EP2891232A2

EP2891232A2 - Manufacturing method and a calibration system of an electric machine stator

Info

Publication number: EP2891232A2
Application number: EP13762378.1A
Authority: EP
Inventors: João Victor LINDROTH; Sergio Do Rosario; Anderson Wolf
Original assignee: Whirlpool SA
Current assignee: Whirlpool SA
Priority date: 2012-08-31
Filing date: 2013-08-28
Publication date: 2015-07-08
Also published as: BR102012022079A2; WO2014032150A2; MX2015002746A; CN104756375A; WO2014032150A3

Abstract

The present invention refers to an optimized process for manufacturing a dynamo-electric machine stator, which comprises a step of "calibrating" blades uses in the manufacture of a motor electric stator. Said "calibration" steps, which comprises the final step of said process, is responsible for the concentric deformation of the edges of polar bases of stator blades such that centers (13) and edges (12) of the polar bases (11) of all blades (1) of stator (20 comprises, in the end of the step of calibrating said dynamo-electric machine stator, a substantially circular general arrangement based on a virtual radius (R1).

Description

"PROCESS FOR MANUFACTURING AND CALIBRATION SYSTEM FOR A DYNAMO-ELECTRIC MACHINE STATOR"

Field of the Invention

The present invention refers to an optimized process for manufacturing a dynamo- electric machine stator and, more particularly, a step of "calibrating" blades used for making an electric motor stator, which comprises the final step of said process of making the stator, and it is essentially based on concentric deformation of the edges of polar bases of the stator blades.

Furthermore, the present invention refers to a system capable of carrying out a step of "calibrating" the manufacture of dynamo-electric machine stator.

Background of the Invention

In accordance with purely didactical definitions disclosed in academic literature, the term "dynamo-electric machines refers to a machine capable of transforming electric energy into mechanical energy, or also mechanic energy into electric energy by electromagnetic interaction between at least a "fixed" portion and at least a "movable portion."

In this sense, it is observed that a dynamo-electric machine comprises a ("fixed" portion) stator and a rotor ("movable" portion", wherein said stator is composed of fixed inductive cores, and the rotor is composed of movable inductive cores. Generally speaking, the function principle of interaction between stator and rotor rely on electromagnetic induction concepts, where magnetic fields generated by said fixed inductive cores are capable of generating movement in the movable inductive cores and, more specifically, in the rotor, where mechanical energy is obtained.

From the construction viewpoint, a dynamo-electric machine stator is essentially composed of a metal framework and a plurality of coils (electric conductors disposed in a circumventing way around a axis), wherein said coils are disposed in alignment with said metal framework. In this sense, and in accordance with conventional embodiments pertaining to the state of the art, said metal framework of the stator defines circularly edges spaced therebetween (and circumferentially joined therebetween by means of the upper ends thereof, wherein the lower edges are spaced from one another) by channels equally spaced from one another. Each radial axis defines a structure capable of holding electric conductors (which are "coiled", thereby defining an electric coil). Therefore, the "sum" of a radial axis and its respective electric coils then defines a fixed inductive core.

Conventionally, rotor and stator of a dynamo-electric machine have complementary embodiments such that a rotor is assembled inside its respective stator. To this effect, it is observed that the metal framework axes of the stator have a length sized to form a hollow circular space particular aimed at accommodating and positioned said rotor.

All the concepts above are known by those skilled in the art and can be better understood from Fig. 1A, which illustrates a plan and schematic view of a dynamo-electric machine stator in accordance with a conventional embodiment pertaining to the state of the art. It should be pointed out that in this merely illustrative figure, said stator is depicted with electric conductors forming the electric coils.

Also conventionally, it is observed that a huge portion of the dynamo-electric machine rotors is physically obtained by joining multiple metal blades having equivalent shapes therebetween (instead of being obtained in the form of metal monoblocks of difficult handlings and questionable quality results).

