WO2024034364A1 - Bobine, stator et machine électrique tournante - Google Patents

Bobine, stator et machine électrique tournante Download PDF

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Publication number
WO2024034364A1
WO2024034364A1 PCT/JP2023/026856 JP2023026856W WO2024034364A1 WO 2024034364 A1 WO2024034364 A1 WO 2024034364A1 JP 2023026856 W JP2023026856 W JP 2023026856W WO 2024034364 A1 WO2024034364 A1 WO 2024034364A1
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WIPO (PCT)
Prior art keywords
turn
coil
insulating film
conducting wire
rectangular
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PCT/JP2023/026856
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English (en)
Japanese (ja)
Inventor
彰彦 渡辺
元輝 近藤
Original Assignee
パナソニックＩｐマネジメント株式会社
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Publication of WO2024034364A1 publication Critical patent/WO2024034364A1/fr

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/32—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

Definitions

  • the present disclosure relates to a coil, a stator, and a rotating electric machine, and particularly relates to a coil used as a winding coil of a stator in an electric motor.
  • Electric motors that converts electrical energy into mechanical energy is known as one type of rotating electric machine.
  • Electric motors are used in various products such as household equipment or industrial equipment.
  • electric motors are used in a wide variety of applications, including home appliances such as vacuum cleaners, automobiles, and robots.
  • Patent Document 1 discloses a rotating electrical machine that uses edgewise coils as stator winding coils.
  • rectangular conductive wires constituting coils such as edgewise coils are coated with an insulating film.
  • rectangular conductive wires are coated with a highly heat-resistant insulating film.
  • the insulating film coated on the edge portion of the rectangular conducting wire becomes thinner than the insulating film coated on the main surface of the rectangular conducting wire.
  • the insulating film breaks at the bent part where the inner diameter R is small, and the turn part There is a risk that problems such as short circuits may occur.
  • a wound coil is manufactured by performing edgewise bending while varying the width of the rectangular conducting wire for each turn, the insulating film is likely to break.
  • the present disclosure has been made to solve such problems, and provides a coil, a stator, and a coil that can be produced at low cost and with high quality by winding a rectangular conducting wire by edgewise bending.
  • the purpose is to provide rotating electrical machines, etc.
  • one aspect of the coil according to the present disclosure is a coil used in a rotating electric machine, which is formed by winding a rectangular conducting wire by edgewise bending or by connecting a plurality of rectangular conducting wires. a winding part in which turn parts are laminated, and an annular insulating film inserted between a first turn part and a second turn part, which are two adjacent turn parts in the plurality of turn parts. .
  • one aspect of the stator according to the present disclosure includes a stator core having a plurality of teeth, and a winding coil wound around each of the plurality of teeth, and the winding coil is the above-mentioned coil. .
  • one aspect of the rotating electric machine according to the present disclosure includes the stator described above and a rotor that rotates due to the magnetic force of the stator.
  • a coil formed by winding a rectangular conducting wire by edgewise bending can be manufactured at low cost and with high quality.
  • FIG. 1 is a sectional view of an electric motor according to an embodiment.
  • FIG. 2 is a perspective view of the coil block according to the embodiment.
  • FIG. 3 is an exploded view of the coil block according to the embodiment.
  • FIG. 4 is a cross-sectional view of the coil block taken along line IV-IV in FIG. 2.
  • FIG. 5 is a cross-sectional view of the coil block taken along line VV in FIG. 2.
  • FIG. 6 is a diagram showing an insulating film in a coil according to an embodiment.
  • FIG. 7 is a front view of the coil according to the embodiment.
  • FIG. 8 is a diagram illustrating an example of a method for manufacturing a coil according to an embodiment.
  • FIG. 9 is a diagram showing another example of the method for manufacturing the coil according to the embodiment.
  • FIG. 1 is a sectional view of an electric motor according to an embodiment.
  • FIG. 2 is a perspective view of the coil block according to the embodiment.
  • FIG. 3 is an exploded view of the coil
  • FIG. 10 is a diagram showing an insulating film in a coil according to Modification Example 1.
  • FIG. 11 is a front view of a coil according to modification example 1.
  • FIG. 12 is a cross-sectional view of a coil block according to modification 2.
  • FIG. 13 is a front view of a coil according to modification 3.
