JP5470768B2 - Rotating electric machine and manufacturing method thereof - Google Patents

Description

  The present invention relates to a rotating electrical machine such as an AC servo motor, and more particularly to cooling of a stator coil.

In the rotating electrical machine, the temperature of the stator coil rises due to heat loss due to driving, and the temperature of the rotating electrical machine rises. Particularly in an AC servo motor or the like, since a rotation detector such as an encoder provided on the non-load side of the motor is weak in temperature, it is necessary to suppress the temperature rise of the rotating electrical machine as much as possible.
Therefore, in conventional rotating electrical machines, for example, the heat generated by the stator coil mounted on the stator core is effectively radiated through the load-side bracket, and the cooling effect is improved. It is possible to increase the rated output by enabling greater energization with respect to the temperature (see, for example, Patent Document 1).
FIG. 21 is a side sectional view showing the rotating electrical machine in the first prior art, and FIG. 22 is a front sectional view of the rotating electrical machine in FIG. These are shown in Patent Document 1.
In the rotating electrical machine according to the first prior art, the load-side coil end 111e of the stator coil 111 made of a plate-shaped conductor mounted on the stator core 112 is formed on the inner cylindrical surface and the outer peripheral surface on one cylindrical surface. In addition, the end surface is formed on a single plane so as to be in close contact with the groove 115e of the load side bracket 115. As a result, the heat generated in the stator coil 111 can be effectively dissipated through the load-side bracket 115 to improve the cooling effect, and more energization can be performed with respect to the allowable temperature of the stator coil 111. Thus, the rated output can be improved.
21 and 22, 112 c is a teeth portion of the stator core, 113 is a first insulator, 114 is a second insulator, 116 is an anti-load side bracket, 117 is a stator coil connection portion, and 118 is a rotation. A position detection unit, 119 is a load side bearing, 120 is an anti-load side bearing, 121 is a permanent magnet, 122 is a protective tape, 123 is a rotor core, and 124 is a rotating shaft.

  In the rotating electrical machine according to the second prior art, the heat generated in the stator coil is made of a material having high thermal conductivity (for example, see Patent Document 2), a radioactive coating (for example, see Patent Document 3), ceramic ( For example, the heat transfer is effectively performed through Patent Document 4) to improve the cooling effect. Thereby, larger energization is possible with respect to the allowable temperature of the stator coil, and the rated output is improved.

FIG. 23 is a side sectional view showing the rotating electrical machine in the second prior art, which is shown in Patent Document 2. As shown in FIG.
In the rotating electrical machine according to the second prior art, the stator core 142 that is in close contact with the inside of the frame 141, the coil end 143 e of the stator coil 143 wound around the stator core 142, and the frame 141 are heated. The conductor 149 is filled and fixed, and the heat conductor 149 is formed of a thermosetting resin mixed with ceramic powder. Thereby, since high thermal conductivity can be obtained, heat generated in the stator coil 143 can be transferred from the coil end 143e to the frame 141 via the thermal conductor 149, and the cooling effect can be improved. In FIG. 23, 144 is a bracket, 145 is a bearing, 146 is a rotating shaft, 147 is a rotor, 147a is a permanent magnet, 147b is a yoke, 147c is a sleeve, 148 is a plate, and 150 is a coolant passage.

FIG. 24 is a cross-sectional view showing a part of a stator coil of a rotating electrical machine in the third prior art, which is shown in Patent Document 3.
In the rotating electrical machine according to the third prior art, a normal magnet wire having an enamel layer 152 outside the conductor 151 is wound and cured by a varnish 153, and then ceramic far infrared rays are applied to the coil end portion of the stator coil. Alternatively, a far-infrared radiation coating 154 is applied to improve heat radiation from the windings and improve the cooling effect of the rotating electrical machine.

FIG. 25 is a side sectional view showing a rotating electrical machine in the fourth prior art, which is shown in Patent Document 4. In FIG.
In the rotating electrical machine according to the fourth prior art, a ceramic which is a ring-shaped heat conductor 169 is inserted between the coil end 163e of the stator coil 163 wound around the stator core 162 and the frame 161, and A thermosetting resin 170 is filled and fixed between the coil end 163e and the heat conductor 169. As a result, heat generated in the stator coil 163 can be transferred from the coil end 163e to the frame 161 via the ceramic that is the heat conductor 169, thereby improving the cooling effect and reducing the allowable temperature of the stator coil 163. Therefore, the rated output can be improved by enabling larger energization.
JP 2006-50853 A (FIGS. 1 and 2) JP 2002-191149 A (FIG. 1) JP-A-7-107690 (FIG. 1) JP 2002-191155 A (FIG. 1)

However, such a conventional technique has the following problems.
(1) The rotating electrical machine according to the first prior art effectively dissipates the heat generated in the stator coil through the load side bracket and improves the cooling effect. It is expensive because it uses a stator coil produced by punching with a press.

(2) The rotating electrical machine according to the second conventional technique effectively dissipates heat and improves the cooling effect via the thermosetting resin mixed with the ceramic powder, but the heat conduction of the thermosetting resin Since the property is still small, there is a limit to improving the cooling effect.

(3) Since the winding of the rotating electrical machine in the third prior art radiates heat from the heat radiation coating into the rotating electrical machine, the effect is small compared to the cooling effect by heat conduction.

(4) The rotating electrical machine according to the fourth prior art effectively dissipates heat through the ceramic, which is a heat conductor, and improves the cooling effect. However, there is an uneven space due to the winding on the surface of the coil end. As a result, the coil end and the frame are not sufficiently adhered to each other, and a ceramic space as a heat conductor is required at the coil end, and the rotating electrical machine cannot be reduced in size.

  The present invention has been made in view of such problems, and is inexpensive, can be downsized while ensuring insulation performance, effectively dissipates heat generated in the stator coil, and has a cooling effect. It is an object of the present invention to provide a rotating electrical machine that can improve the rated output by improving the rated temperature and allowing larger energization with respect to the allowable temperature of the stator coil.

In order to solve the above problems, the present invention is configured as follows.
The invention of the rotating electrical machine according to claim 1 is characterized in that a cylindrical frame, a stator core fitted and fixed to an inner peripheral surface of the frame, a load side coil end and an anti-load side coil end are the stator core. A stator provided with a stator coil comprising windings mounted on the stator core so as to protrude from both end faces in the rotation axis direction of the rotor, and provided on the load side of the frame, the load side coil end A load-side bracket in which a groove is inserted, wherein at least one of the inner peripheral surface, the outer peripheral surface, and the end surface of the load-side coil end including the end surface is made of an insulator without a gap. Via the load side bracket closely attached to the inner surface of the groove, the anti load side bracket provided on the anti load side of the frame, the load side bracket and the anti load side bracket, the load side bearing and the anti negative A rotary shaft that is rotatably supported via a side bearing, and a rotor that is attached to the outer peripheral surface of the rotary shaft, and the shape of the one or more surfaces is the same as the shape of the inner surface of the groove to be in close contact with each other The outer surface of the load side coil end is pressed and molded so as to have a shape, and after molding resin or varnish is put in the groove of the load side bracket, the end surface of the load side coil end is attached to the load side bracket. The stator and the load side bracket are integrated with mold resin or varnish while being inserted into the groove and pressed against the load side coil end so as to be in close contact with the groove of the load side bracket. .

