JPH09182395A - Manufacture of rotor of squirrel-cage induction machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To form the rotor of a squirrel-cage induction machine capable of being integrated without die-casting and without inserting a plurality of conductors into slot holes and the fit-in holes of end rings. SOLUTION: First, a secondary conductor 11 is formed in a strip-like ladder- like form and at the sane time a rotor core 12 is molded in a strip-like form so as to provide a slot part 16 in a thin thickness part 15. The secondary conductor 11 is inserted into the slot part 16 and at the same time a rotor core 12 is wound on a rotor shaft and after that, the rotor shaft is integrated with the rotor core 12 by welding, resin-molding or a binding tape.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a rotor of an inner rotor type or outer rotor type cage induction machine.

[0002]

2. Description of the Related Art FIG. 25 shows, for example, JP-A-7-147757.
FIG. 3 is a rotor cross-sectional view showing a conventional method for manufacturing a rotor of a squirrel cage induction machine as disclosed in Japanese Patent Publication No. JP-A-2003-242, in which 1 is a shaft fitted in a shaft fitting hole 2, 3 is a rotor core, Four
Is a secondary conductor, 5 is a slot provided in the rotor core 3 for housing the secondary conductor 4, and 6 is an end ring.

FIG. 26 shows, for example, Japanese Unexamined Patent Publication No. 4-3514.
FIG. 51 is a perspective view showing a method of manufacturing a rotor of a conventional squirrel cage induction machine shown in Japanese Patent Publication No. 51-51, in which 1 is a shaft, 3 is a rotor core, 6 is an end ring, and 7 is an end ring 6. It is a conductor bar fitted in a fitting hole provided.

Next, the operation will be described. In the method of manufacturing the rotor of the squirrel cage induction machine shown in FIG. 25, the rotor core 3 is die-cast by melting aluminum into the slots 5 and the end rings 6 of the rotor core 3 which are press punched after assembly. A general method is to integrate the secondary conductor 4 with the secondary conductor 4.

Further, in the method of manufacturing the rotor of the squirrel cage induction machine shown in FIG. 26, a plurality of conductor bars 7 made of wire rods are used.
Is generally penetrated into the slot hole of the rotor core 3, fitted into the fitting hole of the end ring 6 made by punching a plate material, and assembled by brazing or ultrasonic waves.

[0006]

Since the conventional method for manufacturing the rotor of the squirrel cage induction machine is configured as described above,
Secondary conductor 4 of the rotor of the cage induction machine by die casting
In the case of forming the secondary conductor 4, since a porosity is generated in the secondary conductor 4, it often causes secondary current loss, uneven rotation, and abnormal noise. There were problems such as the need for large-scale equipment for casting.

Further, when the conductor bar 7 is fitted in the fitting hole of the end ring 6 to form the secondary conductor 4, the number of the conductor bars 7 is the same as the number of the slot holes, so that the number of parts to be assembled is large, and the assembly is increased. It ’s not good,
Since the number of the fitting holes of the end ring 6 is the same as the number of the slot holes, it is difficult to fit a plurality of conductor bars 7, or the fitting portion has a large electric resistance and the function as a secondary conductor is deteriorated. was there.

The present invention has been made to solve the above problems, and can be integrated without die casting, and without inserting a plurality of conductor bars into slot holes or fitting holes of end rings. An object of the present invention is to obtain a method of manufacturing a rotor of a squirrel cage induction machine that forms a rotor of the squirrel cage induction machine.

[0009]

According to a first aspect of the present invention, there is provided a method of manufacturing a rotor of a squirrel cage induction machine, which comprises forming a conductive material into a strip-shaped ladder shape in a secondary conductor forming step. In the core forming step, the core is formed into a substantially fan shape for each tooth, the outer peripheral side between the teeth is connected with a thin portion, and the magnetic material is formed into a band shape so that a slot portion is provided in the thin portion. Then, in the combination step, after the secondary conductor is housed in the slot portion and the core is wound around the rotor shaft or the inner peripheral ring, the core and the rotor shaft are integrated by welding, resin molding or bind tape. It will be transformed.

