WO2011102210A1 - 回転電機用電機子 - Google Patents
回転電機用電機子 Download PDFInfo
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- WO2011102210A1 WO2011102210A1 PCT/JP2011/051903 JP2011051903W WO2011102210A1 WO 2011102210 A1 WO2011102210 A1 WO 2011102210A1 JP 2011051903 W JP2011051903 W JP 2011051903W WO 2011102210 A1 WO2011102210 A1 WO 2011102210A1
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- WIPO (PCT)
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- conductor
- segment
- joined
- armature
- circumferential direction
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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
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- the present invention includes an armature core in which a plurality of slots extending in the axial direction of a cylindrical core reference surface are distributed in the circumferential direction of the core reference surface, and a coil wound around the armature core.
- the present invention relates to an armature for a rotating electric machine.
- the conductor side portions of the plurality of segment conductors are regularly arranged in the slots of the armature core, and are different from each other so as to protrude in the axial direction with respect to the armature core.
- a technique for forming a coil by joining protruding portions of segment conductors is already known (for example, see Patent Document 1).
- the bonding surfaces formed at the respective leading ends of the two protrusions to be bonded to each other face each other in the radial direction. Are joined.
- the joint portion formed by joining the joint surfaces increases in the radial direction, so that the distance between the joint portions adjacent to each other in the radial direction tends to be shortened. It is not easy to ensure electrical insulation between many joints arranged on the outside in the direction.
- Patent Document 2 discloses that the length ratio of the pair of protrusions joined at the joint is different from 1, and the diameter The structure which makes the said ratio different between the junction parts adjacent to a direction is described. It is described that by having such a configuration, adjacent joints do not overlap with each other in the radial direction, and a distance between adjacent joints is ensured.
- An armature core in which a plurality of slots extending in the axial direction of a cylindrical core reference surface according to the present invention are distributed in the circumferential direction of the core reference surface, and a coil wound around the armature core.
- the characteristic structure of the armature for a rotating electric machine is that the coil includes a conductor side portion disposed in the slot, and extends from the conductor side portion and protrudes axially from the armature core.
- a plurality of segment conductors including a pair of projecting portions extending obliquely in the circumferential direction with respect to the extending direction of the conductor side portions so as to be gradually separated in the axial direction, and the pair of projecting portions are The extending directions with respect to the circumferential direction are opposite to each other, and each of the projecting portions is joined to the projecting portion of the segment conductor to be joined, which is another segment conductor to be joined, and joined to each other.
- One At least one of the protrusions includes an offset bent portion that offsets the tip on the side closer to the other protrusion in the radial direction of the core reference surface, and is formed at the tip of each of the two protrusions. The bonding surfaces are bonded to each other in the circumferential direction.
- the “rotary electric machine” is used as a concept including any of a motor (electric motor), a generator (generator), and a motor / generator functioning as both a motor and a generator as necessary.
- the bonding surfaces are bonded to each other in the radial direction.
- the size of the bonded portion formed by bonding the bonded surfaces can be made smaller in the radial direction. Therefore, even when the number of conductor side portions arranged in each slot increases and a plurality of joint portions are arranged side by side in the radial direction, an appropriate distance between the plurality of joint portions is ensured. Thus, it is easy to ensure the electrical insulation between the joints, and thus the electrical insulation of the entire coil.
- ensuring the electrical insulation as described above can be realized without changing the ratio of the lengths of the two protrusions joined to each other at the joints between the joints adjacent in the radial direction. is there. That is, in the present invention, it is not always necessary that the ratio of the lengths of the two protrusions joined to each other at the joint is different between the joints adjacent in the radial direction. It is also possible to make the ratio of the lengths of the two protruding portions common to each other. As described above, according to the above-described characteristic configuration, it is easy to share the shape of a plurality of segment conductors and suppress an increase in manufacturing cost, while electrically insulating between joint portions adjacent in the radial direction. Can be easily secured.
- the other segment conductor in which the conductor side portion is disposed at the same radial position in the adjacent slot is an adjacent same-layer segment conductor, and the offset bent portion is , Provided in the circumferential direction between the tip of the projection to be joined provided in the segment conductor to be joined and the tip of the projection provided in the adjacent same-layer segment conductor with respect to the segment conductor to be joined. It is preferable that
- the offset bent portion that offsets the tip portion is avoided while avoiding the tip portion of the protruding portion of the other segment conductor (including the adjacent same-layer segment conductor with respect to the joining target segment conductor) other than the joining target segment conductor.
- the projecting portions of the segment conductors are arranged adjacent to each other so as to be parallel to the projecting portions of the adjacent same-layer segment conductors and at the same radial position.
- aligned at the same radial position refers to a state in which the positions in the radial direction of the core reference surface are the same and the circumferential positions are sequentially shifted.
- each projecting portion of the segment conductor is disposed adjacently so as to be parallel to the projecting portion of the adjacent same-layer segment conductor and aligned at the same radial position, so that a plurality of projecting portions can be processed without performing processing or the like.
- the projecting portions of the segment conductors can be arranged with high density. Therefore, it is possible to suppress the portion of the coil (coil end portion) protruding in the axial direction from the armature core from increasing in the radial direction and the axial direction, and it becomes easy to reduce the size of the armature for a rotating electrical machine.
- segment conductors to be joined for each of the segment conductors are arranged at radial positions adjacent to the conductor side portions of the segment conductors in the slots different from the slots in which the segment conductors are arranged. It is preferable that the other segment conductor is provided with a portion.
- the configuration of the offset bent portion can be simplified. Therefore, an increase in manufacturing cost and an increase in the size of the coil due to the provision of the offset bent portion can be suppressed.
- the joints between the joint surfaces of the two projecting parts have a plurality of radial arrangement parts arranged in a row in the radial direction, and a plurality of the plurality of the radial arrangement parts constituting each of the radial arrangement parts It is preferable that the joint portions are arranged at equal radial intervals.
