JP7394396B2 - Stator and motor using it - Google Patents

Description

The present invention relates to a stator, and particularly to a stator in which a conductor wire having a rectangular cross section is wound, and a motor using the stator.

In recent years, demand for motors for industrial and automotive applications has been increasing. Among these, there is a desire to improve the efficiency of motors, and it is known that improving the space factor of coils arranged in slots of the stator is effective for improving motor efficiency. By improving the space factor of the coil, it is possible to suppress loss caused by current flowing through the coil when driving the motor.

Conventionally, coils have been constructed using conductor wires with a rectangular cross section, so-called flat wires, or by providing grooves for guiding and holding the conductor on the surface of the insulator around which the conductor is wound. Techniques for improving the space factor are known (for example, see Patent Documents 1 to 5).

Japanese Patent Application Publication No. 2000-350420 Japanese Patent Application Publication No. 2007-267492 JP2017-169310A Patent No. 4271495 Patent No. 5252807

Incidentally, in order to increase the output of the motor, so-called multi-layer coils are often used, in which the coil is constructed by winding conductive wires in a sequential manner starting from the surface of an insulator.

However, when winding a conductive wire in multiple layers, for example, a bulge occurs at the part where the conductive wire in the first layer is re-wound to the conductive wire in the second layer, which tends to cause disorder in the winding of the conductive wire. In particular, when constructing a multilayer coil using rectangular wire, the first and second layer conductors are wound around the insulator with their flat surfaces in contact with each other, so the conductor may slip on the contact surface. This makes it easier for the above-mentioned winding disorder to occur.

As described above, when the winding disorder of the conductive wire occurs, the space factor of the coil decreases, making it impossible to sufficiently increase the efficiency of the motor.

The present invention has been made in view of the above, and an object of the present invention is to provide a stator and a motor using the same, which suppress winding disorder at the rewinding portion of the conductive wire and increase the space factor of the coil. be.

In order to achieve the above object, a stator according to the present invention includes an annular yoke, which is disposed at a predetermined interval in the circumferential direction of the yoke, and which extends from the inner circumference of the yoke in the radial direction of the yoke. A stator comprising a plurality of extending teeth, a plurality of insulators attached to each of the plurality of teeth, and a plurality of coils made of a conductive wire having a rectangular cross section and wound around each of the plurality of insulators. The insulator includes a cylindrical conductive wire winding portion around which the conductive wire is wound, and a conductive wire guide groove provided at one end of the conductive wire winding portion for guiding the conductive wire to the conductive wire winding portion. It has a first flange and a second flange provided at the other end of the conductor winding part, and the conductor winding part has a first end surface that is continuous with the bottom surface of the conductor guide groove and a second flange provided at the other end of the conductor winding part. a first end surface and a second end surface facing each other in the axial direction of the stator; and a first side surface provided from a circumferential end of the first end surface to a circumferential end of the second end surface and facing each other in the circumferential direction. and a second side surface and a plurality of coils provided at least at a corner of the conductive wire winding portion, for winding the conductive wire around the first end surface so as to form a predetermined angle with respect to a direction perpendicular to the radial direction. The plurality of protrusions are provided at predetermined intervals from each other in the radial direction, and the protrusions are arranged on a first surface facing the first flange and on a second flange. and a second surface facing each other, and at least one of the first surface and the second surface has a convex curved surface.

According to this configuration, a conducting wire having a rectangular cross section can be stably wound in an aligned manner and in multiple layers around the insulator.

Moreover, the motor according to the present invention is characterized in that it includes at least the stator and a rotor provided at a predetermined distance from the stator.

According to this configuration, the coil space factor can be increased by winding the conducting wires around the insulator in an aligned manner and in multiple layers, thereby realizing a highly efficient motor.

According to the stator of the present invention, a conducting wire having a rectangular cross section can be stably wound in an aligned manner and in multiple layers around an insulator. Further, according to the motor of the present invention, the space factor of the coil can be increased, and a highly efficient motor can be realized.

FIG. 1 is a sectional view of a motor according to Embodiment 1 of the present invention. FIG. 2 is a schematic diagram of the insulator. FIG. 3 is a schematic diagram of the main parts of the stator. FIG. 4 is a schematic diagram of the main parts of the stator seen from the upper side in the axial direction. FIG. 5 is a sectional view taken along line VV in FIG. 3. FIG. 6 is a schematic diagram illustrating the relationship between the inclination angle of the conducting wires with respect to the radial direction and the distance between the conducting wires adjacent in the radial direction. FIG. 7 is a schematic diagram illustrating the relationship between the receding angle of the slot and the inclination angle of the conducting wire with respect to the radial direction. FIG. 8 is a diagram showing the configuration of a conducting wire winding facility. FIG. 9 is a process explanatory diagram showing the process of winding the conducting wire around the insulator. FIG. 10A is a schematic diagram showing the arrangement of the conductive wire on the conductive wire winding portion when no protrusion is provided. FIG. 10B is a schematic diagram showing the arrangement of the conductive wire on the conductive wire winding portion when protrusions are provided. FIG. 11 is a schematic diagram of another insulator. FIG. 12 is a schematic diagram of a first insulator according to a modification. FIG. 13 is a schematic diagram of a second insulator according to a modification. FIG. 14 is a schematic diagram of a third insulator according to a modification. FIG. 15 is a schematic diagram of a fourth insulator according to a modification. FIG. 16 is a schematic diagram of an insulator according to Embodiment 2 of the present invention. FIG. 17 is a schematic diagram of the main parts of the stator viewed from the lower side in the axial direction. FIG. 18A is a schematic cross-sectional view of main parts of a stator according to Embodiment 3 of the present invention. FIG. 18B is a schematic cross-sectional view of the main parts of the stator for comparison. FIG. 19A is a schematic cross-sectional view of main parts of a stator according to Embodiment 4 of the present invention. FIG. 19B is a schematic cross-sectional view of the main parts of the stator for comparison. FIG. 20 is a schematic cross-sectional view of a main part of a stator filled with a heat dissipating material.

Hereinafter, embodiments of the present invention will be described in detail based on the drawings. The following description of preferred embodiments is merely exemplary in nature and is in no way intended to limit the invention, its applications, or its uses.

(Embodiment 1)
[Motor configuration]
FIG. 1 shows a sectional view of a motor according to this embodiment. In the following description, the radial direction of the motor 1000 and the stator 100 will be referred to as the "radial direction", the outer circumferential direction will be referred to as the "circumferential direction", and the direction in which the output shaft 210 of the motor 1000 extends (direction perpendicular to the plane of paper in FIG. 1). are sometimes called the "axial direction". Furthermore, since the output shaft 210 substantially coincides with the central axis of the stator 100, the direction in which the central axis of the stator 100 extends is sometimes referred to as the "axial direction." Further, in the radial direction, the center side of the stator 100 is sometimes called the radially inner side, and the outer peripheral side is sometimes called the radially outer side.

