Motor

Abstract

To simplify a wire connection circuit.SOLUTION: A motor has a plurality of coils and a plurality of terminals. In the plurality of coils, a first coil and a second coil are adjacent to each other in a circumferential direction. The plurality of terminals has a first terminal adjacent to the first coil in a radial direction and a second terminal adjacent to the second coil in the radial direction. The first coil is connected to the second terminal and the second coil is connected to the first terminal.SELECTED DRAWING: Figure 11

Description

[Technical field]

[0001] The present invention relates to a motor. [Background technology]

[0002] In stators with a large number of slots, such as 10 poles and 12 slots or 14 poles and 12 slots, a PCB (printed circuit board) or a bus bar is required to connect each segment after winding in a circle and electrically connect the windings of each segment to wiring formed on the board with conductors drawn out from the windings. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2001-103698 A [Patent Document 2] JP 2008-167590 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, since the same phases of each phase face each other in the radial direction, when electrically connecting the conductors to the wiring formed on the board, the conductors may be routed around only half the circumference of the slot. In this case, the wiring of each phase must be electrically insulated, but since the conductors of each phase cross each other, the board has a complex three-dimensional structure with three or more layers of wiring stacked on top of each other.

[0005] The present invention addresses the above-mentioned problem as an example, and has an object to provide a motor that can use a substrate having a simple configuration. [Means for solving the problem]

[0006] A motor according to one aspect of the present invention comprises: Stator and ring A substrate having a shape like a The first terminal and the second terminal A terminal. The stator has a first magnetic body and a second magnetic body adjacent to each other in the circumferential direction, a first insulator attached to the first magnetic body, a first coil wound around the first insulator, a second insulator attached to the second magnetic body, and a second coil wound around the second insulator. The annular substrate has a first hole portion and a second hole portion, a first wiring that is a bus bar electrically connected to the second coil, and a second wiring that is a bus bar electrically connected to the first coil. The above No. 1 The terminals are The second terminal is electrically connected to the first wiring and is provided on the first insulator. The second terminal is electrically connected to the second wiring and is provided on the second insulator. . In the circumferential direction, a first region in which the first wiring is arranged is different from a second region in which the second wiring is arranged. A first conductive wire drawn from the first coil is connected to the second terminal. A second conductive wire drawn from the second coil is connected to the first terminal. The first conductive wire and the second conductive wire are in a twisted position.

[0007] According to one aspect of the present invention, a substrate having a simple configuration can be used. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view showing a configuration example of a stator according to an embodiment. [Diagram 2] FIG. 2 is a plan view showing an example of the shape of a steel plate serving as a magnetic body that constitutes the connecting core. [Figure 3A] FIG. 3A is a perspective view showing an example of the shape of the connecting core. [Figure 3B] FIG. 3B is a plan view showing an example of the shape of the coupling core. [Figure 4A] FIG. 4A is a diagram (1) showing an example in which a plurality of coupled cores are formed in a ring shape. [Figure 4B] FIG. 4B is a diagram (2) showing an example in which a plurality of coupled cores are formed in a ring shape. [Diagram 5] FIG. 5 is a diagram showing an example of application of an upper insulator, a lower insulator, and a terminal to a coupled core. [Figure 6] FIG. 6 is a diagram showing an example of a coil winding. [Figure 7A] FIG. 7A is a perspective view (1) showing a configuration example of a motor. [Figure 7B] FIG. 7B is a perspective view (2) showing a configuration example of the motor. [Figure 8] FIG. 8 is a wiring diagram showing an example of connection of conductor wires and layout of wiring between terminals in another example. [Figure 9] FIG. 9 is a perspective view showing an example of a stator in which conductor wires and inter-terminal wiring are routed according to another example. [Figure 10] FIG. 10 is a wiring diagram showing an example of connection of conductor wires and layout of inter-terminal wiring according to the embodiment. [Figure 11]FIG. 11 is a perspective view showing an example of a stator in which conductor wires and inter-terminal wiring according to the embodiment are routed. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, motors according to embodiments will be described with reference to the drawings. Note that the present invention is not limited to these embodiments. Furthermore, the dimensional relationships and ratios of elements in the drawings may differ from the reality. The drawings may also include parts with different dimensional relationships and ratios. Furthermore, the contents described in one embodiment or modified example are, in principle, applicable to other embodiments or modified examples in the same manner.

