JP2001119872A - Synchronous rotating electric machine, wind power generator, and method of manufacturing the same - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To accurately obtain the circularity of the diameter of the void surface of a stator core having a large diameter, assemble the stator core,
A synchronous rotating electric machine that can be disassembled, transported, replaced, and the like, and a method of manufacturing the same are obtained. SOLUTION: Stator magnetic poles 13 formed in a frame 3 having side plates 4 and having stator coils 8 concentratedly wound therearound are circumferentially arranged in a circumferentially adjacent manner to form a stator iron core 5. The side plate is attached to the side plate 4 with the mounting bolt 7 via the clamper 6.
Tighten.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a synchronous electric rotating machine constituted by using split stator cores and a method of manufacturing the same, and more particularly, to a large-sized rotating electric machine in which transportation, maintenance, replacement of a failed coil and the like are easy. The present invention relates to a synchronous rotating electric machine and a wind power generator suitable for a wind power generator and a method for manufacturing the same.

[0002]

2. Description of the Related Art Generally, wind power generators are often installed in remote locations where traffic is inconvenient, such as on remote islands. Therefore, as the capacity of the power generator increases, the transport, maintenance, replacement of a failed coil, etc. Is desired to be easy. However, a conventional wind power generator mainly uses a winding field synchronous generator or an induction generator, and the stator has a coil in which a coil is wound around a groove of a stator core. For this reason, in a large-diameter generator accompanying the increase in capacity of a wind power generator in recent years, it is difficult to perform divided transportation after winding,
It is necessary to make a complicated winding structure in order to dare to divide the structure. To cope with such a problem, for example, Japanese Unexamined Patent Publication No. 7-75311 discloses a technique in which an E-shaped iron core is modularized so that it can be divided, and a polygonal iron core surface constitutes a void surface.

[0003] However, in the structure described in the above publication, when the stator core is formed by combining the E-shaped cores, the gap surface becomes polygonal, so that it is difficult to secure the diameter accuracy of the gap surface. The gap length cannot be reduced to the permissible limit. Also, the existence of the circumferential gap between the attached E-shaped iron cores causes a change in magnetic resistance when the magnetic flux generated by the rotor magnet passes therethrough, thereby generating electromagnetic vibrations and noise due to generation of harmonic ripples. There's a problem. Further, there is also a problem that the circumferential air gap increases the magnetic resistance with respect to the magnetic flux of the rotor magnet, which causes a decrease in the output of the generator.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and can accurately obtain the roundness of the diameter of the air gap surface of a stator core having a large diameter. It is another object of the present invention to provide a synchronous rotating electric machine that can easily perform assembly, disassembly, transportation, maintenance, replacement, and the like of a stator core, and a method of manufacturing the same.

[0005]

A synchronous rotating electric machine according to the present invention is a synchronous rotating electric machine having a stator winding concentratedly wound for each stator magnetic pole of a stator core arranged in a frame. The stator magnetic poles are individually formed by a silicon steel sheet laminated body, and the stator core is formed by combining stator magnetic poles in an annular shape and individually removably. The stator magnetic pole has an upper extending portion extending in one circumferential direction and a lower extending portion extending in the other circumferential direction. The upper surface of the extending portion is joined.
The stator magnetic pole includes a first stator magnetic pole having an upper extension extending on both sides in the circumferential direction and a second stator magnetic pole having a lower extension extending on both sides in the circumferential direction. And
The lower surface of the upper extending portion of the adjacent first and second stator poles and the upper surface of the lower extending portion are joined.

The stator magnetic pole has a pair of lower extending portions extending on both sides in the circumferential direction, and a silicon steel plate is laminated on the upper surface of the lower extending portion of the adjacent stator magnetic pole. The lower surfaces of the stator magnetic pole coupling bodies are joined together. The stator magnetic pole has a fitting protrusion on one side in the circumferential direction and a fitting recess on the other, and the fitting protrusion and the fitting recess of the adjacent stator magnetic pole are fitted to each other. It is formed. In addition, a required gap is provided in the circumferential direction between adjacent stator magnetic poles combined. The outer periphery of the stator core is fastened by a fastening band. Further, the stator magnetic pole is constituted by a stator magnetic pole main body and a stator magnetic pole piece removably connected to each other. Further, the stator magnetic poles or the stator magnetic pole coupling body constituting the stator core are formed by punching and stacking silicon steel plates having an easy axis of magnetization in the circumferential direction.