Motor 1000 includes a stator 100 and a rotor 200. Note that the motor 1000 has components other than these, such as a motor case and a bearing that pivotally supports the output shaft 210, but for convenience of explanation, illustration and description thereof will be omitted. The motor 1000 is a so-called inner rotor type motor, but is not particularly limited thereto, and may be an outer rotor type motor.

The stator 100 includes an annular yoke 20, a plurality of teeth 10 connected to the inner periphery of the yoke 20 and provided at equal intervals along the inner periphery, and a plurality of teeth 10 attached to each of the plurality of teeth 10. It has an insulator 50 (see FIG. 2), a plurality of slots 30 configured as spaces between teeth 10 adjacent in the circumferential direction, and a plurality of coils 40 respectively housed in the plurality of slots 30. , are arranged on the radially outer side of the rotor 200 at a constant distance from the rotor 200.

In the following description, when it means a singular number, it will be called "Tooth" 10, and when it means a plurality, it will be called "Teeth" 10. In addition, if it can be used in either a singular or plural number, it will be referred to as teeth 10.

The teeth 10 are formed, for example, by laminating electromagnetic steel plates containing silicon or the like and then punching them. The yoke 20 is an annular member formed by connecting a plurality of divided yokes 21 in the circumferential direction. Like the teeth 10, the split yoke 21 is formed by stacking electromagnetic steel plates and then punching them. A tooth 10 is provided on each of the split yokes 21.

The coil 40 is a component formed by winding a conducting wire 41 (see FIG. 3) having a rectangular cross section, and the coil 40 is attached to the tooth 10 with an insulator 50 in between, and is housed in the slot 30. . The insulator 50 is a component made of an insulating material attached to the teeth 10 and the split yoke 21, and electrically isolates the coil 40 from the teeth 10 and the yoke 20. The structure of the insulator 50 will be explained in detail later. Note that in this embodiment, the coils 40 may be referred to as coils U1 to U4, V1 to V4, and W1 to W4, respectively, depending on the phase of the current flowing through the coils 40. Further, the conductive wire 41 constituting the coil 40 is wound in alignment and in multiple layers around the insulator 50 attached to the tooth 10 (see FIG. 3).

The rotor 200 has an output shaft 210 disposed at the axial center, and magnets 220 facing the stator 100 and having north and south poles alternately arranged along the outer circumferential direction of the output shaft 210. Note that the material, shape, and quality of the magnet 220 can be changed as appropriate depending on the output of the motor 1000 and the like.

The coils U1 to U4, V1 to V4, and W1 to W4 are connected in series, and the three-phase currents of the U, V, and W phases, which have a phase difference of 120 degrees in electrical angle, are connected to the coils U1 to U4, respectively. It is supplied to V1 to V4 and W1 to W4 and is excited, and a rotating magnetic field is generated in the stator 100. This rotating magnetic field and the magnetic field generated by the magnet 220 provided on the rotor 200 interact to generate torque in the rotor 200, and the output shaft 210 rotates while being supported by a bearing (not shown).

[Insulator configuration]
FIG. 2 shows a schematic diagram of the insulator according to this embodiment. Note that for convenience of explanation, the shape of the insulator 50 is illustrated in a simplified manner. Further, in FIG. 2, an enlarged view of a portion surrounded by a broken line is also shown. Further, in FIG. 2, the shape of the conducting wire 41 after being wound in one layer is shown by a dashed line.

As shown in FIG. 2, the insulator 50 includes a conductor winding part 52 around which the conductor 41 is wound, and a first flange part provided at a radially outer end of the conductor winding part 52 and having a conductor guide groove 51a. 51, and a second flange portion 53 provided at the radially inner end of the conductive wire winding portion 52.

The conducting wire 41 passes through the conducting wire guide groove 51a and is guided to the conducting wire winding portion 52. Note that the shape of the conducting wire guide groove 51a is not limited to the shape shown in FIG. 2, and may be, for example, a shape obliquely inclined with respect to the radial direction (see FIG. 4). In the latter case, the guiding angle δ (see FIG. 4) of the conducting wire 41 can be made smaller, and it is easier to suppress winding disorder of the conducting wire 41. Note that the insulator 50 is attached to the tooth 10 so that the first flange 51 covers a part of the split yoke 21.

The conductor winding portion 52 has a rectangular cylindrical shape in cross-sectional view, and has a first end surface 52a that is continuous with the bottom surface of the conductor guide groove 51a, and a second end surface 52b that faces each other in the axial direction from the first end surface 52a. ing. Furthermore, the conductive wire winding portion 52 has a first side surface 52c provided to extend in the axial direction from one end side in the circumferential direction of the first end surface 52a to one end side in the circumferential direction of the second end surface 52b; It has a second side surface 52d (see FIG. 3) extending in the axial direction from the other circumferential edge to the other circumferential edge of the second end surface 52b. The first side surface 52c and the second side surface 52d face each other in the circumferential direction.

Further, the conductive wire winding portion 52 has four corner portions 52e1 to 52e4. The four corner portions 52e1 to 52e4 include a first corner portion 52e1 located between the first end surface 52a and the first side surface 52c, and a second corner portion located between the first side surface 52c and the second end surface 52b. 52e2, a third corner portion 52e3 located between the second end surface 52b and the second side surface 52d, and a fourth corner portion 52e4 located between the second side surface 52d and the first end surface 52a.

Further, a plurality of protrusions 60 are provided on each of the four corner portions 52e1 to 52e4. The projections 60 are provided extending from each of the corner portions 52e1 to 52e4 so as to span adjacent surfaces. For example, the protrusion 60 provided on the first corner portion 52e1 is provided so as to span the first end surface 52a and the first side surface 52c, and the protrusion 60 provided on the third corner portion 52e3 is provided on the second end surface 52b and the first side surface 52c. They are provided so as to span the second side surface 52d, respectively. Furthermore, the plurality of protrusions 60 provided at each of the corner portions 52e1 to 52e4 are provided at intervals Z from each other in the radial direction.

The protrusion 60 has a first surface 60a facing the first flange 51 and a second surface 60b facing the second flange 53, whereas the first surface 60a is a flat plane. , the second surface 60b is a curved surface that is convex toward the inside in the radial direction.

[Configuration of main parts of stator]
FIG. 3 shows schematic diagrams of main parts of the stator according to the present embodiment, in which (a) is a perspective view seen from the upper side in the axial direction, and (b) is a perspective view seen from the lower side in the axial direction. are shown respectively. FIG. 4 is a schematic diagram of the main parts of the stator viewed from the upper side in the axial direction, and FIG. 5 is a cross-sectional view taken along the line VV in FIG. 3.

