JP7809602B2 - Assembly method for permanent magnet rotating electric machine - Google Patents

Description

An embodiment of the present invention relates to a method for assembling a permanent magnet rotating electric machine.

One of the most common excitation methods for synchronous generator systems is the brushless excitation method. By using a permanent magnet rotating electric machine (auxiliary exciter) as the excitation source for the brushless AC exciter (main exciter), it is known to have the advantage of being able to provide a stable power supply independent of other power sources. In recent years, with the demand for increased power generation output from synchronous generators, there has been a need to increase the capacity of these permanent magnet rotating electric machines in order to increase the excitation current supplied to their field windings.

Permanent magnet rotating electric machines, which are made up of a rotor equipped with permanent magnets and a stator, have traditionally been assembled horizontally. This is because the capacity of permanent magnet rotating electric machines is not large, so even when inserting the stator into the rotor horizontally, it is possible to assemble them while adjusting the stator load and magnetic attractive force.

Japanese Patent Application Laid-Open No. 2001-37171 Japanese Patent Application Laid-Open No. 2008-259356 Japanese Patent Application Laid-Open No. 2002-218713

Patent Document 1 discloses a method for assembling a magnet motor in which a rotor equipped with permanent magnets is incorporated into a stator. In other words, by pre-magnetizing the magnetic material embedded in the rotor and then inserting the rotor into a predetermined position in the stator while rotating it in one direction, the magnetic field formed in the stator becomes uniform in the circumferential direction, and the magnetic force between the stator and rotor is also uniform, making it easy to assemble the rotor into the stator.

However, with the aforementioned horizontal assembly of permanent magnet rotating electric machines, as the capacity of permanent magnet rotating electric machines increases, the number of magnets installed on the rotor side increases, and the weight of the stator increases due to the increased inner diameter and length of the iron core. Therefore, when inserting the stator into the rotor horizontally, it becomes more difficult than with small-capacity rotating electric machines to insert the stator horizontally into the rotor while adjusting the tilt caused by the increased magnetic attractive force due to the number of magnets and the increased weight of the stator.

Embodiments of the present invention have been made in consideration of the above circumstances, and aim to provide a method for assembling a permanent magnet rotating electric machine that allows for easy assembly of a rotor and a stator equipped with permanent magnets, regardless of the magnetic attractive force of the permanent magnets.

A method for assembling a permanent magnet type rotating electric machine in an embodiment of the present invention is a method for assembling a permanent magnet type rotating electric machine by assembling a rotor and a stator having permanent magnets, and is characterized in that one of the rotor or the stator and an assembly jig are integrated by aligning their central axes, and then the other of the rotor or the stator is moved vertically along this central axis toward the one of the rotors using the assembly jig as a guide, with their central axes aligned with the assembly jig, to assemble the rotor and the stator , and after assembling the rotor and the stator, a spacer is placed between the rotor and the stator, and the rotor and the stator are further integrated using a holding jig, the assembly jig is then removed, and the integrated rotor and stator are then lifted and installed in a predetermined location, after which the holding jig and the spacer are removed, thereby completing the assembly of the permanent magnet type rotating electric machine .

According to an embodiment of the present invention, a rotor and a stator equipped with permanent magnets can be easily assembled regardless of the magnetic attraction force of the permanent magnets.

3A and 3B are a cross-sectional view of a rotor and a half cross-sectional view of a stator insertion jig, illustrating a first step in the assembly method for the permanent magnet type rotating electric machine according to the first embodiment; 2 is a cross-sectional view of the rotor showing a second step following the first step in FIG. 1 , and a half cross-sectional view of the stator and the stator insertion jig. 3 is a cross-sectional view of a rotor and a spacer, a half cross-sectional view of a stator, and a side view of a stator insertion jig, showing a third step following the second step in FIG. 2 . 4 is a cross-sectional view of the rotor, the spacer, and the holding jig, and a side view of the stator, showing a fourth step following the third step in FIG. 3 . 5 is a cross-sectional view of the rotor and spacer, a half cross-sectional view of the stator and rotor mounting plate, etc., and a side view of the holding jig, showing a fifth step following the fourth step in FIG. 4 . 6 is a cross-sectional view of the rotor showing a sixth step following the fifth step in FIG. 5, and a half cross-sectional view of the stator, rotor mounting plate, etc. FIG. 10 is a cross-sectional view of a rotor, a side view of a stator, and a half cross-sectional view of a first stator insertion jig, illustrating a second step in a method of assembling a permanent magnet type rotating electric machine according to a second embodiment. FIG. 10A and 10B are a cross-sectional view of a rotor, a half cross-sectional view of a stator, and a side view of a stator insertion jig, a support member, etc., illustrating a second step in a method of assembling a permanent magnet type rotating electric machine according to a third embodiment. 9 is a cross-sectional view of the rotor and spacer, a half cross-sectional view of the stator, and a side view of the stator insertion jig, support member, etc., showing a third step following the second step in FIG. 8 . 13A and 13B are a cross-sectional view of a rotor, a side view of a stator and a support member, etc., and a half cross-sectional view of a first stator insertion jig, showing a second step of a modified embodiment of the assembly method for a permanent magnet type rotating electric machine according to the third embodiment;

