Electric machines and electronic devices

Abstract

The electric motor (1) comprises a stator (4) provided with a terminal (6), and a busbar (5) provided on the stator (4) and having a hole portion (51H), a side of the hole portion (51H) of the busbar (5) being connected to a part (602) of the terminal (6).

Description

Technical Field

[0001] This invention relates to electric motors and electronic devices. Background Technology

[0002] Motors that use printed wiring boards to electrically connect coils and terminals are known (e.g., see Patent Document 1).

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Application Publication No. 2000-41371 Summary of the Invention

[0006] The problem that the invention aims to solve

[0007] However, in conventional motors, there is room for improvement in terms of stability when driving large currents through the coils.

[0008] In one aspect, the aim is to provide a motor and electronic device that can improve stability when driving a large current to flow through a coil.

[0009] In one embodiment, the motor includes: a stator having terminals; and a busbar disposed on the stator having a hole, the side of the hole of the busbar being connected to a portion of the terminals.

[0010] Solution for solving the problem

[0011] According to one approach, the motor can improve stability when driving the coil to allow a large current to flow through it. Attached Figure Description

[0012] Figure 1 This is a perspective view of the electronic device according to the first embodiment.

[0013] Figure 2 yes Figure 1 A top view of the motor of the electronic device shown.

[0014] Figure 3 yes Figure 2 The image shows a 3D view of the motor.

[0015] Figure 4 yes Figure 2 The diagram shows a three-dimensional view of the stator and terminals of the motor.

[0016] Figure 5 yes Figure 4 The circuit diagram shown represents the multiple coils of the stator.

[0017] Figure 6 yes Figure 5 The wiring diagram for the multiple coils shown is shown.

[0018] Figure 7 yes Figure 2 The diagram shows an exploded perspective view of the multiple busbars of the motor.

[0019] Figure 8 It means Figure 7 A three-dimensional view of the second busbar among the multiple busbars shown.

[0020] Figure 9 It means Figure 2 An enlarged sectional view of the busbars and terminals of the motor shown.

[0021] Figure 10 This indicates pressing the terminal into... Figure 9 An enlarged cross-sectional view of the state of the first hole of the busbar shown.

[0022] Figure 11 It means Figure 3 The diagram shows a perspective view of the first busbar being supported by terminals.

[0023] Figure 12 It means Figure 3 The diagram shows a perspective view of the second busbar being supported by terminals.

[0024] Figure 13 This is a top view of the motor included in the electronic device of the second embodiment.

[0025] Figure 14 yes Figure 13 The image shows a 3D view of the motor.

[0026] Figure 15 yes Figure 14 The circuit diagram shown represents the multiple coils of the stator.

[0027] Figure 16 yes Figure 15 The wiring diagram for the multiple coils shown is shown.

[0028] Figure 17 It is a 3D diagram representing the second busbar among multiple busbars.

[0029] Figure 18 It means Figure 14 The diagram shows a perspective view of the first busbar being supported by terminals.

[0030] Figure 19 It means Figure 14 The diagram shows a perspective view of the second busbar being supported by terminals.

[0031] Figure 20This is a top view of the motor included in the electronic device according to the third embodiment.

[0032] Figure 21 yes Figure 20 The image shows a 3D view of the motor.

[0033] Figure 22 yes Figure 21 The circuit diagram shown represents the multiple coils of the stator.

[0034] Figure 23 yes Figure 22 The wiring diagram for the multiple coils shown is shown.

[0035] Figure 24 It is a 3D diagram representing the second busbar of multiple busbars.

[0036] Figure 25 It means Figure 21 The diagram shows a perspective view of the second busbar being supported by terminals. Detailed Implementation

[0037] [First Implementation]

[0038] Hereinafter, the motor 1 and electronic device 100 of the embodiments will be described in detail based on the accompanying drawings. It should be noted that the dimensional relationships and ratios of the components in the drawings may sometimes differ from reality. The drawings may also contain parts where the dimensional relationships and ratios of each other differ.

[0039] Figure 1 This is a perspective view of the electronic device 100 according to the first embodiment. The electronic device 100 is, for example, a device mounted in a vehicle such as an electric vehicle or a hybrid vehicle. The electronic device 100 includes, for example, a motor 1, a housing 101 housing the motor 1, a first gear 102, and a second gear 103.