For convenience of explanation, in FIG. 3, the conducting wire 41 is wound halfway through the third layer in the conducting wire winding part 52, and in FIG. The figure shows the state in which the wires have been wound up. Furthermore, for convenience of explanation, in FIG. 4, when viewed from the axial direction, the conductor guide groove 51a has a shape inclined at a guide angle δ with respect to a direction orthogonal to the radial direction.

Further, in FIG. 5, illustration of the protrusion 60 is omitted. Note that the cross-sectional shape including the protrusion 60 is shown in FIG. 10B, which will be described later. Further, the arrows shown in FIG. 5 indicate the winding order of the conducting wire 41 in each layer. For example, the first-layer conductive wire 411 is wound from the first flange 51 toward the second flange 53, and the second-layer wiring 412 is wound from the second flange 53 toward the first flange 51. It is wrapped.

In the following description, when the conductor 41 is wound in n layers (n is an integer of 2 or more) in the conductor winding part 52, the (i-1)th layer (i is an integer of 2 or more, and ≦n) The portion where the conducting wire 41 is re-wound to the i-th layer conducting wire 41 may be called a cross portion 4i (cross portions 42, 43, . . . , 4i). Furthermore, in this embodiment, the conducting wire 41 is wound such that the cross portion 4i is located on the first end surface 52a. Further, the conducting wire 41 is wound in an aligned manner and in multiple layers around the conducting wire winding portion 52 of the insulator 50 .

As shown in FIG. 3(a) and FIG. 4, the first layer conductor 411 guided from the conductor guide groove 51a to the first end surface 52a has a predetermined cross angle ε with respect to the direction orthogonal to the radial direction. (See FIG. 4) is wound around the first end surface 52a. Further, the second layer conductor 412, which is re-wound from the first layer conductor 411 at the radially inner end of the conductor winding portion 52, is wound around the first end surface 52a at an angle different from the cross angle ε. Further, the third layer conductor 413, which is re-wound from the second layer conductor 412 at the radially outer end of the conductor winding portion 52, is wound around the first end surface 52a at approximately the same angle as the cross angle ε. .

On the other hand, as shown in FIG. 3B, at the second end surface 52b, the first side surface 52c, and the second side surface 52d, the first flange portion 51 of the first to third layer conducting wires 411 to 413 The conductive wire winding portion 52 is wound so as to be parallel to an end surface located on the inside in the radial direction (hereinafter referred to as the inner surface 51b of the first collar portion 51).

Further, the first layer conductive wire 411 is positioned by a plurality of protrusions 60 provided at each corner portion 52e1 to 52e4, and is held on the surface of the conductive wire winding portion 52 (see FIGS. 10A and 10B). Further, the first layer conductive wire 411 is arranged on the surface of the conductive wire winding portion 52, that is, the first end surface 52a, the second end surface 52b, the first side surface 52c, and the It is wound at an angle with respect to each of the two side surfaces 52d.

On the other hand, as shown in FIG. 5, the conductive wires 41 in the second and subsequent layers are supported by the end surfaces 41b of the conductive wires 41 in the layer immediately below and wound in an aligned manner. Similarly to the first layer conductor wire 411, the conductor wires 41 in the second and subsequent layers are also wound around the conductor wires 41 in the layer immediately below at an angle θ with respect to the radial direction. In FIG. 5, the surface of the conducting wire 41 forming an angle θ with the radial direction is referred to as a plane 41a, and the surface of the conducting wire 41 perpendicular to the plane 41a is referred to as an end surface 41b, and will be similarly referred to in the following description.

As shown in FIGS. 3 to 5, in order to wind the conducting wire 41 in the conducting wire winding portion 52 in an orderly manner and in a multi-layered manner, it is necessary to prevent the winding disorder particularly in the first layer of the conducting wire 411.

This will be explained further. The first layer of conducting wire 411 guided from the conducting wire guide groove 51a to the first end surface 52a is wound so as to be pressed against the inner surface 51b of the first flange portion 51. Therefore, as shown in FIG. 4, a curved portion that bulges inward in the radial direction is formed in the first layer of the conducting wire 411 at the end portion of the conducting wire guide groove 51a.

When the radius of curvature of the curved portion is R, as the radius of curvature R becomes smaller, the amount of deformation of the first layer conductor 411 at the terminal end portion of the conductor guide groove 51a, that is, the amount of bulge inward in the radial direction increases, It becomes easier for the winding to become disordered. Therefore, it is necessary to make the radius of curvature R as large as possible.

Therefore, the radius of curvature R can be increased by setting the winding angle of the first layer conductor 411 so that the guide angle δ and the cross angle ε shown in FIG. 4 satisfy the relationship of equation (1) below. , it is possible to suppress winding disorder of the conducting wire 41, especially the first layer conducting wire 411.

ε≦δ...(1)

FIG. 6 shows a schematic diagram illustrating the relationship between the inclination angle of the conductor wires in the radial direction and the distance between the conductor wires adjacent in the radial direction. Figures (b) and (c) each show a case where the end surfaces of radially adjacent conductive wires partially overlap each other. In addition, in the figure (c), the corner portion of the conducting wire 41 has an arcuate cross section with a predetermined radius.

Further, FIG. 7 shows a schematic diagram illustrating the relationship between the receding angle of the slot and the inclination angle of the conducting wire with respect to the radial direction. Note that for convenience of explanation, illustration of the insulator 50 is omitted in FIGS. 6 and 7. Further, in FIG. 7, an enlarged view of the portion surrounded by broken lines is also shown.

When the conducting wires 41 wound around the insulator 50 touch each other in the radial direction, the maximum value θmax of the inclination angle θ of the conducting wire 41 with respect to the radial direction is expressed by equation (2), as shown in FIG. . Note that FIGS. 6A to 6C all show the first layer conductive wire 411.

θmax=tan ^-1 (Y/X)...(2)

Here, X is the long side of the conducting wire 411 in cross-sectional view, Y is the short side of the conducting wire 411 in cross-sectional view, X corresponds to one side of the plane 41a, and Y corresponds to one side of the end surface 41b.

Moreover, at this time, the maximum value Zmax of the pitch Z of the conducting wires 411 adjacent in the radial direction is expressed by the following equation (3). Note that this pitch Z corresponds to the interval Z between the protrusions 60 shown in FIG.

Zmax=X/cos(θmax)...(3)

On the other hand, as shown in FIGS. 6(b) and 6(c), when the conductive wires 411 are in contact with each other such that their short sides overlap each other by a predetermined length, the above-mentioned inclination angle θ is determined by the following formula (4 ), and the pitch Z is expressed by equation (5).