An example of dynamo-electric machine rotor obtained by joining multiple metal blades is disclosed in US 201 1/0127876, which illustrates and describes that a continuous metal blade in a strip form (raw material), when subjected to a stamping process, can be used in the manufacture of the stator multiple blades and rotor multiple blades. It also points out that said rotor blades are made of waste raw material of the stator blades. Although said document US 2011/0127876 describes an example of such embodiment, attention should be drawn to the fact that the presently discussed practice was known since the mid-1906s.

In addition to the foregoing, it is also known from those skilled in the art that the transversal "are" of electric conductors which form the stator coils comprises a feature capable of influencing the efficiency of the dynamo-electric machine. More specifically, it is already known that electric conductors of lower area more susceptible to the occurrence of Joule effect, in addition to the intrinsic limitation concerning the nominal electric current value which said conductors support. Therefore, it is convenient that said electric conductors forming the stator coils exhibit an area as great as possible (obeying the needs of each design). Nevertheless, the area of said electric conductors forming the stator coils tends to be limited by the features of the stator metal framework and, particularly, by the opening or gap existing between two constructional axes of the stator framework, into which said electro conductors are introduced and, subsequently, "coiled." In this sense, and from Fig. 1A, it is observed that each of axes XE of the stator blade XL comprises a final edge defined by two side flaps XAL. Therefore, the area of the electric conductors forming the stator coils ends up being limited to the space existing between said side flaps XAL of consecutives axes XE.

Nevertheless, it is also known from those skilled in the art that said space existing between the side flaps XAL of consecutive axes XE comprises a characteristic capable of influencing the efficiency of the dynamo-electric machine, this is why the higher the space the higher is the magnetic dispersion of the inductive core and, consequently, the higher is the yield of said dynamo-electric machine (relation between amount of electric energy transformed into mechanic energy or vice-versa).

Therefore, to make a dynamo-electric machine efficient, there should be a balance between the area of the electric conductors forming the stator coils and magnetic dispersion of the inductive core provided by the space existing between the side flaps of consecutive axes. Nevertheless, obtainment of such balance is extremely complex. In this sense, it is also known the possibility of producing stator blades having side flaps of "moving" axes through deformations made in the course of the process for manufacturing the stator itself. Examples of these types of blades and/or processes are disclosed in documents BR Pi9702724-3, US 4176444, US 4267719 and US 6742238.

BR PI9702724-3 refers to an electric motor stator blade, which comprises side flaps which can be handled during the stator manufacture process, thus allowing for "opening" and "closing" the channel of electric conductors housing.

US417644 and US4267719, both assigned to the same priority document, refer to a method and device for forming electric machine stators. Said method provides a series of steps which, in general, define that blades are firstly stamped and subsequently merged to form a stator metal framework. After forming said metal framework, the side flaps of the axes are subjected to pressure deformation and once said channels are open, the housing of the electric conductors is made. Next, said channels are opened, also by pressure deformation, and said method is complete.

With regard to US 6742239, same refers to a way of carrying out the "closing" of the edges of the stator blade channels by means of an equipment composed of a support structure and spheres capable of axial movement. In this case, it is observed that said spheres are disposed at the "open" edges" of the blade channels, and pressurized against same to general a radial force (exerted on the spheres and transmitted to the "open" edges of the blade channels), wherein said force is capable of "closing" the blade channels.

Hence, and in accordance with the examples described in BR PI9702724-3, US 4176444, US 4267719 and US 6742238, it can be observed that the productions of stators composed of blades having side flaps of the axes capable of being "moved" provides at least one step of "opening" the channels (usually after multiple blades are merged), and at least on step of "closing" the channels "usually after coiling the electric conductors). In this connection, attention should be drawn to the fact that the step of "closing" the channels is mainly intended to deform the blades (side flaps of the axes) such that they are brought into the initial format prior to the step of "opening" the channels.

