STATOR, ELECTRIC LATHE AND STATOR PRODUCTION PROCESS

Abstract

This stator comprises: a stator core having a yoke extending in a circumferential direction and several teeth spaced circumferentially on the inner circumferential side of the yoke; a stator coil positioned between two adjacent teeth; an insulating plate positioned between two adjacent teeth and inserted between the stator core and the stator coil; and an insulating element positioned between two adjacent teeth and arranged radially inside the stator coil. The insulating plate includes a first inserted portion positioned between the insulating element and one of the two adjacent teeth, and a second inserted portion positioned between the insulating element and the other of the two adjacent teeth.

Description

Technical field

[0001] The present disclosure relates to a stator, an electric lathe and a stator manufacturing process. State of the art

[0002] In a stator that configures an electric rotary machine, such as an electric motor or a generator, it was conventionally necessary to ensure insulating properties between a stator core and a stator coil. For example, in a stator disclosed in PTL 1, an insulating paper sheet is arranged on an inner circumferential side of the stator (see Fig. 47 of PTL 1). List of citations from patent literature

[0003] [PTL 1] Japanese Patent No. 5011152 Summary of the invention: Technical problem

[0004] As the voltage in the stator coil increases, so does the risk of conduction between a stator core and the stator coil.

[0005] One objective of the present disclosure is to provide a stator, an electric lathe, and a stator manufacturing process in which insulating properties are improved. Solution to the problem

[0006] A stator according to at least one embodiment of the present disclosure comprises: a stator core comprising a yoke extending in a circumferential direction and several teeth arranged at intervals in the circumferential direction on an inner circumferential side of the yoke; a stator coil that is positioned between two adjacent teeth; an insulating plate positioned between the two adjacent teeth and inserted between the stator core and the stator coil; and an insulating element that is positioned between the two adjacent teeth and is arranged in a radial direction within the stator coil, the insulating panel contains: a first inserted section that is inserted between one of the two adjacent teeth and the insulating element, and a second inserted section that is inserted between the other of the two adjacent teeth and the insulating element.

[0007] An electric lathe according to one embodiment of the present disclosure comprises: the stator; a rotating shaft provided within the stator in the radial direction; and a rotor which is provided in the rotating shaft and faces the stator in the radial direction.

[0008] A stator manufacturing process according to an embodiment of the present disclosure comprises: an insulating plate arrangement step of arranging an insulating plate in a slot space, which is a space between two adjacent teeth contained in a stator core; a stator coil assembly step of arranging a stator coil in the teeth after performing the insulating plate assembly step; and an insulating element insertion step of inserting an insulating element into the slot space after performing the stator coil arrangement step. Advantageous effects of the invention

[0009] According to the present disclosure, a stator, an electric lathe and a stator production method are provided in which insulating properties are improved. Brief description of the drawings Fig. Figure 1 is a schematic sectional view of an electric compressor device according to one embodiment. Fig. Figure 2 is a schematic cross-sectional view of a stator according to one embodiment. Fig. Figure 3A is a schematic cross-sectional view of a stator according to one embodiment (first example). Fig. Figure 3B is a schematic cross-sectional view of a stator according to one embodiment (second example). Fig. Figure 3C is a schematic cross-sectional view of a stator according to one embodiment (third example). Fig. Figure 4 is a schematic diagram of an insulating element according to one embodiment. Fig. Figure 5 is a flowchart illustrating a stator production process according to one embodiment. Fig. Figure 6 is a schematic diagram illustrating a production process of the stator according to one embodiment. Fig. 7 is a schematic diagram showing the production process of the stator, which Fig. 6 follows, represents. Fig. Figure 8 is a schematic diagram illustrating the production process of the stator, which Fig. 7 follows, represents. Fig. 9 is a schematic diagram showing the production process of the stator, which Fig. 8 follows, represents. Fig. Figure 10 is a schematic cross-sectional view along line AA of Fig. 9. Fig. Figure 11 is a schematic cross-sectional view representing an electric lathe according to a modification example. Description of embodiments

[0010] Some embodiments of the present disclosure are described below with reference to the accompanying drawings. Dimensions, materials, shapes, relative arrangements, and the like of components described as embodiments or illustrated in the drawings are not intended to limit the scope of protection of the present disclosure, but are merely illustrative examples.

[0011] For example, an expression representing a relative or absolute arrangement, such as "in a certain direction", "along a certain direction", "parallel", "perpendicular", "center", "concentric" or "coaxial", does not strictly represent only such an arrangement, but also a tolerance or a state shifted relative by an angle or distance, provided that the same function can be maintained.