θ=θmax×α=tan ^-1 (Y/X) (100-α) ... (4)
Z=Zmax×β=(X/cosθ)×(β/100) ...(5)

Here, the variable α is the degree of overlap (%) between the short sides of the conducting wires 41, and the variable β is the tolerance (%) of the pitch Z. The variables α and β can be changed as appropriate depending on the cross-sectional shape of the conducting wire 41, the material and condition of a surface insulating film (not shown) on the conducting wire 41, and the like. Furthermore, the variables α and β can vary within the ranges expressed by equations (6) and (7), respectively.

0<α(%)<100...(6)
β(%)>100...(7)

In addition, when the conducting wires 41 are in contact with each other so that their short sides overlap each other, in order for the conducting wire 41 to be stably held in the conducting wire winding part 52, the variable α should be about 20% or more. preferable. Similarly, the variable β is preferably about 103%.

Although FIG. 6 shows the case where the first-layer conducting wire 411 is in contact with the first-layer conducting wire 411 in the radial direction, the relationships shown in equations (2) to (7) apply in other cases, for example, when the first-layer conducting wire 411 and When the conductive wires 412 in the second layer are in contact with each other in the radial direction so that their short sides partially overlap, or when the conductive wires 412 in the second layer and the conductive wires 413 in the third layer are in contact with each other in the radial direction so that their short sides overlap Naturally, this also holds true when the two parts are in contact with each other in the radial direction so as to overlap.

In addition, the one-dot chain line in FIG. 7 shows the arrangement of the conductor 41 wound using the conventional winding procedure, in which the conductor 41 is wound around the conductor winding portion 52 without the inclination angle θ. This corresponds to the case where In this case, there is a risk that the volume of the ineffective space in the uppermost layer of the coil 40 where the conducting wire 41 is not arranged increases, or that the conducting wire 41 protrudes from the slot 30.

On the other hand, as shown in FIG. 7, by winding the conducting wire at the above-mentioned inclination angle θ with respect to the radial direction, the volume of the above-mentioned ineffective space can be reduced. Further, it is preferable that the inclination angle θ is less than or equal to the receding angle θcore of the slot 30. Here, θcore is an imaginary plane passing through the side surface of the overhanging portion 10a provided at the radially inner end of the tooth 10 and extending in the circumferential direction and the side surface of the split yoke 21, and the first This corresponds to the angle formed by the side surface 52c or the second side surface 52d. For example, if the inclination angle θ is smaller than the receding angle θcore with respect to the second side surface 52d, the uppermost layer of the conductor wire 41 among the conductor wires 41 wound in multiple layers around the insulator 50 will not protrude in the circumferential direction, and the corresponding slot 30 Since the coil 40 is housed within the coil 40, the space factor of the coil 40 can be maintained high. However, when the cross angle ε, the interval Z between the protrusions 60, etc. are also taken into account, the inclination angle θ only needs to be equal to or less than the receding angle θcore.

[How to wind the conductor wire]
FIG. 8 shows the configuration of the winding equipment for the conducting wire, and FIG. 9 shows a step explanatory diagram of the process of winding the conducting wire around the insulator. For convenience of explanation, in FIG. 8, only the main parts of the winding equipment are shown in a simplified manner. Further, the protrusion 60 provided on the insulator 50 is omitted from illustration. Further, in FIG. 9, illustration of the winding equipment is omitted.

As shown in FIG. 8, the conducting wire 41 shown in this embodiment can be wound around the insulator 50 using a normal work rotation method. That is, the tooth 10 with the insulator 50 attached is set on the holding base 2100, the conductor 41 is guided from the conductor guide groove 51a to the conductor winding part 52, and the tip of the conductor 41 is gripped by the nozzle 2200. Note that the holding base 2100 has a rotating shaft (not shown), and the rotating shaft and the radial center line of the insulator 50 are made to coincide with each other.

In this state, the conducting wire 41 is wound around the insulator 50 by rotating the holding stand 2100 around its rotation axis and moving the nozzle 2200 relative to the holding stand 2100. Note that the nozzle 2200 moves the tip of the conducting wire 41 so that the first layer conducting wire 411 is held by the protrusion 60 and wound around the first end surface 52a at a cross angle ε. Further, on the second end surface 52b and the first and second side surfaces 52c and 52d, the tips of the conductive wires 41 are moved so that the first layer of the conductive wires 411 are parallel to the inner surface 51b of the first collar portion 51. Further, from the second layer of the conductive wire 412 onward, the nozzle 2200 moves the tip of the conductive wire 41 so that it has the winding shape shown in FIG.

By winding the conducting wire 41 around the insulator 50 in this manner, the first layer conducting wire 411 is wound in an aligned manner around the conducting wire winding portion 52, as shown in FIG. 9(a). Next, at the cross portion 42, the first layer conductor 411 is re-wound to the second layer conductor 412, and the second layer conductor 412 is re-wound so as to be almost symmetrical with the first layer conductor 411 in the radial direction. It is wound around one end surface 52a (FIG. 9(b)). Further, the second layer conductor 412 is wound to the radially outer end of the conductor winding portion 52 (FIG. 9(c)), and is re-wound to the third layer conductor 413 at the cross portion 43 (FIG. 9(c)). Figure 9(d)). The third layer of conducting wire 413 is wound around the first end surface 52a at approximately the same angle as the cross angle ε.

Although not shown, in FIG. 9(c), the first layer conductor 411 is supported by a plurality of protrusions 60 provided at each corner portion 52e1 to 52e4 of the conductor winding portion 52 in the radial direction. The wire is wound at an angle with respect to the surface of the conductor winding portion 52 so as to form an inclination angle θ with respect to the surface of the conductor winding portion 52 . The second-layer conducting wire 412 is supported by the end surface 41b of the first-layer conducting wire 411, and is wound around the first-layer conducting wire 411 so as to form an inclination angle θ with respect to the radial direction. Similarly, the third layer conducting wire 413 is supported by the end surface 41b of the second layer conducting wire 412 and is wound around the second layer conducting wire 412 so as to form an inclination angle θ with respect to the radial direction. .

In this embodiment, a winding method using a nozzle is described as an example, but a winding method using a roller, hook, cam, etc. for guiding the conducting wire 41 instead of the nozzle may be adopted. In addition, as mentioned above, the workpiece rotation method is suitable for winding the conductor 41 having a non-circular cross-sectional shape, but if problems such as twisting and deformation of the conductor 41 can be solved, the workpiece fixing method can be used to wind the conductor 41. May be wrapped.

[Effects etc.]
As described above, the stator 100 according to the present embodiment includes an annular yoke 20, which is disposed at a predetermined interval in the circumferential direction of the yoke 20, and is arranged from the inner circumference of the yoke 20 in the radial direction of the yoke 20. A plurality of coils 40 are made up of a plurality of teeth 10 that extend to a plurality of teeth 10, a plurality of insulators 50 attached to each of the plurality of teeth 10, and a conducting wire 41 having a rectangular cross section, and are wound around each of the plurality of insulators 50. It is equipped with.

