JP4219698B2 - stator - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a stator used in a rotating electric machine such as an electric motor or a generator.
[0002]
[Prior art]
Conventionally, as a stator used in a rotating electrical machine such as an electric motor or a generator, a plurality of teeth cores arranged at predetermined intervals on a predetermined circumference, and a plurality of core back cores provided between adjacent teeth cores, And a stator formed by inserting a stator winding between these teeth cores has been proposed (see Patent Document 1).
[0003]
Incidentally, it is necessary to insulate these iron cores from the stator windings in order to prevent excess current from flowing through the teeth iron core and the core back iron core. For this reason, a technique has been proposed in which an insulating sheet is provided between the teeth core or the core back core and the stator winding, and the iron core is insulated from the stator winding by the insulating sheet. As this type of technology, as shown in FIG. 13, a substantially U-shaped insulating sheet covering the side surfaces of adjacent teeth cores is arranged, and stator windings are interposed between these teeth cores with the insulating sheet interposed therebetween. After winding, it has been studied to insert a substantially flat insulating sheet together with the core back iron core so that the insulating sheet is brought into close contact with the end of the substantially U-shaped insulating sheet.
[0004]
[Patent Document 1]
JP-A-4-236149
[Problems to be solved by the invention]
However, when the inner surface of the core back core is covered with the flat insulating sheet, the insulating sheet is easily displaced in the axial direction of the stator as shown in FIG. Insulation between the inner peripheral side of the core-back iron core and the stator winding is incomplete, or in the case of a stator of a rotating electrical machine for a vehicle, it is mounted on the vehicle after the manufacture of the stator is completed Thus, it is considered that the insulation sheet is displaced in the axial direction of the stator due to the vibration of the vehicle and the insulation becomes incomplete.
In addition, the insulation member has been arranged on the axial end face of the teeth iron core or core back iron core so as to insulate the axial end face of the teeth iron core or core back iron core from the coil end of the stator winding. It is conceivable that positional displacement occurs in the process of inserting the stator winding and the process of forming the coil end, resulting in incomplete insulation.
[0006]
This invention is made | formed in view of such a situation, and it aims at providing the stator which can insulate a teeth iron core or a core back iron core, and a stator coil | winding reliably.
[0007]
[Means for Solving the Problems]
The invention described in claim 1 made to solve the above problems is provided between a plurality of teeth iron cores (for example, teeth iron core 11 in an embodiment described later) arranged adjacent to each other and adjacent teeth iron cores. A stator including a plurality of core back cores (for example, core back cores 12 in embodiments described later) arranged in an annular shape along the axial direction of the core back core arranged in the shape of a ring A pair of grooves (for example, the groove 26 in the embodiment described later) is formed on the inner peripheral surface (for example, the inner peripheral surface 12a in the embodiment described later) of the core back iron core. shaped insulating member (e.g., insulating sheet 30 and 40 in the embodiment described below) engaged with both ends of the both end portions of the insulating member, circumferential direction of the core back core disposed in the annular The curved portion or the bent portion is curved or bent outwardly of the groove (e.g., the bending portion 31 in the embodiment described below, the bent portion 41) and wherein the was a stator, characterized in that is formed To be a stator.
[0008]
According to this invention, the insulating member is inserted in a state in which the insulating member is securely positioned with respect to the core back iron core by engaging both ends of the insulating member having a substantially U-shaped cross section with the pair of grooves. Therefore, the inserted insulating member is surely interposed between the core back iron core and the stator winding, so that the axial displacement of the stator can be prevented, and the core back iron core is fixed. The child winding can be reliably insulated.
In addition, when the both ends of the insulating member are engaged with the groove, the curved portion or the bent portion is enlarged or reduced in diameter, so that the diameter of the insulating member is reduced or increased with respect to the groove. Thus, the sandwiching force can be exerted, and the insulating member can be more reliably positioned with respect to the core back iron core, whereby the core back iron core and the stator winding can be more reliably insulated.
[0009]
The invention described in claim 2 is the one described in claim 1, wherein the teeth core is provided by a plurality of nozzles (for example, a nozzle 29 in an embodiment described later) that supplies a plurality of stator windings simultaneously. A stator winding is mounted from the outer peripheral side of the core, and a core back iron core in which the insulating member is pre-engaged is inserted between the adjacent tooth cores from the outer peripheral side of the tooth core. is there.
