WO2019146499A1 - 回転電機の固定子及び回転電機の固定子の製造方法 - Google Patents

回転電機の固定子及び回転電機の固定子の製造方法 Download PDF

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Publication number
WO2019146499A1
WO2019146499A1 PCT/JP2019/001321 JP2019001321W WO2019146499A1 WO 2019146499 A1 WO2019146499 A1 WO 2019146499A1 JP 2019001321 W JP2019001321 W JP 2019001321W WO 2019146499 A1 WO2019146499 A1 WO 2019146499A1
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WO
WIPO (PCT)
Prior art keywords
core
divided
stator
split
slots
Prior art date
Application number
PCT/JP2019/001321
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English (en)
French (fr)
Japanese (ja)
Inventor
川村　浩司
直弘 本石
長谷川　和哉
康宏 早坂
尚俊 増田
伊藤　克也
Original Assignee
三菱電機株式会社
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 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to JP2019567029A priority Critical patent/JP6843272B2/ja
Priority to CN201980007603.5A priority patent/CN111630752B/zh
Publication of WO2019146499A1 publication Critical patent/WO2019146499A1/ja

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    • 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
    • H02K1/20—Stationary parts of the magnetic circuit with channels or ducts for flow of cooling medium
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies

Definitions

  • the present invention relates to a stator of a rotating electrical machine and a method of manufacturing the stator of the rotating electrical machine.
  • the plurality of coil end portions do not interfere with each other. For this reason, the coil end portion has to be long in the axial direction of the rotating electrical machine. Therefore, in the coil end portion, a method in which the stator coil is configured by a plurality of divided coils is used as a method for achieving both the prevention of interference and the shortening of the axial length.
  • a gap is required between the inner wall of the slot and the split coil in order to assemble the split coil by inserting the split coil into the slot of the stator core.
  • a stator adopting a split coil there is such a gap, and there is a problem that the thermal conductivity between the split coil and the stator core becomes low.
  • FIG. 1 In the rotating electrical machine described in Patent Document 1, the stator coil is configured of a plurality of U-shaped divided coils. The split coil inserted into the slot is pressed against the inner wall of the slot by the elastic force of the split coil to increase the thermal conductivity.
  • the present invention has been made to solve the above-mentioned problems, and is a stator of a rotating electrical machine which can be easily assembled and can ensure good thermal conductivity between a stator coil and a stator core, and
  • An object of the present invention is to provide a method of manufacturing a stator of a rotating electrical machine.
  • the stator of the rotating electrical machine according to the present invention is accommodated in an annular stator core, in which a plurality of slots extending in the central axis direction are arranged in the circumferential direction, and in the plurality of slots, from the circumferential dimensions of the plurality of slots ,
  • a stator coil having a small circumferential dimension, the stator core having three or more core segments coaxially arranged in contact with each other, and three or more core segments having a circumferential direction of the slot A first divided core group constituted by two or more divided iron cores whose positions coincide with each other, and a second divided iron core group constituted by one or more divided iron cores whose circumferential positions of the slots coincide with each other; , And at least one of the divided cores constituting the second divided core group is disposed between the divided cores constituting the first divided core group, and divided into the second divided core group.
  • the position is displaced by a fixed amount in a first direction in the circumferential direction with respect to the circumferential direction position of the slots of the split iron cores constituting the first split core group, and the stator coil is provided in each of the plurality of slots It is in contact with the inner wall in the first direction of the circumferential direction of the slots of the split core forming the first split core group and the inner wall in the second direction of the circumferential direction of the slots of the split core forming the second split core group.
  • At least one core segment of the core segments constituting the second core segment group is arranged between core segments constituting the first core segment group.
  • the circumferential position of the slots of the split iron cores constituting the second split core group is constant in a first direction in the circumferential direction with respect to the circumferential position of the slots of the split iron cores constituting the first split core group It is displaced.
  • the stator coil in each of the plurality of slots, is divided into an inner wall in a first direction in the circumferential direction of the slots of the divided iron cores constituting the first divided iron core group and a second divided iron core group It is in contact with the inner wall in the second direction in the circumferential direction of the slot of the iron core. Therefore, the stator coil of the rotary electric machine according to the present invention can be easily assembled, and can ensure good thermal conductivity between the stator coil and the stator core.
  • FIG. 1 It is sectional drawing which shows the rotary electric machine by Embodiment 1 of this invention. It is a top view which shows the axial direction end surface of a stator core. It is a principal part top view which shows a part of axial direction end surface of a stator core. It is a perspective view which shows a part of stator core. It is an enlarged view of the connection part of a stator core. It is a side view of a U-shaped coil. It is a principal part top view of a stator core in the state where an insulating material was inserted. It is a top view of a stator in the state where a coil and insulating material are inserted in a slot.