The insulator 50 includes a cylindrical conductor winding part 52 around which the conductor 41 is wound, and a conductor guide groove provided at a radially outer end of the conductor winding part 52 to guide the conductor 41 to the conductor winding part 52. 51a, and a second flange 53 provided at the radially inner end of the conductive wire winding portion 52.

The conductor winding portion 52 includes a first end surface 52a that is continuous with the bottom surface of the conductor guide groove 51a, a second end surface 52b that faces each other in the axial direction of the stator 100, and a circumferential edge of the first end surface 52a. It has a first side surface 52c and a second side surface 52d, which are provided from the side to the circumferential end of the second end surface 52b and are opposed to each other in the circumferential direction. Further, the conducting wire winding portion 52 is provided at the corner portions 52e1 to 52e4, and is used for winding the conducting wire 41 around the first end surface 52a so as to form a predetermined cross angle ε with respect to the direction orthogonal to the radial direction. It has a plurality of protrusions 60.

The plurality of protrusions 60 are provided at intervals Z from each other in the radial direction, and have a first surface 60 a facing the first flange 51 and a second surface 60 b facing the second flange 53 . While the first surface 60a is a flat plane, the second surface 60b is a curved surface that is convex toward the inside in the radial direction.

By configuring the stator 100 in this way, the conducting wire 41, which is a so-called flat wire having a rectangular cross section, can be stably wound in an aligned manner and in multiple layers around the insulator 50. This will be further explained using the drawings.

FIG. 10A is a schematic diagram showing the arrangement of the conducting wire on the conducting wire winding part when no protrusion is provided, and FIG. 10B is a schematic diagram showing the arrangement of the conducting wire on the conducting wire winding part when the protrusion is provided. be. Note that in FIGS. 10A and 10B, enlarged views of the portions surrounded by broken lines are also shown. Moreover, in FIGS. 10A and 10B, only the first-layer conductive wire 411 among the conductive wires 41 is shown. Furthermore, the dashed line indicates the actual position of the conducting wire 41, and the dotted line indicates the position where the conducting wire 41 should originally be wound.

As shown in FIG. 10A, in the process in which the first layer conductor 411 guided from the conductor guide groove 51a is wound around the conductor winding portion 52, the first layer conductor 411 is inserted into the radially adjacent first layer. It receives a force directed inward in the radial direction from the conductor wire 411. If the protrusion 60 is not provided on the conductor winding portion 52, there is no mechanism to support the first layer conductor 411 in the radial direction, so the first layer conductor 411 deviates from its original position and ends up in the conductor winding portion 52. rolled around. As a result, the winding is disordered, and the first-layer conducting wire 411 is no longer wound in an aligned manner around the conducting wire winding portion 52. Furthermore, if the winding disorder occurs in the first layer conductive wire 411, the second and subsequent layer conductive wires 41 that are sequentially wound thereon will also not be wound in an aligned manner, resulting in a decrease in the space factor of the coil 40. I end up.

On the other hand, as shown in FIG. 10B, according to the present embodiment, a plurality of protrusions 60 are provided at each corner portion 52e1 to 52e4 of the conductor winding portion 52 to support the first layer conductor 411 in the radial direction. can. Further, since the plurality of protrusions 60 are provided at intervals Z from each other in the radial direction, the first layer of conductive wire 411 is held on the surface of the conductive wire winding portion 52 in an aligned and wound state. Furthermore, although not shown in FIG. 10B, the second layer conductor wire 412 is supported by the end surface 41b of the first layer conductor wire 411, so that it is aligned and wound on the first layer conductor wire 411. The conducting wires 41 after the first one are similarly wound in an aligned manner around the insulator 50, and the coil 40 wound in an aligned manner and wound in multiple layers can be stably realized.

Further, as shown in FIG. 10B, the first surface 60a of the protrusion 60 is a flat plane, whereas the second surface 60b is a curved surface that is convex toward the inside in the radial direction. By configuring the protrusion 60 in this way, the end surface 41b of the first layer conductive wire 411 is stably held on the first surface 60a. Furthermore, even if the thickness of the conductive wire 41, in this case, the long side X or short side Y of the first layer conductive wire 411 in a cross-sectional view, varies from the design value and the inclination angle θ changes, the second surface 60b Since is a curved surface, the first layer conductive wire 411 can be reliably brought into contact with the second surface 60b. As a result, the first layer of conductive wire 411 is held at a predetermined position on the surface of the conductive wire winding portion 52 and wound in an aligned manner.

Moreover, by making the second surface 60b a convex curved surface, when the insulator 50 is integrally molded using a mold (not shown), it becomes easy to remove the protrusion 60 from the mold. As a result, when a special mold release agent is used to make it easier to remove the protrusion 60, or when the protrusion 60 is removed from the mold, the protrusion 60 may be chipped, resulting in defective insulators 50. It is possible to suppress an increase in manufacturing costs.

Furthermore, the first layer of conductive wire 411 wound around the conductive wire winding portion 52 is supported by the plurality of protrusions 60, so that it is wound around the first end surface 52a at a cross angle ε, and is inclined in the radial direction. The conductive wire winding portion 52 is wound obliquely on the surface of the wire winding portion 52 so as to form an angle θ.

Further, the conducting wire 41 is wound in n layers (n is an integer of 2 or more) in a conducting wire winding part 52, and the i-th layer (i is an integer of 2 or more, and i≦n) of the conducting wire 41 is connected to the first At the end face 52a, the conductive wire 41 of the (i-1)th layer is re-wound, and is wound on the conductive wire 41 of the (i-1)th layer at an angle different from the cross angle ε. The i-th layer conducting wire 41 is supported by the end surface 41b of the (i-1)th layer conducting wire 41, so that it is placed on the (i-1)th layer conducting wire so as to form an inclination angle θ with the radial direction. It is wrapped.

By winding the conducting wire 41 around the conducting wire winding portion 52 in this manner, the end face 41b of the first layer conducting wire 411 held by the plurality of protrusions 60 and wound in an aligned manner at an inclination angle θ with respect to the radial direction is supported. In other words, the second layer conductive wire 412 is wound in an aligned manner on the first layer conductive wire 411 at the cross portion 42 without winding disorderly. Similarly, using the end surface 41b of the (i-1)th layer conductive wire 41 wound in an aligned manner as a support, the i-th layer conductive wire 41 is wound at the cross portion 4i without being disordered. It is wound in alignment on top. As described above, the coil 40 wound in an array and in multiple layers around the insulator 50 can be stably realized.

