Armature and rotating electrical machine

Abstract

The stator (16) includes a stator core (28) having a plurality of pole tooth portions (28B), and a plurality of coils (34) formed by winding the plurality of pole tooth portions (28B), respectively. A part of the winding wire forming the coils (34) forms an inter-coil connection part (32F) connecting the coils (34). In addition, a first tail end portion (32B) and a second tail end portion (32C), which are one tail end portion and the other tail end portion of the winding wire (32), are respectively led out from the other side in the circumferential direction and one side in the circumferential direction of a coil (34) formed by winding a predetermined pole tooth portion (28B) to one side in the axial direction. In addition, the number of conductor portions (32A), which are portions forming the coils (34) and arranged in the axial direction along the pole tooth portions (28B), in the winding wire (32) is set to be the same number in each coil (34).

Description

Citation of related applications

[0001] This application is based on Japanese Patent Application No. 2022-127360 filed on August 9, 2022, and the contents thereof are incorporated herein by reference. Technical Field

[0002] The present disclosure relates to an armature and a rotating electric machine. Background Art

[0003] The following patent document 1 discloses a stator for a brushless motor. The stator described in the document includes a core having a plurality of teeth and an insulator mounted on the core. In addition, the stator includes a plurality of coils formed by winding conductive windings around a plurality of pole teeth. Then, one end portion and the other end portion of the winding forming the coil are respectively led out to one side in the axial direction from different coils. Prior art literature Patent Literature

[0004] Patent Document 1: Japanese Patent Application Publication No. 2013-162726 Summary of the invention

[0005] From the perspective of achieving miniaturization of the portion connecting one end portion of the winding forming the coil and the other end portion, it is desired to concentrate one end portion and the other end portion of the winding forming the coil, but in the structure described in the above-mentioned patent document 1, there is still room for improvement in this regard.

[0006] An object of the present disclosure is to obtain an armature and a rotating electric machine capable of concentrating one end portion and the other end portion of a winding wire forming a coil.

[0007] In a first embodiment of the present disclosure, the armature includes: an armature core having a plurality of pole teeth arranged at intervals in the circumferential direction; a plurality of coils formed by winding conductive windings around the plurality of pole teeth, respectively; an inter-coil connection portion, which is a portion of the winding and connects the coils; a first end portion and a second end portion, which are one end portion and the other end portion of the winding and are respectively led out from the other circumferential side and one circumferential side of the coil formed around a specified one of the pole teeth toward one axial side; and a plurality of conductor portions, which are portions of the winding that form the coil and are portions respectively arranged along the pole teeth and in the axial direction, and the number of conductor portions in each of the coils is set to be the same as each other. In addition, a rotating electric machine includes: one of a stator and a rotor including an armature; and the other of the stator and the rotor having a magnet arranged opposite to the armature in the radial direction, wherein the armature includes: an armature core having a plurality of pole teeth arranged at intervals in the circumferential direction; a plurality of coils formed by winding conductive windings around the plurality of pole teeth, respectively; an inter-coil connection portion, which is a part of the winding and connects the coils; a first terminal portion and a second terminal portion, which are one terminal portion and the other terminal portion of the winding and are respectively led out from the other circumferential side and the one circumferential side of the coil formed around a specified one of the pole teeth toward one axial side; and a plurality of conductor portions, which are portions of the winding forming the coil and are portions arranged in the axial direction along the pole teeth, respectively, and the number of the conductor portions in each of the coils is set to be the same as each other.

[0008] With such a configuration, one end portion and the other end portion of the winding wire of the coil can be efficiently formed in a concentrated manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The above objects, other objects, features and advantages of the present disclosure will become more apparent with reference to the accompanying drawings and the following detailed description. Figure 1 This is a schematic diagram schematically showing a cross section of the electric motor according to the first embodiment cut along the axial direction. Figure 2A The diagram schematically shows a cross section of the electric motor according to the first embodiment cut along the axial direction, and shows a state before the rotor is assembled to the housing. Figure 2B It is a perspective view showing a housing and a stator fixed to the housing. Figure 2Cis a partial cross-sectional side view showing a housing and a stator fixed to the housing. Figure 3A This is a top view of the stator as seen from one axial side. Figure 3B This is a side view of the stator as viewed from the radial outside. Figure 4A This is an exploded perspective view of the stator of each phase viewed from the other axial side. Figure 4B This is a perspective view of a portion constituting the U phase in the stator as viewed from the other axial side. Figure 4C This is a bottom view of a portion constituting the U phase in the stator as viewed from the other axial side. Figure 4D This is a perspective view of the core configuration part and the insulator of the U phase as viewed from the other axial side. Figure 5 It is a perspective view of the stator configuration portion of the U phase as viewed from one axial side, and shows the periphery of the coil led out from the first terminal portion and the second terminal portion in an enlarged manner. Figure 6 It is a plan view showing an enlarged portion of a supporting core configuration portion in the insulator. Fig. 7A It is a schematic diagram schematically showing each pole tooth portion of the stator core portion and each U-phase coil formed around each pole tooth portion. Figure 7B It is a schematic diagram schematically showing the connection state of each coil. Figure 8 The diagram schematically shows the pole teeth of the stator core of the electric motor according to the second embodiment and the U-phase coils formed around the pole teeth, and shows a state where the winding is wound halfway around the pole teeth of the stator core. Fig. 9 The diagram schematically shows the pole teeth of the stator core of the motor according to the second embodiment and the coils of the U phase formed around the pole teeth. Fig. 7A The corresponding schematic diagram. DETAILED DESCRIPTION

[0010] use Figure 1 to Figure 7B , the structure of the motor 10 of the first embodiment of the present disclosure is described. In addition, the arrow Z direction, arrow R direction, and arrow C direction appropriately indicated in the figure respectively indicate the rotation axial side, rotation radial outside, and rotation circumferential side of the rotor 14 described later. In addition, hereinafter, when only the axial direction, radial direction, and circumferential direction are indicated, unless otherwise specified, the rotation axial direction, rotation radial direction, and rotation circumferential direction of the rotor 14 are indicated. In addition, the motor 10 of the present embodiment is an example of a rotating electrical machine.

