JP2004336998A - Rotating electric machine and method for manufacturing rotating electric machine - Google Patents

Abstract

A rotating electric machine using a slot inside a stator as a coolant passage or a method of manufacturing the same provides a coolant passage that can be manufactured rationally and that achieves high cooling efficiency.
A plate is mounted in a plate holding groove formed near an opening of a slot of a stator, and resin is injected and filled into a space defined on an outer surface of the plate. Thus, a resin layer 50 is formed. The plate 40 is pressed against the stopper portion 27 by the filling pressure of the resin and is brought into close contact therewith, and is sealed so that the resin does not leak into the slot 25. The plate 40 is provided with legs 42 that extend into the slot 25. When the plate 40 is deformed, the tip of the leg 42 abuts on the bottom of the slot 25, and the deformation of the plate 40 is limited.
[Selection] Figure 2

Description

  The present invention relates to a rotating electric machine and a method for manufacturing the rotating electric machine.

  In a rotating electric machine (motor or generator, or motor / generator), in order to efficiently cool the stator, the inside of a slot of the stator (a groove in which the stator coil is housed) is used as a refrigerant passage, and the stator is cooled. Ones in which the coil can be directly cooled have been proposed in, for example, Patent Documents 1 and 2.

  Among these, the rotating electric machine of Patent Document 1 fills the opening of the slot with a paste-like resin and cures it, and then sprays a ceramic material on the inner peripheral surface of the stator to form a shielding layer and close the slot opening. In addition, the refrigerant is circulated inside the slot defined by this. However, in such a method, if the width of the slot opening is larger than a certain size, it becomes difficult to fill the paste-like resin.

On the other hand, in the rotating electric machine disclosed in Patent Document 2, a mold is arranged on the inner peripheral side of the stator and inside the slot, and an engineering plastic material is injected and filled into a space defined by the stay core and the mold, and this is filled. The slot opening is closed by curing. This method can be adopted irrespective of the width of the slot opening, unlike the method of Patent Document 1, and does not require a special processing step such as spraying a ceramic material, and is relatively inexpensive. , A refrigerant passage can be formed.
JP-A-53-95207 JP-A-4-364343

  However, in the method of Patent Document 2, after the filled engineering plastic material is cured, it is necessary to extract the molds respectively disposed on the inner peripheral side of the stator and inside the slot. For this reason, when extracting the metal mold | die arrange | positioned inside a slot, there exists a possibility that the thin electromagnetic steel sheet which comprises a stator core may be dragged up by a metal mold | die and may be turned up, or a malfunction that a stator core may be damaged may arise.

  Also, the space after the mold is removed becomes a part of the refrigerant passage, but since this space is separated from the stator coil, a good coil cooling effect cannot be obtained even if a large amount of refrigerant flows here. The passage cross-sectional area of the refrigerant passage is unnecessarily widened by the space. Therefore, a large flow rate of the refrigerant is required to achieve the desired oil cooling effect, and the capacity of the pump for circulating the refrigerant must be increased.

  The present invention has been made in view of such a problem, and in a rotating electric machine or a method for manufacturing the same, which uses the inside of a slot of a stator as a refrigerant passage, the refrigerant passage can be rationally manufactured. It is an object of the present invention to provide a device capable of obtaining high cooling efficiency.

  According to a first aspect of the present invention, in a rotating electric machine having a stator accommodating a coil in a slot and forming a refrigerant passage inside the slot by closing the opening of the slot, the rotating electric machine is disposed near the opening of the slot. And a resin layer formed by filling a resin on an outer surface of the plate, and the opening of the slot is closed by the plate and the resin layer.

  In a second aspect based on the first aspect, the plate is provided with a leg extending into the slot.

  In a third aspect based on the second aspect, the leg is disposed substantially at the center of the slot.

  In a fourth aspect based on the first aspect, a stopper portion is provided on the inner peripheral surface of the slot so as to project when the plate is pushed inward of the slot by the pressure at the time of filling the resin. So that it was supported in close contact with the part.

  In a fifth aspect based on the fourth aspect, the plate is formed of an elastic member.

  In a sixth aspect based on the fourth or fifth aspect, the plate is provided with a leg extending into the slot, and the length of the leg is supported by the plate being in close contact with the stopper. Sometimes the length does not touch the bottom of the slot.