- the slot has an opening on one side in the radial direction of the core reference surface, and the circumferential width of the opening is set to a width that allows the conductor side portion to be inserted in the radial direction. It is preferable that
- the segment conductor can be inserted into the slot along the radial direction from the opening side with respect to the armature core, the pair of projecting portions whose extending directions in the circumferential direction are opposite to each other
- the segment conductor in a state where is formed on both sides in the axial direction can be appropriately inserted into the slot. Therefore, it is possible to join a plurality of segment conductors without performing a process such as bending on the segment conductors after insertion into the slot, thereby simplifying the manufacturing process and reducing the alignment cost.
- the tip of the protruding portion extends in parallel with the extending direction of the tip of the protrusion to be joined at the same radial position as the tip of the protrusion to be joined which is the protrusion to be joined. Preferably it is formed.
- the tip portions of the two projecting portions to be joined to each other can be arranged in parallel to each other and can be arranged in the circumferential direction at the same radial position. It can be done easily and reliably.
- the main body portion extending in the circumferential direction of the projecting portion has a linear shape extending in a direction inclined with respect to the extending direction of the conductor side portion when viewed in the radial direction of the core reference surface. It is preferable that the reference plane is formed in an arc shape parallel to the core reference plane as viewed in the axial direction.
- the main body portion of the projecting portion is arranged in a cylindrical shape that matches the shape of the armature core, the projecting portions of the plurality of segment conductors can be connected to the armature core without processing the projecting portion. It can be arranged with high density in a shape that matches the shape. Accordingly, it is possible to prevent the coil end portion protruding in the axial direction from the armature core from increasing in the radial direction and the axial direction, and it is easy to reduce the size of the armature for a rotating electrical machine.
- Embodiments of an armature for a rotating electrical machine according to the present invention will be described with reference to the drawings.
- the case where the armature for a rotating electrical machine according to the present invention is applied to the stator 1 (see FIG. 4) of an inner rotor type rotating electrical machine will be described as an example.
- the coil 4 included in the stator 1 is configured by using a plurality of segment conductors 5 (see FIG. 2) in which the extending directions with respect to the circumferential direction C of the pair of protrusions 7 are opposite to each other.
- FIG. 2 in which the extending directions with respect to the circumferential direction C of the pair of protrusions 7 are opposite to each other.
- the joint surfaces 60 formed on the segment conductors 5 are in the circumferential direction C. It is characterized by the fact that it is joined oppositely. Thereby, it is easy to ensure electrical insulation between the joint portions 61 adjacent to each other in the radial direction R while suppressing an increase in manufacturing cost.
- the configuration of the stator 1 according to the present embodiment will be described in the order of “the overall configuration of the stator”, “the configuration of the segment conductor”, and “the configuration of the coil”.
- the stator 1 and the stator core 2 correspond to the “armature for rotating electrical machine” and the “armature core” in the present invention, respectively.
- the “axial direction L”, “circumferential direction C”, and “radial direction R” are axes of a cylindrical core reference surface S (see FIGS. 4 and 5) described later. It is defined as a standard.
- “Axis first direction L1” represents a direction toward the upper side along the axial direction L in FIG. 4
- “Axis second direction L2” represents a direction toward the lower side along the axial direction L in FIG. .
- the “circumferential first direction C1” is when the stator 1 is viewed from the first axial direction L1 side (when viewed from the first axial direction L1 side to the second axial direction L2 side).
- the “second circumferential direction C2” represents a counterclockwise direction when the stator 1 is viewed from the first axial direction L1 side.
- the “inner diameter direction R1” represents a direction toward the inner side of the radial direction R of the core reference surface S
- the “outer diameter direction R2” represents a direction toward the outer side of the radial direction R of the core reference surface S.
- the directions of the coil 4 and the segment conductor 5 constituting the coil 4 are defined as directions in a state in which these are mounted on the stator core 2.
- the direction of each member and the relationship between the arrangement directions of the two members are used as a concept including a deviation corresponding to a manufacturing error. ing. Such manufacturing errors are caused, for example, by deviations within the tolerances of dimensions and mounting positions.
- FIG. 1 shows a wave winding coil portion 8 constituting a coil 4 provided in the stator 1.
- FIG. 1 in order to facilitate understanding of the invention, hatching is applied to a first layer segment conductor 5a described later, and brighter hatching is applied to a second layer segment conductor 5b than the first layer segment conductor 5a.
- the wave winding coil portion 8 is configured by using a plurality of segment conductors 5 as shown in FIG. 2, and the entire wave winding coil portion 8 makes the stator core 2 (see FIG. 4) five times (five rounds). Wave winding coils for 5 turns are formed.
- the wave winding coil set 9 is formed by the two wave winding coil portions 8 in which the conductor side portions 31 are inserted into the same slot 3.
- the coil 4 is formed as shown in FIG. 4 by the six wave winding coil sets 9 arrange
- the coil 4 is wave-wound and wound around the stator core 2 provided in the stator 1.
- the stator core 2 is formed using a magnetic material, and as shown in FIG. 4, the stator core 2 is formed in a cylindrical shape as a whole except for a mounting projection 33 for mounting to a case or the like.
- a mounting hole 33 a penetrating in the axial direction L is formed in the mounting protrusion 33.
- a plurality of slots 3 extending in the axial direction L (48 in this example) are dispersedly arranged in the circumferential direction C to form the stator core 2.
- the plurality of slots 3 are arranged at a constant circumferential interval C (slot pitch), and are provided so as to extend at least in the axial direction L.
- the slot 3 is formed in a groove shape extending in the axial direction L and the radial direction R and having a constant width in the circumferential direction C.
- Each slot 3 includes an opening 3 a on one side in the radial direction R (in the radial inner direction R 1 side in this example), and also includes openings on both sides in the axial direction L of the stator core 2. That is, each slot 3 is formed so as to open on the inner peripheral surface of the core and on both sides in the axial direction L (both axial end surfaces) of the stator core 2.
- the plurality of slots 3 are formed in the stator core 2 so as to extend radially from the axis of the stator core 2 in the radial direction R.
- the plurality of slots 3 have the same shape.
- the stator 1 is a stator used in a rotating electrical machine driven by a three-phase alternating current
- the stator core 2 has a slot 3 or a slot 3 corresponding to each of the three-phase phases.