For a better comprehension of these aspects, references are made to Figs. 1 B, 1 C and 1 D, which respectively illustrate an axis of the stator blade having flaps as initially obtained, a stator blade axis with flaps which have been deformed after the "opening" process, and a stator blade axis with flaps which have been deformed after the "closing" process. Such illustrations clearly refer to the current state of the art.

In accordance said figures, one may clearly note that the final result, in accordance with the processes and systems already known from the state of the art, after the "closing" process - condition and/or format of the flaps of the stator blade axes - is not achieved, that is, said stator blades when processed ("opening" and "closing" of the channels) usual do not return to their original format as stamped. Additionally, it is further noted that after the process of "closing" the stator blade channels asymmetry on both flaps of different axes in a same stator blade occurs.

In this context, it is observed that said final mentioned result explained above comprises negative characteristic which will compromise the general efficiency of the dynamo-electric machine. This stems from that fact that the final formats of the stator blade axes, when differing from the "original" format and/or when not homogeneous may cause physical interference (friction) in the rotor, and because of that a radial clearance between stator and rotor is increased, thereby resulting in a significant decrease of electric efficiency of the motor.

Such a physical interference, in addition to jeopardizing the dynamo-electric machine, can also damage the rotor itself, and thereby reducing the service-life of said dynamo-electric machine.

In this context explained above, it is clearly observed that there is a need in the current state of the art for a manufacturing solution and also for a process for manufacturing a dynamo-electric machine that does not present the drawbacks discussed above. Based on this scenario, the present invention was developed.

Objects of the Invention

Therefore, one object of the present invention is to provide a process for manufacturing a dynamo-electric machine stator particularly comprising a step for the "final finishing" of the stator format, and, more particularly, the format of the lower edge, including side flaps, of the stator blade axes.

A further object of the present invention is that said step of "final finishing", ou calibration step, render the opening of the stator, in which the rotor is housed, homogeneous, together with the possibility of reducing radial clearance between stator and rotor, which leads to the increase of the efficiency of an electric motor. To this effect, another object of the present invention is to provide a process capable of deforming the stator blades such that their format is substantially equivalent to the initial format and that prior to the steps of "closing" channels.

A yet object of the present invention is to provide a process for manufacturing a dynamo-electric machine stator that can obtain a stator which will not damage its respective rotor.

Also an object of the present invention is to provide a system for "calibrating" a dynamo-electric machine stator capable of "processing" said dynamo-electric machine stator in accordance with the basic concepts of the process for manufacturing the presently disclosed dynamo-electric machine stator.

Summary of the Invention

These and other objects of the present invention are fully achieved by means of a process for manufacturing a dynamo-electric machine stator, which comprises at least a step of stamping the stator blades, at least a step of merging multiple stator blades, at least a step of forming inductive cores in the housing channels of the electric conductors, at least a step of closing the housing channels of the electric conductors, and at least a step of calibrating the dynamo-electric machine stator. In accordance with the concepts and objects of the present invention, said step of calibrating the dynamo-electric stator comprises at least a sub-step of aligning said blades and at least a sub-step of concentrically deforming the edges of the polar bases of the blades.

Said sub-step of aligning the blades which comprises simultaneously aligning all stator blades from the center of the polar bases of said blades is carried out by means of radial force directed to the centers of the polar bases of the blades.

Preferably, all the center of the polar bases of the blades are subjected to the same radial force, which comprises a mechanical force against the center of the polar bases and, more particularly, a mechanical force produced by at least a radial displacement body.

Said sub-step of concentrically deforming the edges of the polar bases of the blades comprises simultaneously deforming all the edges of the polar bases of the stator blades from the center of said stator and this is carried out by a radial force directed to spaces existing between the spaces existing between the edges of the two consecutive polar bases.

Preferably, all the spaces existing between the edges of two consecutive polar based are subjected to one same radial force, which comprises force dimensional mechanic adjustment and, more particularly, one comprises force for dimensional mechanical adjustment generated by means of a radial displacement body. It should be pointed out that at least two diametrically opposite points of the body, when said radial force is directed to the spaces existing between the edges of two consecutive polar bases (1 1 ), generate mechanical adjustments to said edges of two consecutive polar bases.