[0010]
According to this invention, a plurality of stator windings are supplied from one nozzle, and a plurality of nozzles are simultaneously wound around the teeth iron core with a predetermined interval to wind the stator windings. The time required for mounting the stator windings can be shortened and the space factor can be improved, and the insulating member is engaged between the teeth cores around which the stator windings are wound. Since the core back core is inserted, even if the wound stator winding comes into contact with the insulating member, it can be prevented from being displaced in the axial direction of the insulating member. It can be reliably insulated.
[0024]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a stator and a method for manufacturing the stator according to an embodiment of the present invention will be described with reference to the drawings.
FIG. 11 is a perspective view showing a stator in the embodiment of the present invention. As shown in the figure, the stator 10 according to the present embodiment is formed in a substantially cylindrical shape, and a plurality of teeth cores 11 arranged in a ring at predetermined intervals on a predetermined circumference, and adjacent teeth. And an annular core back iron core 12 disposed between the iron cores 11 and 11.
[0025]
The teeth core 11 has a predetermined thickness in a direction parallel to the central axis A of the stator 10 as shown in FIG. 12 to be described later, and is disposed on the inner peripheral side around which the stator winding 13 is wound. The winding part and the yoke part of the outer periphery side in which the core back iron core 12 is inserted are comprised. Moreover, the protrusion part 17 which protrudes toward the outer side of the circumferential direction is provided in the edge part of the teeth iron core 11, and it can contact | abut to the inner peripheral side end surface of the insulating sheet 14 mentioned later for details.
The teeth iron core 11 is formed by laminating electromagnetic steel plates having directionality such as silicon steel plates, and the easy magnetization direction is set to the radial direction of the stator, for example.
[0026]
An insulating sheet 14 having a substantially U-shaped cross section is disposed between the teeth cores 11. As for this insulating sheet 14, the bottom face part contact | abutted to the protrusion part 17 of the said adjacent iron cores 11 and 11, the both side surface part contact | abutted to the coil | winding part of the said tooth iron core 11, and both the front-end | tip parts were opened. In the state, it is arrange | positioned at the said adjacent iron cores 11 and 11. FIG.
The U-shaped insulating sheet 14 is formed to have a width that is several millimeters larger than the circumferential width of the core back core 12 or the teeth core 11 to enhance the insulation. Further, the height of the insulating sheet 14 is formed to be slightly higher than the height of a stator winding 13 to be described later, and can be bent so that the front end surfaces are close to each other.
[0027]
The core back iron core 12 is formed to have a width equal to or slightly larger than the gap (slot) 25 between the adjacent tooth iron cores 11, 11 and is fixed so as to be sandwiched between the tooth iron cores 11. The The thickness of the core back core 12 is formed to be equal to the thickness of the teeth core 11, for example.
[0028]
The core back iron core 12 is formed in a substantially rectangular parallelepiped shape in which electromagnetic steel plates having directionality such as silicon steel plates are laminated, and the easy magnetization direction is set, for example, in the circumferential direction of the stator.
[0029]
FIG. 1A is a perspective view of an inner peripheral side of the core back iron core, and FIGS. 1B and 1C are a perspective view and a plan view of an insulating sheet engaged with the core back iron core.
A pair of grooves 26 are formed in the inner peripheral surface 12a of the core back iron core 12 along the axial direction (A direction) of the annular core back iron core 12, as shown in FIG. ing. Both ends (engaging portions) 18 of the insulating sheet 16 having a substantially U-shaped cross section shown in FIGS. 1B and 1C are engaged with these grooves 26. Thereby, as will be described later, the core back iron core 12 can be inserted between the teeth iron cores 11 in a state where the insulating sheet 16 is positioned with respect to the core back iron core 12.