  • FIG. 1 is a cross-sectional view of a rotating electrical machine according to a first embodiment of the present invention.
  • the rotating electric machine comprises a frame 1, a stator 2 and a rotor 3.
  • the axial direction of the central axis of the stator 2 is referred to as “axial direction”.
  • the circumferential direction and radial direction regarding the central axis of the stator 2 are described as "circumferential direction” and "radial direction", respectively.
  • the frame 1 has a frame main body 11 having a cylindrical portion and a bottom portion closing the opening of one of the cylindrical portions, and an end plate 12 closing the opening of the frame main body 11. At the bottom of the frame body 11 and the end plate 12, bearings 13 for rotatably holding the rotor 3 are provided.
  • the frame body 11 is hollow inside and is formed of metal. Specifically, the material is iron or aluminum.
  • the frame body 11 accommodates the stator 2 and the rotor 3 therein.
  • the frame 1 plays a role as a transfer path of heat generated in the stator 2 in addition to the role of holding the components housed inside.
  • the rotor 3 has a rotation shaft 31 located at the center of the rotor 3, a rotor core 32 fitted and fixed to the outer diameter portion of the rotation shaft 31, and a rotation fixed to the outer peripheral surface of the rotor core 32 A child magnet 33 is provided.
  • the rotating shaft 31 is a rod-like member having a circular cross section in which a plurality of diameter portions are formed.
  • the rotor 3 is rotatably supported by two bearings 13.
  • the rotating shaft 31 is formed in a stepped shape in which the diameter of the portion in which the rotor core 32 is fitted and the portion in which the bearing 13 is fitted is different.
  • the portion fitted to the bearing 13 is smaller in diameter than the portion fitted to the rotor core 32.
  • the rotating shaft 31 is formed of metal.
  • the rotor core 32 is cylindrical, and a hollow portion in which the rotation shaft 31 is fitted is provided at the center.
  • a plurality of rotor magnets 33 are arranged at equal angular pitches in the circumferential direction on the outer peripheral surface of the cylindrical rotor core 32.
  • the rotor magnet 33 is a permanent magnet.
  • the rotor 3 in which the rotor magnet 33, the rotor core 32, and the rotating shaft 31 are integrally formed is rotated by the action of magnetic force when a current flows through the stator coil 25.
  • the rotor 3 may be a form, cage or claw pole type rotor in which permanent magnets are embedded in the rotor core 32.
  • the stator 2 has an annular stator core 20 and a stator coil 25.
  • the stator 2 is inserted into and fixed to the inside of the cylindrical portion of the frame main body 11 by press fitting, shrink fitting, or the like.
  • FIG. 2 is a top view showing an axial end face of the stator core
  • FIG. 4 is a perspective view showing a part of the stator core 20 before the stator coil is inserted.
  • the stator core 20 is composed of three divided cores 22.
  • the divided core 22 includes a first divided core 22 a and a second divided core 22 b which are different in the shape of the ridge portion 222 at the tip of the tooth 221. Specifically, as shown in FIG.
  • the stator core 20 includes two first split iron cores 22 a and one second split iron core 22 b in the axial direction of the first split iron cores 22 a and the second split iron cores. 22b, the first split iron cores 22a are arranged in contact with each other and coaxially arranged in this order.
  • the first split iron core 22a and the second split iron core 22b are distinguished by subscripts a and b. When collectively referring to components, only reference numerals are used.
  • the first divided core 22a is a laminated core configured by laminating only a plurality of first core pieces 23a.
  • the second split iron core 22b is a laminated iron core configured by laminating only a plurality of second iron core pieces 23b.
  • the first split iron core 22a and the second split iron core 22b respectively have an annular back yoke 220, and a plurality of annular back yokes 220 each extending from the back yoke 220 toward the center of the back yoke 220 and arranged at an equal pitch in the circumferential direction. And a tooth 221.
  • the back yoke 220 is in contact with the inner wall of the cylindrical portion of the frame body 11 over the entire outer peripheral surface.
  • Each tooth 221 is formed such that the width in the circumferential direction is narrowed toward the inner circumferential side, and a ridge portion 222 protruding to both sides in the circumferential direction is formed at the tip end portion.
  • the ridges 222 of the adjacent teeth 221 have a gap and are not in contact with each other.
  • Slots 223 extending in a direction parallel to the central axis of stator core 20 are formed by teeth 221 adjacent to each other in the circumferential direction.
  • the stator coil 25 is inserted into the slot 223.
  • the first divided iron core group 21a is configured by the two first divided iron cores 22a.
  • the 2nd divided core group 21b is comprised by one 2nd divided core 22b.
  • the circumferential positions of the slots 223 of the first divided core 22a and the second divided core 22b coincide. .