[0010] (Embodiment) The motor in the embodiment is, for example, a three-phase motor having a stator 2. FIG. 1 is a perspective view showing a configuration example of the stator according to the embodiment. FIG. 1 shows a stator 21 and an annular substrate (hereinafter referred to as a connection plate) 28 provided on the stator 21. The stator 21 is formed in an annular shape by a plurality of (for example, three) connecting cores 23, in which a plurality of (for example, four) pieces 23a-1 to 23a-4 are connected via a bendable connecting portion, and an upper insulator 24 and a lower insulator 25 are attached to each piece of the connecting core 23, and a coil 26 is wound around the connecting portion. Here, the insulator is composed of the upper insulator 24 and the lower insulator 25. Each connecting core 23 serves as a segment and forms a core as the entire stator. When three connecting cores 23 are used, the number of segments is three. The number of segments is preferably three in order to increase rigidity against second and fourth order circular vibration modes, but may be an odd number equal to or greater than three. The number of pieces in the multiple connecting cores 23 may be an even number, and the number of multiple connecting cores 23 may be an odd number or a prime number. Even if the number of pieces is even, motor vibration and noise associated with the vibration can be suppressed by making the number of connecting cores 23 an odd number equal to or greater than three or a prime number. In the following description, when pieces 23a-1 to 23a-4 are not to be distinguished from one another, they are collectively referred to as piece 23a.

[0011] The connection plate 28 as a substrate electrically connects the terminals 27 provided on the upper part of the upper insulator 24 for each piece (slot) of the connected core 23 together, and is formed of a printed circuit board, a printed circuit board with wiring formed on a predetermined board, a flexible board, or the like. The connection plate 28 may be connected to the terminals 27 after the connected core 23, which is wound with the coils 26 and temporarily assembled into an annular shape, is inserted into the housing of the motor. The electrical connection of the coils 26 in each slot is performed collectively by the connection plate 28 through the terminals 27, making it unnecessary to provide a guide portion for guiding the jumper wire to the insulator, thereby shortening the dimension of the stator in the direction of the rotation axis and reducing the dead space of the motor. In the illustrated example, the end portions 27-a of the terminals 27 are inserted into the multiple holes 28a formed in the connection plate 28, and a part of the end portion 27-a of the terminals 27 protrudes outward from the surface of the connection plate 28. The end portions 27-a of the terminals 27 are electrically connected to a part of the wiring formed in the connection plate 28. The end 27-a is connected to protrusions 27-b and 27-c that are fixed to an insulator. In the example shown in FIG. 1, the terminal 27-1 is adjacent to the piece 23a-1 in the radial direction. Similarly, the terminals 27-2 to 27-4 are adjacent to the pieces 23a-2 to 23a-4 in the radial direction, respectively. In the following description, when the terminals 27-1 to 27-4 are not distinguished from each other, they are collectively referred to as the terminals 27. The terminal 27-2 is an example of a first terminal, and the terminal 27-3 is an example of a second terminal.

[0012] Fig. 2 is a plan view showing an example of the shape of a steel plate serving as a magnetic body constituting the connecting core. In Fig. 2, a steel plate 22 is formed by punching out an electromagnetic steel plate using a die or the like. A plurality of the steel plates 22 are stacked to form the connecting core 23.

[0013] FIG. 3A is a perspective view showing an example of the shape of the connecting core 23, and FIG. 3B is a plan view showing an example of the shape of the connecting core 23. In FIG. 3B, an enlarged view of both ends of the connecting core 23 is added. The connecting core 23 is formed by stacking a plurality of steel plates 22 as the magnetic body shown in FIG. 2. In FIG. 3A and the following drawings, the horizontal lines on the end faces that appear due to the stacking of the electromagnetic steel plates are omitted. In the illustrated example, four pieces 23a having a substantially T-shaped planar shape are connected via a connecting portion 23b. Teeth 23e are formed on each piece 23a. One end 23e1 of the teeth 23e (the end facing the rotor 3 in the radial direction) becomes a magnetic pole portion. The connecting portion 23b is formed thinly between a planar edge 23b-a located on the outer periphery side and a curved recess 23b-b located on the inner periphery side, and the curved recess 23b-b can be easily bent in a direction to close. In other words, a recess 23b-b is provided on the side of the connecting portion 23b. A flat contact portion 23b-c is connected to the curved recess 23b-b, and contacts the contact portion 23b-c of the adjacent piece 23a when the connecting core 23 is bent. The left and right ends of the connecting core 23 are contact portions 23c and 23d, which come into contact with the contact portions 23d and 23c of the adjacent connecting core 23 when bent into a ring shape, and are fitted together.