  According to a second aspect of the present invention, the load-side bracket is made of an aluminum alloy, and a ceramic coating is formed on the inner surface of the groove of the load-side bracket. It is.

  According to a third aspect of the present invention, the stator iron core has a plurality of teeth portions forming slots in the inner peripheral portion, and the inner side of the teeth portions is more axial than the teeth portions. A stator coil that is long is attached to the base plate.

  According to a fourth aspect of the present invention, the stator iron core has an inner peripheral surface that does not form a slot in the inner peripheral portion, and a stator coil via a ceramic coating on the inner peripheral surface. It is characterized by mounting.

  The invention of the rotating electrical machine according to claim 5 is characterized in that the ceramic coating is formed on a portion of the inner peripheral surface of the stator core that contacts the stator coil. .

According to a seventh aspect of the present invention, there is provided a rotating electric machine comprising: a cylindrical frame; a stator core fitted and fixed to an inner peripheral surface of the frame; and a load-side coil end and an anti-load-side coil end. A stator having a stator coil composed of windings mounted on the stator core so as to protrude from both end surfaces of the rotation axis direction of the frame, and provided on the load side of the frame, A load-side bracket in which a groove to be inserted is formed, and at least one of the inner peripheral surface, outer peripheral surface, and end surface of the load-side coil end including the end surface is interposed via an insulator without a gap. A load side bracket closely attached to the inner surface of the groove, an antiload side bracket provided on the antiload side of the frame, a load side bearing and an antiload side on the load side bracket and the antiload side bracket A rotary shaft supported rotatably via a receiver, and a rotor attached to the outer peripheral surface of the rotary shaft, the load-side bracket is made of ceramic, and has a shape of one or more surfaces, After pressing and molding the outer surface of the load side coil end so as to have the same shape as that of the inner surface of the groove to be in close contact, and then putting mold resin or varnish into the groove of the load side bracket, the load side coil The end face of the end is inserted into the groove of the load side bracket, and the stator and the load side bracket are molded with the load side coil end pressed against the groove of the load side bracket. Integrated with resin or varnish .

According to an eighth aspect of the present invention, at least one of the stator coil including the end surface, the inner surface, the outer surface, and the end surface of the load-side coil end matches the shape of the groove. It is characterized by being molded.

The invention of the method for manufacturing a rotating electrical machine according to claim 9 includes a cylindrical frame, a stator core fitted and fixed to an inner peripheral surface of the frame, and a load-side coil end having a rotating shaft of the stator core. A stator having a stator coil composed of windings mounted on the stator core so as to protrude from both end faces in the direction, a load-side bracket provided on the load side of the frame, and a reaction of the frame An anti-load side bracket provided on the load side, a rotary shaft rotatably supported by the load side bracket and the anti-load side bracket via the load side bearing and the anti-load side bearing, and an outer periphery of the rotary shaft In the manufacturing method of a rotating electrical machine comprising a rotor attached to a surface, an inner peripheral surface and an outer peripheral surface of the load side coil end are disposed on a portion of the inner surface of the load side bracket facing the load side coil end. And at least one of the end surfaces including the end surface is formed with a groove that closely contacts, and the shape of the one or more surfaces is the same as the shape of the inner surface of the groove that closely contacts. Pressurize and mold the outer surface, put mold resin or varnish into the groove of the load side bracket, insert the end surface of the load side coil end into the groove of the load side bracket, The stator and the load side bracket are integrated with a mold resin or varnish while being pressed so as to be in close contact with the groove of the load side bracket .

According to a tenth aspect of the present invention, there is provided a method of manufacturing a rotating electrical machine, wherein the stator core has an inner peripheral surface that does not form a slot in an inner peripheral portion, and a stator coil on the inner peripheral surface is mounted. A ceramic coating is thermally sprayed on the portion to be fixed, the stator coil is brought into close contact, the end surface of the load side coil end is inserted into the groove of the load side bracket, and the load side coil end is inserted into the load side bracket. The stator and the load side bracket are integrated with a mold resin or a varnish while being pressed so as to be in close contact with the groove.

The invention of the method for manufacturing a rotating electrical machine according to claim 11 is characterized in that the load side bracket is made of an aluminum alloy, and a ceramic coating is formed on the inner surface of the groove of the load side bracket by thermal spraying. To do.

The invention of the method for manufacturing a rotating electrical machine according to claim 12 is characterized in that the load side bracket is made of ceramic.

The present invention has the following effects.
(1) to the inner surface of the ring-shaped groove provided on the load side bracket above, forming a high thermal conductivity ceramic coating Then, the thickness of the ceramic coating, a slight space, and the load side coil end Insulation performance with the load side bracket can be sufficiently secured, and the rotating electrical machine can be downsized.
The load side coil end is inserted into the groove of the load side bracket, and at least one of the inner peripheral surface, the outer peripheral surface, and the end surface of the load side coil end including the end surface is made of the ceramic. When through a film Ru is adhered to the inner surface of the groove, the heat generated in the stator coil, it is possible to effectively heat transfer to the load-side bracket in contact with the outside air or mounting apparatus main body, to quickly rotating electric machine external heat Thus, the cooling effect of the rotating electrical machine can be improved. As a result, it is possible to provide a rotating electrical machine capable of energizing more with respect to the allowable temperature of the stator coil and significantly improving the rated output.

(2) According to the invention of the rotating electrical machine according to claim 2, by making the load side bracket made of an aluminum alloy, the bondability between the load side bracket and the ceramic film having high thermal conductivity is increased. The contact thermal resistance can be reduced. As a result, the heat generated in the stator coil can be more effectively transferred to the load side bracket, and can be quickly radiated to the outside of the rotating electrical machine to greatly improve the cooling effect of the rotating electrical machine. Therefore, it is possible to provide a rotating electrical machine that allows greater energization with respect to the allowable temperature of the stator coil and that significantly improves the rated output.

