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WO2017158700A1 - Machine électrique tournante et procédé de production de machine électrique tournante - Google Patents

Machine électrique tournante et procédé de production de machine électrique tournante Download PDF

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Publication number
WO2017158700A1
WO2017158700A1 PCT/JP2016/058036 JP2016058036W WO2017158700A1 WO 2017158700 A1 WO2017158700 A1 WO 2017158700A1 JP 2016058036 W JP2016058036 W JP 2016058036W WO 2017158700 A1 WO2017158700 A1 WO 2017158700A1
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WO
WIPO (PCT)
Prior art keywords
coil
stator
slot
core
electrical machine
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2016/058036
Other languages
English (en)
Japanese (ja)
Inventor
野中　剛
省吾 牧野
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yaskawa Electric Corp
Original Assignee
Yaskawa Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Yaskawa Electric Corp filed Critical Yaskawa Electric Corp
Priority to CN201680083537.6A priority Critical patent/CN108781006B/zh
Priority to PCT/JP2016/058036 priority patent/WO2017158700A1/fr
Priority to JP2018505087A priority patent/JP6660606B2/ja
Publication of WO2017158700A1 publication Critical patent/WO2017158700A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/06—Embedding prefabricated windings in the machines
    • H02K15/062—Windings in slots; Salient pole windings
    • H02K15/065—Windings consisting of complete sections, e.g. coils or waves
    • H02K15/066—Windings consisting of complete sections, e.g. coils or waves inserted perpendicularly to the axis of the slots or inter-polar channels
    • 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
    • H02K1/14—Stator cores with salient poles
    • H02K1/146—Stator cores with salient poles consisting of a generally annular yoke with salient poles
    • H02K1/148—Sectional cores
    • 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
    • H02K1/165—Shape, form or location of the slots
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
    • H02K3/28—Layout of windings or of connections between windings

