WO2014129288A1 - モータの集中配電部材 - Google Patents
モータの集中配電部材 Download PDFInfo
- Publication number
- WO2014129288A1 WO2014129288A1 PCT/JP2014/052232 JP2014052232W WO2014129288A1 WO 2014129288 A1 WO2014129288 A1 WO 2014129288A1 JP 2014052232 W JP2014052232 W JP 2014052232W WO 2014129288 A1 WO2014129288 A1 WO 2014129288A1
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- WO
- WIPO (PCT)
- Prior art keywords
- holder
- bus bar
- distribution member
- auxiliary
- neutral point
- Prior art date
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Classifications
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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
- H02K3/28—Layout of windings or of connections between windings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/46—Fastening of windings on the stator or rotor structure
- H02K3/52—Fastening salient pole windings or connections thereto
- H02K3/521—Fastening salient pole windings or connections thereto applicable to stators only
- H02K3/522—Fastening salient pole windings or connections thereto applicable to stators only for generally annular cores with salient poles
-
- 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
- H02K2203/00—Specific aspects not provided for in the other groups of this subclass relating to the windings
- H02K2203/09—Machines characterised by wiring elements other than wires, e.g. bus rings, for connecting the winding terminations
Definitions
- the present invention relates to a centralized power distribution member of a motor.
- Patent Document 1 As an example of the concentrated power distribution member for supplying power to the windings of the stator of the three-phase motor, one described in Patent Document 1 below is known.
- This is a bus bar having a ring shape with one power supply terminal connected to a power source and a plurality of connection terminals connected to one end of a winding of each phase of U, V, W on one side edge
- three ring-shaped resin holders having the same number of receiving grooves provided concentrically, and each bus bar is inserted into the corresponding receiving groove of the ring-shaped holder.
- the bus bars are stacked and accommodated in the radial direction so as to be insulated from each other.
- the connection mode of the three-phase alternating current is a star connection, the other ends of the windings of each phase need to be connected to each other by a neutral point. It has been proposed to install three bus bars concentrically.
- the stator winding is generally arranged on the inner peripheral side of the annular holder, and there are restrictions on the attachment, so it is attached to the outermost periphery of the annular holder. It is possible. However, when the neutral point bus bar is attached to the outermost periphery of the annular holder, the annular holder is widened to the outside, and the diameter dimension of the case that accommodates the annular holder also increases, so it may not be possible due to space limitations. The countermeasure was demanded. The present invention has been completed based on the above circumstances, and its object is to realize space saving by suppressing the radial expansion of the ring-shaped holder while mounting the neutral point bus bar. .
- the present invention is a concentrated power distribution member for supplying power to a winding provided in a stator of a multiphase motor, and includes a power supply terminal and a connection terminal connected to one end of each phase winding. Connects a plurality of ring-shaped bus bars provided on the side edges, a ring-shaped holder made of synthetic resin containing the bus bars stacked in a radial direction in an insulated form, and the other ends of the windings of each phase A neutral point bus bar and a synthetic resin auxiliary holder that accommodates the neutral point bus bar, and the auxiliary holder has one end surface on which the power supply terminal and the connection terminal of the annular holder are arranged. It is characterized by being disposed on the side.
- the structure is such that an auxiliary holder in which a neutral point bus bar is accommodated by effectively utilizing a dead space, such as one end face side where the feeding terminal and the connection terminal are arranged in the annular holder, It is possible to save the space in the same direction by suppressing the radial expansion of the annular holder.
- the following configuration may also be used.
- the auxiliary holder is also used as a cover attached to the annular holder to prevent the bus bar housed in the annular holder from coming off.
- connection terminal provided in each bus bar and the connection terminal connected to the other end of the winding provided in the neutral bus bar are arranged on the same circumference. In this configuration, the structure is reduced to a narrower structure.
- the concentrated power distribution member of the present invention it is possible to save space by suppressing the radial expansion of the ring-shaped holder while attaching the neutral point bus bar.
- FIG. 1 is an exploded perspective view of a concentrated power distribution member according to an embodiment of the present invention.