A wind power generator according to the present invention is configured using each of the above-described synchronous rotating electric machines. A method of manufacturing a synchronous rotating electric machine according to the present invention is directed to a method of manufacturing a synchronous rotating electric machine including a stator winding that is concentratedly wound for each stator magnetic pole of a stator core disposed in a frame. A step of manufacturing the magnetic pole as a separate body, a step of manufacturing a stator winding that is concentratedly wound for each stator magnetic pole, and incorporating the stator winding into the stator magnetic pole to form an annular stator magnetic pole, and The method includes a step of forming the stator core in such a manner that the stator cores can be individually taken out and combined with each other.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 Hereinafter, a synchronous generator according to an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a front sectional view of a main part of a wind turbine generator to which the synchronous generator of the present invention is applied, and FIG. 2 is a side view showing a configuration of a stator core of the synchronous generator according to the first embodiment of the present invention. FIG. 3 is a front cross-sectional view around the stator core of the synchronous generator in FIG. 1, and FIG. 4 is a side view as viewed in the direction of arrow A in FIG. 3.

As shown in FIG. 1, a synchronous generator 1 according to the first embodiment is composed of a stator 2, a rotor 30 and their supporting parts. Reference numeral 3 denotes a frame made of a cylindrical plate material, and a fixed number of stator magnetic poles formed by punching and laminating a silicon steel plate on the inner diameter side and arranged in a circumferential direction (both not shown). A child iron core 5 is arranged and bolted (not shown) to the side plate 4 integrated with the frame 3. Reference numeral 8 denotes a stator winding concentratedly wound around each of the stator magnetic poles of the stator core 5, and the stator 2 includes the components 3 to 5, and 8 described above. Reference numeral 9 denotes a bracket attached to the side plate 4 of the frame 3 and has a function of supporting the cooling air guide and the stator 2. Reference numeral 10 denotes a fixed shaft attached to the inner diameter side of the bracket 9. Reference numeral 31 denotes a spider, and a rotor magnetic pole 34 made of a permanent magnet is attached to the outer periphery of a rotor yoke 32 provided on the outer periphery thereof by bolting (not shown) for each magnetic pole pitch. The rotor 30 includes the above components 31, 32, and 34. A connecting shaft 36 is connected to the inner diameter side of the spider 31, and the connecting shaft 36 and the fixed shaft 10 are connected via rolling bearings 11, 12.
0 can rotate about the axis of the fixed shaft 10. The other end of the connecting shaft 36 has a windmill rotating portion 50.
Are connected. Reference numeral 51 denotes a blade of the wind turbine rotating unit 50.

Next, the arrangement of the stator magnetic poles, the configuration of the stator core, and the details of the mounting structure thereof will be described with reference to FIGS. As shown in FIG. 2, a stator magnetic pole plate 13a is prepared by punching a silicon steel plate coated with an adhesive, for example, 0.5 mm thick, and laminated for each magnetic pole. By processing at a temperature of the order of magnitude, each fixed stator magnetic pole 13 is completed. The outer diameter of the stator magnetic pole plate 13a is formed to the outer diameter of the stator core 5, and the inner diameter of the stator magnetic pole plate 13a is formed to the outer diameter of the gap g. 13a ₁ is mounting holes. Each stator pole 13 has a stator winding 8
, And the stator poles 13 are arranged adjacent to each other in the circumferential direction to form an annular stator core 5.
In this case, the distance between adjacent stator magnetic poles 13 is 0.1 mm.
The circumferential dimension of each stator pole plate 13a is determined so that a gap δ of about 3 to 0.5 mm can be obtained, and the deformation of the stator core 5 due to thermal expansion due to the assemblability of the stator core 5 and temperature changes is dealt with. ing. The stator core 5 configured as described above is disposed in the frame 3 as shown in FIGS. 1, 3, and 4, and is fastened to the side plate 4 by using an annular clamper 6 and a mounting bolt 7. The rotor magnetic pole 34
Are the rotor yokes 3 as shown in FIGS.
2 having different polarities (N, S) are alternately arranged on a positioning seat 33 provided on the outer periphery of the rotor yoke 32.
From the back side of the mounting bolt 35.