Definitions

  • the disclosed embodiment relates to a rotating electrical machine and a method for manufacturing the rotating electrical machine.
  • a stator core is configured by arranging a plurality of divided core elements in the circumferential direction, and each of the plurality of coils has one slot in the circumferential direction on one slot.
  • the rotating electrical machine is described in which the other side portion in the circumferential direction is accommodated in another slot different from the one slot, and the circumferential positions of the coils are sequentially shifted and overlapped.
  • the stator iron core has an open slot structure for the convenience of assembly, and there are problems in terms of cogging and quietness.
  • a segment type coil is used to form a fully closed slot structure, connection of the coil side is required, which increases the size and cost and makes it difficult to ensure reliability. There was a problem.
  • the present invention has been made in view of such problems, and provides a rotating electric machine and a method for manufacturing the rotating electric machine that can realize a fully closed slot structure stator core without using a segment type coil.
  • the purpose is to do.
  • an annular first stator core having a first slot portion is connected to an outer peripheral surface of the first stator core, and is connected to a rotation axis.
  • a second stator core including a plurality of core pieces arranged in a circumferential direction and having a second slot portion between the adjacent core pieces; the first slot portion and the second slot portion being the rotation shaft;
  • a rotating electrical machine having a plurality of stator coils housed in a plurality of slots configured to communicate in the radial direction with respect to the core is applied.
  • the first coil side portions of the plurality of stator coils are respectively attached to the plurality of first slot portions formed on the outer peripheral surface of the annular first stator core.
  • a plurality of core pieces are inserted into the cores of the plurality of stator coils, respectively, connected to the outer peripheral surface of the first stator core, and the core pieces adjacent in the circumferential direction around the rotation axis are
  • the second coil side portions of the plurality of stator coils are accommodated in the second slot portions formed therebetween, and the end portions of the plurality of stator coils are connected to form a predetermined connection pattern.
  • a highly efficient and quiet rotating electric machine can be realized by making the stator core have a fully closed slot structure.
  • FIG. 2 is a transverse sectional view taken along the line II-II in FIG. It is the figure which looked at the stator core only in the axial direction side surface. It is a perspective view showing an example of composition of a stator coil.
  • FIG. 5 is a transverse sectional view taken along the line VV in FIG. 1. It is explanatory drawing which shows an example of the state which inserts the 1st coil side part in an inner side slot part.
  • FIG. 1 It is a schematic diagram for demonstrating an example of the connection pattern of a stator coil. It is a longitudinal cross-sectional view showing an example of the whole structure of the rotary electric machine of 2nd Embodiment. It is a perspective view showing an example of the structure of a coil end cover. It is a cross-sectional view which shows an example of the structure where an iron core piece has a recessed part and a convex part in the circumferential direction side surface.
  • the rotating electrical machine 1 is used as a motor or a generator. As shown in FIGS. 1 and 2, the rotating electrical machine 1 includes a rotor 2 having a shaft 21, a stator 3, a frame 4, a load side bracket 5, a load side bearing 6, and an antiload side bracket. 8 and the anti-load side bearing 9.
  • the direction along the rotational axis AX of the shaft 21 (rotor 2) (the left-right direction in FIG. 1) is “axial direction”, and the radial direction centered on the rotational axis AX is “radial direction”.
  • the direction along the circumference centered on the rotation axis AX is referred to as the “circumferential direction”.
  • the “load side” refers to the side on which the load is attached to the rotating electrical machine 1, that is, the side from which the shaft 21 protrudes in this example (the right side in FIG. 1). Means the side opposite to the load side (left side in FIG. 1).
  • the frame 4 (an example of a housing) has a substantially cylindrical shape, and the stator 3 is fixed to the inner peripheral portion 4a.
  • the load side bracket 5 (an example of a housing) is provided at the load side end of the frame 4.
  • the anti-load side bracket 8 (an example of a housing) is provided at the anti-load side end of the frame 4.
  • the anti-load side bracket 8 and the frame 4 and the load side bracket 5 are fixed to each other by bolts (not shown).
  • the load side bearing 6 is provided on the load side bracket 5.
  • the anti-load side bearing 9 is provided on the anti-load side bracket 8.
  • the shaft 21 is supported by the load side bearing 6 and the anti-load side bearing 9 so as to be rotatable around the rotation axis AX.
  • a hole is formed in the end of the shaft 21 on the side opposite to the load by boring or the like, and a rotational position detector 22 for detecting the rotational position of the rotor 2 is provided therein.
  • the rotor 2 includes a shaft 21, a substantially cylindrical rotor core 24 having an inner peripheral portion 23, and a plurality (8 poles in this example) embedded in the rotor core 24 for each pole. Permanent magnet 25.
  • the shaft 21 is fitted to the inner peripheral portion 23 of the rotor core 24.
  • the stator 3 is fixed to the inner peripheral portion 4a of the frame 4 so as to surround the radially outer side of the rotor core 24 with a magnetic gap.
  • the stator 3 includes a substantially annular stator core 32 in which a plurality (48 in this example) of slots 31 are arranged over the entire circumference, and a two-layer overlapping winding method (so-called distributed winding method).
  • a plurality of (48 in this example) stator coils 41 housed in one form; The detailed configuration of the stator 3 will be described later.