[0030]
A stator winding 13 is wound around the side surface between the teeth cores 11. 12 is an explanatory view showing a winding process of the stator shown in FIG. As shown in the figure, the teeth iron core 11 is disposed on the outer peripheral surface of the substantially cylindrical teeth fixing jig 23 at a predetermined interval. At this time, a substantially U-shaped insulating sheet 14 is inserted and disposed between the winding portions of the tooth core 11 so that the tip end portion faces outward. At this time, the bottom surface portion of the insulating sheet 14 abuts against the protruding portion 17 at the front end on the inner peripheral side of the adjacent teeth iron cores 11, so that the insulating sheet 14 is prevented from falling off inward in the radial direction.
[0031]
Then, the stator winding 13 is wound around the winding portion on the side surface of each tooth core 11 by the nozzle 29. The nozzle 29 is set so that the stator winding 13 of the same phase is wound between the same teeth core 11 for each turn. For example, in the case of a three-phase motor, it is configured to supply a plurality of stator windings 13 in a bundled state corresponding to the U phase, the V phase, and the W phase. 13 is wound around each iron core 11. As described above, since the insulating sheet 14 is disposed between the side surfaces of the winding portions of the adjacent teeth cores 11, 11, the stator winding 13 is wound around the side surface of the winding portion via the insulating sheet 14. Is done.
[0032]
Note that the stator winding 13 is wound around the side surface of each tooth core 11 perpendicular to the side surface on which the insulating sheet 14 is disposed with a slight gap in order to make the tension uniform. For this reason, it is not necessary to arrange the insulating sheet 14 on the orthogonal side surfaces. Therefore, since the stator winding 13 and each tooth iron core 11 can be insulated, it is possible to eliminate the possibility that an excess current flows through each tooth iron core 11.
[0033]
And the core back | bag iron core 12 is inserted from the said outer periphery between each adjacent teeth iron cores 11 and 11. FIG. Since both ends 18 of the insulating sheet 16 are engaged with the grooves 26 formed on the inner peripheral surface 12a of the core back iron core 12, the insulating sheet 16 is reliably positioned on the core back iron core 12. An insulating sheet 16 can be inserted. Thereby, the inserted insulating sheet 16 can be reliably interposed between the core back iron core 12 and the stator winding 13, and the core back iron core 12 and the stator winding 13 can be reliably insulated. it can.
[0034]
Thus, when the core back iron core 12 is inserted between the teeth iron cores 11, 11, the inner peripheral surface 12 a of the core back iron core 12 comes into contact with the tip of the insulating sheet 14. When the core back core 12 is further inserted, the leading end portions of the insulating sheet 14 are bent by the inner peripheral surface 12a of the core back core 12 so as to be close to each other. Thus, since the insulation sheets 14 and 16 are interposed between the core back iron core 12 and the stator windings 13, the insulation can be further reliably performed. Although the height of the insulating sheet 14 is preferably higher than the height of the stator winding 13 as described above, the height is not limited to this and may be equal to the height of the stator winding 13.
[0035]
2 and 3 are a perspective view and a plan view showing respective modifications of the insulating sheet shown in FIG. Insulating sheets 30 and 40 shown in these drawings form, at both end portions 18, a bent portion 31 and a bent portion 41 that are bent or bent outward of the groove 26 in the circumferential direction of the core back core 12. These points are different from the insulating sheet 14. As described above, when the curved portions 31 and the bent portions 41 are formed in the insulating sheets 30 and 40, the curved portions 31 or the bent portions 41 are expanded when both ends of the insulating sheets 30 and 40 are engaged with the grooves 26. Diameter or reduced diameter. For this reason, it is possible to exert a clamping force so as to reduce or increase the diameter of the groove 26 from both ends of the insulating sheets 30 and 40, and more reliably position the insulating sheets 30 and 40 with respect to the core back iron core 12. It can be carried out. Thereby, the core back iron core 12 and the stator coil | winding 13 can be insulated more reliably.
[0036]
FIG. 4 is a perspective view showing the teeth iron core and the tip portion of the insulating plate in the second embodiment of the present invention. FIG. 5 is a side view of the tooth core and the insulating plate shown in FIG.
Each laminated steel sheet constituting the teeth core 51 has a plurality of caulking protrusions 52 and 53 protruding from both surfaces of the laminated steel sheet, and the same part as viewed from the lamination direction (in this case, the axial direction A described later). Provided. A pair of insulating plates 50 are respectively disposed on end surfaces of the tooth core 51 in the axial direction A (the direction A is the same as that shown in FIG. 12). The insulating plate 50 is formed with engagement holes 54 and 55 that engage with the caulking protrusions 52 and 53.