[0040] The first gear 102 is, for example, a worm gear, which rotates in conjunction with the shaft 2 of the motor 1. The second gear 103 is, for example, a helical gear that meshes with the first gear 102, and rotates in conjunction with the output shaft 104. Through this structure, the driving force of the shaft 2 of the motor 1 is transmitted to the output shaft 104 of the electronic device 100.

[0041] Next, use Figures 1-4 The structure of the motor 1 included in the electronic device 100 will be described. Figure 2 yes Figure 1 A top view of the motor 1 included in the electronic device 100 shown. Figure 3 yes Figure 2 The diagram shows a 3D view of motor 1. Figure 4 yes Figure 2 The diagram shows a perspective view of the stator 4 and terminals 6 of the motor 1. It should be noted that, in addition to... Figure 2 The rotor 3 is omitted from the diagrams. Furthermore, in... Figure 4 In the stator 4 shown, for ease of explanation, a portion of the iron core 40, a portion of the multiple insulators 42, and a portion of the multiple coils 43 are omitted.

[0042] In the description of the motor 1 and electronic device 100 in the embodiment, for ease of understanding of direction, the direction in which the shaft 2 extends is called the axial direction A, the direction in which the rotor 3 rotates is called the circumferential direction C, and the direction in which the axis 2o, which is contained in a plane orthogonal to the axial direction A and passes through the shaft 2, is orthogonal to the circumferential direction C is called the radial direction R.

[0043] This embodiment Figure 1 The motor 1 shown is an inner rotor type motor with the stator 4 located outside the radial direction R of the rotor 3 when viewed from the axial direction A, with the rotor 3 as the reference. Furthermore, the motor 1 is, for example, a three-phase motor (DC motor) electrically connected to a three-phase AC power supply.

[0044] In this embodiment, the motor 1 is, for example, an electric motor that converts electrical energy from a power source into a driving force for the shaft 2 to rotate in the circumferential direction C.

[0045] like Figure 2 As shown, the motor 1 includes, for example, a shaft 2, a rotor 3, a stator 4, a busbar 5, terminals 6, and an insulator 7. The shaft 2 is a so-called rotating shaft, for example formed from a metal component as a cylinder extending along an axial direction A. The shaft 2 has a center 2o and is configured to rotate about the center 2o. The shaft 2 transmits power to the outside by rotating in the circumferential direction C.

[0046] The rotor 3 is configured to rotate about the axis 2o of the shaft 2. Furthermore, in this embodiment, the motor 1 integrates the shaft 2 and the rotor 3 as a single unit.

[0047] The rotor 3 is, for example, arranged radially R inside the stator 4 (on the side of shaft 2). That is to say, the motor 1 is an inner rotor type brushless motor in which the rotor 3 is located inside the stator 4 in the radial direction R.

[0048] The rotor 3 has a magnetic yoke 31 as a magnetic body and a plurality of magnets 32. The magnetic yoke 31 is formed, for example, from a magnetic material such as iron.

[0049] The magnet 32 ​​is, for example, made of permanent magnets. Multiple magnets 32 are arranged, for example, along the circumferential direction C at predetermined intervals (e.g., equal intervals). The rotor 3 of this embodiment, for example, has fourteen magnets 32.

[0050] Stator 4 is the part that generates the force used to rotate rotor 3 in the circumferential direction C. For example... Figure 3 , Figure 4As shown, the stator 4 includes, for example, an iron core (annular portion) 40, multiple teeth (magnetic pole portions) 41, multiple insulators 42, and multiple coils 43.

[0051] The iron core 40 is formed, for example, by stacking plate-shaped magnetic materials (metal components) such as silicon steel plates, electromagnetic steel plates, and soft magnetic steel plates along the axial direction A, and has magnetism. The iron core 40 is formed into a ring shape when viewed from the axial direction A. Furthermore, in this embodiment, the stator 4 integrates the iron core 40 and the teeth 41 into one piece.

[0052] Each tooth 41 is formed to protrude radially from the inner circumference of the iron core 40 toward the rotor 3. The stator 4 in this embodiment, for example, has twelve teeth 41.

[0053] The insulator 42 is formed of, for example, an insulating resin, and is attached to the surface of the tooth 41 to ensure insulation between the tooth 41 and the coil 43. The stator 4 of this embodiment, for example, has twelve insulators 42.

