JP4093093B2 - Rotating electric machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a rotating electrical machine having a cooling passage inside a stator.
[0002]
[Prior art]
In order to cool the stator that generates heat in the rotating electrical machine, the inside of the slot in which the stator coil is accommodated is used as a cooling passage, and a refrigerant (for example, cooling oil) is flowed in the direction of the stator axis so Patent Document 1 proposes cooling.
[0003]
In this case, since the slot is opened facing the rotor side, the opening is filled with a resin material and closed, the internal cooling passage is blocked from the rotor side, and the refrigerant leaks to the rotor side. It seems that there is not.
[0004]
[Patent Document 1]
JP-A-4-364343
Problems to be Solved by the Invention
However, if the adhesion between the stator core and the resin material is poor, the water tightness of the cooling passage will be reduced, and the refrigerant may leak from the joint, and if the refrigerant leaks, the friction during rotation of the rotor will occur. Will increase and reduce the efficiency of the rotating electrical machine.
[0006]
An object of the present invention is to reliably prevent such refrigerant leakage in a rotating electrical machine.
[0007]
[Means for Solving the Problems]
In the rotating electrical machine of the present invention, a coil wound around the teeth portion of the stator core is accommodated in the slot, the opening portion of the slot facing the inner peripheral surface of the stator is closed, and a cooling passage for circulating the refrigerant is formed inside the slot. Yes. A plate formed in accordance with the shape of the teeth on both sides so as to close the opening of the slot is configured as at least two divided plates, and extends in the slot axial direction on the stator inner peripheral surface side of the plate. While forming a recessed part, a build-up part is formed in the both sides of the said recessed part, the opening part is obstruct | occluded by filling the said recessed part with a resin material and providing a filling layer.
[0008]
[Action / Effect]
Therefore, since the plate that closes the slot opening has a divided structure, even if the shape of the tooth portion is not the same in the slot axial direction, it can be easily assembled especially from the axial direction. It can be closed, and a good sealing property can be secured together with the resin filling layer filled on the inner peripheral surface side of the stator.
In addition, since the built-up portions are provided on both sides of the concave portion of the plate, not only can the plate strength be increased, but when the concave portion is filled with a resin material, the built-up portion is pressed from the side by the filling pressure. As a result, the pressing force of the plate toward the tip of the teeth is increased, and the adhesion with the tip of the teeth can be improved.
[0009]
Embodiment
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0010]
1 to 3 show a first embodiment in which a rotating electrical machine of the present invention is applied to a motor.
[0011]
1A is an enlarged cross-sectional view showing the stator, and FIG. 1B shows a shape of a tooth portion of a steel plate constituting the stator. FIG. 2 is an overall cross-sectional view of the rotating electrical machine, and shows a cross section taken along line XX of FIG. FIG. 3 shows a plate for closing the slot opening.
[0012]
Referring to FIG. 2 as a whole, the rotating electrical machine case 31 includes a cylindrical member 31A and side walls 31B and 31C that close the openings at both axial ends of the cylindrical member 31A. The rotor 20 is accommodated in the case 31. The rotor 20 has both ends of the rotating shaft 19 supported by side walls 31B and 31C via bearings 23, respectively, and is rotatable about the rotating shaft 19.
[0013]
A cylindrical stator 10 is disposed on the inner periphery of the cylindrical member 31 </ b> A so as to surround the outer periphery of the rotor 20. A minute gap (air gap) is provided between the inner peripheral surface of the stator 10 and the outer peripheral surface of the rotor 20.
[0014]
Cooling jackets 21 and 22 each having an annular space are formed between both axial ends of the stator 10 and the inside of the case 31. Cooling oil as a refrigerant is supplied to the cooling jacket 21 from an oil supply port 26 provided through the cylindrical member 31A. The cooling oil flows through a cooling passage 29 (see FIG. 2) formed in the slot of the stator 10 and is guided to the cooling jacket 22 on the opposite side. The cooling oil is discharged to the outside from an oil discharge port 27 formed on the cooling jacket 22 side and penetrating the cylindrical member 31A, and the stator 10 is cooled during this time.