  • the circumferential position of the flange portion 222 of the second core segment 22b is displaced in the second direction with respect to the circumferential position of the flange portion 222 of the first core segment 22a.
  • the left side in FIG. 4 is the first circumferential direction, and the right side is the second circumferential direction.
  • the second divided core 22b is rotated with respect to the first divided core 22a.
  • a holding mechanism 28 is provided to the first split iron core 22 a and the second split iron core 22 b.
  • the second divided core 22b can be easily rotated to the second position with respect to the first divided core 22a.
  • the first split iron core 22a and the second split iron core 22b can be fixed in the second position.
  • the holding mechanism 28 includes a connecting portion 224 provided on the back yoke 220 and a connected portion 225 formed on the connecting portion 224.
  • the holding mechanism 28 further includes a connecting member 226, which is not shown.
  • the connecting member 226 is inserted into the connected portion 225 as described later.
  • the connecting portion 224 is a portion formed by extending the back yoke 220 outward in the radial direction on the outer peripheral portion of the back yoke 220.
  • FIG. 2 shows split iron cores 22 in which connected portions 225 are provided at three locations in the circumferential direction.
  • the coupled portion 225 is a coupling hole into which the coupling member 226 is inserted.
  • the first split iron core 22 a and the second split iron core 22 b are slightly different in the shape of the collar portion 222, and are also different in the shapes of the connecting portion 224 and the connected portion 225. That is, the first core piece 23a and the second core piece 23b are different in the shape of the buttocks equivalent portion, the connection portion equivalent portion, and the connected portion equivalent portion.
  • the first core piece 23a and the second core piece 23b are configured in the same manner except that the shapes of the buttocks equivalent portion, the connection portion equivalent portion, and the connected portion equivalent portion are different.
  • FIG. 3 is a top view of an essential part showing a part of the axial end face of the stator core 20 before the stator coil 25 is inserted.
  • the first split iron core 22a is shown by a solid line.
  • the second split iron core 22b is shown by a broken line.
  • the flange portion 222 of the first divided core 22 a is located on the left side with respect to the circumferential center of the teeth 221 as viewed from the axial direction, that is, in a first direction.
  • the ridge portion 222 of the second split iron core 22b is located on the right side with respect to the circumferential center of the teeth 221 as viewed in the axial direction, that is, in the second direction.
  • the amount of protrusion in the first direction of the circumferential direction of the ridge portion 222 is larger than the amount of protrusion in the second direction of the circumferential direction of the ridge portion 222 .
  • the amount of protrusion in the second direction in the circumferential direction of the ridge portion 222 is larger than the amount of protrusion in the first direction in the circumferential direction of the ridge portion 222.
  • the first core piece 23a and the second core piece 23b are respectively punched out of a magnetic steel sheet which is a magnetic thin plate.
  • the first core piece 23a and the second core piece 23b are provided with a plurality of uneven fitting portions in which the core pieces are fitted to each other.
  • a convex portion is provided on the surface facing in the first axial direction
  • a concave portion is provided on the surface facing the second axial direction It is done.
  • the convex portion and the concave portion are provided at the same circumferential position and the same radial position.
  • the concavo-convex portions are configured to be fitted to each other, and the first core pieces 23a are fitted and fixed to each other.
  • the concavo-convex portions are configured to fit with each other, and the second core pieces 23b are fitted and fixed to each other.
  • the recess and the protrusion provided on the first core piece 23a and the second core piece 23b are simultaneously provided when punching out the first core piece 23a and the second core piece 23b from the magnetic steel sheet.
  • a plurality of recesses and projections are provided in each of the first core piece 23a and the second core piece 23b, and the first core pieces 23a and the second core pieces 23b are firmly fixed to each other.
  • the fixation between the first core pieces 23a and between the second core pieces 23b may be welding or bonding.
  • the first core piece 23a constituting the first split core 22a has a concave portion and a convex portion except for the first core piece 23a disposed at the end in the first direction of the axial direction of the first split core 22a. It is provided. Although the first core piece 23a arranged at the end of the first divided core 22a in the first direction of the axial direction has a recess in the surface in contact with the first core piece 23a stacked adjacently, The convex part is not provided in the field which is an end face of the 1st division core 22a.
  • the second core piece 23b constituting the second split core 22b has a recess and a convex except for the second core piece 23b disposed at the end in the second direction of the axial direction of the second split core 22b.
  • the second core piece 23b arranged at the end in the second direction of the axial direction of the second split core 22b is provided with a recess on the surface in contact with the second core piece 23b stacked adjacently
  • the convex part is not provided in the field which is an end face of the 2nd division iron core 22b. Thereby, the opposing end faces of the adjacent split iron cores 22 can be in surface contact without interference by the convex portions. Therefore, division
  • FIG. 5 is an enlarged view of a connecting portion of the stator core 20.