[0054] The coil 43 is formed, for example, by winding a winding around a tooth 41 with an insulator 42 in between. The winding has a conductive core wire (not shown) and an insulating covering portion (not shown) surrounding the core wire. The stator 4 of this embodiment has, for example, twelve coils 43. Each coil 43 is electrically connected to the busbar 5 via a terminal 6.

[0055] Next, use Figure 5 , Figure 6 The electrical connections of the plurality of coils 43 in the motor 1 of this embodiment will be described. Figure 5 yes Figure 4 The circuit diagram shown is of the multiple coils 43 of the stator 4. Figure 6 yes Figure 5 The wiring diagram of the multiple coils 43 shown.

[0056] The stator 4 includes multiple (four in this embodiment) first coils 43U constituting the U phase of the motor 1, multiple (four in this embodiment) second coils 43V constituting the V phase of the motor 1, and multiple (four in this embodiment) third coils 43W constituting the W phase of the motor 1.

[0057] The U phase of motor 1 is composed of four first coils 43U connected in parallel. The V phase of motor 1 is composed of four second coils 43V connected in parallel. The W phase of motor 1 is composed of four third coils 43W connected in parallel.

[0058] Furthermore, the U-phase, V-phase, and W-phase of motor 1 are electrically connected, for example, via a star connection. Additionally, an AC power supply (not shown) connected to these coils 43 is also electrically connected, for example, via a star connection.

[0059] In the motor 1 of this embodiment, as Figure 6 As shown, by concentrating the two wires connected to the first busbar 51 in one location, the number of terminals 6 can be reduced.

[0060] Next, use Figure 7 , Figure 8 , Figure 9 , Figure 10 The busbar 5 of the motor 1 in this embodiment will be described. Figure 7 yes Figure 2 An exploded perspective view of the multiple busbars 5 of the motor 1 shown. Figure 8 It means Figure 7 A three-dimensional view of the second mother row 52 among the multiple mother rows 5 shown.

[0061] Figure 7 Each of the busbars 5 shown is, for example, formed of a conductive metal. The busbars 5 are electrically connected to one coil 43 and another coil 43, for example, via terminals 6. The busbars 5 have a large cross-sectional area, so even when the motor 1 is driven, the deformation caused by heat is slight, thus allowing a large current to flow stably.

[0062] The plurality of busbars 5 include a first busbar 51 located on one side of axis A with reference to an insulator 7 and a second busbar 52 located on the other side of axis A. In other words, the insulator 7 is disposed between the first busbar 51 and the second busbar 52 in axis A.

[0063] The first busbar 51 connects the first coil 43U, constituting phase U, and the neutral point NP via terminal 6; it also connects the second coil 43V, constituting phase V, and the neutral point NP via terminal 6; and the third coil 43W, constituting phase W, and the neutral point NP via terminal 6 (see reference). Figure 5 ).

[0064] The first busbar 51 has a main body 51a extending circumferentially C and a protrusion 51b protruding outward from the main body 51a toward the radial R.

[0065] The second busbar 52 is electrically connected to each coil 43 constituting the U phase, V phase and W phase via terminal 6.

[0066] The second busbar 52 has a first shape 521, a second shape 522 and a third shape 523 that are different from each other.

[0067] The first shape 521 has a main body 521a extending in the circumferential direction C, a protrusion 521b protruding outward from the main body 521a toward the radial direction R, and an external connecting terminal 521c protruding from the main body 521a toward the other side in the axial direction A. Furthermore, the main body 521a of the first shape 521 has a lower portion 21L, a portion 21H higher than the lower portion 21L, and a step portion 21S located between the lower portion 21L and the higher portion 21H in the axial direction A.

[0068] The second shape 522 has a main body 522a extending in the circumferential direction C, a protrusion 522b protruding outward from the main body 522a toward the radial direction R, and an external connecting terminal 522c protruding from the main body 522a toward the other side in the axial direction A. In addition, the main body 522a of the second shape 522 has a lower portion 22L and a portion 22H that is higher than the lower portion 22L in the axial direction A.

[0069] The third shape 523 has a main body 523a extending in the circumferential direction C, a protrusion 523b protruding outward from the main body 523a toward the radial direction R, and an external connecting terminal 523c protruding from the main body 523a toward the other side in the axial direction A. In addition, the main body 523a of the third shape 523 has a lower portion 23L, a portion 23H higher than the lower portion 23L, and a step portion 23S located between the lower portion 23L and the higher portion 23H in the axial direction A.