  • connection portion 45 that connects the ends of the plurality of stator coils 41 so as to have a predetermined connection pattern is disposed on the radially outer side of the second coil end portion 53 on the side opposite to the load of the stator coil 41. .
  • the structure of the rotary electric machine 1 is not limited to the example shown in FIG.1 and FIG.2.
  • the permanent magnets 25 may be radially arranged on the rotor core 24, or the permanent magnets 25 may be fixed to the outer peripheral surface of the rotor core 24.
  • the rotating electrical machine 1 may be a slot combination other than the 8-pole 48-slot shown in FIG.
  • FIG. 3 shows a view of only the stator core 32 as viewed from the side in the axial direction.
  • the stator core 32 has a double ring structure that is coaxially divided in the radial direction.
  • the outer stator core 32b located on the outer peripheral side has a plurality (48 in this example) of core pieces 33 (also referred to as divided cores) arranged along the entire circumference in the circumferential direction along the inner peripheral portion 4a of the frame 4. By being connected in this way, the whole is formed in an annular shape.
  • stator core 32 when viewed as a whole of the stator core 32, a substantially cylindrical shape in which a plurality of core pieces 33 are connected to the outer peripheral surface of a substantially cylindrical inner stator core 32 a (an example of a first stator core) on the inner peripheral side.
  • the outer stator core 32b (an example of the second stator core) is arranged so as to cover the outer stator core 32b.
  • the inner stator core 32a includes a substantially annular inner peripheral portion 34 disposed on the inner peripheral side, and a plurality of substantially rectangular (disclosed) radially disposed from the outer peripheral surface of the inner peripheral portion 34 radially outward.
  • the inner teeth portion 35 of 48 is provided.
  • the inner peripheral portion 34 and the plurality of inner teeth portions 35 are integrally formed.
  • the interval between the inner teeth portions 35 adjacent to each other in the circumferential direction is constant, and this interval portion forms an inner slot portion 36 (an example of a first slot portion).
  • Each iron core piece 33 is provided in the same number as the inner teeth portion 35.
  • each iron core piece 33 has a substantially T-shaped radial cross-sectional shape, and has a substantially rectangular radial cross-sectional shape radially inward.
  • the outer teeth part 37 is provided.
  • An outer slot portion 38 (an example of a second slot portion) is formed between the outer teeth portions 37, 37 of the iron core pieces 33, 33 adjacent in the circumferential direction.
  • the circumferential dimensions of each of the inner teeth 35 and each of the outer teeth 37 are substantially equal along the radial direction in this example.
  • a concave portion 35 a is formed at the outer peripheral end portion of each inner tooth portion 35, and a convex portion 37 a is formed at the inner peripheral end portion of each outer tooth portion 37.
  • Each core piece 33 is connected to the inner stator core 32a by the convex portion 37a of the outer tooth portion 37 being accommodated in the concave portion 35a of the inner tooth portion 35. Thereby, a pair of corresponding inner teeth part 35 and outer teeth part 37 are connected in the radial direction to form one tooth part 39.
  • the corresponding inner slot portion 36 and outer slot portion 38 communicate with each other in the radial direction, and the entirety thereof forms a so-called fully closed type slot 31 that is not opened in either the radial direction or the circumferential direction.
  • each slot 31 is formed so as to have a substantially trapezoidal radial cross-sectional shape in which the circumferential dimension gradually decreases inward in the radial direction.
  • FIGS. 2, 4, and 5 the upper side corresponds to the load side, and the lower side corresponds to the anti-load side.
  • FIGS. 2 and 5 the front side of the paper corresponds to the anti-load side, and the back side of the paper corresponds to the load side. 2 and 5, for convenience of explanation, only one stator coil 41 is illustrated with a coil end portion described later.
  • Each stator coil 41 is a coil whose outer shape is formed into a predetermined shape by pressure molding.
  • the stator coil 41 is originally formed by winding a conducting wire 42 that is a round wire having a substantially circular cross section.
  • the conducting wire 42 is composed of, for example, a round enameled wire covered with an appropriate fusion film.
  • each stator coil 41 has an outer shape such as that shown in FIG. 4 or the like and is formed in the center by winding the lead wire 42 a plurality of times, for example, in a substantially rectangular frame shape, and pressing each part. It is formed as an air core coil having a core portion 43.
  • the stator coil 41 may be formed of a conducting wire having a shape other than the conducting wire 42 (a flat wire or the like).
  • each stator coil 41 includes a first coil side part 50, a second coil side part 51, a first coil end part 52, and a second coil end part 53.
  • the first coil side 50 extends along the axial direction and is accommodated in the inner slot 36 of one slot 31.
  • the first coil side 50 is pressure-molded so as to have a predetermined shape.
  • the conducting wire 42 is laminated in the radial direction and the circumferential direction.
  • the first coil side 50 is pressure-formed in the radial direction and the circumferential direction so as to correspond to the cross-sectional shape of the inner slot portion 36 of the slot 31, so that the circumferential dimension is inward in the radial direction. It has a substantially trapezoidal cross-sectional shape that narrows toward the surface.
  • the second coil side 51 extends along the axial direction at a position separated from the first coil side 50 by a predetermined distance X (see FIG. 2), and is different from the one slot 31 (in this example)
