WO2019142723A1 - Isolateur ainsi que stator et moteur le comprenant - Google Patents

Isolateur ainsi que stator et moteur le comprenant Download PDF

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Publication number
WO2019142723A1
WO2019142723A1 PCT/JP2019/000569 JP2019000569W WO2019142723A1 WO 2019142723 A1 WO2019142723 A1 WO 2019142723A1 JP 2019000569 W JP2019000569 W JP 2019000569W WO 2019142723 A1 WO2019142723 A1 WO 2019142723A1
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WO
WIPO (PCT)
Prior art keywords
coil
winding
insulator
stator
tooth
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Application number
PCT/JP2019/000569
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English (en)
Japanese (ja)
Inventor
菱田　光起
博 米田
浩勝 国友
祐一 吉川
Original Assignee
パナソニックＩｐマネジメント株式会社
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Application filed by パナソニックＩｐマネジメント株式会社 filed Critical パナソニックＩｐマネジメント株式会社
Publication of WO2019142723A1 publication Critical patent/WO2019142723A1/fr

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    • 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
    • H02K15/10—Applying solid insulation to windings, stators or rotors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/32—Windings characterised by the shape, form or construction of the insulation
    • H02K3/34—Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/46—Fastening of windings on the stator or rotor structure

Definitions

  • the present invention relates to an insulator around which a coil is wound, a stator provided with the same, and a motor.
  • Patent Document 1 discloses a configuration in which a step or an inclination is provided inside an end of a cylindrical body of an insulating coil bobbin on which a coil is wound or a ridge portion provided at both ends of the cylindrical body to realize an aligned winding coil. Proposed. Further, according to Patent Document 2, a holding groove for holding a wound coil is provided on a side surface of an insulator which is attached to a tooth and which insulates the coil from the tooth. An arrangement for realizing a coil is disclosed.
  • the above-mentioned insulator and coil bobbin are formed by molding a resin material using a mold.
  • the motor performance varies depending on the user's specifications, even if the same stator core and teeth are used, the wire diameter and the number of turns of the coil are changed to adjust the current value etc. supplied to the coil, and the motor performance is adjusted to the individual specifications. Often included.
  • Patent Document 2 it is necessary to change the width of the holding groove in accordance with the wire diameter of the coil, and a mold is remade each time to form an insulator, which causes an increase in cost. It had become.
  • the winding start portion of the coil is wound around the surface of the insulator while changing the angle from the outlet of the coil introduction groove provided in the collar portion of the insulator.
  • the inner surface of the collar of the insulator may not necessarily be a plane orthogonal to the radial direction, and it was difficult to wind the coil along the inner surface of the collar.
  • due to the restoring force of the winding bent at the outlet of the coil introduction groove there is a case where the winding start portion of the coil can not be wound by aligning with the flange portion of the insulator.
  • the present invention has been made in view of the foregoing, and an object thereof is to provide an insulator capable of aligning wound coils even when the wire diameter of the coil is changed.
  • the insulator according to the present invention positions and fixes the winding on the coil winding portion on the surface of the coil winding portion of the insulator where the second turn of the coil is wound.
  • a positioning portion consisting of an uneven portion was provided.
  • the insulator according to the present invention covers the axial end face of the tooth protruding from the core segment and at least a part of both circumferential side surfaces, and coil winding in which a coil constituted by a winding is wound.
  • a coil a first ridge portion having a coil introduction groove continuously provided on one of a tooth base end side and a tooth tip end side of the coil winding portion and guiding the coil to the coil winding portion;
  • An insulator comprising: a second ridge portion continuously provided on the other of the tooth base end side and the tooth tip end side of a winding portion, wherein at least two of the surfaces of the coil winding portion are at least 2
  • the positioning part which consists of an uneven part which positions and fixes the above-mentioned winding to the above-mentioned coil winding part is provided in the part by which a circumference is wound, and the average length of the above-mentioned uneven part is more Too short
  • the second turn of the coil is positioned and fixed, and the first turn of the coil is wound along the first ridge portion without disturbance with the winding wound on the second turn as a position reference. be able to.
  • the first round of the coil is aligned and wound even when coils having different wire diameters are wound around the insulator. be able to.
  • the positioning portion is provided at a half or more of a wire diameter of the coil and a portion which is several times or less of a wire diameter of the coil including a portion around which at least a second turn of the coil is wound.
