WO2023062868A9 - 回転電機および産業機械 - Google Patents
回転電機および産業機械 Download PDFInfo
- Publication number
- WO2023062868A9 WO2023062868A9 PCT/JP2022/022678 JP2022022678W WO2023062868A9 WO 2023062868 A9 WO2023062868 A9 WO 2023062868A9 JP 2022022678 W JP2022022678 W JP 2022022678W WO 2023062868 A9 WO2023062868 A9 WO 2023062868A9
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- WO
- WIPO (PCT)
- Prior art keywords
- rotating electric
- electric machine
- bobbin
- stator core
- back yoke
- Prior art date
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- 229920005989 resin Polymers 0.000 claims abstract description 115
- 239000011347 resin Substances 0.000 claims abstract description 115
- 239000004020 conductor Substances 0.000 claims description 10
- 239000007788 liquid Substances 0.000 description 55
- 238000000465 moulding Methods 0.000 description 30
- 230000003313 weakening effect Effects 0.000 description 18
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 11
- 238000000034 method Methods 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 10
- 230000000694 effects Effects 0.000 description 7
- 238000004804 winding Methods 0.000 description 7
- 238000003780 insertion Methods 0.000 description 6
- 230000037431 insertion Effects 0.000 description 6
- 230000007547 defect Effects 0.000 description 5
- 230000004907 flux Effects 0.000 description 5
- 229910052742 iron Inorganic materials 0.000 description 5
- 238000003825 pressing Methods 0.000 description 5
- 230000003247 decreasing effect Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229920000106 Liquid crystal polymer Polymers 0.000 description 2
- 239000004977 Liquid-crystal polymers (LCPs) Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000005300 metallic glass Substances 0.000 description 2
- 229920001187 thermosetting polymer Polymers 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000001846 repelling effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 238000001721 transfer moulding Methods 0.000 description 1
- 229920006305 unsaturated polyester Polymers 0.000 description 1
- 239000002966 varnish Substances 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Images
Classifications
-
- 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
- H02K3/52—Fastening salient pole windings or connections thereto
- H02K3/521—Fastening salient pole windings or connections thereto applicable to stators only
- H02K3/522—Fastening salient pole windings or connections thereto applicable to stators only for generally annular cores with salient poles
Definitions
- the present invention relates to rotating electric machines and industrial machines.
- a problem with rotating electric machines using this rectangular wire is that the coil ends become high when the coils are wound in a distributed manner.
- a rotating electric machine has been disclosed in which rectangular wires divided into predetermined segments are connected inside and outside slots of a stator core, and the coil ends are lowered (for example, Patent Document 1).
- connection part where the rectangular wire is connected may be weakened by Lorentz force, vibration, temperature changes, etc. Therefore, the inventor came up with the idea of integrating the stator core and the coil with resin to suppress the weakening of the electrical connection at the connection part, and created a prototype. However, it has been discovered that during the resin molding process, resin may enter between the stator core and the bobbin and press the bobbin, deforming the coil within the bobbin and weakening the electrical connection at the connection part. Ta.
- An object of the present invention is to provide a rotating electrical machine that can suppress resin from entering between the stator core and the bobbin during resin molding.
- the invention includes a rotor, a stator core having a slot with an opening on the rotor side, a bobbin that is fitted into the slot and into which a coil is inserted, and a stator core with a slot provided on the opening side of the bobbin. and a resin for fixing the stator core, the coil, and the bobbin.
- FIG. 1 is an external perspective view of a rotating electric machine according to a first embodiment of the present invention.
- 1 is a perspective view of a stator and a rotor disposed within the stator according to a first embodiment of the present invention.
- FIG. FIG. 3 is a perspective view of the stator shown in FIG. 2 with resin removed.
- FIG. 2 is a partially enlarged plan view of the stator core according to the first embodiment of the present invention.
- FIG. 1 is an external perspective view of a bobbin according to a first embodiment of the present invention.
- FIG. 1 is a partially sectional perspective view of a stator in which a bobbin according to a first embodiment of the present invention is installed in a slot of a stator core.
- 6 is a sectional view taken along the line AA in FIG. 5.
- FIG. FIG. 3 is an enlarged perspective view of the upper end of the bobbin according to the first embodiment of the present invention.
- 1 is a cross-sectional perspective view of a stator in which a bobbin according to a first embodiment of the present invention is mounted on a stator core and a coil is wound thereon; FIG. FIG.
- FIG. 3 is an enlarged perspective view showing the shape of one end of two segment conductors according to the first embodiment of the present invention, and the state before (left side) and after (right side) connection of the two segment conductors.
- FIG. 1 is a cross-sectional view of a mold used for resin molding of a stator according to a first embodiment of the present invention, and a stator installed in the mold. 12 is a partial cross-sectional view taken along the line AA in FIG. 11.
- FIG. FIG. 3 is an enlarged perspective view of the upper end of a bobbin according to a comparative example of the present invention.
- FIG. 3 is a cross-sectional view of a mold used for resin molding of a stator according to a comparative example of the present invention, and a stator installed in the mold.
- 17 is an enlarged view of section A in FIG. 16.
- FIG. FIG. 7 is a cross-sectional view of a stator that schematically shows the pressure applied to the connection portion of the coil when liquid resin enters between the back yoke and the bobbin of the stator according to a comparative example of the present invention.
- 12 is an enlarged view of section B in FIG. 11.
- FIG. FIG. 7 is an enlarged perspective view of the upper end of a bobbin according to a second embodiment of the present invention.
- FIG. 7 is a partial plan view of a stator in which a bobbin according to a second embodiment of the present invention is installed in a slot of a stator core.
- FIG. 7 is an external perspective view of a bobbin according to a third embodiment of the present invention.
- FIG. 7 is a partial plan view of a stator in which a bobbin according to a third embodiment of the present invention is installed in a slot of a stator core.
- FIG. 7 is an enlarged perspective view of the upper end of a bobbin according to a fourth embodiment of the present invention.
- FIG. 7 is an enlarged perspective view of the upper end of a bobbin according to a fifth embodiment of the present invention.
- FIG. 7 is a partial plan view of a stator in which a bobbin according to a fifth embodiment of the present invention is installed in a slot of a stator core.
- FIG. 7 is an external perspective view of a bobbin according to a sixth embodiment of the present invention. It is a sectional view showing a state where a stator using a bobbin according to a sixth embodiment of the present invention is installed in a mold. 27 is an enlarged view of section A in FIG. 26.