  In a seventh aspect based on the sixth aspect, when the plate is deformed due to the pressure at the time of filling, the leg portion comes into contact with the slot bottom to suppress the deformation.

  In an eighth aspect based on the first aspect, the projections are provided on the outer side of the plate near the opening of the slot, while the plate is provided with a leg extending into the slot, and the leg is provided at the bottom of the slot. The outer surface of the plate is brought into close contact with the inner surface of the protrusion by contacting the inner surface of the plate.

  In a ninth aspect, in any one of the fourth to eighth aspects, the resin is filled after an adhesive is applied to a gap between the plate and the inner peripheral surface of the slot. .

  According to a tenth aspect of the present invention, in the method for manufacturing a rotating electric machine in which a slot opening of a stator is closed to form a refrigerant passage inside the slot, a plate is provided inside the slot opening, and a plate is provided on an outer surface of the plate. The slot opening is closed by filling a resin.

  In an eleventh aspect based on the tenth aspect, the plate is in close contact with the stopper portion protruding from the inner peripheral surface of the slot when the plate is pushed inward of the slot by the pressure at the time of filling the resin. To be supported.

  In a twelfth aspect based on the eleventh aspect, the plate is formed of an elastic member.

  In a thirteenth aspect based on the eleventh or twelfth aspect, the plate includes a leg extending into the slot, and the length of the leg is supported by the plate being in close contact with the stopper. Sometimes the length does not touch the bottom of the slot.

  According to a fourteenth aspect, in the thirteenth aspect, when the plate is deformed by the pressure at the time of filling, the leg portion comes into contact with the slot bottom to suppress the deformation.

  In a fifteenth aspect based on the tenth aspect, a projection is provided on the outer side of the plate near the opening of the slot, and the plate has a leg extending inside the slot, and the leg is provided at a bottom of the slot. The outer surface of the plate is brought into close contact with the inner surface of the protrusion by contacting the inner surface of the plate.

  In a sixteenth aspect, in any one of the tenth to fifteenth aspects, the resin is filled after an adhesive is applied to a gap between the plate and the inner peripheral surface of the slot. .

  According to the rotating electric machine of the first invention and the method of manufacturing the rotating electric machine of the tenth invention, the resin layer is formed by filling the resin on the outer surface of the plate disposed near the opening of the slot. Does not need to be removed after the resin layer is formed. Therefore, as in the case where a core (die) is used inside the slot, the electromagnetic steel sheet constituting the stator is turned up or damaged in the work after the resin layer is formed. No inconvenience occurs. In addition, since the resin is filled at a required pressure, the resin spreads to every corner of a space to be filled (for example, a space defined by a mold on the outer surface of the plate), and a good resin layer is formed. Obtainable. Therefore, a high-performance rotating electric machine in which the inside of the slot is a refrigerant passage can be efficiently manufactured.

  According to the rotating electric machine of the second invention, since the plate is provided with the leg extending into the slot, the passage cross-sectional area of the refrigerant passage inside the slot is reduced by the integral of the cross-section of the leg. Therefore, compared with the case where the same flow rate of the refrigerant flows through the refrigerant flow path in which the cross-sectional area of the passage is not narrowed by the legs, the flow rate of the refrigerant is increased and the cooling efficiency is improved, so that the same cooling effect is obtained. The required capacity of the refrigerant circulation pump can be reduced, and the required amount of refrigerant can be reduced. Further, the degree to which the cross-sectional area of the refrigerant passage is reduced can be adjusted by the cross-sectional area of the leg, so that the cooling structure can be designed rationally.

  According to the rotating electric machine of the third aspect of the present invention, since the leg is disposed substantially at the center of the slot, the refrigerant passage is formed near the inner peripheral surface of the slot around which the coil is wound. Therefore, the refrigerant circulates in the vicinity of the coil, and can perform efficient cooling.

  According to the rotating electric machine of the fourth invention and the method of manufacturing the rotating electric machine of the eleventh invention, the plate pressed by the pressure at the time of filling the resin is supported in close contact with the stopper portion, so that the resin is placed inside the slot. Leakage can be effectively prevented.