Further, in accordance with principles and objects of the present invention, it is verified that the centers and edges of the polar bases of all stator blades comprise, in the end of the step of calibrating the dynamo-electric machine stator, a substantially circular general arrangement based on a virtual radius, this being substantially equivalent to the radius existing between the stator center and center of any one of the polar bases of the blades.

The objects of the present invention are also achieved by means of a system for calibrating dynamo-electric machine stator, which comprises multiple radial displacement bodies, at least a force transmission mechanical capable of generating, in an equal form, radial forces in the direction to multiple surfaces and/or segments of surfaces circularly disposed by means of radial displacements of said formerly mentioned multiple bodies, and at least an alignment adjustment mechanism capable of promoting alignment between said multiple bodies and surfaces and/or segments of surfaces circularly disposed in the stator.

In the preferred embodiment of said system for calibrating dynamo-electric machine stator, it is verified that the force transmission mechanism comprises at least a housing structure for said multiple radial displacement bodies (comprising multiple equidistant vertical hips which are concentrically arranged), at least a vertical displaceable central piston, and means for converting the central piston vertical displacement to radial displacement of the multiple bodies.

Preferably, the conversion of said central piston vertical displacement to radial displacement of the multiple bodies is carried out by means of at least a sphere disposed between each of the multiple bodies and its respective portion of the central piston. Multiple vertically aligned spheres disposed between each of the multiple bodies and their respective housings in the central piston area also disclosed.

Further, in accordance with a preferred embodiment of the system for calibrating the dynamo-electric machine stator, it can be observed that the alignment adjustment mechanism comprises at least a base provided with at least one angularly movable ring- shaped body and at least a locking element of the angularly movable ring-shaped body. It is worth mentioning that in general term the angularly movable ring-shaped body comprises at least one oblong hip defining the limits of angular movement of said ring-shaped body and the housing region of the locking element of the angularly movable ring-shaped body. Preferably, said alignment adjustment mechanism further provides for an assembling guide for a dynamo-electric stator machine.

Optionally, said force transmission mechanism and said alignment adjustment mechanism are disposed in one same operational matrix.

Brief Description of the Drawings

The present invention is described in detail based on figures listed below, wherein: Fig. 1A illustrates an embodiment of a blade of the dynamo-electric machine stator in accordance with the concepts already known in the current state of the art;

Fig. 1 B illustrates a stator blade axis in accordance with the concepts already known in the current state of the art, having flaps as initially obtained;

Fig. 1 C illustrates a stator blade axis in accordance with the concepts already known in the current state of the art, having deformed flaps after the "opening" process;

Fig. 1 D illustrates a stator blade axis in accordance with the concepts already known in the current state of the art, having deformed flaps after the "closing" process;

Fig. 2 illustrates a perspective view of an example of a dynamo-electric machine stator in accordance with the current state of the art;

Fig. 3 illustrates a top view of a dynamo-electric machine stator prior to the carrying out of the calibration step in accordance with the present invention;

Fig. 4 schematically illustrates the sub-step of final alignment of the stator blades in accordance with the present invention;

Fig. 5 schematically illustrates the sub-steps of concentrically deforming the edges of the polar bases of the stator blades in accordance with the present invention;

Fig. 6 illustrates a top view of the stator depicted in Fig. 2 after the carrying out of the calibration step in accordance with the present invention;

Fig. 7 illustrates a preferred embodiment of the system for calibrating the dynamo- electric machine stator according to the invention, in a perspective view; and

Fig. 8 illustrates a preferred embodiment of the system for calibrating the dynamo- electric machine stator in accordance with the present invention, in an exploded view.

Detailed Description of the Invention

As formerly described, one of the objects of the present invention is to manufacture, by means of a process for manufacturing dynamo-electric stator, a stator of substantially homogeneous inner opening, that is, it is substantially cylindrical. This is due to the fact that it is desirable to obtain a dynamo-electric machine (e.g. an electric motor), which rotor can freely act on the opening of its respective stator without causing physical interferences between both of them, wherein it comprises a minimal clearance between the rotor and stator.