(3) According to the invention of the rotating electrical machine according to claim 3, the stator iron core has a plurality of teeth portions forming slots on the inner peripheral portion, and the inside of the teeth portion is more than the teeth portion. Since the stator coil formed long in the axial direction is mounted, a space is formed between the inside of the stator coil and the teeth portion, the stator core is fixed to the frame, and the frame is loaded. Even after fixing to the side bracket or after fixing the frame and the stator core to the load side bracket, the stator coil can be moved in the axial direction. Thereby, after fixing the stator core to the load side bracket, the stator moves the stator coil in the axial direction so that the end surface of the load side coil end is brought into close contact with the groove of the load side bracket. The stator and the load-side bracket can be integrated with a mold resin or varnish while being pressed against the heat, and the heat generated in the stator coil is effective for the load-side bracket in contact with the outside air or the device main body to be attached. Heat can be transferred to the outside, and heat can be quickly radiated to the outside of the rotating electrical machine to improve the cooling effect of the rotating electrical machine. Therefore, it is possible to provide a rotating electrical machine that allows greater energization with respect to the allowable temperature of the stator coil and that significantly improves the rated output.

  According to the rotary electric machine of the present invention, the heat generated in the stator coil can be effectively transferred from the load side coil end to the outside air or the load side bracket in contact with the apparatus main body to be attached. In addition, heat is effectively transferred to the frame through the ceramic coating with high thermal conductivity from the stator core that is transferred from the stator coil. The cooling effect of the rotating electrical machine can be improved. Therefore, it is possible to provide a rotating electrical machine that allows greater energization with respect to the allowable temperature of the stator coil and that significantly improves the rated output.

When the load-side bracket and ceramic, as well as high insulation performance, it is possible to increase the thermal conductivity, skip insulator take up space, between the load-side bracket and the load-side coil end Insulation performance can be ensured. As a result, the rotating electrical machine can be reduced in size, and the heat generated in the stator coil can be effectively transferred to the load side bracket in contact with the outside air or the device main body to be attached, and the rotating electrical machine can be quickly The cooling effect of the rotating electric machine can be improved by radiating heat to the outside. Therefore, it is possible to provide a rotating electrical machine that allows greater energization with respect to the allowable temperature of the stator coil and that significantly improves the rated output.

  According to the rotating electrical machine of the seventh aspect of the invention, the stator coil is formed of one or more surfaces including at least the end surface among the inner peripheral surface, the outer peripheral surface, and the end surface of the load side coil end. Since it is manufactured by a round wire or a rectangular wire, it is extremely inexpensive. Further, the stator can be integrated with the mold resin or varnish while the end surface of the load side coil end is pressed against the groove of the load side bracket so that the stator and the load side bracket are in close contact with each other. The heat generated in the stator coil can be effectively transferred to the load side bracket in contact with the outside air or the apparatus main body to be attached, and quickly radiates heat to the outside of the rotating electrical machine to improve the cooling effect of the rotating electrical machine. be able to. Therefore, it is possible to provide a rotating electrical machine that allows greater energization with respect to the allowable temperature of the stator coil and that significantly improves the rated output.

The groove of the load-side bracket, or configured to form a ceramic coating, or the load-side bracket made of ceramic Then, the stator, so as to contact the end face of the load-side coil end in the groove of the load-side bracket By integrating the stator and the load-side bracket with a mold resin or varnish while being pressed against each other, high heat transfer can be obtained effectively and reliably, and high insulation is achieved. Can be obtained.

  According to the rotating electrical machine of the tenth aspect, since the molding resin or varnish is put between the load side coil end and the groove of the load side bracket, the gap between the load side coil end and the groove of the load side bracket is inserted. In addition, the mold resin or varnish can be reliably filled, and the insulation performance between the phases of the stator coil can be ensured.

  According to the invention of the manufacturing method of a rotating electrical machine according to claim 11, since the ceramic coating is formed on the inner peripheral surface of the stator core by thermal spraying, the position accuracy of the coating formation can be improved, The thickness of the film can be varied with very little fluctuation, and a stable coating can be formed, and insulation and heat transfer can be improved.

  According to the invention of the rotating electrical machine manufacturing method according to claim 12, since the load side bracket is made of an aluminum alloy and the ceramic coating is formed by thermal spraying, the bondability between the load side bracket and the ceramic coating is improved. The contact thermal resistance can be reduced. As a result, heat generated in the stator coil can be effectively transferred to the load-side bracket in contact with the outside air or the apparatus main body to be attached, and heat can be quickly dissipated to the outside of the rotating electrical machine to effectively cool the rotating electrical machine. Can be improved. Therefore, it is possible to provide a rotating electrical machine that allows greater energization with respect to the allowable temperature of the stator coil and that significantly improves the rated output.

The inner peripheral surface of the load-side coil end of the stator coil made winding peripheral surface, and out of the end surface, over one surface including at least the end face, when molded according to the shape of the groove formed on the load side bracket, Of the inner peripheral surface, outer peripheral surface, and end surface of the load side coil end, the degree of adhesion between at least one surface including the end surface and the inner surface of the groove of the load side bracket can be increased. Thereby, the heat transfer from the load side coil end to the load side bracket can be further improved.

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

FIG. 1 is an exploded perspective view showing a rotating electrical machine according to a first embodiment of the present invention.
In FIG. 1, the rotating electrical machine 1 includes a frame 5, a counter load side bracket 7, a stator 4 having a stator coil 12, and a load side bracket 6. The cylindrical rotor 3 having the rotating shaft 2 shown in FIG. 2 is not shown.
The load side coil end 12a of the stator coil 12 has an inner peripheral surface 12aa and an outer peripheral surface 12ab formed on one cylindrical surface, and an end surface 12ac formed on one flat surface. The load side bracket 6 has a concave groove 6a that is in close contact with the load side coil end 12a, an inner peripheral surface 12aa, an outer peripheral surface 12ab, and an end surface 12ac of the load side coil end 12a. A ceramic coating 6b is formed. In the assembled state of the rotating electrical machine 1, the stator 4 molds the stator 4 and the load side bracket 6 with the end surface 12ac of the load side coil end 12a pressed against the groove 6a. The resin 14 is integrated.
While the stator 4 is pressed against the groove 6a so that the end surface 12ac of the load side coil end 12a is in close contact with the ceramic film 6b having high thermal conductivity, the stator 4 and the The load side bracket 6 is integrated with the mold resin 14. Therefore, the heat generated in the stator coil 12 is effectively dissipated, the cooling effect is improved, the energization can be made larger with respect to the allowable temperature of the stator coil 12, and the rated output is greatly improved. be able to.