[0015]
In order to form these cooling jackets 21 and 22, cylindrical portions 24 integrally formed with resin are provided on the extensions so as to have the same inner peripheral surface as the inner peripheral surface from both ends of the stator 10. The cylindrical portion 24 reaches the side walls 31B and 31C of the case 31, respectively, and the front ends thereof are inserted into the seal members 25 provided in the side walls 31B and 31C, so that the inner periphery of the cylindrical member 31A of the case 31 and the stator 10 An annular sealed space is defined between both ends, the outer periphery of the cylindrical portion 24, and the side walls 31B and 31C.
[0016]
In this way, by flowing the refrigerant in the slots of the stator 10 in the axial direction, the heat generating portion of the stator 10 is cooled and the temperature rise is suppressed.
[0017]
Next, as shown in FIG. 1, the stator 10 is mainly composed of a stator core 1 and a coil 2 wound around the stator core 1.
[0018]
The stator core 1 is formed by laminating a plurality of thin steel plates 11 made of a magnetic material in the axial direction. The steel plate 11 may be a silicon steel plate, for example. The stator core 1 includes a yoke part 1a on the outer peripheral side, a teeth body part 1b as a tooth part protruding from the yoke part 1a to the stator inner peripheral side (rotor 20 side), and an inner peripheral tooth tip facing the rotor 20. Part 1c. Of these, the coil 2 is wound around the tooth body 1b by, for example, concentrated winding, and the coil 2 is not wound around the tooth tip 1c. Concentrated winding can reduce the coil end height and reduce copper loss.
[0019]
In this way, the stator 10 has a plurality of salient poles, that is, teeth portions, formed by the tooth body portion 1b and the tooth tip portion 1c at equal intervals in the circumferential direction. The portion 1b has a substantially symmetric shape with respect to the central plane 15 that faces the central axis direction of the stator 10.
[0020]
A slot 5 is formed between each tooth portion, and the coil 2 wound around the tooth portion is accommodated in the slot 5. For the purpose of improving workability when the coil 2 is wound and preventing the displacement of the coil 2, coil stopper portions 1 d are protruded on both sides of the teeth portion of the stator core 1.
[0021]
Inside the stator 10, a rotor 20 is arranged coaxially with the stator 10 via a gap serving as an air gap. The central axis of the substantially cylindrical stator 10 coincides with the rotation center of the cylindrical rotor 20. ing. The rotor 20 is provided with a permanent magnet (not shown) that forms a field. By passing an alternating current through the coil 2, the stator 10 generates a rotating magnetic field, and the rotor 20 rotates around the rotating shaft 19 mainly by the action of the rotating magnetic field and the permanent magnet.
[0022]
Each teeth body portion 1b of the stator core 1 is symmetric with respect to a radial plane 15 toward the central axis of the stator 10, and this plane 15 is the center in the width direction (circumferential direction) of each teeth body portion 1b. It becomes.
[0023]
Next, on the stator core 1, two types of steel plates having different centers in the circumferential direction of the tooth tip portion 1c (that is, the width direction of the tooth tip portion 1c) are laminated in the axial direction by approximately the same number. That is, the A part in which a predetermined number of steel plates 11a are stacked such that the center 16 of the tooth tip is shifted to one side with respect to the center of the tooth body part 1b, and the center 16 of the tooth tip is the A part. The stator core 1 is composed of a portion B in which the steel plates 11b are displaced in the opposite direction.
[0024]
The thicknesses in the axial direction of the A part and the B part are substantially the same. Such a configuration is the same for all teeth portions provided at equal intervals in the circumferential direction.
[0025]
A part of FIG. 1 shows a cross-sectional view perpendicular to the axial direction of the A part and the B part. This cross section shows the shape of the steel plate 11a constituting the A portion and the steel plate 11b constituting the B portion at the same time. As described above, in the upper part A and the lower part B in the axial direction, the steel plate center 16 in the width direction of the tooth tip 1c is opposite to each other in the circumferential direction from the center 15 of the tooth body 1b. It is shifted.
