21に対して装着される。
また、ベース治具部51には、ステータコア2のティース21に配置する際の中間コイル3Bの移動経路Xを形成するための2本のガイドレール(ガイド溝)511が設けられている。また、可動治具部52には、2本のガイドレール511に配置される2つのローラ523が設けられている。
本例においては、まず、ステータコア2のティース21に最後に配置される最終コイル3Cを保持するためのインシュレータ4を、ティース21に装着しておく(図6参照)。そして、インシュレータ4の外周に保持された3相のコイル3U,3V,3Wを、ステータコア2のティース21の1つずつに周方向(配置方向)Dに回って順番に配置する(図7参照)。なお、3相のコイル3U,3V,3Wを1つずつ順番に配置する周方向Dは、周方向他方側C2と同じである。
本例においては、ステータコア2のティース21に最初と最後に配置されるコイル3A,3C、及びティース21に2番目に配置される中間コイル3Bは、中性点34を形成するためのものである。
まず、図1に示すごとく、第1挿入工程として、最終コイル3Cを菱形状に変形させて、最終コイル3Cの周方向一方側C1に位置する一方側導体部分32Aの外周側端部321と、最終コイル3Cの周方向他方側C2に位置する他方側導体部分32Bの内周側端部323とに鋭角状の角部を形成する。このとき、一方側導体部分32Aの内周側端部323と、他方側導体部分32Bの外周側端部321とには鈍角状の角部が形成される。ここで、最終コイル3Cを変形させる量は、一方側導体部分32Aを一方側スロット22Aに挿入することができる量とする。そして、一方側導体部分32Aの外周側端部321を、ティース21に対する周方向一方側C1に位置する一方側スロット22Aの開口部へ挿入する。
こうして、全ての3相のコイル3A,3B,3Cをステータコア2のティース21に対して配置する。
また、図7に示すごとく、ステータコア2においては、互いに合わさった、同相の各コイル3の一端部33Aと他端部33B、中性点34を形成する各一端部33A、リード部35を形成する各他端部33Bについて、溶接を行って接合することができる。
また、ティース21に先端平行側面211を形成することにより、コイルに通電を行う際にティース21を通過する磁束が、ティース21の先端部において飽和しにくくすることができる。また、ティース21に基端平行側面213を形成することにより、ティース21の基端側部分における周方向の幅を大きくして、磁束をより多く通過させることができる。そして、上記ティース21形状を有するステータコア2を用いることにより、回転電機の性能を向上させることができる。
Claims (4)
- ステータコアにコイルを配置して、回転電機用のステータを製造する方法であって、
上記ステータコアにおいて、円環状のヨーク部の内周側に放射状に形成された複数のティースは、先端側部分に形成されて周方向の幅が一定である先端平行側面と、該先端平行側面に繋がって形成されて外周側へ行くに連れて周方向の幅が大きくなる中間傾斜側面と、該中間傾斜側面から繋がった基端側部分に形成されて周方向の幅が一定である基端平行側面とを有しており、
上記ステータコアにおける上記ティースに対して最終コイルを配置するに当たり、
該最終コイルを変形させて、該最終コイルの周方向一方側に位置する一方側導体部分の外周側端部と、該最終コイルの周方向他方側に位置する他方側導体部分の内周側端部とに鋭角状の角部を形成し、該一方側導体部分の外周側端部を、上記ティースに対する周方向一方側に位置する一方側スロットの開口部へ挿入する第1挿入工程と、
上記最終コイルの変形状態を維持して、上記一方側導体部分の外周側端部を上記一方側スロットにおける上記中間傾斜側面と上記基端平行側面との境界位置まで挿入するとともに、上記他方側導体部分の外周側端部を上記ティースに対する周方向他方側に位置する他方側スロットの開口部へ挿入する第2挿入工程と、
上記一方側導体部分の外周側端部を起点に上記最終コイルの変形を元に戻して、上記他方側導体部分の外周側端部を上記他方側スロットにおける上記中間傾斜側面と上記基端平行側面との境界位置まで挿入する第3挿入工程と、
上記最終コイルを上記ティースに対して対向させ、上記一方側導体部分及び上記他方側導体部分を、それぞれ上記一方側スロット及び上記他方側スロットへ同時に挿入する第4挿入工程と、を行うことを特徴とする回転電機用のステータの製造方法。 - 請求項1に記載の回転電機用のステータの製造方法において、上記最終コイルは、上記先端平行側面、上記中間傾斜側面及び上記基端平行側面による上記ティースの側面形状に沿って、平角線を内外周に複数層に巻回して形成されていることを特徴とする回転電機用のステータの製造方法。
- 請求項1又は2に記載の回転電機用のステータの製造方法において、上記最終コイルは、上記ステータコアの上記ティースに最初に装着しておいた、絶縁樹脂からなるインシュレータに対して配置することを特徴とする回転電機用のステータの製造方法。
- 請求項1~3のいずれか一項に記載の回転電機用のステータの製造方法において、上記最終コイルを把持して上記ティースに対する内周側に対向して配置される可動治具部と、該可動治具部が移動可能に配設されたベース治具部とを有する組付治具を用い、
上記第1~第4挿入工程においては、上記ベース治具部に設けられたガイドレールに沿って、上記可動治具部に設けられたローラを移動させることにより、該可動治具部に把持した上記最終コイルを上記ティースへ配置することを特徴とする回転電機用のステータの製造方法。
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