  • FIG. 14 is a perspective view of an insulating film in a coil according to modification example 4.
  • each figure is a schematic diagram and is not necessarily strictly illustrated.
  • symbol is attached to the substantially the same structure, and the overlapping description is omitted or simplified.
  • the radial direction of the stator 10 and rotor 20 is referred to as a "radial direction”, and the rotational direction of the rotor 20 is referred to as a "circumferential direction”.
  • the direction in which the rotating shaft 23 is centered around the axial center C and extends from the axial center C is the "radial direction”
  • the direction in which the rotating shaft 23 is centered around the axial center C and goes around the axial center C is the "circumferential direction”.
  • the "radial direction” is a direction perpendicular to the direction of the axis C of the rotating shaft 23.
  • the terms “upper” and “lower” do not necessarily refer to the upper direction (vertically upward) and the downward direction (vertically downward) in absolute spatial recognition.
  • FIG. 1 is a sectional view of an electric motor 1 according to an embodiment.
  • FIG. 1 shows a cross section taken along a plane perpendicular to the direction of the axis C of the rotating shaft 23 of the rotor 20.
  • the electric motor 1 includes a stator 10 and a rotor 20. Stator 10 and rotor 20 are arranged facing each other.
  • the electric motor 1 in this embodiment is an inner rotor type motor in which the rotor 20 is arranged inside the stator 10.
  • the electric motor 1 also includes parts such as a motor case and a bearing that pivotally supports the rotating shaft 23, but for the sake of convenience, illustration and description of these parts will be omitted.
  • stator 10 (stator) is arranged to face the rotor 20 with an air gap between the stator 10 and the rotor 20. A minute air gap exists between the surface of the rotor 20 and the surface of the stator 10.
  • stator 10 is arranged to surround rotor core 21 of rotor 20 .
  • the stator 10 generates magnetic force that acts on the rotor 20.
  • the stator 10 is configured to generate magnetic flux in the air gap surface between the stator 10 and the rotor core 21 of the rotor 20 .
  • the stator 10 is configured such that north poles and south poles are alternately generated in the air gap surface with the rotor core 21 in the circumferential direction.
  • the stator 10 includes a coil 12 and a stator core 11.
  • the coil 12 is a stator coil provided in the stator 10 as a winding coil.
  • the coil 12 is an armature winding of the stator 10 and is wound around the stator core 11. Specifically, the coil 12 is wound around each of the plurality of teeth 11a of the stator 10. Therefore, a plurality of coils 12 are used in the stator 10. Each of the plurality of coils 12 is wound around each of the plurality of teeth 11a.
  • the plurality of coils 12 are arranged at equal intervals along the circumferential direction so as to surround the rotor 20. Each coil 12 is housed in each slot 11c of the stator 10. The coil 12 is attached to the teeth 11a via an insulator (not shown in FIG. 1).
  • one coil block 100 is composed of one coil 12, one insulator 13, and one tooth 11a.
  • the electric motor 1 has a plurality of coil blocks 100. Specifically, in the electric motor 1 shown in FIG. 1, 18 coil blocks 100 are used. Each of the plurality of coil blocks 100 is fixed to the stator core 11 by fitting the teeth 11a of each coil block 100 into the yoke 11b. Note that detailed configurations of the coil block 100 and the coil 12 will be described later.
  • the stator core 11 is an iron core that becomes the core of the stator 10.
  • the stator core 11 includes a plurality of teeth 11a and an annular yoke 11b.
  • Each of the plurality of teeth 11a protrudes toward the axis C of the rotating shaft 23 of the rotor 20. Specifically, the plurality of teeth 11a are provided radially in a direction (radial direction) orthogonal to the axis C of the rotating shaft 23.
  • a slot 11c for arranging the coil 12 is formed between two adjacent teeth 11a. That is, the slot 11c of the stator 10 is an area between two adjacent teeth 11a. The plurality of teeth 11a are arranged at equal intervals along the circumferential direction while forming slots 11c between two adjacent teeth 11a. In this embodiment, the stator 10 has 18 teeth 11a, so the number of slots in the stator 10 is 18.
  • Each tooth 11a extends radially inward from the annular yoke 11b. That is, the yoke 11b is a back yoke formed on the outside of each tooth 11a. Each tooth 11a is fitted and fixed to a yoke 11b.