[0014] The surface of the contact portion 23c has a first surface 23c1 extending in a direction along the side surface 23e2 of the tooth 23e, and a second surface 23c2 inclined with respect to the first surface 23c1. In the radial direction, the first surface 23c1 is disposed on the outer side (the cylindrical portion 11 side) of the second surface 23c2. The first surface 23c1 extends in a direction perpendicular to the direction in which the pieces 23a are arranged when the pieces 23a are opened and the connecting core 23 is in a linear state. In addition, when the connecting core 23 is folded into an annular shape, each of the first surface 23c1 and the second surface 23c2 becomes a surface that extends in the radial direction from the contact portion 23c and intersects with a plane that passes through the center of the shaft (the center position of the motor). On the other hand, the contact portion 23d has a surface corresponding to the contact portion 23c of the other connecting core 23, and has a second surface 23d2 extending in a direction along the side surface 23e3 of the tooth 23e, and a first surface 23d1 inclined with respect to the second surface 23d2. The first surface 23d1 faces the first surface 23c1 of the contact portion 23c, and the second surface 23d2 faces the second surface 23c2. In the radial direction, the first surface 23d1 is disposed on the outer side (the cylindrical portion 11 side) of the second surface 23d2. The second surface 23d2 extends in a direction perpendicular to the direction in which the pieces 23a are arranged when the pieces 23a are opened and the connecting core 23 is linear. Moreover, when the connecting core 23 is bent into an annular shape, the first surface 23d1 and the second surface 23d2 become surfaces that extend radially from the contact portion 23d and intersect with a surface along the radial direction that passes through the center of the shaft (the center position of the motor). In this way, among the multiple connecting cores 23, two connecting cores 23 that contact each other have contact portions 23c and 23d, respectively, and the contact portions 23c and 23d of the two connecting cores 23 are provided with surfaces that extend radially and intersect with a surface that passes through the center of the shaft, so that the contact portions 23c mesh with each other, preventing radial displacement, and improving the roundness of the stator. Note that the contact portions 23c and 23d are not limited to the case where one of them is convex in the circumferential direction and the other is concave in the circumferential direction due to the surface structure as described above, and may be flat end surfaces. Moreover, the first surfaces 23c1 and 23d1 may extend in a direction perpendicular to the side surface 23e4 of the teeth.

[0015] 4A and 4B are diagrams showing an example of forming a plurality of connected cores 23 into an annular shape. Note that these are conceptual diagrams showing the formation of an annular core, and in reality, as described above, the upper insulator 24 and the lower insulator 25 are attached to each piece of the connected core 23, the coil is wound around the connected core 23, and then bending is performed. In Fig. 4A, three connected cores 23 are each bent into an arc shape and then combined to form an annular core as shown in Fig. 4B.

[0016] In a conventional stator in which a continuous strip-shaped core is bent into a ring shape, bending is performed in a single operation over a 360° range, which can cause excessive force to act on some connecting parts, deteriorating the circularity and causing vibration due to a radial excitation force corresponding to the number of magnetic poles of the magnet. In contrast, in this embodiment, multiple connecting cores 23 (e.g., three) are each bent into an arc shape and then combined, improving the circularity. As a result, it is expected that vibration and noise due to a radial excitation force corresponding to the number of magnetic poles of the magnet will be reduced.

[0017] In addition, in a conventional stator in which a continuous band-shaped core is bent into a ring shape, the ends are connected at one point in one revolution, so the rigidity is low against the second and fourth circular vibration modes, which can also cause vibration and noise. In contrast, in this embodiment, the number of segments is an odd number, for example, three, so the connection parts of the segments do not face each other through the center of the circle, and the rigidity is high against the second and fourth circular vibration modes. As a result, a reduction in vibration and noise can be expected.

[0018] Next, Fig. 5 is a diagram showing an example of application of an upper insulator, a lower insulator, and a terminal to a coupled core. In Fig. 5, the upper insulator 24 and the lower insulator 25 are shaped like a vertically long (long in the direction in which the steel plates are stacked) coil bobbin that can be separated into upper and lower portions near the center, and the upper insulator 24 and the lower insulator 25 are attached so as to accommodate the teeth 23e when the coupled core 23 is in an open state (unbent state). In addition, a hole 24-a for the terminal 27 is provided in the upper portion of the upper insulator 24 (the end portion on the side of the lid portion 12 described later), and the terminal 27 is inserted into the hole 24-a. Specifically, the terminal 27 is provided with two protrusions 27-b and 27-c extending toward the upper insulator 24, and these two protrusions 27-b and 27-c are inserted into the hole 24-a of the upper insulator 24, and the terminal 27 is fixed to the upper insulator 24. The terminal 27 is also provided with an end 27-a that is connected to a connection plate 28, and a hook 27n to which a conductor wire is connected.