  • the outer slots 38 are accommodated in the other slots 31 (six spaced apart in the circumferential direction). That is, the number N of slots 31 between the one slot 31 in which the first coil side 50 is accommodated and the other slot 31 in which the second coil side 51 is accommodated is 4 in this example. It is. Therefore, the so-called “slot jump number” of the stator coil 41 indicated by N + 2 is 6 in this example.
  • N + 2 M
  • the plurality of stator coils 41 is N + 2 (6 in this example).
  • the first coil end portions 52 and the second coil end portions 53 are accommodated in the plurality of slots 31 so as to overlap in the radial direction with their circumferential positions shifted sequentially (see FIG. 5).
  • the second coil side 51 is pressure-formed so as to have a predetermined shape. As shown in FIG. 2, in the 2nd coil side part 51, the conducting wire 42 is laminated
  • the second coil side portion 51 is pressure-formed in the radial direction and the circumferential direction so as to correspond to the cross-sectional shape of the outer slot portion 38 of the slot 31, so that the circumferential dimension is inward in the radial direction. It has a substantially trapezoidal cross-sectional shape that narrows toward the surface (the radial dimension is smaller than the first coil side 50 and the circumferential dimension is larger).
  • the inner slot portion 36 of each slot 31 accommodates the first coil side portion 50 of one stator coil 41, and the outer slot portion 38 is connected to the inner slot portion 36 of the slot 31 that is separated by six in the circumferential direction.
  • a second coil side 51 of another stator coil 41 in which the first coil side 50 is accommodated is accommodated.
  • the separation distance L (see FIG. 4) between the coil side portions 50 and 51 of each stator coil 41 is the same as that of the inner slot portion 36 of the slot 31 separated in the circumferential direction by six. It is substantially equal to the separation distance X (see FIG. 2) with the outer slot portion 38.
  • the outer peripheral diameter do of the first coil side portion 50 with respect to the rotation axis AX of the rotor 2 in the state where the stator coil 41 is mounted on the stator core 32 is the rotation of the rotor 2. It is less than or equal to the inner peripheral diameter di of the second coil side 51 with respect to the axis AX. That is, in a state where the stator coil 41 is mounted on the stator core 32, the storage ranges of the first coil side portions 50 and the second coil side portions 51 are arranged so as not to be closely or overlapping in the radial direction. ing.
  • the space factor of the stator coil 41 (coil side portions 50 and 51) in each slot 31 is, for example, 85% or more.
  • the first coil end portion 52 extends so as to connect between the load side end portions of the coil side portions 50 and 51 at a portion of the stator coil 41 that is dislocated to the load side from the slot 31 of the stator core 32. (See FIG. 4).
  • the first coil end portion 52 is pressure-molded so as to have a predetermined shape. That is, the first coil end portion 52 includes a first extending portion 52 a extending in the axial direction from the load side end portion of the first coil side portion 50 and an axial direction from the load side end portion of the second coil side portion 51.
  • the third extending portion 52c is pressure-formed in the radial direction and the axial direction, and the end surface on the load side is a flat portion 52d.
  • the 2nd extension part 52b is pressure-molded by radial direction, The end surface of the radial direction outer side is the flat part 52e.
  • the first coil end portion 52 is disposed such that the flat portions 52 d and 52 e are in contact with the load side bracket 5 via a resin or an insulating sheet (not shown).
  • the second coil end portion 53 connects between the opposite end portions of the coil side portions 50 and 51 in the portion of the stator coil 41 that is further away from the slot 31 of the stator core 32 toward the opposite load side. (See FIG. 4).
  • the second coil end portion 53 is pressure-molded so as to have a predetermined shape. That is, the second coil end portion 53 includes a first extending portion 53 a that extends in the axial direction from the opposite end portion of the first coil side portion 50 and a shaft from the opposite end portion of the second coil side portion 51.
  • a second extending portion 53b extending in the direction, and a third arc connecting the opposite end portions of the first extending portion 53a and the second extending portion 53b in a substantially arc shape along the separation distance X.
  • the third extending portion 53c is pressure-molded in the radial direction and the axial direction, and the end surface on the side opposite to the load is a flat portion 53d.
  • the 2nd extension part 53b is pressure-molded by radial direction, The end surface of the radial direction outer side is the flat part 53e.
  • the second coil end portion 53 is disposed such that the flat portion 53 d comes into contact with the anti-load side bracket 8 via a resin or an insulating sheet (not shown).
  • both the winding start side end portion 54 and the winding end side end portion 55 of the conducting wire 42 are drawn out from the vicinity of the radially outer end portion of the second coil end portion 53.
  • the connecting portion 45 is arranged radially outward of the annular coil end group composed of the plurality of second coil end portions 53 arranged in the circumferential direction at the portion opposite to the load side from the stator core 32. Is easy to arrange.
  • the stator coil 41 configured as described above is arranged in a two-layer wrapping manner with respect to the plurality of slots 31 provided in the stator core 32. That is, as shown in FIG. 4, the stator coil 41 in which the first coil side portion 50 is accommodated in the inner slot portion 36 of one slot 31, and the second coil side portion in the outer slot portion 38 of the other slot 31. 51 is stored. In other words, the first coil sides 50 and the second coil sides 51 of the different stator coils 41 in the same slot 31 are arranged so as to be adjacent in the radial direction.