[0011] like Figure 1 , Figure 2A , Figure 2B and Figure 2C As shown, the motor 10 of this embodiment is an inner rotor type brushless motor in which a rotor 14 as a rotating part is arranged radially inside a stator 16 as an armature and a fixed part. The motor 10 includes: a housing 12; a rotor 14 supported by the housing 12; and a stator 16 fixed to the housing 12.

[0012] For example, the housing 12 is formed of steel. The housing 12 is formed into a bottomed cylindrical shape with one axial side open and the other axial side closed. Figure 1 , Figure 2A and Figure 2C As shown, the housing 12 includes: a bottom wall portion 12A, which is formed into a disk shape with the axial direction as the thickness direction; and a peripheral wall portion 12B, which extends from the radially outer end of the bottom wall portion 12A toward one axial side and is formed into a cylindrical shape. A bearing engaging recess 12C is formed in the radial center portion of the bottom wall portion 12A and is recessed toward the other axial side.

[0013] like Figure 1 and Figure 2A As shown, the rotor 14 is configured to include: a rotating shaft 18 formed in a rod shape; and a rotor body 20 fixed to the rotating shaft 18. The inner ring portion of a bearing 22 such as a rolling bearing is fixed to the end portion on the other axial side of the rotating shaft 18. And the rotating shaft 18 is rotatably supported by the housing 12 by the outer ring portion of the bearing 22 being engaged with the bearing engagement recess 12C of the housing 12. That is, the rotor 14 is rotatably supported by the housing 12. The rotor body 20 includes: a rotor core 24 fixed to the rotating shaft 18; and magnets 26 fixed to the outer peripheral surface of the rotor core 24. The rotor core 24 is formed into a cylindrical shape by laminating a plurality of steel plates in the axial direction. The rotating shaft 18 is press-fitted into the radial center portion of the rotor core 24. Thus, the rotor core 24 and the rotating shaft 18 are fixed. A plurality of magnets 26 are fixed to the radially outer surface of the rotor core 24. In the present embodiment, as an example, eight magnets 26 are fixed to the radially outer surface of the rotor core 24. In addition, magnets 26 with N-pole surfaces on the radially outer surface and magnets 26 with S-pole surfaces on the radially outer surface are alternately arranged in the circumferential direction. In addition, the number of magnets 26 can be appropriately set in consideration of the output required by the motor 10, etc.

[0014] like Figures 3A to 4D As shown, the stator 16 includes: a stator core 28 as an armature core; an insulator 30 attached to the stator core 28 ; and a plurality of coils 34 formed by winding conductive wires 32 around the stator core 28 .

[0015] The stator core 28 is formed using a plate material of a soft magnetic metal such as steel, which is formed by stacking multiple plates in the axial direction. The stator core 28 includes: an annular portion 28A formed (configured) in an annular shape; and a plurality of pole teeth 28B protruding radially inward from the annular portion 28A. As an example, the stator core 28 of this embodiment includes twelve pole teeth 28B. The twelve pole teeth 28B are arranged at equal angles in the circumferential direction. Figure 3A , Figure 4A to Figure 4D As shown, the stator core 28 of this embodiment is divided in the circumferential direction at the center of a pair of circumferentially adjacent pole teeth 28B. Here, if each part of the stator core 28 divided in the circumferential direction is called a core component 36, it can be said that the stator core 28 is composed of twelve core components 36. In addition, one core component 36 includes a part of the annular portion 28A and one pole tooth portion 28B.

[0016] like Figure 4A and Figure 4D As shown, as an example, the stator 16 of the present embodiment includes three insulators 30 corresponding to the U phase, V phase, and W phase, which are formed using an insulating resin material or the like. The three insulators 30 are respectively divided into two parts along the axial direction, and are respectively installed on four core-forming parts 36 having a pole tooth portion 28B formed by a coil 34 for the U phase described later, four core-forming parts 36 having a pole tooth portion 28B formed by a coil 34 for the V phase, and four core-forming parts 36 having a pole tooth portion 28B formed by a coil 34 for the W phase. Here, the part on one axial side and the part on the other axial side of the insulator 30 divided into two parts along the axial direction are respectively referred to as the first insulator part 31A and the second insulator part 31B. Moreover, as Figure 4D As shown, the first insulator portion 31A and the second insulator portion 31B corresponding to the U phase are mounted on the four core configuration portions 36 in a state where the four core configuration portions 36 are sandwiched therebetween in the axial direction. In addition, the first insulator portion 31A and the second insulator portion 31B corresponding to the V phase and the W phase are also mounted on the four core configuration portions 36 in the same manner as the first insulator portion 31A and the second insulator portion 31B corresponding to the U phase.

[0017] Figure 4B to Figure 4D and Figure 5 The insulator 30 is shown with a core component 36 having a pole tooth portion 28B formed with a U-phase coil 34. As shown in these figures, four core components 36 are mounted on one insulator 30, and the pole tooth portion 28B has a U-phase coil 34.

[0018] like Figure 6As shown, the insulator 30 includes a winding portion 30A, and the winding portion 30A covers most of the pole tooth portion 28B of the core portion forming portion 36 formed by laminating a plurality of the metal steel plates. A winding wire 32 (see Figure 5 ) to form the coil 34. A plurality of fitting grooves 30B are formed along the axial direction on both sides of the winding portion 30A in the circumferential direction, and the plurality of fitting grooves 30B are used to suppress radial deviation movement of a portion of the winding 32 by fitting a portion of the winding 32.

