WO2019146450A1 - Isolant, stator pourvu de celui-ci, et moteur - Google Patents

Isolant, stator pourvu de celui-ci, et moteur Download PDF

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Publication number
WO2019146450A1
WO2019146450A1 PCT/JP2019/000940 JP2019000940W WO2019146450A1 WO 2019146450 A1 WO2019146450 A1 WO 2019146450A1 JP 2019000940 W JP2019000940 W JP 2019000940W WO 2019146450 A1 WO2019146450 A1 WO 2019146450A1
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WO
WIPO (PCT)
Prior art keywords
coil
insulator
stator
winding portion
tooth
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Application number
PCT/JP2019/000940
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English (en)
Japanese (ja)
Inventor
菱田　光起
浩勝 国友
博 米田
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 WO2019146450A1 publication Critical patent/WO2019146450A1/fr

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    • 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.
  • holding for holding a wound coil which is mounted on a tooth and which comprises a plurality of grooves on a side surface of an insulator for insulating the coil and the tooth.
  • a configuration is disclosed that provides a portion to realize an aligned winding coil.
  • 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.
  • the present invention has been made in view of the above-mentioned point, and an object thereof is to provide an insulator capable of realizing aligned winding with respect to a coil having various wire diameters and winding numbers.
  • the coil winding portion is provided with the housing groove, and the coil alignment member in which the coil holding portion is formed is fitted into the housing groove.
  • 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 has a coil winding portion on which a coil consisting of a winding is wound.
  • the coil winding portion is formed with a housing groove extending in the radial direction from one end to the other end, and a coil alignment member having a coil holding portion including a plurality of grooves is the coil winding.
  • the coil holding portion is disposed on an end face in the axial direction of the coil winding portion by being provided separately from the coil portion and the coil positioning member being fitted in the housing groove, and
  • the circumferential width is not more than half the circumferential width of the axially upper end surface of the coil winding portion, or within 8 times the wire diameter of the coil.
  • the coils are aligned by mounting the coil alignment member in which the coil holding portion having the corresponding groove width or the number of grooves is formed. It can be rolled. Further, the change in the winding position of the coil with respect to the coil holding portion can be reduced, and the coil can be reliably aligned and wound with respect to the coil winding portion. Thereby, since the insulator main body can be made common, the manufacturing cost of an insulator can be reduced.
  • the accommodation groove is formed in at least one of a central portion in a circumferential direction in an axial upper end surface of the coil winding portion and a central portion in a circumferential direction in an axial lower end surface, and the width of the axial upper end surface or the lower end surface Preferably, it is formed to be inclined at a predetermined angle with respect to the circumferential direction.
  • the change in the winding position of the coil with respect to the coil holding portion can be reduced, and the coil can be reliably aligned and wound with respect to the coil winding portion.
  • one end of the coil alignment member is wider than the other portion of the coil alignment member.
  • the radial length of the coil holding portion may be shorter than the radial length of the coil winding portion. In that case, the radial length of the coil holding portion is preferably half or more of the radial length of the coil winding portion.
  • the same insulator body can be used for coils having various numbers of turns or wire diameters, and the cost of the insulator can be reduced.
  • the coil can be aligned and wound on the coil winding portion without causing winding distortion of the coil.
  • a coil alignment member according to the number of turns, wire diameter and winding direction of the coil among a plurality of types of coil alignment members in which at least one of the number of grooves of the coil holding portion, the groove width, and the inclination direction of the grooves are different from each other Is preferably selected and attached to the coil winding.
  • the stator according to the present invention comprises the insulator on at least one of the axial end faces of the teeth of the core segment, and a stator segment formed by winding a coil comprising 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 be 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 on at least one of the axial end faces of the teeth of the core segment, and a stator segment in which a coil consisting of a winding is wound on the coil winding portion of the insulator.
  • a stator comprising a plurality of stator segments including a plurality of stator segments connected in an annular shape, and a structure in which the teeth project radially inward of the annular ring, and a predetermined distance from the stator radially inward of the stator And at least a rotor including a rotating shaft disposed open.
  • the coil space factor in the stator can be increased, and the efficiency of the motor can be improved.
  • an aligned winding coil can be realized by changing the coil alignment member for coils having different wire diameters and winding numbers.
  • 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 perspective view of a coil alignment member according to an embodiment.
  • FIG. 5C is a schematic cross-sectional view taken along line VC-VC in FIG.
  • FIG. 5A is a schematic cross-sectional view of a mode in which a coil is wound around the insulator shown in FIG. 5C.
  • FIG. 6 is a perspective view showing the main part of another insulator main body according to one embodiment.
  • FIG. 7 is a schematic view of yet another insulator according to one embodiment as viewed from the axial direction.