As described above, in the synchronous generator according to the first embodiment, the stator core 5 is configured such that the stator magnetic poles 13 in which the stator windings 8 are concentratedly wound are arranged adjacently in the circumferential direction. Therefore, even if the diameter of the synchronous generator is a large stator core, the roundness of the diameter of the air gap surface can be easily and accurately obtained, and the disassembly and assembly of the stator core can be performed by each stator magnetic pole 13. Every time, so the synchronous generator split transportation, maintenance,
There is an effect that a defective product can be easily exchanged on site. In the first embodiment, the stator core 5 is divided and arranged adjacent to each other to form the stator core 5. However, the stator core 13 is divided into a plurality of appropriate stator magnetic poles as one unit. May be arranged adjacent to each other. In this case, there is an effect that the number of assembling steps can be reduced.

Embodiment 2 FIG. FIG. 5 shows an embodiment of the present invention.
Principal part showing the configuration of the stator core of the synchronous generator that is form 2
It is a side sectional view. In the figure, reference numeral 14 denotes a stator magnetic pole.
And the upper part created in the same manner as the stator pole plate 13a.
Extension 14a₁And the lower extension 14a_TwoStator with
The magnetic pole plates 14a are laminated and heat is applied in the same manner as the stator magnetic poles 13.
It was processed and fixed. And each adjacent
Upper extension 14a of the stator pole plate 14a ₁Bottom and bottom
Resident part 14a_TwoTo form a joint 15 having a width w.
Formed and arranged in an annular shape in a frame 3 (not shown)
The stator core 5 of the second embodiment is formed, and FIGS.
In the same manner as in_Three
And clamped to the side plate 4 via the clamper 6. What
As described above, the stator magnetic poles 14 are arranged in an annular shape.
When forming the stator core 5 according to the second embodiment,
0.3-0.5mm between each stator pole 14
Of each stator pole plate 14a such that a gap δ of
Direction dimensions are determined, and assemblability of stator core 5
It deals with deformation due to thermal expansion of the iron core due to temperature change.
You. On the other hand, a joint having a width w between adjacent stator poles 14
No. 15 is formed in the magnetic path of the stator core 5.
There is no gap, and the rotor magnetic flux passes through the joint 15 having this width w.
Spend.

The optimum value of the width w of the joint 15 can be defined as the core back length L as follows. That is,
Magnetic flux density Bc at core back length L, stator magnetic pole 1
Bc = (τ / 2) × (Bm / 2) (1) where Bm is the outer diameter of the rotor magnet and the stator core. If the length g of the gap between the inner diameters and the length Lm of the stator core is designed to be about Lm / g = 3, then an anisotropic ferrite magnet is 0.4 to 0.2.
The value is about 5T (tesla), and about 1 to 1.2T for rare earth magnets. Further, the total magnetic flux amount φ at the core back length L
Is Bc × L, and if all the magnetic fluxes at the core back length L pass through the width w of the joint portion 15, the magnetic flux density of this portion becomes Bcw = φ / w = (Bm / 2) × (τ / w) , Bcw can be designed as follows in order to make it 1.8 T or less in consideration of the magnetic saturation of the iron core. (Bm / 2) × (τ / w) <1.8 (2) Therefore, w> Bm × (τ / 3.6) (3) Also, the magnetic flux density Bc is When the position of No. 15 is provided at L / 2, the position becomes minimum, and is obtained by the following equation. Bc = (τ / L) × (Bm / 2) × 2 (4) Here, to make Bc 1.8 T or less, L is obtained by the following equation. L> Bm × (τ / 1.8) (5) By designing in this way, a synchronous generator can be obtained which effectively utilizes the magnetic flux generated by the rotor magnet without being affected by magnetic saturation. Can be

As described above, in the stator core 5 of the synchronous generator according to the second embodiment, the joint 15 having the required gap δ and the width w serving as the magnetic path of the rotor magnetic flux is formed. In addition to the excellent assemblability of the stator core 5, not only deformation due to temperature changes can be prevented, but also because there is no change in magnetic resistance, electromagnetic vibration and noise due to generation of harmonic ripples are prevented. There is an effect that the resistance does not increase and the generator output does not decrease.