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[A] First embodiment (FIGS. 1 to 6)
Fig. 6 shows a permanent magnet type rotating electric machine 10 according to the first embodiment. The permanent magnet type rotating electric machine 10 shown in Fig. 6 is assembled by rotatably attaching a rotor 11 equipped with permanent magnets 13 to the outside of a stator 12, connecting the rotor 11 to a shaft 14 via a rotor mounting plate 20, and supporting the stator 12 on a support frame 15.

The rotor 11 has a cylindrical portion 16 made of a magnetic material, with multiple permanent magnets 13 fixed to the inner surface. The stator 12 has a ring-shaped core 17 made of laminated thin plates of magnetic material, with windings 18 provided on the outer periphery. This permanent magnet rotating electric machine 10 functions as a generator, outputting electric power from the stator 12, when the rotor 11 is rotated, for example, by driving the shaft 14.

Next, a method for assembling the permanent magnet type rotating electric machine 10 will be described with reference to FIGS.
In the first step shown in FIG. 1 , first, a stator insertion jig 21 is prepared as an assembly jig. This stator insertion jig 21 is configured by erecting an insertion guide 21A on a base plate 21B. The stator insertion jig 21 is installed with the central axis 21P of this insertion guide 21A set vertically. Next, the central axis 11P of the rotor 11 is aligned with the central axis 21P of the insertion guide 21A of the stator insertion jig 21, and the rotor 11 is suspended using a crane or the like. As shown in FIG. 2 , one end (the lower end in FIG. 2 ) of the suspended rotor 11 is fixed to the base plate 21B of the stator insertion jig 21 with bolts 22 or the like, and the rotor 11 is attached to the stator insertion jig 21 for integration.

In the second step shown in Figure 2, the central axis 12P of the stator 12 is aligned with the central axis 21P of the insertion guide 21A of the stator insertion jig 21. The stator 12 is then vertically suspended along the central axes 12P and 21P using a crane or similar device, and moved toward the rotor 11. Here, the outer diameter Ro of the insertion guide 21A of the stator insertion jig 21 is configured to approximately match the inner diameter Ri of the core 17 of the stator 12. Therefore, during the aforementioned approaching movement of the stator 12, the insertion guide 21A of the stator insertion jig 21 slides against the inner peripheral surface of the core 17 of the stator 12, functioning as a guide when the stator 12 is inserted and assembled inside the rotor 11.

In the third step shown in Figure 3, after assembling the stator 12 inside the rotor 11, spacers 23 are placed at multiple appropriate locations circumferentially between the rotor 11 and stator 12. Next, each of these spacers 23 is pressed against the outer circumferential surface of the stator 12 by a spacer fixing bolt 24 threaded into the rotor 11, thereby fixing and holding the spacers to the rotor 11 and stator 12. By placing the spacers 23 in this manner, the gap between the rotor 11 and the spacers is maintained uniformly circumferentially around the rotor 11 and stator 12.

In the fourth step shown in Figure 4, the other end of the rotor 11 (the upper end in Figure 4) and the end of the stator 12 (the upper end in Figure 4) are fixed together using a holding jig 25, for example with bolts, to integrate the rotor 11 and stator 12. Next, the integrated rotor 11 and stator 12 are lifted using a crane or the like, and the stator insertion jig 21 is removed.