[0070] Figure 7 , Figure 8 The protrusions 51b, 521b, 522b, and 523b shown each have a hole 5H formed along axial direction A, which respectively penetrates the side surface of the protrusions 51b, 521b, 522b, and 523b. The hole 5H opens along axial direction A and, when viewed from axial direction A, forms a periphery (inner periphery) in the protrusions 51b, 521b, 522b, and 523b, for example. It should be noted that, hereinafter, the hole penetrates the side surface of the specified component and forms a periphery (inner periphery) in the specified component.

[0071] The hole portion 5H includes a first hole portion 51H for inserting the terminal 6 and a pin 7P for holding each busbar 5 to the insulator 7 (see reference). Figure 3 The second hole 52H is inserted. When viewed from axial direction A, as shown... Figure 2 As shown, the size (diameter) of the second hole 52H is larger than the size (size) of the first hole 51H, forming different sizes.

[0072] The axial thickness A of busbar 5 is relatively large. Therefore, compared with the case of using a flexible printed circuit board, the resistance at the contact point between the side of the hole 5H of busbar 5 and the terminal 6 can be reduced. In addition, since busbar 5 and terminal 6 are in direct contact, no other components are required, thus reducing the number of components.

[0073] like Figure 8 As shown, the first shape 521 and the second shape 522 are located at a position where they overlap in the axial direction A, the second shape 522 and the third shape 523 are located at a position where they overlap in the axial direction A, and the third shape 523 and the first shape 521 are located at a position where they overlap in the axial direction A.

[0074] Next, use Figure 8 The overlap of the first shape 521, the second shape 522, and the third shape 523 along axis A is explained.

[0075] Along axis A, the higher portion 21H of the first shape 521 overlaps with the lower portion 22L of the second shape 522. It should be noted that the higher portion 22H of the second shape 522 may also overlap with the lower portion 21L of the first shape 521.

[0076] Along axis A, the higher portion 22H of the second shape 522 overlaps with the lower portion 23L of the third shape 523. It should be noted that the higher portion 23H of the third shape 523 may also overlap with the lower portion 22L of the second shape 522.

[0077] Along axis A, the higher portion 23H of the third shape 523 overlaps with the lower portion 21L of the first shape 521. It should be noted that it is also possible for the higher portion 21H of the first shape 521 to overlap with the lower portion 23L of the third shape 523.

[0078] Next, use Figure 9 and Figure 10 Terminal 6 will be described. Figure 9 It means Figure 2 An enlarged cross-sectional view of the busbar 5 and terminal 6 of the motor 1 shown. Figure 10 This indicates that terminal 6 is pressed into... Figure 9 An enlarged cross-sectional view of the state of the first hole 51H of the busbar 5 shown.

[0079] Terminal 6 is formed, for example, of a conductive metal material and is shaped to extend along an axial direction A. One side of terminal 6 along axial direction A is electrically connected to any one of the coils 43, and the other side of terminal 6 along axial direction A is electrically connected to any one of the busbars 5. Terminal 6 is a so-called press-fit terminal. Furthermore, terminal 6 and coil 43 are electrically connected by soldering.

[0080] Terminal 6 has a main body 601 and a connecting portion 602 formed on the other side of the main body 601 along the axial direction A and electrically connected to the busbar 5. The connecting portion 602 extends along the axial direction A.

[0081] The connecting portion 602 has two protrusions 602a arranged adjacent to the other side of the axial direction A of the main body portion 601, and a deformable portion 602b arranged adjacent to the other side of the axial direction A of the protrusions 602a.

[0082] A pair of protrusions 602a protrude from the main body 601 in a manner that they are separated from each other in the circumferential direction C. The front end (end) of the deformable portion 602b is formed into a shape that tapers from one side to the other in the axial direction A, and the width of the front end of the deformable portion 602b in the circumferential direction C gradually narrows. In addition, the deformable portion 602b has a through hole 602H that passes through the connecting portion 602 in the radial direction R. The end of the through hole 602H on the axial direction A side extends beyond the end of the connecting portion 602 on the axial direction A to the position of the protrusion 602a. Furthermore, in the circumferential direction C, the width W1 of the deformable portion 602b is slightly wider than the width W2 of the hole 51H of the busbar 5.