  • each stator coil 41 The coil end portions 52 and 53 of each stator coil 41 are arranged in a two-layer wrapping manner in the form of being laminated and pressure-molded as described above, so that the load side portion and the anti-load are positioned more than the stator core 32.
  • the space factor of the coil end parts 52 and 53 in each of the side parts is, for example, 80% or more.
  • the configuration / arrangement of the stator coil 41 described above is merely an example, and a configuration / arrangement other than the above may be used.
  • the space factor of the stator coil 41 in each slot 31 may be less than 85%, and the coil end portions 52 and 53 in each of the load side portion and the anti-load side portion from the stator core 32 may be different.
  • the space factor may be less than 80%.
  • the protruding positions of the end portions 54 and 55 of each stator coil 41 may be positions other than those described above.
  • the plurality of stator coils 41 are arranged in a two-layered manner with respect to the plurality of fully-closed slots 31 included in the stator core 32. Is provided.
  • the slot 31 of the integrated stator core 32 is a fully closed type, the operation of forming the stator coil 41 by winding the conductive wire 42 as a coil wire around each of the teeth portions 39 in the connected state is as follows. Very complicated and unrealistic.
  • stator coils 41 that are preliminarily formed in the above-described configuration are assembled to the inner stator core 32a with the outer stator core 32b (the plurality of core pieces 33) removed. Then, the stator 3 is assembled by sequentially connecting the plurality of iron core pieces 33.
  • FIG. 6 is an enlarged view of the outer peripheral portion of the inner stator core 32a viewed from the axial side surface. As shown in FIG. 6, the first coil side 50 of the stator coil 41 is inserted into the inner slot 36 and assembled in the radial direction. The assembly operation of the stator coil 41 is performed for all the inner slot portions 36 (see FIG. 9 described later).
  • the stator coil 41 is assembled to the inner stator core 32a. I can't do that. This is because the inner teeth 35 and the inner slots 36 extend radially about the rotation axis AX, and the distance between adjacent inner teeth 35 (the circumferential direction of the inner slots 36 increases toward the outer side in the radial direction). This is due to the expansion of the width.
  • stator coil 41 including the coil end portions 52 and 53 including the coil end portions 52 and 53 whose outer shape is fixed (not easily deformed) by pressure molding is used, It cannot be deformed so as to widen the distance L between the two coil sides 51 (see FIG. 3). For this reason, even if the first coil side 50 can be inserted into the inner slot 36 first, the second coil side 51 that is opposed to the radially inner end of the inner slot 36 is inserted in the middle. It interferes with the inner teeth portion 35, and the entire stator coil 41 cannot be mounted on the inner stator core 32a like the stator coil 41S in the figure.
  • the radial dimension A of the inner slot portion 36 is smaller than the radial dimension B of the first coil side portion 50.
  • the second coil side portion 51 facing in the middle thereof is The inner teeth portion 35 is not interfered with and can be mounted in a normal arrangement. This is because the outer peripheral diameter do of the first coil side 50 with respect to the rotational axis AX is equal to or smaller than the inner peripheral diameter di of the second coil side 51 in a state where the stator coil 41 is normally mounted as described above. This is because the inner teeth portion 35 is within the range of the inner peripheral diameter di (see FIG. 4).
  • the radial dimension of the first coil side 50 and the radial dimension of the second coil side 51 are determined. It is desirable that the total is the same as the radial dimension of the entire slot 31. Therefore, as described above, the outer slot portion 38 (outer teeth portion 35) corresponds to the fact that the radial dimension A of the inner slot portion 36 (inner teeth portion 35) is smaller than the radial dimension B of the first coil side portion 50. The radial dimension of 37) is set to be larger than the radial dimension of the second coil side 51.
  • stator coil 41 With the stator coil 41 assembled to all the inner slot portions 36 in this way, the outer teeth portion 37 of the iron core piece 33 is inserted into the air core portion 43 of the stator coil 41 as shown in FIG.
  • the stator 3 is assembled by being connected to the inner teeth portion 35 in the radial direction while being done.
  • the core pieces 33 are connected to each other in the circumferential direction, and the outer slot portion 38 and the inner slot portion 36 between the adjacent core pieces 33 communicate with each other in the radial direction to form the slots 31 therein.
  • the 1 coil side part 50 and the 2nd coil side part 51 are arrange
  • the conducting wire 42 that is the conducting wire of the stator coil 41 is set on a jig (not shown). And the conducting wire 42 is wound in a substantially rectangular frame shape a plurality of times, for example, and a wound body (not shown) is formed. At this time, the conducting wire 42 is wound so that the shape of the wound body is substantially the same as the completed shape of the stator coil 41 (see FIG. 4). And after each corner
  • the first coil sides 50 of the stator coil 41 are accommodated in all the inner slots 36 of the inner stator core 32a to which the core pieces 33 are not connected, and all the stators are stored in the inner stator core 32a.
  • a coil 41 is disposed (see FIG. 6).
  • the core piece 33 is assembled
  • the second coil side 51 of each stator coil 41 is accommodated in the outer slot 38, and each stator coil 41 is arranged in the above-described two-layer lap winding method (see FIG. 9).
  • the stator coil 41 and the stator core 32 may be integrally molded with a mold resin.
  • the end portions 54 and 55 of the plurality of stator coils 41 are connected by the connection portion 45 in a connection pattern as shown in FIG. 11, for example, and the stator 3 is completed.
  • “# 1” to “# 48” are the numbers of the slots 31, and the stator coil 41 is composed of three coils (U, V, W) as a whole.