  • the yoke 11b may be divided into a plurality of parts, or may be configured as one piece. When the yoke 11b is divided into a plurality of parts, the yoke 11b is configured by connecting the plurality of divided circular arc yokes in an annular shape. For example, the yoke 11b can be configured by six equally divided circular arc yokes. In this case, three teeth 11a are fixed to one arcuate yoke at equal intervals.
  • the teeth 11a and the yoke 11b are each a laminate formed by laminating a plurality of electromagnetic steel sheets.
  • Each of the plurality of electromagnetic steel plates is, for example, a punched steel plate formed into a predetermined shape.
  • the teeth 11a and the yoke 11b may be bulk bodies made of a magnetic material.
  • Each of the plurality of teeth 11a is a magnetic pole tooth, and generates magnetic force when the coil 12 is energized.
  • the plurality of coils 12 in the stator 10 are electrically connected as three-phase windings so that the rotor 20 rotates as a three-phase synchronous motor.
  • the plurality of coils 12 are configured by unit coils for each of three phases, U-phase, V-phase, and W-phase, which are electrically different in phase by 120 degrees from each other. That is, the coil 12 attached to each tooth 11a is energized and driven by three-phase alternating current that is energized in units of U phase, V phase, and W phase. Thereby, main magnetic flux for rotating the rotor 20 is generated in each tooth 11a.
  • the rotor 20 (rotor) is rotated by the magnetic force of the stator 10.
  • the rotor 20 also generates magnetic force.
  • the rotor 20 has a configuration in which a plurality of N poles and S poles that generate magnetic flux are alternately and repeatedly present in the circumferential direction. Thereby, the rotor 20 generates a magnetic force that acts on the stator 10.
  • the direction of the magnetic flux generated from the rotor 20 is a direction perpendicular to the direction of the axis C of the rotating shaft 23 (axial center direction). That is, the direction of the magnetic flux generated by the rotor 20 is the radial direction.
  • the rotor 20 has a rotor core 21, a plurality of permanent magnets 22, and a rotating shaft 23.
  • the rotor 20 rotates about the axis C of the rotating shaft 23 as a rotation center. That is, the rotating shaft 23 becomes the center of rotation of the rotor 20.
  • the rotor 20 is an embedded permanent magnet rotor (IPM rotor) in which a permanent magnet 22 is embedded in a rotor core 21. Therefore, electric motor 1 in this embodiment is an IPM motor.
  • IPM rotor embedded permanent magnet rotor
  • the rotor core 21 is an iron core that becomes the core of the rotor 20.
  • the rotor core 21 is a laminate in which a plurality of electromagnetic steel sheets are laminated in the direction of the axis C of the rotating shaft 23 (axial direction).
  • Each of the plurality of electromagnetic steel plates is, for example, a punched steel plate formed into a predetermined shape.
  • the plurality of electromagnetic steel plates are fixed to each other by caulking, for example.
  • the rotor core 21 is not limited to a laminate of a plurality of electromagnetic steel plates, but may be a bulk body made of a magnetic material.
  • the permanent magnet 22 is arranged in a magnet insertion hole provided in the rotor core 21.
  • ten magnet insertion holes are provided in the rotor core 21, and a plate-shaped permanent magnet 22 is inserted into each magnet insertion hole.
  • permanent magnet 22 is a sintered magnet. Note that the permanent magnet 22 may be a bonded magnet.
  • the rotating shaft 23 is an elongated shaft, for example, a metal rod.
  • the rotating shaft 23 is fixed to the rotor core 21. Specifically, the rotating shaft 23 is inserted into a through hole provided at the center of the rotor core 21 and fixed to the rotor core 21 so as to extend on both sides of the rotor core 21 in the direction of the axis C.
  • the rotating shaft 23 is fixed to the rotor core 21 by, for example, press-fitting or shrink-fitting into a through hole of the rotor core 21.
  • one of the parts of the rotating shaft 23 that protrudes from the rotor core 21 functions as an output shaft.
  • a load such as a rotating fan is attached to the rotating shaft 23.
  • the rotating shaft 23 is rotatably supported by a bearing such as a bearing.