According to a second aspect of the present invention, there is provided a method for manufacturing a rotor of a squirrel cage induction machine, which comprises first forming a conductive material into a strip-like ladder shape in the secondary conductor forming step, and forming a core in the core forming step. The magnetic material is molded so that the core divided for each tooth is composed of a yoke core portion, a tooth portion, and a thin portion connecting them. Then, in the combination step, the core is inserted into the ladder shape of the secondary conductor, the yoke core portion is bent at the thin portion to form the shape of the rotating body, and then welding, resin molding or bind tape is used. The core and the secondary conductor are integrated.

According to a third aspect of the present invention, there is provided a method of manufacturing a rotor for a squirrel cage induction machine, which comprises first forming a conductive material into a strip-like ladder shape in the secondary conductor forming step, and forming a core in the core forming step. A magnetic material is formed into a gear shape. Then, in the combination step, after winding the secondary conductor around the gear-shaped groove, the core is integrated with the secondary conductor by welding, resin molding or bind tape.

According to a fourth aspect of the present invention, there is provided a method for manufacturing a rotor of a squirrel cage induction machine, wherein the conductive material is formed into a strip-like ladder shape in the secondary conductor forming step, and the core is formed in the core forming step. The teeth portion and the outer peripheral ring core are formed as separate bodies, and these teeth portions are integrated into a gear shape by resin molding. Then, in the combination step, the secondary conductor is wound around the core integrated in the shape of a gear and then integrated with the outer peripheral ring core.

According to a fifth aspect of the present invention, in a method for manufacturing a rotor of a squirrel cage induction machine, a stator facing portion formed of a magnetic material is provided at a tip end of a gear shape in a core forming step, and in a combining step, After winding the secondary conductor around the gear-shaped groove, the stator facing portion is bent, and the core is integrated with the secondary conductor by welding, resin molding or bind tape.

According to a sixth aspect of the present invention, there is provided a method for manufacturing a rotor of a squirrel cage induction machine, wherein a surface of a conductive material formed in a strip-like ladder shape is subjected to an insulation treatment in a secondary conductor forming step. .

According to a seventh aspect of the present invention, there is provided a method for manufacturing a rotor of a squirrel cage induction machine, wherein, in the step of forming a secondary conductor, a conductive material formed in a strip-like ladder shape is replaced with copper, a copper alloy or an aluminum alloy. Or a thin plate of copper, a copper alloy and an aluminum alloy material is arbitrarily stacked and formed.

According to an eighth aspect of the present invention, there is provided a method for manufacturing a rotor of a squirrel cage induction machine in which a protrusion for fixing a balancing piece of the rotor is formed in a strip-like ladder shape in the step of forming the secondary conductor. is there.

According to a ninth aspect of the present invention, there is provided a method for manufacturing a rotor of a squirrel cage induction machine, wherein a fan blade for air cooling is formed in a strip-like ladder shape in the secondary conductor forming step.

According to a tenth aspect of the present invention, there is provided a method for manufacturing a rotor of a squirrel cage induction machine, wherein a strip-shaped ladder shape is formed into a parallelogram in the secondary conductor forming step, and a core forming step is performed.
The slot or gear shape is formed so as to have a skew depending on the parallelogram ladder shape.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below. Embodiment 1 FIG. 1 is a perspective view showing a secondary conductor and a rotor core of a rotor according to a first embodiment of the present invention. In the figure, 11 is a secondary conductor in which a conductive material is formed into a strip-like ladder shape, 12 Is a rotor core formed of a magnetic material in a strip shape. Reference numeral 13 denotes secondary conductor mating portions formed on both ends of the secondary conductor 11, 14 denotes fan-shaped portions provided for each tooth, 15 denotes thin-walled portions connecting the outer peripheral sides of the fan-shaped portions 14, and 16 denotes them. Slot portions provided in the thin portion 15, 17 is a rotor core dividing surface, 18 is a caulking portion, and 19 is a rotor core mating portion. The rotor core 12 is laminated as shown in the figure. FIG. 2 is a front view showing an inner rotor type rotor in which a secondary conductor and a rotor core are combined, and in the drawing, 20 is a rotor shaft.