[0037]
Thus, since the said crimping protrusions 52 and 53 are provided in the same site | part seeing from the lamination direction, each laminated steel can be laminated | stacked by aligning the position of the crimping protrusions 52 and 53 of each laminated steel sheet. The heels can be positioned reliably. Further, since the caulking projections 52 and 53 are provided so as to protrude from both surfaces of the laminated steel plate, either one of the caulking projections 52 and 53 protrudes from each of the laminated steel plates constituting the end surface of the teeth iron core 51. . Therefore, it is possible to perform a caulking process on each laminated steel sheet constituting the end face of the teeth core 51. Furthermore, since the engagement holes 54 and 55 of the insulating plate 50 can be engaged with the caulking protrusions 52 and 53 protruding from the laminated steel sheet constituting the end surface, the teeth iron core 51 and the insulating plate 50 can be engaged. Therefore, the teeth core 51 and the stator winding 13 can be reliably insulated.
[0038]
FIG. 6 is an explanatory view showing a stator in the third embodiment of the present invention. Teeth core 64 in the present embodiment is provided with housing recess 66 on one of the side surfaces and on the outer peripheral side of stator winding 13.
The core back iron core 65 is formed in a substantially inverted L-shaped cross section including an inner projecting portion 74 and an outer peripheral abutting portion 75. The inner protrusion 74 is a part inserted between the teeth cores 64, and the outer peripheral contact part 75 is a part covering the outer peripheral surface of the teeth core 64. Since it did in this way, the outer peripheral surface of the teeth iron core 64 can be covered with the outer periphery contact portion 75 in a state where the inner protrusion 74 is inserted between the teeth iron cores 64, and the protection of the teeth iron core 64 can be enhanced. it can.
[0039]
The core back iron core 65 is provided with positioning protrusions 69 and positioning protrusions 68 on the inner side and the outer side of one side surface of the inner protrusion 74. The positioning convex portion 69 is formed to be engageable with the receiving concave portion 66, and the positioning convex portion 68 is formed to be engageable with a positioning concave portion 67 provided on a side surface of the outer peripheral abutting portion 75. The fastening force between the teeth iron core 64 and the core back iron core 65 can be further increased by engaging the positioning protrusions 69 with the receiving recesses 66 and the positioning protrusions 68 with the positioning recesses 67.
[0040]
FIG. 7 is a view of the insulating sheet and the core back core shown in FIG. FIG. 8 is a perspective view showing the insulating sheet shown in FIG.
As shown in these drawings, the insulating sheet 60 is formed in a U-shaped cross section, and has an inner peripheral portion 63 disposed in contact with the inner peripheral surface 76 of the core back iron core 65, and the axial direction A of the core back iron core 65. (This direction A is the same as that shown in FIG. 12) and end portions 61 and 62 disposed in contact with end surfaces 77 and 78.
Thus, since the insulating sheet 60 is disposed in contact with the inner peripheral surface 76, the one end surface 77, and the other end surface 78 of the core back core 65, the stator winding 13 and the core back core 65 are more reliably connected. Can be insulated.
[0041]
In addition, the core back iron core 65 according to the present embodiment is provided with a caulking concave portion 70 on one end surface 77 and a caulking convex portion 71 on the other end surface 78. The insulating sheet 60 includes an inner projecting piece 73 projecting inwardly at one end portion 61 and an opening 72 at the other end portion 62. Then, the inner projecting piece 73 is engaged with the caulking concave portion 70, and the opening 72 is engaged with the caulking convex portion 71, so that the insulating sheet 60 can be reliably engaged with the core back iron core 65. it can. Furthermore, since the caulking concave portion 70 and the caulking convex portion 71 can be prevented from being exposed to the outside, the core back iron core 65 and the stator winding 13 can be more reliably insulated.