- Partial enlarged view of FIG. Exploded perspective view showing the mounting operation of the auxiliary holder A perspective cross-sectional view when the mounting is completed
- Exploded perspective view showing mounting operation of auxiliary holder with nut holder A perspective cross-sectional view when the mounting is completed Perspective view when assembly of centralized power distribution member is completed
- the motor of this embodiment is a brushless motor with three-phase AC and 12 pole pairs mounted on a hybrid vehicle, and is disposed in a narrow space between an engine and a transmission, for example, and coaxially connected to a horizontal crankshaft of the engine.
- a rotor (not shown), an annular stator S (see FIG. 7) concentrically surrounding the rotor, and an annular concentrated power distribution member A surrounding the stator S concentrically.
- the stator S is composed of a plurality of magnetic poles (not shown) formed by winding the core, and the magnetic poles are arranged at a constant pitch along a circumference concentric with the rotor. The both ends of the winding are led out and the star connection method is adopted.
- the central power distribution member A is for supplying electric power to the windings of the stator S.
- the three central bus bars 10 and the bus bars 10 are concentrically insulated from each other.
- a holder 30 (corresponding to the “annular holder” of the present invention).
- the neutral point bus bar 50 (refer FIG. 9) divided
- the bus bar 10 has a structure in which twelve connection terminals 15 and one power supply terminal 20 are integrally formed with respect to a bus bar main body 11 formed in a regular 36-gonal ring shape, and have different diameters. Three are provided. More specifically, a U-phase bus bar 10U having a minimum diameter, a V-phase bus bar 10V having an intermediate diameter, and a W-phase bus bar 10W having a maximum diameter are provided. In the following description, when the three bus bars 10U, 10V, and 10W are described in common, the bus bar 10 will be described as appropriate.
- the bus bar main body 11 of the bus bar 10 is formed into a regular 36-gonal ring shape as described above by bending a metal strip at a predetermined angle for each predetermined length in the thickness direction. However, the region of less than 3 sides on the end side of the 36 sides of the regular 36-sided shape is cut off.
- connection terminal 15 is formed in a crank shape that rises from the upper edge of the bus bar body 11, is bent at a right angle toward the center of the ring shape, and rises again.
- the U-shaped crimping portion 16 is formed.
- the connection terminals 15 are formed in the above-described posture at a total of 12 locations including the edge portion 12 every two sides including the edge portion 12 s at the start end in the bus bar body 11 and the short edge portion 12 e at the end.
- Each crimping portion 16 functions to fix one end side of the corresponding winding by fusing.
- the length of the horizontal part 15a in the middle of the height of the connection terminal 15 is formed so that the bus bar 10 with a larger diameter.
- the power supply terminal 20 is formed side by side on the edge 12 where the sixth connection terminal 15 from the start end of the connection terminals 15 is formed.
- the power supply terminal 20 is formed by bending a wide band integrally formed on the upper edge of the bus bar body 11, and as shown in FIG. 11 and FIG. It is bent at right angles toward the center of the ring shape and formed into a crank shape that rises again.
- An upper end portion of the upper rising portion 20a of the power supply terminal 20 is a connection plate 21 connected to a counterpart power supply side terminal (not shown), and a bolt insertion hole 22 is opened in the connection plate 21.
- a rubber ring 23 is fitted to a position below the connection plate 21 in the rising portion 20a of the power supply terminal 20 in a form in which the downward movement is restricted.
- the power supply terminal 20 may be distinguished from the power supply terminals 20U, 20V, and 20W corresponding to the formed bus bars 10U, 10V, and 10W.
- the holder 30 is made of a synthetic resin as an insulator, has a groove shape with an opening on the top surface, and is formed in a regular 36-gonal ring shape as in the case of the bus bar 10 as shown in FIG.
- the depth of the holder 30 is about twice the width of the bus bar body 11 as shown in FIG.
- two partition walls 31 each having a regular 36-gon shape are formed to rise over the entire height with a predetermined interval in the radial direction, thereby forming a regular 36-gon shape having different diameters.