Next, the operation will be described. In FIG. 1, the secondary conductor 11 is formed by punching out a plate material made of a conductive material with a press so as to have a strip-like ladder shape, and at the same time forming the secondary conductor mating portions 13 at both ends of the secondary conductor 11. Secondary conductor 1
The material of No. 1 is not limited to an aluminum plate, and an aluminum alloy plate, a copper plate, or a copper alloy plate can be easily manufactured. Further, the rotor core 12 is provided with a fan-shaped portion 14 for each tooth, and the outer peripheral sides of the fan-shaped portions 14 are connected by a thin portion 15, and a slot portion 16 is provided in the thin portion 15. Stack in the state. The laminated layers may be fixed by punching and caulking in a progressive press, or may be fixed by welding after pressing or after forming the rotor.

Next, as shown in FIG. 2, the slot portion 16
The secondary conductor 11 is housed in and the rotor core 12 is wound around the rotor shaft 20. It is formed into a shape of a rotor by winding, and the secondary conductor mating portions 13 and the rotor core mating portions 19 are joined by welding or the like to be integrated. It should be noted that resin molding or binding tape may be used for integration, or rotor core dividing surfaces 17 may be bonded together for integration.

FIG. 3 is a perspective view showing a case where the cross section of the slot portion of the secondary conductor is formed into a rounded shape.
Such molding is performed by press molding. By molding the cross section of the secondary conductor slot portion 21 into a rounded shape, it is possible to form a secondary conductor cross section that matches the shape of the slot portion 16 of the rotor core 12, and as a result, the rotor core 12 The secondary conductor slot portion 21 does not rattle in the slot portion 16, and the rotor core 12 and the secondary conductor slot portion 21 can be ideally arranged.
Magnetic flux can be efficiently converted into power.

FIG. 4 is a front view showing a secondary conductor formed by spot-joining two rows of plate members and a plurality of rod members. In the drawing, 22 is two rows of plate members and 23 is a plurality of members. No. 2 and 24 are spot joints. By forming the secondary conductor 11 in this manner, the material yield can be improved.

FIG. 5 is a front view showing an inner rotor type rotor in which a secondary conductor and a rotor core are combined with an inner peripheral ring. In the figure, reference numeral 25 denotes an inner peripheral portion having a protrusion 26. It's a ring. Generally, a large-diameter rotor increases in weight, and the rotor core 12 connected by the thin-walled portion 15 is easily deformed by the thin-walled portion 15. However, the rotor core 12 is separated from the belt-shaped thin-walled connecting core by an inner ring. By dividing into 25, the thin connecting core can be made lighter, the thin portion 15 is less likely to be deformed, and a large-diameter rotor can be easily manufactured.

As described above, according to the first embodiment,
The conductive material is formed into a band-shaped ladder-shaped secondary conductor 11 by pressing, forging, etc., is wound in combination with the rotor core 12, and is further integrated by welding, resin molding or bind tape, so it is extremely easy. It is possible to assemble, and it is possible to obtain a homogeneous and stable rotor without the need for aluminum die casting, and to manufacture at low cost without requiring large-scale equipment. Also,
Since the secondary conductor 11 can be manufactured by press molding without melting like the die casting method, the material of the secondary conductor 11 can be arbitrarily selected, and the secondary conductor 11 suitable for the characteristics of the induction machine can be selected. .

Embodiment 2 FIG. 6 is a front view showing an outer rotor type rotor core according to a second embodiment of the present invention, in which 31 is a rotor core (core) and 32 is a rotor core.
Is a yoke core portion, 33 is a tooth portion, and 34 is a thin wall portion connecting the yoke core portion 32 and the tooth portion 33. The figure shows a state before bending after press punching and a state in which the thin portion 34 is bent to form a rotor. FIG. 7 is a sectional view showing a state in which the rotor core before bending is combined with a secondary conductor, and FIG. 8 is a front view showing an outer rotor type rotor by combining the rotor core and the secondary conductor. , 35 are mold resins.