  According to the rotating electrical machine of the fifth aspect and the method of manufacturing the rotating electrical machine of the twelfth aspect, the plate is formed of an elastic member. Therefore, when the plate is in close contact with the stopper portion, the stopper portion bites into the plate to provide high contact. The degree is obtained, and more reliable sealing can be performed.

  According to the rotary electric machine of the sixth aspect and the method of manufacturing the rotary electric machine of the thirteenth aspect, even when the plate is pushed in by the filling pressure, the leg does not abut against the bottom of the slot. Is not hindered, and the sealing is reliably performed.

  According to the rotary electric machine of the seventh aspect and the method of manufacturing the rotary electric machine of the fourteenth aspect, the deformation of the plate is limited by the leg portions abutting against the bottom of the slot. It is possible to select a small material and set the filling pressure relatively high. As a result, the degree of close contact between the plate and the stopper portion can be increased, and more reliable sealing can be performed.

  According to the rotating electric machine of the eighth invention and the method of manufacturing the rotating electric machine of the fifteenth invention, the leg of the plate abuts against the bottom of the slot, so that the outer surface of the plate is in close contact with the inner surface of the projection and the seal is formed. Therefore, the shape of the slot of the stator can be simplified (for example, a stopper is not required).

  According to the rotating electric machine of the ninth invention and the method of manufacturing the rotating electric machine of the sixteenth invention, the adhesive is applied to the gap between the plate and the inner peripheral surface of the slot before filling with the resin. Even if there are irregularities on the inner peripheral surface of the stacked stator slots, reliable sealing can be performed.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

  FIG. 1 is a side sectional view of a rotating electric machine (motor or generator, or motor and generator).

  As shown in the figure, the case 1 of the rotating electric machine includes a cylindrical plate 1A and side plates 1B and 1C for closing openings at both axial ends of the cylindrical plate 1A.

  A cylindrical rotor 2 is accommodated in the case 1. The rotor 2 has both ends of a rotating shaft 2A supported by side plates 1A and 1B via bearings 3, respectively, and is rotatable about the rotating shaft 2A. A magnet 4 is provided near the outer peripheral surface of the rotor 2.

  A cylindrical stator 5 is inserted into the inner peripheral surface of the cylindrical plate 1A so as to surround the rotor 2. A predetermined gap is provided between the inner peripheral surface of the stator 5 and the outer peripheral surface of the rotor 2.

  Ring-shaped oil jackets 10 and 11 each having a U-shaped cross section are attached to both axial ends of the stator 5. Oil chambers 12 and 13 are formed between the inside of these oil jackets 10 and 11 and the end face of the stator 5. Cooling oil is supplied to the oil chamber 12 through an oil supply port 16 formed in the oil jacket 10 and penetrating the cylindrical plate 1A. This cooling oil flows through a refrigerant passage 29 (see FIG. 2) formed in the stator 5 and is guided to the oil chamber 13. The cooling oil guided to the oil chamber 13 is discharged outside through an oil discharge port 17 formed in the oil jacket 11 and penetrating the cylindrical plate 1A.

  FIG. 2 is a diagram showing a part of the XX section of FIG.

  As illustrated, the stator 5 includes a stator core 20 and a coil 30 wound around the stator core 20.

  The starter core 20 is configured by connecting a predetermined number (twelve in the present embodiment) of divided cores 21 in an annular shape (divided core structure). Each divided core 21 is formed by laminating a predetermined number of substantially T-shaped electromagnetic steel sheets in the direction of the rotation axis 2A of the rotor 2 (perpendicular to the plane of FIG. 2) (see FIG. 4). FIG. 2 shows three of the twelve split cores 21 constituting the stator core 20.

  The stator core 20 includes a ring-shaped back core portion 22 that extends along the inner peripheral surface of the cylindrical plate 1A of the case 1 and a plurality of teeth portions 23 that protrude from the back core portion 22 in the radial direction on the inner peripheral side of the stator core 20. A recess (groove) between adjacent teeth 23 becomes a slot 25. The coil 30 is housed inside the slot 25 by being concentratedly wound around each of the teeth portions 23.

