WO2022201878A1 - ステータ - Google Patents
ステータ Download PDFInfo
- Publication number
- WO2022201878A1 WO2022201878A1 PCT/JP2022/003826 JP2022003826W WO2022201878A1 WO 2022201878 A1 WO2022201878 A1 WO 2022201878A1 JP 2022003826 W JP2022003826 W JP 2022003826W WO 2022201878 A1 WO2022201878 A1 WO 2022201878A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- lead wire
- lead
- power line
- resin
- portions
- Prior art date
Links
- 239000011347 resin Substances 0.000 claims abstract description 123
- 229920005989 resin Polymers 0.000 claims abstract description 123
- 238000000926 separation method Methods 0.000 claims abstract description 13
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims description 181
- 238000005491 wire drawing Methods 0.000 claims description 5
- 230000035882 stress Effects 0.000 description 12
- 239000004020 conductor Substances 0.000 description 11
- 230000000875 corresponding effect Effects 0.000 description 9
- 239000000463 material Substances 0.000 description 7
- 238000007654 immersion Methods 0.000 description 6
- 230000006866 deterioration Effects 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000004308 accommodation Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000008642 heat stress Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Images
Classifications
-
- 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
- H02K3/50—Fastening of winding heads, equalising connectors, or connections thereto
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
- H02K1/182—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures to stators axially facing the rotor, i.e. with axial or conical air gap
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/16—Stator cores with slots for windings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2201/00—Specific aspects not provided for in the other groups of this subclass relating to the magnetic circuits
- H02K2201/03—Machines characterised by aspects of the air-gap between rotor and stator
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
Definitions
- the present invention relates to a stator.
- a stator that has a power wire portion that is joined to a lead wire portion of a coil.
- a stator is disclosed, for example, in JP-A-2019-68494.
- Japanese Patent Laying-Open No. 2019-68494 discloses a rotating electrical machine stator that includes a stator core and three-phase coils having coil end portions protruding from the axial end face of the stator core. Further, the rotating electric machine stator includes power lines connected (joined) to three input terminal portions of a three-phase coil via joint portions, respectively, and a resin mold for integrally fixing the coil end portions and the joint portions. Prepare. The input terminal portion and the power line that are joined to each other are arranged in a state of facing each other in the radial direction and adjacent to each other (adjacent) inside the resin mold.
- the input terminal portion and the power line that are joined to each other are arranged in the resin mold so as to face each other in the radial direction and be adjacent to each other.
- a small gap may be formed between the input terminal portion and the power line.
- a resin layer having a small thickness is formed in the minute gap.
- This thin (thin) resin layer has low durability due to its small thickness. Therefore, when stress is applied to the resin layer during operation of the rotating electrical machine, the resin layer is damaged. In this case, there is a problem that the insulating property of the resin mold (resin portion) deteriorates due to the breakage of the resin layer.
- the present invention has been made to solve the above-described problems, and one object of the present invention is to solve the problems described above, and one object of the present invention is to reduce the insulation of the resin portion due to breakage of the thin resin layer in the resin portion. Another object of the present invention is to provide a stator capable of preventing the occurrence of
- a stator includes a stator core including slots, a slot accommodating portion accommodated in the slot, a coil end portion projecting from an end face in the axial direction of the stator core, a lead wire portion to which electric power is supplied; a joint portion that joins with the end portion side portion of the lead wire portion; A power line portion that supplies power from the outside to the coil, and a resin portion that is provided to cover the lead wire portion and the power line portion.
- the lead wire portion and the power wire portion respectively include a lead wire lead-out portion and a power wire lead-out portion drawn out from the resin portion, and the lead wire portion between the end portion side portion and the lead wire lead-out portion
- At least one of the portion and the portion of the power line portion between the facing portion and the power line drawing portion is configured to extend the lead wire drawing portion and the power line drawing portion in the direction in which the end side portion and the facing portion face each other. It includes a lead-out part separating part for drawing out from the resin part while being separated by a distance larger than the maximum value of the width of the gap.
- the lead wire lead-out portion and the power wire lead-out portion are larger than the maximum width of the gap between the end side portion and the facing portion due to the lead portion separation portion. It is pulled out from the resin portion while being separated by a distance. As a result, the separation distance between the portion of the lead wire portion between the end portion side portion and the lead wire drawing portion and the portion of the power line portion between the opposing portion and the power line drawing portion is relatively large. be able to. As a result, in the resin portion, a thin resin is formed between the lead wire portion between the end side portion and the lead wire extraction portion and the power wire portion between the opposing portion and the power wire extraction portion. Layers can be prevented from forming. Thereby, the amount of the thin resin layer formed in the resin portion can be reduced. As a result, it is possible to prevent deterioration of the insulating properties of the resin portion due to breakage of the thin resin layer due to stress.
- the present invention it is possible to prevent deterioration of the insulating properties of the resin portion due to breakage of the thin resin layer inside the resin portion.
- FIG. 1 is a plan view showing the configuration of a rotating electric machine according to one embodiment
- FIG. 1 is a perspective view showing the configuration of a stator according to one embodiment
- FIG. 4 is a front view showing the internal configuration of the immersed resin portion of the stator according to one embodiment
- FIG. It is the top view which looked at the immersion resin part by one Embodiment from the Z2 direction side.