- a set (for example, a set of two slots 3) is arranged so as to repeatedly appear in the circumferential direction C.
- the coil 4 is comprised by the phase coil corresponding to each phase.
- the cylindrical core reference surface S that serves as a reference in each of the axial direction L, the circumferential direction C, and the radial direction R is a virtual surface that serves as a reference for the arrangement and configuration of the slots 3.
- the core is a virtual cylindrical surface including the end surface on the radial inner side R ⁇ b> 1 side of the teeth 32 positioned between the slots 3 adjacent to each other in the circumferential direction C.
- the inner peripheral surface can be defined, and this cylindrical core inner peripheral surface can be used as the “cylindrical core reference surface S” in the present invention.
- Cylindrical surfaces in relation can also be the “cylindrical core reference surface S” in the present invention.
- the outer peripheral surface of the stator core 2 excluding the mounting projection 33 can be a “cylindrical core reference surface S”.
- N conductor sides 31 are arranged in a row so as to be overlapped in the radial direction R so as to be aligned at the same circumferential direction C. Is done.
- N is “10”
- the coil 4 has a 10-layer winding structure.
- each radial R position of the plurality of conductor side portions 31 arranged in the radial direction R in the slot 3 is represented by a layer.
- the position closest to the radially outward direction R2 is defined as the first layer, and the second layer and the third layer are sequentially directed from the position toward the radially inward direction R1. ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ 10th layer.
- the conductor side portion 31 has the first layer to the N-th layer (tenth layer in this example) set in the slot 3 so as to be adjacent to each other in the radial direction R2 side toward the radial direction R1 side. Arranged in any layer up to.
- stator 1 as a field magnet provided with a permanent magnet or an electromagnet is disposed on the inner radial direction R1 side of the stator 1 (stator core 2) so as to be rotatable relative to the stator 1. Then, the rotor is rotated by the rotating magnetic field generated from the stator 1.
- stator 1 according to the present embodiment is an inner rotor type and a stator that is an armature for a rotating field type rotating electrical machine.
- the stator 1 is disposed to face the rotor as a field in the radial direction R and constitutes a rotating electrical machine together with the rotor.
- segment conductor 5 constituting the coil 4
- the other segment conductors 5 to be joined are referred to as “joining target segment conductors” and the joining target protrusions 7 included in the joining target segment conductors are “ It is referred to as “joining target protrusion”.
- another segment conductor 5 in which the conductor side portion 31 is disposed at the same radial direction R position (same layer) in the adjacent slot 3 is referred to as an “adjacent same-layer segment conductor”. .
- the coil 4 according to the present embodiment is an odd segment conductor having a shape different from that of the segment conductor 5 described below as a segment conductor constituting an end portion connected to a power source or a neutral point or a connection portion between turns. However, the description of the deformed segment conductor is omitted here.
- the segment conductor 5 is a conductor corresponding to the coil 4 (phase coil of each phase) divided into a plurality of parts, and the end portions (tip portions 71 described later) of the plurality of segment conductors 5 are joined together to form the stator core 2. Is formed.
- the segment conductor 5 has a rectangular cross section perpendicular to the extending direction (equal to the energizing direction), more specifically, a rectangular shape with corners arcuate. It is composed of a linear conductor having a shape.
- the segment conductor 5 is basically the same regardless of the position in the extending direction except for the bent portions (the first circumferential direction bent portion 11, the second circumferential direction bent portion 12, and the offset bent portion 13) described later. It has a cross-sectional shape.
- the material constituting this linear conductor can be, for example, copper or aluminum.
- the surface of the linear conductor is covered with an insulating film made of resin or the like (for example, polyimide or the like) except for a part of the joint surface 60 or the like that is a part for electrical connection with the segment conductor to be joined. Yes.
- the segment conductor 5 includes a conductor side portion 31 disposed in the slot 3 and a pair of projecting portions 7 extending from the conductor side portion 31 and projecting from the stator core 2 to both sides in the axial direction L.
- the conductor side portion 31 is a portion of the segment conductor 5 that is inserted into the slot 3 of the stator core 2, and has a shape that matches the shape of the slot 3.
- the conductor side portion 31 is formed in a straight line extending in parallel with the axial direction L.
- the conductor side part 31 is arrange
- the number of the layer is M (in this example, M is an integer of 1 to 10), It is called “Mth layer segment conductor”. That is, in this example, as shown in FIG. 1, as the segment conductor 5, the first layer segment conductor 5a, the second layer segment conductor 5b, the third layer segment conductor 5c, the fourth layer segment conductor 5d, the fifth layer segment It has a conductor 5e, a sixth layer segment conductor 5f, a seventh layer segment conductor 5g, an eighth layer segment conductor 5h, a ninth layer segment conductor 5i, and a tenth layer segment conductor 5j.
- Each of the pair of protrusions 7 is formed so as to be inclined in the circumferential direction C with respect to the axial direction L, which is the extending direction of the conductor side portion 31, so as to be gradually separated from the stator core 2 in the axial direction L. ing.
- the extension direction regarding the circumferential direction C is made into the mutually opposite direction. Specifically, when the extending direction with respect to the circumferential direction C is a direction away from the conductor side portion 31, as shown in FIG. 1, the odd-numbered layer segment conductor in which the conductor side portion 31 is arranged in an odd-numbered layer.
- the protruding portion 7 on the axial first direction L1 side has the extending direction in the circumferential direction C as the circumferential second direction C2, and the protruding on the axial second direction L2 side.
- the extending direction in the circumferential direction C of the part 7 is the circumferential first direction C1.
- the protruding portion 7 on the axial first direction L1 side extends in the circumferential direction C. Is the first circumferential direction C1, and the projecting portion 7 on the second axial direction L2 side has a circumferential second direction C2 extending in the circumferential direction C.
- the protruding portion 7 includes a first circumferentially bent portion 11, a second circumferentially bent portion 12, a first circumferentially bent portion 11, and a first A main body 73 that constitutes a portion between the circumferentially bent portion 12 and extends in the circumferential direction C, and an offset bent portion 13 are provided.