  • the connecting portion of the first split iron core 22a is set to 224a, and the connected portion is set to 225a.
  • the connecting portion of the second split iron core 22b is set to 224b, and the connected portion is set to 225b.
  • the connecting portion 224a and the connected portion 225a provided on the first split iron core 22a The connection part 224b and the to-be-connected part 225b which were provided in the split iron core 22b are displaced to the 2nd direction of the circumferential direction. That is, when the first split iron core 22a and the second split iron core 22b are stacked so that the slots 223 coincide with each other, the connecting portion 224a and the connecting portion 225a of the first split iron core 22a are displaced in the left direction in FIG. And is shown by a solid line. The connecting portion 224 b and the connected portion 225 b of the second core segment 22 b are displaced to the right in FIG. 5 and are indicated by broken lines.
  • the stator coil 25 is composed of a plurality of U-shaped coils 26.
  • the stator coil 25 generates a magnetic field that causes the rotor 3 to rotate when current flows.
  • FIG. 6 is a side view of the U-shaped coil 26. As shown in FIG.
  • the coil 26 has two straight portions 261 and a connecting portion 262 connecting the two straight portions 261.
  • the coil 26 is formed of, for example, a linear conductor such as a copper wire, an aluminum wire or the like, which is covered with enamel and coated.
  • the connection portion 262 is located on the axially outer side of the stator core 20 to form a coil end portion.
  • the coil 26 is inserted into each slot 223 of the stator core 20.
  • the two straight portions 261 of the U-shaped coil 26 are inserted into a pair of slots 223 arranged across one or more slots 223.
  • four straight portions 261 are inserted in each slot 223.
  • the circumferential dimension of the slot 223 is larger than the circumferential dimension of the linear portion 261 of the coil 26. Therefore, a gap is secured between the coil 26 and the inner wall in the circumferential direction of the slot 223. Therefore, it is possible to easily insert the coil 26 into the slot 223.
  • the coil 26 to be connected is connected with the end of the coil 26 to form a coil for each phase.
  • the stator 2 has an insulating material 27 in addition to the stator core 20 and the stator coil 25.
  • FIG. 7 is a top view of relevant parts of the stator core 20 with the insulating material 27 inserted therein.
  • the insulating material 27 is fitted in each slot 223.
  • the material of the insulating material 27 includes polyimide (PI), polyethylene terephthalate (PET), polyphenylene sulfide (PPS), and the like.
  • the insulating material 27 is preferably formed of a material having excellent electrical insulation and thermal conductivity.
  • the insulating material 27 electrically insulates between the stator core 20 and the stator coil 25.
  • the overlapping portion 27 a when the insulating material 27 is inserted into the slot 223 is disposed on the bottom side of the slot 223.
  • the overlapping portion 27 a may be disposed on the opening side of the slot 223.
  • the circumferential dimension of the straight portion 261 includes the thickness of the insulating material 27.
  • the circumferential dimension of the slot 223 is larger than the circumferential dimension of the linear portion 261
  • the circumferential dimension of the slot 223 is the circumferential dimension of the linear portion 261 plus twice the thickness of the insulating material 27 Means greater.
  • a plurality of first iron core pieces 23a and second iron core pieces 23b are respectively stacked to produce a first divided iron core 22a and a second divided iron core 22b.
  • the first split iron cores 22a and the second split iron cores 22b are arranged alternately in contact with each other with the central axes of the first split iron cores 22a and the second split iron cores 22b aligned.
  • the two first split iron cores 22a constitute a first split iron core group 21a.
  • one second divided core 22 b constitutes a second divided core group 21 b.
  • the first position is a circumferential position of each of the first divided core 22 a and the second divided core 22 b when the stator coil 25 is inserted into each slot 223.
  • the first position is the position of the first split iron core 22a and the second split iron core 22b at which the circumferential positions of the slots 223 in all the split iron cores 22 coincide.
  • FIG. 8 is a top view of the stator 2 in a state in which the coil 26 and the insulating material 27 are inserted into the slot 223. In the figure, the coil 26 is shown in cross section.
  • FIG. 9 is a cross-sectional view of the stator 2 located at the first position. Since the circumferential positions of the slots 223 coincide with each other, and the circumferential dimension of the slots is larger than the circumferential dimension of the linear portions 261, the linear portions 261 of the coil 26 should interfere with the slots 223. Can be inserted easily.
  • core segments 22 are rotated.
  • the first divided core group 21a constituting the divided core 22 is fixed, and the second divided core group 21b is rotated about the central axis of the divided core 22 by a fixed amount, so that the rotational angular position of the divided core 22 is Two positions.