- FIG. FIG. 7 is a partial plan view of a stator according to a sixth embodiment of the present invention.
- FIG. 7 is a partially enlarged plan view of a stator in which a bobbin is attached to a stator core according to another embodiment of the present invention.
- FIG. 1 is an external perspective view of a rotating electrical machine 1000 according to a first embodiment of the present invention.
- the rotating electrical machine 1000 is an electric motor that rotates a rotor by attracting and repelling a DC magnetic field generated by a permanent magnet in a rotor and a rotating magnetic field emitted from a coil, such as a radial gap type electric motor used as a power source for a compressor. It is.
- the rotating electrical machine 1000 includes a cylindrical housing 500, disc-shaped end brackets 400 provided at both ends of the housing 500, and a shaft 300 protruding from the center of one of the end brackets 400.
- FIG. 2 is a perspective view of the stator 100 of the rotating electrical machine 1000 and the rotor 200 disposed within the stator 100 according to the present embodiment. That is, FIG. 2 shows the internal structure of the rotating electric machine 1000 with the housing 500, end bracket 400, and shaft 300 removed from FIG.
- Rotating electric machine 1000 includes an annular stator 100 and a rotor 200 disposed inside stator 100.
- the stator 100 includes a stator core 110 and cylindrical resin 160 provided on both sides of the stator core 110 in the axial direction.
- the outer periphery of stator core 110 is fixed to housing 500 shown in FIG.
- the rotor 200 is composed of a cylindrical rotor core 220 and a plurality of permanent magnets 210 arranged circumferentially within the rotor core 220.
- a shaft 300 shown in FIG. 1 is provided on the central axis of the rotor 200, and is rotatably fixed to an end bracket 400 via a bearing (not shown).
- FIG. 3 is a perspective view of the stator 100 shown in FIG. 2 with the resin 160 removed.
- the stator 100 before resin molding has a stator core 110, a coil 140, and a bobbin 150, and a coil 140 (for example, a rectangular wire) is wound around the stator core 110 via the bobbin 150.
- a coil 140 for example, a rectangular wire
- wave winding distributed winding
- FIG. 4 is a partially enlarged plan view of the stator core 110 according to the present embodiment.
- Stator core 110 includes an annular back yoke 130 and a plurality of teeth 120 that protrude from the inner peripheral surface of back yoke 130 toward rotor 200 and are arranged at equal intervals in the circumferential direction.
- the back yoke 130 is a cylindrical body made of stacked thin disks, and has a plurality of recesses 131 in an inner wall 132 that fit with one end of the teeth 120.
- the thin disk can be produced, for example, by punching out an electromagnetic steel plate by press working.
- the teeth 120 are columnar bodies made of laminated trapezoidal thin plates, and the bottom end portions 121 of the teeth 120 fit into the recesses 131 of the back yoke 130 and are coupled to the back yoke 130.
- a trapezoidal thin plate can be produced, for example, by processing a thin plate of iron-based amorphous metal.
- stator core 110 is sandwiched between the inner wall 132 of the back yoke 130 and the side walls 122 of two adjacent teeth 120 in the circumferential direction of the stator core 110, and has a plurality of slots 111 with openings 112 provided on the rotor 200 side. .
- FIG. 5 is an external perspective view of the bobbin 150 according to the present embodiment.
- Bobbin 150 is a component that insulates coil 140 and stator core 110.
- the bobbin 150 has a plurality of coil insertion holes 154 (described later) into which the coil 140 is inserted, and is fitted into the slot 111.
- a resin such as liquid crystal polymer (LCP), which has high strength, is suitable for thin-wall molding, and has high heat resistance, can be used.
- LCP liquid crystal polymer
- the bobbin 150 is provided with a cylindrical portion 151, a convex portion 152, and a collar portion 153.
- FIG. 6 is a partially sectional perspective view of the stator 100 in which the bobbin 150 according to the present embodiment is installed in the slot 111 of the stator core 110.
- the cylindrical portion 151 is a portion fitted into the slot 111, and has three side walls facing the inner wall of the slot 111 and one side wall facing the opening 112 of the slot 111.
- the cylindrical portion 151 includes a first side wall 151a along the inner wall 132 of the back yoke 130, two second side walls 151b along the side walls 122 of two adjacent teeth 120 in the circumferential direction of the stator core 110, and an opening. 112 (see FIGS. 4 and 5).
- the convex portion 152 is a portion that protrudes from the third side wall 151c toward the rotor side (inward in the stator radial direction), and in this embodiment, is a protrusion that extends from one end of the slot 111 in the axial direction to the other end. .
- the flange portion 153 is provided at one end of the axial direction of the cylindrical portion 151, and the gap formed between the slot 111 and the cylindrical portion 151 is connected to the end surface of the stator core 110 in the axial direction (hereinafter referred to as a core end surface). ) is the part that is covered from the side.
- the flange portion 153 includes a back yoke side portion 153a that covers a part of the axial end surface of the back yoke 130 located on the radially outer side of the slot 111, and two teeth 120 that sandwich the slot 111 from the circumferential direction. It has two teeth side portions 153b that cover a portion of each end face in the axial direction.
- a flange portion 153 is provided at one end of the cylindrical portion 151 in the axial direction.
- the flange portions 153 may be provided at both ends of the cylindrical portion 151 in the axial direction.
- FIG. 7 is a cross-sectional view taken along the line AA in FIG. 5. As shown in FIG. 7, the length d2 that the back yoke side portion 153a extends from the cylindrical portion 151 in the radial direction of the stator core 110 is the same as the length d2 that each of the two teeth side portions 153b extends from the cylindrical portion 151 in the circumferential direction of the stator core 110. longer than the length d1.
- the axial position of the stator core 110 is determined by the flange 153 of the bobbin 150 installed in the slot 111 coming into contact with the stator core 110.
- the gap between the slot 111 and the cylindrical portion 151 is covered by the flange portion 153 from the outside in the axial direction of the stator core 110.
- FIG. 8 is an enlarged perspective view of the upper end of the bobbin 150 according to the present embodiment. As shown in FIG. 8, a plurality (six in this embodiment) of coil insertion holes 154 are provided at the upper end of the bobbin 150 for inserting the coil 140 (in this embodiment, a rectangular wire).