- the first circumferential direction bent portion 11 is a bent portion for setting the extending direction of the main body portion 73 to a direction inclined in the circumferential direction C with respect to the extending direction of the conductor side portion 31.
- the inclination angle in the extending direction of the main body 73 is determined according to the bending angle of the first circumferential bending portion 11.
- the pair of protrusions 7 included in the segment conductor 5 has the first circumferential direction bent portion 11 on the first axial direction L1 side, because the extending directions with respect to the circumferential direction C are opposite to each other.
- the bending direction of the first circumferential direction bent portion 11 on the second axial direction L2 side is opposite to each other.
- the main body 73 has a linear shape extending in a direction inclined with respect to the extending direction of the conductor side portion 31 when viewed in the radial direction R, and has a shaft. It is formed in an arc shape parallel to the core reference plane S when viewed in the direction L.
- the main body 73 is formed so as to be gradually separated from the stator core 2 in the axial direction L. In other words, the main body 73 is formed so as to be directed to one side in the circumferential direction C as it is separated from the stator core 2 in the axial direction L.
- the second circumferential direction bent portion 12 is a bent portion for making the extending direction of the distal end portion 71 of the projecting portion 7 be a direction inclined with respect to the extending direction of the main body portion 73 in the radial direction R view.
- the second circumferentially bent portion 12 is formed so that the extending direction of the tip end portion 71 is a direction parallel to the axial direction L.
- the protrusion part 7 is joined to the protrusion part 7 of the joining object segment conductor by joining the front-end
- the tip portion 71 is a portion including the edge of the protruding portion 7 on the side opposite to the conductor side portion 31 of the extension source.
- the portion from the offset bent portion 13 to the above edge is the tip.
- Part 71 is configured. That is, in this example, the front end portion 71 is a portion including the above-described edge, and is a portion in which the extending direction is formed uniformly. And the surface which faces the front-end
- the surface of the distal end portion 71 facing the opposite side to the conductor side portion 31 of the segment conductor 5 provided with the distal end portion 71 in the circumferential direction C is the joining surface 60.
- the distal end portion 71 is a portion where the joint surface 60 is formed in the protruding portion 7.
- the offset bent portion 13 is a bent portion that offsets the distal end portion 71 of the protruding portion 7 in the radial direction R toward the side closer to the protruding portion 7 to be joined (more precisely, the distal end portion 71 to be joined).
- the offset bending portion 13 is a portion (main body) on the conductor side 31 side of the protruding portion 7 so that the distal end portion 71 is positioned in the same radial direction R as the protruding portion 7 (tip end portion 71) to be joined.
- the offset bent portion 13 is formed in a crank shape (here, a crank shape having an obtuse bend angle) as viewed in the circumferential direction C.
- offset bent portions 13 are formed on both of the pair of projecting portions 7 included in the segment conductor 5, and the offset amount d in the radial direction R of each offset bent portion 13 is linear in the conductor side portion 31. It is half the thickness (half layer) of the conductor in the radial direction R (see FIG. 6B). Therefore, in this embodiment, the coil 4 formed by the segment conductor 5 has the joint portions 61 on both sides in the axial direction L, and is similarly formed on the first axial direction L1 side and the second axial direction L2 side. ing. Moreover, in this example, the offset bending part 13 is provided in the position adjacent to the front-end
- the length in the circumferential direction C of the protruding portion 7 is basically the distance in the circumferential direction C between the conductor side portion 31 from which the protruding portion 7 extends and the conductor side portion 31 of the segment conductor to be joined.
- the extending length in the circumferential direction C of each member is the length in the circumferential direction C when projected onto a plane orthogonal to the axial direction L.
- the separation distance is set to 6 slot pitches, and the length of the protruding portion 7 in the circumferential direction C is set to approximately half of that (about 3 slot pitches).
- the coil 4 includes a plurality of wave winding coil portions 8 as shown in FIG.
- the wave-wound coil portion 8 is configured so that the protruding portions 7 of the pair of segment conductors 5 in which the conductor side portions 31 are arranged in mutually adjacent layers in different slots 3 are arranged on the circumferential first direction C1 side.
- the wave-wound coil section 8 includes the odd-numbered layer segment conductors of adjacent layers in which the conductor side portions 31 are disposed in the slots 3 separated from each other by one magnetic pole pitch (6 slot pitch in this example). And even-numbered layer segment conductors are sequentially joined toward the circumferential first direction C1.
- the configuration of the wave winding coil unit 8 will be described in more detail.
- four odd layer segment conductors for example, the first layer segment conductor 5a
- four even layer segment conductors for example, the second layer segment.
- the conductors 5b) are alternately joined on both sides in the axial direction L so as to make a round in the circumferential direction C of the stator core 2, thereby forming a coil for one turn that makes a round (one round) of the stator core 2.
- a coil for five turns is formed by the 20 odd layer segment conductors and the 20 even layer segment conductors.
- the segment conductors to be joined for each of the segment conductors 5 are adjacent to the conductor side 31 of the segment conductor 5 in the slot 3 different from the slot 3 in which the segment conductor 5 is disposed. It is set as the other segment conductor 5 by which the conductor side part 31 is arrange
- the offset bent portion 13 that offsets the distal end portion 71 to the side closer to the projecting portion 7 to be joined in the radial direction R in each of the pair of projecting portions 7. Is formed. Thereby, in this example, both the two protrusion parts 7 joined mutually are provided with the offset bending part 13.
- the offset amount d of each offset bent portion 13 is set to half the half of the thickness of the linear conductor in the radial direction R (half layer). Thereby, the joining surfaces 60 (see FIG.
- the bonding surfaces 61 of the two protrusions 7 to be bonded to each other are bonded in a state of facing each other in the circumferential direction C, whereby the bonding portion 61 formed by bonding the two bonding surfaces 60 to each other. Is formed.
- the size of the joint portion 61 constituted by the two tip portions 71 can be made smaller in the radial direction R than the circumferential direction C, and the joint portion 61 adjacent in the radial direction can be formed. It is easy to ensure the distance between each other and ensure the electrical insulation between the joints 61.