  • U bar in the figure, "U” is underlined) "" V “" V bar (in the figure, “V” is underlined) "" W “” W bar (in the figure “W” is underlined) ”is the phase of the stator coil 41.
  • the U-phase stator coil 41 has a thick line
  • the V-phase stator coil 41 has a thin line
  • the W-phase stator coil 41 has an intermediate thickness between the thick line and the thin line.
  • Each is indicated by a line.
  • the current input from the U phase is at the neutral point (N), and the ⁇ ( ⁇ apex side in FIG. It corresponds to the arrowhead side of
  • the manufactured stator 3 is attached to the load side bracket 5.
  • the flat portions 52d and 52e of the first coil end portion 52 of each stator coil 41 come into contact with the load side bracket 5 via a resin or an insulating sheet.
  • the frame 4 is attached to the load side bracket 5 so that the outer periphery of the stator 3 may be covered.
  • the shaft 21, the rotor 2, and the like are inserted and fixed inside the stator core 32.
  • the anti-load side bracket 8 is attached to the end of the frame 5 on the anti-load side.
  • the flat portion 53d of the second coil end portion 53 of each stator coil 41 contacts the anti-load side bracket 8 via a resin or an insulating sheet. Thereby, the rotary electric machine 1 is completed.
  • the manufacturing method of the rotary electric machine 1 demonstrated above is an example to the last, and the manufacturing method of the rotary electric machine 1 is not necessarily time-sequential not to mention the process performed in time series along the order demonstrated above. Even if it is not executed, the process includes steps executed in parallel or individually. Even in the process executed in time series, the order can be appropriately changed depending on circumstances.
  • the rotating electrical machine 1 of the present embodiment is connected to the annular inner stator core 32a having the inner slot portion 36 and the outer peripheral surface of the inner stator core 32a, and is arranged in the circumferential direction.
  • the outer stator core 32b including the outer slot portion 38 between the adjacent core pieces 33, and the inner slot portion 36 and the outer slot portion 38 are configured to communicate with each other in the radial direction.
  • Such a rotating electrical machine 1 can be manufactured as follows.
  • the first coil side 50 of the stator coil 41 is sequentially attached to the inner slot portion 36 formed in the inner stator core 32 a, and then the core pieces 33 are sequentially attached to the air core portion 43 of the stator coil 41.
  • the second coil side 51 of the stator coil 41 is sequentially accommodated in the outer slot 38 formed between the core pieces 33 adjacent in the circumferential direction while being inserted and sequentially connected to the outer peripheral surface of the inner stator core 32a. To do. Thereby, an annular stator coil 41 which is not a segment type can be used, and a fully closed slot structure can be formed by the annular inner stator core 32a. Therefore, the highly efficient and silent rotating electrical machine 1 can be realized.
  • the radial dimension A of the inner slot portion 36 is smaller than the radial dimension B of the first coil side portion 50 to be accommodated (see FIG. 8).
  • the radial dimension of the outer slot portion 38 (outer tooth portion 37) is larger than the radial dimension of the second coil side portion 51 to be accommodated.
  • the outer stator core 32 b has the same number of core pieces 33 as the slots 31. Since the number of the iron core pieces 33 is the same as the number of the slots 31, each iron core piece 33 is configured to have a single tooth (outer teeth portion 37). Thereby, an electromagnetic characteristic can be improved compared with the case where the iron core piece 33 is provided with a plurality of teeth. Moreover, since it becomes easy to insert the iron core piece 33 in the air core part 43 of the stator coil 41 during the assembly work, the work efficiency can be improved.
  • the inner stator core 32a has the same number of recesses 35a as the core pieces 33 on the outer peripheral surface, and the core pieces 33 have protrusions 37a accommodated in the recesses 35a.
  • the protrusion 37a of the core piece 33 can be connected by being inserted into the recess 35a of the inner stator core 32a, so that the connecting and positioning work of the core piece 33 is facilitated and the work efficiency is improved. it can.
  • the first coil side portions 50 of the plurality of stator coils 41 are respectively attached to the plurality of inner slot portions 36 formed on the outer peripheral surface of the annular inner stator core 32a.
  • a plurality of core pieces 33 are inserted into the cores 43 of the stator coils 41 and connected to the outer peripheral surface of the inner stator core 32a, and formed between the core pieces 33 adjacent to each other in the circumferential direction.
  • the step of accommodating the second coil sides 51 of the plurality of stator coils 41 in the outer slot 38 and the end portions 54 and 55 of the plurality of stator coils 41 form a predetermined connection pattern (see FIG. 11). In this way, the wire is connected by a manufacturing method.
  • an annular stator coil 41 which is not a segment type can be used, and a fully closed slot structure can be formed by the annular inner stator core 32a. Therefore, the highly efficient and silent rotating electrical machine 1 can be realized.
  • the first coil side 50, the second coil side 51, and the coil end portions 52 and 53 of the stator coil 41 are added so as to have a predetermined shape.
  • a step of pressure forming thereby, since the space factor of the stator coil 41 can be improved and winding resistance can be reduced, the highly efficient rotary electric machine 1 is realizable.
  • each coil end portion 52 and 53 of the stator coil 41 When the coil end portions 52 and 53 of the stator coil 41 are brought into direct contact with the load side bracket 5 or the anti-load side bracket 8 as in the first embodiment, each coil end portion is caused by a dimensional tolerance or the like. It is difficult to make 52 and 53 and each bracket 5 and 8 contact
  • the rotating electrical machine 100 includes a load side coil end cover 107 and an anti-load side coil end cover 110.