[0083] Next, the electrical connection between terminal 6 and busbar 5 will be explained. First, the operator inserts the front end of the connecting portion 602 of terminal 6 into the first hole 51H of busbar 5 by moving busbar 5 axially A relative to terminal 6. Next, the operator presses the connecting portion 602 of terminal 6 into the hole 51H of busbar 5, thereby deforming the width W3 of deformable portion 602b to be slightly narrower than the original width W1, so that the side of the first hole 51H contacts the outer peripheral surface of the connecting portion (part) 602 of terminal 6. Therefore, terminal 6 and busbar 5 are electrically connected. Furthermore, busbar 5 is supported on stator 4 via terminal 6. In addition, when the connecting portion 602 of terminal 6 is inserted into the first hole 51H of busbar 5 to a predetermined length axially A, the lower surface (side) of busbar 5 contacts the pair of protrusions 602a of terminal 6. Therefore, the length of the terminal 6 protruding from the upper surface (side) of the busbar 5 is constant among the multiple terminals 6, and the position of the busbar 5 relative to the stator 4 in the axial direction A is determined.

[0084] Next, the support of terminal 6 to busbar 5 will be explained. Figure 11 It means Figure 3 The diagram shows a perspective view of the first busbar 51 supported by terminal 6. Figure 12 It means Figure 3 The diagram shows a perspective view of the second busbar 52 supported by terminal 6. It should be noted that, for ease of explanation, Figure 11 The second mother row 52 is omitted, and Figure 12 The first mother row 51 is omitted.

[0085] Terminal 6 includes a first terminal 61 and a second terminal 62. The first terminal 61 electrically connects the neutral point NP and any one of the coils 43 via a first busbar 51. The second terminal 62 electrically connects any one of the following coils to the second busbar 52: the first coil 43U constituting phase U, the second coil 43V constituting phase V, or the third coil 43W constituting phase W. For example... Figure 11 As shown, the axial length A of the second terminal 62 is longer than the axial length A of the first terminal 61.

[0086] The second terminal 62 includes a first shape 621 and a second shape 622 whose axial length A is longer than that of the first shape 621.

[0087] Insulator 7 is formed, for example, from a resin having insulating properties. Figure 2 As shown, when viewed from the axial direction A, the insulator 7 of this embodiment includes a main body portion 71 which is formed as an annular portion and a wall portion 72 which is a portion protruding from the main body portion 71 to the other side of the axial direction A.

[0088] As explained above, the motor 1 of this embodiment includes: a stator 4 having terminals 6; and a busbar 5 provided on the stator 4 having a first hole 51H, the side of the first hole 51H of the busbar 5 being connected to a connection portion (part) 602 of the terminal 6.

[0089] Furthermore, in the motor 1 of this embodiment, the first hole 51H of the busbar 5 opens in the axial direction A, and the connection portion (part) 602 of the terminal 6 extends along the axial direction A.

[0090] Furthermore, in the motor 1 of this embodiment, the busbar 5 is supported on the stator 4 via the terminal 6.

[0091] Furthermore, in the motor 1 of this embodiment, the stator 4 includes a first busbar 51, a second busbar 52, a first terminal 61, and a second terminal 62, and the connecting portion (partial portion) 602 of the second terminal 62 is electrically connected to the hole portion 51H of the second busbar 52.

[0092] Furthermore, in the motor 1 of this embodiment, the stator 4 has a plurality of coils 43, and the second busbar 52 is electrically connected to the coils 43 via terminals 6.

[0093] Furthermore, in the motor 1 of this embodiment, there are a plurality of second busbars 52, including a second busbar 52, among which two second busbars 52 are located at overlapping positions in the axial direction A. Each of the two second busbars 52 has a lower portion 21L, 22L, a higher portion 21H, 22H than the lower portion 21L, 22L, and a stepped portion 21S, 22S in the axial direction A. In the axial direction A, the lower portion 22L of one of the two second busbars 52 overlaps with the higher portion 21H of the other second busbar 52.

[0094] Furthermore, in the axial direction A of the motor 1 in this embodiment, the insulator 7 is disposed between the first busbar 51 and the second busbar 52.

[0095] In addition, the electronic device 100 includes the motor 1 described above and the housing 101 that houses the motor 1.

[0096] In addition, the electronic device 100 includes the aforementioned motor 1 and one or more gears 102, 103.

[0097] [Second Implementation]

[0098] Next, use Figure 13 , Figure 14 The general structure of the motor 1A in the second embodiment will be described. Figure 13 This is a top view of the motor 1A included in the electronic device 100 of the second embodiment. Figure 14 yes Figure 13 The diagram shows a 3D view of motor 1A.