Embodiment 3 FIG. 6 is a side sectional view of a main part showing a configuration of a stator core of a synchronous generator according to Embodiment 3 of the present invention. In the figure, 16 is a stator magnetic pole is laminated stator pole plate 16a having a lower extending portion 16a ₁ that fixed form by heat treatment in the same manner as the stator pole 13. Reference numeral 17 denotes a stator magnetic pole connection body. Like the stator magnetic pole plate 16a, a stator magnetic pole connection plate 17a obtained by punching a silicon steel plate having a thickness of, for example, 0.5 mm is laminated in the same manner as the stator magnetic pole 13, It is formed by heat treatment. Then, by bonding the lower surface of the lower extending portion 16a ₁ of the stator top pole connecting body 17 of the stator pole 16 adjacent to form the joint 15 of width w frame 3
(Not shown) to form a stator core 5 of the third embodiment in an annular shape, and as in FIGS. 3 and 4, pass the mounting bolt 7 through the mounting holes 16 a ₂ and 17 a ₁ . Then, it is fastened to the side plate 4 via the clamper 6.
When the stator cores 5 of the third embodiment are formed by arranging the stator magnetic poles 16 and the stator magnetic pole coupling bodies 17 in an annular shape as described above, the lower part of each of the adjacent stator magnetic poles 16 is formed. The stator magnetic pole plate 16a and the stator magnetic poles are formed such that a gap δ of about 0.3 to 0.5 mm is obtained between the extending portions 16a ₁ and between each stator magnetic pole 16 and the stator magnetic pole coupling body 17. The circumferential dimension of the connecting plate 17a is determined. By configuring the stator core 5 of the synchronous generator according to the third embodiment as described above, the same effect as in the second embodiment can be obtained.

Embodiment 4 FIG. 7 is a side sectional view of a main part showing a configuration of a stator core of a synchronous generator according to Embodiment 4 of the present invention. As illustrated, in the fourth embodiment is the second stator magnetic poles having stator pole 18 and the lower extending portion 16a ₁ is a first stator pole having an upper extending portion 18a ₁ Embodiment 2 Using stator magnetic pole 16 in Embodiment 2
The stator core 5 of the fourth embodiment is formed by annularly disposing the stator core 5 in the frame 3 (not shown) in the same manner as in FIG. 7 is fastened to the side plate 4 via the clamper 6 through the mounting holes 16a ₂ and 18a ₂ . The method of forming the stator magnetic poles 16 and 18 is the same as in the second embodiment. By configuring the stator core 5 of the synchronous generator according to the fourth embodiment as described above, the same effect as in the second embodiment can be obtained.

Embodiment 5 FIG. 8 is a side sectional view of a main part showing a configuration of a stator core of a synchronous generator according to Embodiment 5 of the present invention. In the figure, 19 is a stator poles, the stator pole plate 19a by laminating said stator poles having a engagement projection 19a ₁ and the fitting recess 19a ₂ fabricated in the same manner as the stator pole plate 13a In the same manner as in No. 13, it was heat-bonded and formed. The engagement projection 19a ₁ of the respective stator magnetic poles 19 adjacent the fitting recess 19a ₂
Are sequentially fitted in a frame 3 (not shown) to form a stator core 5 of the fifth embodiment, and mounting bolts 7 are attached to mounting holes 7 as in FIGS. 19 a ₃ , which is fastened to the side plate 4 via the clamper 6. The bonding length between the engagement projection 19a ₁ and the fitting recess 19a ₂ in this case is one-sided w / 2, that w combined two places. As described above, each stator magnetic pole 19
Are arranged in an annular shape to form the stator core 5 of the fifth embodiment, the distance between adjacent stator magnetic poles 19 is 0.3.
The circumferential dimension of each stator pole plate 19a is determined so as to obtain a gap δ of about 0.5 mm. By configuring the stator core 5 of the synchronous generator according to the fifth embodiment as described above, the same effect as in the second embodiment can be obtained.

Embodiment 6 FIG. FIG. 9 is a side sectional view of a main part showing a configuration of a stator core of a synchronous generator according to Embodiment 6 of the present invention. As shown in the figure, in the sixth embodiment, the stator magnetic poles 14 after winding are arranged in an annular shape to form the stator core 5 of the sixth embodiment, and the stator cores 5 are fastened by fastening bands 20. It is formed in an annular shape, and is mounted in the frame while being fixed by the fastening bolt 21 (not shown). By configuring the stator core 5 of the synchronous generator according to the sixth embodiment as described above, the same effects as in the second embodiment can be obtained.