FIG. 2 is a sectional side view showing the rotating electrical machine.
In FIG. 2, the rotating electrical machine 1 is an embedded magnet type synchronous motor, and includes a cylindrical rotor 3 having a rotating shaft 2 and a stator 4, and the stator 4 is held on the inner periphery of a frame 5. The frame 5 is fastened to the load side bracket 6 installed on the load side together with the non-load side bracket 7 with bolts (not shown) and assembled. The rotor 3 is rotatably held by the load-side bracket 6 and the anti-load-side bracket 7 via a load-side bearing 8 and an anti-load-side bearing 9 installed on the rotary shaft 2, and the rotary shaft An encoder unit 10 for detecting the rotational position is installed on the side opposite to the load 2.
The stator 4 is attached to the teeth portion 11a of the stator core 11 by insulating paper 16 being attached to the stator core 11, wound with distributed winding with an insulating film, and then attached to the teeth portion 11a. As the stator coil 12, the load side coil end 12a of the stator coil 12 has an inner peripheral surface 12aa and an outer peripheral surface 12ab formed on one cylindrical surface, and an end surface 12ac formed on one flat surface. The non-load side coil end 12b of the stator coil 12 is connected at a nearby connection portion 13. The load-side bracket 6 has a groove 6a that is in close contact with the load-side coil end 12a and an inner peripheral surface 12aa, an outer peripheral surface 12ab, and an end surface 12ac of the load-side coil end 12a. The coating 6b is formed. In the stator 4, the stator 4 and the load side bracket 6 are integrated with a mold resin 14 while the end surface 12ac of the load side coil end 12 a is pressed against the groove 6 a.
While the stator 4 is pressed against the groove 6a so that the end surface 12ac of the load side coil end 12a is in close contact with the ceramic film 6b having high thermal conductivity, the stator 4 and the The load side bracket 6 is integrated with the mold resin 14. Therefore, the heat generated in the stator coil 12 is effectively radiated.

FIG. 3 is a front sectional view showing the rotating electric machine.
In FIG. 3, a cylindrical rotor 3 having a rotating shaft 2 is an embedded magnet type rotor in which a permanent magnet 15 is embedded in the rotor 3. The stator 4 is insulated by attaching insulating paper 16 to the teeth 11a of the stator core 11, wound with distributed winding with an insulating coating, and then attached to the teeth 11a and fixed. A child coil 12 is held on the inner periphery of the frame 5.

FIG. 4 is an enlarged cross-sectional view showing the load side coil end of the rotating electrical machine.
In FIG. 4, the ceramic coating 6 b is formed on the entire groove 6 a to ensure the insulation performance between the load side coil end 12 a and the load side bracket 6. The thickness of the ceramic coating 6b is the minimum thickness that can ensure the insulation performance. Here, it is 0.3 to 0.5 mm.
Since the ceramic film 6b is formed in the groove 6a, the insulation performance between the load side coil end 12a and the load side bracket 6 is increased depending on the thickness of the ceramic film 6b. While securing the rotary electric machine, the stator 4 can be miniaturized, and the stator 4 closely contacts the end surface 12ac of the load side coil end 12a to the groove 6a through the ceramic coating 6b having high thermal conductivity. In this manner, the stator 4 and the load side bracket 6 are integrated with the mold resin 14 while being pressed. Therefore, the heat generated in the stator coil 12 is effectively dissipated, the cooling effect is improved, the energization can be made larger with respect to the allowable temperature of the stator coil 12, and the rated output is greatly improved. be able to.

FIG. 5 is an enlarged cross-sectional view showing a state in which the stator coil and the load side bracket are in close contact with each other in the rotating electric machine.
The stator 4 and the load side bracket 6 are integrated with the mold resin 14 while the end surface 12ac of the load side coil end 12a is pressed against the groove 6a. In FIG. 5, 12aa indicates the inner peripheral surface of the load side coil end 12a.
In FIG. 5, the load side coil end 12a is pressed to form an outer shape, so that a planar shape with less unevenness can be formed. However, since the winding is wound, some unevenness is generated. Therefore, a concave and convex space 12c is formed between the load side coil end 12a and the groove 6a, and along the groove 6a, There is a risk of creeping discharge occurring between the phases of the stator coil 12 and short-circuiting. Therefore, the stator 4 can fill the space 12c with the mold resin 14 by integrating the stator 4 and the load side bracket 6 with the mold resin 14, and creeping discharge is generated between the phases. The possibility of a short circuit occurring is reduced, and the insulation performance between the phases of the stator coil 12 can be ensured.
In the first embodiment, a round wire is used as the coil. However, even when a flat wire is used, some unevenness occurs due to the angle R of the flat wire. For a low-voltage rotating electrical machine, there is no problem even if the stator 4 and the load side bracket 6 are integrated with the mold resin 14 or the varnish by using only the insulating film of the coil to leave the space.
The rotating electric machine according to the first embodiment of the present invention is different from the prior art in that a ceramic film is formed in the groove 6 a of the load side bracket 6.

FIG. 6 is an explanatory view showing a method for manufacturing the load side bracket of the rotating electrical machine.
In FIG. 6, the load-side bracket 6 is made of an aluminum alloy, and the load-side bracket 6 includes an inner peripheral surface 12aa, an outer peripheral surface 12ab, and an end surface 12ac of the load-side coil end 12a and the load-side coil end 12a. The groove 6a is in close contact, and a ceramic coating 6b is formed in the groove 6a. The ceramic coating 6 b is formed on the entire groove 6 a by thermal spraying with the thermal spray nozzle 17.
The ceramic type is preferably alumina or aluminum nitride. The ceramic coating 6b has high insulation performance and high thermal conductivity. Further, since the ceramic coating 6b is formed by thermal spraying, it is possible to increase the bondability between the load side bracket 6 and the ceramic coating 6b, and to reduce the contact thermal resistance. The heat generated in the stator coil 12 can be effectively radiated.

FIG. 7 is a diagram illustrating a method for manufacturing the stator of the rotating electrical machine, where (a) is the stator 4 before molding, and (b) is the stator 4 after molding.
In FIG. 7, the stator 4 is subjected to insulation treatment by attaching an insulating paper 16 to the teeth portion 11a of the stator core 11, and after winding a winding having an insulating film with distributed winding, the teeth portion 11a. To be a stator coil 12. The load side coil end 12a of the stator coil 12 is pressed with a forming jig 18 to have an outer shape, the inner peripheral surface 12aa and the outer peripheral surface 12ab are each formed on one cylindrical surface, and the end surface 12ac is one flat surface. Formed on top.
Since the stator coil 12 is manufactured by a round wire that is a general winding, the stator coil 12 is inexpensive. Since the load side coil end 12a is pressed by the forming jig 18 to form an outer shape, a planar shape with less unevenness is formed, and the outer shape is finished with high accuracy. Therefore, the load side coil end 12a can be formed in a planar shape with less unevenness.
Since the heat generated in the stator coil 12 is radiated through the load side bracket, the anti-load side coil end 12b is not molded in the outer shape.