[0019] 6 is a diagram showing an example of coil winding. In FIG. 6, for example, a conductor WR is wound clockwise (CW) around a piece 23a-1 located at the left end of the left end segment of the three connecting cores 23 to form a coil 26-1. A conductor WR is wound clockwise (CW) around a piece 23a-4 located at the right end of the connecting core 23 to form a coil 26-4. A conductor WR is wound counterclockwise (CCW) around pieces 23a-2 and 23a-3 located between two pieces 23a-1 and 23a-4 located at both ends of the connecting core 23 to form coils 26-2 and 26-3. The coil 26-2 wound around the piece 23a-2 is an example of a first coil, and the coil 26-3 wound around the piece 23a-3 is an example of a second coil. Moreover, the pieces 23a-1 to 23a-4 around which the coils 26-1 to 26-4 are wound, respectively, are an example of a plurality of cores.

[0020] The clockwise (CW) and counterclockwise (CCW) windings may be reversed, but the first coil 26-1 and the second coil 26-2 must be in the opposite directions, the second coil 26-2 and the third coil 26-3 must be in the same direction, and the third coil 26-3 and the fourth coil 26-4 must be in the opposite directions, so that the conductor wire WR is wound in a single stroke. In other words, when the connected core 23 includes four pieces 23a-1 to 23a-4, the winding direction of the coils 26-1 and 26-4 of the two pieces 23a-1 and 23a-4 located at both ends among the multiple pieces in the circumferential direction is one direction, and the winding direction of the coils 26-2 and 26-3 of the two pieces 23a-2 and 23a-3 located between the two pieces 23a-1 and 23a-4 located at both ends is the opposite direction to the one direction.

[0021] In addition, in Fig. 6, in the leftmost segment of the three connecting cores 23, the first coil 26-1 is U phase, the second coil 26-2 is U inversion phase (U bar phase), the third coil 26-3 is V inversion phase (V bar phase), and the fourth coil 26-4 is V phase, but the winding of the connecting cores 23 constituting each segment is the same, and is used as is for the other phases. For example, as shown in Fig. 6, among the three connecting cores 23, the middle segment is assigned to the W phase, W inversion phase (W bar phase), U inversion phase, and U phase, and the rightmost segment is assigned to the V phase, V inversion phase, W inversion phase, and W phase. That is, in each segment, the inversion phase of the first coil 26 is assigned to the second coil 26, and the inversion phase of the fourth coil 26 is assigned to the third coil 26. Since the three connected cores 23 shown in FIG. 6 form an annular core as shown in FIG. 4B, the first piece 23a-1 of the leftmost segment and the fourth piece 23a of the rightmost segment are adjacent to each other.

[0022] 7A and 7B are perspective views showing a configuration example of a motor 1 to which the above-mentioned stator 2 is applied, with FIG. 7A showing the exterior and FIG. 7B showing the main components. In FIG. 7A, the motor 1 includes a cylinder portion 11, lid portions 12 and 13, and a shaft 32. The cylinder portion 11 and the lid portions 12 and 13 form a housing. In FIG. 7B, the stator 2 is inserted (press-fitted) into the cylindrical cylinder portion 11, the rotor 3 is disposed in the space within the stator 2, and the shaft 32 of the rotor 3 is rotatably supported by the upper and lower lid portions 12 and 13 that hold bearings. In the longitudinal direction of the rotor 3, a surface 12a of the lid portion 12 facing the stator 2 is provided with a plurality of holes 12b, and an outer circumferential portion 12c of the lid portion 12 is provided with a plurality of holes 12d. Similarly, in the longitudinal direction of the rotor 3, a surface 13a of the cover portion 13 facing the stator 2 is provided with a plurality of holes 13b, and an outer circumferential portion 13c of the cover portion 13 is provided with a plurality of holes 13d. Fixation may be performed by inserting members such as screws into holes 12d, 13d provided in the outer circumferential portions 12c, 13c of the cover portions 12, 13 and holes 11a, 11b provided in the outer circumferential portion of the cylindrical portion 11. In the illustrated example, the rotor 3 has a rotor yoke 3a as a magnetic body provided on the shaft 32, and an annular magnet 3b provided on the outer circumferential surface of the rotor yoke 3a.