[0012] For example, expressions such as "identical", "equal" and "homogeneous", which indicate that things are in the same state, do not strictly represent only the same state, but also a tolerance or a state in which there is a difference as long as the same function can be maintained.

[0013] For example, an expression representing a shape, such as a square shape or a cylindrical shape, does not only represent a shape, such as a square shape or a cylindrical shape, in a strictly geometric sense, but also represents a shape including a non-uniform section, a chamfered section and the like within a range in which the same effect can be obtained.

[0014] However, expressions such as "provided with", "contain" or "exhibit" a component are not exclusive expressions that exclude the existence of other components.

[0015] The same configurations are designated by the same reference symbols, and their description can be omitted. <Gesamtkonfiguration von elektrischer Kompressorvorrichtung 10>

[0016] An electric compressor device 10, in which an electric lathe 1, which contains a rotating shaft 9, is integrated, is described. Fig. Figure 1 is a schematic cross-sectional view of the electric compressor device 10 according to an embodiment of the present disclosure. The electric compressor device 10 of the present example is a two-stage compression electric compressor and is configured to supply compressed air to a fuel cell mounted on a vehicle.

[0017] In the following description, a direction in which an axis of the rotating shaft 9 extends is referred to as an "axial direction," and a circumferential direction and a radial direction with respect to the axis can simply be referred to as a "circumferential direction" and a "radial direction," respectively. An outside in the radial direction is a side in a direction away from the axis of the rotating shaft 9, and an inside in the radial direction is a side in a direction close to the axis.

[0018] The electric lathe 1, which is a component of the electric compressor device 10, comprises the rotating shaft 9, a rotor 6 attached to the rotating shaft 9, a stator 5 facing the rotor 6 in the radial direction, and a housing 25 supporting the stator 5. The rotor 6 has a rotor core attached to a substantially central section of the rotating shaft 9 and several permanent magnets supported by the rotor core. The stator 5 comprises a stator core 52 and a stator coil 59 provided within the stator core 52 (details of the stator 5 are described later). The rotor 6 and the stator 5 are enclosed in the housing 25.

[0019] The electric compressor device 10 further comprises a low-pressure compressor 3 and a high-pressure compressor 4. The low-pressure compressor 3 includes a low-pressure impeller 13, which is provided on one end section of the rotating shaft 9, and a low-pressure housing 23, which accommodates the low-pressure impeller 13. The high-pressure compressor 4 includes a high-pressure impeller 14, which is provided on the other end section of the rotating shaft 9, and a high-pressure housing 24, which accommodates the high-pressure impeller 14. The low-pressure housing 23 and the high-pressure housing 24 are arranged such that they clamp the housing 25 of the electric lathe 1 in the axial direction.

[0020] The low-pressure housing 23 comprises an inlet port 236, a diffuser 237, a screw section 238, and a discharge port (not shown). Similarly, the high-pressure housing 24 comprises an inlet port 246, a diffuser 247, a screw section 248, and a discharge port (not shown). The discharge port of the low-pressure housing 23 is connected to the inlet port 246 of the high-pressure housing 24 via a connecting pipe (not shown).

[0021] The in Fig. The electric lathe 1 shown in Figure 1 is configured to function as an electric motor. An operating summary of the electric compressor device 10 is as follows. A rotating magnetic field is generated by the current flowing through the stator coil 59, causing the rotor 6 to rotate along with the rotating shaft 9. Consequently, the low-pressure impeller 13 and the high-pressure impeller 14 also begin to rotate. In the low-pressure compressor 3, air is drawn in from the inlet port 236 (arrow A1). The drawn-in air is accelerated by the centrifugal force of the low-pressure impeller 13, and the accelerated air is decelerated and pressurized by the diffuser 237 before flowing through the screw section 238 and being discharged from the outlet port (arrow A2). The low-pressure air compressed by the low-pressure compressor 3 is conveyed via a connecting pipe (arrow A3) to the inlet connection 246.In the high-pressure compressor 4, the low-pressure air that has passed through the inlet port 246 is accelerated by the centrifugal force of the high-pressure impeller 14. After the accelerated air has been slowed down and pressurized by the diffuser 247, it flows through the screw section 248 and is discharged from the outlet port (arrow A4). <Grundkonfiguration von Stator 5>

[0022] Fig. Figure 2 is a schematic cross-sectional view of the stator 5 according to an embodiment of the present disclosure. The stator core 52 includes a yoke 51 extending in the circumferential direction and several teeth 55 arranged on the inner circumferential side of the yoke 51. The several teeth 55 are arranged at equal intervals in the circumferential direction and are integrally configured with the yoke 51. The stator coil 59 is arranged between two teeth 55 that are adjacent to each other in the circumferential direction. In the present example, the stator coil 59 is arranged between any two adjacent teeth 55, below the several teeth 55. A winding method for the stator coil 59 can be either a distributed winding or a concentrated winding, but the distributed winding is in Fig. 2 shown (the same applies to Fig. 3A to 3C and the like).