  • the electric motor 1 configured as described above, when the coil 12 of the stator 10 is energized, a field current flows through the coil 12 and a magnetic field is generated in the stator 10. As a result, magnetic flux directed from the stator 10 toward the rotor 20 is generated. Specifically, magnetic flux directed toward the rotor 20 is generated from each of the teeth 11a of the stator core 11 of the stator 10. On the other hand, in the rotor 20, a magnetic flux passing through the stator 10 is generated by the permanent magnet 22 arranged in the rotor core 21. The magnetic force generated by the interaction between the magnetic flux generated by the stator 10 and the magnetic flux generated from the permanent magnets 22 of the rotor 20 becomes a torque that rotates the rotor 20, and the rotor 20 rotates.
  • FIG. 2 is a perspective view of the coil block 100 according to the embodiment
  • FIG. 3 is an exploded view of the coil block 100
  • 4 is a cross-sectional view of the coil block 100 taken along the line IV--IV in FIG. 2
  • FIG. 5 is a cross-sectional view of the coil block 100 taken along the line V-V in FIG. 2
  • FIG. It is a figure which shows the insulating film 12b in the coil 12 which concerns
  • FIG. 7 is a front view of the coil 12 which concerns on embodiment.
  • the coil block 100 includes a coil 12, an insulator 13, and teeth 11a.
  • the coil 12 is attached to the teeth 11a via an insulator 13.
  • the insulator 13 is interposed between the coil 12 and the teeth 11a, as shown in FIGS. 2 to 5.
  • the insulator 13 is a cylindrical insulating frame that covers the teeth 11a.
  • the insulator 13 is made of an insulating resin material such as polybutylene terephthalate (PBT).
  • PBT polybutylene terephthalate
  • the insulator 13 is separated into a first frame 13a and a second frame 13b, and after the coil 12 is attached to the cylindrical portion of the first frame 13a, the second frame 13b is attached to the second frame 13b.
  • the coil 12 can be attached to the insulator 13 by fitting it into the cylindrical portion of the frame 13a.
  • the coil block 100 can be manufactured by inserting the teeth 11a into the cylindrical portion of the insulator 13 to which the coil 12 is attached.
  • the coil 12 includes a winding portion 12a formed by winding a plate-shaped conductor, and an insulating film 12b inserted into the winding portion 12a.
  • the coil 12 is an irregularly shaped coil, and a flat rectangular conducting wire is used as the plate-shaped conductor that constitutes the winding portion 12a.
  • the winding portion 12a in this embodiment is a winding portion having a structure in which a plurality of turn portions are stacked by winding a rectangular conducting wire by edgewise bending. In other words, the coil 12 is an edgewise coil.
  • the coil 12 in this embodiment is a high-density molded coil. By using the coil 12 configured in this way, a higher space factor can be obtained compared to a round wire coil configured with a round wire. For example, the space factor of the coil 12 in this embodiment is 90% or more.
  • the winding part 12a has a rectangular flat conductor wire that constitutes the first turn at the beginning of winding as a winding start turn part, and a rectangular flat conductor wire that constitutes the n-th turn (n is an integer of 2 or more) at the end of winding. Assuming that this is the winding end turn part, the structure is such that n turn parts from the first turn to the nth turn are stacked.
  • the winding portion 12a is formed by winding a rectangular conductive wire having a constant thickness so that each turn has a substantially rectangular shape. is formed into a substantially rectangular frame shape. Therefore, when the winding part 12a is viewed from the stacking direction of the plurality of turn parts, the shape of the winding part 12a is a substantially rectangular frame shape.
  • the winding portion 12a made of n turns of rectangular conducting wire from the first turn to the nth turn is formed into a substantially rectangular frame shape having four sides when viewed from the radial direction of the stator 10.
  • the width of the rectangular conducting wire differs depending on the turn portion.
  • the winding portion 12a is formed such that the width of the rectangular conducting wire gradually increases or decreases from the first turn to the nth turn.
  • the rectangular conductive wire is spirally wound so that the plurality of turn parts in the winding part 12a have the same inner diameter and gradually increase the outer diameter.
  • the turn portion with the smallest external dimension is located on the tip side of the teeth 11a, and the turn portion with the largest external dimension is located on the root side of the teeth 11a (on the yoke 11b side). It is arranged like this.