Next, the operation will be described. As shown in FIG. 6, the outer rotor type rotor core 31 includes a yoke core portion 32, a tooth portion 33, and a thin wall portion 3 connecting them.
The magnetic material is molded so as to be composed of 4. Next, as shown in FIG. 7, the rotor core 3 is inserted into the ladder shape of the secondary conductor 11.
1 is inserted, and further, as shown in FIG. 8, the rotor core 31 before folding and the strip-shaped ladder-shaped secondary conductor 11 combined in the state of FIG. Then, the yoke core portion 32 of each rotor core 31 is bent at the thin portion 34 to assemble the outer rotor type rotor. After assembly, as shown in FIG. 8, there is a method of integrating with a mold resin 35 or a method of integrating by welding or adhering a mating portion. Alternatively, they may be integrated with a bind tape.

As described above, according to the second embodiment,
A band-shaped ladder-shaped secondary conductor 11 is formed by pressing or forging a conductive material, and the yoke core portion 32 is bent in combination with the rotor core 31, and further integrated by welding, resin molding or bind tape. Therefore, it is possible to assemble very easily, it is not necessary to perform aluminum die casting, and a homogeneous and stable rotor can be obtained, and it is possible to inexpensively manufacture without requiring large-scale equipment. Further, since the secondary conductor 11 can be manufactured by press molding without melting as in the die casting method,
The material of the secondary conductor 11 can be arbitrarily selected, and the secondary conductor 11 suitable for the characteristics of the induction machine can be selected. Furthermore, since the rotor core 31 is divided and molded, the material yield can be improved.

Embodiment 3 9 is a front view showing a state in which a secondary conductor is wound around a gear-shaped rotor core according to Embodiment 3 of the present invention, in which 41 is a gear 42.
And a rotor core having a slot portion 43. FIG. 10 is a front view showing an inner rotor type rotor in which a secondary conductor is wound around a rotor core and then the outermost periphery is fixed with a bind tape, and 44 is a bind tape.

Next, the operation will be described. As shown in FIG. 9, after winding the strip-shaped ladder-shaped secondary conductor 11 around the rotor core 41 having the gear 42 and the slot portion 43 a plurality of times, as shown in FIG. Unify. The secondary conductor 11 may be integrated by welding or bonding while winding. Alternatively, the binding tape 44 may be omitted and the resin may be integrated. In this way, the inner rotor type rotor can be assembled.

As described above, according to the third embodiment,
The conductive material is formed into a band-like ladder shape by pressing or forging, and is combined with the rotor core 41 having the gear 42 and the slot portion 43 and further integrated by welding, resin molding, or the bind tape 44. It is possible to assemble extremely easily, and it is possible to obtain a homogeneous and stable rotor without the need for aluminum die casting, and to manufacture at low cost without requiring large-scale equipment. Further, since the secondary conductor 11 can be manufactured by press molding without melting as in the die casting method, the material of the secondary conductor 11 can be arbitrarily selected, and the secondary conductor 11 suitable for the characteristics of the induction machine can be obtained. Can be selected.

Embodiment 4 FIG. 11 is a front view showing an outer rotor type rotor according to a fourth embodiment of the present invention. In the figure, 51 is a tooth portion in which a rotor core is separated from an outer peripheral ring core, and 52 is a space between the tooth portions 51. Is a resin-molded integrally-molded resin portion, and is molded into a gear shape as shown in the figure. FIG. 12 is a front view showing an outer rotor type rotor in which a ring core is fitted after winding a secondary conductor a plurality of times, and 53 is an outer peripheral ring core.

Next, the operation will be described. As shown in FIG. 11, resin molding is performed between the tooth portions 51 having a cylindrical portion of magnetic material or a protruding portion at the tip to form a gear shape. Then, as shown in FIG. 12, after the secondary conductor 11 is wound a plurality of times between the tooth portions 51 having the gear shape,
The outer peripheral ring core 53 is fitted and integrated.

As described above, according to the fourth embodiment,
The outer rotor type rotor can be assembled very easily.