- the book receiving grooves 32 are formed concentrically.
- the innermost receiving groove 32U has the smallest U-phase bus bar 10U
- the middle receiving groove 32V has the intermediate-diameter V-phase bus bar 10V
- the innermost receiving groove 32U accommodates the W-phase bus bar 10W having the maximum diameter.
- each power supply terminal 20 takes a form arranged in a straight line.
- a common terminal block 40 is integrally formed with the holder 30.
- the terminal block 40 is formed in a form extending from the upper edge portion of the inner wall 35 toward the center of the ring shape in a region extending from the predetermined three edge portions 34 of the holder 30.
- three support walls 42 are formed so as to stand up at a small interval on the protruding edge of the receiving plate 41 that receives the horizontal portions 20b of the respective power supply terminals 20 in a form separated from each other.
- a short accessory wall 43 is formed so as to rise at an interval.
- an inner surface below the rubber ring 23 in the rising portion 20 a of the power supply terminal 20 is brought into contact with the front surface of the auxiliary wall 43.
- the neutral point bus bar 50 is divided into 12 pieces as described above and is formed in the same shape. Each neutral point bus bar 50 is bent at an obtuse angle at an intermediate position near one end side in the length direction (front end side in the clockwise direction in plan view) of the strip as shown by the broken line in FIGS. 8 and 9.
- the main body 51 has an L-shaped connection terminal 52 that protrudes outward and then rises at three locations on the outer edge of the main body 51 in the lengthwise center and both ends.
- a crimping portion 53 having a lateral U-shape is formed at the rising end of the terminal 15. The crimping portion 53 functions to fix the other end portion of the corresponding winding by fusing.
- auxiliary holders 60 and 60X Twelve neutral point bus bars 50 are embedded in the auxiliary holders 60 and 60X by insert molding, respectively. Eleven of the twelve auxiliary holders 60 have the same shape, and the remaining one auxiliary holder 60X is integrally formed with a nut holder 70 that is a power feeding unit in addition to a slight shape change. This is different from the other 11 auxiliary holders 60.
- the auxiliary holder 60 is formed by embedding the neutral point bus bar 50 in a state where only the crimping portions 53 of the three connection terminals 52 in the neutral point bus bar 50 are exposed.
- a belt-like main body 61 having a flat cross-sectional shape bent at an obtuse angle at a position close to one end side in the length direction (front end side in the clockwise direction in plan view).
- the belt-like main body 61 has a rear end side in the clockwise direction that is longer than the rear end position of the main body 51 of the embedded neutral point bus bar 50 by a predetermined dimension. It has a length dimension comparable to the length over the three edge portions 34.
- arm portions 62 are formed to protrude outward at positions spaced apart from the exposed positions of the three crimping portions 53 in the clockwise direction by a predetermined distance.
- a cover portion 63 that covers the upper surface opening of the holder 30 is formed. More specifically, the cover portion 63 is provided with three pressing pieces 64 which are respectively inserted into the receiving grooves 32 and hold down the upper edges of the bus bars 10 received in the receiving grooves 32. Yes.
- an elastically displaceable locking piece 65 having a frame shape is formed downward.
- an elastically displaceable locking piece 65 having a frame shape is formed downward.
- the outer wall 36 of the predetermined predetermined three edge portions 34 in the holder 30 locking projections 38 that are fitted into the locking pieces 65 and locked are formed. Accordingly, in the auxiliary holder 60, the three cover portions 63 are inserted into the upper surface openings of the corresponding predetermined edge portions 34 of the holder 30, that is, each pressing piece 64 is inserted into the corresponding receiving groove 32, while the locking piece As shown in FIG.
- each pressing piece 64 of the cover portion 63 presses the corresponding bus bar 10 to prevent it from coming off.
- the crimping portions 53 of the three connection terminals 52 of the neutral point bus bar 50 are alternately arranged one by one with the crimping portions 16 of the connection terminals 15 on the bus bar 10 side. More specifically, the crimping parts 16 and 53 of the connection terminals 15 and 52 are at the same height position above the upper surface of the holder 30 by a predetermined height, and the inner wall 35 of the holder 30 on the inner peripheral side of the holder 30. It is located on a concentric circle that is slightly smaller than that.