  • 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. 5D) 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.
  • the coil introduction groove 53 is formed in the first collar portion 51, and when the coil is wound around the coil winding portion 50, the winding constituting the coil 7 is the coil introduction groove 53.
  • the winding start portion is guided to the coil winding portion 50 in contact with the inner surface 51a (hereinafter referred to as the inner surface 51a of the first collar portion 51) facing the second collar portion 52 in the first collar portion 51.
  • 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.
  • a storage groove 54 is formed in an outer peripheral surface 50 a covering the axial direction upper end face of the tooth 42 among the outer peripheral surfaces of the coil winding portion 50, and a coil aligning member separately formed from the coil winding portion 50. 55 is fitted into the receiving groove 54.
  • a coil holding portion 56 is formed on the coil alignment member 55.
  • the insulator main body 5a includes a coil winding portion 50 including the accommodation groove 54, a first collar 51 including the coil introduction groove 53, and a second collar 52.
  • the coil winding unit 50 may be referred to as the insulator main body 5a.
  • the insulator main body 5a is collectively molded of an insulating resin material.
  • 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.
  • portions other than the housing groove 54 in the outer peripheral surface 50a are smooth surfaces in which no groove or the like is formed on the surface, similarly to the outer peripheral surfaces 50c and 50d which are both circumferential side surfaces of the coil winding portion 50.
  • the outer peripheral surface 50b is also a smooth surface having no groove or the like formed on its surface.
  • asperities (not shown) generated when forming the insulator 5 with a mold or the like remain.
  • the arithmetic mean roughness of the unevenness is, for example, about 0.25 ⁇ m to 0.3 ⁇ m.
  • 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 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 perspective view of the coil alignment member
  • FIG. 5C shows a schematic cross-sectional view along the line VC-VC in FIG. 5A.
  • FIG. 5D shows the cross-sectional schematic diagram of the aspect by which the coil was wound by the insulator shown to FIG. 5C.
  • FIG. 6 shows the perspective view of the principal part of another insulator main body which concerns on this embodiment.
  • the insulator 5 shown in FIGS. 5A to 5D is the same as that shown in FIGS.
  • FIGS. the structure of the insulator 5 in FIGS. Is illustrated in a simplified manner.
  • FIG. 6 the structure of the insulator main body 5a is illustrated in a simplified manner.
  • a housing groove 54 is formed at the circumferential center of the outer circumferential surface 50a of the coil winding portion 50, and a coil alignment member 55 separately formed from the coil winding portion 50. Is fitted into the receiving groove 54.
  • the coil alignment member 55 is an insulating member formed by molding an insulating resin material in the same manner as the coil winding portion 50 and the first and second collar portions 51 and 52, and as shown in FIG. It is comprised by 55a and the elongate part 55b in which the coil holding
  • the coil holding portion 56 is composed of a plurality of grooves 57 extending obliquely with respect to the circumferential direction.
  • the coil holding portion 56 is disposed on the outer peripheral surface 50a. Further, the depth of the accommodation groove 54 and the thickness of the coil alignment member 55 are adjusted so that the bottoms of the respective grooves 57 in the coil holding portion 56 and the outer peripheral surface 50a except the portion where the accommodation groove 54 is formed are flush. ing. Further, one end portion 54a of the accommodation groove 54 is formed wider than the other portions of the accommodation groove 54, and accordingly, the one end portion 55a of the coil alignment member 55 is circular in a plan view. The coil alignment member 55 is formed wider so as to be wider in the circumferential direction than the elongated portion 55b.
  • the circumferential width of the elongated portion 55b of the coil alignment member 55 is not more than half the circumferential width of the outer circumferential surface 50a of the coil winding portion 50 Or is set to be within 8 times the wire diameter of the coil 7.
  • the winding which comprises the coil 7 forms an insulating film in the surface of the electric wire which consists of copper etc.
  • the term “wire diameter of the coil 7” means the wire diameter including the thickness of the insulating film, and specifically, the wire diameter of the coil 7 is twice the thickness of the insulating film to the wire diameter of the conducting wire. Value.
  • the groove 57 is not formed on the back surface of the coil alignment member 55, that is, on the lower end surface in the axial direction. Further, one end 54 a of the accommodation groove 54 is formed to extend in the coil introduction groove 53 located on the radially outer side of the coil winding portion 50, and one end 55 a of the coil alignment member 55 is one end of the accommodation groove 54. Fits in 54a.
  • the other end 55c of the coil alignment member 55 is located radially outward of the second flange 52 by a predetermined distance, and the other end 55c and the second end 55c There is a region where the groove 57 is not formed between the ridge portion 52 and the ridge portion 52.
  • the coil 7 is wound around the coil winding portion 50, as shown in FIG. 5D, the coil 7 is fitted into each of the plurality of grooves 57 in the coil holding portion 56 and positioned and fixed.
  • the coil 7 is wound directly on the surface of the coil winding portion 50 from the one end 55 a of the coil alignment member 55 to the second flange 52.
  • the coil alignment member 55 is fixed to the coil winding portion 50 using an adhesive or the like in order to prevent detachment.
  • an adhesive sheet, an adhesive resin, or the like may be provided on the bottom of the accommodation groove 54, or the same adhesive may be provided on the back surface of the coil alignment member 55.