- FIG. 4 is a front view of a lead wire portion and a power wire portion in an immersed resin portion according to one embodiment, viewed from the radially outer side
- FIG. 6 is a cross-sectional view along line 200-200 of FIG. 5;
- stator 100 The structure of a stator 100 according to this embodiment will be described with reference to FIGS. 1 to 6.
- FIG. 1 the axial direction, radial direction, and circumferential direction of stator core 10 (see FIG. 1) included in stator 100 are defined as Z direction, R direction, and C direction, respectively.
- one side and the other side in the axial direction (Z direction) are defined as the Z1 side and the Z2 side, respectively.
- the inner side and the outer side in the radial direction (R direction) are defined as the R1 side and the R2 side, respectively.
- the stator 100 constitutes a part of the rotating electric machine 120 together with the rotor 110 .
- Rotating electric machine 120 is, for example, a motor, a generator, or a motor/generator.
- Rotor 110 is arranged on the R1 side of stator 100 so as to face stator 100 in the R direction. That is, the stator 100 is configured as a part of the inner rotor type rotating electric machine 120 . 1, for the sake of simplification, illustration of a power line portion 30 (see FIG. 2) and an immersed resin portion 40 (see FIG. 2), which will be described later, is omitted.
- the stator 100 includes a stator core 10.
- the stator core 10 has a cylindrical shape with a central axis A (rotational axis of the rotor 110) along the Z direction.
- Stator core 10 is formed by stacking a plurality of electromagnetic steel sheets (for example, silicon steel sheets) in the Z direction.
- the stator core 10 includes an annular back yoke 11, a plurality of teeth 12 projecting from the back yoke 11 toward the R1 side, and a plurality of slots 13 formed between adjacent teeth 12 in the C direction. Slot 13 is formed to extend in the Z direction.
- the slots 13 are open on both the Z1 side and the Z2 side. Also, the slot 13 is open on the R1 side when viewed from the Z direction.
- the stator 100 includes coils 20 .
- Coils 20 are arranged on stator core 10 .
- Coils 20 are provided to correspond to three phases (U-phase, V-phase and W-phase).
- the coil 20 is configured by electrically connecting a plurality of segment conductors.
- the coil 20 is a rectangular wire (rectangular conductor) having a substantially rectangular cross section.
- Coil 20 is made of copper or aluminum.
- the coil 20 includes a slot accommodation portion 21 (see FIG. 2), a coil end portion 22 (see FIG. 2), and a lead wire portion 23.
- the slot accommodating portion 21 is accommodated within the slot 13 .
- the coil end portion 22 is connected to the slot accommodating portion 21 and protrudes outside the slot 13 from the end surface 10a of the stator core 10 in the Z direction.
- the lead wire portion 23 is configured to be supplied with power from outside the stator 100, as will be described later.
- An end portion 23 a (see FIG. 6 ) of the lead wire portion 23 is provided on the R2 side with respect to the coil end portion 22 .
- the coil 20 includes multi-phase (three-phase in this embodiment) lead wire portions 23 .
- the coil 20 includes an in-phase lead wire portion 230 (see FIG. 3) in which a plurality of (two in this embodiment) lead wire portions 23 in phase with each other are arranged adjacent to each other in the circumferential direction.
- In-phase lead wire portion 230 is provided for each of a plurality of phases. Specifically, two U-phase, V-phase, and W-phase lead wire portions 23 are provided.
- the lead wire portion 23 includes a radial portion 23b (see FIG. 6) extending radially outward from the coil end portion 22 side (R1 side) and an axial direction (Z1 side) and an axial portion 23c (see FIG. 6). That is, the lead wire portion 23 is formed in an L shape. Note that the lead wire portion 23 may have a shape other than the L shape. Further, the end portion side portion 23a of the lead wire portion 23 is a part of the axial portion 23c of the lead wire portion 23 on the Z1 side. The end portion 23a is a portion of a bare conductor from which an insulating coating (not shown) has been removed. Further, the axial portion 23c is covered with an insulating coating (not shown).
- the stator 100 includes a power line section 30 that supplies electric power to the coils 20 from the outside.
- the power line portion 30 is provided so as to correspond to each of the three-phase lead wire portions 23 . That is, three power line portions 30 are provided.
- the power from the outside is, for example, power supplied from an inverter.
- the power line portion 30 is, for example, a bus bar or the like.
- each of the lead wire portion 23 and the power wire portion 30 is formed of a rectangular conductor. That is, the cross section of each of lead wire portion 23 and power wire portion 30 has a rectangular shape.
- a circumferential width W2 (see FIG. 5) of the lead wire portion 23, which will be described later, is substantially equal to a circumferential width W3 (see FIG. 5) of the connecting portion 31 and the opposing portion 32 of the power line portion 30, which will be described later.
- the stator 100 also includes an immersion resin portion 40 provided to cover the lead wire portion 23 and the power line portion 30 .
- the immersed resin portion 40 is obtained by immersing the lead wire portion 23 and the power line portion 30 provided on the coil end portion 22 side (Z1 direction side) from the end surface 10a of the stator core 10 in a resin material (liquid resin material). formed.
- the immersed resin portion 40 is formed by thermally curing the resin material while the lead wire portion 23 and the power line portion 30 are immersed in the resin material.