In the fifth step shown in Figure 5, first, the rotor 11 and stator 12, which have been lifted together using a crane or similar device, are repositioned so that their central axes 11P and 12P are horizontal. Next, the lifted rotor 11 and stator 12 are moved horizontally, and one end of the rotor 11 (the left end in Figure 5) is attached to the rotor mounting plate 20 at a predetermined location using bolts 27 (Figure 6). This connects the rotor 11 to the shaft 14 via the rotor mounting plate 20. The holding jig 25 is then removed from the rotor 11 and stator 12.

In the sixth step shown in Figure 6, the end of the stator 12 (the right end in Figure 6) is fixed and supported by the support frame 15 with bolts 28. After the stator 12 is supported by the support frame 15, the spacer 23 (Figure 5) is removed from between the rotor 11 and stator 12, completing the assembly of the permanent magnet rotating electric machine 10.

As configured as above, the first embodiment provides the following effect (1).
(1) As shown in Fig. 2, the rotor 11 is attached to the stator insertion jig 21 with their central axes 11P and 21P aligned and integrated, and then the stator 12 is moved vertically along the central axes 12P and 21P toward the rotor 11 with their central axes 12P and 21P aligned relative to the stator insertion jig 21 (including the insertion of the stator 12 into the rotor 11). At this time, the insertion guides 21A of the stator insertion jig 21 guide the inner circumferential surface of the core 17 of the stator 12, thereby avoiding the influence of the magnetic attractive force of the permanent magnets 13 of the rotor 11. Therefore, the gap between the rotor 11 and the stator 12 can be maintained uniform in the circumferential direction during the approaching movement. Therefore, when the stator 12 is moved vertically toward the rotor 11, only the load of the stator 12 needs to be considered, without taking into account the magnetic attractive force of the permanent magnet 13. Therefore, the rotor 11 equipped with the permanent magnet 13 and the stator 12 can be easily assembled regardless of the magnetic attractive force of the permanent magnet 13.

In the first embodiment described above, the stator 12 is suspended from the rotor 11 integrated with the stator insertion jig 21, but the stator 12 may also be fixed. That is, the rotor 11 and stator 12 may be assembled by lifting the rotor 11 together with the stator insertion jig 21 using a lift 26 (Figure 2) relative to this fixed stator 12, or by suspending the rotor 11 together with the stator insertion jig 21 using a crane or the like.

Alternatively, the stator insertion jig 21 may be eliminated, and a rotor insertion jig (not shown) may be attached to the stator 12 to form an integrated unit, allowing the rotor 11 to move toward the fixed stator 12. In this case, the rotor 11 and stator 12 may be assembled by assembling an insertion guide that extends in the direction of the central axis 12P on the outside of the outer periphery of the stator 12. This guide guides the inner periphery of the rotor 11 as it moves toward the stator 12.

[B] Second embodiment (FIG. 7)
7 is a cross-sectional view of the rotor, a side view of the stator, and a half cross-sectional view of the first stator insertion jig, showing a second step in the assembly method for a permanent magnet type rotating electric machine according to the second embodiment. In this second embodiment, parts that are similar to those in the first embodiment are assigned the same reference numerals as in the first embodiment, and descriptions thereof will be simplified or omitted.

The assembly method for the permanent magnet rotating electric machine 10 in this second embodiment differs from the first embodiment in that the rotor 11 and stator 12 are assembled using a first stator insertion jig 31 as a first assembly jig integrated with the rotor 11, and a second stator insertion jig 32 as a second assembly jig integrated with the stator 12.

Here, the second stator insertion jig 32 is formed in a cylindrical shape, and its outer diameter Ro2 is configured to match the inner diameter Ri of the core 17 of the stator 12. The first stator insertion jig 31 has substantially the same shape as the stator insertion jig 21 of the first embodiment, and, like the stator insertion jig 21, is configured with an insertion guide 31A erected on a base plate 31B. In this first stator insertion jig 31, the outer diameter Ro1 of the insertion guide 31A is configured to substantially match the inner diameter Ri2 of the second stator insertion jig 32.

In the first step of the assembly method for the permanent magnet rotating electric machine 10 of the second embodiment, the center axis 11P of the rotor 11 is aligned with the center axis 31P of the insertion guide 31A of the first stator insertion jig 31, and the rotor 11 is suspended using a crane or the like. One end of the rotor 11 (the lower end in FIG. 7) is fixed to the base plate 31B of the first stator insertion jig 31 with bolts 22 or the like, and the rotor 11 is attached to and integrated with the first stator insertion jig 31. Furthermore, the center axis 32P of the second stator insertion jig 32 is aligned with the center axis 12P of the stator 12, and the second stator insertion jig 32 is inserted into the stator 12. The second stator insertion jig 32 is then attached to the inner surface of the core 17 of the stator 12 and integrated.