  • the winding wound around the positioning portion can be securely fixed.
  • arithmetic mean roughness of the said uneven part comprised to the said positioning part is 10 micrometers or more and 100 micrometers or less.
  • the uneven portion provided in the positioning portion may be formed by blasting the surface of the coil winding portion.
  • the uneven portion may be formed by aluminum spraying on the surface of the coil winding portion, or the uneven portion may be formed by etching on the surface of the coil wound portion.
  • the uneven portion can be formed by a simple method, and an increase in the manufacturing cost of the insulator can be suppressed.
  • the first turn of the coil abuts on the second turn to move radially outward. It is preferable to be configured.
  • the second turn of the coil is positioned and fixed, and the first turn in contact with the second turn is moved radially outward, so that the first turn of the coil is wound without disturbance. can do.
  • the winding wound around the coil winding portion other than the positioning portion abuts against the winding positioned and fixed by the positioning portion, and moves inward in the radial direction and the first layer of the coil It is preferable to be configured to be aligned and wound.
  • the winding wound around other than the positioning portion contacts the second turn of the coil whose position is fixed, and moves radially inward so that the gap between the windings is eliminated,
  • the first layer coil can be alignedly wound on the coil winding portion.
  • the insulator is provided on each of axial end faces of the teeth of the core segment, and a stator segment formed by winding a coil formed of a winding around the coil winding portion of the insulator A plurality of the stator segments are connected in an annular shape, and the teeth project radially inward of the annular ring.
  • the coil space factor in the stator can be increased.
  • the coil is aligned and wound around the coil winding portion.
  • a space between the teeth adjacent in the circumferential direction is configured as a slot for accommodating the coil, and an insulating paper for insulating the core segment and the tooth from the coil is covered in the slot so as to cover the side surface of the tooth And it is preferable to arrange
  • the motor according to the present invention comprises the insulator at each axial end face of the tooth of the core segment, and a plurality of stator segments in which the coil is wound around the coil winding portion of the insulator,
  • a stator including a plurality of stator segments connected in an annular shape, and including a structure in which the tooth protrudes inward in the radial direction of the annular ring, and arranged radially inward of the stator at a predetermined distance from the stator And at least a rotor including the rotating shaft.
  • the coil space factor in the stator can be increased, and the efficiency of the motor can be improved.
  • FIG. 1 is a top view of a motor according to an embodiment.
  • FIG. 2 is an equivalent circuit diagram of the motor shown in FIG.
  • FIG. 3 is a schematic view of a stator.
  • FIG. 4A is a perspective view showing a portion surrounded by a broken line shown in FIG.
  • FIG. 4B is a side view of the structure shown in FIG. 4A as viewed in the radial direction.
  • FIG. 4C is a side view of the structure shown in FIG. 4A as viewed from the circumferential direction.
  • FIG. 5A is a perspective view showing the main part of the insulator according to one embodiment.
  • FIG. 5B is a schematic view of the insulator as viewed from the axial direction.
  • FIG. 5C is a schematic cross-sectional view taken along line VC-VC in FIG. 5B.
  • FIG. 6 is a schematic view showing a process of aligning and winding coils on an insulator according to an embodiment.
  • FIG. 1 shows a top view showing a motor according to this embodiment
  • FIG. 2 shows an equivalent circuit diagram of the motor shown in FIG. 1
  • FIG. 3 shows a schematic diagram of a stator
  • the stator 4 is a shaft 2
  • FIGS. 1 and 3 show a schematic diagram of a stator
  • the stator 4 is a shaft 2
  • FIGS. 1 and 3 illustration and description of some components and their functions are omitted.
  • the frame and the bus bar are not shown.
  • the insulator 5 is not shown.
  • the exterior body which accommodates the stator 4 is not shown in figure.
  • the shape of the exterior body is, for example, a cylinder made of metal, a substantially rectangular parallelepiped, a substantially rectangular parallelepiped, a polygonal columnar body or the like, and is appropriately selected according to the specification of the motor 1.
  • the components shown in the drawings are also simplified.
  • the insulator 5 shown in FIG. 1 is partially different from the actual shape, and the coils U1 to W4 and their lead terminals 71 shown in FIG.
  • the shape of the is very different.
  • the symbol + indicates the winding start of the coil
  • the symbol ⁇ indicates the winding end of the coil.
  • the longitudinal direction of the shaft 2 may be referred to as an axial direction
  • the radial direction of the stator 4 may be referred to as a radial direction
  • the circumferential direction of the stator 4 may be referred to as a circumferential direction.
  • the side on which the lead terminals 71 of the coils U1 to W4 are provided is referred to as "upper” and the opposite side is referred to as “lower”