To this effected, it is required that the format of the low edge, including the edges of the polar bases of the stator blade axes are delicately deformed such that the format thereof is substantially equivalent to the initial format (format prior to the step of "opening" the housing channels of electric conductors).

In this sense, a step of calibrating the dynamo-electric machine stator was developed, wherein it comprises a last step of the process for manufacturing dynamo-electric machine stator, this preferably also comprising former steps, viz.: step of stamping the stator blades; steps of merging multiple stator blades; step of forming inductive cores in the housing channels of the electric conductors; and the step of closing the housing channels of the electric conductors. It should be emphasize that said calibration step is preferably conducted only after the carrying out of the step of closing the housing channels of the electric conductors, this is why said calibration step generally comprises a step responsible for delicately deforming the edges of the polar bases of the stator blade axes.

Generally, said calibration step comprises a sub-step of finally aligning the stator blades and a sub-step of concentrically deforming the edges of the polar bases of the stator blades. The main idea is that in the end of said calibration step the centers of the polar bases of the stator blades and the edges of the polar based of the stator blades exhibit an essentially uniform and circumferentially equivalent alignment.

Concerning the calibration step of the process for manufacturing a dynamo-electric machine stator

The detailed concept of the "calibration" step as described above can be better understood in view of figures listed above.

As can be seen from Fig. 2, a dynamo-electric machine stator 2 (capable of being subjected to the referred to "calibration" step) is essentially composed of a plurality of blades 1 , which - when duly merged - defines a structural framework, whose interior comprises a series of axes (radially disposed and spaced therebetween) intended to coil electric conductors.

In this sense, when analyzed either merged or alone, it can be observed that each axis of a blade 1 comprises a polar base 1 1 which contains a lower and/or inner edge of said axis.

Each polar base 1 has a mild curvature, which can be better observed through a combined visualization of all polar bases 1 1 of a blade 1 . The sum of said mild curvatures results in forming a circular contour. Since said stator 2 is duly assembled, multiple polar bases 1 of multiple blades 1 will define in the stator 2 a housing or a substantially cylindrical channel which is capable of receiving a (not shown) rotor.

Furthermore, it should be pointed out that each of the polar bases 1 1 provides two laterally opposite edges 12. In truth,, the occurrence of said edges 12 stems from the fact that one polar base 1 1 is substantially wider than its respective axis, then the "remaining" side portions can be identified as edges 12. By convention, it can be also mentioned that each polar base 1 1 further provides a center 13. Hence, the mild curvature of each polar base 1 1 is disposed at the edges 12 and at the center 13 thereof.

All of these elements can be also seen in Fig. 3, which illustrates a stator 2 not yet subjected to the presently disclosed calibration step.

From this figure, it can be inferred that even if closed (housing channels of "closed" electric conductors), the edges 12 of polar bases 1 1 are not aligned therebetween, in addition no to being aligned with the centers 13 of their respective polar bases 1 1 . Such a "result", which is obtained after carrying out the "closing" step already known in the state of the art, can also allow for certain dynamo-electric machines to function with not compromised efficiency; however, this same "result" can also be - in more severe cases - to eliminate the functioning of other determined dynamo-electric machines and, more particularly, certain high speed AC electric motors used in compressors for refrigeration systems. This is a drawback to be overcome or at least mitigated by the present application.

To this effect, it is only required to subject stator 2 to the calibration step, as defined and claimed by the present invention.

Figure 4 schematically illustrates the first sub-step pertaining to the calibration step. This sub-step comprises simultaneously aligning all blades 1 of stator 2 from centre 13 of polar bases 1 1 of said blades 1. Said sub-step, event that it is "preparatory", is of extreme importance due to the fact to obtain an essential uniform and circumferentially equivalent alignment there will be required that all polar bases 1 1 of the stator 2 are longitudinally aligned with one another. It should be pointed out that the term "longitudinally" refers to the length of stator 2.