[0023] The rotor 3 may include a rotor yoke 3a formed in an annular shape by laminating electromagnetic steel sheets as magnetic members, and a shaft 32 may be provided in the center of the rotor yoke 3a, penetrating the rotor yoke 3a. For example, the rotor yoke 3a may be formed in an annular shape by bending four substantially sector-shaped pieces connected by connecting parts so as to sandwich the rod-shaped shaft 32, and the connecting parts at the ends of the connecting cores are connected by laser welding along the axial direction. The rotor yoke 3a is provided with holes that generate reluctance torque, and magnets are disposed in the holes as necessary. The terminals 27 and the connecting plate 28 of the stator 2 are not shown in the figure.

[0024] Next, the connection of the conductor wire drawn from the coil 26 and the wiring that electrically connects between the terminals (hereinafter referred to as inter-terminal wiring) will be described. FIG. 8 is a wiring diagram showing an example of the connection of the conductor wire and the wiring between the terminals in another example. As shown in FIG. 8, in another example, the conductor wire WR drawn from each coil 26 is connected to the terminal 27 that is adjacent in the radial direction to the piece 23a around which each coil 26 is drawn. Therefore, each terminal 27 is connected to the coil 26 wound around the piece 23a that is adjacent in the radial direction to each terminal 27. For example, the terminal 27-1 is connected to the coil 26-1 wound around the piece 23a-1 that is adjacent in the radial direction to the terminal 27-1. Similarly, the terminal 27-2 is connected to the coil 26-2 wound around the piece 23a-2 that is adjacent in the radial direction to the terminal 27-2.

[0025] 8, the first inter-terminal wiring C1 routed from the terminal 27 connects the terminals 27 connected to the coils 26 wound around the pieces 23a adjacent to each other in the circumferential direction. That is, the first inter-terminal wiring C1 connects the terminals 27 adjacent to each other. For example, the first inter-terminal wiring C1a connects the terminal 27-4 connected to the coil 26-4 wound around the piece 23a-4 and assigned with the V phase to the terminal 27 connected to the coil 26 wound around the other piece 23a adjacent to the piece 23a-4 in the circumferential direction to the terminal 27-4. Similarly, the first inter-terminal wiring C1b connects the terminal 27 connected to the coil 26 wound around the piece 23a and assigned with the U phase to the terminal 27 connected to the coil 26 wound around the piece 23a and assigned with the V phase to the terminal 27 wound around the piece 23a adjacent to the piece 23a in the circumferential direction to the terminal 27-4. Similarly, the first inter-terminal wiring C1c interconnects a terminal 27 connected to the coil 26 wound around the piece 23a and assigned to the W phase, and a terminal 27-1 connected to the coil 26-1 wound around the piece 23a-1 and assigned to the U phase.

[0026] Also, as shown in FIG. 8, the second inter-terminal wiring Cz routed from the terminal 27 connects the terminals 27 connected to the coils 26 assigned to the same phase to each other. In another example, the second inter-terminal wiring Cz connects the terminals 27 connected to the coils 26 assigned to the same inversion phase to each other. For example, the second inter-terminal wiring Cza connects the terminal 27-2 connected to the coil 26-2 assigned to the U inversion phase (U bar 1) to the terminal 27 connected to the coil 26 assigned to another U inversion phase (U bar 2) to each other. Similarly, the second inter-terminal wiring Czb connects the terminal 27-3 connected to the coil 26-3 assigned to the W inversion phase (W bar 1) to the terminal 27 connected to the coil 26 assigned to another W inversion phase (W bar 2) to each other. Similarly, the second inter-terminal wiring Czc connects the terminal 27-2 connected to the coil 26-2 assigned to the V inversion phase (V bar 1) to the terminal 27 connected to the coil 26 assigned to another V inversion phase (V bar 2) to each other.

[0027] FIG. 9 is a perspective view showing an example of a stator in which conductors and inter-terminal wiring are routed in another example. As described above, in the stator 2z of the other example, the conductors WR drawn from each coil 26 are connected to the terminals 27 adjacent in the radial direction to the pieces 23a around which the coils 26 are wound. That is, the terminal 27-2 is connected to the coil 26-2 to which the U-inverted phase (U bar 1) is assigned. Similarly, the terminal 27-3 is connected to the coil 26-3 to which the V-inverted phase (V bar 1) is assigned. In FIG. 9, the phase indicated by a square frame near the coil 26 indicates the phase assigned to the coil 26, and the phase indicated by a circular frame near the terminal 27 indicates the phase assigned to the coil 26 connected to the terminal 27. In the other example shown in FIG. 9, all the terminals 27-1 to 27-12 are connected to the coils 26-1 to 26-12 adjacent in the radial direction, respectively. That is, the phases assigned to the coils 26-1 to 26-12 correspond to the phases assigned to the terminals 27-1 to 27-12 radially adjacent to each of the coils 26-1 to 26-12.