  • the side on which the rotor is provided may be referred to as "inside” and the opposite side, that is, the side of the stator core 40 may be referred to as "outside”.
  • the lamination direction of the magnetic steel sheets to be described later and the above axial direction are the same direction and are synonymous.
  • teeth plural type of teeth
  • the plurality of teeth projecting in the center direction of the annular stator core is referred to as teeth (a plurality of teeth).
  • teeth a plurality of teeth
  • one tooth is described as a tooth 42.
  • a plurality of teeth in the core segment 41 described later is referred to as teeth.
  • one tooth portion of the plurality of tooth portions in the core segment 41 is described as a tooth 42.
  • the motor 1 includes a rotor 3 having a shaft 2 which is a rotation shaft of the motor 1, a stator 4 and coils U1 to W4 inside an outer body (not shown).
  • the rotor 3 includes a shaft 2 and magnets 31 in which N poles and S poles are alternately disposed along the outer peripheral direction of the shaft 2 so as to face the stator 4.
  • a neodymium magnet is used as the magnet 31 used for the rotor 3.
  • the material, shape, and material of the neodymium magnet can be appropriately changed according to the output of the motor.
  • the rotor 3 is disposed radially inward of the stator 4 at a constant distance from the stator 4.
  • the stator 4 is a cylindrical body configured by connecting a plurality of stator segments 40a in an annular shape.
  • the insulators 5 are respectively attached to the teeth 42 of the core segment 41 from the upper and lower end faces in the axial direction, and an insulator such as insulating paper 6 is attached between the insulators 5 Windings are wound around the coil winding portion 50 and the arrangement portion of the insulator such as the insulating paper 6 (see FIGS. 4A to 4C) to constitute, for example, the coil U1.
  • the external appearance of the stator segment 40a configured as described above is a columnar body having a substantially sectoral cross-sectional shape.
  • the stator 4 and the stator segment 40 a have a plurality of core segments 41 and teeth 42 projecting radially inward from the inner circumferences of the core segments 41.
  • the core segment 41 is formed by punching a magnetic steel sheet containing silicon or the like as a core segment sheet which forms a part of a substantially annular stator core sheet. It is a layered product which laminated this board (core segment sheet) in multiple layers.
  • the appearance of the core segment 41 configured as described above is a columnar body having a cross-sectional shape that is a piece-like shape that constitutes a part of a substantially annular stator core sheet.
  • the stacking direction of the plate is a normal direction to the plate surface of the plate.
  • the core segment 41 has a yoke portion 41c and a tooth 42 projecting from a substantially central portion of the yoke portion 41c.
  • the core segment 41 has a recess 41a formed on one side of the yoke portion 41c located in the circumferential direction, and a protrusion 41b formed on the other side. Both the recess 41a and the protrusion 41b have an axis in each side. It is formed extending in the entire direction. Focusing on one core segment 41, the convex portion 41b of the core segment 41 adjacent in the circumferential direction fits into the concave portion 41a of the core segment 41, and the convex portion 41b of the core segment 41 extends in the circumferential direction. On the other hand, they are fitted and connected to the recesses 41 a of the adjacent core segments 41.
  • the annularly shaped stator core 40 is configured by the core segments 41 adjacent in the circumferential direction being fitted and connected as described above.
  • interval of the tooth 42 adjacent to the circumferential direction comprises the slot 43.
  • the stator 4 has 12 coils U1 to W4. These coils are attached to each tooth 42 through the insulator 5 and the insulating paper 6 (see FIGS. 4A to 4C). As viewed from the direction, they are disposed in each slot 43.
  • the coils U1 to W4 are each composed of a winding having a circular cross section made of a metal material such as copper with an insulating film applied on the surface, and wound in parallel with the insulator 5 by multilayer winding. It is done.
  • the multi-layer winding refers to a state in which the coil 7 is wound around the insulator 5 in a plurality of layers.
  • circuit means “circular” including processing tolerance of the winding and deformation of the winding when wound around the tooth 42, and the same applies to the following description. Further, in the following description, when one of the coils U1 to W4 is taken up to describe a structure or the like without specifying the coil U1 to W4, the coil 7 is called.
  • the coils U1 to U4, V1 to V4, and W1 to W4 are connected in series, and three phases of U, V, and W phases are star-connected.
  • three U-, V- and W-phase currents having a phase difference of 120 ° in electrical angle with each other are supplied to coils U1 to U4, V1 to V4 and W1 to W4, respectively, and excited to generate a rotating magnetic field.
  • a torque is generated in the rotor 3 by the rotating magnetic field, and the shaft 2 is supported by a bearing (not shown) and rotated.