Such a simultaneous alignment is carried out by means of radial pressure P1 directed to centers 13 of polar bases 1 1 of blades 1. Generally, said radial pressure P1 comprises pressure by mechanical interference and, more particularly, pressure by mechanical interference generated by means of a radial displacement body 3. Evidently, the "stroke" of the expansive pressure P1 , or further the "stroke" of the bodies 3 capable of generating expansive pressure P1 is radially equal and this then permits that all the centers 13 of the polar bases 11 are aligned in conjunction.

Fig. 5 schematically illustrates the second sub-step pertaining to the calibration step. In said sub-step, simultaneous deformation of all edges 12 of polar bases 1 1 of blades 1 of stator 2 occurs from the centre of said stator 2. Said simultaneous deformation is conducted by radial pressure P2 directed to spaces existing between the edges 12 of two consecutive polar bases 1 1 , wherein all spaces existing between the edges 12 of two consecutive polar bases 1 1 are subjected to one same radial pressure P2.

Said radial pressure P2 comprises pressure by mechanical interference and, more particularly, by mechanical interference generated by at least one radial displacement body.

It is worth mentioning that at least two opposite points of body 3 when the radial pressure is directed to spaces existing between edges 12 of two consecutive polar bases 1 1 generate mechanical interference to said edges 12 of two consecutive polar bases 1 1.

As a final result, according to Fig. 6, it is verified that centers 13 and edges 12 of polar bases 1 1 of all blades 1 of stator 2 comprises an essentially circular general arrangement based on a virtual radius R1 , which is substantially equivalent to the radius existing between the centre of the stator 2 and the center 13 of any of the polar bases 1 1 of the blades 1.

Concerning the system for calibrating a dynamo-electric machine stator

Although the above-described process can be performed in any manufacturing system capable of achieving the above-mentioned alignment and deformation (by radial forces), a preferred mode of carrying out said step is disclosed. Said preferred system is better defined base on Figs. 7 and 8.

Essentially, the system defined below is capable of generating radial pressures P1 and P2, at different times, by mechanical force of a sole "game" of bodies 3.

To this effect, said system is essentially composed of multiple bodies 3, a mechanism 5 that generates force responsible of the calibration procedure, and an alignment adjustment mechanism 6. Both mechanism 5 and alignment adjustment mechanism 6 are disposed in one same operational matrix 7.

Each of the multiple bodies 3, all of having radial displacement, comprises (for all effects) a metal bar, wherein its contact surface has a central point and two lateral contact grooves. As formerly described in detail, the central point of each body 3 acts on its alignment sub-step and lateral grooves act on the physical deformation sub-step.

Said mechanism 5, which is capable of generating in equal form, radial pressures

P1 and P2 in direction to multiple surfaces and/or segments of surfaces circularly disposed by radial displacement of said multiple bodies 3, comprises a structure 51 , which contains a type of cage housing multiple bodies 3, and comprises a tubular body of cylindrical profile provided with equidistantiy and concentrically disposed multiple vertical hips, a displaceable vertically central piston 53, and means for converting said vertical displacement of the central piston 53 to radial displacement of said multiple bodies 3.

Preferably, the above-mentioned conversion means generally comprise multiple spheres 54 installed in vertically aligned cages disposed between each of said multiple bodies 3 and their respective housings in the central piston 53.

Such an embodiment allows for the central piston 53 to vertically displace inside the structure 51 (wherein said bodies 3 are assembled/aligned on their respective vertical hips 52), the displacement force is transferred, also in a vertical direction, to said spheres 54, which layer the bodies 3 by "pushing them outwardly." It is worth mentioning that this embodiment is particularly interesting because all the force (or effort) used to perform the vertical displacement of said central piston 53 converted to radial force (effort).