[0019] In addition, the insulator 30 includes an outer covering portion 30C arranged along the radially inner surface 28A1 of a portion of the annular portion 28A of the core forming portion 36 and the two end surfaces 28A2 in the axial direction. The outer covering portion 30C covers most of the radially inner surface 28A1 of a portion of the annular portion 28A and most of the two end surfaces 28A2 in the axial direction. In addition, in the following description, the portion of the outer covering portion 30C that covers the radially inner surface 28A1 of a portion of the annular portion 28A is sometimes referred to as a first outer covering portion 30C1, and the portion of the outer covering portion 30C that covers the two end surfaces 28A2 in the axial direction of a portion of the annular portion 28A is sometimes referred to as a second outer covering portion 30C2.

[0020] In addition, if Figure 5 and Figure 6 As shown, the insulator 30 includes a flange portion 30D covering the radially inner end portion of the pole tooth portion 28B of the core configuration portion 36. The flange portion 30D protrudes from the radially inner side to one circumferential side (arrow C direction), the other circumferential side (direction opposite to arrow C), one axial side (arrow Z direction), and the other axial side (direction opposite to arrow Z) with respect to the winding portion 30A.

[0021] Furthermore, the insulator 30 includes a central protrusion 30J protruding toward one axial side and the other axial side from the circumferential center of the second outer cover portion 30C2 on one axial side and the circumferential center of the second outer cover portion 30C2 on the other axial side, respectively.

[0022] Here, as already described, the insulator 30 of each phase has a split structure consisting of the first insulator portion 31A and the second insulator portion 31B. Therefore, it can also be said that the first insulator portion 31A and the second insulator portion 31B respectively have the winding portion 30A, the outer cover portion 30C, the flange portion 30D and the central protrusion 30J described above.

[0023] Here, if the winding portion 30A, the outer cover portion 30C, and the flange portion 30D covering the core configuration portion 36 in the first insulator portion 31A are referred to as the insulator main body portion 30G, it can be said that the first insulator portion 31A in each phase has four insulator main body portions 30G. In addition, if the winding portion 30A, the outer cover portion 30C, and the flange portion 30D covering the core configuration portion 36 in the second insulator portion 31B are referred to as the insulator main body portion 30G, it can be said that the second insulator portion 31B in each phase has four insulator main body portions 30G.

[0024] Hereinafter, the characteristic structures of the first insulator portion 31A and the second insulator portion 31B will be described.

[0025] A first winding locking portion 30E, which is open on the other side in the circumferential direction, is formed in the axial direction at the end of the flange portion 30D of the first insulator portion 31A. In addition, a second winding locking portion 30F, which is open on one side in the circumferential direction, is formed in the axial direction at the end of the flange portion 30D of the first insulator portion 31A. A portion of the winding 32 is locked in the axial direction by the first winding locking portion 30E and the second winding locking portion 30F, respectively.

[0026] The second insulator portion 31B includes an annular connecting portion 30H that connects the four insulator main body portions 30G of the second insulator portion 31B in the circumferential direction. The annular connecting portion 30H is formed so that its inner diameter is set to be larger than the rotor main body 20 (see Figure 2A ) is an annular shape with a smaller inner diameter than an outer diameter. The annular connecting portion 30H is arranged on the other side of the four insulator main body portions 30G of the second insulator portion 31B in the axial direction. Moreover, the annular connecting portion 30H is connected to the other side of the flange portion 30D of the four insulator main body portions 30G of the second insulator portion 31B in the axial direction. Figure 4B As shown, due to the presence of the annular connecting portion 30H, the four core components 36 having the pole teeth 28B formed by the coil 34 of the U phase are connected via the insulator 30 (the second insulator portion 31B). Thus, the four core components 36 in the state where the insulator 30 is installed are arranged at equal intervals (equal angle intervals) in the circumferential direction.

[0027] like Figure 4C As shown, a slit groove 30K is formed at the end of the other axial side of one of the four central protrusions 30J of the second insulator portion 31B. The slit groove 30K is formed at the circumferential center of the end of the other axial side of the central protrusion 30J and is formed in a U-shape that is open on the other axial side when viewed from the radial direction.

[0028] In addition, if Figure 4AAs shown, the insulator 30 attached to the four core forming portions 36 of the pole tooth portion 28B formed by the coil 34 for the V phase is also configured in the same manner as the insulator 30 attached to the four core forming portions 36 of the pole tooth portion 28B formed by the coil 34 for the U phase. In addition, the insulator 30 attached to the four core forming portions 36 of the pole tooth portion 28B formed by the coil 34 for the W phase is also configured in the same manner as the insulator 30 attached to the four core forming portions 36 of the pole tooth portion 28B formed by the coil 34 for the U phase. In addition, as Figure 2C and Figure 3B As shown, in the state where the stator 16 is completely assembled, the annular connection portions 30H of the three insulators 30 are arranged to overlap in the axial direction, and the axial positions of all the pole teeth 28B are the same.

[0029] like Figure 5 As shown, as an example, four coils 34 constituting the U phase are formed by a single winding 32 (continuous conductor). The winding 32 is continuously wound around the pole teeth 28B of the four core forming parts 36 supported by the insulator 30, thereby forming the four coils 34 constituting the U phase.

[0030] In addition, the four coils 34 constituting the V phase are also formed by a single winding 32 (continuous conductor) in the same manner as the four coils 34 constituting the U phase. The winding 32 is continuously wound around the pole teeth 28B of the four core-forming parts 36 supported by the insulator 30, respectively, to form the four coils 34 constituting the V phase. In addition, the four coils 34 constituting the W phase are also formed by a single winding 32 (continuous conductor) in the same manner as the four coils 34 constituting the U phase. The winding 32 is continuously wound around the pole teeth 28B of the four core-forming parts 36 supported by the insulator 30, respectively, to form the four coils 34 constituting the W phase. Then, in the state where the stator 16 is assembled, the coils 34 of the U phase, the coils of the V phase, and the coils 34 of the W phase are arranged in sequence in the circumferential direction.