- a holding plate 67 for pressing the horizontal portion 20b of the power supply terminal 20 is provided on the lower surface side of the arm portion 62.
- the shape is the same as that of the auxiliary holder 60 including that the stop piece 65 is provided.
- the nut holder 70 is integrally formed on the inner peripheral side of the auxiliary holder 60X.
- the nut holder 70 is a horizontally long step in which a slightly narrow connecting portion 72 is arranged at the center of the upper surface of the base portion 71 having a lateral width almost the entire length of the auxiliary holder 60 ⁇ / b> X. It is formed in a block shape with a mark.
- connection portion 72 of the nut holder 70 three mounting holes 73 having a rectangular cross section penetrating inward and outward are opened at the same pitch as the connection plates 21 of the three power supply terminals 20U, 20V, and 20W.
- a mounting groove 75 having a lower surface opening into which the support wall 42 of the terminal block 40 is inserted is formed in a region on the inner surface side of the base 71.
- an insertion groove 76 with an open bottom surface is formed in the substantially central portion of the depth of the base portion 71 so that the rising portion 20a of each power supply terminal 20 can be inserted individually.
- the insertion groove 76 is inserted into the lower side thereof with the lower end of the rising portion 20a of the power supply terminal 20 together with the auxiliary wall 43, and the fitted rubber ring 23 is tightly attached to the upper side. It can be press-fitted.
- a narrow insertion groove 77 through which the connection plate 21 of the power supply terminal 20 is inserted is formed on the ceiling surface of the insertion groove 76, and opens at the bottom surface of the substantially central portion of the depth in the mounting hole 73 described above.
- a fitting groove 78 in which the left and right side edges and the upper edge of the connection plate 21 of the power supply terminal 20 are fitted is formed on the left and right side surfaces and the ceiling surface of the mounting hole 73 in a form communicating with the insertion groove 77. ing.
- the mounting hole 73 is divided into inner and outer chambers by the connecting plate 21 of the power feeding terminal 20 that has entered, and the inner chamber serves as a nut housing chamber 80, for example, in which a rectangular nut (not shown) is prevented from rotating. It is supposed to be housed in. The nut is prevented from coming off by a back cover (not shown).
- the outer chamber is a terminal insertion chamber 81 into which the connection plate of the counterpart power supply side terminal can be inserted.
- the holder 30 is installed on, for example, an assembly table in a horizontal posture. From this state, the three bus bars 10U, 10V, 10W are sequentially inserted from the inner bus bar 10 into the corresponding receiving grooves 32U, 32V, 32W after taking a predetermined rotation posture.
- twelve connection terminals 15 of each of the bus bars 10U, 10V, and 10W are arranged in an annular shape while being positioned every two.
- connection terminal 15 sets in which the three connection terminals 15 of U, V, and W are sequentially arranged are arranged in a ring shape so that 12 sets are connected.
- the crimping portions 16 of all the connection terminals 15 are concentrically smaller than the inner wall 35 at a position above the upper surface of the holder 30 by a predetermined dimension and at a position protruding inward from the inner wall 35 of the holder 30. Will be arranged along.
- the power supply terminals 20U, 20V, and 20W of the three bus bars 10U, 10V, and 10W are respectively provided at the lower ends of the rising portions 20a with respect to the terminal block 40 formed to protrude from the upper edge portion of the predetermined inner wall 35 of the holder 30.
- the horizontal portion 20 b is supported side by side in a form received by the receiving plate 41 while the portion is applied to the auxiliary wall 43.
- auxiliary holders 60 and 60X in which the neutral point bus bar 50 is embedded are mounted.
- eleven auxiliary holders 60 having a common structure are attached to eleven regions in each of which a set of U, V, and W connection terminals 15 in the holder 30 is arranged.
- the auxiliary holder 60 is pushed in while the pressing pieces 64 of the three cover parts 63 are inserted into the corresponding receiving grooves 32 in the manner described above, and the locking pieces 65 are elastically fitted to the locking protrusions 38.