  • the number of magnetic poles of the rotor 3 is ten in total: five N poles and five S poles facing the stator 4 and the number of slots 43 is twelve, but in particular The present invention is not limited to the above, and may be applied to other combinations of the number of magnetic poles and the number of slots.
  • FIGS. 4A to 4C respectively show a perspective view of a portion surrounded by a broken line in FIG. 1, and a side view seen from the radial direction and the circumferential direction. Note that the illustration of the coil 7 is omitted in FIGS. 4A to 4C for the convenience of description. Further, the insulating paper 6 sandwiched and attached between the insulator 5 and the core segment 41 and the tooth 42 is also illustrated, but shows the state before being folded so as to be accommodated in the slot 43.
  • insulators 5 having the same shape are respectively attached to the teeth 42 projecting from one core segment 41 from the upper and lower end faces in the axial direction, respectively.
  • the insulating paper 6 is sandwiched between the tooth 42 and the insulator 5.
  • the insulators 5 are provided so as to cover both axial end surfaces of the tooth 42 and portions near the both end surfaces.
  • the insulator 5 is an insulating member formed by molding an insulating resin material, and a coil winding portion 50 on which the coil 7 (see FIG. 6) is wound and a first portion formed at one end of the coil winding portion 50. It has a collar 51 and a second collar 52 formed at the other end.
  • the first collar 51 is mounted on the core segment 41 side
  • the second collar 52 is mounted on the tip of the tooth 42 located radially inward of the stator 4.
  • a coil introduction groove 53 (see FIGS.
  • the inner surface 51 a of the first flange portion 51 is a surface provided parallel to a surface orthogonal to the axial upper end surface or the axial lower end surface of the tooth 42.
  • the winding start portion of the coil 7 refers to the vicinity of the first turn of the first layer coil wound around the coil winding portion 50 in the coil 7.
  • Positioning portions 54 are provided on outer circumferential surfaces 50 a to 50 d of coil winding portion 50 (hereinafter sometimes simply referred to as the surface of coil winding portion 50) at predetermined intervals from inner surface 51 a of first collar portion 51. It is formed. As described later, the positioning unit 54 is surface-treated so that the arithmetic average roughness Ra (see FIG. 5C) is larger than the surface of the coil winding unit 50 other than the positioning unit 54 (hereinafter referred to as the smooth surface unit 55). Is formed. In addition, coil winding unit 50 is, for example, 0. 0. to maintain electrical insulation between coil 7 and tooth 42. It is formed with a thickness of about several mm to 3 mm.
  • surfaces 50c, 50d covering both circumferential end surfaces of the tooth 42 are formed to be orthogonal to the axial upper end surface of the tooth 42.
  • the term “perpendicular” means “perpendicular” including the processing tolerance of the insulator 5, the processing tolerance of the tooth 42, and the assembly tolerance at the time of attaching the insulator 5 to the tooth 42. It means “parallel” including the processing tolerance of and the assembly tolerance at the time of attaching the insulator 5 to the tooth 42, and the same applies to the following description.
  • the insulator 5 has a function to electrically insulate the core segment 41 and the tooth 42 from the coil 7 together with the insulating paper 6. Further, the insulator 5 has a function of stably maintaining the alignment winding of the coil 7 described later.
  • the insulating paper 6 is impregnated with, for example, an insulating oil, so as to cover both side surfaces of the tooth 42 in the circumferential direction, and in the axial direction with the first and second flange portions 51, 52 of the insulator 5, respectively. It is arranged so as to partially overlap. Further, although not shown, the insulating paper 6 is folded so as to cover the inside of the slot 43 when assembling the motor 1. As a result, the core segment 41 and the tooth 42 and the coil 7 can be electrically isolated from each other, and the core segment 41 and the tooth 42 adjacent in the circumferential direction can be electrically isolated.
  • FIG. 5A shows a perspective view of the main part of the insulator according to the present embodiment
  • FIG. 5B shows a schematic view of the main part of the insulator around which the coil is wound, viewed from the axial direction
  • FIG. 5C shows FIG. The cross section schematic diagram in the VC-VC line in is shown.
  • the insulator 5 shown in FIGS. 5A to 5C is the same as that shown in FIGS. 4A to 4C, the structure of the insulator 5 is simplified and shown in FIGS. 5A to 5C for the convenience of description.
  • positioning portions are formed at positions separated from the lower end in the axial direction of the first collar portion 51, that is, the inner surface of the first collar portion 51. 54 are provided with a predetermined width W.
  • the predetermined interval corresponds to a portion where the first winding of the first layer, which is the winding start portion of the coil 7, is wound. That is, the positioning unit 54 is provided at least at a position where the second turn of the first layer in the coil 7 is to be wound.
  • the surface of the coil winding portion 50 located radially inward of the positioning portion 54 and the portion where the first layer winding of the first layer is wound corresponds to the smooth surface portion 55 described above.