  • the second position is a position where the split core 22 is in the assembled state. Specifically, from the first position where the circumferential positions of all the slots 223 of the first divided core group 21a and the second divided core group 21b coincide with each other, only the second divided core group 21b is used. Is a position displaced by a fixed amount in the first direction in the circumferential direction.
  • the inner wall in the first direction in the circumferential direction of all the slots 223 of the first divided core group 21a is in contact with the side surface facing the first direction in the circumferential direction of the linear portion 261 of the coil 26 .
  • the inner wall in the second direction in the circumferential direction of all the slots 223 of the second core segment group 21b is in contact with the side surface facing the second direction in the circumferential direction of the linear portion 261 of the coil 26.
  • the second divided core group 21a is fixed.
  • the core groups 21b are rotated by a fixed amount in the circumferential direction.
  • the ridge portions 222 displaced by a fixed amount in the circumferential direction are displaced due to the difference in the shapes of the ridge portions 222 of the first core piece 23a and the second core piece 23b. It is rotated in the circumferential direction so as to reduce the amount, that is, the amount of deviation.
  • the shape of the collar portion 22 is designed so as to be magnetically ideal in a state where the amount of displacement of the collar portion 222 is reduced by rotation.
  • difference between the ridge parts 222 is lose
  • the coils 26 inserted in the slots 223 are alternately pressed from both sides in the circumferential direction by the inner walls of the slots 223 of the first divided core 22 a and the second divided core 22 b by the rotation of the divided cores 22.
  • the connecting member 226 is inserted into each of the connected portions 225.
  • the connecting member 226 is inserted into all the connected portions 225 of the three core segments 22 arranged axially continuously.
  • the connecting member 226 is inserted, the second divided core 22b rotates to the second position with respect to the first divided core 22a.
  • 10 and 11 are cross-sectional views showing the state before and after inserting the connecting member 226 into the connected portion 225, respectively.
  • the connecting member 226 is a pin having a circular cross section having an outer diameter that fits with the inner diameter of the connected portion 225 without play.
  • the connecting member 226 has a length equal to or greater than the axial length of the stator core 20 composed of three divided iron cores 22 arranged continuously in the axial direction.
  • the connecting member 226 is tapered so that the connecting member 226 can be easily inserted into the connected portion 225.
  • FIG. 12 is a top view of the stator core 20 in the second position.
  • the first split iron core 22a is shown by a solid line.
  • the second split iron core 22b is shown by a broken line.
  • the circumferential position of the slot 223 of the second core segment 22b is displaced with respect to the slot 223 of the first core segment 22a. Therefore, the inner wall in the first direction of the circumferential direction of the slot 223 of the stator core 20 and the inner wall in the second direction are in an uneven state in the axial direction.
  • each of the first divided core 22a or the second divided core 22b rotates.
  • the circumferential positions of all the slots 223 coincide.
  • the circumferential position of the slot 223 of the second divided core 22b relative to the first divided core 22a is displaced by a fixed amount.
  • FIG. 13 is a cross-sectional view of the stator core 20 in the second position.
  • the inner wall 223a in the first direction in the circumferential direction of the slots 223 of the stator core 20 and the inner wall 223b in the second direction are in an uneven state in the axial direction. Therefore, the inner wall 223a in the first direction in the circumferential direction of the slot 223 of the first split core 22a contacts the side surface 261a facing the first direction in the circumferential direction of the linear portion 261 of the coil 26 through the insulating material 27. ing.
  • the inner wall 223b in the second direction in the circumferential direction of the slot 223 of the second core segment 22b contacts the side surface 261b facing the second direction in the circumferential direction of the linear portion 261 of the coil 26 via the insulating material 27. ing.
  • FIG. 14 is a perspective view showing the stator core 20 in the second position. In the second position, circumferential positions of the ridge portions 222 of the teeth of the first split iron core 22a and the teeth of the second split iron core 22b all coincide with each other.
  • FIG. 15 is a top view of the stator core 20 in the second position.
  • FIG. 16 is a cross-sectional view of the stator core 20 at the second position. The dimension between the inner wall 223a in the first direction in the circumferential direction of the slot 223 of the first split core 22a and the inner wall 223b in the second direction in the circumferential direction of the slot 223 of the second split core 22b is shown in the figure. It is indicated by X. The dimension X is narrower than the slot dimension formed in each split core 22.
  • the number of core segments 22 arranged in the axial direction is preferably three or more.
  • a first split iron core 22a there are three, a first split iron core 22a, a second split iron core 22b, and a first split iron core 22a.
  • the second divided iron core 22b, the first divided iron core 22a, and the second divided iron core 22b may be used.
  • the number of each of the first split iron core 22a and the second split iron core 22b may be selected to be three or more in total, but in any case, one or more of the first split iron cores 22a
  • the divided core groups 21a are configured, and one or more second divided cores 22b configure a second divided core group 21b.