- the cover 63 is mounted in a form that closes the upper surface opening of the holder 30 while pressing the bus bar 10 (FIG. 10).
- the crimping portions 53 of the three connection terminals 52 of the neutral point bus bar 50 are arranged on the same circle with every other crimping portion 16 of the three connection terminals 15 forming a set on the bus bar 10 side.
- the auxiliary holder 60X integrally formed with the nut holder 70 is mounted in the region of the holder 30 where the terminal block 40 is provided, as shown in FIG. Specifically, the corresponding insertion groove 76 formed on the lower surface of the base 71 of the nut holder 70 is inserted and pushed into the connection plate 21 of the three power supply terminals 20U, 20V, and 20W arranged from the middle.
- the support wall 42 is inserted into the mounting groove 75 on the lower surface of the nut holder 70, and the rubber ring 23 fitted to the rising portion 20 a of the power supply terminal 20 is press-fitted into the insertion groove 76.
- the upper part of the connecting plate 21 is inserted into the corresponding mounting hole 73 from the insertion groove 77 during this time.
- each power supply terminal 20 partitions inside and outside in the mounting hole 73 as shown in FIG.
- the upper edge and the side edge are fitted into the fitting groove 78 and fixed.
- each rubber ring 23 is elastically fitted to the upper end portion of the insertion groove 76 so that the seal in the insertion groove 77 is taken.
- the holding plate 67 presses the corresponding horizontal portion 20b of the power supply terminal 20, and in this state, the locking piece 65 is elastically fitted and locked to the locking projection 38, An auxiliary holder 60X is attached.
- the crimping portions 53 of the three connection terminals 52 of the neutral bus bar 50 embedded in the auxiliary holder 60X are also on the same circle as the crimping portions 16 of the three connection terminals 15 forming a set on the bus bar 10 side. It becomes the state arranged every other piece. Thus, the assembly of the concentrated power distribution member A is completed, and the form shown in FIGS. 7 and 13 is adopted.
- the concentrated power distribution member A assembled as described above is fitted on the outer peripheral side of the stator S in the brushless motor, in other words, all the connection terminals 15 (crimping portions 16) of the three bus bars 10. And all the connection terminals 52 (crimping parts 53) of the twelve neutral point bus bars 50 form a ring shape on the inner peripheral side of the inner wall 35 of the holder 30 and are arranged on the upper surface of the outer peripheral part of the stator S. It becomes. From this state, one end portion of three windings arranged in the stator S is individually connected to the crimping portion 16 of the U, V, W connection terminal 15 forming a set by fusing.
- the other end portions of the three windings are similarly individually connected to the crimping portions 53 of the connection terminals 52 of the corresponding neutral point bus bars 50 by fusing, thereby completing the star connection.
- Such a connection between the winding and the connection terminals 15 and 52 is performed over the entire circumference, and 12 star connections are formed in parallel.
- the concentrated power distribution member A and the stator S are embedded in an annular molded product with only the connection portion 72 of the nut holder 70 exposed to the outside.
- the connection plate 21 of the power supply terminal 20 has advanced through the insertion groove 77 opened in the bottom surface, and a gap is formed on the inner peripheral side of the insertion groove 77 without intention.
- leakage may occur inside and outside the molded product.
- the rubber ring 23 fitted to the rising portion 20a of the power supply terminal 20 is pressure-bonded to the peripheral surface of the insertion groove 76 at a position immediately below the insertion groove 77, the gap portion is sealed.
- the nuts are accommodated in the nut accommodating chambers 80 in the respective mounting holes 73 of the nut holder 70 with the nuts being prevented from rotating, and are prevented from coming off by the back cover. Then, the connection plate (with bolt insertion hole) of the other power supply side terminal is inserted into the terminal insertion chamber 81 and overlapped with the connection plate 21 of the power supply terminal 20, and the bolt (not shown) is the bolt of the connection plate of the power supply side terminal.