[0099] The main difference between the motor 1A in this embodiment and the motor 1A in the first embodiment is the connection of the coil 43 in the stator 4A, which differs from the connection of the coil 43 in the stator 4 of the motor 1 in the first embodiment. Various modifications have been made to each part. It should be noted that in the structure of the motor 1A in the second embodiment, the same markings are used for structures identical to those in the motor 1 of the first embodiment, and the descriptions are omitted. Furthermore, the rotor 3 is omitted from the figures of the motor 1A in the second embodiment.

[0100] like Figure 13 As shown, motor 1A includes, for example, a shaft 2, a rotor 3, a stator 4A, a busbar 5A, a terminal 6A, and an insulator 7.

[0101] like Figure 14 As shown, the stator 4A includes, for example, an iron core (ring-shaped portion) 40, multiple teeth (magnetic pole portions) 41, multiple insulators 42, and multiple coils 43.

[0102] Next, use Figure 15 , Figure 16 The electrical connections of the plurality of coils 43 in the motor 1A of this embodiment will be described. Figure 15 yes Figure 14 The circuit diagram shown is of the multiple coils 43 of the stator 4A. Figure 16 yes Figure 15 The wiring diagram of the multiple coils 43 shown.

[0103] The stator 4A includes multiple (four in this embodiment) first coils 43U constituting the U phase of the motor 1A, multiple (four in this embodiment) second coils 43V constituting the V phase of the motor 1A, and multiple (four in this embodiment) third coils 43W constituting the W phase of the motor 1A.

[0104] The U phase of motor 1A is formed by connecting two of the four first coils 43U in series and connecting the two first coils 43U in parallel.

[0105] The V phase of motor 1A is formed by connecting two of the four second coils 43V in series and connecting the two series-connected second coils 43V in parallel.

[0106] The W phase of motor 1A is formed by connecting two of the four third coils 43W in series and connecting the two series-connected third coils 43W in parallel.

[0107] Furthermore, the U-phase, V-phase, and W-phase of motor 1A are electrically connected, for example, via a star connection. Additionally, an AC power supply (not shown) connected to these coils 43 is also electrically connected, for example, via a star connection.

[0108] Next, use Figure 17 , Figure 18 , Figure 19 The plurality of busbars 5A of the motor 1A in this embodiment will be described. Figure 17 This is a three-dimensional diagram representing the second busbar 52A among multiple busbars 5A. Figure 18 It means Figure 14 The diagram shows a perspective view of the first busbar 51A being supported by terminal 6A. Figure 19 It means Figure 14 The diagram shows a perspective view of the second busbar 52A supported by terminal 6A. It should be noted that, for ease of explanation, Figure 18 The second motherboard 52A is omitted. Figure 19 The first motherboard 51A is omitted.

[0109] Busbar 5A has a first busbar 51A and multiple second busbars 52A. For example... Figure 15As shown, the first busbar 51A connects the first coil 43U, which constitutes the U phase, to the neutral point NP via terminal 6A, and connects the second coil 43V, which constitutes the V phase, to the neutral point NP via terminal 6A, and connects the third coil 43W, which constitutes the W phase, to the neutral point NP via terminal 6A. Figure 18 The first busbar 51A shown has a main body 51a and a protrusion 51b.

[0110] like Figure 15 As shown, the second busbar 52A is electrically connected to each coil 43 constituting the U phase, V phase and W phase via terminal 6A.

[0111] like Figure 17 As shown, the second busbar 52A has a first shape 521A, a second shape 522A and a third shape 523A that are different from each other.

[0112] The first shape 521A has a main body 521a, a protrusion 521b, and an external connection terminal 521c. Furthermore, the main body 521a of the first shape 521 has a low portion 21L, a high portion 21H, and a stepped portion 21S in the axial direction A.

[0113] The second shape 522A has a main body 522a, a protrusion 522b, and an external connection terminal 522c. Furthermore, the main body 522a of the second shape 522 has a low portion 22L, a high portion 22H, and a stepped portion 22S in the axial direction A.

[0114] The third shape 523A has a main body 523a, a protrusion 523b, and an external connection terminal 523c. Furthermore, the main body 523a of the third shape 523 has a low portion 23L, a high portion 23H, and a stepped portion 23S in the axial direction A.