In the second step of the assembly method for the permanent magnet rotating electric machine 10 of the second embodiment, the center axis 31P of the insertion guide 31A of the first stator insertion jig 31 and the center axis 32P of the second stator insertion jig 32 are aligned, and the stator 12 is then vertically suspended along the center axes 31P and 32P using a crane or the like and moved toward the rotor 11. During this approach, the outer diameter Ro1 of the insertion guide 31A of the first stator insertion jig 31 and the inner diameter Ri2 of the second stator insertion jig 32 approximately match, so that the insertion guide 31A of the first stator insertion jig 31 slides against the inner surface of the second stator insertion jig 32 and functions as a guide, allowing the stator 12 to be inserted and assembled inside the rotor 11.

The third to sixth steps of the method for assembling the permanent magnet type rotating electric machine 10 in the second embodiment are the same as those in the first embodiment.
As configured as above, the second embodiment provides the following effects (2) and (3).

(2) The first stator insertion jig 31, to which the rotor 11 is attached and integrated, and the second stator insertion jig 32, to which the stator 12 is attached and integrated, are moved vertically toward each other along the central axes 31P and 32P (including the insertion of the stator 12 into the rotor 11) with their central axes 31P and 32P aligned. During this movement, the insertion guide 31A of the first stator insertion jig 31 slides against the inner circumferential surface of the second stator insertion jig 32, functioning as a guide, thereby avoiding the influence of the magnetic attractive force of the permanent magnets 13 of the rotor 11. This allows the circumferential gap between the rotor 11 and the stator 12 to be maintained uniform during the aforementioned approaching movement. Therefore, when moving the stator 12 toward the rotor 11, the magnetic attractive force of the permanent magnets 13 need not be taken into consideration, and only the load of the stator 12 needs to be considered. Therefore, the rotor 11 and stator 12 equipped with the permanent magnets 13 can be easily assembled regardless of the magnetic attractive force of the permanent magnets 13.

(3) When the first stator insertion jig 31, to which the rotor 11 is attached and integrated, and the second stator insertion jig 32, to which the stator 12 is attached and integrated, are moved vertically toward each other along the central axes 31P, 32P with their central axes 31P, 32P aligned to insert the stator 12 into the rotor 11, the insertion guide 31A of the first stator insertion jig 31 slides against the inner surface of the second stator insertion jig 32. Therefore, since the insertion guide 31A of the first stator insertion jig 31 does not slide against the inner surface of the stator 12, not only is it possible to prevent scratches on the inner surface of the stator 12, but it is also unnecessary to perform surface treatment on the inner surface of the stator 12 to prevent scratches.

In addition, meshable threads may be formed on the outer peripheral surface of the insertion guide 31A of the first stator insertion jig 31 and the inner peripheral surface of the second stator insertion jig 32. In this case, when the stator 12 integrated with the second stator insertion jig 32 is moved toward the first stator insertion jig 31 integrated with the rotor 11 and the first stator insertion jig 31 is inserted into the second stator insertion jig 32, the meshing of the threads causes the second stator insertion jig 32 and the stator 12 to rotate relative to the first stator insertion jig 31 and rotor 11. This further reduces the effect of the magnetic attraction force of the permanent magnets 13 of the rotor 11.

Alternatively, the stator 12 integrated with the second stator insertion jig 32 may be fixed rather than suspended, and the rotor 11 may be lifted together with the first stator insertion jig 31 relative to the stator 12 and second stator insertion jig 32 by a lift 26 (Figure 2), or the rotor 11 may be suspended together with the first stator insertion jig 31 by a crane or the like, and the rotor 11 and stator 12 may then be assembled.

[C] Third embodiment (FIGS. 8 to 10)
8 is a cross-sectional view of the rotor, a half cross-sectional view of the stator, and a side view of the stator insertion jig, support members, etc., showing a second step in the assembly method for a permanent magnet type rotating electric machine according to the third embodiment. In this third embodiment, parts that are similar to those in the first and second embodiments are given the same reference numerals as in the first and second embodiments, and descriptions thereof will be simplified or omitted.