[0023] The stator 5 further includes an insulating plate 60, which is arranged between two teeth 55 that are adjacent to each other in the circumferential direction. The insulating plate 60 is located within the inner circumferential surface of the yoke 51 in the radial direction and is inserted between the teeth 55 and the stator coil 59. In the present example, the insulating plate 60 is arranged between two adjacent teeth 55 beneath the multiple teeth 55. To make the drawings easier to understand, the insulating plate 60 is shown in Fig. 2 not hatched. In the following, one of two adjacent teeth 55 can be referred to as "one tooth 551", and the other can be referred to as "the other tooth 552".

[0024] The insulating plate 60 includes an facing section 66, which faces the inner circumferential surface of the yoke 51. The facing section 66 is axially oriented towards the inner circumferential surface of the yoke 51 along the entire length of the stator core 52. The facing section 66 is in direct contact with the inner circumferential surface of the yoke 51. Furthermore, the insulating plate 60 includes a first extension section 67 and a second extension section 68. The first extension section 67 and the second extension section 68 extend from both end sections of the facing section 66 in the circumferential direction towards the inner surface in the radial direction. The first extension section 67 is inserted between the stator coil 59 and one tooth 551. The second extension section 68 is inserted between the stator coil 59 and the other tooth 552.The first extension section 67 and the second extension section 68 are each in direct contact with one tooth 551 and the other tooth 552.

[0025] The stator 5 further includes an insulating element 80 extending in the axial direction. The insulating element 80 is arranged between the two teeth 55 that are adjacent to each other in the circumferential direction and is arranged radially inside the stator coil 59. The insulating element 80 is, for example, made of a resin material. In this example, the insulating element 80 is arranged between two adjacent teeth 55 beneath the multiple teeth 55.

[0026] The insulating element 80 is in contact with one tooth 551 and the other tooth 552 via the first extension section 67 and the second extension section 68 of the insulating plate 60. Sections of the first extension section 67 and the second extension section 68 located within the radial outer end section of the insulating element 80 can be referred to below as a "first inserted section 61" and a "second inserted section 62". The first inserted section 61 is inserted between one tooth 551 and the insulating element 80, and the second inserted section 62 is inserted between the other tooth 552 and the insulating element 80.

[0027] According to the configuration described above, the stator coil 59, compared to a case where the insulating element 80 is not located between the two adjacent teeth 55, can be arranged on the outside in the radial direction, and the insulating plates 60 are arranged on both sides of the insulating element 80 in the circumferential direction. Consequently, the creepage distance from the stator core 52 to the stator coil 59 increases, and thus the stator 5 is realized with improved insulating properties.

[0028] For example, in the embodiment where the electric compressor device 10, into which the electric lathe 1 is integrated, is a two-stage compression electric compressor, the voltage in the stator coil 59 tends to be high, and the risk of the stator core 52 and the stator coil 59 being electrically connected tends to increase. In this respect, it is possible, according to the configuration described above, to improve the insulating properties of the stator 5 of the two-stage compression electric compressor.

[0029] Furthermore, when a magnetic flux (not shown) passing between two adjacent teeth 55 passes through the stator coil 59, an eddy current is generated in the stator coil 59. The magnetic flux tends to be particularly strong at a tip section 54 of the teeth 55. This is because the distance between the two adjacent teeth 55 decreases towards the inside in the radial direction. In this respect, according to the configuration described above, the stator coil 59 is arranged on the outside in the radial direction. Therefore, it is possible to suppress the generation of eddy currents in the stator coil 59, and it is also possible to reduce the eddy current loss of the stator 5.

[0030] Although this is not an essential component of the present disclosure, the information contained therein may be Fig. The insulating plate 60 shown in Figure 2 further includes an extension section 70. The extension section 70 is connected to at least one of the first inserted section 61 and the second inserted section 62 and extends along the circumferential direction within the insulating element 80 in the radial direction. The Fig. The extension section 70 shown in Figure 2 has a first extension section 71, which is radially connected to the inner end section of the first inserted section 61 and extends along the circumferential direction, and a second extension section 72, which is radially connected to the inner end section of the second inserted section 62 and extends along the circumferential direction. The first extension section 71 extends towards the second extension section 68, and the second extension section 72 extends towards the first extension section 67.