  • the coil alignment member 55 and the coil winding portion 50 are formed of the same material. By making both of the same material, for example, the thermal expansion coefficients can be made the same.
  • the coil alignment member 55 can be used as a coil by suppressing the occurrence of dimensional difference between the coil alignment member 55 and the housing groove 54. It can be fixed securely to the winding portion 50.
  • the materials and physical properties of the two, in particular the thermal expansion coefficient, may be close to each other, and they do not have to be the same.
  • the coil alignment member 55 and the accommodation groove 54 may not be significantly deformed or damaged.
  • FIG. 5A shows an example in which one end 55a of the coil alignment member 55 is fitted into one end 54a of the accommodation groove 54 formed in the coil introduction groove 53, but the invention is not particularly limited thereto.
  • the notch 51b As shown in FIG. 6, by forming the notch 51b from the axial upper end face of the first collar 51 to the coil winding portion 50, the one end 54a of the accommodation groove 54 is formed. You may
  • the insulator 5 covers the axial end face of the tooth 42 protruding 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.
  • the coil winding unit 50 is provided.
  • the coil winding portion 50 is formed with a housing groove 54 extending in the radial direction from one end of the coil winding portion 50 to the other end, and a coil alignment member 55 having a coil holding portion 56 consisting of a plurality of grooves 57. Is provided separately from the coil winding unit 50.
  • the coil holding portion 56 is disposed on the outer peripheral surface 50 a which is an axial end surface of the coil winding portion 50.
  • the coil alignment member 55 corresponding to the number of turns, the wire diameter and the winding direction of the coil 7 is selected from a plurality of different types of coil alignment members 55, and the coil 7 is aligned and wound only by mounting on the coil winding portion 50.
  • the insulator main body 5a can be made common by this, the manufacturing cost of the insulator 5 can be reduced. Further, the development cost when developing various motors can be reduced, and the coil alignment member 55 can also be shared if the wire diameter of the coil 7 is the same.
  • the insulator 5 according to the present embodiment can cope with the case where the winding direction of the coil 7 is clockwise or counterclockwise by changing the direction of inclination of the plurality of grooves 57 in the coil holding portion 56. .
  • a housing groove 54 is formed at a central portion in the circumferential direction of the outer peripheral surface 50a which is an axial direction upper end surface of the coil winding portion 50, and the coil alignment member 55 is mounted.
  • the inclination of the winding differs depending on the wire diameter of the coil 7, the circumferential width of the coil winding portion 50, and the like.
  • the winding position of the coil 7 with respect to the coil holding portion 56 is largely shifted due to the difference in the inclination of the winding of the coil 7.
  • the coil alignment member 55 is attached to the circumferential center of the outer peripheral surface 50a as described above, the coil holding portion is wound when the coil 7 is wound obliquely to the coil winding portion 50.
  • the change in the winding position of the coil 7 with respect to 56 can be reduced, and the coil 7 can be reliably aligned and wound with respect to the coil winding portion 50.
  • the width in the circumferential direction of the coil holding portion 56 is set to half or less of the width in the circumferential direction of the outer circumferential surface 50a or within 8 times the wire diameter of the coil 7, the coil relative to the coil holding portion 56 The change in the winding position of 7 can be reduced, and the coil 7 can be reliably aligned and wound with respect to the coil winding portion 50. If the inclination of the winding of the coil 7 is small enough to ignore, the extending direction of each groove 57 in the coil holding portion 56 may be orthogonal to the radial direction. Further, as described above, "orthogonal" as used herein means that they include orthogonality, including machining tolerances and assembly tolerances of members.
  • one end 54 a of the accommodation groove 54 is formed wider than the other parts of the accommodation groove 54, and one end 55 a of the coil alignment member 55 is formed wider than the other parts of the coil alignment member 55.
  • the coil alignment member 55 can be reliably positioned.
  • the inclination direction of each groove 57 in the coil holding portion 56 is different.
  • the grooves 57 are disposed in an inclined manner in the opposite direction to the intended inclination, and the alignment winding of the coil 7 can not be realized.
  • the inclination angle of the winding of the coil 7 largely changes, but keeping the height and volume of each of the grooves 57 of the coil alignment member 55 shown in FIG. Help to align.
  • the inclination of the coil 7 is changed by changing the width of the outer peripheral surface 50a. For this reason, it is necessary to make each of the grooves 57 have a shape corresponding to each inclination angle, and the volume in which the coils 7 can be aligned is reduced. Therefore, in order to suppress this volume reduction, it is preferable to form the groove 54 in a shape having an inclination at a predetermined angle in the circumferential direction.
  • FIG. 7 is a schematic view of yet another insulator according to the present embodiment as viewed from the axial direction.
  • the receiving groove 54 is provided at the central portion of the outer peripheral surface 50a as viewed in the circumferential direction, and is inclined by a predetermined angle ⁇ or ⁇ ′ in the circumferential direction.
  • the inclination of the groove 57 can be made to correspond to the change in the inclination of the coil 7.
  • the longitudinal direction of the accommodation groove 54 in this case, the radial direction, is inclined from the center line extending in the radial direction of the coil holding portion 50 by a predetermined angle ⁇ or ⁇ ′.