[0115] exist Figure 17 , Figure 18 Each of the protrusions 51b, 521b, 522b, and 523b shown has a hole 5H formed in the axial direction A, which passes through the side of the protrusions 51b, 521b, 522b, and 523b respectively.

[0116] Hole portion 5H includes a first hole portion 51H and a second hole portion 52H. For example... Figure 17 As shown, the first shape 521A and the second shape 522A are located at a position where they overlap in the axial direction A, the second shape 522A and the third shape 523A are located at a position where they overlap in the axial direction A, and the third shape 523A and the first shape 521A are located at a position where they overlap in the axial direction A.

[0117] Next, the overlap of the first shape 521A, the second shape 522A, and the third shape 523A along axis A will be explained.

[0118] Along axis A, the higher portion 21H of the first shape 521A overlaps with the lower portion 22L of the second shape 522A.

[0119] Along axis A, the higher portion 22H of the second shape 522A overlaps with the lower portion 23L of the third shape 523A.

[0120] Along axis A, the higher portion 23H of the third shape 523A overlaps with the lower portion 21L of the first shape 521A.

[0121] Next, use Figure 18 and Figure 19 The structure of terminal 6A is described below. Terminal 6A includes the structure of terminal 6 and has a protrusion 603 that protrudes circumferentially C from the side of the main body 601. The protrusion 603 electrically connects one terminal 6A to another terminal 6A via a wire W (see reference). Figure 15 , Figure 16 , Figure 18 Therefore, compared with the motor 1 of the first embodiment, the number of terminals 6A can be reduced in the motor 1A of this embodiment.

[0122] [Third Implementation]

[0123] Next, use Figure 20 , Figure 21 The general structure of the motor 1B in the third embodiment will be described. Figure 20 This is a top view of the motor 1B included in the electronic device 100 of the third embodiment. Figure 21 yes Figure 20 The diagram shows a 3D view of motor 1B.

[0124] The main difference between the motor 1B in this embodiment and the motor 1B in the first embodiment is the connection of the coil 43 in the stator 4B, which differs from the connection of the coil 43 in the stator 4 of the motor 1 in the first embodiment. Various modifications have been made to each part. It should be noted that in the structure of the motor 1B in the third embodiment, the same markings are used for structures identical to those in the motor 1 of the first embodiment and the motor 1A of the second embodiment, and the descriptions are omitted. Furthermore, in the figures of the motor 1B in the third embodiment, the rotor 3 is omitted.

[0125] like Figure 20 As shown, motor 1B includes, for example, a shaft 2, a rotor 3, a stator 4B, a busbar 5B, a terminal 6A, and an insulator 7.

[0126] like Figure 21 As shown, the stator 4B includes, for example, an iron core (annular portion) 40, multiple teeth (magnetic pole portions) 41, multiple insulators 42, and multiple coils 43.

[0127] Next, use Figure 22 , Figure 23 The electrical connections of the plurality of coils 43 in the motor 1B of this embodiment will be described. Figure 22 yes Figure 21 The circuit diagram shown is of the multiple coils 43 of the stator 4B. Figure 23 yes Figure 22 The wiring diagram of the multiple coils 43 shown.

[0128] The stator 4B includes multiple (four in this embodiment) first coils 43U constituting the U phase of the motor 1B, multiple (four in this embodiment) second coils 43V constituting the V phase of the motor 1B, and multiple (four in this embodiment) third coils 43W constituting the W phase of the motor 1B.

[0129] The U phase of motor 1B is formed by directly connecting two of the four first coils 43U and connecting the two first coils 43U connected in series in parallel.

[0130] The V phase of motor 1B is formed by directly connecting two of the four second coils 43V and connecting the two second coils 43V connected in series in parallel.

[0131] The W phase of motor 1B is formed by directly connecting two of the four third coils 43W and connecting the two third coils 43W connected in series in parallel.

[0132] Furthermore, the U-phase, V-phase, and W-phase of motor 1B are electrically connected, for example, via delta connection. Additionally, an AC power supply (not shown) connected to these coils 43 is also electrically connected, for example, via delta connection.

[0133] Next, use Figure 24 , Figure 25 The plurality of busbars 5B of the motor 1B in this embodiment will be described. Figure 24 This is a three-dimensional diagram representing the second busbar 52B of multiple busbars 5B. Figure 25 It means Figure 21 The diagram shows a perspective view of the second busbar 52A being supported by terminal 6A.