Embodiment 5 FIG. FIG. 13 is a front view showing a state in which a secondary conductor is wound around a gear-shaped rotor core according to Embodiment 5 of the present invention. The difference from Embodiment 3 is that the outer periphery of the gear-shaped rotor core is different. In this section, a stator facing portion connected to the tip by a thin portion is provided. In the figure, 56 is a rotor core (core), 57 is a gear, 58 is a stator facing portion provided at the tip of the gear 57, and 59 is a thin portion connecting the gear 57 and the stator facing portion 58. FIG. 14 is a front view showing an inner rotor type rotor in which the stator facing portion is bent to the inner peripheral side and fixed by welding or bonding after winding the secondary conductor.

Next, the operation will be described. As shown in FIG. 13, a stator facing portion 58 connected to the thin portion 59 is provided at the tip of the gear 57, and after the secondary conductor 11 is wound around the slot portion 43 of the gear 57, as shown in FIG. The inner rotor type rotor is obtained by bending the stator facing portion 58 to the inner peripheral side and integrating it by welding, bonding or the like.

As described above, according to the fifth embodiment,
After winding the secondary conductor 11 around the slot portion 43 of the gear 57, the stator facing portion 58 is bent toward the inner peripheral side,
The inner rotor type rotor can be assembled more easily.

Embodiment 6 FIG. FIG. 15 is a perspective view showing a state in which an insulating paint is sprayed on the secondary conductor according to the sixth embodiment of the present invention. In the figure, 61 is a coating gun and 62 is an insulating paint.

Next, the operation will be described. In the rotor, when the current flowing through the secondary conductor 11 flows through the rotor core 12, the characteristics deteriorate. Therefore, it is preferable that the secondary conductor 11 and the rotor core 12 are in an insulating state. In the sixth embodiment, since the insulating treatment can be performed in a strip shape, the manufacturing is easy. The same effect can be obtained by applying electrodeposition coating in addition to spray coating. In addition, the strip-shaped secondary conductor 11
As a method of performing insulation treatment on, the resin film for insulation may be covered. As shown in FIG. 16, the insulating film 63
17 is covered with a strip-shaped ladder-shaped secondary conductor 11, and then, by heat welding, ultrasonic bonding, or the like, as shown in FIG. 17, only the portion corresponding to the slot 16 is covered with the insulating film 63. ing.

As described above, according to the sixth embodiment,
Since the secondary conductor 11 can be insulated, the characteristics can be improved without the current flowing through the secondary conductor 11 flowing through the rotor core 12. In addition, since the secondary conductor 11 can be subjected to the insulating treatment in a strip shape, the manufacturing can be facilitated.

Embodiment 7 FIG. FIG. 18 is a perspective view showing a case where the secondary conductor according to Embodiment 7 of the present invention is composed of a plurality of conductive materials. The conductive material in this case is not limited to the aluminum plate, but an arbitrary different conductive material such as an aluminum alloy plate, a copper plate or a copper alloy plate is combined to adjust the electric resistance of the secondary conductor 11.

As described above, according to the seventh embodiment,
By combining a plurality of conductive materials, for example, it is possible to reduce the electric resistance to form a highly efficient motor, or to increase the electric resistance to form a motor having a large starting torque.

Embodiment 8 FIG. FIG. 19 is a perspective view showing a state in which a projection for fixing a balancing piece of a rotor is provided on an end ring portion of a secondary conductor according to Embodiment 8 of the present invention. In the figure, 65 is a projection. . Protrusion 6
The shape of 5 may be formed into a prism or a cylinder depending on the shape of the balancing piece. FIG. 20 is a perspective view showing a state in which the balance washer is fixed to the protrusion after the secondary conductor is wound, and in the figure, reference numeral 66 is the balance washer fixed to the protrusion 65.

As described above, according to the eighth embodiment,
It is possible to easily provide the protrusion 65 for fixing the balancing piece of the rotor on the end ring portion.

Ninth Embodiment FIG. 21 is a perspective view showing a state in which a projection for forming a fan blade for air cooling is provided on an end ring portion of a secondary conductor according to Embodiment 9 of the present invention. In the figure, 67 is a fan blade. It is a protrusion. FIG. 22 is a perspective view showing a state in which, after winding the secondary conductor, the projection is bent to form a fan blade for air cooling.