  • FIG. 17 is a cross-sectional view of a comparative example in which two split iron cores 22 are arranged in the axial direction.
  • the two arranged case is a case where one first divided core 22a and one second divided core 22b are arranged in the axial direction.
  • the stator core 20B when the stator core 20B is positioned at the second position, the coils 26 inserted in the slots 223 become oblique. As a result, the side surfaces of the coil 26 do not come in surface contact with the inner wall of the slot 223, resulting in point contact, and good thermal conductivity can not be obtained.
  • the position of the end of the coil 26 is displaced, which causes a problem in connection between the coils 26.
  • stator core 20 includes two first split iron cores 22a and one second split iron core 22b as first split iron core 22a, second split iron core 22b, and first split iron core 22a. In order, it mutually contacts and is coaxially arranged and comprised.
  • the circumferential positions of the slots 223 of the two first core segments 22a coincide with each other. In the second position, the circumferential position of the slot 223 of the second core segment 22b is displaced by a fixed amount in the first circumferential direction with respect to the circumferential position of the slot 223 of the first core segment 22a.
  • the linear portions 261 of the coils 26 housed in the respective slots 223 are the first circumferential wall of the slots 223 of the first core segment 22a, and the second circumferential core of the slots 223 of the second core segment 22b. It is in contact with the inner wall 223 b in two directions via the insulating material 27 housed in the slot 223. Thereby, good thermal conductivity between the stator coil 25 and the stator core 20 is ensured. Further, since the coil 26 and the stator core 20 are in contact with each other through the insulating material 27 at a plurality of locations in the slot 223, the natural frequency of the coil 26 and the stator core 20 is increased. This makes it difficult to amplify the magnetic vibration generated at the time of driving, and the magnetic noise of the rotating electrical machine is reduced.
  • connection part 225 is formed. Therefore, by inserting the connecting member 226 into the connected portion 225, the first split iron core 22a and the second split iron core 22b coaxially arranged can be positioned and fixed at the second position. At this time, since the tip of the connecting member 226 is formed in a tapered shape, the connecting member 226 is inserted into the connected portion 225 of the first divided core 22a and the second divided core 22b located at the first position.
  • the first split iron core 22a and the second split iron core 22b can be displaced from the first position to the second position.
  • the first core piece 23a and the second core piece 23b have burrs due to being punched out of the magnetic thin plate. Since the insulating material 27 is accommodated in the slot 223, the occurrence of damage to the insulating coating of the coil 26 due to the burrs of the first core piece 23a and the second core piece 23b is suppressed.
  • the two first split iron cores 22 a and one second split iron core 22 b are brought into contact with each other with the circumferential positions of the slots 223 aligned.
  • the split iron cores 22a, the second split iron cores 22b, and the first split iron cores 22a are coaxially arranged in this order.
  • the coil 26 is inserted into each of the slots 223.
  • the second split iron core 22b is displaced in the first circumferential direction with respect to the first split iron core 22a.
  • the inner wall 223a in the first direction of the circumferential direction of the slot 223 of the first split core 22a and the inner wall 223b in the second direction of the circumferential direction of the slot 223 of the second split core 22b are interposed via the insulating material 27.
  • the linear portion 261 of the coil 26 is pressed.
  • the coil 26 can be easily accommodated in the slot 223 without causing the bending of the coil 26 and damage to the insulating coating. Therefore, the stator 2 in which good thermal conductivity between the stator coil 25 and the stator core 20 is secured can be easily assembled.
  • the three connecting members 226 inserted into the three connected portions 225 are separated into one by one, the three connecting members 226 are integrally connected by the annular member. May be Thereby, the three connection members 226 can be simultaneously inserted into the three connected portions 225, and the assembly time of the stator 2 can be shortened.
  • connection member 226 is comprised with the pin, you may comprise the connection member 226 with a volt
  • the three split iron cores 22 can be integrally fixed by fastening the nut to the screw portion of the connection member 226 protruding from the connected portion 225.
  • the second embodiment is configured in the same manner as the first embodiment except that a linear coil is used instead of the U-shaped coil 26.
  • the number of linear portions 261 of the coil 26 accommodated in the slot 223 is an even number. That is, in the first embodiment, the odd number of straight portions 261 can not be accommodated.
  • the number of coils accommodated in the slot 223 can be arbitrarily set regardless of odd number and even number.
  • the number of turns of the phase coil of the stator coil can be set arbitrarily.
  • both a U-shaped coil and a linear coil may be used.
  • the first core pieces 23a are stacked to produce the first split core 22a, and the second core pieces 23b are stacked to produce the second split core 22b.
  • the first divided core 22a and the second divided core 22b are manufactured using only the first core piece 23a. That is, the first core pieces 23a are stacked with the first surface of the first core piece 23a facing up to produce the first divided core 22a.