- the second circumferential bent portion 12 is formed so that the extending direction of the distal end portion 71 is parallel to the axial direction L.
- the segment conductors 5 in which the conductor side portions 31 are arranged in layers adjacent to each other are joined together, and the offset bending provided in both of the two protruding portions 7 joined to each other.
- the offset amount d of the part 13 is set to a half layer.
- tip part 71 of the protrusion part 7 is the same radial direction R position as the front-end
- the length of the protruding portion 7 in the circumferential direction C is basically set to about 3 slot pitches for all the segment conductors 5. That is, in this embodiment, the ratio of the lengths of the two protrusions 7 joined to each other at the joint 61 is “1”. Accordingly, as shown in FIGS. 1 and 4, the joint 61 is disposed at the same position in the axial direction L on each of the first axial direction L1 side and the second axial direction L2 side with respect to the stator core 2. A plurality (four in this example) of radial array portions 62 are formed in which a plurality of joint portions 61 are arranged side by side in the radial direction R at the same circumferential direction C position.
- sequence part 62 is arrange
- the positional relationship in the radial direction R of the joint portion 61 with respect to the conductor side portion 31 from which the two protrusions 7 constituting each of the joint portions 61 are extended is set to one radial arrangement portion 62. This is realized by making all of the plurality of joint portions 61 constituting the same one another.
- the position in the radial direction R of the joint portion 61 is a range in the radial direction R occupied by the conductor side portion 31 from which the two protruding portions 7 constituting the joint portion 61 extend (
- the arrangement configuration as described above is realized by setting the bending direction and the offset amount d of each offset bending portion 13 so as to be positioned at the center in the case of two layers in this example. Thereby, it is possible to appropriately ensure the distance between the joint portions 61 adjacent to each other in the radial direction R with respect to all the joint portions 61 constituting the radial direction arrangement portion 62.
- the wave winding coil set 9 as shown in FIG. 3 is formed by the two wave winding coil portions 8 in which the conductor side portions 31 are inserted into the same slot 3.
- the conductor side 31 of one wave winding coil part 8 and the conductor side part 31 of the other wave winding coil part 8 constituting one wave winding coil set 9 are alternately arranged in the radial direction R in the slot 3. Between the slots 3 adjacent to each other in the circumferential direction C (in this example, six slots apart from each other). 3), and the order of the radial direction R is changed.
- the coil 4 is formed by arranging six wave winding coil sets 9 having the above-described configuration in the circumferential direction C so as to be shifted from each other by one slot pitch.
- the projecting portions 7 of the segment conductors 5 are adjacently arranged so as to be parallel to the projecting portions 7 of the adjacent same-layer segment conductors and aligned in the same radial direction R position.
- the projecting portions 7 of the plurality of segment conductors 5 in which the conductor side portions 31 are arranged in the same layer in the slot 3 have the main body portions 73 extending in parallel with each other (that is, the extending directions are mutually different). Are arranged adjacent to each other so as to be aligned in the same radial R position.
- the main body 73 is formed in an arc shape parallel to the core reference plane S as viewed in the axial direction L. Accordingly, the protruding portions 7 of the plurality of segment conductors 5 in which the conductor side portions 31 are arranged in the same layer in the slot 3 are arranged so as to be cylindrical as a whole.
- the main body portions 73 of the two segment conductors 5 of the same layer in which the conductor side portions 31 are disposed in the adjacent slots 3 are disposed so as to extend in parallel to each other at the same position in the radial direction R. At the same time, they are arranged at positions shifted in the circumferential direction C by one slot pitch.
- these two main body portions 73 are arranged so as to be aligned on the cylindrical surface, and part of the region in the circumferential direction C where they exist, specifically, the circumferential first direction C1 side and the circumferential second In the central region in the circumferential direction C excluding the region corresponding to one slot pitch at each end portion on the direction C2 side, they are arranged so as to face each other in the axial direction L.
- the main body 73 is formed in an arc shape parallel to the core reference plane S as viewed in the axial direction L, so that the main body 73 is projected from the other segment conductors 5 present on both sides in the radial direction R. It can be arranged without causing interference with the part 7 (main body part 73).
- the main body portion 73 extends in the circumferential direction C through the same position in the radial direction R as the conductor side portion 31 of the segment conductor 5 including the main body portion 73. , And arranged along a cylindrical surface parallel to the core reference surface S.
- the main body portion 73 is moved in the radially outward direction R2 by the protrusion portions 7 of the other segment conductors 5. It is arranged so as to extend in the circumferential direction C between both sides on the side and the radial direction R1 side.
- the offset bending portion 13 includes the tip portion 71 of the projection portion 7 to be joined provided in the segment conductor to be joined, and the tip portion of the projection portion 7 provided in the adjacent same-layer segment conductor with respect to the segment conductor to be joined. 71 in the circumferential direction C.
- the protruding portion 7 of the segment conductor 5 of interest is “7A”
- the protruding portion to be joined of the protruding portion 7 is “7B”
- the segment conductor 5 having the protruding portion 7B to be joined joint (joining target segment conductor)
- the protrusion 7 of the adjacent same-layer segment conductor is indicated by the reference numeral “7C” and hatched.
- the main body 73 of the protruding portion 7A of the segment conductor 5 of interest extends from the conductor side 31 side toward the second circumferential direction C2.
- the offset bending part 13 provided in the said protrusion part 7A offsets the front-end
- the segment conductor 5 (the bonding target segment) including the bonding target protruding portion 7B.
- the offset bent portion 13 provided in the protruding portion 7A is a circumference between the distal end portion 71 of the bonding target protruding portion 7B provided in the bonding target segment conductor and the protruding portion 7C of the adjacent same-layer segment conductor with respect to the bonding target segment conductor.
- the protruding portion 7A is bent in the radial direction R (in the illustrated example, the radial inner direction R1) to offset the distal end portion 71 of the protruding portion 7A.