[0028] 9, the first inter-terminal wiring C1a connects two terminals 27-4 and 27-6 adjacent to each other in the circumferential direction, is disposed in parallel with the second inter-terminal wiring Cza in the radial direction, and is disposed in a region different from the regions in which the other first inter-terminal wirings C1b and C1c and the second inter-terminal wirings Czb and Czc are disposed in the circumferential direction, so that it does not intersect with these inter-terminal wirings. Similarly, the first inter-terminal wiring C1b connects two terminals 27-8 and 27-9 adjacent to each other in the circumferential direction, is disposed in parallel with the second inter-terminal wiring Czb in the radial direction, and is disposed in a region different from the regions in which the other first inter-terminal wirings C1a and C1c and the second inter-terminal wirings Cza and Czc are disposed in the circumferential direction, so that it does not intersect with these inter-terminal wirings. Similarly, the first inter-terminal wiring C1c also connects two circumferentially adjacent terminals 27-12, 27-1 to each other, and is arranged in parallel with the second inter-terminal wiring Czc in the radial direction. It is arranged in a region different from the regions in which the other first inter-terminal wirings C1a, C1b and the second inter-terminal wirings Cza and Czb are arranged in the circumferential direction, and therefore does not intersect with these inter-terminal wirings.

[0029] On the other hand, in another example shown in FIG. 9, the coils 26 of the same phase as the phases assigned to the coils 26 to which the terminals 27 are connected face each other across the rotor in the radial direction. Therefore, the second inter-terminal wirings Cza to Czc that mutually connect the terminals 27 connected to the coils 26 of the same phase are necessarily laid out in a semicircular pattern. As a result, the second inter-terminal wiring Cza intersects with the second inter-terminal wiring Czb at the intersection X1. Similarly, the second inter-terminal wiring Czb intersects with the second inter-terminal wiring Czc at the intersection X2, and the second inter-terminal wiring Czc intersects with the second inter-terminal wiring Cza at the intersection X3. That is, since the phases intersect with each other, the board becomes a three-dimensional complex board in which wirings are stacked in three or more layers. In order to connect the wiring between the terminals without crossing each other, connection plate 28 requires a large space in the vertical direction. In addition, the board is thick since it has three or more layers, and large-scale equipment is required to form the board, which can be costly due to the complex process.

[0030] Next, the connection of the conductor wire drawn from the coil 26 according to the embodiment and the layout of the inter-terminal wiring will be described. FIG. 10 is a wiring diagram showing an example of the connection of the conductor wire and the layout of the inter-terminal wiring according to the embodiment. In FIG. 10, as in the other example shown in FIG. 8, the first inter-terminal wiring C1 drawn from the terminal 27 connects the terminals 27 connected to the coils 26 wound around the pieces 23a adjacent to each other in the circumferential direction. In addition, the second inter-terminal wiring C2 drawn from the terminal 27 connects the terminals 27 connected to the coils 26 assigned to the same phase to each other. In each segment including the four pieces 23a shown in FIG. 10, the conductor wire WR drawn from the first coil 26 is connected to the terminal 27 adjacent in the radial direction to the piece 23a around which the coil 26 is wound. Similarly, the conductor wire WR drawn from the fourth coil 26 in each segment is connected to the terminal 27 adjacent in the radial direction to the piece 23a around which the coil 26 is wound. For example, coil 26-1 is connected to terminal 27-1, and coil 26-4 is connected to terminal 27-4.

[0031] 10, unlike the other example shown in FIG. 8, the conductor wires drawn from the second coil 26 and the third coil 26 in each segment are connected to a terminal 27 adjacent in the radial direction to another piece 23a adjacent in the circumferential direction to the piece 23a around which the coil 26 is wound. That is, the second coil 26 and the third coil 26 in each segment shown in FIG. 10 are connected to a terminal 27 different from the terminal 27 adjacent in the radial direction to the piece 23a around which the coil is wound. For example, in the leftmost segment among the three connected cores 23 shown in FIG. 10, the conductor wire WRa drawn from the second coil 26-2 is connected to a terminal 27-3 adjacent in the radial direction to the piece 23a-3 adjacent in the circumferential direction to the piece 23a-2 around which the coil 26-2 is wound. Similarly, the conductor WRb drawn from the third coil 26-3 is connected to a terminal 27-2 adjacent in the radial direction to the piece 23a-2 adjacent in the circumferential direction to the piece 23a-3 around which the coil 26-3 is wound. That is, in the embodiment, the end of the coil 26-2 to which the U-inversion phase is assigned is set to the end position (terminal 27-3) of the coil to which the V-inversion phase is assigned in another example, and the end of the coil 26-3 to which the V-inversion phase is assigned is set to the end position (terminal 27-2) of the coil to which the V-inversion phase is assigned in another example.