[0031] Next, the detailed structure of the stator 16 according to the present embodiment will be described.

[0032] Figure 5 A coil 34 is shown. Here, the coil 34 refers to the portion of the winding 32 that is wound around the pole tooth portion 28B. In addition, the portion of the winding 32 that forms the coil 34 and is arranged along the pole tooth portion 28B in the axial direction is called a conductor portion 32A. The conductor portion 32A extends approximately linearly in the axial direction on one side and the other side of the circumferential direction relative to the pole tooth portion 28B.

[0033] In addition, one end portion and the other end portion of the winding 32 are formed from a predetermined pole tooth portion 28B ( Figure 5The portions of the coil 34 formed by the pole tooth portion 28B shown in the figure, which are led out from one circumferential side and the other circumferential side toward one axial side, are respectively referred to as the first terminal portion 32B and the second terminal portion 32C. Figure 4C and Figure 5 As shown, the first terminal portion 32B and the second terminal portion 32C are led out from the coil 34 formed at a position corresponding to the central protrusion 30J where the slit groove 30K is formed.

[0034] In addition, if Figure 5 As shown, the portion of the winding 32 adjacent to the first terminal portion 32B and locked with the first winding locking portion 30E of the insulator 30 is called the first locking portion 32D. In addition, the portion of the winding 32 adjacent to the second terminal portion 32C and locked with the second winding locking portion 30F of the insulator 30 is called the second locking portion 32E. In addition, the first locking portion 32D and the second locking portion 32E are included in the coil 34. In addition, the first locking portion 32D and the second locking portion 32E become the conductor portion 32A. Moreover, by locking the first locking portion 32D of the winding 32 to the first winding locking portion 30E of the insulator 30, the first terminal portion 32B of the winding 32 is arranged at a predetermined position, and the posture of the first terminal portion 32B is maintained. In addition, by locking the second locking portion 32E of the winding 32 to the second winding locking portion 30F of the insulator 30, the second terminal portion 32C of the winding 32 is arranged at a predetermined position and the posture of the second terminal portion 32C is maintained. Figure 5 In the illustrated state, the first terminal portion 32B and the second terminal portion 32C are straight in the axial direction, but the first terminal portion 32B and the second terminal portion 32C may be bent radially outward.

[0035] In addition, if Figure 4C As shown, the portion of the winding 32 that connects the coils 34 is called the inter-coil connection portion 32F. The inter-coil connection portion 32F is arranged along the radially outer surface of the annular connection portion 30H of the insulator 30. Thus, in the stator 16 of the present embodiment, the inter-coil connection portion 32F continuously connects the coils 34 on the other side of the axial direction relative to the stator core 28 (in this example, it is arranged as a continuous wire continuous with the coil 34). In addition, a part of the inter-coil connection portion 32F becomes a cross portion 32G that is arranged in a manner that overlaps in the axial direction and crosses in the radial direction at a position adjacent to each coil 34. Due to the presence of the cross portion 32G, the winding 32 is wound and tightened (a state in which tension is applied to the winding 32). Thus, the tension acts in the direction in which the first locking portion 32D and the second locking portion 32E are respectively embedded in the first winding locking portion 30E and the second winding locking portion 30F.

[0036] exist Fig. 7A, a schematic diagram schematically showing each pole tooth portion 28B of the stator core portion 28 and each coil 34 of the U phase formed around each pole tooth portion 28B is shown. Here, each pole tooth portion 28B formed around the coil 34 of the U phase is referred to as pole tooth portion 28BU1, pole tooth portion 28BU2, pole tooth portion 28BU3, and pole tooth portion 28BU4 in order from the other side to the one side in the circumferential direction. In addition, each pole tooth portion 28B formed around the coil 34 of the V phase is referred to as pole tooth portion 28BV1, pole tooth portion 28BV2, pole tooth portion 28BV3, and pole tooth portion 28BV4 in order from the other side to the one side in the circumferential direction. In addition, each pole tooth portion 28B formed around the coil 34 of the W phase is referred to as pole tooth portion 28BW1, pole tooth portion 28BW2, pole tooth portion 28BW3, and pole tooth portion 28BW4 in order from the other side to the one side in the circumferential direction.

[0037] In addition, the coils 34 formed around the pole teeth 28BU1, the pole teeth 28BU2, the pole teeth 28BU3, and the pole teeth 28BU4 are respectively referred to as coils 34U1, coils 34U2, coils 34U3, and coils 34U4. The coils 34U1, coils 34U2, coils 34U3, and coils 34U4 are respectively formed around the pole teeth 28BU1, the pole teeth 28BU2, the pole teeth 28BU3, and the pole teeth 28BU4 through the following steps.

[0038] like Figure 5 and Fig. 7A As shown, first, the first locking portion 32D of the winding 32 is locked to the first winding locking portion 30E of the insulator 30. Here, in a state where the first locking portion 32D of the winding 32 is locked to the first winding locking portion 30E of the insulator 30, the first terminal portion 32B of the winding 32 is led out from the other side in the circumferential direction to the one side in the axial direction relative to the pole tooth portion 28BU1.

[0039] Next, the winding 32 is wound 6 times around the pole teeth 28BU1 and along the winding portion 30A of the insulator 30, with the first locking portion 32D of the winding 32 locked to the first winding locking portion 30E of the insulator 30. The number of turns 6T of the winding 32 wound along the winding portion 30A of the insulator 30 is indicated in parentheses at the end of the symbol representing the coil 34U1.

[0040] Next, after the winding wire 32 is arranged along the annular portion 28A of the insulator 30, the winding wire 32 is wound seven times around the pole teeth portion 28BU2 and along the winding portion 30A of the insulator 30. In addition, the number of turns 7T of the winding wire 32 wound along the winding portion 30A of the insulator 30 is marked in parentheses at the end of the symbol representing the coil 34U2.