  • the first core piece 23a is stacked with the second surface opposite to the first surface of the first core piece 23a up, and the second divided core 22b is manufactured.
  • the stator core 20 is manufactured by stacking the first split iron core 22a, the second split iron core 22b, and the first split iron core 22a in this order.
  • the convex portion for fitting and fixing the first core pieces 23a to each other is not formed on the contact surface between the first split iron core 22a and the second split iron core 22b. Further, a U-shaped coil 26 is accommodated in the stator core 20.
  • the first split iron core 22a and the second split iron core 22b are configured using only the first core piece 23a, as in the first embodiment except that the first split core 22a and the second split iron core 22b are configured. It is configured.
  • the same effect as that of the first embodiment can be obtained.
  • the iron core pieces 23 are only one type of the first iron core pieces 23a, only one type of die can be used to punch out the iron core pieces 23, thereby achieving cost reduction.
  • the first split iron core 22a and the second split iron core 22b are manufactured using only the first core piece 23a, but the first split iron core is only using the second core piece 23b. 22a and the second split iron core 22b may be produced. Further, although only the U-shaped coil 26 is used in the third embodiment, only a linear coil may be used, or both of the U-shaped coil and the linear coil may be used. Good.
  • a stator core is configured using a first divided core and a second divided core that are formed of massive iron cores formed from a mass of magnetic material.
  • the first divided core and the second divided core formed of the massive iron core are formed in the same shape as the first divided core 22a and the second divided core 22b formed of the laminated core in the first embodiment.
  • the stator core is configured by overlapping the first divided core and the second divided core in the order of the first divided core, the second divided core, and the first divided core.
  • a U-shaped coil is accommodated in the stator core.
  • the fourth embodiment is configured in the same manner as the first embodiment except that the first divided iron core which is a massive iron core and the second divided iron core are stacked to constitute a stator core. Therefore, also in the fourth embodiment, the same effect as that of the first embodiment can be obtained.
  • U-shaped coil 26 is used in the fourth embodiment, only a linear coil may be used, or both a U-shaped coil and a linear coil may be used. .
  • FIG. 18 is a top view of relevant parts showing a stator core in a stator of a rotary electric machine according to Embodiment 5 of the present invention.
  • the holding mechanism 28A includes a coupled portion 225A provided on the outer peripheral portion of the back yoke 220 of the stator core 20A, and a coupling member 226A fitted to the coupled portion 225A.
  • the to-be-connected portion 225A is formed in a concave shape with a triangular cross-section in which the circumferential width gradually narrows toward the inner diameter side.
  • Three coupled portions 225A are distributed in the circumferential direction.
  • the connecting member 226A has a triangular cross section that can be fitted to the connected portion 225A, and is manufactured in a columnar body having a length equal to or longer than the axial length of the stator core 20A.
  • the fifth embodiment is configured in the same manner as the first embodiment except that the holding mechanism 28A is used instead of the holding mechanism 28.
  • stator core 20A includes two first split iron cores 22A and one second split iron core 22B in the order of first split iron core 22A, second split iron core 22B, and first split iron core 22A. , Arranged in contact with each other and arranged coaxially.
  • the first divided core 22A and the second divided core 22B are located at the first position. When it is displaced by a fixed amount in the circumferential direction.
  • the first divided core 22A and the second divided core 22B are in the second position. When positioned, the concave shapes match as viewed from the axial direction.
  • the connecting member 226A Is inserted into each of the connected portions 225A from the radially outer side. Thereby, the first split iron core 22A and the second split iron core 22B can be displaced from the first position to the second position. Then, the connecting member 226A fitted to the connected portion 225A is fixed to the stator core 20A by adhesion, welding or the like. Thereby, the first split iron core 22A and the second split iron core 22B are positioned and fixed at the second position.
  • the holding mechanism 28A is used in place of the holding mechanism 28 in the stator 2 in the first embodiment.
  • holding is performed in the stator in the second embodiment to the fourth embodiment. Similar effects can be obtained by using the holding mechanism 28A instead of the mechanism 28.
  • the connecting member 226A fitted to the connected portion 225A is fixed to the stator core 20A by adhesion, welding or the like. Therefore, when the fixing portion is protruded from both ends of the connecting member 226A and the connecting member 226A is fitted to the to-be-connected portion 225A, the stator core 20A is pinched by the fixing portion from both sides in the axial direction.
  • the connecting member 226A may be held by the stator core 20A.
  • a convex portion is provided in the fixed portion
  • a concave portion is provided in the end face of the stator core 20A
  • the convex portion of the fixed portion and the concave portion of the stator core 20A are fitted to prevent the connection member 226A from coming off.