  • the inclination angles ⁇ and ⁇ ′ of the accommodation groove 54 can be appropriately changed according to the width of the outer peripheral surface 50 a, the wire diameter of the coil 7 and the like.
  • the change of the width of the outer peripheral surface 50a can also be coped with by changing the shape of the groove 57 formed in the coil holding portion 56.
  • the shape of the groove 57 extending in the circumferential direction is changed halfway.
  • the width of the outer peripheral surface 50a By changing the width of the outer peripheral surface 50a, the area in which the groove 57 is disposed obliquely becomes different.
  • the shape of the groove 57 is changed halfway in order to provide a state in which the groove 54 is not present at the location where the coil 7 is disposed. This can maintain the alignable volume of the coil 7.
  • an error in the mounting direction can be eliminated by forming the one end 55a wider than the elongated portion 55b, and assembly failure in the manufacturing process of the motor 1 Can be reduced. Further, the coil alignment member 55 can be easily handled and fitted into the receiving groove 54 by gripping or suctioning the wide end 55 a. As a result, the time required for the manufacturing process can be shortened and assembly defects can be reduced.
  • the radial length of the coil holding portion 56 is made shorter than the radial length of the coil winding portion 50. Specifically, the minimum length among the radial lengths of the coil 7 scheduled to be used By setting the dimensions and the radial length of the coil holding portion 56 to be substantially the same, the same insulator body 5a can be used for the coil 7 having various numbers of turns or wire diameters. Moreover, if it is the coil 7 of the specification from which only the frequency
  • the coil 7 is wound on the smooth surface of the coil winding unit 50 in the vicinity of the second flange 52 as shown in FIG. 5D.
  • the radial length of the coil holding portion 56 is half or more of the radial length of the coil winding portion 50, the subsequent smoothing is performed by the influence of the coil 7 wound so as to be aligned with it. It is possible to align and wind the coil 7 with respect to the coil winding portion 50 without causing winding disorder in the coil 7 wound on the surface.
  • the thickness of the axial direction upper part in the coil winding part 50 becomes thin partially by forming the accommodation groove 54, in order to insulate the tooth 42 and the coil 7 reliably from this part, a coil is originally It is formed thicker than the circumferential side portion of the winding portion 50.
  • the coil alignment member 55 fitted in the housing groove 54 is also an insulating member. Therefore, even if the coil 7 is wound around the coil holding portion 56 of the coil alignment member 55, the tooth 42 and the coil 7 can be reliably insulated.
  • the insulator 5 according to the present embodiment to, for example, the stator 4 of the motor 1 shown in FIG. 1, alignment winding of the coil 7 can be achieved, and a dead space in which the coil 7 in the coil winding unit 50 is not wound. Can be reduced. By this, the space factor of the coil 7 in the slot 43 can be increased, and the efficiency of the motor 1 can be improved.
  • the accommodation groove 54 is provided on the outer peripheral surface 50a which is the upper end surface in the axial direction of the coil winding portion 50 to mount the coil alignment member 56.
  • the housing alignment groove 55 may be provided on the surface 50 b to mount the coil alignment member 55.
  • the coil alignment member 55 may be disposed on either or both of the outer peripheral surfaces 50a and 50b as necessary.
  • the insulator 5 which concerns on this embodiment covers the axial direction end surface of the tooth 42 which protrudes from the core segment 41, and a part of at least circumferential side both side surface, The coil by which the coil 7 comprised by winding is wound.
  • a second flange 52 may be provided continuously on the tip end side of the tooth 42 in the winding part 50.
  • the coil winding portion 50 is formed with a housing groove 54 extending in the radial direction between the first and second collar portions 51 and 52, and a coil alignment having a coil holding portion 56 consisting of a plurality of grooves 57.
  • a member 55 is provided separately from the coil winding unit 50.
  • the invention is not particularly limited thereto. You may start winding from the 2nd ridge 52 located in the side. In this case, the coil introduction groove 53 is provided in the second flange 52.
  • the invention is not particularly limited thereto. For example, the coil 7 having a square cross section may be used.
  • 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 stator 4 has a structure in which the tooth 42 is attached to the core segment 41 later, the insulator 5 having this integrated structure may be used.
  • the insulators 5 mounted from the upper and lower sides of one tooth may not have the same shape.
  • the kind of insulator 5 can be decreased by using the thing of the same shape as insulator 5 with which one tooth is mounted from the upper and lower sides, and manufacturing cost etc. can be reduced.
  • the coil 7 may be wound without forming the coil introduction groove 53 in the insulator 5.
  • 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 according to the above embodiment can also be applied to the case where the coil 7 is single-layer wound or multi-layer wound.
  • 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 in the above embodiment is described for use in an inner rotor type motor, it goes without saying 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, polyimide, polyamide imide, polyester imide, polyester amide imide, polyamide, polyhydantoin, polyurethane, polyacetal, 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 alignment wound coil corresponding to a coil with a different wire diameter by changing the coil alignment member, and therefore is useful for application to a motor or the like that requires high efficiency. is there.