  On both side surfaces near the tip of the teeth portion 23 (the inner peripheral surface near the opening of the slot 25), a projecting portion 26 is provided. Further, a stopper 27 is provided on the base end side of the teeth 23 (inside the slot 25) with respect to the protrusion 26. The groove between the protrusion 26 and the stopper 27 serves as a plate holding groove 28 in which a plate 40 described later is mounted. As described later, the stopper portion 27 has a function of supporting the plate 40 when the resin layer 50 is filled and a function of defining a winding range of the coil 30 around the teeth portion 23.

  The opening of each slot 25 is closed by the plate 40 and the resin layer 50. Thereby, the space inside the slot 25 is defined, and becomes the refrigerant passage 29 through which the cooling oil flows.

  The plate 40 includes a main body 41 disposed in the opening of the slot 25 and legs 42 extending from the substantially central portion of the rear surface of the main body 41 to the inside of the slot 25 (see FIG. 7). The resin layer 50 is formed by injecting and filling a resin on the outer surface 43 of the plate 40 (outside of the slot 25, that is, the surface facing the inner peripheral side of the stator core 5).

  Both sides of the plate 40 are accommodated in the plate holding groove 28 described above. The dimensions of the main body 41 and the plate holding groove 28 of the plate 40 are designed such that an appropriate play occurs between the main body 41 and the plate holding groove 28. Due to this play, the inner surface of the plate 40 (the surface facing the inside of the slot 25) faces the support surface of the stopper 27 (the surface of the body 40 of the plate 40) due to the pressure at the time of filling the resin layer 50. 41 side). The filled resin can be prevented from leaking into the slot 25. In this case, if the plate 40 is formed of an elastic member (eg, resin), the stopper portion 27 bites into the plate 40, and more reliable sealing can be performed. Further, the plate 40 is fixed at an appropriate position by being supported by the stopper portion 27.

  The leg portion 42 of the plate 40 is disposed substantially at the center of the slot 25, and functions to reduce the cross-sectional area of the refrigerant passage 29 by its cross-sectional area. Thereby, the refrigerant passage 29 has a narrow cross-sectional area near the coil 30, and the refrigerant (for example, cooling oil) flows through the narrow cross-sectional area near the coil 30, so that efficient cooling can be performed. The amount of cooling oil flowing through the refrigerant passage 29 can be reduced. That is, when compared with the same cooling oil flow rate, when the passage cross-sectional area of the refrigerant passage 29 is reduced, the flow velocity is increased and the cooling efficiency is improved, so that the capacity of the oil circulation pump required to obtain the same cooling effect is obtained. Can be reduced. The extent to which the cross-sectional area of the refrigerant passage 29 is reduced can be adjusted by the width (cross-sectional area) of the leg 42.

  The length of the leg portion 42 is set to a length that allows a gap to be formed between the plate 40 and the bottom portion (the back core portion 22) of the slot 25 even when the plate 40 is pushed into the stopper portion 27 due to the play described above. Is done. This prevents the seal between the inner side surface of the plate 40 and the support surface of the stopper portion 27 from being disturbed.

  However, this gap has such a width that the tip of the leg 42 contacts the bottom of the slot 25 when the plate 40 (the main body 41) is deformed by the filling pressure. Thereby, the deformation of the plate 40 is limited to within a predetermined amount defined by the gap. If the amount of deformation of the plate 40 is limited in this way, it is possible to select a relatively soft (small rigid) material as the material of the plate 40 and set the filling pressure to a relatively high value. Therefore, the adhesion between the inner side surface of the plate 40 and the support surface of the stopper portion 27 is enhanced, and as a result, more reliable sealing can be performed.

  Next, a method of manufacturing the rotating electric machine according to the present embodiment will be described with reference to FIGS.

  First, a substantially T-shaped electromagnetic steel sheet is formed by press working using a mold hole 61 as shown in FIG. As a result, the required number of split cores 21 as shown in FIG. 4 (twelve in the present embodiment) for forming the stator core 5 is formed.

  As shown in FIG. 4, the split core 21 includes an arc-shaped back core portion 22 </ b> A (which constitutes a part of the back core portion 22 of the stator core 20) that protrudes left and right, and is substantially inward from the back core portion 22 </ b> A. And a tooth portion 23 extending at a right angle (to be a tooth portion 23 of the stator core 20). A projection 26, a plate holding groove 28, and a stopper 27 are formed near the tip of the teeth 23 from the tip.