  • the load side coil end cover 107 (corresponding to an example of a cover member) is disposed between the load side bracket 105 and the frame 104 and the first coil end portion 52 of the stator coil 41.
  • the load side coil end cover 107 covers at least a part of the first coil end portion 52, in this example, the load side end portion and the radially outer end portion.
  • the load side coil end cover 107 is disposed so as to contact the flat portions 52d and 52e (see FIG. 1) of the first coil end portion 52 on the inner side in the axial direction and the radial direction.
  • the load side coil end cover 107 is in contact with the load side bracket 105 and the frame 104 on the outside in the axial direction and the radial direction.
  • the anti-load side coil end cover 110 (corresponding to an example of a cover member) is disposed between the anti-load side bracket 108 and the frame 104 and the anti-load side coil end portion 53 of the stator coil 41.
  • the anti-load side coil end cover 110 covers at least a part of the second coil end portion 53, in this example, the anti-load side end portion and the radially outer end portion. Further, the anti-load side coil end cover 110 is disposed so as to contact the flat portions 53d and 53e (see FIG. 1) of the second coil end portion 53 on the inner side in the axial direction and the radial direction.
  • the anti-load side coil end cover 110 is in contact with the anti-load side bracket 108 and the frame 104 on the outer side in the axial direction and the radial direction.
  • the load-side coil end cover 107 has a disc portion 107A having a substantially constant plate thickness and a cylindrical portion 107B.
  • the surface on the non-load side of the disc portion 107A is in contact with the axially outer surface (flat portion 52d) of the first coil end portion 52.
  • the load side surface of the disc portion 107 ⁇ / b> A contacts the inner wall surface of the load side bracket 105.
  • the inner peripheral surface of the cylindrical portion 107B is in contact with the radially outer surface (flat portion 52e) of the first coil end portion 52.
  • the outer peripheral surface 107 b of the cylindrical portion 107 B is in contact with the load side bracket 105 and the inner peripheral surface of the frame 104.
  • the anti-load side coil end cover 110 has the same configuration as that of the load side coil end cover 107 and will not be described.
  • the material of the load side coil end cover 107 and the anti-load side coil end cover 110 is not particularly limited, but may be made of a metal such as aluminum.
  • an insulating film (an anodic oxide film or the like) is formed on at least the surface facing (contacting) the coil end portions 52 and 53.
  • the insulating film may be formed so as to cover at least a part of the inner peripheral surface 107a and the outer peripheral surface 107b of the coil end covers 107 and 110. Thereby, it becomes easy to secure the creeping distance between the coil end portions 52 and 53 and the coil end covers 107 and 110.
  • the coil end covers 107 and 110 may be made of ceramic or resin as an insulator. In this case, a resin whose thermal conductivity is improved by adding a filler such as carbon nanotube may be used.
  • a cooling flow path 104b through which cooling water (or oil) is passed is formed inside the frame 104. Since the other configuration of the rotating electrical machine 100 is the same as that of the rotating electrical machine 1 described above, the description thereof is omitted.
  • the rotating electrical machine 100 according to the second embodiment described above includes the coil end covers 107 and 110. Since the coil end covers 107 and 110 can be designed independently according to the shapes of the coil end portions 52 and 53 and the frame 104 and the brackets 105 and 108, the frame 104 and the brackets 105 and 108 and the coil end portions can be freely designed. 52 and 53 can be closely adhered to each other. Therefore, the heat of the stator coil 41 can be efficiently transferred to the frame 104 and the brackets 105 and 108 via the coil end covers 107 and 110, so that heat dissipation can be improved.
  • the coil end covers 107 and 110 are made of an insulating material, or an insulating film is provided on the coil end covers 107 and 110, whereby insulation can be ensured regardless of whether the film of the stator coil 41 is damaged. Furthermore, even if the coil specifications are changed, it can be dealt with only by changing the coil end covers 107 and 110, and the frame 104 and the brackets 105 and 108 can be made common, so that the cost can be reduced.
  • the coil end covers 107 and 110 are brought into contact with the flat portions 52d, 52e, 53d and 53e of the coil end portions 52 and 53, whereby the coil end covers 107 and 110 and the stator coil 41 are electrically connected. Since the contact area with 42 can be increased, the heat dissipation can be further improved. Moreover, such coil end parts 52 and 53 are obtained by press-molding the stator coil 41 so as to have a predetermined shape. Therefore, since the space factor of the stator coil 41 can be improved and the winding resistance can be reduced, a highly efficient rotating electrical machine 100 can be realized.
  • a flat portion can be formed in addition to the flat portions 52d, 52e, 53d, 53e by forming the coil end portions 52, 53 under pressure.
  • flat portions can be formed at the radially inner ends of the first extending portions 52a and 53a.
  • the coil end covers 107 and 110 may have a shape that can contact these flat portions.
  • the plurality of core pieces 33 constituting the outer stator core 32b have a recess 135a on one circumferential side and a projection 137a on the other circumferential side. Also good.
  • the plurality of core pieces 33 are connected in the circumferential direction by fitting the concave portions 135a and the convex portions 137a. In this case, the radial positioning is ensured between the iron core pieces 33, the connection strength of the entire stator iron core 32 is improved, and the assembling work is facilitated.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacture Of Motors, Generators (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Windings For Motors And Generators (AREA)