  • the turn part with the smallest external dimension may be the start turn part, and the turn part with the largest external dimension may be the end turn part, or the turn part with the smallest external dimension may be the end turn part, and the turn part with the smallest external dimension may be the end turn part.
  • the largest turn portion may be used as the starting turn portion.
  • the widths of the rectangular conducting wires in all the turn parts in the winding part 12a may be made the same.
  • a metal plate whose main component is a low-resistance metal material such as copper or aluminum can be used as the rectangular conducting wire constituting the winding portion 12a.
  • a metal plate made of a copper alloy is used as the rectangular conductive wire constituting the winding portion 12a.
  • the surface of the rectangular conducting wire constituting the winding portion 12a is not coated with an insulating film.
  • the surface of the rectangular conducting wire constituting the winding portion 12a is an exposed surface.
  • the surface of the metal plate constituting the winding portion 12a is exposed.
  • an insulating film 12b is inserted into the winding part 12a in order to insulate the rectangular conductive wires of two adjacent turn parts in the winding part 12a.
  • two adjacent turns in the plurality of turns in the winding portion 12a are defined as a first turn (k turn) and a second turn (k+1 turn)
  • the results are shown in FIGS. 4 and 5.
  • the insulating film 12b is inserted between the first turn section and the second turn section.
  • the insulating film 12b may be in contact with either one of the main surfaces of the mutually opposing flat conductive wire of the first turn portion and the second turn portion, which are two adjacent turn portions.
  • the insulating film 12b is in contact with each of the main surfaces of the flat conductive wire facing each other in the first turn part and the second turn part.
  • the insulating film 12b is in contact with the main surface of the rectangular conducting wire constituting the first turn, which is one of the two adjacent turns, and also contacts the second turn, which is the other of the two adjacent turns. It is in contact with the main surface of the constituent rectangular conducting wire. Note that the width of the rectangular conducting wire constituting the first turn portion is different from the width of the rectangular conducting wire constituting the second turn portion.
  • the outer end surface (outer side surface) of the rectangular conducting wire constituting the winding portion 12a is not covered with the insulating film 12b and is exposed. That is, in each turn portion of the winding portion 12a, the outer end surface of the rectangular conducting wire is exposed to the outside air.
  • the inner end surface (inner side surface) of the rectangular conducting wire constituting the winding portion 12a is not covered with the insulating film 12b, similarly to the outer end surface of the rectangular conducting wire. Therefore, in this embodiment, the insulating film 12b is in contact with only the main surface of the main surface and end surface of the rectangular conducting wire that constitutes the winding portion 12a. In this embodiment, the insulating film 12b is in contact with the entire main surface of the rectangular conducting wire that constitutes the winding portion 12a. In this way, since the inner end surface of the rectangular conducting wire constituting the winding portion 12a is not covered with the insulating film 12b, the insulating film 12b is not present in the portion of the coil 12 that contacts the insulator 13. Specifically, the insulating film 12b is not in contact with the entire surface of the insulator 13. Therefore, the inner end surface of the rectangular conducting wire constituting the winding portion 12 a is in contact with the insulator 13 .
  • the insulating film 12b is provided for each turn of the winding portion 12a.
  • the coil 12 includes a plurality of insulating films 12b separated from each other.
  • the coil 12 has a structure in which one turn part made of a rectangular conductive wire and one insulating film 12b are laminated alternately.
  • each insulating film 12b is annular. Specifically, each insulating film 12b has a substantially rectangular ring shape. In this case, each of the plurality of insulating films 12b has the same inner diameter, similar to the plurality of turn parts of the winding part 12a. On the other hand, the outer diameter of the plurality of insulating films 12b gradually increases, similar to the plurality of turn parts of the winding part 12a. Therefore, the plurality of insulating films 12b have different widths depending on the turn portions of the winding portion 12a.
  • the insulating film 12b is a thin insulating member in the form of a film or sheet.
  • the thickness of the insulating film 12b is constant, for example, 20 ⁇ m to 50 ⁇ m.
  • a resin material such as polyphenylene sulfide (PPS), polyethylene naphthalate (PEN), or polyethylene terephthalate (PET) can be used.
  • each insulating film 12b has a cutout portion 12b1.
  • the notch portion 12b1 is a cut portion where the annular insulating film 12b is cut at one location. In this way, each insulating film 12b does not have a continuous closed annular shape.