- the offset bent portion 13 and the tip portion 71 are arranged between the length in the circumferential direction C that is equal to or less than one slot pitch between the tip portion 71 of the joining target projecting portion 7B and the tip portion 71 of the projecting portion 7C. ing.
- the offset bending part 13 which offsets the front-end
- the tip portions 71 of the two projecting portions 7 can be arranged so that the joining surfaces 60 formed in the two projecting portions 7 face each other in the circumferential direction C.
- the protrusions 7 of the plurality of segment conductors 5 can be formed while avoiding interference between the segment conductors 5 without processing the protrusions 7. It is possible to arrange with high density. As a result, the coil end portion projecting L in the axial direction from the stator core 2 is suppressed from increasing in the radial direction R and the axial direction L.
- the slot 3 is provided with the opening 3a on the radial inner side R1 side.
- the width in the circumferential direction C of the opening 3a is set to a width that allows the conductor side 31 of the segment conductor 5 to be inserted in the radial direction R.
- the width in the circumferential direction C of the opening 3 a is set to be larger (slightly larger in this example) than the width in the circumferential direction C of the conductor side portion 31 of the segment conductor 5.
- the segment conductor 5 in a state where the bent portions (the first circumferential direction bent portion 11, the second circumferential direction bent portion 12, and the offset bent portion 13) are formed in advance from the radially inward direction R1 side is slotted. 3 can be configured to be inserted.
- the segment conductors 5 can be joined to each other without being bent or the like after the insertion into the slot 3 and the segment conductors 5 are insulated by such processing.
- the film is not damaged.
- the insulating film covering the segment conductor 5 is not damaged when inserted into the slot 3.
- stator 1 is advantageous in terms of manufacturability.
- the offset amount d of the offset bent portion 13 provided in each of the two projecting portions 7 joined to each other is half the thickness of the linear conductor in the radial direction R (half layer).
- the configuration described above is described as an example.
- the embodiment of the present invention is not limited to this, and the offset amount d of the offset bending portion 13 provided in each of the two protrusions 7 joined to each other can be appropriately changed independently of each other. . In this case, it is preferable to make the sum of the offset amounts d of the two offset bent portions 13 coincide with the thickness of the linear conductor in the radial direction R.
- the distal end portion 71 of the protruding portion 7 is a target to be joined in the circumferential direction C view. It is necessary to set each offset amount d so that at least a part thereof overlaps the tip portion 71 of the protruding portion. And the surface which mutually opposes in the circumferential direction C in the duplication part is made into the joining surface 60.
- tip part 71 of the protrusion part 7 does not necessarily need to be arrange
- the radial direction R position can be appropriately changed.
- the offset amount d of the offset bending portion 13 provided in one projecting portion 7 is set to the thickness (one layer) in the radial direction R of the linear conductor (FIG. 8 ( b)).
- the surface of the distal end portion 71 of the projecting portion 7 facing the opposite side to the conductor side portion 31 of the segment conductor 5 provided with the distal end portion 71 in the circumferential direction C is the joining surface 60.
- the above configuration has been described as an example.
- the embodiment of the present invention is not limited to this, and as shown in FIG. 9, the conductor of the segment conductor 5 provided with the tip portion 71 in the circumferential direction C at the tip portion 71 of the protruding portion 7. It is also possible to adopt a configuration in which the surface facing the side portion 31 side is the bonding surface 60. In such a configuration, the two projecting portions 7 to be joined to each other are arranged so as to intersect each other in the radial direction R.
- the joint surfaces 60 formed so as to hook the projecting portions 7 to each other. Can be positioned so as to face each other in the circumferential direction C.
- the offset bent portion 13 is provided in the distal end portion 71 of the protrusion 7 to be joined provided in the segment conductor to be joined and the adjacent same-layer segment conductor with respect to the segment conductor to be joined. It is preferable to provide it in the circumferential direction C with the tip 71 of the protrusion 7.
- the offset amount d of the offset bent portion 13 provided in each of the two projecting portions 7 joined to each other can be appropriately changed independently of each other.
- the offset amount d of the offset bent portion 13 provided in each of the two projecting portions 7 joined to each other is the thickness in the radial direction R of the linear conductor. It is set to a half (half layer) (see FIG. 9B).
- it can also be set as the structure by which the offset bending part 13 was provided only in one instead of both the two protrusion parts 7 joined mutually.
- the offset amount d of the offset bending portion 13 provided in one projecting portion 7 is set to the thickness (one layer) in the radial direction R of the linear conductor (FIG. 10 ( b)).
- the configuration in which the offset bending portion 13 is provided at a position adjacent to the distal end portion 71 side with respect to the second circumferential direction bending portion 12 has been described as an example.
- the embodiment of the present invention is not limited to this, and the offset bent portion 13 is provided at the same position as the second circumferential bent portion 12 or the conductor side portion with respect to the second circumferential bent portion 12. It can be provided at a position adjacent to the 31 side. In the latter case, it is preferable that the offset bent portion 13 is formed in a crank shape (here, a crank shape with an obtuse angle) as viewed in the axial direction L.
- the configuration in which the offset bent portion 13 is formed on both the pair of projecting portions 7 is basically described for all the segment conductors 5 as an example.
- all the segment conductors 5 may have a configuration in which the offset bent portion 13 is formed only on one of the pair of projecting portions 7. .
- the segment conductors 5 are arranged so that the protruding portion 7 formed with the offset bent portion 13 is positioned on the first axial direction L1 side with respect to the stator core 2, and the coil on the first axial direction L1 side is arranged.
- the two projecting portions 7 to be joined to each other are joined so that the joining surfaces 60 formed at the respective distal end portions 71 face each other in the circumferential direction C, and the second axial direction L2
- the two protruding portions 7 to be bonded to each other can be configured such that the bonding surfaces formed at the respective tip portions 71 are bonded to each other in the radial direction R.
- segment conductor 5 in which the offset bent portion 13 is formed on both of the pair of protruding portions 7 and the segment conductor 5 in which the offset bent portion 13 is not formed on both of the pair of protruding portions 7 are joined to each other.
- Each segment conductor 5 can also be configured such that one of the two protruding portions 7 becomes the protruding portion 7 having the offset bent portion 13.