Abstract

Le problème décrit par la présente invention est d'obtenir une machine électrique tournante extrêmement efficace et silencieuse. La solution selon l'invention porte sur un noyau de fer de stator 32 d'une machine électrique tournante 1 qui comprend : un noyau de fer de stator interne annulaire 32a pourvu de sections de fente internes 36; un noyau de fer de stator externe 32b relié à une surface périphérique externe du noyau de fer de stator interne 32a, pourvu d'une pluralité de pièces de noyau de fer 33 agencées dans la direction circonférentielle, et pourvu de sections de fente externes 38 entre les pièces de noyau de fer 33 adjacentes; et une pluralité de bobines de stator 41 logées dans une pluralité de fentes 31 constituées par les sections de fente internes 36 et les sections de fente externes 38 s'interconnectant dans la direction radiale.
PCT/JP2016/058036 2016-03-14 2016-03-14 Machine électrique tournante et procédé de production de machine électrique tournante Ceased WO2017158700A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN201680083537.6A CN108781006B (zh) 2016-03-14 2016-03-14 旋转电机、旋转电机的制造方法
PCT/JP2016/058036 WO2017158700A1 (fr) 2016-03-14 2016-03-14 Machine électrique tournante et procédé de production de machine électrique tournante
JP2018505087A JP6660606B2 (ja) 2016-03-14 2016-03-14 回転電機、回転電機の製造方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2016/058036 WO2017158700A1 (fr) 2016-03-14 2016-03-14 Machine électrique tournante et procédé de production de machine électrique tournante

Publications (1)

Publication Number Publication Date
WO2017158700A1 true WO2017158700A1 (fr) 2017-09-21

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JP (1) JP6660606B2 (fr)
CN (1) CN108781006B (fr)
WO (1) WO2017158700A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20210069807A (ko) * 2019-12-04 2021-06-14 현대모비스 주식회사 헤어핀 권선모터의 고정자 어셈블리 및 이의 제조방법
EP4468564A3 (fr) * 2023-05-23 2025-04-02 Hyundai Mobis Co., Ltd. Stator de moteur de type fendu et son procédé de fabrication

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPWO2021020479A1 (fr) * 2019-07-30 2021-02-04

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004320824A (ja) * 2003-04-10 2004-11-11 Honda Motor Co Ltd ステータコア
JP2012170299A (ja) * 2011-02-16 2012-09-06 Toyota Motor Corp モータの冷却装置
JP2014131427A (ja) * 2012-12-28 2014-07-10 Top:Kk 回転機
JP2015220878A (ja) * 2014-05-19 2015-12-07 三菱電機株式会社 回転電機の固定子、固定子コア、及び固定子の製造方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004320824A (ja) * 2003-04-10 2004-11-11 Honda Motor Co Ltd ステータコア
JP2012170299A (ja) * 2011-02-16 2012-09-06 Toyota Motor Corp モータの冷却装置
JP2014131427A (ja) * 2012-12-28 2014-07-10 Top:Kk 回転機
JP2015220878A (ja) * 2014-05-19 2015-12-07 三菱電機株式会社 回転電機の固定子、固定子コア、及び固定子の製造方法

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20210069807A (ko) * 2019-12-04 2021-06-14 현대모비스 주식회사 헤어핀 권선모터의 고정자 어셈블리 및 이의 제조방법
KR102343403B1 (ko) * 2019-12-04 2021-12-27 현대모비스 주식회사 헤어핀 권선모터의 고정자 어셈블리 및 이의 제조방법
EP4468564A3 (fr) * 2023-05-23 2025-04-02 Hyundai Mobis Co., Ltd. Stator de moteur de type fendu et son procédé de fabrication

Also Published As

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JPWO2017158700A1 (ja) 2018-10-11
CN108781006B (zh) 2020-09-01
CN108781006A (zh) 2018-11-09
JP6660606B2 (ja) 2020-03-11

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