[0026]
In general, it is known that the torque fluctuation of the permanent magnet motor depends on the relative angular position of the stator and the rotor. Therefore, here, the torque waveforms generated in the A part and the B part are slightly out of phase. . When there is a skew in this way, the torque generated by the A portion has a waveform whose phase is slightly advanced compared to the torque generated by the B portion, and the motor as a whole has a waveform torque, but there is no skew. The torque peak is lower than that of the motor.
[0027]
Thus, by laminating a plurality of types of steel plates having different positions in the circumferential direction at the center of the tooth tip portion in the axial direction, the peak of the torque waveform can be suppressed and torque fluctuation can be reduced. Furthermore, in this case, the teeth body portion 1b around which the coil is wound is exactly the same as the motor without skew, so that the coil length when the coil is wound does not become long, and therefore the copper loss does not increase. . In addition, this is not only by laminating | stacking two types of steel plates, but the same effect is acquired even if it is three or more types of steel plates.
[0028]
In such a rotating electric machine, in order to configure the slot 5 as a sealed coolant cooling passage, the opening of the slot 5 is closed by the plate 3, and in this case, as described above, the tip of the tooth Since the shape of 1c is different in the middle of the slot axis direction, the plate 3 for closing the opening is formed in a shape that matches the A and B portions as shown in FIG. Two divided plates 3a and 3b are provided.
[0029]
These plates 3a and 3b are formed symmetrically on the front and back, and are positioned between the two tooth tip portions 1c facing each other across the slot 5 and on the lower surface of the coil stopper portion 1d. Inserted and fitted from the opposite side.
[0030]
And each plate 3a, 3b is comprised as a part of circumferential surface so that a part of the lower surface forms a part on the extension of the front-end | tip circumferential surface of the teeth front-end | tip part 1c, Without interfering with the coil 2 in the slot 5, it has inclined portions 6 a and 6 b having apexes at positions that coincide with the center of the slot, and the cross section has an umbrella shape as a whole. However, one inclined portion 6a is formed longer than the other inclined portion 6b so as to enter the deep recess portion 11e on the lower surface of the coil stopper portion 1d, which is caused by the deviation from the center of the steel plates 11a and 11b. . As described above, the tip of the inclined portion 6a has a lower surface that is a part of the same circumferential surface as the lower surface of the tooth tip 1c, and an inner surface that coincides with the side of the tooth body 1b. A built-up portion 6c extending up to is formed.
[0031]
Further, on the outer surface of the plates 3a and 3b facing the rotor, a recess 6e having a substantially uniform depth is formed on the circumferential surface. In this case, there is no thick portion at the end of the shorter inclined portion 6b, and the recess 6e reaches the end surface. And the front-end | tip of this inclination part 6b contact | abuts to the shallow hollow part 11f of the lower surface of the coil stopper part 1d of the teeth front-end | tip part 1c. This shallow hollow portion 11f is at the same position as the side surface of the tooth body portion 1b. Eventually, the tip of the inclined portion 6b is at the same position as the side surface of the tooth body portion 1b.
[0032]
Therefore, as shown in FIG. 3B, by fitting these two plates 3a and 3b corresponding to the A and B portions of the slot 5, the concave portion 6e has the same width in the slot axial direction. A continuous shallow groove is formed.
[0033]
The plates 3a and 3b are inserted from the end surfaces opposite to each other in the axial direction with respect to the slot 5, and completely close the slot 5 with the insertion tips closely contacting each other. In this case, in order to firmly restrain the mounted plates 3a and 3b and not to drop off to the rotor side in particular, the recess portions 11e and 11f provided on the lower surface of the coil stopper portion 1d of the tooth tip portion 1c have end surfaces facing each other. It is formed in the radial direction toward the rotor rotation center, and a predetermined included angle is formed by the mutual end surfaces.