[0041] Next, after the winding wire 32 is arranged along the annular portion 28A of the insulator 30, the winding wire 32 is wound seven times around the pole teeth portion 28BU3 and along the winding portion 30A of the insulator 30. In addition, the number of turns 7T of the winding wire 32 wound along the winding portion 30A of the insulator 30 is marked in parentheses at the end of the symbol representing the coil 34U3.

[0042] Next, after the winding wire 32 is arranged along the annular portion 28A of the insulator 30, the winding wire 32 is wound around the pole teeth 28BU4 and wound seven times along the winding portion 30A of the insulator 30. In addition, the number of turns 7T of the winding wire 32 wound along the winding portion 30A of the insulator 30 is marked in parentheses at the end of the symbol representing the coil 34U4.

[0043] Next, after the winding 32 is arranged along the annular portion 28A of the insulator 30, the second locking portion 32E of the winding 32 is locked to the second winding locking portion 30F of the insulator 30. Here, in a state where the second locking portion 32E of the winding 32 is locked to the second winding locking portion 30F of the insulator 30, the second terminal portion 32C of the winding 32 is led out from the circumferential side to the axial side relative to the pole tooth portion 28BU1.

[0044] Here, the number of conductor parts 32A of the coil 34U1 is described. At the location where the winding wire 32 is wound around the pole tooth part 28BU1 and along the winding part 30A of the insulator 30 for 6 turns, the number of conductor parts 32A is twelve. In addition, the coil 34U1 includes a first locking part 32D and a second locking part 32E as two conductor parts 32A. Therefore, the number of conductor parts 32A of the coil 34U1 is fourteen.

[0045] In addition, the number of conductor parts 32A of the coil 34U2 is described. At the location where the winding wire 32 is wound around the pole tooth part 28BU2 and along the winding part 30A of the insulator 30 for 7 turns, the number of conductor parts 32A is fourteen. In addition, the coil 34U2 does not include the first locking part 32D and the second locking part 32E as two conductor parts 32A. Therefore, the number of conductor parts 32A of the coil 34U2 is fourteen.

[0046] In addition, the number of conductor parts 32A of the coil 34U3 is described. At the location where the winding wire 32 is wound around the pole tooth part 28BU3 and wound 7 times along the winding part 30A of the insulator 30, the number of conductor parts 32A is fourteen. In addition, the coil 34U3 does not include the first locking part 32D and the second locking part 32E as two conductor parts 32A. Therefore, the number of conductor parts 32A of the coil 34U3 is fourteen.

[0047] In addition, the number of conductor parts 32A of the coil 34U4 is described. At the location where the winding wire 32 is wound around the pole tooth part 28BU4 and along the winding part 30A of the insulator 30 for 7 turns, the number of conductor parts 32A is fourteen. In addition, the coil 34U4 does not include the first locking part 32D and the second locking part 32E as two conductor parts 32A. Therefore, the number of conductor parts 32A of the coil 34U4 is fourteen.

[0048] As described above, in the present embodiment, the number of the conductor portions 32A constituting the coil 34U1 , the coil 34U2 , the coil 34U3 , and the coil 34U4 of the U phase is the same number of fourteen.

[0049] Although description is omitted, the four coils 34 constituting the V phase and the four coils 34 constituting the W phase also have the same structure as the coil 34U1 , the coil 34U2 , the coil 34U3 , and the coil 34U4 constituting the U phase.

[0050] like Figure 3A As shown, in the state where the stator 16 is assembled, the first end portion 32B as the starting winding portion and the second end portion 32C as the ending winding portion of the winding 32 forming the U-phase coil 34, the first end portion 32B as the starting winding portion and the second end portion 32C as the ending winding portion of the winding 32 forming the V-phase coil 34, and the first end portion 32B as the starting winding portion and the second end portion 32C as the ending winding portion of the winding 32 forming the W-phase coil 34 are respectively led out from the U-phase coil 34, the V-phase coil 34, and the W-phase coil 34 adjacent in the circumferential direction. Figure 7B As shown, the first end portion 32B of each winding 32 forming the coil 34 of each phase and the second end portion 32C of each winding 32 forming the coil 34 of each phase are connected via three connection terminals 38. Thus, each coil 34 constituting the U phase, each coil 34 constituting the V phase, and each coil 34 constituting the W phase are connected in a delta connection.

[0051] In addition, if Figure 1 As shown, the stator 16 described above is fixed to the peripheral wall portion 12B in a state of being arranged radially inside the peripheral wall portion 12B of the housing 12 .

[0052] (Functions and Effects of the Present Embodiment) Next, the operation and effects of this embodiment will be described.

[0053] like Figure 1 As shown, in the electric motor 10 of the present embodiment described above, the stator 16 can rotate the rotor 14 by generating a rotating magnetic field.

[0054] Here, if Figure 3A , Figure 4A and Figure 5 As shown, in the stator 16 of the electric motor 10 of the present embodiment, the first terminal portion 32B and the second terminal portion 32C, in other words, the winding start end portion and the winding end end portion of the winding wire 32 forming the coil 34 of each phase are respectively led out from the other side and one side of the circumferential direction of the same coil 34. Thus, compared with a structure in which the first terminal portion 32B and the second terminal portion 32C of the winding wire 32 forming the coil 34 are respectively led out from different coils 34, the first terminal portion 32B and the second terminal portion 32C of the winding wire 32 forming the coil 34 can be concentrated at one position in the circumferential direction. In addition, in the present embodiment, the first terminal portion 32B and the second terminal portion 32C of the winding wire 32 forming the coil 34 of each phase are configured to be led out from three coils 34 adjacent in the circumferential direction. Thus, the first terminal portion 32B and the second terminal portion 32C of the winding wire 32 forming the coil 34 of each phase can be concentrated within the range of three coils 34 adjacent in the circumferential direction.