The protrusion 60 provided at the corner portion 52e1 between the first end surface 52a and the first side surface 52c and the protrusion 60 provided at the corner portion 52e2 between the first side surface 52c and the second end surface 52b are respectively provided. The second surfaces 60b, which are convex curved surfaces, face in the same direction, in this case, radially inward.

By doing so, the position of the cross portion 4i can be reliably determined on the first end surface 52a.

The motor 1000 according to the present embodiment includes at least a stator 100 and a rotor 200 provided at a predetermined distance from the stator 100, and the conductive wire 41 is wound in alignment and in multiple layers around the insulator 50.

According to this embodiment, the conductive wire 41 is wound in an aligned manner and in multiple layers around the insulator 50 by the plurality of protrusions 60 provided on the conductive wire winding portion 52 . Thereby, the space factor of the coil 40 within the slot 30 can be increased, and a highly efficient motor 1000 can be realized.

Note that in this embodiment, the protrusions 60 are provided extending from each of the corner portions 52e1 to 52e4 so as to cover the adjacent surfaces, but the present invention is not limited to this. For example, as shown in FIG. 11, the protrusions 60 may be provided only at each corner portion 52e1 to 52e4. In this case as well, the first layer conductive wire 411 is wound at an angle of cross angle ε with respect to the first end surface 52a, and is supported by the first surface 60a of the protrusion 60 so that the conductive wire 411 is are wound in alignment.

<Modified example>
12 to 15 show schematic diagrams of first to fourth insulators according to this modification. In each figure, (a) is a perspective view seen from the upper side in the axial direction, and (b) is a perspective view seen from the lower side in the axial direction. In addition, in FIGS. 12 to 15, parts similar to those in Embodiment 1 are given the same reference numerals, and detailed explanations are omitted.

In the configuration shown in Embodiment 1, the protrusion 60 is provided at each corner portion 52e1 to 52e4, whereas in the configuration shown in this modification, the protrusion 60 is provided at other locations, such as the first side surface 52c and the second side surface 52d. The difference is that a protrusion 61 is also provided in the other parts.

For example, as shown in FIG. 12, a plurality of protrusions 61 are provided on the first side surface 52c and the second side surface 52d at intervals Z in the radial direction and parallel to the inner surface 51b of the first collar portion 51. It may be provided as follows. Specifically, a plurality of protrusions 61 may be provided on the first side surface 52c so as to extend linearly from the corner portion 52e1 to the corner portion 52e2. Further, a plurality of protrusions 61 may be provided on the second side surface 52d so as to extend linearly from the corner portion 52e3 to the corner portion 52e4.

Further, as shown in FIG. 13, in addition to the configuration shown in FIG. 12, a plurality of protrusions 62 are provided on the second end surface 52b with an interval Z in the radial direction and mutually with the inner surface 51b of the first flange portion 51. They may be provided in parallel. Specifically, a plurality of protrusions 62 may be provided on the second end surface 52b so as to extend linearly from the corner portion 52e2 to the corner portion 52e3. In the configuration shown in FIG. 13, the protrusion 62 is provided so as to extend continuously from the corner portion 52e1 to the corner portion 52e3.

Furthermore, as shown in FIG. 14, in addition to the configuration shown in FIG. 13, a plurality of protrusions 63 may be provided on the first end surface 52a at a distance Z from each other in the radial direction. Specifically, the protrusion 63 may be provided on the first end surface 52a so as to extend linearly from the corner portion 52e4 to the corner portion 52e1 . Furthermore, in the configuration shown in FIG. 14, the plurality of protrusions 63 provided on the first end surface 52a are inclined at a cross angle ε with respect to the direction orthogonal to the radial direction, and are spaced apart from each other by an interval Z in the radial direction. are provided respectively.

By applying the insulator 50 shown in FIGS. 12 to 14 to the stator 100, the same effects as in the first embodiment can be achieved. Further, by providing a plurality of protrusions 61 to 63 continuously extending on the surface of the conductor winding portion 52 other than the corner portions 52e1 to 52e4, the winding position of the conductor 41 can be determined reliably, and the conductor 41 can be stabilized. It can be wound in line.

Note that instead of the configuration shown in FIG. 14, as shown in FIG. It may be configured to be discontinuous.

That is, a plurality of protrusions 64 are provided on the first side surface 52c and the second side surface 52d at intervals in the radial direction and the axial direction, respectively. Further, a plurality of protrusions 64 are provided on the second end surface 52b at intervals in the radial direction and the circumferential direction. A plurality of protrusions 64 are provided on the first end surface 52a at intervals in the radial direction and the circumferential direction. Note that the radial interval between the protrusions 64 provided on each of the surfaces 52a to 52d is the above-mentioned interval Z.

Even when the insulator 50 shown in FIG. 15 is applied to the stator 100, the same effects as in the first embodiment can be achieved. Although not shown, the shape of the protrusion 64 shown in FIG. 15 may be applied to the configuration shown in FIGS. 12 and 13.

(Embodiment 2)
FIG. 16 shows a schematic diagram of the insulator according to this embodiment, and FIG. 17 shows a schematic diagram of the main parts of the stator viewed from the upper side in the axial direction. Note that FIG. 16 also shows an enlarged view of the portion surrounded by broken lines. Further, in FIG. 16, the same parts as in Embodiment 1 are given the same reference numerals, and detailed explanations are omitted. Further, in FIG. 17, only the first layer conductive wire 411 among the conductive wires 41 is illustrated.

In the configuration shown in the first embodiment, a protrusion 60 provided at a corner portion 52e1 between the first end surface 52a and the first side surface 52c, and a protrusion 60 provided at the corner portion 52e2 between the first side surface 52c and the second end surface 52b. This means that the second surfaces 60b provided on each of them face inward in the radial direction.

On the other hand, in the configuration of the present embodiment shown in FIG. 16, the protrusion 60 provided at the corner portion 52e1 between the first end surface 52a and the first side surface 52c is such that the second surface 60b faces inward in the radial direction. , the second surface 60b of the protrusion 60 provided at the corner portion 52e2 of the first side surface 52c and the second end surface 52b faces outward in the radial direction. In other words, the second surfaces 60b of the former protrusion 60 and the latter protrusion 60 face in opposite directions.

Depending on the design specifications of the motor 1000, it is also required that the cross section 4i be provided on a surface different from the first end surface 52a of the conductive wire winding section 52. However, in the configuration shown in the first embodiment, it was difficult to provide the cross portion 4i outside the first end surface 52a.

On the other hand, according to this embodiment, the cross portion 4i can be provided not only on the first end surface 52a but also on the second end surface 52b. In other words, the conductive wire 41 is also wound on the second end surface 52b from the jth layer (j is an integer, 1≦j≦n-1) to the (j+1) layer, and the cross portion 4i is also wound on the second end surface 52b. provided. This improves the degree of freedom in designing the stator 100 and, by extension, the motor 1000. In this case, for example, as shown in FIG. 17, the first layer of conducting wire 411 may be wound on the second end surface 52b so as to form a cross angle ε with respect to the direction perpendicular to the radial direction. .