  • the positioning portion 54 is composed of the uneven portion 54a formed randomly, and the uneven portion 54a is formed such that the arithmetic average roughness Ra of the surface is 10 ⁇ m or more and 100 ⁇ m or less.
  • the arithmetic mean roughness Ra ′ of the surface of the smooth surface portion 55 is smaller than the arithmetic mean roughness Ra of the concavo-convex portion 54a, and is about one to several hundredths of several tens of Ra. In, for example, Ra ′ is about 0.25 ⁇ m to 0.30 ⁇ m.
  • the average length L of the concavo-convex portion 54a is a value substantially equal to the arithmetic average roughness Ra, and the average length L is shorter than the wire diameter of the coil 7 wound around the coil winding portion 50.
  • the average length L is, for example, the average value of the distance between the convex portion and the convex portion adjacent to the convex portion 54a, or the distance between the concave portion and the concave portion adjacent to the concave It corresponds to the average value of Moreover, it is common that the winding which comprises the coil 7 forms an insulating film in the surface of the electric wire which consists of copper etc.
  • the wire diameter of the coil 7 means the wire diameter including the thickness of the insulating film.
  • the wire diameter of the wire used for the coil 7 is about 0.3 mm to 2.3 mm, and the wire diameter of the coil 7 is twice the wire diameter of the wire and the wire diameter of the wire. It becomes a value.
  • the uneven portion 54a is formed.
  • Various methods can be used as surface treatment.
  • the surface of the coil winding portion 50 is covered with a protective material (not shown) except for the portion where the positioning portion 54 is formed.
  • the uneven portion 54a can be formed by blasting the surface not covered by the protective material.
  • Arithmetic mean roughness Ra of the concavo-convex portion 54a can be set to a desired value by adjusting the average particle diameter, the spraying speed, the processing time, and the like of the abrasive to be sprayed.
  • the arithmetic average roughness Ra of the concavo-convex portion 54a can be made a relatively large value. For example, it is possible to set Ra to about several tens of ⁇ m to about 100 ⁇ m.
  • the concavo-convex portion 54 a by performing an etching process on the surface of the comment winding portion 50.
  • the "etching process" referred to here includes both so-called physical etching and chemical etching.
  • the uneven portion 54a can be formed by performing plasma etching using argon gas or the like on the surface of the coil winding portion 50 not covered with a protective material (not shown).
  • the uneven portion 54a can be formed by performing an etching process using a chemical solution on the surface of the coil winding portion 50 which is not covered by the protective material.
  • the uneven portion 54a can be formed by performing surface treatment using a chemical solution containing a strong acid such as concentrated hydrochloric acid or concentrated sulfuric acid.
  • a chemical solution containing a strong acid such as concentrated hydrochloric acid or concentrated sulfuric acid.
  • grooved part 54a is not specifically limited to these methods, According to the value of desired Ra, the material of the insulator 5, etc., another method can be suitably taken. Further, it goes without saying that the protective material is removed after the surface treatment for forming the concavo-convex portion 54a is performed.
  • FIG. 6 is a schematic view of a process in which the coils are wound in alignment on the insulator according to the present embodiment. In addition, in FIG. 6, the process in which the 1st layer of the coil 7 is wound is shown.
  • the first turn of the coil 7 is first wound around the smooth surface portion 55, and as shown in FIG. 6 (b), the second turn of the coil 7 is made. Is wound around the positioning unit 54.
  • the position of the winding of the second turn is fixed by the friction generated with the positioning portion 54.
  • the smooth surface portion 55 has a smooth surface to the extent that the coil 7 can move in the radial direction along the surface when the wound winding receives an external force in the radial direction. Therefore, the winding wound on the smooth surface portion 55 is movable radially outward along the surface of the smooth surface portion 55. At this time, it is assumed that the first turn winding is wound radially inward of a predetermined position.
  • the winding of the second turn wound around the positioning portion 54 is fixed in position as described above, as shown in FIG. 6C, the winding of the first turn is the second turn. Abuts against the winding of and receives force radially outward. As a result, the first-turn winding wound around the smooth surface portion 55 abuts against the inner surface 51 a of the first collar portion 51 and moves radially outward so as to be accommodated at a predetermined position. Further, in this winding process, as shown in FIG.
  • the winding of the i-th turn (i is an integer and 2 ⁇ i ⁇ n, n is the number of turns of the first layer of the coil 7) is (I-1)
  • a winding is made to run on the winding of the (i-1) th turn by a predetermined offset, and is wound at a predetermined angle with respect to the axial direction.
  • the offset is adjusted to be half or less of the wire diameter of the coil 7.