Landscapes

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

Abstract

L'invention concerne un isolant 5 pourvu : d'une première partie 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 qui comprend une gorge d'introduction de bobine 53 pour guider la bobine 7 vers la partie d'enroulement de bobine 50 ; et d'une seconde partie bride 52 disposée côté extrémité distale d'une dent 42. L'isolant 5 est pourvu d'un élément d'alignement de bobine 55 qui est formé séparément de la partie d'enroulement de bobine 50 et qui a une partie de maintien de bobine 56 comprenant une pluralité de rainures 57. L'élément d'alignement de bobine 55 est ajusté à une rainure de stockage 54 formée dans la partie d'enroulement de bobine 50, et est disposé dans une surface périphérique externe 50a de la partie d'enroulement de bobine 50. La largeur de l'élément d'alignement de bobine 55 dans la direction circonférentielle est égale ou inférieure à la moitié de la largeur de la surface périphérique externe 50a dans la direction circonférentielle.
PCT/JP2019/000940 2018-01-24 2019-01-15 Isolant, stator pourvu de celui-ci, et moteur WO2019146450A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2018-009889 2018-01-24
JP2018009889 2018-01-24

Publications (1)

Publication Number Publication Date
WO2019146450A1 true WO2019146450A1 (fr) 2019-08-01

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5579525U (fr) * 1978-11-28 1980-05-31
JPH0617206U (ja) * 1992-07-29 1994-03-04 昭和電線電纜株式会社 コイル用ボビン
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
JP2009044853A (ja) * 2007-08-08 2009-02-26 Nsk Ltd 回転電動機のコイル機構
JP2012239347A (ja) * 2011-05-13 2012-12-06 Mitsubishi Electric Corp 回転電機およびそれに用いられるステータの製造方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5579525U (fr) * 1978-11-28 1980-05-31
JPH0617206U (ja) * 1992-07-29 1994-03-04 昭和電線電纜株式会社 コイル用ボビン
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
JP2009044853A (ja) * 2007-08-08 2009-02-26 Nsk Ltd 回転電動機のコイル機構
JP2012239347A (ja) * 2011-05-13 2012-12-06 Mitsubishi Electric Corp 回転電機およびそれに用いられるステータの製造方法

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