[0031] According to the configuration described above, the extension section 70 is provided so that the creepage distance from the stator core 52 to the stator coil 59 is further increased, and the insulating properties of the stator 5 are further improved. The extension section 70 can contain only the first extension section 71 or only the second extension section 72 of the first extension section 71 or of the second extension section 72. Even in this case, the same technical advantages can be obtained.

[0032] Furthermore, in some embodiments where the extension section 70 has the first extension section 71 and the second extension section 72, the first extension section 71 and the second extension section 72 may face each other in the radial direction (see Fig. 3A, which will be described later). According to the configuration described above, the first extension section 71 and the second extension section 72 can be made so long that the first extension section 71 and the second extension section 72 face each other radially. The creepage distance from the stator core 52 to the stator coil 59 is further increased, thus further improving the insulating properties of the stator 5. In Fig. 3A, which will be described later, corresponds to the creepage distance from the stator core 52 to the stator coil 59 to the total value of dimensions L1, L2 and L3.

[0033] As in Fig. As shown in Figure 2, each of the tip sections 54 of the multiple teeth 55 has an inner circumferential surface 56 facing the inside in the radial direction. The inner circumferential surface 56 is a curved surface extending in the circumferential direction. Although not an essential component of the present disclosure, a radial length (dimension Li) of the insulating element 80 is 5% or more of a radius of curvature (dimension R) of the inner circumferential surface 56. As a more detailed example, dimension Li is 5% or more and 10% or less of dimension R.

[0034] According to the configuration described above, the stator coil 59 can be arranged radially on the outside by increasing the radial length of the insulating element 80. Accordingly, the creepage distance from the stator core 52 to the stator coil 59 is further increased, thus further improving the insulating properties of the stator 5.

[0035] Although this is not an essential component of the present disclosure, the stator 5, as in Fig. 2 shown, further comprising a filling section 90. The filling section 90 is a thermoplastic resin element that fills a slot space S, which is a space between the two adjacent teeth 55, in the axial direction. The slot space S is a space defined by an end face of one tooth 551, an end face of the other tooth 552, and an inner circumferential face of the yoke 51. The stator coil 59 is also arranged to be buried in the filling section 90. In particular, the stator coil 59 further comprises several wire materials extending in a substantially linear form in the axial direction along the teeth 55, and at least a portion of the several wire materials is covered by the filling section 90 (a detailed representation is shown in Fig. 2 (omitted as a schematic diagram). <Isolierelement 80>

[0036] Fig. Figures 3A to 3C are schematic cross-sectional views of stators 5A to 5C (5). In the same drawings, maximum width dimensions of insulating elements 80A to 80C (80) are represented by dimensions Ma to Mc for stators 5A to 5C (5). Here, if straight lines passing through the centroids Ga to Gc of the insulating elements 80A to 80C, while perpendicular to the radial direction, are defined in the cross-section of stator 5 as virtual straight lines La to Lc perpendicular to the axial direction, the width dimension of the insulating elements 80A to 80C (80) is the length of the insulating elements 80 in the extension direction of the virtual straight lines La to Lc. The width dimension of the insulating element 80 is defined by both ends of the insulating element 80 in the circumferential direction. Furthermore, in Fig. 3A to 3C a shortest tooth spacing, which is the shortest distance between two adjacent teeth 55, specified by dimension J.

[0037] As in Fig. As shown in figures 3A to 3C, the maximum value (dimensions Ma to Mc) of the width dimensions of the insulating elements 80A to 80C (80) is greater than the shortest tooth spacing (dimension J). According to the configuration described above, it is less likely that the insulating element 80 will pass between the two adjacent teeth 55. Therefore, it is possible to prevent the insulating element 80 from falling off the stator core 52.

[0038] As in Fig. 3A and Fig. As shown in Figure 3B, the insulating elements 80A and 80B (80) have a shape in which the width decreases towards the inside in the radial direction. The minimum width of insulating element 80A is specified by dimension Sa. The width of insulating element 80B is specified by dimension Sb.

[0039] As in Fig. As shown in 3A to 3C, the insulating elements 80A to 80C (80) include at least one of the hole section 83 and the recessed section 85, which is separated by an end section 81 (see Fig. 4) to the other end section 82 (see Fig. 4) is formed in the axial direction. The insulating element 80A contains both the hole section 83A (83) and the recessed section 85A (85). The insulating element 80B contains the hole section 83B (83), but does not contain the recessed section 85. The insulating element 80C contains the recessed section 85C (85), but does not contain the hole section 83.