- the immersed resin portion 40 is provided in an annular shape (see FIG. 2) so as to cover the end surface 10a of the annular stator core 10 from the Z1 side.
- the immersed resin portion 40 is an example of the "resin portion" in the claims.
- the immersed resin portion 40 is provided so as to cover the axial portion 23c of the lead wire portion 23 and the joint portion 31, the facing portion 32 and the offset portion 34 of the power line portion 30, which will be described later. It is
- the power line portion 30 also includes a joint portion 31 that joins the end portion side portion 23 a of the lead wire portion 23 . Further, the power line portion 30 includes a facing portion 32 arranged continuously with the joint portion 31 . The facing portion 32 is provided continuously with the joint portion 31 on the Z2 side of the joint portion 31 . Further, the opposing portion 32 is provided adjacent to the end portion 23a of the lead wire portion 23 so that a gap C1 (see FIG. 6) is provided between the lead wire portion 23 and the end portion 23a. That is, a part of the end portion 23a of the lead wire portion 23 on the Z1 side is joined to the joint portion 31 of the power line portion 30, and the remaining portion of the end portion 23a on the Z2 side is connected. is provided so as to face the facing portion 32 of the power line portion 30 in the radial direction.
- the power line portion 30 is formed such that the position of the joint portion 31 is shifted from the position of the facing portion 32 toward the lead wire portion 23 (R1 side). Specifically, a shift portion 32a is provided between the joint portion 31 and the facing portion 32 to shift the facing portion 32 to the R2 side (the direction away from the lead wire portion 23). Thereby, a gap C ⁇ b>1 , which will be described later, is formed between the facing portion 32 and the lead wire portion 23 .
- the dashed line indicates the boundary between the end portion 23a, which is a bare conductor, and the axial portion 23c, which is covered with an insulating film.
- the lead wire portion 23 includes a lead wire lead-out portion 23d that is led out from the submerged resin portion 40.
- the power line portion 30 also includes a power line lead-out portion 33 that is drawn out from the submerged resin portion 40 .
- each of lead wire lead-out portion 23d and power wire lead-out portion 33 is led out from resin side end face 41 provided on the side of end face 10a of stator core 10 .
- the resin-side end surface 41 is a surface on the side of the end surface 10a of the stator core 10 provided in the projecting resin portion 40b (see FIG. 2) of the immersed resin portion 40.
- the resin-side end surface 41 is a surface extending perpendicular to the axial direction.
- the lead wire lead-out portion 23 d means a portion of the lead wire portion 23 that is led out from the immersed resin portion 40 , near the resin side end surface 41 .
- the power line lead-out portion 33 means a portion in the vicinity of the resin side end surface 41 of the portion of the power line portion 30 that is led out from the submerged resin portion 40 .
- the resin side end face 41 is provided so as to protrude radially outward from the end face 10a of the stator core 10 (see FIG. 3).
- the power line lead-out portions 33 of the power line portion 30 corresponding to each of the three-phase lead wire portions 23 are provided at substantially the same position in the radial direction. In other words, the radial distances (not labeled) between each of the three power line lead-out portions 33 and the central axis A (see FIG. 1) are substantially equal.
- offset portions 34 (see FIG. 3) provided in the three-phase power line portions 30, which will be described later, are also provided at substantially the same positions in the radial direction, similar to the power line lead-out portions 33. As shown in FIG.
- the portion of the power line portion 30 between the facing portion 32 and the power line lead portion 33 connects the lead wire lead portion 23d and the power line lead portion 33 together.
- the distance (L1, L2) (see FIG. 4) larger than the maximum value of the width W1 (see FIG. 6) of the gap C1 in the direction in which the side portion 23a and the facing portion 32 face each other (radial direction in this embodiment). It includes an offset portion 34 for withdrawing from the submerged resin portion 40 in a spaced apart manner.
- FIG. 4 schematically illustrates the distances L1 and L2.
- the distances (L1, L2) mean the shortest distances between the lead wire lead-out portion 23d and the power line lead-out portion 33.
- the offset portion 34 is an example of the “drawer portion separating portion” in the scope of claims.
- the lead wire lead-out portion 23d and the power wire lead-out portion 33 are led out from the submerged resin portion 40 in a state of being shifted (offset) by the offset portion 34 instead of facing each other in the radial direction.
- the distances (L1, L2) are equal to or larger than the width W2 (see FIG. 5) of the lead wire portion 23 in the circumferential direction, which will be described later.
- the power line portion 30 corresponding to each of the plurality of phases includes a plurality of joint portions 31 that join with the end portion side portions 23a of the plurality of lead wire portions 23 of the corresponding in-phase lead wire portion 230, and a plurality of joint portions 31 and offset portions 34 connecting the plurality of opposing portions 32 and the power line lead-out portion 33 .
- the in-phase lead wire portion 230, the plurality of joint portions 31, and the offset portion 34 are integrally covered with the common immersion resin portion 40, and correspond to each of the plurality of phases.
- the common immersed resin portions 40 protrude radially outward of the stator core 10 and are integrally formed concentrically with each other.
- the in-phase lead wire portion 230, the plurality of joint portions 31, and the offset portion 34, which are provided for each of the plurality of phases, are annularly provided on the end face 10a of the stator core 10 in the immersed resin portion 40. It is covered with a single protruding resin portion 40b (see FIG. 2) formed in an arc shape when viewed from the axial direction.