Embodiment 7 FIG. 10 is a diagram illustrating a method for punching a stator core plate of a synchronous generator according to Embodiment 7 of the present invention. It is known that, when a silicon steel sheet is formed with an easy axis of magnetization in the rolling direction in the rolling process, and when the direction in which the alternating magnetic flux flows coincides with the direction of the easy axis of magnetization, the iron loss is about 10% less than in the case where it is orthogonal. ing. In the seventh embodiment, as shown, when the silicon steel plate 23 is rolled by the rolling roller 22, an easy axis of magnetization is formed in the rolling direction, and the circumferential direction of the stator core plate 13a or the stator magnetic pole connection plate 17a is formed. Is punched so as to be in the direction of the axis of easy magnetization. Needless to say, such a punching method can be applied to any of the stator core plates 13a, 14a, 16a, 18a, and 19a in the first to sixth embodiments of the present invention, and the stator core formed in this manner. By constructing the stator core using the plates, a highly efficient synchronous generator with less iron loss can be obtained.

Embodiment 8 FIG. FIG. 11 is a perspective view showing a configuration and a manufacturing method of a stator magnetic pole and a stator winding of a synchronous generator according to an eighth embodiment of the present invention, and FIG. 11 (a) is a diagram showing a stator magnetic pole main body. FIG. 11B is a diagram showing a stator winding, and FIG. 11C is a diagram showing a stator pole piece.
Reference numeral 24 denotes a stator magnetic pole main body, which is formed by, for example, punching a silicon steel plate having a thickness of 0.5 mm to form a fitting projection 24a ₁ at the tip.
The stator pole plate 24a having holes 24a ₃ attached to the core back portion 24a ₂ at the rear end and, after stacking in the same manner as the stator pole 13 is obtained by fixing formed by heat treatment.
Reference numeral 25 denotes a bobbin for stator winding, which is made of insulating resin and has a core portion 2.
5a has a flange 25b at both ends, and a core 25a and a flange 2
A core insertion hole 25c is opened at the center of 5b. The stator winding 8 is concentratedly wound around the core 25a of the stator winding bobbin 25 and is insulated together. 26 is a stator pole pieces, for example, 0.5mm thick said stator magnetic pole of the stator pole piece plate 26a of trapezoidal shape having a hole 26a ₂ mounting a fitting recess 26a ₁ by punching silicon steel plates of 24 It is formed by laminating in the same manner as described above. Then, assemble them, pre-heating the stator pole pieces 26 leave enlarged width dimension of the fitting recess 26a _1, the stator winding 8 is wound bobbin 25 of the stator winding Fitting projection 2 of stator pole body 24 inserted into iron core insertion hole 25c
4a ₁ is the fitting recess 2 of the heated stator pole piece 26
6a ₁ , cooled, shrink-fitted tightly, and impregnated with resin to ensure that it does not come off. Embodiment 8
Has a structure in which one rectangular fitting portion is provided, but a plurality of fitting portions may be provided, and the shape of the fitting portion may be trapezoidal.
The holding structure may be more robust against the electromagnetic force in the radial direction.

Since the stator magnetic poles of the synchronous generator according to the eighth embodiment of the present invention are configured as described above, the stator windings and the stator magnetic poles can be manufactured independently as separate units.
There is an effect that the synchronous generator can be manufactured with high productivity. Also,
Since the stator magnetic pole is divided into two parts and the stator magnetic pole piece 26 having a small heat capacity is heated during shrink fitting, the insulation deterioration of the stator winding 8 mounted on the stator magnetic pole main body 24 can be avoided. Further, since the stator pole piece 26 having a small heat capacity is heated, the capacity of the heating device may be small, the heating time may be reduced, and a part of the stator winding 8 may be deteriorated in insulation or burned out. When replacement is necessary, the tip of the stator pole piece 26 can be locally heated and removed with a burner or the like, so that the stator winding 8 can be easily replaced. Furthermore, since the distance between the shrink-fit joint and the gap surface receiving the electromagnetic force is short,
The moment due to the electromagnetic force applied to the stator pole piece 26 is small, and effects such as the fitting portion is not easily broken can be obtained.