[0042]
FIG. 9 is a perspective view showing a modification of the insulating sheet shown in FIG. The insulating sheet 80 shown in the figure has inner peripheral portions 83, 84, and 85 that are in contact with the inner peripheral surface 76 of the core back iron core 65 having a larger width than the inner peripheral surface 76. This is different from the insulating sheet 60. In this case, the portions 84 and 85 having a width larger than the inner peripheral surface 76 of the core back core 65 can be bent and inserted on the inner peripheral side of the teeth core 64, so that the core back core 65 and the teeth core can be inserted. 64 and the stator winding 13 can be more reliably insulated.
[0043]
FIG. 10 is a perspective view showing a modification of the insulating sheet shown in FIG. The insulating sheet 90 shown in the figure has end portions 61 and 62 that are in contact with one end surface 77 or the other end surface 77 of the core back iron core 65, and have a width larger than the end surfaces 77 and 78. This is different from the insulating sheet 60. In this way, the portion where insulation is ensured is expanded more than that of the insulating sheet 60, so that the stator winding 13 and the core back core 65 can be more reliably insulated.
Further, even when a portion of the stator winding 13 that protrudes outside the one end surface 77 or the other end surface 78 of the core back iron core 65 is bent to the one end surface 77 or the other end surface 78 of the core back iron core 65 ( 7 (c)), the portion of the insulation sheet 60 where insulation is ensured is expanded, so that the stator winding 13 and the core back core 65 can be more reliably insulated. The thickness of the stator winding 66 protruding from one end surface 77 or the other end surface 78 of the iron core 65 (coil end height) can be reduced.
[0044]
【The invention's effect】
As described above, according to the invention described in claim 1, the inserted insulating member is reliably interposed between the core back iron core and the stator winding, and the core back iron core and the stator winding are inserted. The wire can be reliably insulated.
Further, since the clamping force can be exerted so as to reduce or expand the diameter from both ends of the insulating member, the insulating member can be more reliably positioned with respect to the core back iron core. The core back iron core and the stator winding can be more reliably insulated.
According to the invention described in claim 2, it is possible to reduce the time required for mounting the stator windings, improve the space factor, and reliably connect the core back iron core and the stator windings. Can be insulated.
[Brief description of the drawings]
FIG. 1 is a perspective view of a core back iron core of a stator according to a first embodiment of the present invention, and a perspective view and a plan view of an insulating sheet engaged with the core back iron core.
2 is a perspective view and a plan view showing a modification of the insulating sheet shown in FIG. 1. FIG.
3 is a perspective view and a plan view showing a modification of the insulating sheet shown in FIG. 1. FIG.
FIG. 4 is a perspective view showing a tooth core and a tip portion of an insulating plate in a second embodiment of the present invention.
5 is a side view of the tooth core and the insulating plate shown in FIG. 4. FIG.
FIG. 6 is an explanatory view showing a stator in a third embodiment of the present invention.
7 is a view of the insulating sheet and the core back iron core shown in FIG. 6 as viewed from the direction of arrow P. FIG.
8 is a perspective view showing the insulating sheet shown in FIG. 7. FIG.
FIG. 9 is a perspective view showing a modification of the insulating sheet shown in FIG.
FIG. 10 is a perspective view showing a modification of the insulating sheet shown in FIG.
FIG. 11 is a schematic plan view of the stator according to the first embodiment of the present invention.
12 is an explanatory diagram showing a winding process of the stator shown in FIG. 11. FIG.
FIG. 13 is a schematic plan view of a conventional stator.
[Explanation of symbols]
10 Stator 11 Teeth Iron Core 12 Core Back Iron Core 13 Stator Winding 16 Insulation Sheet

Claims (2)

A stator comprising a plurality of teeth cores arranged at predetermined intervals on a predetermined circumference, and a plurality of core back cores arranged on the outer peripheral side between adjacent teeth cores,
A pair of grooves are formed on the inner peripheral surface of the core back core along the axial direction of the core back core,
Engage both ends of the insulating member having a substantially U-shaped cross section with the pair of grooves,
A stator having a bent portion or a bent portion that is bent or bent outward of the groove in a circumferential direction of the core back core at both ends of the insulating member .   A core-back core in which a stator winding is mounted from the outer peripheral side of the teeth core by a plurality of nozzles that simultaneously supply a plurality of stator windings, and the insulating member is engaged in advance between the adjacent teeth cores. Is inserted from the outer peripheral side of the teeth iron core.

Images