As described above, according to the ninth embodiment,
A fan blade for air cooling can be easily provided on the end ring portion.

Embodiment 10 FIG. FIG. 23 is a front view showing a state where a parallelogram ladder-shaped secondary conductor is wound around an outer rotor type rotor core in which teeth are skewed according to Embodiment 10 of the present invention. Reference numeral 71 denotes a tooth portion provided with a cylindrical portion or a protrusion of a magnetic material at the tip thereof and further provided with a skew, and 72 denotes a parallelogram hole provided in a ladder-shaped secondary conductor. FIG.
4 is a perspective view showing a state in which a parallelogram-shaped ladder-shaped secondary conductor is combined with a skewed inner rotor type rotor core, and the rotor core 12 is skewed.

As described above, according to the tenth embodiment, the rotor provided with the skew can be easily obtained, and the induction machine with less uneven rotation and vibration can be obtained.

[0049]

As described above, according to the first aspect of the present invention, the secondary conductor is formed into a strip-like ladder shape, and the core is formed into a strip-like shape so that the thin portion is provided with the slot. Since the secondary conductor is housed and the core is wound around the rotor shaft or the inner ring, it is integrated by welding, resin molding or bind tape, so that the inner rotor type rotor can be easily assembled. You can In addition, it can be integrated without die-casting, a homogeneous and stable rotor can be obtained, and it can be manufactured at low cost without requiring large-scale equipment. Furthermore, since the secondary conductor can be manufactured by press molding without melting, there is an effect that the material of the secondary conductor can be arbitrarily selected according to the characteristics.

According to the second aspect of the present invention, the secondary conductor is formed in a strip-like ladder shape, and the core is a yoke core portion,
After forming the tooth portion and the thin wall portion connecting them, inserting the core into the ladder shape of the secondary conductor, and bending the yoke core portion at the thin wall portion to form the shape of the rotating body. Since they are integrated by welding, resin molding or bind tape, the outer rotor type rotor can be easily assembled. In addition, it can be integrated without die-casting, a homogeneous and stable rotor can be obtained, and it can be manufactured at low cost without requiring large-scale equipment. Furthermore, since the secondary conductor can be manufactured by press molding without melting,
The material of the secondary conductor can be arbitrarily selected according to the characteristics. Further, since the core is divided and molded, the yield of the material can be improved.

According to the third aspect of the present invention, the secondary conductor is formed into a strip-like ladder shape, the core is formed into a gear shape, and the secondary conductor is wound around the gear-shaped groove and then welded,
The rotor can be easily assembled because the resin molding or the binding tape is integrated. In addition, it can be integrated without die-casting, a homogeneous and stable rotor can be obtained, and it can be manufactured at low cost without requiring large-scale equipment. In addition, 2
Since the secondary conductor can be manufactured by press molding without melting, there is an effect that the material of the secondary conductor can be arbitrarily selected according to the characteristics.

According to the fourth aspect of the present invention, the secondary conductor is formed into a strip-like ladder shape, the teeth portion is integrated with the gear shape by resin molding, the secondary conductor is wound, and then the outer peripheral ring core is formed. Since it is configured so as to be integrated with, there is an effect that the outer rotor type rotor can be assembled very easily.

According to the invention of claim 5, a stator facing portion formed of a magnetic material is provided at the tip of the gear shape, the secondary conductor is wound around the gear shaped groove, and then the stator facing portion is bent, Since they are integrated by welding, resin molding or bind tape, there is an effect that the inner rotor type rotor can be more easily assembled.

According to the sixth aspect of the present invention, since the surface of the conductive material formed in the shape of a strip ladder is insulated, the secondary conductor can be insulated. The characteristics can be improved without the flowing current flowing through the core. In addition, since the secondary conductor can be subjected to the insulation treatment in a strip shape, there is an effect that manufacturing can be facilitated.