[0055] In the stator 16 of the motor 10 of the present embodiment, the number of conductor portions 32A of all coils 34 is the same, 14. This can reduce vibration and noise of the motor 10 compared to a configuration including coils 34 having different numbers of conductor portions 32A.

[0056] In addition, if Figure 3A and Figure 4A As shown, in the stator 16 of the motor 10 of the present embodiment, the four core components 36 having the pole teeth 28B formed by the coil 34 of the U phase are connected via the insulator 30. In addition, the four core components 36 having the pole teeth 28B formed by the coil 34 of the V phase are connected via the insulator 30. In addition, the four core components 36 having the pole teeth 28B formed by the coil 34 of the W phase are connected via the insulator 30. Thus, the assembly work of the stator 16 can be easily performed.

[0057] In addition, if Figure 5 As shown, in the stator 16 of the motor 10 of the present embodiment, by locking the first locking portion 32D of the winding 32 to the first winding locking portion 30E of the insulator 30, the first terminal portion 32B of the winding 32 is arranged at a predetermined position, and the posture of the first terminal portion 32B is maintained. In addition, by locking the second locking portion 32E of the winding 32 to the second winding locking portion 30F of the insulator 30, the second terminal portion 32C of the winding 32 is arranged at a predetermined position, and the posture of the second terminal portion 32C is maintained. In this structure, it is possible to suppress the deformation of the portion of the winding 32 that forms the coil 34 when the first terminal portion 32B and the second terminal portion 32C of the winding 32 are connected.

[0058] In addition, in the stator 16 of the electric motor 10 of the present embodiment, the first winding locking portion 30E and the second winding locking portion 30F, which are respectively locked with the first locking portion 32D and the second locking portion 32E of the winding 32, are provided on both sides of the flange portion 30D of the insulator 30 (the first insulator portion 31A) in the circumferential direction. As a result, in the insulator 30, it is not necessary to make the portions respectively locked with the first locking portion 32D and the second locking portion 32E of the winding 32 protrude in the axial direction, and thus it is possible to suppress the increase in the axial dimension of the stator 16. In addition, since the first locking portion 32D and the second locking portion 32E of the winding 32 are in the same direction as the conductor portion 32A of the coil 34 and are maintained around the stator core 28, the first locking portion 32D and the second locking portion 32E themselves can also contribute as conductor portions.

[0059] In addition, if Figure 4A and Fig. 7A As shown, in the stator 16 of the motor 10 of this embodiment, the coil connection portion 32F as a part of the winding 32 connects the coils 34 on the other side of the stator core 28 in the axial direction. Figure 1 and Figure 2A As shown, the coil connection portion 32F or the annular connection portion 30H is configured to be located on the bottom wall portion 12A side of the housing 12, so when the rotor 14 is assembled to the housing 12, the rotor body 20 can be prevented or suppressed from contacting the coil connection portion 32F or the annular connection portion 30H.

[0060] In addition, if Figure 4C As shown, in the stator 16 of the motor 10 of this embodiment, the coil connection portion 32F, which is a part of the winding 32, becomes the intersection portion 32G. Figure 4C and Figure 5 As shown, the winding 32 is wound and tightened at the intersection 32G (a state in which tension is applied to the winding 32), and the slack of the winding 32 in the range from the first locking portion 32D to the second locking portion 32E can be prevented or suppressed. In addition, the tension generated in the winding 32 acts in a manner that the first locking portion 32D and the second locking portion 32E are respectively embedded in the first winding locking portion 30E and the second winding locking portion 30F. As a result, it is possible to prevent or suppress the first locking portion 32D from being separated from the first winding locking portion 30E and the second locking portion 32E from being separated from the second winding locking portion 30F.

[0061] In addition, in the present embodiment, an example is described in which the coil-to-coil connection portion 32F as a part of the winding 32 connects the coils 34 on the other axial side relative to the stator core 28, but the present disclosure is not limited to this. Depending on the structure of the housing 12 and the rotor 14, the coil-to-coil connection portion 32F as a part of the winding 32 may also connect the coils 34 on one axial side relative to the stator core 28. In addition, in the present embodiment, an example is described in which the rotor 14 has eight magnets 26 fixed to the radially outer surface of the rotor core 24, but the present disclosure is not limited to this. For example, an annular magnet in which the N pole and the S pole are alternately arranged in the circumferential direction may also be a rotor 14 fixed to the radially outer surface of the rotor core 24. In this case, the magnet is preferably a resin magnet (bonded magnet).

[0062] In addition, in the present embodiment, an example is described in which the first winding locking portion 30E and the second winding locking portion 30F respectively locked with the first locking portion 32D and the second locking portion 32E of the winding 32 are provided in the flange portion 30D of the insulator 30, but the present disclosure is not limited thereto. For example, the first winding locking portion 30E and the second winding locking portion 30F respectively locked with the first locking portion 32D and the second locking portion 32E of the winding 32 may be provided in other parts of the insulator 30. In addition, it is also possible to have a structure in which only one of the first winding locking portion 30E and the second winding locking portion 30F is provided, or it is also possible to have a structure in which the first winding locking portion 30E and the second winding locking portion 30F are not provided.

[0063] In addition, in the present embodiment, the stator core 28 is described as a divided structure formed of a plurality of core configuration portions 36 , but the present disclosure is not limited thereto. For example, a structure in which the stator core 28 is not divided in the circumferential direction may be adopted.