  • the cutout portion 12b1 of the insulating film 12b is a portion through which a rectangular conducting wire forming each of the plurality of turn portions of the winding portion 12a passes.
  • the insulating films 12b overlap at the cutout portion 12b1. That is, one end of the insulating film 12b at the notch 12b1 and the other end of the insulating film 12b at the notch 12b1 preferably overlap when viewed from the radial direction of the stator 10.
  • the notches 12b1 of the plurality of insulating films 12b are formed when viewed from the lamination method of the plurality of turns (that is, when viewed from the radial direction of the stator 10). ), preferably present at different positions in two adjacent turn parts.
  • the winding portion 12a can be produced by spirally winding a rectangular conducting wire 12M having a constant thickness so that each turn portion is rectangular.
  • a rectangular conductive wire having a constant thickness and width is rolled at a predetermined portion and wound into a rectangular spiral while changing the width for each turn, and an insulating film 12b having a different width for each turn.
  • the coil 12 can be manufactured by sequentially sandwiching the two.
  • a rectangular conducting wire that has been preformed with different widths along the way is bent at a predetermined position and wound into a rectangular spiral to form multiple turns, and each turn is covered with an insulating film.
  • the coil 12 may be manufactured by sandwiching the coil 12b.
  • the rectangular conducting wire 12M and the insulating film 12b of each turn part of the winding part 12a can be joined by thermocompression bonding or ultrasonic waves for each turn part after edgewise bending.
  • the rectangular conducting wire 12M and the insulating film 12b may be joined intermittently in a pot shape, or may be joined continuously. In this way, by joining the rectangular conducting wire 12M and the insulating film 12b after edgewise bending, it is possible to suppress wrinkles or misalignment of the insulating film 12b.
  • a part of the insulating film 12b (for example, a part that does not come in contact with a bending jig for bending the flat conductor 12M) is joined to the flat conductor 12M before edgewise bending, and another part (a part that the bending jig contacts) After edgewise bending the part), it may be joined to the rectangular conducting wire 12M. Thereby, it is possible to further suppress wrinkles and positional deviations in the insulating film 12b.
  • FIG. 9 shows a state in which the winding portion 12a is stretched and the insulating film 12b is inserted only at three locations between the turn portions.
  • an insulating tape having an adhesive layer is used as the insulating film 12b, and the insulating tape is bonded to the rectangular conductor 12M, so that the insulating film 12b is bonded by the adhesive layer. It may be fixed to the rectangular conducting wire 12M. Alternatively, the insulating film 12b may be fixed to the rectangular conducting wire 12M with varnish. Note that the method of fixing the insulating film 12b using an insulating tape or varnish may be used when joining the rectangular conducting wire 12M and the insulating film 12b at each turn portion.
  • the rectangular conducting wire between each turn in the winding part 12a is insulated and separated by inserting the insulating film 12b into each turn of the winding part 12a. . Therefore, the current supplied to the coil 12 is applied to the rectangular conductive wire formed in a spiral shape from the first turn of the first turn to the end of the nth turn, or from the last turn to the first turn of the winding. It will flow along.
  • the coil 12 has a winding part 12a in which a plurality of turn parts are stacked by winding a rectangular conducting wire by edgewise bending, and two adjacent turn parts in the plurality of turn parts. It includes an annular insulating film 12b inserted between a first turn part (kth turn part) and a second turn part ((k+1)th turn part).
  • an inexpensive insulating film 12b made of resin is used to insulate and separate the rectangular conductive wires of two adjacent turn portions. This eliminates the need for the step of coating the rectangular conductive wire with an insulating film, so the coil 12 can be manufactured at a lower cost than when a coil is manufactured using a rectangular conductive wire coated with an insulating film.
  • the insulating film may break at the bending part, resulting in a short circuit between the turn parts, but in this embodiment, the insulating film is Since the film is not coated, the insulating film will not break and short circuit between the turn parts will not occur. Thereby, the coil 12 having desired electrical performance can be manufactured, and thus the coil 12 of high quality can be obtained.
  • the coil 12 formed by winding the rectangular conducting wire by edgewise bending can be manufactured at low cost and with high quality.