FIG. 8 is an explanatory view showing a method of manufacturing the stator of the rotating electrical machine.
In FIG. 8, after the mold resin 14 is put into the groove 6a, the stator 4 is further pressed while the end surface 12ac of the load side coil end 12a is pressed against the groove 6a. The child 4 and the load side bracket 6 are integrated by the mold resin 14.
The load side coil end 12a is formed so that the protruding length from the stator core 11 is the same as or longer than the axial length of the groove 6a, and the end surface 12ac of the load side coil end 12a is formed on the groove 6a. The end face 12ac of the coil end 12a can be brought into close contact with the groove 6a. Furthermore, since the load side coil end 12a is pressed with a mold to form an outer shape, the inner peripheral surface 12aa and the outer peripheral surface 12ab of the load side coil end 12a are formed on one cylindrical surface, respectively. 12ac is formed on one plane, and the inner peripheral surface 12aa and the outer peripheral surface 12ab of the load side coil end 12a can be brought into close contact with the groove 6a. The load side coil end 12a and the groove 6a are in close contact with at least one of the inner peripheral surface 12aa, the outer peripheral surface 12ab, and the end surface 12ac of the load side coil end 12a including at least the end surface 12ac. Also good.
In the conventional rotating electrical machine, the stator 4 and the load-side bracket 6 are integrated with the mold resin 14, and the concave and convex space formed by the winding between the load-side coil end 12 a and the groove 6 a. The mold resin 14 is filled and integrated. However, the space has a small gap, and care must be taken to fill the mold resin 14. Furthermore, when heat conductor powder or the like is mixed into the mold resin 14, the viscosity increases, and when the stator 4 and the load side bracket 6 are integrated with the mold resin 14, the whole resin is injected. There are cases where it is not possible. In the first embodiment, after the mold resin 14 is put in the groove 6a, the end surface 12ac of the load side coil end 12a is pressed so as to be in close contact with the groove 6a. 14 can be reliably filled, and there is less risk of occurrence of creeping discharge between the phases of the stator coil 12 and short circuit, and insulation between the phases of the stator coil 12 can be ensured.
The stator 4 is fastened to the outer periphery of the stator 4 with bolts (not shown) while pressing the end surface 12ac of the load side coil end 12a so as to be in close contact with the groove 6a. Since it is assembled, the frame 5 can be brought into close contact with the load side bracket 6 while the end surface 12ac of the load side coil end 12a is pressed against the groove 6a. The generated heat is effectively radiated from the bracket 6 through the load side coil end 12a, and the heat generated in the stator coil 12 is effectively radiated from the bracket 6 through the stator core 11 and the frame 5. Can dissipate heat.

FIG. 9 is a flowchart showing a processing procedure for manufacturing the stator described above.
The part of the rotating electrical machine manufacturing method of the first embodiment of the present invention different from the prior art is that the end surface 12ac of the load side coil end 12a is pressed against the groove 6a and the groove 6a is pressed against the groove 6a. After the mold resin 14 is inserted, the stator 4 and the load side bracket 6 are integrated with the mold resin 14 while the end surface 12ac of the load side coil end 12a is pressed against the groove 6a. It is a part that has become.

FIG. 10 is an enlarged cross-sectional view of a load side coil end portion showing a rotating electrical machine in the second embodiment of the present invention.
In FIG. 10, the stator 24 is attached to the tooth portion 31a of the stator core 31 with an insulating paper 36 for insulation treatment, and after winding a winding having an insulating film with distributed winding, the stator portion 31a is wound on the tooth portion 31a. The stator coil 32 is mounted as a stator coil, and the load side coil end 32a of the stator coil 32 has an inner peripheral surface 32aa and an outer peripheral surface 32ab formed on one cylindrical surface, and an end surface 32ac formed on one flat surface. The load side bracket 26 is made of ceramic and has the load side coil end 32a and an inner peripheral surface 32aa, an outer peripheral surface 32ab of the load side coil end 32a, and a groove 26a that is in close contact with the end surface 32ac. The stator 24 is formed by integrating the stator 24 and the load-side bracket 26 with a mold resin 34 while pressing the end surface 32ac of the load-side coil end 32a in close contact with the groove 26a.
The load side bracket 26 is made of ceramic and has high insulation performance and high thermal conductivity. Therefore, the insulation is omitted and the insulation performance between the load side coil end 32a and the groove 6a is omitted. The stator 24 can be downsized while the end face 32ac of the load side coil end 32a is pressed against the groove 26a while the rotary electric machine is downsized. The side bracket 26 can be integrated with the mold resin 34, and the heat generated in the stator coil 32 can be effectively dissipated to improve the cooling effect, with respect to the allowable temperature of the stator coil 32. Therefore, it is possible to provide a rotating electrical machine that can greatly energize and greatly improve the rated output.
The portion of the rotating electric machine according to the second embodiment of the present invention that is different from the prior art is a portion in which the load side bracket is made of ceramic.

FIG. 11 is a side sectional view showing a rotating electrical machine in the third embodiment of the present invention.
In FIG. 11, a rotating electrical machine 41 is a surface magnet type synchronous motor without a slot in a stator core 51, and includes a cylindrical rotor 43 having a rotating shaft 42 and a stator 44. The load side bracket 46 is held together with an anti-load side bracket 47 by bolts (not shown) and assembled together with an inner periphery of a load side bracket 46 installed on the load side integrated with the frame. The rotor 43 is rotatably held by the load-side bracket 46 and the anti-load-side bracket 47 via a load-side bearing 48 and an anti-load-side bearing 49 installed on the rotary shaft 42. On the opposite load side, an encoder unit 50 for detecting the rotational position is installed.
The stator 44 is wound with a winding having an insulating film, and then pressed with a mold to form an outer shape, and the bonded air core coil is attached to the inner periphery of the stator core 51 having no slots. Thus, the stator coil 52 has a load side coil end 52a having an inner peripheral surface 52aa and an outer peripheral surface 52ab formed on one cylindrical surface, and an end surface 52ac formed on one flat surface. The non-load side coil end 52b of the stator coil 52 is connected at a nearby connection portion 53. The load side bracket 46 includes the load side coil end 52a, an inner peripheral surface 52aa of the load side coil end 52a, an outer peripheral surface 52ab, and a groove 46a that is in close contact with the end surface 52ac. The groove 46a and the stator A ceramic coating 46 b is formed on a portion 51 b of the iron core 51 that contacts the stator coil 52. The stator 44 is formed by integrating the stator 44 and the load side bracket 46 with the mold resin 54 while pressing the end surface 52ac of the load side coil end 52a in close contact with the groove 46a. . Therefore, the heat generated in the stator coil 52 is effectively dissipated, the cooling effect is improved, the energization is greater with respect to the allowable temperature of the stator coil, and the rated output can be significantly improved. it can.

FIG. 12 is a radial side sectional view showing the rotating electrical machine.
In FIG. 12, a cylindrical rotor 43 having a rotation shaft 42 is a surface magnet type rotor in which a permanent magnet 55 is mounted outside the rotor 43. The stator 44 is formed by winding a winding having an insulating film, pressurizing with a mold to form an outer shape, and attaching the bonded air core coil to the inner periphery of the stator core 51. The coil 52 is held on the inner periphery of the load side bracket 46 in which the frame is integrated.