According to the invention of claim 7, the conductive material formed in the shape of a strip ladder is made of copper, a copper alloy or an aluminum alloy, or a thin plate of copper, copper alloy and aluminum alloy. Since it was configured to be stacked arbitrarily, a combination of a plurality of conductive materials,
There is an effect that the electric resistance can be reduced to form a high-efficiency motor, or the electric resistance can be increased to form a motor with a large starting torque.

According to the eighth aspect of the present invention, since the protrusion for fixing the balancing piece of the rotor is formed in a strip-like ladder shape, the balancing piece of the rotor is fixed to the end ring portion. There is an effect that the projection for can be easily provided.

According to the ninth aspect of the invention, since the fan blade for air cooling is formed in the shape of a strip ladder, the fan blade for air cooling can be easily provided in the end ring portion. is there.

According to the tenth aspect of the present invention, the strip-shaped ladder shape is formed into a parallelogram, and the slot or gear shape is configured to be skewed according to the parallelogram ladder shape. It is possible to obtain a rotor provided with a skew at the position, and it is possible to obtain a device with less uneven rotation and vibration.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a secondary conductor and a rotor core of a rotor according to a first embodiment of the present invention.

FIG. 2 is a front view showing an inner rotor type rotor including a combination of a secondary conductor and a rotor core.

FIG. 3 is a perspective view showing a case where the cross section of the slot portion of the secondary conductor is formed into a rounded shape.

FIG. 4 is a front view showing a secondary conductor formed by spot-bonding two rows of plate members and a plurality of rod members.

FIG. 5 is a front view showing an inner rotor type rotor in the case where a secondary conductor and a rotor core are combined with an inner peripheral ring.

FIG. 6 is a front view showing an outer rotor type rotor core according to a second embodiment of the present invention.

FIG. 7 is a cross-sectional view showing a state in which a rotor core before bending is combined with a secondary conductor.

FIG. 8 is a front view showing an outer rotor type rotor that is a combination of a rotor core and a secondary conductor.

FIG. 9 is a front view showing a state in which a secondary conductor is wound around a gear-shaped rotor core according to Embodiment 3 of the present invention.

FIG. 10 is a front view showing an inner rotor type rotor in which a secondary conductor is wound around a rotor core and then the outermost periphery is fixed with a bind tape.

FIG. 11 is a front view showing an outer rotor type rotor according to a fourth embodiment of the present invention.

FIG. 12 is a front view showing an outer rotor type rotor in which a ring core is fitted after winding a secondary conductor a plurality of times.

FIG. 13 is a front view showing a state in which a secondary conductor is wound around a gear-shaped rotor core according to Embodiment 5 of the present invention.

FIG. 14 is a front view showing an inner rotor type rotor in which a stator facing portion is bent to an inner peripheral side after being wound with a secondary conductor, and is fixed by welding or adhesion.

FIG. 15 is a perspective view showing a state in which a coating material for insulation is sprayed on the secondary conductor according to the sixth embodiment of the present invention.

FIG. 16 is a perspective view showing a state in which an insulating film is covered on a secondary conductor.

FIG. 17 is a perspective view showing a state in which only a portion corresponding to a slot portion is wrapped with an insulating film.

FIG. 18 is a perspective view showing a case where a secondary conductor according to Embodiment 7 of the present invention is made of a plurality of conductive materials.

FIG. 19 is a perspective view showing a state in which a protrusion for fixing a balancing piece of a rotor is provided on an end ring portion of a secondary conductor according to Embodiment 8 of the present invention.

FIG. 20 is a perspective view showing a state in which the balance washer is fixed to the protrusion after the secondary conductor is wound.

FIG. 21 is a perspective view showing a state in which a projection for forming a fan blade for air cooling is provided on an end ring portion of a secondary conductor according to Embodiment 9 of the present invention.

FIG. 22 is a perspective view showing a state in which, after winding the secondary conductor, the protrusion is bent to form a fan blade for air cooling.

FIG. 23 is a front view showing a state in which a parallelogram ladder-shaped secondary conductor is wound around an outer rotor type rotor core in which teeth are skewed according to Embodiment 10 of the present invention.

FIG. 24 is a perspective view showing a state in which a parallelogram ladder-shaped secondary conductor is combined with a skewed inner rotor type rotor core.