The assembly method for the permanent magnet rotating electric machine 10 in this third embodiment differs from the first embodiment in that multiple stud bolts 41 are erected on the base plate 21B of the stator insertion jig 21 integrated with the rotor 11, multiple nuts 42 rotatably mounted on a support member 43 that supports the stator 12 are threaded onto the stud bolts 41, and the rotor 11 and stator 12 are assembled by adjusting the amount of rotation of these nuts 42. Here, multiple through holes 44 are formed in the support member 43 coaxially with the nuts 42.

In the first step of the assembly method for the permanent magnet rotating electric machine 10 of this third embodiment, the central axis 21P of the insertion guide 21A of the stator insertion jig 21 is aligned with the central axis 11P of the rotor 11, and the rotor 11 is hung down using a crane or the like. One end of the rotor 11 (the lower end in Figure 8) is then fixed to the base plate 21B of the stator insertion jig 21 with bolts 22 or the like. This attaches the rotor 11 to the stator insertion jig 21 and integrates it with the stator insertion jig 21. Next, stud bolts 41 are erected on the base plate 21B of the stator insertion jig 21. Furthermore, a support member 43 with a rotatable nut 42 is attached to the end of the stator 12 (the upper end in Figure 8) using bolts 45 or the like.

In the second step of the assembly method for the permanent magnet rotating electric machine 10 according to the third embodiment, the central axis 12P of the stator 12 is aligned with the central axis 21P of the insertion guide 21A of the stator insertion jig 21. The stator 12 is then vertically lowered along the central axes 12P and 21P using a crane or similar device, and moved toward the rotor 11. During this movement, the insertion guide 21A of the stator insertion jig 21 functions as a guide for the stator 12, and as shown in FIG. 9 , the rotational amounts of multiple nuts 42 are uniformly adjusted to thread the nuts 42 onto the stud bolts 41, and the stud bolts 41 are inserted through the through holes 44 of the support member 43. This inserts the stator 12 into the rotor 11, and the rotor 11 and stator 12 are assembled.

In the third step of the assembly method for the permanent magnet rotating electric machine 10 of this third embodiment, spacers 23 are placed at multiple appropriate locations circumferentially between the rotor 11 and the stator 12, and these spacers 23 are fixed and held to the rotor 11 and the stator 12 using spacer fixing bolts 24. Steps 4 to 6 of the assembly method for the permanent magnet rotating electric machine 10 of this third embodiment are the same as those of the first embodiment.

As configured as described above, the third embodiment achieves the same effect as effect (1) of the first embodiment, as well as the following effect (4).

(4) As shown in Figures 8 and 9, in the second step of the assembly method for the permanent magnet rotating electric machine 10, when the stator 12 is moved closer to the rotor 11, multiple nuts 42 attached to a support member 43 supporting the stator 12 are threaded onto multiple stud bolts 41 erected on a stator insertion jig 21 integrated with the rotor 11, and the amount of rotation of the multiple nuts 42 is adjusted evenly. This allows the inclination of the stator 12 relative to the rotor 11 to be corrected, the circumferential gap between the rotor 11 and stator 12 to be set evenly, and the insertion speed of the stator 12 relative to the rotor 11 to be finely adjusted.

The stator 12 supported by the support member 43 may be fixed, and the rotor 11, together with the stator insertion jig 21, may be raised by a lift or lowered by a crane or the like and moved closer to the stator 12. In this case, the nuts 42 provided on the support member 43 may be threaded onto the stud bolts 41 provided on the stator insertion jig 21, and the amount of rotation of these multiple nuts 42 may be adjusted evenly to assemble the rotor 11 and stator 12.

Alternatively, the stator insertion jig 21 integrated with the rotor 11 may be removed, and the rotor 11 may be supported by a support member 43. A rotor insertion jig (not shown) equipped with an insertion guide extending in the direction of the central axis 12P outside the outer periphery of the stator 12 may be attached to the stator 12 and integrated therewith, and the rotor 11 may be moved closer to the stator 12. In this case, each of the multiple nuts 42 provided on the support member 43 may be threaded onto each of the multiple stud bolts 41 erected on the rotor insertion jig, and the amount of rotation of these multiple nuts 42 may be adjusted evenly to assemble the rotor 11 and stator 12.

Figure 10 shows the second step in a modified embodiment of the assembly method for the permanent magnet rotating electric machine 10 in the third embodiment, in which the third embodiment is applied to the second embodiment.