  • the insulating film 12b is formed on the main surface of the rectangular conducting wire constituting the first turn portion, which is one of the two adjacent turn portions, and on the other of the two adjacent turn portions. It is in contact with each of the main surfaces of the rectangular conducting wire constituting a certain second turn portion. That is, one insulating film 12b is inserted between the first turn part and the second turn part.
  • the coil 12 can be manufactured at low cost.
  • the width of the rectangular conducting wire constituting the first turn portion which is one of the two adjacent turn portions, and the second turn portion, which is the other of the two adjacent turn portions.
  • the widths of the rectangular conducting wires that constitute the wires are different.
  • the insulating film 12b is provided for each turn of the winding portion 12a.
  • the insulating film 12b can be easily inserted between the rectangular conductive wires of two adjacent turn parts in the winding part 12a.
  • the insulating film 12b has a cutout portion 12b1 through which a rectangular conducting wire forming each of the plurality of turn portions in the winding portion 12a passes.
  • the insulating film 12b can be easily inserted between two adjacent turn portions.
  • the insulating films 12b preferably overlap at the cutout portions 12b1.
  • the cutout portions 12b1 of the plurality of insulating films 12 are located at different positions in two adjacent turn portions when viewed from the lamination method of the plurality of turn portions. Good to have.
  • the insulation of the coil 12 can be improved. Further, as described above, when the insulating films 12b are configured to overlap at the cutout portions 12b1, the presence of the cutout portions 12b1 at different positions in two adjacent turn portions improves the insulation. The presence of the overlapping portion of the film 12b can effectively prevent the entire coil 12 from increasing in size.
  • the inner diameter dimensions of each of the plurality of insulating films 12b are the same.
  • the coil 12 having an inner shape that follows the outer shape of the teeth 11a can be easily manufactured.
  • the outer diameter of the plurality of insulating films 12b gradually increases.
  • the coil 12 is used as a winding coil of the stator 10.
  • the stator 10 includes a stator core 11 having a plurality of teeth 11a, and a coil 12 each wound around each of the plurality of teeth 11a.
  • the stator 10 including the coil 12 can be manufactured by attaching the coil block 100, in which the coil 12 is attached to the teeth 11a via the insulator 13, to the yoke 11b. In this way, since the winding step is not necessary, it is possible to suppress the positional shift of the coil 12.
  • notch 12b1 is formed in one insulating film 12b, but the present invention is not limited to this.
  • two notches 12b1 may be formed in the insulating film 12bA, and the insulating film 12bA may be divided into two film pieces each having a substantially L-shape.
  • the coil 12A shown in FIG. 11 can be manufactured by inserting the insulating film 12bA shown in FIG. 10 between two adjacent turn parts in the winding part 12a. In this way, by using the insulating film 12bA divided into two parts, even if the rectangular conductive wire constituting the winding part 12a is spirally wound, the insulating film 12bA can be separated between two adjacent turn parts. can be easily inserted.
  • the plurality of insulating films 12b in the coil 12 have different widths for each turn, but the width is not limited to this.
  • the plurality of insulating films 12bB in the coil 12B may have the same width.
  • the insulating film 12bB covers the main surface of the rectangular conducting wire constituting the first turn portion, which is one of the two adjacent turn portions, and the second turn portion, which is the other of the two adjacent turn portions. It is in contact with a portion of each of the main surfaces of the rectangular conducting wires.
  • the insulating film 12bB is not present in the gap between the main surface of the rectangular conducting wire constituting the first turn portion and the main surface of the rectangular conducting wire constituting the second turn portion, and in this portion, There is an intervening air layer.
  • the rectangular conductive wires of two adjacent turn portions are air-insulated from each other. In this way, by making the widths of the plurality of insulating films 12bB the same, the coil 12B can be manufactured at even lower cost.
  • the insulating film 12b does not protrude from the corner of the rectangular conducting wire that constitutes the turn portion of the winding portion 12a, but the present invention is not limited to this.
  • the insulating film 12bC protrudes from each corner of at least the rectangular conducting wire constituting the first turn portion and the rectangular conducting wire constituting the second turn portion. may be formed. Since the corners of the winding part 12a are prone to electric current concentration and dielectric breakdown, as shown in FIG. Even if the outer end face of the rectangular conducting wire at the corner of 12a is exposed, it is possible to effectively prevent dielectric breakdown from occurring. In other words, it is possible to eliminate the need for insulation measures for the outer end surfaces of the flat conductive wires at the corners of the winding portion 12a.