[0034]
As shown in FIGS. 1 and 2, a filling layer 7 of a resin material is formed in the recess 6e on the rotor side of the plates 3a and 3b. The resin filling layer 7 is formed integrally with the cylindrical portion 24 connected to both ends of the stator 10 in FIG. 2, and this molding process is performed, for example, as follows.
[0035]
When the plates 3a and 3b are fitted into the slots 5 of the stator 10 from the opposite axial directions, a cylindrical inner mold for resin molding is arranged on the inner periphery thereof. In addition, an adhesive is previously applied to the fitting surface between the plates 3a and 3b and the tooth tip 1c, and the adhesive is also applied to the joint surfaces of the plates 3a and 3b so that mutual adhesion is achieved. Is increased.
[0036]
The inner mold has an outer diameter that is in close contact with the inner peripheral surface of the stator, that is, the inner peripheral surface of the tooth tip 1c. Therefore, the portion of the recess 6e provided in the plates 3a and 3b becomes a filling space for the resin material, Filled with resin material. In this case, in order to integrally form the cylindrical portion 24 made of a resin material at both axial ends of the stator 10, the inner mold extends to both axial ends of the stator 10, and the both extended end portions The cylindrical outer molds are coaxially arranged with an annular gap corresponding to the wall thickness of the cylindrical portion 24, and the resin material filled between the inner mold and the outer mold is provided. A cylindrical portion 24 is formed.
[0037]
When the recess 6e is filled with a resin material, the resin material filled from the stator axial direction forms a series of shallow grooves of the same width extending in the axial direction as shown in FIG. Therefore, the flow of the resin material becomes smooth when the resin material is filled, and a uniform and good resin molding process can be performed without generating bubbles.
[0038]
The plates 3a and 3b are each provided with a built-up portion 6c on a long inclined portion 6a, thereby partitioning one side of the recess 6e and opening the recess 6e on the opposite side. When the material is filled, the build-up portion 6c is pressed from the side by the filling pressure, thereby increasing the pressing force of the plates 3a and 3b toward the tooth tip 1c, and the adhesion to the tooth tip 1c is enhanced. .
[0039]
Thus, even if the shape of the tooth tip 1c that forms a part of the slot 5 is different in the stator axial direction, the divided plates 3a and 3b having shapes corresponding thereto are fitted, Furthermore, the plates 3a and 3b are in close contact with each other by the resin filling layer 7 filling the recesses 6e of the plates 3a and 3b, and are also in close contact with the tooth tip portions 1c on both sides thereof, thereby maintaining high sealing performance. It becomes possible to reliably prevent the refrigerant from leaking from the cooling passage 29 formed inside the slot 5.
[0040]
Further, since the resin filling layer 7 is integrally formed with the cylindrical portions 24 at both ends of the stator, leakage of the refrigerant in the cooling jackets 21 and 22 partitioned by the cylindrical portions 24 can be surely prevented and also in terms of strength. Sufficient durability.
[0041]
Further, the plates 3a and 3b fitted into the slot 5 are inserted from the opposite sides in the slot axial direction so that the end surface shapes of the recessed portions 11e1 and 1f of the tooth tip portion 1c are changed from the plate 3a to the rotor side. By forming so that 3b does not fall off, the support of the plates 3a and 3b during the resin molding process is stabilized, and the productivity can be improved.
[0042]
Next, a second embodiment will be described with reference to FIG.
[0043]
In this embodiment, the built-up portions 6c and 6d are provided on both sides of the recess 6e of the plates 3a and 3b.
[0044]
In this case, the shape of both the built-up portions 6c and 6d is not the same, and the width of the built-up portion 6d provided on the short inclined portion 6b is smaller than the width of the built-up portion 6c of the long inclined portion 6a. When the plates 3a and 3b are short and are assembled in conformity with the shape of the tooth tip portion 1c, the concave portions 6e of the plates 3a and 3b can form continuous and shallow grooves of the same width, respectively. The widths of the built-up portions 6c and 6d are set.