- the bolt is inserted into the bolt insertion hole 22 of the connection plate 21 of the power supply terminal 20, and is screwed into the screw hole of the nut that is mounted on the back side, and is screwed into the nut with a tool,
- the connection plate 21 of the power supply terminal 20 and the connection plate of the counterpart power supply side terminal are fastened to establish an electrical connection.
- the neutral point bus bar 50 is accommodated in the auxiliary holders 60 and 60X as the arrangement structure of the neutral point bus bars 50, and then the auxiliary holders 60 and 60X. Since the dead space such as the upper surface side of the holder 30 and the stator S fitted inside the holder 30 is effectively used, the expansion of the holder 30 in the radial direction can be suppressed, and the space in the same direction can be saved. Can be planned.
- the auxiliary holder 60 is integrally provided with the cover portion 63 for preventing the bus bar 10 accommodated in the holder 30 from coming off, the number of parts and the assembling process are compared with the case where a cover is provided separately from the auxiliary holder 60. This can contribute to a reduction in manufacturing cost. Since the connection terminal 15 of the bus bar 10 to which one end of the winding is connected and the connection terminal 52 of the neutral point bus bar 50 connected to the other end of the winding are arranged on the same circumference, the width is further increased. It can be put together in a neat and clean structure.
- the present invention is not limited to the embodiments described with reference to the above description and drawings.
- the following embodiments are also included in the technical scope of the present invention.
- the number of divisions of the neutral point bus bar and the auxiliary holder is not limited to the 12 divisions exemplified in the above embodiment, and may be any number of divisions.
- the neutral point bus bar and the auxiliary holder may be formed in an integral ring shape.
- the auxiliary holder can be accommodated in the region of the upper end surface of the holder, and such an item is included in the technical scope of the present invention.
- connection terminal provided on the bus bar and the connection terminal provided on the neutral point bus bar are not necessarily arranged on the same circumference, and such a thing is also within the technical scope of the present invention. include.
- the multiphase alternating current is not limited to three phases, and may be two phases or four or more phases.