- the coil insertion hole 154 reaches the lower end of the bobbin 150 and passes through the bobbin 150. Therefore, a plurality of (six in this embodiment) coil insertion holes 154 are provided inside the cylindrical portion 151. In this embodiment, since a rectangular wire is used for the coil 140, the coil insertion hole 154 has a substantially rectangular cross-sectional shape.
- the back yoke side portion 153a of the collar portion 153 has a slope 155 on the outside in the axial direction.
- the slope 155 has an upward slope from the outside to the inside in the radial direction of the stator core 110 when the bobbin 150 is installed in the slot 111.
- FIG. 9 is a cross-sectional perspective view of a stator 100 in which a coil 140 is wound around a stator core 110 to which a bobbin 150 according to the present embodiment is attached.
- the coil 140 has a connecting portion 141 within the bobbin 150. That is, the coil 140 has a first rectangular wire 142 and a second rectangular wire 143 (a plurality of segment conductors), and the first rectangular wire 142 and the second rectangular wire 143 are attached to the bobbin 150 installed in the slot 111. They are connected within the cylindrical portion 151.
- FIG. 10 is an enlarged perspective view showing the shape of one end of the two segment conductors (first rectangular wire 142 and second rectangular wire 143) according to the present embodiment, and before (left side) and after (right side) their connection. It is.
- the first flat wire 142 has a protrusion 142a at one end
- the second flat wire 143 has a groove 143a at one end.
- Each of the protrusion 142a and the groove 143a has two surfaces substantially parallel to the axial direction of the conductive wire. By connecting these two substantially parallel surfaces without any gap, the electrical resistance of the connecting portion 141 can be reduced. Therefore, each of the first rectangular wire 142 and the second rectangular wire 143 is inserted into the coil insertion hole 154 on the opposite side so that the two surfaces substantially parallel to the axial direction of the protrusion 142a and the groove 143a overlap, They are combined within the cylindrical portion 151.
- a coil 140 is wound around a stator core 110 via a bobbin 150 (for example, by wave distributed winding). are integrally molded with resin 160 and fixed.
- the resin 160 of this embodiment is a resin molded by molding (for example, transfer molding).
- the material is not limited to this, and for example, a varnish formed by vacuum pressure impregnation processing can also be used.
- FIG. 11 is a cross-sectional view of a mold 600 used for resin molding of the stator 100 according to this embodiment and the stator 100 installed in the mold 600.
- the mold die 600 includes a cylindrical core die 610, and a disk-shaped lower die 620 and an upper die 630 having a cylindrical portion.
- the lower end of the core mold 610 is fitted into a circular hole 621 provided in the center of the lower mold 620 and placed on the lower mold 620. Then, the hollow portion of the stator 100 is fitted into the core mold 610.
- the radially outer portion of the axial lower end surface 134 of the back yoke 130 abuts the tip surface 623 of the cylindrical portion 622 that protrudes upward from the outer periphery of the lower mold 620. .
- the lower coil end 144 of the stator 100 is wrapped by the lower mold 620.
- the upper end of the core mold 610 is fitted into the circular hole 631 of the upper mold 630, and the upper mold 630 is placed on the core mold 610.
- the upper mold 630 placed on the core mold 610 has an end surface 633 of a cylindrical portion 632 protruding downward from the outer periphery of the upper mold 630 in contact with a radially outer portion of the upper end surface 133 of the back yoke 130 in the radial direction. come into contact with As a result, the upper coil end 144 of the stator 100 is wrapped by the upper die 630.
- the stator 100 is fixed by sandwiching the lower mold 620 and the upper mold 630, and a cavity (filling chamber) is formed between the stator 100, the core mold 610, and the lower mold 620 or the upper mold 630.
- An upper cavity 710 formed by the stator 100, the core mold 610, and the upper mold 630, and a lower cavity 720 formed by the stator 100, the core mold 610, and the lower mold 620 form an axial flow direction shown in FIG. It is communicated by a path 161.
- the axial flow path 161 is sandwiched between the third side wall 151c of the cylindrical portion 151 of the bobbin 150, the circumferential side walls 122 of the two adjacent teeth 120, and the outer peripheral wall of the core mold 610. Note that the convex portion 152 of the bobbin 150 comes into contact with the outer circumferential wall of the core mold 610, thereby preventing the bobbin 150 from moving radially inward within the slot 111 and blocking the axial flow path 161.
- liquid resin 162 for example, thermosetting resin such as unsaturated polyester
- injection port (gate) 634 provided in upper mold 630 and is press-fitted into upper cavity 710 under a pressure of several MPa. be done.
- the liquid resin 162 press-fitted into the upper cavity 710 flows into the lower cavity 720 via the axial flow path 161 and fills the upper cavity 710, the lower cavity 720, and the axial flow path 161.
- the gap formed between the recess 131 of the back yoke 130 and the end 121 of the teeth 120 is also filled with the liquid resin 162.
- stator 100 and the mold 600 in which the upper cavity 710, the lower cavity 720, and the axial flow path 161 are filled with the liquid resin 162, are heated to harden the liquid resin 162. After the liquid resin 162 hardens, the stator 100 is removed from the mold 600 to form the stator 100 shown in FIG. 2.
- FIG. 13 is an enlarged perspective view of the upper end of a bobbin according to a comparative example. As shown in FIG. 13, the third side wall 951c of the cylindrical portion 951 does not have a convex portion 152, and the back yoke side portion 953a of the collar portion 953 does not have a slope 155.
- FIG. 14 is a cross-sectional view of a mold 600 used for resin molding of a stator 900 according to a comparative example of the present invention, and a stator 900 installed in the mold 600.
- FIG. 15 is an enlarged view of section A in FIG. 14.
- FIG. 16 schematically shows the pressure Pr applied to the connecting portion 141 of the coil 140 when the liquid resin 162 enters between the back yoke 130 and the bobbin 950 of the stator 900 according to a comparative example of the present invention.
- FIG. 16 schematically shows the pressure Pr applied to the connecting portion 141 of the coil 140 when the liquid resin 162 enters between the back yoke 130 and the bobbin 950 of the stator 900 according to a comparative example of the present invention.
- the stator 900 according to the comparative example also has a first flat wire 142 and a second flat wire 143 connected within the slot 111, and a connecting portion inside the cylindrical portion 951 of the bobbin 950. It has 141.
- the stator 900 according to the comparative example is fixed to the mold die 600, like the stator 100 according to the first embodiment of the present invention, and the liquid resin 162 is poured from the gate 634 of the upper mold 630. Press-fitted.