FIG. 25 is a rotor cross-sectional view showing a method of manufacturing a rotor of a conventional squirrel cage induction machine.

FIG. 26 is a perspective view showing a method of manufacturing a rotor of a conventional squirrel cage induction machine.

[Explanation of symbols]

11 secondary conductor, 12, 31, 41 rotor core (core), 15, 34 thin portion, 16 slot portion, 20
Rotor shaft, 25 inner ring, 32 yoke core part, 3
3,51 Teeth part, 44 bind tape, 53
Outer peripheral ring core, 58 stator facing portion, 65 protrusion.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Nobuaki Miyake 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Sanryo Electric Co., Ltd.

Claims (10)

[Claims] 1. A conductive material is formed into a strip-like ladder shape. 2.
Next conductor forming step, forming a core for each tooth into a substantially fan shape, and connecting the outer peripheral side between these teeth with a thin portion,
Further, a core forming step of forming a magnetic material into a strip shape so as to provide a slot portion in the thin portion, and the secondary conductor is housed in the slot portion and the core is wound around a rotor shaft or an inner ring, and then welded. A method of manufacturing a rotor of a cage induction machine, comprising a step of combining the core and the rotor shaft with a resin molding or a binding tape and combining an inner rotor type rotor. 2. A conductive material is formed into a strip-like ladder shape. 2.
In the step of forming the next conductor, in the step of forming the magnetic material so that the core divided into each tooth is composed of the yoke core part, the teeth part and the thin part connecting them, and in the ladder shape of the secondary conductor. After the core is inserted into the core and the yoke core portion is bent at the thin portion to form the shape of the rotating body, the core and the secondary conductor are integrated by welding, resin molding or bind tape, and the outer rotor is formed. A method of manufacturing a rotor of a cage induction machine, comprising a combination step of combining rotors of a mold. 3. A conductive material is formed into a strip-like ladder shape. 2.
Next conductor forming step, core forming step of forming a magnetic material into a gear shape, and winding the secondary conductor around the gear shape groove, and then welding, resin molding or bind tape to form the core into the secondary conductor. A method of manufacturing a rotor of a cage induction machine, comprising a combination step of integrating and combining an inner rotor type rotor. 4. The conductive material is formed into a strip-like ladder shape 2.
A step of forming a next conductor; a step of molding the core separately from the tooth portion and the outer peripheral ring core to form the tooth portion by resin molding into a gear shape; A method of manufacturing a rotor of a squirrel cage induction machine, comprising: a winding step; 5. The core forming step comprises providing a stator facing portion formed of a magnetic material at the tip of the gear shape, and the combining step winding the secondary conductor around the gear shape groove and then bending the stator facing portion. The method for manufacturing a rotor of a squirrel cage induction machine according to claim 3, wherein the core and the secondary conductor are integrated with each other by welding, resin molding or binding tape. 6. The secondary conductor forming step comprises insulating the surface of a conductive material formed in a strip-like ladder shape, according to any one of claims 1 to 5. Method for manufacturing rotor of squirrel cage induction machine. 7. The secondary conductor forming step uses a conductive material formed into a strip-like ladder shape as a material of copper, a copper alloy or an aluminum alloy, or a material of copper, a copper alloy and an aluminum alloy. 7. The method for manufacturing a rotor of a squirrel cage induction machine according to claim 1, wherein the thin plates are stacked arbitrarily. 8. The secondary conductor forming step forms a protrusion for fixing a balancing piece of a rotor in a strip-like ladder shape, according to any one of claims 1 to 7. Method for manufacturing a rotor of a squirrel cage induction machine. 9. The squirrel cage induction machine according to claim 1, wherein the step of forming the secondary conductor forms a fan blade for air cooling in the shape of a strip ladder. Manufacturing method of rotor. 10. The secondary conductor forming step forms a strip-shaped ladder shape into a parallelogram shape, and the core forming step forms a slot portion or a gear shape with skew according to the parallelogram ladder shape. It shape | molds, The claim 1 characterized by the above-mentioned.
10. The method for manufacturing a rotor of a squirrel cage induction machine according to claim 9.