- the projecting resin portion 40b is formed integrally with the annular resin portion 40a.
- the annular resin portion 40a is provided so as to cover the coil end portion 22 on the end face 10a.
- the offset portion 34 is connected to the facing portion 32 and the power line lead-out portion 33 in the power line portion 30 .
- a first portion 34 a of the offset portion 34 which will be described later, is connected to the facing portion 32 .
- a later-described second portion 34 b of the offset portion 34 is connected to the power line lead-out portion 33 .
- the first portion 34a and the second portion 34b are connected to each other.
- the lead wire portion 23 is not provided with a portion having a function such as the offset portion 34 .
- the lead wire portion 23 is formed linearly in the immersion resin portion 40 along the axial direction.
- the offset portion 34 is arranged so as to extend in the circumferential direction when viewed from the axial direction, and extends from the facing portion 32 (see FIG. 5) to the joint portion of the power line portion 30. 31 (see FIG. 5) is provided so as to extend in a direction approaching the terminal fixing portion 30a (see FIG. 4) arranged at the end on the opposite side.
- FIG. 4 for the sake of simplification, only the offset portion 34 of one phase is indicated by broken lines, but the same applies to other phases.
- the power line lead-out portion 33 is provided in the terminal fixing portion 30a when viewed from the axial direction, and is connected to the center O of the hole portion 30b into which the external terminal is inserted, and the power line lead-out portion 33. is provided so as to be orthogonal to the line segment ⁇ connecting the . That is, the power line lead-out portion 33 is provided so as to extend at an angle ⁇ with respect to the line segment ⁇ .
- the angle ⁇ is 90 degrees.
- FIG. 4 shows an example in which the angle ⁇ is 90 degrees for only one phase, but the other phases are configured similarly.
- the offset portion 34 has a first portion 34a extending from the facing portion 32 along the circumferential direction.
- the offset portion 34 also has a second portion 34 b that extends in the axial direction (Z2 side) from an end portion 34 c of the first portion 34 a opposite to the facing portion 32 and that is connected to the power line lead-out portion 33 .
- the first portion 34a of the offset portion 34 extends orthogonally to the lead wire portion 23 (axial portion 23c) in the immersed resin portion 40 when viewed from the radially outer side. That is, the offset portion 34 is composed of a first portion 34a extending in the circumferential direction and a second portion 34b extending axially from an end portion 34c of the first portion 34a. It has a character shape. Note that the first portion 34a may intersect with the lead wire portion 23 (axial portion 23c) in the immersed resin portion 40 when viewed from the radially outer side, instead of intersecting at right angles.
- the first portion 34a of the offset portion 34 is curved in the circumferential direction from the facing portion 32 extending in the axial direction. That is, the power line portion 30 is provided with a connection portion 35 that connects the first portion 34a of the offset portion 34 and the facing portion 32 and is formed in an arc shape having a predetermined curvature when viewed from the radially outer side. ing.
- the lead wire portions 23 of the same phase among the plurality of lead wire portions 23 are joined to one of the plurality of joint portions 31 branched from the first portion 34 a of the common offset portion 34 .
- the two offset portions 34 (first portion 34a) extending from the facing portion 32 facing the two lead wire portions 23 (end portion side portions 23a) arranged in the circumferential direction are common to each other. It is provided so as to extend in the direction side (the right side of the paper surface in FIG. 5).
- the first portions 34a of the two offset portions 34 are integrally provided (on the right side of the lead wire portion 23 on the right side of the drawing) and connected to a common second portion 34b.
- the direction in which the first portion 34a of the offset portion 34 extends from the facing portion 32 is not limited to the above configuration.
- the direction in which the first portion 34a (see FIG. 5) of the offset portion 34 extends from the facing portion 32 (see FIG. 5) is different.
- only the first portion 34a of the power line portion 30 at the left end of FIG. It is provided so as to extend from the portion 32 to the left side of the drawing.
- the direction in which each of the first portions 34a of the three power line portions 30 extends is not limited to the configuration described above.
- the lead wire lead-out portion 23d and the power line lead-out portion 33 are displaced in the circumferential direction by the first portion 34a of the offset portion 34. , and are spaced apart by a distance (L11, L12) equal to or greater than the width W2 of the lead wire portion 23 in the circumferential direction.
- the distance L11 is the distance in the circumferential direction between the power line lead-out portion 33 and the lead wire lead-out portion 23d closer to the power line lead-out portion 33 of the two lead wire lead-out portions 23d.
- the distance L12 is the distance in the circumferential direction between the power line lead-out portion 33 and the lead wire lead-out portion 23d farther from the power line lead-out portion 33 of the two lead wire lead-out portions 23d.
- the maximum value of the width W1 (see FIG. 6) of the gap C1 is, for example, about 0.5 mm.
- a width W2 of the lead wire portion 23 in the circumferential direction is, for example, about 2.5 mm. That is, the distance (L11, L12) by which the lead wire lead-out portion 23d and the power line lead-out portion 33 are separated in the circumferential direction is at least five times the maximum value of the width W1 of the gap C1.
- the second portion 34b of the offset portion 34 and the lead wire portion 23 are spaced apart from each other by the distances (L11, L12) along the circumferential direction. That is, the thickness (not labeled) along the circumferential direction of the resin layer between the second portion 34b of the offset portion 34 and the lead wire portion 23 has a size corresponding to the distances (L11, L12). .