  • the inner end surface of the rectangular conducting wire constituting the winding portion 12a is not covered with the insulating film 12b, but the present invention is not limited to this.
  • an insulating film 12bD having a bent portion 12b2 may be used by bending the inner part of the insulating film 12bD so as to stand up. This bent portion 12b2 is bent so as to face the inner end surface of the rectangular conductive wire forming one of the first turn portion and the second turn portion, which are two adjacent turn portions in the winding portion 12a.
  • the insulating film 12bD configured in this manner, it is possible to protect the inner edge portion of the rectangular conductive wire that constitutes the winding portion 12a.
  • the plurality of insulating films 12b inserted into each turn of the winding portion 12a of the coil 12 are not connected, but the present invention is not limited to this.
  • the insulating film 12b inserted into each turn of the winding portion 12a of the coil 12 may be connected at a portion.
  • the winding portion 12a is formed by laminating a plurality of turn portions by winding a rectangular conducting wire by edgewise bending, but the present invention is not limited to this.
  • the winding portion 12a may be formed by laminating a plurality of turn portions by connecting a plurality of rectangular conducting wires.
  • the number of slots in the stator 10 is 18, but the number is not limited to this.
  • the number of magnetic poles of the rotor 20 is 10 (that is, the number of permanent magnets 22 is 10), but the present invention is not limited to this. Any number of slots in the stator 10 and any number of magnetic poles in the rotor 20 can be used.
  • the rotor 20 is an IPM rotor, but the rotor 20 is not limited to this.
  • a surface magnet type rotor SPM rotor in which a plurality of permanent magnets are provided on the outer surface of the rotor core may be used.
  • the electric motor 1 is illustrated as an example of the rotating electric machine, but the present invention is not limited to this.
  • the rotating electric machine using the coil 12 may be a generator.
  • the coil 12 is used as a wire-wound coil included in the stator 10, the coil 12 is not limited to this, and may be used as various coils included in products other than the stator.
  • present disclosure also includes forms in which: Further, the present disclosure also includes arbitrary combinations of one or more constituent elements in each of the plurality of claims recited in the claims as filed.
  • the dependent form claims stated in the scope of claims at the time of filing of the present application are made into multiple claims or multiple multi-claims so as to cite any plurality of claims (for example, the superordinate claim for each claim)
  • all claims are referred to as a multiple claim or multiple multiple claims
  • all forms obtained by combining all claims included in the multiple claim or multiple multiple claims are also included in the present disclosure.
  • the technology of the present disclosure can be widely used in various products using coils, including rotating electric machines such as electric motors.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacture Of Motors, Generators (AREA)

Abstract

L'invention concerne une bobine (12) utilisée pour une machine électrique tournante comprenant: une partie enroulée (12a) dans laquelle une pluralité de parties de spire sont stratifiées par enroulement d'un fil conducteur plat par pliage sur chant ou la connexion d'une pluralité de fils conducteurs plats; et un film isolant annulaire (12b) inséré dans un espace entre une première partie de spire et une seconde partie de spire qui sont deux parties de spire adjacentes parmi la pluralité de parties de spire.
PCT/JP2023/026856 2022-08-12 2023-07-21 Bobine, stator et machine électrique tournante WO2024034364A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2022128620 2022-08-12
JP2022-128620 2022-08-12

Publications (1)

Publication Number Publication Date
WO2024034364A1 true WO2024034364A1 (fr) 2024-02-15

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Application Number Title Priority Date Filing Date
PCT/JP2023/026856 WO2024034364A1 (fr) 2022-08-12 2023-07-21 Bobine, stator et machine électrique tournante

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Country Link
WO (1) WO2024034364A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001292548A (ja) * 2000-01-31 2001-10-19 Hitachi Ltd 回転電機の固定子
WO2018190124A1 (fr) * 2017-04-13 2018-10-18 パナソニックＩｐマネジメント株式会社 Bobine et moteur l'utilisant

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001292548A (ja) * 2000-01-31 2001-10-19 Hitachi Ltd 回転電機の固定子
WO2018190124A1 (fr) * 2017-04-13 2018-10-18 パナソニックＩｐマネジメント株式会社 Bobine et moteur l'utilisant

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