- the bobbin 950 does not have the protrusion 152 on the third side wall 951c of the cylindrical portion 951, as shown in FIG. Therefore, as shown in FIG. 12, the axial flow path 161 is not secured by the convex portion 152 coming into contact with the outer circumferential wall of the core mold 610. Therefore, as shown in FIG. 15, when the end surface 955 of the back yoke side portion 953a is pressed by the liquid resin 162, there is a possibility that the cylindrical portion 951 moves in the direction of the core mold 610 shown in FIG. When the cylindrical portion 951 moves in the direction of the core mold 610, there is a possibility that a gap may be formed between the first side wall 951a and the inner wall 132 of the back yoke 130.
- the liquid resin 162 is sufficiently heated and injected in a state where the viscosity is low. Therefore, there is a possibility that the liquid resin 162 may enter from the gap between the back yoke side portion 953a of the collar portion 953 and the back yoke 130 into the gap between the first side wall 951a of the cylindrical portion 951 of the bobbin 950 and the inner wall 132 of the back yoke 130. .
- An annular coil end 144 which is unique to distributed winding, is formed at both ends of the coil 140, and is restrained from deformation in the radial direction. Therefore, when the liquid resin 162 enters between the cylindrical portion 951 and the back yoke 130, the radially inner pressing force Pr acts only on the coil 140 within the slot 111. As a result, if the connecting portions 141 are separated or the contact area is reduced, contact resistance increases, local heat generation due to increased Joule loss, melting or breakage of the bobbin, and conduction between the coil 140 and stator core 110 occur. , there is a risk of causing defects such as ground faults.
- a protrusion 152 is provided on the third side wall 151c of the bobbin 150.
- the convex portion 152 comes into contact with the outer peripheral wall of the core mold 610 placed in the hollow portion of the stator core 110 during the resin molding process, and prevents the bobbin 150 from moving toward the opening 112 of the slot 111 (see FIG. 4). Therefore, it is possible to prevent a gap from being formed between the stator core 110 and the bobbin 150 into which the liquid resin 162 can easily enter.
- the present embodiment it is possible to suppress the liquid resin 162 from entering between the stator core 110 and the bobbin 150 during the resin molding process, thereby preventing the coil 140 from deforming and weakening the electrical connection of the connecting portion 141. can be suppressed.
- the protrusion 152 comes into contact with the core mold 610, so that an axial flow path 161 for the liquid resin 162 is formed around the protrusion 152 in the slot 111.
- the liquid resin 162 flowing into the axial flow path 161 presses the cylindrical portion 151 of the bobbin 150 against the inner wall 132 on the outer diameter side of the slot 111. That is, from this point of view as well, it is possible to suppress liquid resin 162 from entering between stator core 110 and bobbin 150, and it is possible to suppress deformation of coil 140 and weakening of the electrical connection of connection portion 141.
- the convex portion 152 of this embodiment is a protrusion extending from one end of the slot 111 in the axial direction to the other end. Therefore, the cylindrical portion 151 can be pressed against the inner wall 132 on the outer diameter side of the slot 111 from one end of the slot 111 in the axial direction to the other end. Therefore, it is possible to further suppress the liquid resin 162 from entering between the stator core 110 and the bobbin 150, and it is possible to suppress the coil 140 from deforming and further weakening the electrical connection of the connecting portion 141.
- the length d2 extending from the cylindrical portion 151 of the back yoke side portion 153a in the radial direction of the stator core 110 in this embodiment is the length d2 extending from the cylindrical portion 151 of each of the two teeth side portions 153b in the circumferential direction of the stator core 110. It is longer than the length d1. Therefore, the liquid resin 162 enters between the inner wall 132 of the back yoke 130 and the first side wall 151a of the bobbin 150 from between the side walls 122 of the two circumferentially adjacent teeth 120 and the two second side walls 151b of the bobbin 150. can be restrained from doing so.
- the axially outer surface 155 of the back yoke side portion 153a provided in the collar portion 153 of the bobbin 150 according to the present embodiment has an upward slope from the outer side to the inner side in the radial direction of the stator core 110. Therefore, as shown in FIG. 17, the pressure Pr with which the liquid resin 162 presses the back yoke side portion 153a of the collar portion 153 from the outside in the radial direction is equal to the pressure Pr' perpendicular to the slope 155 and the pressure Pr'' horizontal to the slope 155. Furthermore, the pressure Pr' perpendicular to the slope 155 is decomposed into a pressure Pr'1 perpendicular to the end surface 133 of the back yoke 130 and a pressure Pr''2 horizontal (not shown). be able to.
- the coil 140 of this embodiment has a plurality of segment conductors, and uses an in-slot connection method in which each of the plurality of segment conductors is connected within the cylindrical portion 151 of the bobbin 150 fitted into the slot 111. Therefore, compared to the coil end connection method in which the coils are connected by welding at the coil ends, bending and welding at the coil ends are unnecessary. Therefore, high production and miniaturization of rotating electric machines can be achieved.
- the plurality of segment conductors included in the coil 140 include a first rectangular wire 142 having a protrusion 142a at one end, a second rectangular wire 143 having a groove 143a at one end, and the protrusion 142a being fitted into the groove 143a. It has a connecting part 141. Therefore, just by pushing the protrusion 142a into the groove 143a, the two are fitted, and the protrusion 142a and the groove 143a (that is, the first rectangular wire 142 and the second rectangular wire 143) can be easily connected.
- the stator core 110 also includes a recess 131 provided on the inner circumferential surface of the cylindrical back yoke 130 and extending in the axial direction of the back yoke 130, and teeth 120 whose ends 121 are fitted into the recess 131.
- a radial gap formed between the ends 121 of the teeth 120 and the ends 121 of the teeth 120 is filled with liquid resin 162 (resin 160).
- the teeth 120 are pressed in the inner diameter direction, and the circumferential direction formed between the recess 131 of the back yoke 130 and the end 121 of the tooth 120 fitted in the recess 131
- the gap can be made smaller than the radial gap. Therefore, the magnetic flux flowing inside the tooth 120 from the other end 123 of the tooth 120 toward the end 121 flows from the end 121 of the tooth 120 to the recess 131 of the back yoke 130 in the circumferential direction. Thereby, magnetic flux can be suppressed from flowing toward the outer diameter side of the back yoke 130, and iron loss generated in the back yoke 130 can be reduced.
- the teeth 120 are trapezoidal columns that can be formed from amorphous metal, iron loss can be further reduced.