Embodiment 9 FIG. 12 is a perspective view showing a configuration and a manufacturing method of a stator magnetic pole and a stator winding of a synchronous generator according to Embodiment 9 of the present invention, and FIG. 12 (a) is a diagram showing a stator magnetic pole main body. FIG. 12B is a diagram showing a stator winding, and FIG. 12C is a diagram showing a stator pole piece.
Reference numeral 27 denotes a stator magnetic pole main body, which is formed by punching a silicon steel plate having a thickness of 0.5 mm, for example, and punching a core back portion 27a at the rear end.
Stator pole plate 27a having ₁ and mounting holes 27a ₂
Are laminated in the same manner as the above-mentioned stator magnetic pole 13, and then heat-treated to form a fixed structure. The stator winding 8 and the stator winding bobbin 25 are the same as those in FIG. 11 (b). To assemble them, the stator winding bobbin 25 on which the stator winding 8 is wound is used. A resin locking plate 28 is fitted into the lower part of the stator magnetic pole main body 24 inserted into the iron core insertion hole 25c and brought into contact with the stator winding bobbin 25, immersed in the resin, and then dried and fixed. Let it. The stator magnetic pole of the synchronous generator according to the eighth embodiment of the present invention is applied when a stator pole piece is not required, and is configured and manufactured as described above. Therefore, the same effects as in the seventh embodiment are obtained. Can be obtained at low cost.

In each of the first to ninth embodiments, each stator magnetic pole is attached to the side plate 4 by the mounting bolt 7. However, instead of this, both screw bolts and tightening nuts are used. May be. That is,
One screw portion of both screw bolts is screwed and implanted in advance in the screw hole of the side plate 4, and the mounting hole of each stator magnetic pole on which the stator winding 8 is concentratedly wound is fitted into the screw screw, and the other of the screw bolts is inserted. By tightening the tightening nut to the threaded portion and tightening and fixing the stator magnetic pole via the clamper 6, the positioning and assembly of the stator magnetic pole is facilitated. When it is necessary to replace a specific stator winding 8 and disassembly / removal is required,
All clamp nuts are removed, the clamper 6 is removed, and the required stator poles can be easily removed by pulling them out axially along their screw bolts. In this case, the other stator magnetic poles do not fall because they are supported by the respective screw bolts.

After the stator windings 8 have been replaced, reassembly may be performed in accordance with the above-described assembling procedure. A special disassembly / assembly jig is not required, and a stator core having a predetermined inner diameter is used. Can be configured. Large wind turbine generator (φ2-4
m or more) (multiple poles (more than 100 poles), the weight of each stator magnetic pole is such that it can be held by hand, and it is installed in a remote area such as a cape and disassembled on a windmill tower for maintenance. If a simple scaffold, crane, etc. are installed even when assembly is required, the magnetic poles can be mounted as described above, allowing disassembly and assembly work on the windmill tower, and maintenance and failure stators. There is an effect that a wind power generator whose windings can be easily replaced is obtained.

[0025]

The present invention is configured as described above.
The following effects are obtained. Since the stator magnetic poles formed individually and the stator windings are concentratedly wound are combined in an annular shape and individually removably with each other to form a stator core and arranged in a frame, the diameter is large. Even with the stator core, the roundness of the air gap surface can be easily and accurately obtained, and the stator core can be disassembled and assembled for each stator magnetic pole. Replacement of a defective product can be easily performed. Accordingly, it is possible to obtain a wind power generator that can be disassembled and assembled on the wind turbine tower and that can easily perform maintenance and replacement of the failed stator winding. Also, the upper extension portion and the lower extension portion of the stator magnetic pole are joined to each other, the lower extension portion of the stator magnetic pole is joined to the surface of the stator magnetic pole joint, or the stator magnetic pole is fitted to the projection. Since the stator core is formed by joining by fitting with the fitting recess, generation of electromagnetic vibration and noise and reduction in generator output due to increase in magnetic resistance are prevented.

In addition, since a required circumferential gap is provided between adjacent stator poles combined with each other,
The assemblability of the stator core is improved, and the deformation of the stator core due to thermal expansion based on a temperature change after assembly is prevented. In addition, since the stator magnetic poles are configured so that the stator magnetic pole body and the stator magnetic poles can be detached from each other, the stator magnetic poles and the stator windings to be mounted can be manufactured separately as separate bodies and synchronized. The generator can be manufactured with high productivity, and replacement of a faulty product can be easily performed. Furthermore, since the stator magnetic poles or the stator magnetic pole coupling body constituting the stator core are formed by punching and laminating a silicon steel plate having an easy axis of magnetization in the circumferential direction, a highly efficient synchronous generator with less iron loss Is obtained.