[0064] In addition, in this embodiment, by using Fig. 7A In the steps described, an example of forming a coil 34 in which the number of conductor portions 32A is fourteen is described, but the present disclosure is not limited to this. The number of conductor portions 32A of the coil 34 can be appropriately set in consideration of the output required by the motor 10, etc. Below, a part of the manufacturing process of the stator 16 of the motor of the second embodiment in which the number of conductor portions 32A in one pole tooth portion is 40 is described. In addition, in the stator 16 of the motor of the second embodiment, the components and parts corresponding to the stator 16 of the motor of the first embodiment described above are marked with the same symbols as the components and parts corresponding to the stator 16 of the motor of the first embodiment.

[0065] like Figure 8As shown, in the manufacturing process of the stator 16 of the motor according to the second embodiment, the first locking portion 32D of the winding 32 is locked to the first winding locking portion 30E of the insulator 30 (see Figure 5 Here, when the first locking portion 32D of the winding 32 is locked to the first winding locking portion 30E of the insulator 30, the first terminal portion 32B, which is the winding start end of the winding 32 in the U phase, is led out from the other side in the circumferential direction to one side in the axial direction relative to the pole tooth portion 28BU1.

[0066] Next, after the winding 32 is arranged along the annular portion 28A of the insulator 30, the winding 32 is wound 20 times around the pole teeth portion 28BU2 and along the winding portion 30A of the insulator 30. In addition, the number of turns 20T of the winding 32 wound along the winding portion 30A of the insulator 30 is marked in parentheses at the end of the symbol representing the coil 34U2.

[0067] Next, after the winding wire 32 is arranged along the annular portion 28A of the insulator 30, the winding wire 32 is wound 20 times around the pole teeth portion 28BU3 and along the winding portion 30A of the insulator 30. In addition, the number of turns 20T of the winding wire 32 wound along the winding portion 30A of the insulator 30 is marked in parentheses at the end of the symbol representing the coil 34U3.

[0068] Next, after the winding 32 is arranged along the annular portion 28A of the insulator 30, the winding 32 is wound 20 times around the pole teeth 28BU4 and along the winding portion 30A of the insulator 30. In addition, the number of turns 20T of the winding 32 wound along the winding portion 30A of the insulator 30 is marked in parentheses at the end of the symbol representing the coil 34U4.

[0069] Then, if Fig. 9 As shown, after the winding 32 is arranged along the annular portion 28A of the insulator 30, the winding 32 is wound 19 times around the pole tooth portion 28BU1 and along the winding portion 30A of the insulator 30. In addition, the number of turns 19T of the winding 32 wound along the winding portion 30A of the insulator 30 is marked in parentheses at the end of the symbol representing the coil 34U1.

[0070] Next, the second locking portion 32E of the winding 32 is locked to the second winding locking portion 30F of the insulator 30 (see Figure 5 Here, when the second locking portion 32E of the winding 32 is locked to the second winding locking portion 30F of the insulator 30, the second terminal portion 32C, which is the winding end end of the winding 32 in the U phase, is led out from the circumferential side to the axial side relative to the pole tooth portion 28BU1.

[0071] Here, the number of conductor parts 32A of the coil 34U1 is described. At the location where the winding wire 32 is wound around the pole tooth part 28BU1 and along the winding part 30A of the insulator 30 for 19 turns, the number of conductor parts 32A is thirty-eight. In addition, the coil 34U1 includes a first locking part 32D and a second locking part 32E as two conductor parts 32A. Therefore, the number of conductor parts 32A of the coil 34U1 is forty.

[0072] In addition, the number of conductor parts 32A of the coil 34U2 is described. At the location where the winding wire 32 is wound around the pole tooth part 28BU2 and along the winding part 30A of the insulator 30 for 20 turns, the number of conductor parts 32A is 40. In addition, the coil 34U2 does not include the first locking part 32D and the second locking part 32E as two conductor parts 32A. Therefore, the number of conductor parts 32A of the coil 34U2 is 40.

[0073] In addition, the number of conductor parts 32A of the coil 34U3 is described. At the location where the winding wire 32 is wound around the pole tooth part 28BU3 and along the winding part 30A of the insulator 30 for 20 turns, the number of conductor parts 32A is 40. In addition, the coil 34U3 does not include the first locking part 32D and the second locking part 32E as two conductor parts 32A. Therefore, the number of conductor parts 32A of the coil 34U3 is 40.

[0074] In addition, the number of conductor parts 32A of the coil 34U4 is described. At the location where the winding wire 32 is wound around the pole tooth part 28BU4 and along the winding part 30A of the insulator 30 for 20 turns, the number of conductor parts 32A is 40. In addition, the coil 34U4 does not include the first locking part 32D and the second locking part 32E as two conductor parts 32A. Therefore, the number of conductor parts 32A of the coil 34U4 is 40.

[0075] As described above, in the present embodiment, the number of conductor portions 32A constituting the coil 34U1 , the coil 34U2 , the coil 34U3 , and the coil 34U4 of the U phase is the same number of forty.

[0076] Although description is omitted, the four coils 34 constituting the V phase and the four coils 34 constituting the W phase also have the same structure as the coil 34U1 , the coil 34U2 , the coil 34U3 , and the coil 34U4 constituting the U phase.

[0077] The stator 16 of the electric motor according to the present embodiment described above can also achieve the same effects as those of the stator 16 of the electric motor 10 according to the first embodiment described above.

[0078] In addition, the number of poles, the number of coils, the number of phases, the number of series connections, the number of parallel connections, etc. of the motor 10 described above can be appropriately set according to the purpose of the motor 10, etc. In addition, the structure of the motor 10, etc. can also be applied to a generator. In addition, the structure of the present disclosure can also be applied to a rotor composed of an armature to which the structure of the present disclosure is applied.

[0079] As mentioned above, one embodiment of the present disclosure has been described, but the present disclosure is not limited to the above, and it is of course possible to carry out various modifications other than the above without departing from the scope of the present disclosure.

[0080] In addition, although the present disclosure is described according to the embodiments, it should be understood that the present disclosure is not limited to the above-mentioned embodiments and structures. The present disclosure also includes various modifications and modifications within the equivalent range. In addition, various combinations and methods, and other combinations and methods including only one element, above or below them, also belong to the scope and thought range of the present disclosure.