In this modified embodiment, multiple stud bolts 41 are erected on the base plate 31B of the first stator insertion jig 31, which is integrated with the rotor 11. Multiple nuts 42 are rotatably mounted on a support member 43 that supports the stator 12. Each of the multiple nuts 42 is threaded onto each of the multiple stud bolts 41, and the amount of rotation of these multiple nuts 42 is adjusted to assemble the rotor 11 and stator 12.

In other words, in the second step of this modified embodiment, the center axis 31P of the insertion guide 31A of the first stator insertion jig 31 is aligned with the center axis 32P of the second stator insertion jig 32, and the stator 12 is then suspended vertically along the center axes 31P and 32P and moved toward the rotor 11. During this movement, the insertion guide 31A of the first stator insertion jig 31 slides against the inner surface of the second stator insertion jig 32 to function as a guide, and the rotation amounts of the multiple nuts 42 are adjusted evenly to thread the nuts 42 onto the stud bolts 41 and pass the stud bolts 41 through the through holes 44 of the support member 43. This inserts the stator 12 inside the rotor 11, and the rotor 11 and stator 12 are assembled.

Steps 1 and 3 to 6 in the above modified embodiment are the same as those in the third embodiment. Furthermore, this modified embodiment also achieves the same effects (1) and (4) as the third embodiment.

Although several embodiments of the present invention have been described above, these embodiments are presented as examples and are not intended to limit the scope of the invention. These embodiments can be implemented in a variety of other forms, and various omissions, substitutions, changes, and combinations can be made without departing from the spirit of the invention. Furthermore, such substitutions, changes, and combinations are included within the scope and spirit of the invention, as well as within the scope of the invention and its equivalents as set forth in the claims.

10...Permanent magnet rotating electric machine, 11...Rotor, 11P...Center shaft, 12...Stator, 12P...Center shaft, 13...Permanent magnet, 21...Stator insertion jig (assembly jig), 21P...Center shaft, 23...Spacer, 25...Retaining jig, 31...First stator insertion jig (first assembly jig), 31P...Center shaft, 32...Second stator insertion jig (second assembly jig), 41...Stud bolt, 42...Nut, 43...Support member

Claims (4)

A method for assembling a permanent magnet type rotating electric machine by assembling a rotor having permanent magnets and a stator, comprising the steps of:
After integrating one of the rotor or the stator and the assembly jig by aligning their central axes,
the other of the rotor and the stator is moved toward the other of the rotor and the stator in a vertical direction along the central axis using the assembly jig as a guide, with the central axes of the rotor and the stator aligned with each other relative to the assembly jig, to assemble the rotor and the stator ;
After assembling the rotor and the stator, a spacer is disposed between the rotor and the stator, and the rotor and the stator are integrated using a holding jig.
Next, the assembly jig is removed,
Next, the integrated rotor and stator are lifted and installed in a predetermined location, and then the holding jig and the spacer are removed to complete the assembly of the permanent magnet rotating electric machine . A method for assembling a permanent magnet type rotating electric machine by assembling a rotor having permanent magnets and a stator, comprising the steps of:
the rotor and the first assembly jig are integrated together with their central axes aligned;
The stator and the second assembly jig are integrated by aligning their central axes with each other,
Thereafter, the first assembly jig and the second assembly jig are brought into sliding contact with each other in the vertical direction along the central axis with their central axes aligned, and are moved toward each other while functioning as a guide, thereby assembling the rotor and the stator ;
After assembling the rotor and the stator, a spacer is disposed between the rotor and the stator, and the rotor and the stator are integrated using a holding jig.
Next, the first assembly jig and the second assembly jig are removed,
Next, the integrated rotor and stator are lifted and installed in a predetermined location, and then the holding jig and the spacer are removed to complete the assembly of the permanent magnet rotating electric machine . 2. The method for assembling a permanent magnet type rotating electric machine according to claim 1, wherein, when assembling the rotor and the stator, a stud bolt is erected on an assembly jig integrated with either the rotor or the stator, and the rotor and the stator are assembled by adjusting the amount of rotation of a nut threaded onto the stud bolt. 3. The method for assembling a permanent magnet type rotating electric machine according to claim 2, wherein, when assembling the rotor and the stator, a stud bolt is erected on a first assembly jig integrated with the rotor, and the rotor and the stator are assembled by adjusting the amount of rotation of a nut threaded onto the stud bolt.