  Next, as shown in FIG. 5, a coil 30 is formed by winding a wire around the teeth 23 (inside the stopper 27) of each split core 21. This coil winding is performed over a predetermined layer with a predetermined number of turns (number of turns).

  In the present embodiment, first, the six-turn winding of the first layer extends the wire without gap from the base end of the teeth portion 23 to the front end in a range from immediately after the back core portion 22A to immediately before the stopper 25. This is done by winding. Subsequently, the first layer is folded back from the end thereof, and five turns of the second layer from the distal end side to the proximal end side of the teeth portion 23 are wound on the first layer wire. Hereinafter, in the same manner, the winding of the third layer of four turns, the winding of the fourth layer of three turns, and the winding of the fifth layer of one turn are sequentially performed. As a result, the teeth 23 of the split core 21 are wound in a total of 20 turns. With the split core structure, such a coil winding operation can be easily performed.

  Next, as shown in FIG. 6, the twelve split cores 21 with the coil 30 wound thereon are arranged in a cylindrical shape inside the case 1, and along the inner peripheral surface of the cylindrical plate 1 </ b> A of the case 1. It is inserted (in FIG. 6, three of the twelve split cores 21 inserted into the case 1 are shown). The attachment to the cylindrical plate 1A is performed by, for example, shrink fitting. By this attachment, the twelve split cores 21 come into close contact with each other on both sides of the back core portion 22A. As a result, the stator 5 having the same function as the integrally structured stator is formed.

  Next, as shown in FIG. 8, the plate 40 (shown in FIG. 7) is mounted on the stator so that both sides of the main body 41 are mounted in the plate holding grooves 28 and the legs 42 are accommodated in the slots 25. 5 from the direction of the rotation axis of the rotor 2 (perpendicular to the plane of FIG. 8). In this case, there is a certain amount of play between the plate 40 and the plate holding groove 28.

  Next, as shown in FIG. 9, the mold 62 is set on the inner peripheral surface 5 </ b> A of the stator 5. Then, a resin is injected and filled at a predetermined pressure into a space 63 defined between the outer surface 43 of the plate 40 (the main body 41) and the mold 62, and the mold 62 is taken out when the resin is cured. Thereby, the resin layer 50 made of the cured resin is formed on the outer surface 43 of the plate 40 (see FIG. 2).

  In this resin filling step, the outer surface 43 of the plate 40 is brought into close contact with the support surface of the stopper portion 27 of the stator 5 by the filling pressure at the time of filling the resin, so that the filled resin does not leak into the slot 25. , A seal is made. In addition, since the resin is filled with a predetermined pressure, the resin spreads to every corner of the space 63, and a good resin layer 50 can be obtained.

  Further, as described above, the resin layer 50 is formed on the outer side surface 43 of the plate 40 which is not removed even after the resin is filled, and no core (die) is used inside the slot 25. Therefore, there is no need to remove the core after the formation of the resin layer 50, and there is no problem such as rolling up of the electromagnetic steel sheet.

  As a method for sealing the resin, a method that does not use the filling pressure may be used. For example, by setting the width W2 of the main body portion 41 of the plate 40 to be slightly larger than the distance W1 (see FIG. 6) of the plate holding groove 28 between the adjacent teeth portions 23, the plate 40 is When the plate 40 is inserted, the side portion of the plate 40 may be substantially in close contact with the bottom of the plate holding groove 28. Such a method is effective when a stator core having an integral structure is used, but when the stator core 20 has a split core structure as in the present embodiment, it is difficult to control the accuracy of the interval W1. Therefore, when the stator core having the split core structure is employed, it is more reliable to bring the plate 40 into close contact with the stopper 27 by the filling pressure as in the present embodiment.

  Further, since the stator core 20 has a structure in which electromagnetic steel sheets are laminated, it is inevitable that some irregularities occur on the side surface (including the support surface of the stopper portion 27). Depending on the degree of the unevenness, it may be considered that even if the main body 41 of the plate 40 is brought into close contact with the side surfaces of the stopper 27 and the teeth 23, the sealing performance cannot be sufficiently secured. In such a case, it is desirable to apply the adhesive to the plate holding groove 28 and the main body of the plate 40 in advance, and then mount the plate 40.