[0045]
In this way, by providing the built-up portions 6c and 6d at both ends of the plates 3a and 3b, the strength of the plates 3a and 3b increases, and even if the resin filling pressure is increased during the molding process, it can sufficiently withstand. .
[0046]
Further, even if the built-up portions 6c and 6d are provided in this way, the recess 6e forms a continuous shallow groove having the same width, so that the flow at the time of filling the resin material is not deteriorated. In order to give the resin-filled layer 7 a high strength, good workability can be maintained even when a high viscosity resin material containing a lot of fibers is used.
[0047]
Further, a third embodiment will be described with reference to FIG.
[0048]
In this embodiment, a protrusion 6g is further formed at the center of the recess 6e with respect to the plates 3a and 3b of FIG. In this case, the recess 6e filled with the resin is divided into two and the groove width is further narrowed, so that it can withstand even higher pressure.
[0049]
The protrusion 6g has the same height as the built-up portions 6c and 6d on both sides, and is formed in the center so that two concave portions 6e form a continuous groove having the same width.
[0050]
A fourth embodiment will be described with reference to FIG.
[0051]
As shown in the figure, the plates 3a and 3b are formed with a built-up portion 6h only on one side, the width of the built-up portion 6h changes in the axial direction, and the width gradually decreases. That is, the width of the built-up portion 6h is formed obliquely with respect to the axial direction of the plates 3a and 3b, has almost no width at one end, and the maximum width at the other end, in this example, located at the center from both sides of the plates 3a and 3b. It is formed in a triangular shape.
[0052]
Thus, when the plates 3a and 3b are connected, the groove width of the recess 6e gradually decreases toward the connecting portion, and gradually increases again after the joint portion.
[0053]
Even if formed in this way, the resin flow in the recess 6e becomes smooth when the resin is filled, and good workability can be maintained even for a resin material containing a lot of high-strength fibers.
[0054]
FIGS. 7A to 7F show modifications in which the groove widths of the recesses 6e of the plates 3a and 3b change as described above.
[0055]
(A) and (b) of FIG. 7 are a combination of the built-up portion 6h whose width changes linearly and obliquely and the built-up portion 6c of the same width. (C) (d) (e) is a combination of the built-up portions 6h whose width changes linearly as in FIG.
[0056]
7 (a) and 7 (b), the slope of the built-up portion 6h whose width changes is different, and the latter has no built-up portion 6h in the middle.
[0057]
(C), (d), and (e) in FIG. 7 are formed with the built-up portion 6h only on one side, and in the latter, the length of the built-up portion 6h is further shortened. In FIG. 7 (f), one plate 3a has a shape without any build-up portion.
[0058]
In any case, the recess 6e formed in the plates 3a and 3b is formed to have a groove width that is continuous in the axial direction as much as possible, and is formed so as not to hinder the flow of the resin material as much as possible.
[0059]
FIGS. 8 (a) and 8 (b) show a further modification. The plates 3a and 3b are formed such that their joint portions have an inclined surface 8a rather than being perpendicular to the axial direction.
[0060]
Note that (a) and (b) differ in the inclination angle of the inclined surface 8a.
[0061]
As described above, when the plates 3a and 3b are abutted with each other with an oblique joint portion, the adhesiveness of the joint surface is improved by pressing the plates 3a and 3b from the axial direction.
[0062]
FIGS. 9A and 9B show a further modification. In this case, the plate 3 has a dividing surface extending in the axial direction. That is, a plate 3c, 3d vertically divided at the central portion extending in the axial direction of the slot 5 is provided, and by combining these, the slot opening is closed.
[0063]
In FIG. 9A, in the plates 3c and 3d, the joint surfaces 8c are formed in a straight line in the axial direction, but the side surface on the opposite side in contact with the tooth tip 1c is the shape of the tooth tip 1c. The built-up portion 6c is formed only on the outer side of the wide portion that changes into a stepped shape according to the A portion and the B portion.
[0064]
By joining these plates 3c and 3d, a recess 6e having the same width continuous in the axial direction is formed, and as a result, good workability at the time of filling the resin material is maintained.