[0040] The hole sections 83A and 83B (83) penetrate the central sections of the insulating elements 80A and 80B (80) when viewed in the axial direction. The in Fig. 3A and Fig. The hole section 83 shown in Figure 3B has a circular shape when viewed in the axial direction. However, the hole section 83 according to another example may have a rectangular shape or the like. Furthermore, the recessed sections 85A and 85C (85) are recesses formed on the outer surfaces of the insulating elements 80A and 80C (80). The recessed section 85A of Fig. 3A is formed on one end face and the other end face of the insulating element 80A in the circumferential direction, and the recessed section 85C of Fig. 3C is formed on an inner surface of the insulating element 80C in the radial direction. A technical advantage obtained by providing at least one of the hole section 83 and the recessed section 85 in the insulating element 80 will be described later.

[0041] Fig. Figure 4 is a schematic diagram of the insulating element 80 according to an embodiment of the present disclosure. As shown in the drawing, the insulating element 80, according to some embodiments, has a shape in which the width decreases from one side to the other in the axial direction. In the example shown in the drawing, the width of the insulating element 80 decreases continuously from one end section 81 to the other end section 82 of the insulating element 80. A technical advantage obtained by using such a configuration will be described later. In the example shown in the drawing, the width of the insulating element 80 decreases continuously from one end section 81 to the other end section 82. Fig. The insulating element 80 shown in section 4 may or may not have at least one of the hole section 83 and the recessed section 85 described above. <Produktionsverfahren von Stator 5>

[0042] A production process for stator 5 is described with reference to Fig. 5 to 10 described. Fig. Figure 5 is a flowchart illustrating a production process of the stator 5A (5) according to an embodiment of the present disclosure. Fig. Figures 6 to 9 are schematic diagrams that represent a production process of the stator 5A (5). Fig. Figure 10 is a cross-sectional view along line AA of Fig. 9. In Fig. In Figure 10, the insulating plate 60 is not shown. In the following, a "step" can be abbreviated as "S". Furthermore, it is assumed that the stator 5A is held in a position where the axial direction coincides with the vertical direction.

[0043] First, an insulating plate arrangement step (S11) is carried out, in which the insulating plate 60 is arranged in the slot space S between the two adjacent teeth 55 that form the stator core 52. Furthermore, in particular, as shown in Fig. 6 and Fig. As shown in Figure 7, the insulating plate 60 is arranged such that it faces the inner circumferential surface of the yoke 51, the end face of one tooth 551 in the circumferential direction, and the end face of the other tooth 552 in the circumferential direction. In the present example, the insulating plate 60 is arranged in each of the several slot spaces S. Furthermore, after the insulating plate 60 has been arranged, a plate device (not shown) can be used so that the sections of the insulating plate 60 corresponding to the first extension section 71 and the second extension section 72 maintain an inside-to-outside extension position in the radial direction (see Figure 7). Fig. 7).

[0044] Next, a stator coil arrangement step (S13) is performed, involving the arrangement of the stator coil 59 on the teeth 55. In the present example, as shown in Fig. As shown in Figure 8, the stator coil 59 is arranged between the two teeth 55, which are adjacent to each other in the circumferential direction. As a more specific example, the stator coil 59 can be arranged between the two teeth 55 in a pre-wound state. In this case, it is less likely that the stator coil 59, moving radially from the inside to the outside, will come into contact with the first extension section 71 and the second extension section 72, which are held in the position described above by the plate device. Therefore, the arrangement of the stator coils 59 can be carried out easily. After the stator coil 59 is arranged, the plate device is removed. In this way, the first extension section 71 and the second extension section 72 return to the position in which they extend in the circumferential direction (see Figure 8). Fig. 8).

[0045] Next, the insulating element insertion step (S15) is performed, which involves inserting the insulating element 80A (80) into the slot space S. In the present example, the insulating element 80 is inserted along the axial direction (arrow Q in Fig. 4) pushed so that the in Fig. 4. Another end section 82 of the insulating element 80 shown enters the slot space S before the other end section 81, and the insulating element 80 is inserted into the slot space S (see Fig. 9).

[0046] Next, a forming fixture arrangement step (S17) is performed, involving the arrangement of a forming fixture 110 in the stator core 52. The forming fixture 110 comprises an inner fixture 111, which is arranged within the multiple teeth 55, an outer fixture 112, which covers the outer circumferential surface of the yoke 51, and a connecting section 113 (see Fig. 10), which connects an end section of each of the inner device 111 and the outer device 112 in the axial direction. At S17 of the present example, a tube 119 (see Fig. 10), which extends in the axial direction, is further inserted into each of the hole sections 83A of the several insulating elements 80A. The tube 119 serves to maintain the position of the insulating element 80.