FIG. 13 is an enlarged view showing the load side coil end 52a in the side sectional view showing the rotating electrical machine.
In FIG. 13, the ceramic coating 46b is formed over the groove 46a and the entire portion 51b of the core 51 where the stator coil 52 is in contact with the load side coil end 52a and the load side. The insulation performance between the bracket 46 and the stator core 51 is ensured. The thickness of the ceramic coating 46b is set to a minimum thickness that can ensure insulation performance. Here, it is 0.3 to 0.5 mm.
Depending on the thickness of the ceramic coating 46b of the groove 46a and the portion 51b of the stator core 51 where the stator coil 52 contacts, the stator coil 52, the load side bracket 46, and the stator The rotary electric machine can be reduced in size while ensuring the insulation performance with the iron core 51, and the stator 44 is connected to the end surface of the load side coil end 52a via the ceramic coating 46b having high thermal conductivity. The stator 44 and the load side bracket 46 can be integrated with the mold resin 54 while pressing the 52ac in close contact with the groove 46a, and heat generated in the stator coil 52 can be generated. Effectively dissipating heat, improving the cooling effect, enabling greater energization with respect to the allowable temperature of the stator coil, and dramatically improving the rated output It can be.
The part of the third embodiment of the present invention in which the rotating electrical machine is different from the prior art is a rotating electrical machine in which a ceramic coating is formed on the portion of the stator core that contacts the stator coil.

FIG. 14 is an explanatory view showing a method for manufacturing the stator of the rotating electrical machine.
In FIG. 14, the stator iron core 51 is held on the inner periphery of the load side bracket 46 with an integrated frame, and is fastened and assembled together with the load side bracket 46 with bolts (not shown). The load side bracket 46 includes the load side coil end 52a, an inner peripheral surface 52aa of the load side coil end 52a, an outer peripheral surface 52ab, and a groove 46a that is in close contact with the end surface 52ac. The groove 46a and the stator A ceramic coating 46 b is formed on a portion 51 b of the iron core 51 that contacts the stator coil 52. The ceramic coating 46 b is formed on the entire portion 51 b contacting the stator coil 52 by thermal spraying with the thermal spray nozzle 57.
The stator core 51 is fastened with bolts (not shown) to the load side bracket 46 in which the ceramic film 46b is formed in the groove 46a, and is in contact with the stator coil 52 of the stator core 51. A coating 46b made of ceramic is sprayed on the portion 51b. The stator core 51 is held on the inner periphery of the load side bracket 46, and a ceramic coating 46b is thermally sprayed on a portion 51b of the stator core 51 that contacts the stator coil 52, thereby performing an insulation treatment. Is going. Further, when the insulation treatment of the stator core 51 and the thermal spraying of the load side bracket 46 are performed in the same process, the insulation treatment of the stator core 51 can be effectively performed.
In the load side bracket 46, when a frame exists separately, the stator core 51 is held on the inner periphery of the frame, and a portion 51b of the stator core 51 that contacts the stator coil 52 is made of ceramic. The coating 46b is thermally sprayed, and is fastened and assembled to the load side bracket 46 in which the ceramic coating 46b is formed in the groove 46a with a bolt (not shown).

FIG. 15 is an explanatory view showing a method for manufacturing the stator of the rotating electrical machine.
In FIG. 15, the stator coil 52 and the load side bracket 46 are attached to a mold jig 56, and the stator 44 presses the end surface 52ac of the load side coil end 52a so as to be in close contact with the groove 46a. In this state, the stator 44 and the load side bracket 46 are integrated with the mold resin 54.
There is a gap between the mold jig and the stator coil 52 to ensure the insulation performance of the stator coil 52, and the ceramic coating 46b and the stator coil 52 are uneven by winding. There is space. The mold resin 54 is filled in a gap that secures the insulation performance of the stator coil 52 and an uneven space by the windings, and the stator coil 52 is molded. 44 and the load side bracket 46 are integrated by the mold resin 54. Depending on the thickness of the ceramic coating 46b of the groove 46a and the portion 51b of the stator coil 52 that contacts the stator core 51, the stator coil 52, the load side bracket 46, and the stator The rotating electrical machine can be reduced in size while ensuring the insulation performance with the iron core 51. The stator coil 52, the load side bracket 46, and the stator iron core 51 are made of the ceramic having high thermal conductivity. The stator 44 holds the stator 44 and the load side bracket 46 in the mold resin while pressing the end surface 52ac of the load side coil end 52a in close contact with the groove 46a. 54 can be integrated.

FIG. 16 is a flowchart showing a processing procedure for manufacturing the stator described above.
The part of the third embodiment of the present invention in which the rotating electrical machine is manufactured differently from the prior art is that the end face 52ac of the load side coil end 52a is pressed against the groove 46a while being in close contact with the stator 44. The load side bracket 46 is integrated with the mold resin 54.

FIG. 17 is a sectional side view showing a rotating electrical machine according to the fourth embodiment of the present invention.
In FIG. 17, a rotating electrical machine 61 is an embedded magnet type synchronous motor, and includes a cylindrical rotor 63 having a rotating shaft 62 and a stator 64, and the stator 64 is a load installed on the load side. It is held on the inner periphery of the side bracket 66 and is fastened to the load side bracket 66 together with the non-load side bracket 67 with bolts (not shown) and assembled. The rotor 63 is rotatably held by the load-side bracket 66 and the anti-load-side bracket 67 via a load-side bearing 68 and an anti-load-side bearing 69 installed on the rotary shaft 62, and the rotary shaft 42. On the opposite load side, an encoder unit 70 for detecting the rotational position is installed.
The stator 64 is insulated by attaching an insulating paper 76 to the teeth 71a of the stator core 71, winding a winding having an insulating film, and then pressurizing with a mold to form an outer shape. Then, the bonded air-core coil is attached to the tooth portion 71 a to form a stator coil 72. The inner side of the stator coil 72 is formed to be larger in the axial direction than the tooth portion 71a, and the load side coil end 72a of the stator coil 72 has an inner peripheral surface 72aa and an outer peripheral surface 72ab on one cylindrical surface. An end surface 72ac is formed on one conical surface, and the load side coil end 72a is integrated with the mold resin 74. A ceramic coating 72c is formed on the outer shape of the stator coil. The non-load side coil end 52b of the stator coil 52 is connected at a nearby connection portion 53. The load-side bracket 66 is formed with the load-side coil end 72a, an inner peripheral surface 72aa of the load-side coil end 72a, an outer peripheral surface 72ab, and a groove 66a that is in close contact with the end surface 72ac. The stator 64 is formed by integrating the stator 64 and the load side bracket 66 with the mold resin 54 while pressing the end surface 72ac of the load side coil end 72a in close contact with the groove 66a. . The ceramic coating 72 c is formed on the entire stator coil 72 to ensure the insulation performance of the stator coil 72. The thickness of the ceramic coating 72c is the minimum thickness that can ensure the insulation performance. Here, it is 0.3 to 0.5 mm.
The thickness of the ceramic coating 72c can reduce the size of the rotating electrical machine while ensuring the insulation performance between the load-side coil end 72 and the load-side bracket 66. With the end face 72ac of the load side coil end 72a pressed against the groove 66a through the ceramic coating 72c having high thermal conductivity, the stator 64 and the load side bracket 66 are connected to each other. The molded resin 74 can be integrated so that the heat generated in the stator coil 72 is effectively dissipated to improve the cooling effect, and the energization is larger than the allowable temperature of the stator coil 72. The rated output can be significantly improved.
In the fourth embodiment, the ceramic coating 72c is formed on the outer shape of the stator coil 72, but the heat generated in the stator coil 72 is transmitted through the groove 66a to the load side bracket 66. Therefore, even if the ceramic coating 72c is formed only on the load side coil end 72a, the heat generated in the stator coil 72 can be effectively dissipated. Further, not the outer shape of the stator coil 72 but at least the end surface 72ac of the inner peripheral surface 72aa, the outer peripheral surface 72ab, and the end surface 72ac of the load side coil end 72a in the groove 66a of the load side bracket 66. Similarly, even if the ceramic coating 72c is formed on one or more surfaces including the stator 64, the stator 64 is connected to the end surface of the load side coil end 72a via the ceramic coating 72c having a high thermal conductivity. The stator 64 and the load side bracket 66 can be integrated with the mold resin 74 while the 72ac is pressed against the groove 66a. When the load side bracket 66 has a separate frame, the stator core 71 is held on the inner periphery of the frame, and is fastened together with the load side bracket 66 by a bolt (not shown) and assembled. .