- the rotating electrical machine 1000 according to this embodiment can be used as a power source for a compressor.
- a compressor using the rotating electric machine 1000 according to the present embodiment, which has reduced loss, as a power source can realize energy saving.
- FIG. 18 is an enlarged perspective view of the upper end of the bobbin 2150 according to the second embodiment of the present invention.
- FIG. 19 is a partial plan view showing a state in which a bobbin 2150 according to the second embodiment of the present invention is attached to the slot 111 of the stator core 110.
- the bobbin 2150 according to this embodiment differs from the bobbin 150 according to the first embodiment in the following points. That is, the axially outer surface 2156 of each of the two teeth-side portions 2153b of the collar portion 2153 of the bobbin 2150 is sloped upward from the axial end surface of the teeth 120 toward the slot 111.
- FIG. 19 is a partial plan view of the stator 100 in which the bobbin 2150 according to the present embodiment is installed in the slot 111 of the stator core 110. Since each axially outer surface 2156 of the tooth side portion 2153b (see FIG. 18) of the flange portion 2153 is inclined, the width of the radial flow path 163 on the tooth 120 in the circumferential direction of the stator 2100 is upward. The flow path cross-sectional area becomes larger.
- the liquid resin 162 filled in the upper cavity 710 presses the slopes 2156 of the two tooth side portions 2153b of the collar portion 2153 of the bobbin 2150.
- a force perpendicular to the slope 2156 is generated in the tooth side portion 2153b that is pressed against the slope 2156 by the liquid resin 162, and the surface of the tooth side portion 2153b facing the axial end surface of the tooth 120 is pressed against the slope 2156. Pressed against the axial end face. Therefore, movement of the bobbin 2150 in the radial direction is suppressed, and formation of a gap between the cylindrical portion 151 of the bobbin 2150 and the inner wall of the slot 111 of the stator core 110 can be suppressed. Therefore, it is possible to suppress liquid resin 162 from entering between stator core 110 and bobbin 2150, and it is possible to suppress deformation of coil 140 and weakening of the electrical connection at the connecting portion.
- FIG. 20 is an external perspective view of a bobbin 3150 according to a third embodiment of the present invention
- FIG. 21 is a perspective view of a stator 3100 in which a bobbin 3150 according to a third embodiment of the present invention is installed in a slot 111 of a stator core 110.
- FIG. 21 is a perspective view of a stator 3100 in which a bobbin 3150 according to a third embodiment of the present invention is installed in a slot 111 of a stator core 110.
- the bobbin 3150 according to this embodiment differs from the bobbin 150 according to the first embodiment in a convex portion 3152. That is, the convex portion 152 according to the first embodiment is a protrusion that protrudes from the third side wall 151c facing the opening 112 of the cylindrical portion 151 and extends from one end of the slot 111 to the other end in the axial direction. In contrast, the convex portion 3152 according to the present embodiment is two protrusions that protrude from the third side wall 151c and extend along the side walls 122 (see FIG. 4) of the two teeth 120 that sandwich the slot 111.
- the convex portion 3152 of the bobbin 3150 is two protrusions extending along the side surfaces of the two teeth 120 that sandwich the slot 111. Therefore, the axial flow path 3161 is one flow path having a larger cross-sectional area than the axial flow path 161 of the first embodiment, which is divided into two by the convex portion 152. Therefore, since the liquid resin 162 flows easily through the axial flow path 3161, it is possible to suppress a decrease in the strength of the resin 160 due to molding defects such as voids (bubbles) and a decrease in density.
- the molding pressure for filling the cavities 710 and 720 with the liquid resin 162 to a predetermined density can be reduced, and deformation of the coil 140 and the like due to the pressing force of the liquid resin 162 can be suppressed. Therefore, it is possible to prevent the coil from deforming and weakening the electrical connection at the connection portion.
- FIG. 22 is an enlarged perspective view of the upper end of a bobbin 4150 according to the fourth embodiment of the present invention.
- the bobbin 4150 according to this embodiment differs from the bobbin 150 according to the first embodiment in the shape and position of the convex portion 4152.
- the convex portion 152 according to the first embodiment is a protrusion that protrudes from the third side wall 151c facing the opening 112 of the cylindrical portion 151 and extends from one end of the slot 111 in the axial direction to the other end.
- the convex portion 4152 according to the present embodiment is a protrusion provided on the outer wall 4151d of the flange portion 4153 on the opening 112 side.
- the convex portion 4152 is a protrusion provided on the outer wall 4151d of the collar portion 4153 on the opening 112 side. Therefore, the axial flow path 4161 is not divided into two in the axial direction by the convex portion 152 like the axial flow path 161 of the first embodiment, but has one flow path having a large cross-sectional area. Therefore, the pressure loss (friction loss) due to the flow path can be reduced, the liquid resin 162 can easily flow through the axial flow path 3161, and the strength of the resin 160 can be suppressed from decreasing due to molding defects such as voids (bubbles) and density reduction. can.
- the molding pressure for filling the cavities 710 and 720 with the liquid resin 162 to a predetermined density can be reduced, and deformation of the coil 140 and the like due to the pressing force of the liquid resin 162 can be suppressed. Therefore, it is possible to prevent the coil from deforming and weakening the electrical connection at the connection portion. Furthermore, since the shape of the bobbin 4150 can be simplified, moldability can be improved.
- the convex portion 4152 comes into contact with the core 610, so even if the liquid resin 162 is press-fitted from the gate 634, the bobbin 4150 is placed on the radially inner side. cannot move to. On the other hand, the liquid resin 162 enters the axial flow path 161, and the bobbin 4150 is pressed radially outward. Therefore, it is possible to suppress liquid resin 162 from entering between stator core 110 and bobbin 4150, and it is possible to suppress deformation of coil 140 and weakening of the electrical connection of connection portion 141.
- FIG. 23 is an enlarged perspective view of the upper end of a bobbin 5150 according to the fifth embodiment of the present invention.
- FIG. 24 is a partial plan view of a stator 5100 in which a bobbin 5150 according to a fifth embodiment of the present invention is installed in a slot 111 of a stator core 110.