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- Insulation, Fastening Of Motor, Generator Windings (AREA)
Abstract
Description
一方、3相交流の結線態様がスター結線であると、各相の巻線の他端同士を中性点により接続する必要があり、従来、中性点バスバーを別途備えて、上記の環形ホルダ内に3個のバスバーと同心に組み付けることが提案されている。
本発明は上記のような事情に基づいて完成されたものであって、その目的は、中性点バスバーを装着しながらも環形ホルダの径方向の拡大を抑えて省スペースを実現するところにある。
前記補助ホルダが、前記環形ホルダ内に収容された前記バスバーの外れ止めをするべく前記環形ホルダに装着されたカバーと兼用している。
この構成では、部品点数と組付工程の削減ができ、製造コストの低減に寄与することができる。
この構成では、より幅狭となったすっきりとした構造にまとめられる。
本発明の一実施形態を図1ないし図13に基づいて説明する。
本実施形態のモータは、ハイブリッド車に搭載される3相交流12極対のブラシレスモータであり、例えばエンジンとトランスミッションとの間の狭い空間に配置され、エンジンの水平なクランクシャフトに同軸に連結されたロータ(図示せず)と、ロータを同心状に包囲する環形のステータS(図7参照)と、ステータSを同心状に包囲する環形の集中配電部材Aとを備えて構成される。ステータSは、コアに巻線を施すことによって構成された複数の磁極(図示せず)によって構成され、磁極は、ロータと同心の円周に沿って一定ピッチで配置されており、各磁極からは巻線の両端部が導出され、スター結線方式が採られている。
また、12個に分割されて全体として環状に配される中性点バスバー50(図9参照)を備えており、各中性点バスバー50は、インサート成形によって補助ホルダ60,60X内に埋設されている。
なお以下において、3個のバスバー10U,10V,10Wについて共通の説明をする場合には、適宜にバスバー10として説明する。
なお、径の大きいバスバー10ほど、接続端子15の高さ途中の水平部15aの長さが大きく形成されている。
なお、給電端子20について、形成された対象のバスバー10U,10V,10Wと対応し、給電端子20U,20V,20Wとして区別する場合がある。
ホルダ30の3本の収容溝32のうち、最内側の収容溝32Uには最小径のU相のバスバー10Uが、中央の収容溝32Vには中間径のV相のバスバー10Vが、また、最外側の収容溝32Wには最大径のW相のバスバー10Wが、それぞれ収容されるようになっている。
したがって補助ホルダ60は、3個のカバー部63がホルダ30の対応する所定の縁辺部34の上面開口に挿入され、すなわち各押圧片64が対応する収容溝32に挿入される一方、係止片65が対応する縁辺部34の外壁36に沿って係止突部38に乗り上げつつ押し込まれ、カバー部63の上面部63aがホルダ30の上面開口を塞いだところで、図10に示すように、係止片65が係止突部38に嵌って係止されることで、補助ホルダ60が抜け止めされて装着されるようになっている。
ただし、この補助ホルダ60Xの内周縁側には、ナットホルダ70が一体に形成されている。このナットホルダ70は、図8及び図11に示すように、補助ホルダ60Xのほぼ全長に亘る横幅を持った基部71の上面中央部に、少し幅狭の接続部72が配された横長の段付きのブロック状に形成されている。
基部71の内面側の領域には、図12に示すように、上記した端子台40の支持壁42が挿入される下面開口の取付溝75が形成されている。また、基部71の奥行の略中央部には、各給電端子20の立ち上がり部20aが個別に挿入可能な下面開放の挿入溝76が形成されている。
一方、外側の部屋は、相手の電源側端子の接続板が挿入可能とされる端子挿入室81とされている。
ホルダ30が、図2に示すように、水平姿勢で例えば組立台上に設置される。この状態から、3個のバスバー10U,10V,10Wが、所定の回動姿勢を採った上で、内側のバスバー10から順次に対応する収容溝32U,32V,32Wに挿入される。
3個のバスバー10の装着が完了すると、図4及び図5に示すように、各バスバー10U,10V,10Wの12個ずつの接続端子15がそれぞれ2個置きごとに位置しつつ環形に配され、言い換えると、U,V,Wの3個の接続端子15が順次に配された円弧形をなす接続端子15の組が、12組繋がれるようにして環形に配された形態となる。ここで全接続端子15の圧着部16は、ホルダ30の上面よりも所定寸法上方位置で、かつホルダ30の内壁35よりも内方に突出した位置において、同内壁35よりも一回り小さい同心円上に沿うように配されることになる。
中性点バスバー50の3個の接続端子52の圧着部53は、バスバー10側の一組をなす3個の接続端子15の圧着部16と、同一円上で1個置きに配される。
詳細には、3枚並んだ給電端子20U,20V,20Wの接続板21に対して、ナットホルダ70の基部71の下面に形成された対応する挿入溝76が挿入されて押し込まれ、途中から、支持壁42がナットホルダ70の下面の取付溝75に挿入されるとともに、給電端子20の立ち上がり部20aに嵌着されたゴムリング23が挿入溝76に圧入されることに続いて、ゴムリング23から下の部分が添え壁43ともども挿入され、この間に接続板21の上端が挿通溝77から対応する装着孔73内に進入する。
一方、補助ホルダ60X側では、押え板67が対応する給電端子20の水平部20bを押さえ、係る状態で係止片65が係止突部38に弾性的に嵌って係止されることで、補助ホルダ60Xが装着される。