[0047] Next, a resin filling step (S19) is performed, involving the flow of liquid resin into the slot space S. In this example, the liquid resin is poured into the slot space S from above (arrow N in Fig. 10) The position where the resin is poured is one that the insulating element 80 avoids when viewed in the axial direction. The gas, such as air, present in the slotted space S passes through the interior of the tube 119 from bottom to top during the resin pouring process and is released from the slotted space S. At the same time, there is also a gas that passes through the interior of the recessed section 85A from bottom to top and is released from the slotted space S. It can be understood that the interior of the tube 119 is contained within the interior of the holed section 83A.

[0048] The following step (S21) involves curing the liquid resin element that fills the slot space S. During S21, a heating treatment can be performed in which the resin is heated via the molding device 110. At the point when the resin curing begins, the tube 119 is removed from the insulating element 80, and the resin is then fully cured to form the filling section 90 (see Figure 1). Fig. 3A).

[0049] Next, a mold removal step (S23) is performed, involving the removal of the mold 110, and the production process of the stator 5A ends. Steps S11 to S23 above can be performed by a person or by a device operated by a person.

[0050] According to the configuration in which the insulating element 80 has a shape in which the width dimension decreases from one side to the other in the axial direction, when the insulating element insertion step (S15) is performed, the work of inserting the insulating element 80 into the slot space S can be easily carried out.

[0051] According to the configuration in which the insulating element 80A (80) contains the hole section 83 and the recessed section 85, when the resin filling step (S19) is performed, a gas, such as air, passes through the slot space S, the interior of the hole section 83 or the recessed section 85, and is released to the outside. Consequently, the liquid resin element can be poured easily. Even in a case where the insulating element 80 contains only one of the hole section 83 and the recessed section 85, the technical advantages described above can be obtained. <modifikationsbeispiele>

[0052] The “electric lathe” of the present disclosure is not limited to an electric motor and can be a generator. Fig. Figure 11 is a schematic diagram representing an electric lathe 2 according to a modification example. The configuration of electric lathe 2 is the same as that of electric lathe 1 (see Figure 1). Fig. 1) and contains a rotating shaft 9, a rotor 6, a stator 5 and a housing 25. In the case of the Fig. In the electric lathe 2 shown in Figure 11, the rotating shaft 9 is connected to a drive motor 7 as a generator. When the rotor 6 rotates while the drive motor 7 rotates the rotating shaft 9, a current is generated in the stator coil 59, and the electric lathe 2 can generate electrical energy. At least one of the components described above, which are contained in the stator 5 of the electric lathe 1, can be applied to the stator 5 of the electric lathe 2. <zusammenfassung>

[0053] For example, the content described in some of the embodiments described above is understood as follows. 1) A stator (5) according to at least one embodiment of the present disclosure comprises: a stator core (52) comprising a yoke (51) extending in a circumferential direction and several teeth (55) arranged at intervals in the circumferential direction on an inner circumferential side of the yoke, a stator coil (59) arranged between two adjacent teeth, an insulating plate (60) arranged between the two adjacent teeth and inserted between the stator core and the stator coil, and an insulating element (80) which is arranged between the two adjacent teeth and is arranged in a radial direction within the stator coil, the insulating panel contains: a first inserted section (61) which is inserted between a tooth (551) of two adjacent teeth and the insulating element, and a second inserted section (62) which is inserted between the other tooth (552) of the two adjacent teeth and the insulating element.

[0054] According to configuration 1), the stator coil can be arranged radially on the outside, compared to a case where the insulating element is not located between the two teeth and the insulating plates are arranged circumferentially on both sides of the insulating element. Consequently, the creepage distance from the stator core to the stator coil increases, resulting in a stator with improved insulating properties. Furthermore, when the magnetic flux passing between the two teeth passes through the stator coil, an eddy current is generated within the stator coil. The magnetic flux tends to be particularly strong at the tip section (54) of the teeth. Therefore, according to configuration 1), the stator coil is arranged radially on the outside.Therefore, it is possible to suppress the generation of eddy currents in the stator coil, and it is also possible to reduce the eddy current loss of the stator.

[0055] 2) In some embodiments, the stator according to 1) contains the insulating plate further comprises an extension section (70) which extends radially along the circumferential direction from at least one of the first inserted section and the second inserted section within the insulating element.

[0056] According to the configuration in 2), the creepage distance from the stator core to the stator coil is further increased by providing the extension section. Therefore, the insulating properties of the stator are further improved.

[0057] 3) In some embodiments, the stator according to 2) contains the extension section: a first extension section (71) connected to the first inserted section and extending along the circumferential direction, and a second extension section (72) which is connected to the second inserted section and extends along the circumferential direction, and The first extension section and the second extension section face each other in the radial direction.