- the bobbin 5150 according to this embodiment differs from the bobbin 4150 according to the fourth embodiment in the location and number of protrusions 5152 provided. That is, in the fourth embodiment, one protrusion 4152 is provided on the outer wall 4151d of the flange 4153 on the opening 112 side. On the other hand, in this embodiment, it is provided on the outer wall 5153d on the opening 112 side of each of the two teeth side portions 5153b of the collar portion 5153. That is, one convex portion 4152 in the fourth embodiment is provided on the outer wall 4151d of the collar portion 4153. In contrast, two protrusions 5152 in the fifth embodiment are provided, one on each of the outer walls 5153d of the two tooth side portions 5153b of the collar 5153.
- the convex portions 5152 may be two protrusions that are located at both circumferential ends of the stator core 110 of the flange portion 5153 and protrude toward the inside of the stator core 110 in the radial direction.
- the convex portion 5152 according to the present embodiment is provided on the radially inner outer wall 5153d of the stator core 110 of each of the two tooth side portions 5153b of the flange portion 5153. Therefore, the base can be made thicker and more rigid, and can be easily molded.
- the protrusions 5152 are provided on two tooth side portions 5153b that cover a part of the axial end surfaces of each of the two teeth 120 that sandwich the slot 111 from the circumferential direction. Therefore, unlike the convex portion 4152 of the fourth embodiment, the inlet of the axial flow path 5161 is not divided into two.
- the convex portions 5152 are two protrusions located at both ends of the flange portion 5153 in the circumferential direction of the stator core 110 and protrude toward the inside of the stator core 110 in the radial direction, the axial flow path as shown in FIG. The entrance of 5161 can be opened wide. Therefore, the liquid resin 162 easily flows into the axial flow path 5161.
- the pressure loss (friction loss) due to the flow path can be further reduced, the liquid resin 162 can easily flow through the axial flow path 5161, and the strength of the resin 160 can be prevented from decreasing due to molding defects such as voids (bubbles) and density reduction. It can be suppressed. Further, the molding pressure for filling the cavities 710 and 720 with the liquid resin 162 to a predetermined density can be reduced, and deformation of the coil 140 and the like due to the pressing force of the liquid resin 162 can be suppressed. Therefore, it is possible to prevent the coil from deforming and weakening the electrical connection at the connecting portion. Furthermore, since the shape of the bobbin 4150 can be simplified, moldability can be improved.
- FIG. 25 is an external perspective view of the bobbin 6150 according to this embodiment.
- FIG. 26 is a sectional view showing a stator 6100 using a bobbin 6150 according to the sixth embodiment of the present invention installed in a molding die 600, and
- FIG. 27 is an enlarged view of section A in FIG. 30.
- FIG. 28 is a partial plan view of the stator 6100 according to this embodiment.
- the bobbin 6150 according to this embodiment differs from the bobbin 150 according to the first embodiment in the shape of the back yoke side portion 6153a of the collar portion 6153.
- the back yoke side portion 6153a has no slope 155 on the axially outer side, and the axially outer side surface of the collar portion 6153 extends.
- the outer end surface 6155 of the back yoke side portion 6153a on the outer side in the radial direction of the stator core 110 is located on the radially outer side of the stator core 110 than the outermost inner circumferential wall 6341 of the gate 634 in the radial direction of the stator core 110. Therefore, as shown in FIG.
- the outer end surface 6155 is located on the outer side in the radial direction of the stator core 110 than the gate mark 164 formed on the surface of the resin 160.
- the gate traces 164 are formed on the upper surface of the resin 160, the gate traces 164 are not limited to this, and may be formed on the sloped side surfaces of the resin 160, for example.
- the outer end surface 6155 can be brought into close contact with the inner circumferential wall 6321 of the upper die 630. In this case, the outer end surface 6155 is exposed from the resin 160.
- the liquid resin 162 presses the axially outer surface 6156 of the back yoke side portion 6153a compared to the outer end surface 6155, and as a result, the back yoke side portion (flange portion) can be easily pressed toward the stator core. This prevents a gap from being formed between the back yoke side part (flange) and the stator core, so it is possible to suppress resin from entering between the stator core and the bobbin, and the coil 140 is deformed and the connection part 141 can be prevented from weakening.
- the outer end surface 6155 when the outer end surface 6155 is in close contact with the inner circumferential wall 6321 of the upper mold 630, it is not covered with the resin 160 and is exposed from the resin 160. On the other hand, in this case, the outer end surface 6155 is not pressed by the liquid resin 162 press-fitted from the gate 634 of the upper mold 630. Therefore, it is possible to prevent resin from entering between the stator core and the bobbin from between the lower part of the outer diameter side end face of the collar and the axial end face of the back yoke, causing the coil to deform and preventing electrical connection at the connection part. Weakening can be suppressed.
- the present invention is not limited to the embodiments described above, and includes various modifications.
- the embodiments described above have been described in detail to explain the present invention in an easy-to-understand manner, and the present invention is not necessarily limited to having all the configurations described.
- the embodiment of the present invention may have the following aspects. That is, although an embodiment has been shown in which the rotating electrical machine 1000 is a wave-wound distributed winding radial gap type electric motor used as a power source for a compressor, the present invention is not limited thereto. For example, it may be applied to generators rather than electric motors, it is not limited to wave-wound distributed winding, and other winding methods may be used, and industrial machinery other than compressors such as industrial robots, press machines, or hydraulic machines, automobiles, and home appliances. It may also be used as a power source.
- the slot combination of the number of poles and the number of slots, the materials of the stator core and resin, the shapes of the protrusions and collars of the bobbin, etc. are not limited to the above embodiments.
- a second recess 7133 may be provided on the bottom surface of the first recess 7131 of the back yoke 7130, which faces the radially outer surface 121a of the teeth 120.
- the liquid resin 162 is filled between the radially outer surface 121a of the teeth 120 and the bottom surface of the first recess 7131 of the back yoke 7130 starting from the second recess 7133, and the teeth 120 are moved radially inward. Apply pressure.
- the circumferential side wall 122 of the stator core 7110 of the teeth 120 is pressed against the circumferential side wall 7134 of the first recess 7131 of the back yoke 7130.
- the teeth 120 are further pushed in the inner radial direction, and the circumferential gap formed between the recess of the back yoke and one end of the tooth fitted in the recess is reduced in the radial direction. It can be made smaller than the gap. Therefore, the magnetic flux that has flowed inside the teeth from the other end of the teeth toward one end further flows from one end of the teeth in the circumferential direction to the recessed portion of the back yoke. Thereby, it is possible to further suppress the flow of magnetic flux toward the outer diameter side of the back yoke, and it is possible to further reduce iron loss occurring in the back yoke.