(Embodiment 3)
FIG. 18A shows a schematic cross-sectional view of the main part of the stator according to this embodiment, and FIG. 18B shows a schematic cross-sectional view of the main part of the stator for comparison. Note that for convenience of explanation, illustration of the protrusion 60 is omitted in FIGS. 18A and 18B. In addition, the same parts as in the first embodiment are given the same reference numerals and detailed explanations are omitted.

In the configuration of the present embodiment shown in FIG. 18A, the kth turn of the first-layer conducting wire 411 (k is the number of turns of the first-layer conducting wire 411) is arranged at the radially inner end of the conducting wire winding portion 52. This embodiment differs from the configuration of Embodiment 1 shown in FIG. 18B in that a step 52f of a predetermined height is provided in the portion where the second embodiment is scheduled to be moved. Note that the step 52f is provided continuously on the surface of the conductive wire winding portion 52, that is, on both the first and second end faces 52a, 52b and the first and second side faces 52c, 52d . Furthermore, the first layer conductive wire 411 is not wound around the step 52f.

According to the present embodiment, it is possible to suppress energy loss of the motor 1000 due to eddy current flowing through the conducting wire 41 due to the magnetic flux passing through the inside of the coil 40. This will be explained further.

As shown in FIG. 18B, when a current flows through the conducting wire 41, a magnetic flux is generated passing through the inside of the coil 40, that is, the inside of the split yoke 21 and the teeth 10, and the magnetic flux is generated at the radially inner end of the tooth 10. A part of it may leak into the conducting wire 41. This leakage magnetic flux generates an eddy current in the conducting wire 41 on the side closer to the teeth 10, for example, the first layer conducting wire 411, causing energy loss.

On the other hand, according to the present embodiment, as shown in FIG. 18A, a predetermined portion is placed on the conductive wire 41 through which the leakage magnetic flux passes, that is, the portion corresponding to the kth turn located on the radially inner side of the first layer conductive wire 411. By providing the height difference 52f, the first layer conductive wire 411 is prevented from being wound around this portion. This prevents leakage magnetic flux from passing through the conducting wire 41, thereby suppressing the generation of eddy currents and, in turn, the energy loss of the motor 1000.

Note that the step 52f may be provided across the (k-1)th turn and the kth turn of the first-layer conducting wire 411. Furthermore, a step 52f may be provided extending to a portion where the first turn of the second-layer conducting wire 412 is to be wound. The height and radial length of the step 52f may be changed as appropriate depending on the degree of reduction in the eddy current flowing through the conductive wire 41 and the reduction in the space factor of the coil 40.

Note that since the influence of leakage magnetic flux on the side near the split yoke 21 is small, in order to suppress the generation of eddy currents, the conductor winding portion 52 should be moved so that the conductor 41 is in contact with the inner surface 51b of the first flange portion 51. It is preferable that it be in contact with.

(Embodiment 4)
FIG. 19A shows a schematic cross-sectional view of the main part of the stator according to this embodiment, and FIG. 19B shows a schematic cross-sectional view of the main part of the stator for comparison. Note that for convenience of explanation, illustration of the protrusion 60 is omitted in FIGS. 19A and 19B. In addition, the same parts as in the first embodiment are given the same reference numerals and detailed explanations are omitted.

In the configuration shown in FIG. 19B, among the insulators 50 adjacent to each other in the circumferential direction, the conductive wire 41 wound around one insulator 50 and the conductive wire 41 wound around the other insulator 50 are symmetrical in shape. Each one is wound so that

On the other hand, in the configuration of the present embodiment shown in FIG. 19A, among the insulators 50 adjacent to each other in the circumferential direction, the conducting wire 41 wound around one insulator 50 and the conducting wire 41 wound around the other insulator 50 , each of which is wound so that its shape is asymmetrical.

By forming each conducting wire 41 into the winding shape shown in FIG. 19A, the space factor of the coil 40 can be increased. This will be explained further.

Normally, when winding the conductive wires 41 around a plurality of insulators 50, in order to standardize the winding process and simplify the assembly process of the stator 100, coils 40 that are adjacent to each other in the circumferential direction are arranged to face each other. The conducting wire 41 is wound so that the planes are symmetrical.

In a set of coils 40 wound in this manner, in order to suppress interference between the coils 40 and to ensure mutual insulation distance, coils 40 adjacent to each other in the circumferential direction and these are attached. It is necessary to arrange the teeth 10 at intervals of a predetermined value or more.

However, depending on the size of the coil 40 and the number of turns of the conducting wire 41, the interval may become too large, resulting in a large ineffective space within the slot 30 that is not occupied by the conducting wire 41.

On the other hand, according to the present embodiment, the insulation distance between the coils 40 adjacent to each other in the circumferential direction is ensured by making the winding shapes of the conducting wires 41 wound around the insulators 50 adjacent to each other in the circumferential direction asymmetrical. At the same time, the above-mentioned ineffective space can be reduced and the space factor of the coil 40 can be increased.

Note that among the conductive wires 41 wound around the insulators 50 adjacent to each other in the circumferential direction, the lth turn of each conductive wire 41 (l is an integer, 1≦l≦k; k is the number of turns of the first layer of the conductive wire ) by making the winding shape asymmetrical, the degree of reduction of ineffective space can be further increased, and the degree of freedom in designing the coil 40 can be improved. For example, as shown in FIG. 18A, the third and fourth turns of the conductive wire 41 located on the left side of the paper have seven layers each, whereas the third turn of the conductor 41 located on the right side of the paper has six layers. By making the fourth winding five layers, the degree of reduction of ineffective space is increased, and the insulation distance between the two coils 40 is also ensured. However, the winding shape of the conducting wire 41 is not particularly limited to this, and may be changed as appropriate depending on the size of the coil 40, the number of layers of the conducting wire 41, the number of turns, etc.

(Other embodiments)
In the first to fourth embodiments, in the conductive wire 41 wound around the insulator 50, there are Alternatively, as shown in FIG. 20, a heat dissipating material 70 may be filled between the conductive wires 41 adjacent to each other in the radial direction to dissipate heat generated in the conductive wires 41 to the outside.

By configuring the stator 100 in this way, the temperature rise of the stator 100 is suppressed, and the efficiency of the motor 1000 can be improved.

Further, in the first embodiment, the work rotation method is used to wind the conducting wire 41 around the insulator 50, but the method of winding the coil 7 is not particularly limited.