Therefore, it is noted that said mechanism 5 is in fact capable of generating forces P1 and P2 which are able to conduct the above-mentioned process. Preferably, the force exerted on the bodies by said mechanism 5 originates form a press or actuator 4.

Said alignment adjustment mechanism 6, which is capable of promoting alignment between the multiple bodies 3 and said surfaces and/or segments of circularly disposed surfaces, comprises a mechanism particularly intended to reposition said bodies 3 such that they in a first moment exert radial force P1 and in a second moment they exert radial force P2.

This feature is extremely useful because after all the two sub-steps mentioned above can be made with no intermediate assembling and disassembling of stator 2, i.e., said two sub-steps can be carried out in a single mechanism 5 with the same multiple bodies 3.

To this effect, said alignment adjustment mechanism 6 comprises a base 61 provided with an angularly movable ring-shaped body 62 and a locking element 63 to lock said ring-shaped body 62. In this sense, it should be pointed out that said ring-shaped body 62 comprises at least one oblong hip 64, which defines the angular moving limits of said ring- shaped body 62 (within which a housing region of the locking element 63 is defined).

Moreover, four assembling guides 65 for a dynamo-electric machine stator 2 are also disclosed. Preferably, such assembling guides comprise rods having a height equivalent to the height of said stator 2 to be processed. Eventually, locking elements, such as, for example, bolts and similar may also be provided.

Said assembling guides 65 are disposed in the ring-shaped body 62.

Hence, it is verified that stator 2, once housed on the assembling guides 65 follow the angular movement of said ring-shaped 62. By this way, mechanism 5 can provide the radial force P1. Next, said ring-shaped body 62 can angularly move (thus altering the alignment between the multiple bodies 3 and edges 12/centers 13 of the polar bases 1 1 of blades 2), followed by providing the radial force P2 comprising the own calibration.

Tests showed that (stator-rotor) assembling of the stators, in accordance with the present invention, has a rejection index substantially lower than that disclosed in the state of the art. This stems from the fact that the homogeneity of the stator cavity, in accordance with the present invention, allows for tighter and/or more accurate assembling.

Since schematic examples of results obtained by the present invention as well as preferred embodiments of certain aspects of the process have been disclosed above, it should be understood that the scope of the invention contemplates other possible variations conventional to those skilled in the art, wherein the scope of the present invention is limited by the contents of the set of claims, including equivalent means.

Claims

1. Process for manufacturing a dynamo-electric machine stator, comprising at least a step of stamping the stator blades, at least a step of merging multiple blades of the stator, at least a step of forming inductive cores in the housing channels of electric conductors, and at least a step of closing the housing channels of the electric conductors, CHARACTERIZED in that it further comprises at least a step of calibrating the dynamo-electric machine stator; the step of calibrating the dynamo-electric machine stator comprising at least a sub- step of aligning blades (1 ), and at least a sub-step of concentrically deforming edges (12) of polar bases (1 1 ) of blades (1 );

the sub-step of aligning the blades (1 ) comprising simultaneously aligning all blades

(1 ) of the stator (2) from center (13) of the polar bases (1 1 ) of said blades (1 );

the sub-step of concentrically deforming the edges (12) of the polar bases (1 1) of the blades comprising simultaneously deforming all the edges (12) of the polar bases (1 1 ) of the blades (1 ) of the stator (2) from the center of said stator (2);

said centers (13) and edges (12) of the polar bases (1 ) of all blades (1 ) of the stator (2) comprising in the end of the step of calibrating said dynamo-electric machine stator a general substantially circular arrangement based on a virtual radius (R1 ).

2. Process, in accordance with claim 1 , CHARACTERIZED in that the simultaneous alignments of all blades (1 ) of the stator (2) from the center (13) of said polar bases (1 1 ) of said blades (1 ) is carried out by a radial force (P1 ) directed to the centers (13) of the polar bases (1 1 ) of the blades (1 ).

3. Process, in accordance with claim 2, CHARACTERIZED in that all centers (13) of said polar bases (1 1 ) of the blades (1 ) are subjected to one same radial force (P1 ).