この補助ホルダ60Xに埋設された中性点バスバー50の3個の接続端子52の圧着部53も、バスバー10側の一組をなす3個の接続端子15の圧着部16と、同一円上で1個置きに配された状態となる。
以上により、集中配電部材Aの組み付けが完了し、図7及び図13に示す形態を採る。
この状態から、ステータSに設けられた巻線のうち3個並んだ巻線の一端部が、組をなすU,V,Wの接続端子15の圧着部16に個別にフュージングにより接続され、同3個の巻線の他端部が、対応する中性点バスバー50の接続端子52の圧着部53に同じく個別にフュージングにより接続され、これによりスター結線が完了する。
このような巻線と接続端子15,52との接続が全周に亘って実施され、スター結線が12個並列に形成されることになる。
このとき、ナットホルダ70の各装着孔73では、その底面に開口された挿通溝77を通して給電端子20の接続板21が進出しており、挿通溝77の内周側に図らずも隙間ができて、モールド成形品の内外に洩れが生ずる可能性がある。
しかしながら挿通溝77の直下位置において、給電端子20の立ち上がり部20aに嵌着されたゴムリング23が、挿入溝76の周面に圧着されているから、同隙間部分がシールされることになる。
巻線の一端が接続されるバスバー10の接続端子15と、巻線の他端と接続される中性点バスバー50の接続端子52とが、同一円周上に配されているから、より幅狭となったすっきりとした構造にまとめることができる。
本発明は上記記述及び図面によって説明した実施形態に限定されるものではなく、例えば次のような実施形態も本発明の技術的範囲に含まれる。
(1)中性点バスバー並びに補助ホルダの分割数は、上記実施形態に例示した12分割に限らず、任意の分割数としてもよい。さらに、中性点バスバー並びに補助ホルダが一体の環形に形成されたものであってもよい。
(2)補助ホルダの形状等によっては、補助ホルダをホルダの上端面の領域内に収めて装着することも可能であり、そのようなものも本発明の技術的範囲に含まれる。
(4)バスバーに設けられた接続端子と、中性点バスバーに設けられた接続端子とは、必ずしも同一円周上に配されていなくても良く、そのようなものも本発明の技術的範囲に含まれる。
(5)上記実施形態では3相交流12極対の場合を例示したが、極数対は任意である。また多相交流は3相に限らず、2相または4相以上であってもよい。
S…ステータ
10,10U,10V,10W…バスバー
15…接続端子
16…圧着部
20,20U,20V,20W…給電端子
30…ホルダ(環形ホルダ)
32,32U,32V,32W…収容溝
50…中性点バスバー
52…接続端子
53…圧着部
60,60X…補助ホルダ
63…カバー部(カバー)
Claims (3)
- 多相モータのステータに具備された巻線に電力を供給するための集中配電部材であって、
給電端子と、各相の巻線の一端と接続される接続端子とを一方の側縁に備えた環形をなす複数のバスバーと、
前記バスバーを互いに絶縁された形態で径方向に積層して収容した合成樹脂製の環形ホルダと、
前記各相の巻線の他端同士を接続する中性点バスバーと、
前記中性点バスバーを収容する合成樹脂製の補助ホルダと、を有し、
前記補助ホルダが、前記環形ホルダにおける前記給電端子と前記接続端子とが配された一端面側に配設されているモータの集中配電部材。 - 前記補助ホルダが、前記環形ホルダ内に収容された前記バスバーの外れ止めをするべく前記環形ホルダに装着されたカバーと兼用している請求項1記載のモータの集中配電部材。
- 前記各バスバーに設けられた前記接続端子と、前記中性点バスバーに設けられた前記巻線の他端と接続される接続端子とが、同一円周上に配されている請求項1または請求項2記載のモータの集中配電部材。
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US14/767,437 US9819240B2 (en) | 2013-02-22 | 2014-01-31 | Centralized power distribution member for motor with detachable auxiliary holder |
DE112014000963.6T DE112014000963T5 (de) | 2013-02-22 | 2014-01-31 | Zentralisiertes Leistungsverteilungselement für einen Motor |
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JP2013033246A JP6073703B2 (ja) | 2013-02-22 | 2013-02-22 | モータの集中配電部材 |
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JP (1) | JP6073703B2 (ja) |
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JP7479233B2 (ja) | 2020-07-20 | 2024-05-08 | 三菱電機株式会社 | 回転電機ステータの結線板、回転電機のステータ、および回転電機 |
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US20150381002A1 (en) | 2015-12-31 |
JP6073703B2 (ja) | 2017-02-01 |
JP2014165981A (ja) | 2014-09-08 |
DE112014000963T5 (de) | 2015-10-29 |
US9819240B2 (en) | 2017-11-14 |
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