  • the winding on the smooth surface 55 pushed into the winding of the final circumference moves radially outward along the surface of the smooth surface 55, including the winding of the final circumference. Therefore, among the windings wound around the smooth surface portion 55, the winding positioned on the outermost side in the radial direction abuts against the winding wound around the positioning portion 54, and the movement is restricted.
  • the windings wound around the smooth surface 55 located radially outward of the positioning portion 54 are sequentially moved so as to eliminate the gap between the windings with reference to the contact position. As a result, the coil 7 of the first layer is alignedly wound around the coil winding portion 50.
  • the coil 7 of the second layer is wound on the opposite side to the first layer, that is, from the second ridge 52 to the first ridge 51.
  • the winding of the final circumference is further pulled toward the first collar portion 51 in order to draw the winding to the outside.
  • the winding wound around the smooth surface portion 55 is pushed radially outward from the winding of the final circumference. Also by these, the position of the winding of the first layer coil 7 is corrected so as to be aligned and wound.
  • the radial length of the coil winding portion 50 is substantially equal to an integral multiple of the wire diameter of the coil 7, the winding of the final circumference abuts against the inner surface of the second flange portion 52 and the force is applied radially outward.
  • the position of the winding of the first layer coil 7 is corrected so as to be aligned and wound.
  • the winding wound on the smooth surface portion 55 radially moves outward in the radial direction in contact with the winding of the final circumference, alignment winding of the coil 7 becomes possible. As long as an external force is applied to the winding wound on the surface portion 55 radially outward, it is not necessary to wind the coil 7 with an offset as described above.
  • the predetermined width W of the positioning portion 54 may be half or more of the wire diameter of the coil 7 to be wound. However, in order to correspond to the coils 7 of different wire diameters, it is preferable that the predetermined width W be equal to or greater than the maximum wire diameter of the coils 7 scheduled for use. Further, in consideration of the process margin and the like in the winding step, the predetermined width W is preferably equal to or less than the width of several turns of the coil 7. Therefore, the positioning portion 54 is provided in a portion including half or more of the wire diameter of the coil 7 and several times or less of the wire diameter of the coil 7 including a portion around which at least the second turn of the coil 7 is wound. preferable.
  • the insulator 5 covers the axial end surface of the tooth 43 projecting from the core segment 41 and at least a part of both side surfaces in the circumferential direction, and the coil 7 formed of a winding is wound
  • a first winding portion having a coil winding portion 50 to be wound and a coil introduction groove 53 continuously provided on the base end side of the tooth 42 in the coil winding portion 50 and guiding the coil 7 to the coil winding portion 50 51 and a second flange 52 provided continuously on the tip end side of the tooth 42 in the coil winding part 50.
  • the coil winding portion 50 is provided with a positioning portion 54 formed of a concavo-convex portion 54 a for positioning and fixing the winding on a portion of the coil 7 of the first layer where the winding of the second turn is wound. Further, on the surface of the coil winding portion 50, positioning is performed radially outside of the positioning portion 54, that is, at a portion where the first turn winding of the coil 7 is wound and radially inside of the positioning portion 54.
  • a smooth surface portion 55 having a smooth surface to the extent that the winding of the coil 7 can be moved along the radial direction is provided continuously to the portion 54.
  • the winding wound on the smooth surface portion 55 moves along the radial direction, whereby the first winding wound in contact with the second winding whose position is restricted.
  • the wire is aligned and wound at a predetermined position along the inner surface 51 a of the first collar 51.
  • the coil pushed radially outward from the final circumference of the coil 7 moves along the smooth surface portion 55, and the position is restricted by the winding wound around the positioning portion 54.
  • the insulator 5 according to the present embodiment is useful when the single-layer or multi-layer coiled coil 7 is aligned.
  • the width W of the positioning portion 54 it is possible to cope with the case where the wire diameter of the coil 7 to be wound is changed.
  • the width W of the positioning portion 54 is approximately several times the maximum wire diameter of the coil 7 scheduled to be used, all the coils 7 scheduled to be used can be accommodated. Therefore, even if the wire diameter of the coil 7 to be wound is changed, as disclosed in Patent Document 2, the width of the holding groove of the coil provided in the insulator is changed, or it is disclosed in Patent Document 1. As described above, it is not necessary to change the width and the inclination angle of the step provided in the insulator, and it is possible to suppress the increase in the manufacturing cost of the insulator 5.