4. Process, in accordance with claim 2, CHARACTERIZED in that said radial force (P1 ) comprises a mechanical force against the center (13) of said polar bases (1 1 ).

5. Process, in accordance with claim 4, CHARACTERIZED in that said radial force (P1 ) comprises a mechanical force generated by at least one radial displacement body (3).

6. Process, in accordance with claim 1 , CHARACTERIZED in that said simultaneous deformations of all the edges (12) of the polar bases (1 1 ) of the blades (1 ) of stator (2) from the center of said stator (2) is carried out by a radial force (P2) directed to the spaces existing between edges (12) of two consecutive polar bases (1 1 ).

7. Process, in accordance with claim 6, CHARACTERIZED in that all spaces existing between said edges (12) of said two consecutive polar bases (11 ) are subjected to one same radial force (P2).

8. Process, in accordance with claim 6, CHARACTERIZED in that said radial force

(P2) comprises a force for mechanical dimensional adjustment.

9. Process, in accordance with claim 8, CHARACTERIZED in that said radial force (P2) comprises force for mechanical dimensional adjustment generated by at least one radial displacement body (3).

10. Process, in accordance with claim 6 or 9, CHARACTERIZED in that at least two diametrically opposite points of the body (3), when said radial force (P2) is directed to the spaces existing between the edges (12) of two consecutive polar bases (11 ), generate mechanical adjustments to said edges (12) of two consecutive polar bases (1 1).

11. Process, in accordance with claim 1 , CHARACTERIZED in that a virtual radius (R1 ) is substantially equivalent to a radius existing between said center of the stator (2) and center (13) of any of said polar bases (11 ) of the blades (1 ).

12. System for calibrating a dynamo-electric machine stator, CHARACTERIZED in that it comprises:

multiple radial displacement bodies (3);

at least a force transmission mechanism (4) capable of generating, in an equal form, radial forces (P1 and P2) in the direction of the multiple surfaces and/or segments of surfaces circularly disposed by radial displaces of said multiple bodies (3);

at least an alignment adjustment mechanism (6) capable of promoting alignment between said multiple bodies (3) and said surfaces and/or segments of surfaces circularly disposed in the stator (2).

13. System, in accordance with claim 12, CHARACTERIZED in that said force transmission mechanism (5) comprises:

at least a structure (51) for housing said multiple radial displacement bodies (3); said structure (51) comprising multiple equidistantly and concentrically disposed radial hips (52); at least a vertically displaceable central piston (53); and

means for converting the vertical displacement of said central piston (53) to radial displacement of said multiple bodies (3).

14. System, in accordance with claim 13, CHARACTERIZED in that said conversion of the vertical displacement of said central piston (53) to radial displacement of said multiple bodies (3) occurs through a sphere (54) disposed between each of said multiple bodies and their respective portion of the central piston (53).

15. System, in accordance with claim 14, CHARACTERIZED in that vertically aligned multiple bodies (3) and their respective housing in the central piston (53) are provided.

16. System, in accordance with claim 12, CHARACTERIZED in that the alignment adjustment mechanism (6) comprises:

at least a base (61) provided with at least an angularly movable ring-shaped body

(62); and

at least a locking element (63) of said angularly movable ring-shaped body (62).

17. System, in accordance with claim 16, CHARACTERIZED in that said angularly movable ring-shaped body (62) has at least an oblong hip (54); said oblong hip (64) defining the limits of angular movement of said ring-shaped body (62); the oblong hip (64) defining the housing region of the locking element (63) of the angularly movable ring-shaped body (62).

18. System, in accordance with claim 16, CHARACTERIZED in that said alignment adjustment mechanism (6) further provides an assembling guide (65) for a dynamo-electric machine stator (2).

19. System, in accordance with claim 2, CHARACTERIZED in that the force transmission mechanism (5) and the alignment adjustment mechanism (6) at disposed in one same operational matrix (7).