- liquid resin can be placed between the radially outer surface 121a of the teeth 120 and the bottom surface of the first recess 7131 of the back yoke 7130. can be further filled. Thereby, it is possible to further suppress the flow of magnetic flux toward the outer diameter side of the back yoke, and it is possible to further reduce iron loss occurring in the back yoke.
- stator core is divided into a back yoke and a plurality of teeth
- present invention is not limited to this.
- a stator core in which the back yoke and teeth are integrated may be used.
- a widened portion may be provided at the tip of the tooth to make the slot semi-closed.
- the resin is preferably a thermosetting resin, but is not limited to this, and any resin that can be pressure molded may be used, and a thermoplastic resin may also be used.
- a resin that has small curing shrinkage and a coefficient of linear expansion close to that of the iron core it is desirable to use a resin that has small curing shrinkage and a coefficient of linear expansion close to that of the iron core.
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Abstract
Description
図1は本発明の第1実施形態に係る回転電機1000の外観斜視図である。回転電機1000は、ロータ内の永久磁石により発生する直流磁界と、コイルから放出される回転磁界とを吸引反発させ、ロータを回転させる電動機、例えば、圧縮機の動力源として用いられるラジアルギャップ型電動機である。
図13は、比較例に係るボビンの上端の拡大斜視図である。図13に示すように筒部951の第3側壁951cに凸部152を有さず、鍔部953のバックヨーク側部分953aに斜面155を有さない。
また、液体樹脂162は十分に加熱され粘性が低い状態で注入される。そのため、液体樹脂162が鍔部953のバックヨーク側部分953aとバックヨーク130の隙間から、ボビン950の筒部951の第1側壁951aとバックヨーク130の内壁132との隙間に侵入する虞がある。
本発明の回転電機1000は、コイル140の接続部141の電気的接続の弱化を抑制するため、樹脂160によってステータコア110とボビン150とコイル140とが一体化するように、樹脂成形加工を行う。樹脂成形加工に際しては、ステータ100の中空部分に芯型610が置かれ、コイルエンド144を覆う上型630と下型620がステータ100を軸方向の両側から挟持する。そして、芯型610、上型630または下型620とステータ100との間に形成されるキャビティ(充填室)にゲート634から液体樹脂162が圧入される。その際、圧入される液体樹脂162がステータコア110とボビン950の間に侵入すると、コイル140の接続部141の電気的接続を弱化する虞がある。
Pr’=Pr・sinθ
Pr’1=Pr’・cosθ=Pr・sinθ・cosθ
と表すことができる。
(第2実施形態)
図18は、本発明の第2実施形態に係るボビン2150の上端の拡大斜視図である。また、図19は、本発明の第2実施形態に係るボビン2150をステータコア110のスロット111に装着させた状態を示す部分平面図である。
本実施形態に係るボビン2150が第1実施形態に係るボビン150と異なる点は次の通りである。即ち、ボビン2150の鍔部2153の2つのティース側部分2153bの各々の軸方向外側の面2156が、ティース120の軸方向端面からスロット111に向かって上り勾配の傾斜となっている点である。
ゲート634から圧入された液体樹脂162の一部は、ティース120の軸方向の端面に沿って径方向内側の軸方向流路161に向かって流れる。このとき、鍔部2153のティース側部分2153bの各々の軸方向外側の面2156が傾斜となっているため、ティース120上の径方向流路163はステータ2100の周方向における幅が上方で広がり、流路断面積が大きくなっている。そのため、液体樹脂162が径方向流路163を流れる際の圧力損失(摩擦損失)を軽減でき、液体樹脂162が軸方向流路161に向かって流れやすくなる。これによりボイド(気泡)や密度低下などの成形不良により樹脂160の強度が低下することを抑制できる。また、キャビティ710、720に液体樹脂162を所定密度で充満させるための成形圧が軽減でき、液体樹脂162の押圧力によるコイル140などの変形を抑制できる。このため、コイル140が変形して接続部の電気的接続が弱化することを抑制できる。
図20は、本発明の第3実施形態に係るボビン3150の外観斜視図であり、図21は、本発明の第3実施形態に係るボビン3150をステータコア110のスロット111に装着させたステータ3100の部分平面図である。
本実施形態に係るボビン3150の凸部3152は、スロット111を挟む2つのティース120の側面に沿って延伸する2つの突条である。そのため、軸方向流路3161は、凸部152によって2つに分割された第1実施形態の軸方向流路161よりも断面積が大きい1つの流路となっている。そのため、液体樹脂162が軸方向流路3161を流れやすくなるため、ボイド(気泡)や密度低下などの成形不良により樹脂160の強度が低下することを抑制できる。また、キャビティ710、720に液体樹脂162を所定密度に充満させるための成形圧が軽減でき、液体樹脂162の押圧力によるコイル140などの変形を抑制できる。このため、コイルが変形して接続部の電気的接続が弱化することを抑制できる。
図22は、本発明の第4実施形態に係るボビン4150の上端の拡大斜視図である。本実施形態に係るボビン4150が第1実施形態に係るボビン150と異なる点は、凸部4152の形状と位置である。
本実施形態に係る凸部4152は、鍔部4153における開口部112側の外壁4151dに設けられた突起である。そのため、軸方向流路4161は、第1実施形態の軸方向流路161のように凸部152によって軸方向に2つに分割されず、1つの断面積が大きい流路を備える。したがって、流路による圧力損失(摩擦損失)を軽減でき、液体樹脂162が軸方向流路3161を流れやすく、ボイド(気泡)や密度低下などの成形不良により樹脂160の強度が低下することを抑制できる。また、キャビティ710、720に液体樹脂162を所定密度に充満させるための成形圧が軽減でき、液体樹脂162の押圧力によるコイル140などの変形を抑制できる。このため、コイルが変形して接続部の電気的接続が弱化することを抑制できる。さらに、ボビン4150の形状が単純化できるため、成形性を向上させることができる。