[0065]
Further, in FIG. 9B, the plates 3c and 3d are each formed with a built-up portion 6j in both a wide portion and a narrow portion, and the portion facing the recessed portion 6e inside the built-up portion 6j is It becomes a straight line and forms a recess 6e having the same width, thereby increasing the strength of the plates 3c and 3d, maintaining a good flow of the filling resin, and enabling high-quality resin filling.
[0066]
FIGS. 10A to 10D show further modifications, and the drawing schematically shows a cross section of each joint surface of the plates 3a, 3b or 3c, 3d.
[0067]
As can be understood from these drawings, the joint surfaces of the plates 3a, 3b or 3c, 3d have various combinations of cross sections.
[0068]
That is, (a) is a joining surface 8d with a vertical plate end surface, (b) is an arcuate joining surface 8e, (c) is a stepped groove-like joining surface 8f, and (d) is a triangular shape. The joint surface 8g, (e) is an inclined joint surface 8h.
[0069]
Accordingly, particularly in FIGS. 10B to 10E, the bonding surface exhibits high adhesion to the pressure from the upper surface or the lower surface of the plates 3a, 3b or 3c, 3d, and the resin-filled layer 7 is formed. Even when the filling pressure is high, it is possible to reliably prevent resin leakage.
[0070]
Next, a fifth embodiment will be described with reference to FIGS.
[0071]
In this embodiment, on the stator core 1, three types of steel plates having different centers in the circumferential direction of the tooth tip 1c (that is, the width direction of the tooth tip 1c) are laminated in the axial direction by approximately the same number. Yes. That is, a portion A in which a predetermined number of steel plates 11a are stacked such that the center of the tooth tip is shifted to one side with respect to the center of the tooth body 1b, the center of the teeth body 1b, and the tooth tip C part in which a predetermined number of steel plates 11c such that the centers of 1c coincide with each other, and B part in which steel plates 11b in which the center of the tooth tip 1c is shifted in the direction opposite to the A part are laminated. Thus, the stator core 1 is configured.
[0072]
The thicknesses in the axial direction of the A part, the B part, and the C part are substantially the same. Such a configuration is the same for all teeth portions provided in the circumferential direction. In the case of this motor, the motor torque waveform described above is further smoothed, and the torque peak can be further reduced.
[0073]
When the tooth tip 1c is formed in three types of shapes in this way, the plate 3 that closes the opening of the slot 5 is in the slot axial direction, like the plates 3c and 3d in FIG. Vertically divided plates 3c and 3d are provided, and these plates 3c and 3d are divided at the center, but the outer side faces thereof correspond to the A, B and C portions, and match the shape of the tooth tip 1c. Thus, it is formed in a stepped shape that changes in three stages.
[0074]
In this case, in FIG. 12 (a), the oblique built-up portions 6h are formed on both sides of the plates 3c and 3d, and the change in the groove width of the recess 6e is minimized. In FIG. 12 (b), the diagonally overlaid portion 6h is provided only on one side plate 3d. In FIG. 12C, a built-up portion 6c is also provided on the divided surface side of the plates 3c and 3d, thereby forming two concave portions 6e.
[0075]
For these multi-stage skew structures, the resin plates 7c and 3d corresponding to these are fitted, and the resin material is filled in the recesses 6e to form the resin-filled layer 7. Thus, it is possible to reliably prevent the refrigerant from leaking from the slot 5.
[0076]
In each of the above-described embodiments, as in the first embodiment, the adhesiveness is further enhanced by combining the plate joint surface and the plate fitting surface with an adhesive applied, and the refrigerant seal Can also be improved.
[0077]
In addition, although only two examples of the plate are shown, a plate divided into two or more parts is used, such as a combination of a vertically divided part and a horizontally divided part, if necessary, corresponding to the slot shape. It is also possible.
[0078]
The present invention is not limited to the above-described embodiments, and it is obvious that various modifications and improvements that can be made by those skilled in the art are included within the scope of the technical idea described in the claims.