- the segment conductor to be joined for each of the segment conductors 5 is adjacent to the conductor side 31 of the segment conductor 5 in the slot 3 different from the slot 3 in which the segment conductor 5 is disposed.
- the configuration of the other segment conductor 5 in which the conductor side portion 31 is arranged at the radial direction R position (adjacent layer) is described as an example.
- the embodiment of the present invention is not limited to this, and the segment conductors to be joined of at least some of the segment conductors 5 have the same radial R position (same layer) as the conductor side 31 of the segment conductor 5.
- the configuration in which the distal end portion 71 of the projecting portion 7 is arranged to extend in parallel with the extending direction of the distal end portion 71 of the joining target projecting portion has been described as an example.
- the embodiment of the present invention is not limited to this, and the extending direction of the distal end portion 71 of the protruding portion 7 and the extending direction of the distal end portion 71 of the joining target protruding portion are not parallel to each other. It can also be.
- the extending direction of at least one of the two tip portions 71 joined to each other is a direction inclined in the radial direction R with respect to the axial direction L as viewed in the circumferential direction C, and the two tip portions 71 are in the circumferential direction. It can also be set as the structure arrange
- the offset bent portion 13 is provided on both of the two protruding portions 7 joined to each other, and each offset bent portion 13 includes only one bent portion. It can be.
- both the two tip portions 71 joined to each other are inclined in a direction closer to the other tip portion 71 in the radial direction R with respect to the axial direction L when viewed in the circumferential direction C. It is formed to extend.
- the configuration in which the main body portion 73 of the projecting portion 7 is formed in an arc shape parallel to the core reference surface S as viewed in the axial direction L has been described as an example.
- the embodiment of the present invention is not limited to this.
- the main body 73 has a shape in which a straight line is bent in one or more places in the circumferential direction C as viewed in the axial direction L.
- the main body portion 73 is arranged roughly along the core reference plane S, and such a main body portion 73 interferes with the protruding portions 7 of the other segment conductors 5. It is preferable that the shape is such that it can be arranged.
- the main body 73 of the projecting portion 7 is described as an example of a configuration in which the main body 73 is formed in a linear shape extending in a direction inclined with respect to the extending direction of the conductor side portion 31 when viewed in the radial direction R. did.
- the embodiment of the present invention is not limited to this.
- the main body 73 may have a curved shape that is curved in the radial direction R, or a shape that is bent at one or a plurality of locations in the radial direction R as one of the preferred embodiments of the present invention. is there.
- the main body 73 is disposed adjacent to and parallel to the protruding portion 7 of the adjacent same-layer segment conductor and aligned in the same radial position, for example, the plurality of segment conductors 5 disposed in the same layer
- the plurality of segment conductors 5 have a common shape, such as an arc shape that curves with the same curvature.
- the configuration in which the width in the circumferential direction C of the opening 3a of the slot 3 is set to a width that allows the conductor side 31 of the segment conductor 5 to be inserted in the radial direction R has been described as an example.
- the embodiment of the present invention is not limited to this, and the width in the circumferential direction C of the opening 3a may be set to be narrower than the portion on the radial direction R2 side. .
- the segment conductor 5 in a state where at least one of the pair of protrusions 7 is linearly formed in the radial direction R is inserted in the axial direction L with respect to the slot 3. Later, a necessary bent portion can be formed.
- the configuration in which the shape of the cross section perpendicular to the extending direction of the linear conductor constituting the segment conductor 5 is rectangular has been described as an example.
- the embodiment of the present invention is not limited to this, and the cross-sectional shape of the linear conductor may be a circular shape, an elliptical shape, a polygonal shape other than a rectangular shape, or the like.