[0081] <Note> (Note 1) An armature, the armature (16) comprising: An armature core (28) having a plurality of pole teeth (28B) arranged at intervals in the circumferential direction; A plurality of coils (34), wherein the plurality of coils are formed by winding conductive winding wires (32) around the plurality of pole teeth respectively; An inter-coil connection portion (32F), which is a part of the winding and connects the coils; a first terminal portion (32B) and a second terminal portion (32C), the first terminal portion and the second terminal portion being one terminal portion and the other terminal portion of the winding, and being led out from the other circumferential side and the one circumferential side of the coil formed around a predetermined one of the pole teeth toward one axial side, respectively; and A plurality of conductor parts (32A), which are parts of the winding that form the coils and are respectively arranged along the pole teeth and in the axial direction, and the number of conductor parts in each of the coils is set to be the same as each other. (Note 2) An armature according to Supplementary Note 1, wherein: The inter-coil connection portion connects the coils on the other side in the axial direction with respect to the armature core. (Note 3) The armature according to Supplement 1 or Supplement 2, wherein: The plurality of coils are composed of coils of three or more phases arranged in sequence along the circumferential direction. The first end portion and the second end portion of the winding forming the coil of one phase and the first end portion and the second end portion of the winding forming the coil of the other phase are respectively led out from the coil of one phase and the coil of the other phase adjacent in the circumferential direction. (Note 4) An armature according to Appendix 3, wherein: The armature core is composed of a plurality of core components (36) divided in the circumferential direction into a number corresponding to the number of the plurality of coils. The plurality of core components forming the coils of the same phase are connected via an insulator (30). (Note 5) An armature according to Supplementary Note 4, wherein: The insulator includes a winding locking portion (30E, 30F) for locking a portion of the winding. In a state in which a part of the winding wire is locked with the winding wire locking portion, the first terminal portion and the second terminal portion are arranged at predetermined positions. (Note 6) An armature according to Supplementary Note 5, wherein: The insulator includes: a winding portion (30A) around which the winding wire is wound; and a flange portion (30D) which protrudes from one radial side to one circumferential side and the other side relative to the winding portion, respectively, and the winding wire locking portion is formed on the flange portion. (Note 7) The armature according to any one of Appendix 1, Appendix 2, or Appendix 3 to 6 referring to Appendix 1 or Appendix 2, wherein: A part of the inter-coil connection portion is formed as an intersection portion (32G) which is arranged so as to overlap in the axial direction and intersect in the radial direction at a location adjacent to each of the coils. (Note 8) An armature according to Appendix 7, wherein: The inter-coil connecting portion is disposed in a state where tension is generated in the inter-coil connecting portion so that a part of the winding wire is urged toward the winding wire locking portion. (Note 9) A rotating electrical machine, the rotating electrical machine (10) comprising: One of a stator (16) and a rotor (14) including an armature according to any one of Supplementary Notes 1 to 8; and The other of the stator and the rotor has a magnet (26) arranged to face the armature in the radial direction.

Claims

1. An armature, the armature (16) comprising: an armature core (28) having a plurality of pole teeth (28B) arranged at intervals in the circumferential direction; a plurality of coils (34), wherein the plurality of coils are formed by winding conductive winding wires (32) around the plurality of pole teeth respectively; an inter-coil connection portion (32F), which is a part of the winding and connects the coils; a first terminal portion (32B) and a second terminal portion (32C), the first terminal portion and the second terminal portion being one terminal portion and the other terminal portion of the winding and being led out from the other circumferential side and the one circumferential side of the coil formed around a predetermined one of the pole teeth toward one axial side, respectively; and A plurality of conductor portions (32A) are portions of the winding that form the coils and are portions that are arranged along the pole teeth in the axial direction, respectively, and the number of conductor portions in each of the coils is set to be the same as each other.

2. The armature according to claim 1, characterized in that The inter-coil connection portion connects the coils on the other axial side with respect to the armature core.

3. The armature according to claim 1 or 2, characterized in that: The plurality of coils are composed of coils of three or more phases arranged in sequence along the circumferential direction. The first and second end portions of the windings forming the coil of one phase and the first and second end portions of the windings forming the coils of other phases are respectively led out from the coil of one phase and the coils of other phases adjacent in the circumferential direction.

4. The armature according to claim 3, characterized in that The armature core is composed of a plurality of core components (36) divided into a number corresponding to the number of the plurality of coils in the circumferential direction. The plurality of core configuration parts forming the coils of the same phase are connected via an insulator (30).

5. The armature according to claim 4, characterized in that The insulator includes a winding locking portion (30E, 30F) for locking a portion of the winding. In a state in which a part of the winding wire is locked with the winding wire locking portion, the first terminal portion and the second terminal portion are arranged at predetermined positions.

6. The armature according to claim 5, characterized in that The insulator includes: a winding portion (30A) around which the winding wire is wound; and a flange portion (30D) protruding from one radial side to one circumferential side and the other side, respectively, relative to the winding portion. The winding locking portion is formed on the flange portion.

7. The armature according to any one of claims 1 to 6, characterized in that A part of the inter-coil connection portion is formed as an intersection portion (32G) which is arranged so as to overlap in the axial direction and intersect in the radial direction at a location adjacent to each of the coils.

8. The armature according to claim 7, characterized in that The inter-coil connecting portion is arranged in a state where tension is generated in the inter-coil connecting portion so that a part of the winding is urged toward the winding locking portion.

9. A rotating electrical machine, the rotating electrical machine (10) comprising: One of a stator (16) and a rotor (14) comprising an armature according to any one of claims 1 to 8; as well as The other of the stator and the rotor has a magnet (26) arranged to face the armature in the radial direction.

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