図23は、本発明の第5実施形態に係るボビン5150の上端の拡大斜視図である。また、図24は、本発明の第5実施形態に係るボビン5150をステータコア110のスロット111に装着させたステータ5100の部分平面図である。
本実施形態に係る凸部5152は、鍔部5153の2つのティース側部分5153bの各々のステータコア110における径方向内側の外壁5153dに設けられている。そのため、基部が厚く剛性を強くできるとともに容易に成形することができる。
また、ステータ100を樹脂成形加工するためにモールド金型600に設置したときに、凸部5152が芯型610に当接するため、液体樹脂162をゲート634から圧入しても、ボビン5150は径方向内側に移動できない。一方、軸方向流路5161には液体樹脂162が侵入し、ボビン5150は径方向外側に押圧される。したがって、ステータコア110とボビン5150の間に液体樹脂162が侵入することを抑制でき、コイル140が変形して接続部141の電気的接続が弱化することを抑制できる。
図25は、本実施形態に係るボビン6150の外観斜視図である。図26は、本発明の第6実施形態に係るボビン6150を用いたステータ6100をモールド金型600に設置した状態を示す断面図で、図27は図30のA部の拡大図である。図28は、本実施形態に係るステータ6100の部分平面図である。
[効果]
樹脂成形加工時に用いられる型枠(上型630)の樹脂注入口(ゲート634)の位置はゲート跡として樹脂160の表面に現れる。本実施形態のようにバックヨーク側部分6153aにおけるステータコア110の径方向における外側の端面(以下、外側端面と称する)6155が当該ゲート跡よりステータコアの径方向における外側に位置する場合には、樹脂成形加工時の液体樹脂162はバックヨーク側部分6153aの外側端面6155よりも径方向内側の位置から鍔部6153方向に注入される。そのため液体樹脂162によってバックヨーク側部分6153aの外側端面6155に比して軸方向外側の面6156が押圧され、その結果、バックヨーク側部分(鍔部)がステータコアに向かって容易に押圧され得る。これによりバックヨーク側部分(鍔部)とステータコアとの間に隙間が形成されることが妨げられるので、ステータコアとボビンの間に樹脂が侵入することを抑制でき、コイル140が変形して接続部141の電気的接続が弱化することを抑制できる。
Claims (15)
- ロータと、
前記ロータ側に開口部が設けられたスロットを有するステータコアと、
前記スロットに嵌め込まれコイルが挿入されるボビンと、
前記ボビンにおける前記開口部側に設けられた凸部と、
前記ステータコアと前記コイルと前記ボビンとを固定する樹脂とを備える、
ことを特徴とする回転電機。 - 請求項1に記載の回転電機であって、
前記凸部が、前記スロットの軸方向の一端から他端にわたって延びる突条である、
ことを特徴とする回転電機。 - 請求項2に記載の回転電機であって、
前記凸部は、前記スロットを挟む2つのティースの側面に沿って延伸する2つの突条である、
ことを特徴とする回転電機。 - 請求項1に記載の回転電機であって、
前記ボビンは、前記コイルが挿入される筒部と、前記筒部の軸方向における端部の少なくとも一方に設けられた鍔部とを備え、
前記鍔部は、前記スロットの径方向外側に位置するバックヨークの軸方向の端面の一部を覆うバックヨーク側部分を有し、
前記バックヨーク側部分における軸方向外側の面が、前記ステータコアの径方向における外側から内側に向かって上り勾配の斜面となっている、
ことを特徴とする回転電機。 - 請求項4に記載の回転電機であって、
前記鍔部は、前記スロットを周方向から挟む2つのティースの各々の軸方向の端面の一部を覆う2つのティース側部分を有し、
前記2つのティース側部分の各々は、軸方向外側の面が、前記2つのティースの軸方向端面から前記スロットに向かって上り勾配の斜面となっている、
ことを特徴とする回転電機。 - 請求項1に記載の回転電機であって、
前記ボビンは、前記コイルが挿入される筒部と、前記筒部の軸方向における端部の少なくとも一方に設けられた鍔部を有し、
前記凸部は、前記鍔部における前記開口部側の外壁に設けられている、
ことを特徴とする回転電機。 - 請求項1に記載の回転電機であって、
前記ボビンは、前記コイルが挿入される筒部と、前記筒部の軸方向における端部の少なくとも一方に設けられた鍔部を有し、
前記鍔部は、前記スロットを前記ステータコアの周方向から挟む2つのティースの各々の軸方向の端面の一部を覆う2つのティース側部分を有し、
前記凸部は、前記2つのティース側部分の各々における前記開口部側の外壁に設けられている、
ことを特徴とする回転電機。 - 請求項7に記載の回転電機であって、
前記凸部が、前記鍔部の前記ステータコアにおける周方向の両端に位置し、前記ステータコアの径方向内側に向かって突出する2つの突条であることを特徴とする回転電機。 - 請求項1に記載の回転電機であって、
前記ボビンは、前記コイルが挿入される筒部と、前記筒部の軸方向における端部の少なくとも一方に設けられた鍔部とを有し、
前記鍔部は、前記スロットの径方向外側に位置するバックヨークの軸方向の端面の一部を覆うバックヨーク側部分と、前記スロットを前記ステータコアの周方向から挟む2つのティースの各々の軸方向の端面の一部を覆う2つのティース側部分とを有し、
前記バックヨーク側部分の前記筒部から前記ステータコアの径方向に延伸する長さが、前記2つのティース側部分の各々の前記筒部から前記ステータコアの周方向に延伸する長さより長いことを特徴とする回転電機。 - 請求項9に記載の回転電機であって、
前記バックヨーク側部分における前記ステータコアの径方向における外側の端面が、前記樹脂の表面に形成されたゲート跡より前記ステータコアの径方向における外側に位置することを特徴とする回転電機。 - 請求項10に記載の回転電機であって、
前記バックヨーク側部分における前記ステータコアの径方向における外側の端面が前記樹脂から露出していることを特徴とする回転電機。 - 請求項1に記載の回転電機であって、
前記コイルは、複数のセグメント導体を有し、
前記複数のセグメント導体の各々は、前記ボビン内で接続されていること、
を特徴とする回転電機。 - 請求項12に記載の回転電機であって、
前記複数のセグメント導体は、
突起部を一端に有する第1平角線と、
溝部を一端に有する第2平角線と、
前記突起部が前記溝部に嵌合される接続部とを有すること、
を特徴とする回転電機。 - 請求項1に記載の回転電機であって、
前記ステータコアは、前記スロットの径方向外側に位置する円筒状のバックヨークと、前記バックヨークの内周面に設けられ前記バックヨークの軸方向に延びる凹部と、前記凹部に一端が嵌合されたティースとを備え、
前記樹脂は、前記凹部と前記ティースの一端との間に形成される径方向の隙間に充填されていることを特徴とする回転電機。 - 請求項1に記載の回転電機を備えることを特徴とする産業機械。
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