- the distances (L1, L2) between the lead wire lead-out portion 23d and the power line lead-out portion 33 are distances that are correlated with the circumferential distances (L11, L12).
- the axial thickness t of the portion 42 of the submerged resin portion 40 between the first portion 34a of the offset portion 34 and the resin-side end surface 41 is the maximum of the radial width W1 of the gap C1. Greater than value. That is, of the lead wire portion 23 in the immersed resin portion 40, the axial length L3 of the portion that is not adjacent to the power line portion 30 in the radial direction but is offset in the circumferential direction is equal to the thickness t of the portion 42. It corresponds and is larger than the maximum value of the width W1 of the gap C1.
- the thickness t of the portion 42 in the axial direction is greater than the maximum value of the width W1 of the gap C1 in the radial direction and is equal to or greater than the width W2 of the lead wire portion 23 in the circumferential direction. That is, the thickness t of the portion 42 is also at least five times the maximum value of the width W1 of the gap C1, similarly to the distance (L11, L12) between the lead wire lead-out portion 23d and the power line lead-out portion 33 in the circumferential direction. has a size of
- the portion of the lead wire portion (23) between the end portion (23a) and the lead wire lead portion (23d), the opposing portion (32) and the power wire lead portion (33), at least one of the portions of the power line portion (30) between the lead wire lead portion (23d) and the power line lead portion (33) is connected to the end side portion (23a) and the opposing portion (32). ) is separated by a distance (L1, L2) larger than the maximum value of the width (W1) of the gap (C1) in the facing direction, and the drawer part separation part (34) for drawing out from the resin part (40) include.
- the separation distance between the portion of the line portion (30) (offset portion (34)) can be relatively large.
- the lead wire part (23) between the end part (23a) and the lead wire lead part (23d), the facing part (32) and the power wire lead part It is possible to prevent the formation of a thin resin layer between the portion of the power line portion (30) between (33). Thereby, the amount of the thin resin layer formed in the resin portion can be reduced. As a result, it is possible to prevent deterioration of the insulating properties of the resin portion (40) due to breakage of the thin resin layer due to stress.
- the lead-out portion separating portion (34) is connected to the opposing portion (32) and the power line lead-out portion (33) in the power line portion (30).
- the power line lead-out portion (33) can be easily arranged at a position spaced apart from the facing portion (32).
- the lead-out portion separating portion (34) is provided not in the lead wire portion (23) but in the power line portion (30).
- the configuration of the stator (100) can be simplified as compared with the case where the lead-out portion spacing portion (34) is provided in both the lead wire portion (23) and the power line portion (30).
- the manufacturing process of the stator (100) can be simplified.
- the lead wire portion (23) is provided so as to extend in the axial direction within the resin portion (40).
- the end portion (23a) of the lead wire portion (23) and the facing portion (32) of the power line portion (30) are provided so as to face each other in the radial direction.
- the drawer part separation part (34) is provided so as to extend along the circumferential direction from the facing part (32), and the first part (34a) is opposite to the facing part (32) of the first part (34a). and a second portion (34b) extending axially from the side end (34c) and connected to the power line outlet (33).
- the lead wire lead-out portion (23d) and the power line lead-out portion (33) are displaced (offset) in the circumferential direction. ) can be placed.
- the thickness in the circumferential direction of the resin layer between the lead wire portion (23) and the power line portion (30) (the second portion (34b) of the offset portion (34)) is adjusted to the amount of displacement in the circumferential direction. It can be easily enlarged by the corresponding size.
- the lead wire lead-out portion (23d) and the power line lead-out portion (33) are displaced in the circumferential direction by the first portion (34a) of the offset portion (34). Due to their arrangement, they are separated in the circumferential direction by distances (L11, L12) equal to or greater than the width (W2) of the lead wire portion (23) in the circumferential direction. As a result, the lead wire lead portion (23d) and the power wire lead portion (33) are spaced apart by a distance smaller than the width (W2) of the lead wire portion (23) in the circumferential direction.
- the thickness in the circumferential direction of the resin layer between the portion (23) and the power line portion (30) (the second portion (34b) of the offset portion (34)) can be increased.
- each of the lead wire lead-out portion (23d) and the power wire lead-out portion (33) is connected to the resin side end face (41) provided on the end face (10a) side of the stator core (10).
- the thickness (t) in the axial direction of the portion (42) of the resin portion (40) between the first portion (34a) of the offset portion (34) and the resin side end surface (41) is the gap (C1) is greater than the maximum value of the width (W1) in the radial direction of the
- the thickness (t) of the portion (42) of the resin portion (40) between the first portion (34a) of the offset portion (34) and the resin side end face (41) is equal to the diameter of the gap (C1).
- the mechanical strength of the portion (42) can be improved compared to when the width (W1) in the direction is less than or equal to the maximum value. As a result, it is possible to prevent the portion (42) from being damaged by stress, thereby preventing deterioration of the insulating property of the resin portion (40).
- the thickness (t) is greater than the maximum value of the width (W1) of the gap (C1) in the radial direction and is greater than or equal to the width (W2) of the lead wire portion (23) in the circumferential direction.