For example, the conducting wire 41 may be wound around the insulator 50 by a so-called conducting wire rotation method in which the holding stand 2100 is fixed and the nozzle 2200 moves around the holding stand 2100. In this case, the yoke 20 does not need to be configured to connect the split yokes 21 in the circumferential direction; instead, the yoke 20 may be configured by punching an electromagnetic steel plate into an annular shape and stacking the punched electromagnetic steel plates. You can. Further, after the yoke 20 is formed into an annular shape, the plurality of teeth 10 may be connected to the inner periphery of the yoke 20, respectively.

Further, the insulator 50 may be a so-called split type insulator that is attached to the tooth 10 from above and below in the axial direction, or may be an integral structure that covers the entire outer peripheral surface of the tooth 10.

Further, in the stator 100 according to the first to fourth embodiments, the coil 40 may be composed of a single layer of conductive wire 41. Also in this case, the conducting wire 41 is wound around each of the plurality of insulators 50 in an aligned manner.

The cross-sectional shape of the conducting wire 41 may be a rectangle as shown in FIGS. 6(a) and 6(b), or may be a rectangle with chamfered four corners as shown in FIG. 6(c). Further, the cross-sectional shape of the conducting wire 41 is not particularly limited to the shape shown in FIG. 6, and for example, the side X may be longer than the side Y.

Moreover, the tooth 10 may have a different cross-sectional shape between the axial end portion and the axial center portion. For example, the cross-sectional shape of the tooth 10 changes continuously or stepwise so that the width in the direction orthogonal to the radial direction is narrower at both axial ends, or at the upper or lower end than at the center. You can. The inner circumferential surface of the conductive wire winding portion 52 of the insulator 50 may be deformed in accordance with the change in the cross-sectional shape of the tooth 10.

Since the stator of the present invention can increase the space factor of the coil, it is particularly useful when applied to motors that require high efficiency.

10 Teeth
20 Yoke 21 Split yoke 30 Slot 40 Coil 41 Conductor 4i Cross section 50 Insulator 51 First flange 51a Conductor guide groove 51b Inner surface 52 of first flange 51 Conductor winding section 52a First end surface 52b Second end surface 52c First side surface 52d Second side surface 52e1 to 52e4 Corner portion 52f step
53 Second flange 60 to 64 Protrusion 60a First surface 60b Second surface 70 Heat dissipation material 100 Stator 110 Stator core 200 Rotor 210 Output shaft 220 Magnet 411 1st layer conducting wire 412 2nd layer conducting wire 413 3rd layer conducting wire 1000 motor

Claims (12)

an annular yoke, a plurality of teeth arranged at predetermined intervals in the circumferential direction of the yoke and extending in a radial direction of the yoke from an inner periphery of the yoke, and attached to each of the plurality of teeth. A stator comprising a plurality of insulators and a plurality of coils each made of a conductive wire having a rectangular cross section and wound around each of the plurality of insulators,
The insulator is
a cylindrical conductive wire winding portion around which the conductive wire is wound;
a first flange portion having a conductor guide groove provided at one end of the conductor winding portion and guiding the conductor wire to the conductor wire winding portion;
a second flange provided at the other end of the conductive wire winding portion;
The conductor winding portion is
a first end surface that is continuous with the bottom surface of the conductor guide groove; and a second end surface that is opposite to the first end surface in the axial direction of the stator;
a first side surface and a second side surface provided from a circumferential edge of the first end surface to a circumferential edge of the second end surface and facing each other in the circumferential direction;
A plurality of protrusions are provided at least at the corners of the conductive wire winding portion and are used to wind the conductive wire around the first end surface so as to form a predetermined angle with respect to a direction perpendicular to the radial direction. death,
The plurality of protrusions are provided at predetermined intervals from each other in the radial direction,
The protrusion has a first surface facing the first flange and a second surface facing the second flange,
A stator, wherein at least one of the first surface and the second surface has a convex curved surface. The stator according to claim 1,
The projections provided at the corner portions of the first end surface and the first side surface and the projections provided at the corner portions of the first side surface and the second end surface are the projections provided at the respective corner portions. A stator characterized by curved surfaces facing in the same direction. The stator according to claim 1,
The projections provided at the corner portions of the first end surface and the first side surface and the projections provided at the corner portions of the first side surface and the second end surface are the projections provided at the respective corner portions. A stator characterized by shaped curved surfaces facing in opposite directions. The stator according to any one of claims 1 to 3,
The first layer of conductive wire wound in the conductive wire winding section is supported by the plurality of protrusions, so that it is wound at least at the first end surface at the predetermined angle, and at a predetermined angle with respect to the radial direction. A stator characterized in that the conductive wire is wound obliquely on the surface of the conductor winding portion so as to form an inclination angle of . The stator according to claim 4,
The conductive wire is wound in n layers (n is an integer of 2 or more) in the conductive wire winding part,
The i-th layer (i is an integer greater than or equal to 2, and i≦n) conductor wire is re-wound from the (i-1) layer conductor wire at the first end surface, and is the (i-1) layer conductor wire. is wound at an angle different from the predetermined angle,
The i-th layer conductive wire is supported by the end face of the (i-1) layer conductive wire, so that the (i-1) layer conductive wire forms the predetermined inclination angle with the radial direction. A stator characterized in that it is wound on top of. The stator according to claim 5,
The stator is characterized in that the conductive wire is wound from the jth layer (j is an integer, 1≦j≦n−1) to the (j+1)th layer on the second end surface. The stator according to any one of claims 4 to 6,
At the radially inner end of the conductor winding portion, a predetermined height is provided at a portion where at least the kth turn (k is the number of turns of the first layer conductor) of the first layer conductor is to be arranged. There are steps,
A stator characterized in that at least the first layer of conducting wire is not wound around the step. The stator according to any one of claims 1 to 7,
A stator characterized in that a conducting wire wound around one insulator and a conducting wire wound around another insulator adjacent to the one insulator in the circumferential direction have asymmetrical winding shapes. The stator according to claim 8,
The conducting wire wound around the one insulator and the conducting wire wound around the other insulator are the lth turn of the conducting wire (l is an integer, 1≦l≦k; k is the first layer of the conducting wire). A stator characterized in that the winding shape is asymmetrical in terms of the number of windings. The stator according to any one of claims 1 to 9,
A heat dissipating material for dissipating heat generated in the conductive wires to the outside is filled between conductive wires that are wound around one insulator and are adjacent to each other in the circumferential direction or the radial direction. stator. The stator according to any one of claims 1 to 10,
The yoke is configured by a plurality of divided yokes connected to each other in the circumferential direction,
A stator characterized in that the teeth are disposed on each of the plurality of divided yokes. A stator according to any one of claims 1 to 11,
At least a rotor provided at a predetermined distance from the stator,
A motor characterized in that the conductive wire is wound in alignment and in multiple layers around the insulator.

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