[0134] Busbar 5B has only a plurality of second busbars 52B. The second busbars 52B are electrically connected to the respective coils 43 constituting phase U, phase V and phase W via terminal 6A.

[0135] The second busbar 52B has a first shape 521B, a second shape 522B, and a third shape 523B, each with a different shape.

[0136] Figure 24The protrusions 521b, 522b, and 523b shown each have a hole 5H that passes through the protrusions 521b, 522b, and 523b respectively in the axial direction A.

[0137] Hole 5H includes a second hole 52H. For example... Figure 24 As shown, the first shape 521B and the second shape 522B are located at an overlapping position along axis A, the second shape 522B and the third shape 523B are located at an overlapping position along axis A, and the third shape 523B and the first shape 521B are located at an overlapping position along axis A.

[0138] Next, the overlap of the first shape 521B, the second shape 522B and the third shape 523B along axis A will be explained.

[0139] Along the axial direction A, the protrusion 521b protruding from the high portion 21H of the first shape 521B overlaps with the low portion 22L of the second shape 522B.

[0140] Along the axial direction A, the protrusion 522b protruding from the high portion 22H of the second shape 522B overlaps with the low portion 23L of the third shape 523B.

[0141] Along the axial direction A, the protrusion 523b protruding from the high portion 23H of the third shape 523B overlaps with the low portion 21L of the first shape 521B.

[0142] In the motor 1B of this embodiment, for example Figure 25 As shown, a terminal 6A with a protrusion 603 is used.

[0143] It should be noted that the motors 1, 1A, and 1B of the first to third embodiments described above are mounted on vehicles such as electric vehicles or hybrid vehicles. However, the motors 1, 1A, and 1B of this embodiment are not limited to vehicles and can also be used in other devices.

[0144] Furthermore, the motors 1, 1A, and 1B described in the first to third embodiments above have twelve coils 43 and twelve teeth 41. However, in the motors 1, 1A, and 1B of this embodiment, the number of coils 43 and the number of teeth 41 are not limited to these and can be appropriately increased or decreased.

[0145] The first, second, and third embodiments of the motors 1, 1A, 1B, etc., of the present invention have been described above. However, the present invention is not limited to these embodiments, and various modifications can be made without departing from the spirit of the present invention. Solutions constructed by appropriately combining the constituent elements of the above embodiments are also included in the present invention. Such solutions with various modifications made without departing from the spirit of the present invention are also included within the technical scope of the present invention, which will be obvious to those skilled in the art from the description of the claims.

[0146] Explanation of reference numerals in the attached figures

[0147] 1, 1A, 1B: Motor; 4, 4A, 4B: Stator; 43: Coil; 5, 5A, 5B: Busbar; 51, 51A: First busbar; 52, 52A, 52B: Second busbar; 21L, 22L, 23L: Lower section; 21H, 22H, 23H: Higher section; 51H: First hole (hole); 6, 6A: Terminal; 61: First terminal; 62: Second terminal; 602: Connecting part (partial); 7: Insulator; 100: Electronic equipment; 101: Housing; 102, 103: Gear; A: Axial.

Claims

1. An electric motor, comprising: Stator, equipped with terminals; and The busbar, located on the stator, has a hole. The side of the hole in the busbar is connected to a portion of the terminal.

2. The motor according to claim 1, The hole in the busbar is open in the axial direction. A portion of the terminal extends axially.

3. The motor according to claim 1 or 2, The busbar is supported on the stator via the terminal.

4. The motor according to claim 1 or 2, The terminal is designated as the first terminal, and the busbar is designated as the first busbar. The motor includes a second busbar, which is disposed on the stator having a second terminal. A portion of the second terminal is electrically connected to the hole in the second busbar.

5. The motor according to claim 4, The stator has coils. The second busbar is electrically connected to the coil.

6. The motor according to claim 5, It has multiple second busbars, including the second busbar. The plurality of second busbars includes two second busbars that are axially overlapping. Each of the two second busbars has a lower portion and a higher portion in the axial direction. In the axial direction, the lower portion of one of the two second busbars overlaps with the higher portion of the other second busbar.

7. The motor according to claim 4 or 5, An insulator is disposed between the first busbar and the second busbar in the axial direction.

8. An electronic device comprising a motor as described in claim 6 and a housing for housing the motor.

9. An electronic device comprising a motor as described in claim 6 and one or more gears.

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