  • the positioning portion 54 can be formed by performing a simple surface treatment, the manufacturing cost of the insulator 5 can be suppressed. Moreover, even if the wire diameter of the coil 7 is changed with respect to the core segment 41 and the tooth 42 of the same specification, one type of insulator 5 can be coped with, and the development cost when developing various motors It can be reduced.
  • the arithmetic average roughness Ra of the concavo-convex portion 54 a is preferably 10 ⁇ m or more and 100 ⁇ m or less. Further, from the viewpoint of increasing the friction with the winding, the arithmetic mean roughness Ra of the concavo-convex portion 54a is preferably several tens of ⁇ m, for example, 30 ⁇ m or more, and taking account of ease of formation, arithmetic mean The roughness Ra is more preferably 30 ⁇ m or more and 100 ⁇ m or less.
  • the invention is not particularly limited thereto.
  • the coil 7 having a square cross section may be used.
  • a groove (not shown) may be formed instead of the unevenness 54a to provide the positioning portion 54.
  • the insulator 5 is what is called a division type insulator and showed the example mounted
  • the coil winding part 50 is cylindrical shape,
  • the integral structure which covers the whole outer peripheral surface of the tooth 42 may be sufficient.
  • the insulator 5 having this integrated structure may be used.
  • the insulators 5 mounted on the one tooth 42 from above and below may not have the same shape.
  • the shape of the coil introduction groove 53 may be the shape shown in the first and second embodiments.
  • the kind of insulator 5 can be decreased by using the thing of the same shape as the insulator 5 with which one tooth 42 is mounted
  • the outer circumferential surfaces 50 a and 50 b of the coil winding portion 50 may be provided substantially parallel to the axial upper end surface of the tooth 42. Further, the inner surface 51 a of the first flange 51 may be provided so as to be inclined radially outward with a surface orthogonal to the axial upper end surface or the axial lower end surface of the tooth 42 as a reference surface.
  • the insulator 5 is mounted on the tooth 42 of the core segment 41, and the coil 7 is wound around the coil winding portion 50 to form the stator segment 40a.
  • a mode may be adopted in which each of the teeth 42 of the stator core is mounted and the coil 7 is wound around the coil winding portion 50.
  • the annular stator core said here is comprised laminating
  • the annular stator core has a plurality of teeth (so-called teeth).
  • the motor 1 of the present embodiment will be described for use in an inner rotor type motor, it is needless to say that the insulator 5 of the present embodiment can be applied to another type of motor.
  • two concave grooves are provided at the tip (radially inner end) of the tooth 42.
  • the concave grooves are also referred to as supplemental grooves in, for example, US Pat. No. 6,104,117 and Japanese Patent Application Laid-Open No. 10-42531.
  • the effect of the auxiliary groove suppresses cogging torque and torque ripple in the rotational operation of the rotor 3 of the motor 1, and contributes to the reduction of vibration and noise in the characteristics of the motor.
  • the winding in the said embodiment is also called an electric wire for winding, and is marketed.
  • the conductor portion of the winding or the wire for winding includes copper or aluminum containing unavoidable impurities.
  • the unavoidable impurities mean a trace amount of impurity elements which can not be avoided to be mixed into copper and aluminum during the manufacturing process.
  • unavoidable impurities include As, Bi, Sb, Pb, Fe, S, oxygen and the like.
  • unavoidable impurities are Si, Mn, Ti, V, Zr, Fe, Cu and the like.
  • the conductor portion of the winding is covered with an insulating layer of insulating resin.
  • the insulating resin for example, a polyimide, a polyamideimide, a polyesterimide, a polyesteramide imide, a polyamide, a polyhydantoin, a polyurethane, a polyacetal, an epoxy resin and the like are appropriately selected according to the specification of the motor 1.
  • the cross-sectional shape of the winding may be various, such as approximately square or approximately rectangular.
  • the material component of the magnet 31 in the above embodiment includes at least one of Sc, Y and a lanthanoid element, Fe or Fe and Co, and B.
  • the magnet 31 is a rare earth sintered magnet, and is so-called neodymium sintered magnet or neodymium sintered magnet or the like.
  • the surface layer of the rare earth sintered magnet is provided with a rust prevention film (rust prevention layer) for rust prevention.
  • the insulator according to the present invention can realize an aligned winding coil corresponding to a coil having a different wire diameter, and therefore is useful for application to a motor or the like that requires high efficiency.
  • Reference Signs List 1 motor 2 shaft 3 rotor 4 stator 5 insulator 6 insulating paper 7 coil 31 magnet 40 stator core 40 a stator segment 41 core segment 41 c yoke portion 42 tooth (tooth) 43 slot 50 coil winding portion 51 first ridge portion 51a inner surface of first ridge portion 51 second ridge portion 53 coil introduction groove 54 positioning portion 54a uneven portion 55 smooth surface portion U1 to W4 coil W radial direction of positioning portion 54 Width of