- the portion (42) is less likely to break due to stress. can be prevented more reliably.
- deterioration of the insulating properties of the resin portion (40) can be prevented more reliably.
- the first portion (34a) of the offset portion (34) is curved in the circumferential direction from the opposing portion (32) extending in the axial direction.
- stress concentrates on the connecting portion between the opposing portion (32) and the first portion (34a). to prevent damage.
- the coil (20) includes multi-phase lead wire portions (23).
- a plurality of lead wire portions (23) are provided for each phase.
- the lead wire portions (23) of the same phase are is joined with one of the As a result, compared to the case where the joint portions (31) to be joined to each of the plurality of lead wire portions (23) in phase with each other are provided so as to extend from offset portions (34) separate from each other, the offset portion (34) can be reduced. As a result, the configuration of the power line portion (30) can be simplified.
- each of the lead wire portion (23) and the power wire portion (30) is formed of a rectangular conductor.
- both the lead wire portion (23) and the power wire portion (30) are rectangular conductors
- at least one of the lead wire portion (23) and the power wire portion (30) is a round conductor (having a circular cross section).
- the width (W1 ) are relatively narrow. Therefore, the portion of the lead wire portion (23) between the end portion (23a) and the lead wire outlet (23d) and the power between the opposing portion (32) and the power wire outlet (33)
- At least one of the wire portions (30) includes the lead portion spacing portion (34) to prevent the formation of a thin layer of resin. This is particularly effective in the configuration using the rectangular conductor having a relatively large number of .
- the resin portion (40) includes the lead wire portion (23) and the power wire portion ( 30) includes an immersed resin portion (40) formed by being immersed in a resin material.
- the lead wire lead portion (23d) and the power wire lead portion (33) are replaced by the immersed resin portion (40). It is provided so as to be pulled out from a common surface (resin side end surface (41)). In this case, the lead wire portion (23) and the power wire portion (30) are likely to be arranged relatively close to each other in the submerged resin portion (40).
- Preventing the formation of a thin layer of resin by having at least one of the portions of the wire portion (30) include the lead-out portion spacing portion (34) is important for the lead wire portion (23) and the power wire portion (30). ) are particularly effective in the configuration using the above-described immersed resin portion (40) in which the immersion resin portion (40) is likely to be arranged relatively close to each other.
- the coil (20) includes a plurality of in-phase lead wire portions (230) in which a plurality of in-phase lead wire portions (23) are arranged adjacent to each other in the circumferential direction. It is configured to be provided for each phase.
- the power line portion (30) corresponding to each of the plurality of phases is joined to the end portion side portion (23a) of each of the plurality of lead wire portions (23) of the corresponding in-phase lead wire portion (230).
- the in-phase lead wire portion (230), the plurality of joint portions (31), and the lead portion separation portion (34) are integrally covered with a common resin portion (40).
- a common resin portion (40) corresponding to each of the plurality of phases protrudes radially outward from the stator core (10) and is formed integrally with each other on concentric circles.
- the common resin portion (40) corresponding to each of the plurality of phases protrudes radially outward from the stator core (10) and is formed integrally with each other on concentric circles.
- the mechanical strength (rigidity) of the resin portion (40) can be improved, and resistance to heat stress of the resin portion (40) and stress during assembly can be improved.
- the drawn-out portion separating portion (34) is arranged to extend in the circumferential direction when viewed from the axial direction, and the power line portion ( 30) is provided so as to extend in a direction approaching the terminal fixing portion (30a) arranged at the end portion opposite to the joint portion (31).
- the length of the power line portion (30) can be shortened, so that the natural frequency of the power line portion (30) can be increased.
- the vibration resistance of the power line portion (30) can be improved.
- the power line lead-out portion (33) is arranged at the end opposite to the joint portion (31) of the power line portion (30) when viewed from the axial direction.
- a line segment ( ⁇ ) connecting the center (O) of the hole (30b) provided in the terminal fixing portion (30a) and into which the external terminal is inserted and the power line lead-out portion (33). is provided in With this configuration, it is possible to prevent stress from being concentrated (stress is dispersed) in the resin portion (40) adjacent to the corner of the power line lead-out portion (33). As a result, the resin portion (40) adjacent to the corner of the power line lead-out portion (33) can be prevented from cracking due to assembly stress, vibration stress, thermal expansion (contraction) stress, and the like. .
- the power line portion (30) is arranged such that the position of the joint portion (31) is shifted toward the lead wire portion (23) with respect to the position of the opposing portion (32). formed.
- the power line portion ( 30) can be prevented from interfering with each other, the power line portion (30) can be easily brought into surface contact with the lead wire portion (23). As a result, the position of the power line portion (30) can be stably fixed.
- the present invention is similar to this. is not limited to A portion of the lead wire portion 23 between the end portion side portion 23a and the lead wire drawing portion 23d may include an offset portion. Both the power line portion and the lead wire portion may include an offset portion.
- the lead wire portion 23 extends axially in the immersed resin portion 40 (resin portion), and the end side portion 23a of the lead wire portion 23 and the facing portion 32 of the power line portion 30 are diametrically arranged.
- the lead wire portion 23 is provided so as to extend radially in the submerged resin portion 40, and the end portion side portion 23a of the lead wire portion 23 and the facing portion 32 of the power line portion 30 face each other in the axial direction. It may be provided as follows.