  As described above, according to the present embodiment, the resin layer 50 is formed by filling the outer surface 43 of the plate 40 with the resin, and the plate is formed by the core (gold) provided inside the slot 25. Unlike the resin layer 50, the resin layer 50 serves as a closing member for the opening of the slot 25 together with the resin layer 50 and is not removed even after the resin layer 50 is formed. In the case where the magnetic steel sheet is removed, the electromagnetic steel sheet constituting the stator is not turned up or the stator is damaged. Further, since the resin is filled at a required pressure, the resin spreads to every corner of the space 63 to be filled, and a good resin layer can be obtained. Therefore, it is possible to efficiently manufacture a rotating electric machine that uses the inside of the slot 25 as the refrigerant passage 29, and to enhance the performance of the manufactured rotating electric machine.

  Further, since the plate 40 is provided with the legs 42, the passage cross-sectional area of the refrigerant passage 29 is reduced by the integral of the cross-section of the legs 42, the cooling efficiency is increased, and the required amount of refrigerant can be reduced. it can. Further, in this case, since the leg portion 42 is disposed substantially at the center of the slot 25, the refrigerant passage 29 can be formed near the coil 30 and the cooling efficiency can be increased.

  In addition, the plate 40 pressed by the pressure at the time of filling the resin is supported in close contact with the support surface of the stopper portion 27 on its inner surface, so that the resin is effectively prevented from leaking into the slot 25. it can. Therefore, the performance of the rotating electric machine does not deteriorate due to the leakage of the resin into the slot 25. In this case, if the plate is formed of an elastic member (for example, resin), the stopper portion 27 bites into the plate 40, so that a high degree of adhesion is obtained between the stopper portion 27 and the plate 40, and a more reliable seal is obtained. It can be performed.

  Further, even when the plate 40 is pushed in by the filling pressure, the leg portion 42 does not abut against the bottom portion (the back core portion 22) of the slot 25, and the sealing due to the close contact between the plate 40 and the stopper portion 27 is hindered. Never. On the other hand, when the plate 40 (the main body portion 41) is deformed, the leg portion 42 comes into contact with the bottom of the slot 25, so that the deformation is limited. Therefore, it is possible to set the filling pressure to a relatively high value while making the plate 40 small in rigidity. As a result, it is possible to increase the degree of close contact between the plate and the stopper portion and to perform more reliable sealing. .

  FIG. 10 is a perspective view showing a plate according to another embodiment of the present invention.

  As shown in the figure, in the present embodiment, a plate 45 having only a main body and having no legs is used instead of the plate 40 in the above embodiment. When a relatively hard (high rigidity) material is selected as the material of the plate, it is not necessary to limit the deformation by the legs, so a plate 45 having no legs as shown in FIG. 10 is employed. be able to. When it is necessary to adjust the cross-sectional area of the refrigerant passage 29, a protrusion similar to the leg may be provided at the center of the plate.

  FIG. 11 is a cross-sectional view showing a part of a stator 5 of a rotating electric machine according to still another embodiment of the present invention.

  In the present embodiment, the leg 42 of the plate 40 abuts on the bottom 25A (the back core 22) of the slot 25, and the outer surface of the plate 40 faces the inner surface of the projection 26 (the inside of the slot 25). Surface). That is, in the present embodiment, the plate 40 is supported by the slot bottom 25A by making the leg 42 of the plate 40 contact the slot bottom 25A, and as a result, the outer surface of the plate 40 It is in close contact with the protruding portion 26 so that sealing is performed when the resin is filled. According to such a configuration, it is not necessary to protrude the stopper portion 27 as in the above-described embodiment on the side surface of the tooth portion 23, so that the shape of the tooth portion 23 can be simplified, and punching of the electromagnetic steel plate can be performed. This is advantageous.

  In addition, in order to perform sealing at the time of resin filling with such a configuration, it is necessary to make the dimensional accuracy of each part of the stator core 20 relatively high. For this reason, in the present embodiment, a stator core having an integral structure that easily ensures accuracy is used. However, such a configuration may be applied to the stator core having the divided structure as long as the close contact between the outer surface 43 of the plate 40 and the support surface of the protrusion 27 can be ensured.