FIG. 18 is a front sectional view showing the rotating electrical machine.
In FIG. 18, a cylindrical rotor 63 having a rotation shaft 62 is an embedded magnet type rotor in which a permanent magnet 75 is embedded in the rotor 63. The stator 64 is formed by attaching an insulating paper 76 to the teeth portion 71a of the stator core 71 and performing insulation treatment, winding a winding having an insulating film, and then pressurizing with a mold to form an outer shape. The bonded air-core coil is attached to the tooth portion 71 a to form a stator coil 72 and is held on the inner periphery of the load-side bracket 66. A ceramic coating 72 c is formed on the outer shape of the stator coil 72.
The portion of the fourth embodiment of the present invention in which the rotating electrical machine is different from the prior art is a portion in which the inner side of the stator coil 72 is a rotating electrical machine formed larger in the axial direction than the tooth portion 71a.

FIG. 19 is an explanatory diagram illustrating a method for manufacturing the stator of the rotating electrical machine.
In FIG. 19, the load side coil end 72a of the stator coil 72 has an inner peripheral surface 72aa and an outer peripheral surface 72ab formed on one cylindrical surface, and an end surface 72ac formed on one conical surface. A ceramic coating 72c is formed on the outer shape of the stator coil. The inner side of the stator coil 72 is formed larger in the axial direction than the tooth portion 71a.
In the conventional method of manufacturing a rotating electrical machine, when the stator core 71 is assembled to the load side bracket 66, the stator coil 72 is also assembled at the same time and does not move in the axial direction. In the fourth embodiment, the inner side of the stator coil 72 is formed to be larger in the axial direction than the tooth portion 71a, so that there is a space 72d between the inner side of the stator coil 72 and the tooth portion 71a. Even if the stator core 71 is fixed, the stator coil 72 can be moved in the axial direction. Therefore, after assembling the stator 64 with the stator core 71 held by the load side bracket 66, the stator 64 has the end surface 72ac of the load side coil end 72a in the groove 66a. The stator 64 and the load side bracket 66 can be integrated with the mold resin 74 while being pressed against each other. The mold resin 74 is filled in the space 72d, and the stator 64 is formed by integrating the stator 64 and the load side bracket 66 with the mold resin 74.
In the fourth embodiment, the ceramic coating 72c is formed on the outer shape of the stator coil 72, but not the outer shape of the stator coil 72 but the groove 66a of the load side bracket 66. Among them, even if the ceramic coating 72c is formed on one or more surfaces including at least the end surface 72ac of the inner peripheral surface 72aa, the outer peripheral surface 72ab, and the end surface 72ac of the load side coil end 72a, The stator 64 is connected to the stator 64 and the load while pressing the end surface 72ac of the load side coil end 72a in close contact with the groove 66a through the ceramic coating 72c having high thermal conductivity. The side bracket 66 can be integrated with the mold resin 74.
In the load side bracket 66, when the stator core 71 is held on the inner periphery of the frame, the end surface 72ac of the load side coil end 72a is pressed against the groove 66a, The frame can be brought into close contact with the load side bracket 66, and the heat generated in the stator coil 72 is transferred to the frame through the stator iron core 71 and radiated to the outside of the motor. There is heat transferred to the bracket 66, and the heat generated in the stator coil 72 can be effectively radiated.

FIG. 20 is a flowchart showing a processing procedure for manufacturing the stator described above.
The part different from the prior art in the method of manufacturing the rotating electrical machine according to the fourth embodiment of the present invention is a part for pressing the end surface 72ac of the load side coil end 72a so as to be in close contact with the groove 66a.

It is a perspective view of the decomposition state which shows the rotary electric machine in 1st Example of this invention. It is a sectional side view which shows the rotary electric machine in 1st Example of this invention. 1 is a front sectional view showing a rotary electric machine according to a first embodiment of the present invention. It is an expanded sectional view showing the load side coil end in the 1st example of the present invention. It is an expanded sectional view showing the state where the stator coil and load side bracket in the 1st example of the present invention were stuck. It is explanatory drawing which shows the manufacturing method of the load side bracket in 1st Example of this invention. It is explanatory drawing which shows the manufacturing method of the stator in 1st Example of this invention, (a) shows the stator before shaping | molding, (b) has shown the stator after shaping | molding. It is explanatory drawing which shows the manufacturing method of the stator in 1st Example of this invention. It is a flowchart which shows the process sequence which manufactures the stator in 1st Example of this invention. It is an expanded sectional view of the load side coil end part which shows the rotary electric machine in 2nd Example of this invention. It is a sectional side view which shows the rotary electric machine in the 3rd Example of this invention. It is a front sectional view showing a rotating electrical machine in a third embodiment of the present invention. It is an expanded sectional view showing the load side coil end in the 3rd example of the present invention. It is explanatory drawing which shows the manufacturing method of the stator in the 3rd Example of this invention. It is explanatory drawing which shows the manufacturing method of the stator in the 3rd Example of this invention. It is a flowchart which shows the process sequence which manufactures the stator in 3rd Example of this invention. It is a sectional side view which shows the rotary electric machine in the 4th Example of this invention. It is a front sectional view which shows the rotary electric machine in the 4th Example of this invention. It is explanatory drawing which shows the manufacturing method of the stator in the 4th Example of this invention. It is a flowchart which shows the process sequence which manufactures the stator in the 4th Example of this invention. It is a sectional side view which shows the rotary electric machine in 1st prior art. It is a front sectional view showing a rotating electrical machine in the first prior art. It is a sectional side view which shows the rotary electric machine in 2nd prior art. It is sectional drawing which shows a part of stator coil of the rotary electric machine in 3rd prior art. It is a sectional side view which shows the rotary electric machine in 4th prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Rotating electrical machine 2 Rotating shaft 3 Rotor 4 Stator 5 Frame 6 Load side bracket 6a Load side bracket groove 6b Ceramic coating 7 Anti load side bracket 8 Load side bearing 9 Anti load side bearing 10 Encoder part 11 Stator core 12 Stator Coil 12a Load Side Coil End 12b Anti-Load Side Coil End 13 Connection Portion 14 Mold Resin