- the first portion 34a of the offset portion 34 (separating portion of the drawer portion) is provided so as to extend in the circumferential direction, but the present invention is not limited to this.
- the first portion 34a may be provided so as to extend radially.
- the lead wire lead-out portion 23d and the power wire lead-out portion 33 are drawn out from the submerged resin portion 40 (resin portion) while being spaced apart in the radial direction.
- the lead wire lead-out portion 23d and the power wire lead-out portion 33 are separated by a distance (L1, L2) equal to or greater than the width W2 of the lead wire portion 23 in the circumferential direction.
- the invention is not limited to this.
- the distance (L1, L2) between the lead wire lead-out portion 23d and the power wire lead-out portion 33 is the width W1 of the gap C1 between the end side portion 23a of the lead wire portion 23 and the opposing portion 32 of the power wire portion 30. may be smaller than the width W2 of the lead wire portion 23 in the circumferential direction.
- the lead wire lead-out portion 23d and the power line lead-out portion 33 are separated in the circumferential direction by a distance (L11, L12) equal to or greater than the width W2 of the lead wire portion 23 in the circumferential direction.
- the distance (L11, L12) between the lead wire lead-out portion 23d and the power wire lead-out portion 33 in the circumferential direction is the distance between the end portion side portion 23a of the lead wire portion 23 and the opposing portion 32 of the power wire portion 30 in the circumferential direction.
- the width W1 of the gap C1 between them is larger than the maximum value, it may be smaller than the width W2 of the lead wire portion 23 in the circumferential direction.
- the axial thickness t of the portion 42 between the first portion 34a of the offset portion 34 and the resin-side end surface 41 is equal to or greater than the width W2 of the lead wire portion 23 in the circumferential direction.
- the present invention is not limited to this. If the thickness t of the portion 42 in the axial direction is greater than the maximum value of the width W1 of the gap C1 between the end side portion 23a of the lead wire portion 23 and the facing portion 32 of the power line portion 30, the lead wire portion 23 may be smaller than the width W2 in the circumferential direction.
- each of the lead wire portion 23 and the power line portion 30 is formed of a rectangular conductor, but the present invention is not limited to this.
- Each of lead wire portion 23 and power wire portion 30 may be formed of a round conductor having a circular cross section.
- the resin portion includes the immersed resin portion
- the present invention is not limited to this. If the resin portion is provided so as to cover the lead wire portion 23 and the power wire portion 30, the lead wire portion 23 and the power wire portion 30 are formed by a method other than immersing the lead wire portion 23 and the power wire portion 30 in a resin material (for example, injection molding). may be formed.
- a resin material for example, injection molding
- the offset portions 34 (first portions 34a) extending from the facing portions 32 facing the two lead wire portions 23 of the same phase extend in the same direction from the respective facing portions 32.
- the offset portions 34 may extend in opposite directions from the respective facing portions 32 .
- the power line lead-out portion 33 (the second portion 34b of the offset portion 34) is arranged in the central portion of the two lead wire portions 23 in the circumferential direction.