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Insulation, Fastening Of Motor, Generator Windings (AREA)

Abstract

La présente invention concerne un isolateur (5) qui comprend : une première partie de bride (51) qui est disposée côté segment de noyau (41) d'une partie d'enroulement de bobine (50) sur laquelle une bobine (7) est enroulée, et comporte une rainure d'introduction de bobine (53) destinée à guider la bobine (7) vers la partie d'enroulement de bobine (50) ; et une seconde partie de bride (52) qui est disposée côté pointe d'une dent (42) de la partie d'enroulement de bobine (50). Une partie de positionnement (54) qui comprend une partie surélevée et évidée (54a) est disposée au niveau d'une partie de la surface de la partie d'enroulement de bobine (50) où le second recouvrement est enroulé. La longueur moyenne de la partie surélevée et évidée (54a) est inférieure au diamètre du fil de la bobine (7) et la rugosité moyenne arithmétique (Ra) de la partie surélevée et évidée (54a) est supérieure à la rugosité moyenne arithmétique (Ra') de parties de surface lisses (55), qui sont les parties de la partie d'enroulement de bobine (50) autres que la partie de positionnement (54).
PCT/JP2019/000569 2018-01-19 2019-01-10 Isolateur ainsi que stator et moteur le comprenant WO2019142723A1 (fr)

Applications Claiming Priority (2)

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JP2018007175 2018-01-19
JP2018-007175 2018-01-19

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WO2019142723A1 true WO2019142723A1 (fr) 2019-07-25

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2021126019A (ja) * 2020-02-07 2021-08-30 パナソニックＩｐマネジメント株式会社 巻枠部材及びそれを備えた固定子、モータ、巻枠部材の製造方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5926567Y2 (ja) * 1976-02-05 1984-08-02 日本テクニカル株式会社 コイルボビン
JPH05258940A (ja) * 1992-03-12 1993-10-08 Murata Mfg Co Ltd コイル
JP2000341896A (ja) * 1999-05-25 2000-12-08 Mitsubishi Electric Corp 回転電機
JP2008206322A (ja) * 2007-02-21 2008-09-04 Mitsubishi Electric Corp 電機子の絶縁シートおよび電機子
JP2012151932A (ja) * 2011-01-17 2012-08-09 Mitsubishi Electric Corp インシュレータ
JP2013243836A (ja) * 2012-05-21 2013-12-05 Mitsubishi Electric Corp 電機子のインシュレータおよび電機子

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5926567Y2 (ja) * 1976-02-05 1984-08-02 日本テクニカル株式会社 コイルボビン
JPH05258940A (ja) * 1992-03-12 1993-10-08 Murata Mfg Co Ltd コイル
JP2000341896A (ja) * 1999-05-25 2000-12-08 Mitsubishi Electric Corp 回転電機
JP2008206322A (ja) * 2007-02-21 2008-09-04 Mitsubishi Electric Corp 電機子の絶縁シートおよび電機子
JP2012151932A (ja) * 2011-01-17 2012-08-09 Mitsubishi Electric Corp インシュレータ
JP2013243836A (ja) * 2012-05-21 2013-12-05 Mitsubishi Electric Corp 電機子のインシュレータおよび電機子

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2021126019A (ja) * 2020-02-07 2021-08-30 パナソニックＩｐマネジメント株式会社 巻枠部材及びそれを備えた固定子、モータ、巻枠部材の製造方法
JP7445914B2 (ja) 2020-02-07 2024-03-08 パナソニックＩｐマネジメント株式会社 巻枠部材及びそれを備えた固定子、モータ、巻枠部材の製造方法

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