[0058] According to the configuration of 3), each of the first extension section and the second extension section can be extended such that the first extension section and the second extension section face each other radially. Therefore, the creepage distance from the stator core to the stator coil is further increased. Therefore, the insulating properties of the stator are further improved.

[0059] 4) In some embodiments, the stator according to 1) or 3) contains Each of the several teeth has an inner circumferential surface (56) which faces an inner side in the radial direction, and a radial length of the insulating element is 5% or more of a radius of curvature of the inner circumferential surface of the tooth.

[0060] According to the configuration in 4), the stator coil can be arranged radially by increasing the radial length of the insulating element on the outside. This further increases the creepage distance from the stator core to the stator coil, thus further improving the stator's insulating properties.

[0061] 5) In some embodiments, the stator is designed according to one of 1) to 4). in a cross-section of the stator perpendicular to an axial direction, a maximum value of a width dimension (Ma, Mb, Mc) of the insulating elements is greater than a shortest tooth spacing (J), which is a shortest distance between two adjacent teeth, and The width dimension is a length of the insulating element in an extension direction of a virtual straight line (La, Lb, Lc) that passes through a centroid (Ga, Gb, Gc) of the insulating element while being perpendicular to the radial direction.

[0062] According to the configuration of 5), it is less likely that the insulating element will pass between the two adjacent teeth. Therefore, it is possible to prevent the insulating element from falling off the stator core.

[0063] 6) In some embodiments, the stator according to 5) The insulating element has a shape in which the width decreases towards an inner side in the radial direction, and A minimum value (Sa) of the width dimension of the insulating element is greater than the shortest tooth spacing.

[0064] According to the configuration of 6), the insulating element can be arranged radially outside the inner circumferential surfaces of the two adjacent teeth. Since the stator coil can be arranged radially on the outside, the creepage distance from the stator core to the stator coil is further increased.

[0065] 7) In some embodiments, the stator according to one of 1) to 6) has The insulating element has a shape in which a width dimension (Ma, Mb, Mc) decreases from one side to the other in an axial direction, and The width dimension is a length of the insulating element in an extension direction of a virtual straight line (La, Lb, Lc) that passes through a centroid (Ga, Gb, Gc) of the insulating element while being perpendicular to the radial direction.

[0066] According to the configuration of 7), the step of inserting the insulating element into the slot space can be carried out more easily during the production process of the stator.

[0067] 8) In some embodiments, the stator according to one of 1) to 7) contains the stator further comprises a filling section (90) which is a resin element that fills a slot space (S) which is a space between the two adjacent teeth in the axial direction, and The insulating element contains at least one of a hole section (83) and a recessed section (85) formed from one end section (81) to the other end section (82) in the axial direction.

[0068] According to the configuration described in 8), when the liquid resin element is poured into the slot during the stator manufacturing process, the gas, such as air, is released from the interior of the hole section or the recessed section into the slot. Consequently, the liquid resin element can be poured smoothly.

[0069] 9) An electric lathe (1, 2) according to at least one embodiment of the present disclosure comprises: the stator (5) according to one of 1) to 8), a rotating shaft (9) which is provided in the radial direction inside the stator, and a rotor (6) which is provided on the rotating shaft and faces the stator in the radial direction.

[0070] According to the configuration of 9), the same technical advantages as those of 1) can be obtained.

[0071] 10) A stator(5) manufacturing method according to at least one embodiment of the present disclosure comprises: an insulating plate arrangement step (S11) of arranging an insulating plate in a slot space (S) which is a space between two adjacent teeth contained in a stator core, a stator coil assembly step (S13) of arranging a stator coil on the teeth after performing the insulating plate assembly step, and an insulating element insertion step (S15) of inserting an insulating element into the slot space after performing the insulating plate arrangement step.

[0072] According to the configuration of 10), the same technical advantages as those of 1) can be obtained.

[0073] 11) In some embodiments, the stator production process according to 10) The insulating element has a shape in which a width dimension (Ma, Mb, Mc) decreases from one side to the other in an axial direction, and The width dimension is a length of the insulating element in an extension direction of a virtual straight line (La, Lb, Lc) that passes through a center of mass of the insulating element while being perpendicular to the radial direction.

[0074] According to the configuration of 11), the same technical advantages as in 7) can be obtained.

[0075] 12) In some embodiments, the stator production process according to 10) or 11) includes the insulating element includes at least one of a hole section (83) and a recessed section (85) formed from one end section (81) to the other end section (82) in the axial direction, and The stator production process also includes: a resin filling step (S19) of flowing a liquid resin element into the slot space, after execution of the insulating element insertion step, and a resin curing step (S21) of the curing of the filled resin element.