Claims (12)

A cylindrical frame;
Mounted on the stator core so that the stator core fitted and fixed to the inner peripheral surface of the frame, and the load side coil end and the anti-load side coil end protrude from both end surfaces in the rotation axis direction of the stator core. A stator having a stator coil made of windings,
A load-side bracket provided on the load side of the frame and formed with a groove into which the load-side coil end is inserted, and at least an end surface of an inner peripheral surface, an outer peripheral surface, and an end surface of the load-side coil end is provided. A load side bracket in which at least one surface is in close contact with the inner surface of the groove via an insulator without a gap;
An anti-load side bracket provided on the anti-load side of the frame;
A rotary shaft rotatably supported by the load side bracket and the anti-load side bracket via a load-side bearing and an anti-load side bearing;
A rotor attached to the outer peripheral surface of the rotating shaft;
With
The outer surface of the load side coil end is pressed and molded so that the shape of the one or more surfaces is the same as the shape of the inner surface of the groove to be in close contact, and a mold resin or varnish is placed in the groove of the load side bracket After inserting, the end face of the load side coil end is inserted into the groove of the load side bracket, and the stator is kept pressed so that the load side coil end is in close contact with the groove of the load side bracket. And a rotating electric machine in which the load side bracket is integrated with a mold resin or varnish .   2. The rotating electrical machine according to claim 1, wherein the load side bracket is made of an aluminum alloy, and a ceramic coating is formed on an inner surface of a groove of the load side bracket.   The stator core has a plurality of teeth portions forming slots on an inner peripheral portion, and a stator coil having an inner side formed longer in the axial direction than the teeth portions is attached to the teeth portions. The rotating electrical machine according to claim 1, wherein the rotating electrical machine is provided.   The stator iron core has an inner peripheral surface that does not form a slot in an inner peripheral portion, and a stator coil is mounted on the inner peripheral surface via a ceramic coating. Item 2. The rotating electrical machine according to Item 1.   5. The rotating electrical machine according to claim 4, wherein the ceramic coating is formed on a portion of the inner peripheral surface of the stator core that is in contact with the stator coil. 6. The rotating electrical machine according to claim 1, wherein a protruding length of the load-side coil end from the stator core is longer than a length of the groove in the rotation axis direction. A cylindrical frame;
The stator core fitted and fixed to the inner peripheral surface of the frame, and the load side coil end and the anti-load side coil end are mounted on the stator core so as to protrude from both end surfaces in the rotation axis direction of the stator core. A stator having a stator coil made of windings;
A load-side bracket provided on the load side of the frame and formed with a groove into which the load-side coil end is inserted, and at least an end surface of an inner peripheral surface, an outer peripheral surface, and an end surface of the load-side coil end is provided. A load side bracket in which at least one surface is in close contact with the inner surface of the groove via an insulator without a gap;
An anti-load side bracket provided on the anti-load side of the frame;
A rotary shaft rotatably supported by the load side bracket and the anti-load side bracket via a load-side bearing and an anti-load side bearing;
A rotor attached to the outer peripheral surface of the rotating shaft;
With
The load side bracket is made of ceramic, and pressurizes and forms the outer surface of the load side coil end so that the shape of the one or more surfaces is the same as the shape of the inner surface of the groove to be closely attached , After putting mold resin or varnish in the groove of the load side bracket, insert the end surface of the load side coil end into the groove of the load side bracket, and the load side coil end closely contacts the groove of the load side bracket A rotating electrical machine in which the stator and the load side bracket are integrated with a mold resin or a varnish while being pressed .   The stator coil is characterized in that two or more surfaces including at least the end surface among the inner peripheral surface, outer peripheral surface, and end surface of the load side coil end are formed in accordance with the shape of the groove. The rotating electrical machine according to any one of 1 to 7. A cylindrical frame;
The stator core is fitted and fixed to the inner peripheral surface of the frame, and the winding is attached to the stator core so that the load side coil ends protrude from both end surfaces in the rotation axis direction of the stator core. A stator with a stator coil;
A load side bracket provided on the load side of the frame;
An anti-load side bracket provided on the anti-load side of the frame;
A rotary shaft rotatably supported by the load side bracket and the anti-load side bracket via a load-side bearing and an anti-load side bearing;
A rotor attached to the outer peripheral surface of the rotating shaft;
In the manufacturing method of the rotating electrical machine comprising:
A groove that is in close contact with at least one of the inner peripheral surface, outer peripheral surface, and end surface of the load side coil end is formed in a portion of the inner surface of the load side bracket that faces the load side coil end. And
The outer surface of the load side coil end is pressed and molded so that the shape of the one or more surfaces is the same as the shape of the inner surface of the groove to be in close contact, and a mold resin or varnish is placed in the groove of the load side bracket After inserting, the end face of the load side coil end is inserted into the groove of the load side bracket, and the stator is kept pressed so that the load side coil end is in close contact with the groove of the load side bracket. And the load side bracket are integrated with mold resin or varnish .   The stator iron core has an inner peripheral surface that does not form a slot in an inner peripheral portion, and a ceramic coating is sprayed on a portion of the inner peripheral surface on which the stator coil is placed, to thereby form a stator. The coil is brought into close contact, and the end surface of the load side coil end is inserted into the groove of the load side bracket, and the fixing is performed while the load side coil end is pressed against the groove of the load side bracket. The manufacturing method of the rotating electrical machine according to claim 9, wherein the child and the load side bracket are integrated with a mold resin or a varnish. The method for manufacturing a rotating electrical machine according to claim 9, wherein the load-side bracket is made of an aluminum alloy, and a ceramic coating is formed on the inner surface of the groove of the load-side bracket by thermal spraying. The method for manufacturing a rotating electrical machine according to claim 9, wherein the load side bracket is made of ceramic.

Images