FIG. 2 is a cross-sectional view illustrating the rotating electric machine according to the embodiment of the present invention. FIG. 2 is a cross-sectional view showing a part of the XX section of FIG. 1. It is a figure which similarly shows the shape of the press-forming die hole of an electromagnetic steel plate. It is a perspective view showing a split core similarly. It is sectional drawing which shows the state which wound the coil around the division | segmentation core similarly. It is sectional drawing which shows the state which attached the stator core to the case cylindrical part similarly. It is a perspective view showing a plate similarly. It is sectional drawing which shows the state which attached the plate to the stator core similarly. It is sectional drawing which similarly shows formation of a resin layer. It is a perspective view showing a plate in other forms of the present invention. FIG. 13 is a cross-sectional view showing a part of a rotating electric machine according to another embodiment of the present invention.

Explanation of reference numerals

5 Stator 20 Stator core 21 Split core 22 Back core 23 Teeth 25 Slot 26 Projection 27 Stopper 28 Plate holding groove 29 Refrigerant passage 30 Coil 40 Plate 41 Main body 42 Leg 43 Outer side surface

Claims (16)

A stator with a coil housed in the slot,
In a rotating electric machine that forms a refrigerant passage inside a slot by closing an opening of the slot,
A plate disposed near the opening of the slot,
A resin layer formed by filling the resin on the outer surface of the plate,
A rotating electric machine, wherein an opening of the slot is closed by the plate and the resin layer. The rotating electrical machine according to claim 1, wherein the plate includes a leg extending into the slot. The rotating electric machine according to claim 2, wherein the leg is disposed substantially at a center of the slot. A stopper is protruded on the inner peripheral surface of the slot,
2. The rotating electric machine according to claim 1, wherein when the plate is pushed inward of the slot due to the pressure at the time of filling the resin, the plate is supported in close contact with the stopper portion. 3. The rotating electric machine according to claim 4, wherein the plate is formed of an elastic member. The plate has legs extending into the slots,
6. The rotating electric machine according to claim 4, wherein a length of the leg portion is a length that does not abut against a bottom of the slot when the plate is supported in close contact with the stopper portion. 7. The rotating electric machine according to claim 6, wherein when the plate is deformed by the pressure at the time of filling, the leg is in contact with the bottom of the slot to suppress the deformation. While having a projection outside the plate near the opening of the slot,
The plate has a leg extending into the slot;
2. The rotating electric machine according to claim 1, wherein the outer surface of the plate is in close contact with the inner surface of the projection by contacting the leg with the bottom of the slot. 3. 9. The resin according to claim 4, wherein an adhesive is applied to a gap between the plate and the inner peripheral surface of the slot, and then the resin is filled. Rotary electric machine. In a method for manufacturing a rotating electric machine that forms a refrigerant passage inside a slot by closing a slot opening of a stator,
A method for manufacturing a rotating electrical machine, comprising: disposing a plate inside the slot opening, filling the outer surface of the plate with a resin, and closing the slot opening. When the plate is pushed inward of the slot due to the pressure at the time of filling the resin, the plate is tightly supported by the stopper portion protruding from the inner peripheral surface of the slot. A method for manufacturing a rotating electric machine according to claim 10. The method according to claim 11, wherein the plate is formed of an elastic member. The plate has legs extending into the slots,
13. The rotary electric machine according to claim 11, wherein the length of the leg is such that the plate does not contact the bottom of the slot when the plate is supported in close contact with the stopper. Production method. 14. The method according to claim 13, wherein, when the plate is deformed by the pressure at the time of filling, the leg is in contact with the bottom of the slot to suppress the deformation. While having a projection outside the plate near the opening of the slot,
11. The plate according to claim 10, further comprising a leg extending into the slot, wherein the leg contacts the bottom of the slot so that the outer surface of the plate is in close contact with the inner surface of the protrusion. 3. The method for manufacturing a rotating electric machine according to claim 1. 16. The method according to claim 10, wherein an adhesive is applied to a gap between the plate and the inner peripheral surface of the slot, and then the resin is filled. Method of manufacturing a rotating electric machine.

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