[Brief description of the drawings]
1A and 1B show a first embodiment of the present invention, in which FIG. 1A is a cross-sectional view of a stator, and FIG. 1B is a front view of a tooth portion;
FIG. 2 is a cross-sectional view taken along the line XX in FIG.
3A and 3B show a plate, in which FIG. 3A is a perspective view, and FIG. 3B is a bottom view.
4A and 4B show a second embodiment, in which FIG. 4A is a cross section of a stator, and FIG. 4B is a perspective view of a plate.
5A and 5B show a third embodiment, in which FIG. 5A is a cross section of a stator, and FIG. 5B is a perspective view of a plate.
FIG. 6 is a perspective view of a plate showing a fourth embodiment.
FIGS. 7A to 7E are explanatory views showing the concave shape of the plate, respectively.
FIGS. 8A and 8B are explanatory views showing a diagonally divided structure of plates. FIG.
FIGS. 9A and 9B are explanatory views showing the vertically divided structure of the plates, respectively.
FIGS. 10A to 10E are cross-sectional views of plate joint surfaces, respectively.
FIG. 11 is a cross-sectional view of a stator according to a fifth embodiment.
FIGS. 12A to 12C are explanatory views showing the mounting state of the plates, respectively.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Teeth part 1b Teeth body part 1c Teeth tip part 2 Coil 3 Plates 3a, 3b, 3c, 3d Divided plate 5 Slot 6a Long inclined part 6b Short inclined part 6c Overlay part 6e Recessed part 6h Diagonal overlay part 7 Resin Packing layer 10 Stator 20 Rotor

Claims (12)

In the rotating electrical machine in which the coil wound around the teeth portion of the stator core is accommodated in the slot, the opening portion of the slot facing the inner peripheral surface of the stator is closed, and the cooling passage for circulating the refrigerant in the slot is formed.
A plate formed according to the shape of the teeth on both sides so as to close the opening of the slot is configured as at least two divided plates,
The opening is formed by forming a recess extending in the slot axial direction on the stator inner peripheral surface side of the plate, forming a built-up portion on both sides of the recess, and filling the recess with a resin material to provide a filling layer. Blocked the part,
Rotating electric machine characterized by that.   The teeth portion of the stator core has a teeth body portion around which the coil is wound and a teeth tip portion around which the coil is not wound, and the center position in the circumferential direction at the teeth tip portion is a circle of the teeth body portion. A plurality of types of steel plates arranged so as to deviate from the center in the circumferential direction are laminated in the axial direction, and the plate is fitted between adjacent tooth tips to close the opening. The rotating electrical machine described in 1.   3. The rotating electrical machine according to claim 1, wherein the plate is divided by a plane crossing a slot axial direction corresponding to a shape of the tooth portion.   3. The rotating electrical machine according to claim 1, wherein the plate is divided along a center in a slot axial direction corresponding to a shape of the tooth portion. The built-up portion has a lower surface forming the same circumferential surface as the stator inner circumferential surface,
The rotating electrical machine according to any one of claims 1 to 4, wherein The build-up portion is formed in parallel to the slot axis direction with a predetermined width,
The rotating electrical machine according to any one of claims 1 to 5, wherein The build-up part is formed to be inclined in the slot axis direction so that its width gradually changes,
The rotating electrical machine according to any one of claims 1 to 5, wherein Joining the plates so that the recess has a width continuous in the axial direction;
The rotating electrical machine according to any one of claims 1 to 7, wherein A protrusion extending in the axial direction is formed at the center of the concave portion of the plate,
The rotating electrical machine according to any one of claims 1 to 8, wherein The joint surface of the plate is in close contact with each other, an arc surface, an inclined surface, an uneven surface is formed,
The rotating electrical machine according to any one of claims 1 to 9, wherein An adhesive is applied to the mating surface between the plate and the tooth portion,
The rotating electrical machine according to any one of claims 1 to 10, wherein An adhesive is applied to the joint surface of the plate,
The rotating electric machine according to any one of claims 1 to 11, wherein

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