[0032] In this case, as shown in Fig. 10, the second inter-terminal wiring C2a as wiring connects the terminal 27-2 located at the end of the coil 26-2 to which the U inversion phase (U bar 1) is assigned and the terminal 27-5 located at the end of the other coil 26 to which the same phase (U bar 2) is assigned. Similarly, the second inter-terminal wiring C2b as wiring connects the terminal 27-7 located at the end of the coil 26-6 to which the W inversion phase (W bar 1) is assigned and the terminal 27-10 located at the end of the other coil 26-11 to which the same phase (W bar 2) is assigned. Also, the second inter-terminal wiring C2c as wiring connects the terminal 27-11 located at the end of the coil 26-10 to which the V inversion phase (V bar 2) is assigned and the terminal 27-2 located at the end of the other coil 26-3 to which the same phase (V bar 1) is assigned. The second inter-terminal wiring C2a is an example of an inter-terminal wiring routed from a first terminal, and the first inter-terminal wirings C1a to C1c and the second inter-terminal wirings C2b, C2c are examples of other inter-terminal wirings.

[0033] FIG. 11 is a perspective view showing an example of a stator in which the conductor wire and the inter-terminal wiring according to the embodiment are routed. In FIG. 11, as in FIG. 9, the phase indicated by the rectangular frame near the coil 26 indicates the phase assigned to the coil 26, and the phase indicated by the circular frame near the terminal 27 indicates the phase assigned to the coil 26 connected to the terminal 27. As shown in FIG. 11, in the stator 2 of the embodiment, the coil 26 to which the inverted phase is assigned is connected to the terminal 27 adjacent to the terminal 27 in the circumferential direction, not to the terminal 27 adjacent to the piece 23a around which the coil 26 is wound. For example, the coil 26-2 to which the U inverted phase (U bar 1) is assigned and which is wound around the piece 23a-2 is connected to the terminal 27-3 adjacent to the piece 23a-3 in the radial direction by the conductor wire WRa. Similarly, the coil 26-3 to which the V inverted phase (V bar 1) is assigned and which is wound around the piece 23a-3 is connected to the terminal 27-2 adjacent to the piece 23a-2 in the radial direction by the conductor wire WRb. In this case, in the stator 2 according to the embodiment shown in FIG. 11, for example, the phase assigned to the terminal 27-2 is different from the phase assigned to the radially adjacent coil 26-2. The same is true for the terminals 27-3, 27-6, 27-7, 27-10, and 27-11. In the example shown in FIG. 11, the conductor WRa drawn from the second coil 26 in each segment and the conductor WRb drawn from the third coil 26 in each segment are, for example, in a twisted position with respect to each other. The conductor WRa drawn from the coil 26-2 and connected to the terminal 27-3 is an example of a first conductor, and the conductor WRb drawn from the coil 26-3 and connected to the terminal 27-2 is an example of a second conductor.

[0034] In this case, the length between the terminals 27 connected to the coils 26 to which the same phase of each inversion phase is assigned is located at a position on the circumference that is shorter than the length between the terminals 27 connected to the coils 26 to which the same phase of each inversion phase is arranged facing each other as shown in Fig. 9. Therefore, in the stator 2 of the embodiment, the terminals 27 connected to the coils 26 of the same phase can be connected without the second inter-terminal wirings C2a to C2c crossing each other. In addition, by shortening the length between the terminals 27 connected to the coils 26 to which the same phase of each inversion phase is assigned, the total length of the second inter-terminal wirings C2a to C2c on the connection plate can be shortened compared to other examples.