[0076] According to the configuration of 12), the same technical advantages as in 8) can be obtained. Reference symbol list 1, 2 electric lathe 3 low-pressure compressors 4 high-pressure compressors 5 Stator 6 Rotor 7 Drive machine 9 Rotary shaft 10 electric compressor device 13 Low-pressure wheel 14 high-pressure wheel 23 Low-pressure housings 24 high-pressure housings 25 cases 51 yoke 52 Stator core 54 Top section 55 teeth 56 Tooth inner circumferential surface 59 Stator coil 60 Insulation board 61 first inserted section 62 second inserted section 66 facing section 67 first extension section 68 second extension section 70 Extension section 71 first extension section 72 second extension section 80 insulating element 81 a final section 82 other end section 83-hole section 85 recessed section 90 Filling section 110 Forming device 111 internal device 112 external device 113 Connecting section 119 pipe Ga to Gc focus J, Li, Ma to Mc, R, Sa Dimensions La to Lc virtual straight line S slot space QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] JP 5011152

[0003] < / zusammenfassung> < / modifikationsbeispiele>

Claims

[1] Stator, comprising: a stator core comprising a yoke extending in a circumferential direction and several teeth arranged at intervals in the circumferential direction on an inner circumferential side of the yoke; a stator coil that is positioned between two adjacent teeth; an insulating plate positioned between the two adjacent teeth and inserted between the stator core and the stator coil; and an insulating element that is positioned between the two adjacent teeth and is arranged in a radial direction within the stator coil, the insulating panel contains: a first inserted section that is inserted between one of the two adjacent teeth and the insulating element, and a second inserted section that is inserted between the other of the two adjacent teeth and the insulating element. [2] Stator according to claim 1, wherein the insulating plate further comprises an extension section which is connected to at least one of the first inserted section and the second inserted section and extends along the circumferential direction within the insulating element in the radial direction. [3] Stator according to claim 2, the extension section contains: a first extension section that is connected to the first inserted section and extends along the circumferential direction, and a second extension section, which is connected to the second inserted section and extends along the circumferential direction, and the first extension section and the second extension section are facing each other in the radial direction. [4] Stator according to any one of claims 1 to 3, wherein each of the multiple teeth has an inner circumferential surface facing an inner side in the radial direction, and a radial length of the insulating element is 5% or more of a radius of curvature of the inner circumferential surface of the tooth. [5] Stator according to any one of claims 1 to 3, wherein in a cross-section of the stator perpendicular to an axial direction a maximum value of a width dimension of the insulating element is greater than a shortest tooth spacing, which is a shortest distance between the two adjacent teeth, and The width dimension is a length of the insulating element in an extension direction of a virtual straight line that passes through a center of gravity of the insulating element while being perpendicular to the radial direction. [6] Stator according to claim 5, wherein the insulating element has a shape in which the width dimension decreases towards an inner side in the radial direction, and a minimum value of the width dimension of the insulating element is greater than the shortest tooth spacing. [7] Stator according to any one of claims 1 to 3, wherein the insulating element has a shape in which a width dimension decreases from one side to the other in an axial direction, and The width dimension is a length of the insulating element in an extension direction of a virtual straight line that passes through a center of gravity of the insulating element while being perpendicular to the radial direction. [8] Stator according to any one of claims 1 to 3, further comprising: a filling section which is a resin element that fills a slot space, which is a space between the two adjacent teeth, in an axial direction, wherein the insulating element includes at least one of a hole section and a recessed section formed from one end section to the other end section in the axial direction. [9] Electric lathe, comprising: the stator according to one of claims 1 to 3; a rotating shaft provided within the stator in the radial direction; and a rotor which is provided on the rotating shaft and faces the stator in the radial direction. [10] Stator manufacturing processes, including: an insulating plate arrangement step of arranging an insulating plate in a slot space, which is a space between two adjacent teeth contained in a stator core; a stator coil assembly step of arranging a stator coil in the teeth after performing the insulating plate assembly step; and an insulating element insertion step of inserting an insulating element into the slot space after performing the stator coil arrangement step. [11] Stator production method according to claim 10, wherein the insulating element has a shape in which a width dimension decreases from one side to the other in an axial direction, and The width dimension is a length of the insulating element in an extension direction of a virtual straight line that passes through a center of gravity of the insulating element while being perpendicular to a radial direction. [12] Stator manufacturing method according to claim 10 or 11, wherein the insulating element includes at least one of a hole section and a recessed section formed from one end section to the other end section in an axial direction, and The stator production process also includes: a resin filling step of flowing a liquid resin element into the slot space, after execution of the insulating element insertion step, and a resin curing step of the curing of the filled resin element.

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