- stator core 10a end surface 13 slot 20 coil 21 slot accommodating portion 22 coil end portion 23 lead wire portion 23a end portion side portion 23d lead wire drawing portion 30 power line portion 30a terminal fixing portion 30b hole portion 31 joint portion 32 facing portion 33 power line Drawer part 34 Offset part (drawer part separation part) 34a first portion 34b second portion 34c end portion 40 immersed resin portion (resin portion) 100 Stator 230 In-phase lead wire portion C1 Gap L1, L2 Distance (the distance between the lead wire lead-out portion and the power wire lead-out portion) L11, L12 distance (the distance between the lead wire outlet and the power wire outlet in the circumferential direction) O center ⁇ line segment
Abstract
Description
図1~図6を参照して、本実施形態によるステータ100の構造について説明する。なお、以下の説明では、ステータ100が備えるステータコア10(図1参照)の軸方向、径方向および周方向を、それぞれ、Z方向、R方向およびC方向とする。また、軸方向(Z方向)の一方側および他方側を、それぞれ、Z1側およびZ2側とする。また、径方向(R方向)の内側および外側を、それぞれ、R1側およびR2側とする。
本実施形態では、以下のような効果を得ることができる。
なお、今回開示された実施形態は、すべての点で例示であって制限的なものではないと考えられるべきである。本発明の範囲は、上記した実施形態の説明ではなく請求の範囲によって示され、さらに請求の範囲と均等の意味および範囲内でのすべての変更(変形例)が含まれる。
10a 端面
13 スロット
20 コイル
21 スロット収容部
22 コイルエンド部
23 リード線部
23a 端部側部分
23d リード線引出部
30 動力線部
30a 端子固定部
30b 孔部
31 接合部分
32 対向部分
33 動力線引出部
34 オフセット部(引出部離間部)
34a 第1部分
34b 第2部分
34c 端部
40 浸漬樹脂部(樹脂部)
100 ステータ
230 同相リード線部
C1 隙間
L1、L2 距離(リード線引出部と動力線引出部とが離間する距離)
L11、L12 距離(リード線引出部と動力線引出部とが周方向に離間する距離)
O 中心
α 線分
Claims (8)
- スロットを含むステータコアと、
前記スロットに収容されるスロット収容部と、前記ステータコアの軸方向における端面から突出するコイルエンド部と、外部からの電力が供給されるリード線部と、を含むコイルと、
前記リード線部の端部側部分と接合する接合部分と、前記接合部分と連続して配置され、前記端部側部分との間に隙間が設けられるように前記端部側部分と隣り合うように設けられる対向部分とを含み、前記外部からの電力を前記コイルに供給する動力線部と、
前記リード線部および前記動力線部を覆うように設けられる樹脂部と、を備え、
前記リード線部および前記動力線部は、それぞれ、前記樹脂部から引き出されるリード線引出部および動力線引出部を含み、
前記端部側部分と前記リード線引出部との間の前記リード線部の部分、および、前記対向部分と前記動力線引出部との間の前記動力線部の部分のうち少なくとも一方は、前記リード線引出部および前記動力線引出部を、前記端部側部分と前記対向部分とが対向する方向における前記隙間の幅の最大値よりも大きい距離だけ離間した状態で前記樹脂部から引き出すための引出部離間部を含む、ステータ。 - 前記引出部離間部は、前記リード線部には設けられずに、前記動力線部において、前記対向部分および前記動力線引出部に接続されている、請求項1に記載のステータ。
- 前記リード線部は、前記樹脂部内において前記軸方向に延びるように設けられており、
前記リード線部の前記端部側部分と前記動力線部の前記対向部分とは、径方向に対向するように設けられており、
前記引出部離間部は、前記対向部分から周方向に沿って延びるように設けられる第1部分と、前記第1部分の前記対向部分とは反対側の端部から前記軸方向に延びるとともに前記動力線引出部に接続される第2部分と、を有するオフセット部を含む、請求項2に記載のステータ。 - 前記リード線引出部および前記動力線引出部は、前記オフセット部の前記第1部分により前記周方向の位置がずらされて配置されていることによって、前記周方向において、前記リード線部の前記周方向における幅以上の距離だけ離間している、請求項3に記載のステータ。
- 前記コイルは、互いに同相の複数の前記リード線部が周方向に隣り合って配置される同相リード線部が、複数の相ごとに設けられるように構成されており、
前記複数の相の各々に対応する前記動力線部は、対応する前記同相リード線部の前記複数のリード線部の各々の前記端部側部分と接合する複数の前記接合部分と、前記複数の接合部分の各々と連続して配置される複数の前記対向部分と、前記複数の対向部分と前記動力線引出部とを接続する前記引出部離間部と、を含み、
前記複数の相の各々において、前記同相リード線部、前記複数の接合部分、および、前記引出部離間部は、共通の前記樹脂部により一体的に覆われており、かつ、前記複数の相の各々に対応する前記共通の樹脂部は、前記ステータコアの径方向外側に突出するとともに互いに同心円周上に一体的に形成されている、請求項1~4のいずれか1項に記載のステータ。 - 前記引出部離間部は、前記軸方向から見て、周方向に延びるように配置されているとともに、前記対向部分から、前記動力線部の前記接合部分とは反対側の端部に配置される端子固定部に接近する方向に延びるように設けられている、請求項1~5のいずれか1項に記載のステータ。
- 前記動力線引出部は、前記軸方向から見て、前記動力線部の前記接合部分とは反対側の端部に配置される端子固定部に設けられ、外部端子が挿入される孔部の中心と、前記動力線引出部とを結ぶ線分に対して、直交するように設けられている、請求項1~6のいずれか1項に記載のステータ。
- 前記動力線部は、前記接合部分の位置が前記対向部分の位置に対して前記リード線部側にずらされるように形成されている、請求項1~7のいずれか1項に記載のステータ。
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JP2015156754A (ja) * | 2014-02-20 | 2015-08-27 | 日本精工株式会社 | ブラシレスモータおよび電動パワーステアリング装置 |
JP2016019420A (ja) * | 2014-07-10 | 2016-02-01 | Kyb株式会社 | バスバーユニット及びこれを備えた回転電機 |
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JP2019068494A (ja) | 2017-09-28 | 2019-04-25 | トヨタ自動車株式会社 | 回転電機ステータ、及び、その製造方法 |
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JP5902726B2 (ja) | 2014-01-15 | 2016-04-13 | トヨタ自動車株式会社 | 回転電機ステータ |
WO2016158062A1 (ja) | 2015-03-31 | 2016-10-06 | アイシン・エィ・ダブリュ株式会社 | ステータ |
WO2018164120A1 (ja) | 2017-03-06 | 2018-09-13 | 本田技研工業株式会社 | 給電体、および回転電機 |
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JP2010233327A (ja) * | 2009-03-26 | 2010-10-14 | Mitsuba Corp | ブラシレスモータ |
US20160380522A1 (en) * | 2011-08-10 | 2016-12-29 | Lg Innotek Co., Ltd. | Stator and EPS Motor Having the Same |
JP2015156754A (ja) * | 2014-02-20 | 2015-08-27 | 日本精工株式会社 | ブラシレスモータおよび電動パワーステアリング装置 |
JP2016019420A (ja) * | 2014-07-10 | 2016-02-01 | Kyb株式会社 | バスバーユニット及びこれを備えた回転電機 |
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US20240146140A1 (en) | 2024-05-02 |
JP2022148905A (ja) | 2022-10-06 |
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