[0035] The details are as follows: As shown in Fig. 11, the second inter-terminal wiring C2a connects two terminals 27-3 and 27-6 to each other, is disposed in parallel with the first inter-terminal wiring C1a in the radial direction, and is disposed in a region different from the region in which the other first inter-terminal wirings C1b, C1c and the other second inter-terminal wirings C2b and C2c are disposed in the circumferential direction, so that the second inter-terminal wiring C2a does not intersect with the first inter-terminal wirings C1a, C1b, C1c and the other second inter-terminal wirings C2b and C2c. Similarly, the second inter-terminal wiring C2b connects two terminals 27-7, 27-10 to each other, is arranged in parallel with the first inter-terminal wiring C1b in the radial direction, and is arranged in a region different from the region in which the other first inter-terminal wirings C1a, C1c and the other second inter-terminal wirings C2a, C2c are arranged in the circumferential direction, so that it does not intersect with these first inter-terminal wirings C1a, C1b, C1c and the other second inter-terminal wirings C2a, C2c. Similarly, the second inter-terminal wiring C2c connects two terminals 27-11, 27-2 to each other, is arranged in parallel with the first inter-terminal wiring C1c in the radial direction, and is arranged in a region different from the region in which the other first inter-terminal wirings C1a, C1b and the other second inter-terminal wirings C2a, C2b are arranged in the circumferential direction, so that it does not intersect with these first inter-terminal wirings C1a, C1b, C1c and the other second inter-terminal wirings C2a, C2b.

[0036] As described above, the motor 1 according to one aspect of the present invention includes a plurality of coils 26 and a plurality of terminals 27. Among the plurality of coils 26, the first coil 26-2 and the second coil 26-3 are adjacent to each other in the circumferential direction. The plurality of terminals 27 include a first terminal 27-2 adjacent to the first coil 26-2 in the radial direction and a second terminal 27-3 adjacent to the second coil 26-3 in the radial direction. The first coil 26-2 is connected to the second terminal 27-3, and the second coil 26-3 is connected to the first terminal 27-2. This can reduce the cost of manufacturing the stator and improve reliability.

[0037] Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and various modifications are possible without departing from the spirit of the present invention. For example, in the embodiment, an example in which the present invention is applied to a stator 2 including a plurality of connecting cores 23 has been described, but the present invention is not limited to this, and the present invention may be applied to a stator formed of a single connecting core. In addition, an example in which the inter-terminal wiring is mounted by a connection plate 28 provided with a printed circuit board or the like has been described, but the present invention is not limited to this, and a board such as a printed circuit board on which a thin film formed of a conductive material by a known method such as photolithography is arranged at the position of the inter-terminal wiring may be used. In addition, the present invention may be mounted in other forms such as a bus bar, if necessary.

[0038] In addition, although the configuration in which the conductors WRa and WRb are in a twisted position has been described, the embodiment is not limited to this. For example, if the conductors WRa and WRb are insulated by a coating or the like and there is no risk of short circuiting, the conductors WRa and WRb may be configured to cross each other.

[0039] Furthermore, the present invention is not limited to the above-mentioned embodiment. The present invention also includes a configuration in which the above-mentioned components are appropriately combined. Further effects and modifications can be easily derived by those skilled in the art. Therefore, the broader aspects of the present invention are not limited to the above-mentioned embodiment, and various modifications are possible. [Explanation of symbols]

[0040] 1 motor, 2 stator, 23 connecting core, 23a, 23a-1 to 23a-4 pieces, 23b connecting portion, 26, 26-1 to 26-4 coils, 27, 27-1 to 27-4 terminals, 28 connecting plate, WR, WRa, WRb conducting wires, C1a to C1c first inter-terminal wiring, C2a to C2c, Cza to Czc second inter-terminal wiring

Claims

1. A stator having a first magnetic body and a second magnetic body adjacent to each other in the circumferential direction, a first insulator attached to the first magnetic body, a first coil wound around the first insulator, a second insulator attached to the second magnetic body, and a second coil wound around the second insulator; an annular substrate having a first hole portion and a second hole portion, a first wiring which is a bus bar electrically connected to the second coil, and a second wiring which is a bus bar electrically connected to the first coil; a first terminal electrically connected to the first wiring and provided on the first insulator; a second terminal electrically connected to the second wiring and provided on the second insulator; Equipped with In a circumferential direction, a first region in which the first wiring is arranged is different from a second region in which the second wiring is arranged, a first conducting wire extending from the first coil is connected to the second terminal; a second conducting wire extending from the second coil is connected to the first terminal; The first conducting wire and the second conducting wire are in a twisted position. Motor.

2. A plurality of terminals including the first terminal, the second terminal, and a third terminal; a plurality of wirings including the first wiring, the second wiring, and a third wiring electrically connected to the third terminal; Equipped with In a radial direction, the first region in which the first wiring is arranged is arranged in parallel to a third region in which the third wiring is arranged.

2. The motor according to claim 1.

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