  • U-shaped coil 26 is used in the fifth embodiment, only a linear coil may be used, or both of the U-shaped coil and the linear coil may be used. Good.
  • the insulating material 27 is each accommodated in the slot 223 in said each embodiment, the insulating material 27 may be abbreviate
  • the stator coil 25 is in direct contact with the inner wall of each of the slots 223 of the stator core 20. The insulation between the stator coil 25 and the stator core 20 is ensured by the insulating film coated on the stator coil 25.
  • the ridge portions 222 of the adjacent teeth 221 may be connected to each other.
  • stator coil 25 is comprised by U-shaped or linear coil
  • a stator coil may be comprised by the turtle-shaped coil.
  • the turtle-shaped coil is inserted into the slot 223 of the stator core 20A from the inner diameter side, the teeth 221 are manufactured with the collar portion 222 omitted.
  • the stator core 20 is configured by coaxially arranging the three divided cores 22.
  • the number of the divided cores 22 constituting the stator core 20 is limited to three. There may be four or more.
  • the five split cores are a first split core group consisting of three first split cores and a second split core group consisting of two second split cores, the first split core, the second split core
  • the first split iron core, the second split iron core, and the first split iron core are arranged coaxially in this order to form a stator core.
  • the stator core may be configured by coaxially arranging the first split core, the first split core, the second split core, the first split core, and the second split core in this order. That is, at least one second split iron core in two second split iron cores constituting the second split iron core group, and two first split irons in three first split iron cores constituting the first split iron core group It should just be located between iron cores.
  • segmentation iron core group is comprised from two 1st division
  • segmentation iron core group is comprised by two types of division
  • the axial direction thickness may differ between the several 1st divided core which comprises a 1st divided core group.
  • the axial direction thickness may differ, as long as the shape seen from the axial direction of the some 2nd divided core which comprises a 2nd divided core group is the same.
  • the first split iron core 22a is configured by laminating a plurality of first core pieces 23a, but the first split iron core 22a is a single ferrous iron core having a thick plate thickness. You may be comprised by the piece 23a.
  • the second split core 22b is configured by laminating a plurality of second core pieces 23b, the second split core 22b is configured by one second core strip 23b having a large thickness. It is also good.
  • the holding mechanisms 28 and 28A for positioning and fixing the first split iron core 22a and the second split iron core 22b at the second position are provided.
  • the first split iron core 22a and the second split iron core 22 b may be further positioned and fixed at the first position. That is, the said holding mechanism has the to-be-connected part which a hole shape or concave shape corresponds seeing from an axial direction, when the 1st division
  • the embodiments can be freely combined, or the embodiments can be appropriately modified or omitted.
  • 2 stator 20, 20A stator core, 21a first split core group, 21b second split core group, 22 split core, 22a, 22A first split core, 22b, 22B second split core, 223 slots, 223a Inner wall on the side, 223b Inner wall on the other side, 225, 225A Connected part, 226, 226A Connecting member, 23 Core piece, 23a First core piece, 23b Second core piece, 25 Stator coil, 26 coil, 27 Insulating material , 28, 28A Holding mechanism.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Manufacture Of Motors, Generators (AREA)
  • Windings For Motors And Generators (AREA)
  • Motor Or Generator Cooling System (AREA)
PCT/JP2019/001321 2018-01-23 2019-01-17 回転電機の固定子及び回転電機の固定子の製造方法 WO2019146499A1 (ja)

Priority Applications (2)

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JP2019567029A JP6843272B2 (ja) 2018-01-23 2019-01-17 回転電機の固定子及び回転電機の固定子の製造方法
CN201980007603.5A CN111630752B (zh) 2018-01-23 2019-01-17 旋转电机的定子和旋转电机的定子的制造方法

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JP2022151699A (ja) * 2021-03-25 2022-10-07 ドクター エンジニール ハー ツェー エフ ポルシェ アクチエンゲゼルシャフト 電気機械用の固定子デバイス及び製造方法
JP7512955B2 (ja) 2021-06-02 2024-07-09 トヨタ自動車株式会社 ステータとその製造方法

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JP2014082804A (ja) * 2012-10-12 2014-05-08 Fanuc Ltd 固定子および回転子を備えた電動機

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JP2022151699A (ja) * 2021-03-25 2022-10-07 ドクター エンジニール ハー ツェー エフ ポルシェ アクチエンゲゼルシャフト 電気機械用の固定子デバイス及び製造方法
JP7307223B2 (ja) 2021-03-25 2023-07-11 ドクター エンジニール ハー ツェー エフ ポルシェ アクチエンゲゼルシャフト 電気機械用の固定子デバイス及び製造方法
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JP7512955B2 (ja) 2021-06-02 2024-07-09 トヨタ自動車株式会社 ステータとその製造方法

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