- the present invention includes an armature core in which a plurality of slots extending in the axial direction of a cylindrical core reference surface are distributed in the circumferential direction of the core reference surface, and a coil wound around the armature core. It can utilize suitably for the armature for rotary electric machines.
- Stator armature for rotating electrical machine
- Stator core armature core
- Slot 3a Opening 4: Coil 5: Segment conductor 7: Protruding part 13: Offset bending part 31: Conductor side part 60: Joining surface 62: Radial array part 71: Tip part 73: Body part L: Axial direction C: Circumferential direction R: Radial direction S: Core reference plane
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Abstract
Description
なお、上記のような電気的絶縁性の確保は、接合部で互いに接合される2つの突出部の長さの比を、径方向に隣接する接合部間で異なる値とすることなく実現可能である。すなわち、本発明では、接合部で互いに接合される2つの突出部の長さの比を、径方向に隣接する接合部間で異なる値とする必要は必ずしもなく、例えば、径方向に隣接する接合部同士で、2つの突出部の長さの比を共通にすることも可能である。
以上のように、上記の特徴構成によれば、複数のセグメント導体の形状の共通化を図ることを容易として製造コストの増大を抑制しつつ、径方向に隣接する接合部の間の電気的絶縁性を容易に確保することができる。
本実施形態に係るステータ1の全体構成について説明する。図1は、ステータ1が備えるコイル4を構成する波巻コイル部8を示している。図1では、発明の理解を容易にすべく、後述する第一層セグメント導体5aにハッチングを施すとともに、第二層セグメント導体5bに、第一層セグメント導体5aより明るいハッチングを施している。この波巻コイル部8は、図2に示すようなセグメント導体5を複数用いて構成されており、波巻コイル部8の全体で、ステータコア2(図4参照)を5周(5巡回)する5ターン分の波巻コイルが形成されている。
次に、コイル4を構成するセグメント導体5の構成について説明する。なお、以下の説明では、セグメント導体5のそれぞれに対して、接合対象となる他のセグメント導体5を「接合対象セグメント導体」とするとともに、接合対象セグメント導体が備える接合対象の突出部7を「接合対象突出部」とする。また、セグメント導体5のそれぞれに対して、隣接するスロット3内の同じ径方向R位置(同じ層)に導体辺部31が配置された他のセグメント導体5を「隣接同層セグメント導体」とする。なお、本実施形態に係るコイル4は、電源や中性点に接続される端部やターン間の接続部を構成するセグメント導体として、以下に説明するセグメント導体5とは形状の異なる異形セグメント導体を備えるが、ここでは異形セグメント導体についての説明は省略する。
次に、上述したセグメント導体5により形成されるコイル4の構成について説明する。上記のように、コイル4は、図1に示すような波巻コイル部8を複数備えている。図1に示すように、波巻コイル部8は、異なるスロット3内の互いに隣接する層に導体辺部31が配置された一対のセグメント導体5の突出部7同士を、周第一方向C1側に向かって軸方向Lの一方側と他方側とで交互に順次接合して構成されている。具体的には、波巻コイル部8は、互いに1磁極ピッチ(本例では、6スロットピッチ)分離れたスロット3内に導体辺部31が配置された、互いに隣接する層の奇数層セグメント導体と偶数層セグメント導体とを周第一方向C1側に向かって順次接合することで形成されている。
最後に、本発明に係るその他の実施形態を説明する。なお、以下の各々の実施形態で開示される特徴は、その実施形態でのみ利用できるものではなく、矛盾が生じない限り、別の実施形態にも適用可能である。
2:ステータコア(電機子コア)
3:スロット
3a:開口部
4:コイル
5:セグメント導体
7:突出部
13:オフセット屈曲部
31:導体辺部
60:接合面
62:径方向配列部
71:先端部
73:本体部
L:軸方向
C:周方向
R:径方向
S:コア基準面
Claims (8)
- 円筒状のコア基準面の軸方向に延びるスロットが当該コア基準面の周方向に複数分散配置されてなる電機子コアと、前記電機子コアに巻装されるコイルと、を備えた回転電機用電機子であって、
前記コイルは、前記スロット内に配置される導体辺部と、前記導体辺部から延びて前記電機子コアから軸方向両側に突出し、前記電機子コアから軸方向に徐々に離れるように前記導体辺部の延在方向に対して前記周方向に傾斜して延びる一対の突出部と、を備えるセグメント導体を複数用いて構成され、
前記一対の突出部は、前記周方向に関する延在方向が互いに反対方向とされ、
前記突出部のそれぞれは、接合対象となる他の前記セグメント導体である接合対象セグメント導体の前記突出部に接合され、
互いに接合される2つの前記突出部の少なくとも一方が、前記コア基準面の径方向における他方の前記突出部に近づく側に先端部をオフセットさせるオフセット屈曲部を備え、
当該2つの前記突出部のそれぞれの先端部に形成された接合面同士が、互いに前記周方向に対向して接合されている回転電機用電機子。 - 前記セグメント導体のそれぞれに対して、隣接する前記スロット内の同じ径方向位置に前記導体辺部が配置された他の前記セグメント導体が隣接同層セグメント導体であり、
前記オフセット屈曲部は、前記接合対象セグメント導体が備える接合対象の前記突出部の先端部と、当該接合対象セグメント導体に対する前記隣接同層セグメント導体が備える前記突出部の先端部と、の前記周方向における間に設けられている請求項1に記載の回転電機用電機子。 - 前記セグメント導体のそれぞれに対して、隣接する前記スロット内の同じ径方向位置に前記導体辺部が配置された他の前記セグメント導体が隣接同層セグメント導体であり、
前記セグメント導体のそれぞれの前記突出部が、前記隣接同層セグメント導体の前記突出部と平行かつ同じ径方向位置に並ぶように隣接配置されている請求項1又は2に記載の回転電機用電機子。 - 前記セグメント導体のそれぞれについての前記接合対象セグメント導体は、当該セグメント導体が配置された前記スロットとは異なる前記スロット内における当該セグメント導体の前記導体辺部と隣接する径方向位置に前記導体辺部が配置された他の前記セグメント導体である請求項1から3のいずれか一項に記載の回転電機用電機子。
- 前記2つの突出部の前記接合面同士の接合部が、前記径方向に並んで複数配置されてなる径方向配列部を複数有し、
前記径方向配列部のそれぞれを構成する複数の前記接合部が、均等な径方向間隔で配置されている請求項1から4のいずれか一項に記載の回転電機用電機子。 - 前記スロットは、前記コア基準面の径方向の一方側に開口部を備え、
前記開口部の前記周方向の幅が、前記導体辺部を前記径方向に挿入可能な幅に設定されている請求項1から5のいずれか一項に記載の回転電機用電機子。 - 前記突出部の先端部は、接合対象の前記突出部である接合対象突出部の先端部と同じ径方向位置で、当該接合対象突出部の先端部の延在方向に平行に延びるように形成されている請求項1から6のいずれか一項に記載の回転電機用電機子。
- 前記突出部の前記周方向に延在する本体部は、前記コア基準面の径方向視で前記導体辺部の延在方向に対して傾斜する方向に延びる直線状であって、前記コア基準面の軸方向視で前記コア基準面に平行な円弧状に形成されている請求項1から7のいずれか一項に記載の回転電機用電機子。
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DE112011100076T DE112011100076T5 (de) | 2010-02-18 | 2011-01-31 | Anker für eine drehende Elektromaschine |
JP2012500543A JPWO2011102210A1 (ja) | 2010-02-18 | 2011-01-31 | 回転電機用電機子 |
US13/509,217 US20120228984A1 (en) | 2010-02-18 | 2011-01-31 | Armature for rotating electric machine |
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- 2011-01-05 WO PCT/JP2011/050052 patent/WO2011102150A1/ja active Application Filing
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Also Published As
Publication number | Publication date |
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JPWO2011102150A1 (ja) | 2013-06-17 |
DE112011100077T5 (de) | 2012-10-31 |
CN102668333A (zh) | 2012-09-12 |
JPWO2011102210A1 (ja) | 2013-06-17 |
US20120228984A1 (en) | 2012-09-13 |
US8581460B2 (en) | 2013-11-12 |
WO2011102150A1 (ja) | 2011-08-25 |
CN102656775A (zh) | 2012-09-05 |
US20110198953A1 (en) | 2011-08-18 |
DE112011100076T5 (de) | 2012-10-31 |
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