Further, the stator magnetic poles and the stator windings are independently manufactured separately from each other, and the stator magnetic poles are annularly and individually formed with the stator windings incorporated in the stator magnetic poles. Since the stator cores are formed so as to be removably combined with each other, the synchronous generator can be manufactured with high productivity.

[Brief description of the drawings]

FIG. 1 is a front sectional view of a main part of a wind turbine generator to which a synchronous generator according to the present invention is applied.

FIG. 2 is a side sectional view showing a configuration of a stator core of the synchronous generator according to Embodiment 1 of the present invention.

FIG. 3 is a front sectional view around a stator core of the synchronous generator in FIG. 1;

FIG. 4 is a side view as seen in the direction of arrow A in FIG. 3;

FIG. 5 is a side sectional view of a main part showing a configuration of a stator core of a synchronous generator according to Embodiment 2 of the present invention.

FIG. 6 is a side sectional view of a main part showing a configuration of a stator core of a synchronous generator according to Embodiment 3 of the present invention.

FIG. 7 is a side sectional view of a main part showing a configuration of a stator core of a synchronous generator according to Embodiment 4 of the present invention.

FIG. 8 is a side sectional view of a main part showing a configuration of a stator core of a synchronous generator according to a fifth embodiment of the present invention.

FIG. 9 is a side sectional view of a main part showing a configuration of a stator core of a synchronous generator according to Embodiment 6 of the present invention.

FIG. 10 is a diagram illustrating a method for punching a stator core plate of a synchronous generator according to a seventh embodiment of the present invention.

FIG. 11 is a perspective view showing a configuration and a manufacturing method of a stator magnetic pole and a stator winding of a synchronous generator according to an eighth embodiment of the present invention, wherein (a) is a diagram showing a stator magnetic pole main body, b)
FIG. 3 is a diagram showing a stator winding, and FIG. 3C is a diagram showing a stator pole piece.

12A and 12B are perspective views illustrating a configuration and a manufacturing method of a stator magnetic pole and a stator winding of a synchronous electric machine according to Embodiment 9 of the present invention, wherein FIG. () Is a diagram showing a stator winding, and (c) is a diagram showing a stator pole piece.

[Explanation of symbols]

3: Frame 4: side plate 5: stator core 6: damper 7: mounting bolt 8: stator winding 13,14,16,18,19: stator poles 14a _1, 18a _1: upper extending portion 14a _2, 16
a ₁ : Lower extension 15: Joint 17: Stator pole joint 19 a ₁ : Fitting protrusion 19 a ₂ : Fitting recess 20: Fastening band 24: Stator pole main body 26: Stator pole piece g: Air gap

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Mitsuhiro Kawamura, 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Mitsui Electric Co., Ltd. (72) Takashi Matsushita 2-3-2, Marunouchi, Chiyoda-ku, Tokyo F term in Mitsubishi Electric Corporation (reference) 5H002 AA04 AB01 AB06 AC03 AC08 5H621 GA01 GA04 GA11 HH01 JK03

Claims (11)

[Claims] 1. A synchronous rotating electric machine having a stator winding concentratedly wound for each stator magnetic pole of a stator core arranged in a frame, wherein the stator magnetic poles are individually formed by a silicon steel sheet laminate. The synchronous rotating electric machine is formed, wherein the stator core is formed by combining the stator magnetic poles in an annular shape and individually removably. 2. The stator magnetic pole has an upper extension extending in one direction in the circumferential direction and a lower extension extending in the other direction, and the upper extension between adjacent stator poles is provided. The synchronous rotating electric machine according to claim 1, wherein a lower surface of the portion and an upper surface of the lower extension portion are joined. 3. The stator magnetic pole has a first stator pole having an upper extension extending on both sides in the circumferential direction and a second stator having a lower extension extending on both sides in the circumferential direction. 2. The magnetic head according to claim 1, further comprising a magnetic pole, wherein a lower surface of the upper extending portion and an upper surface of the lower extending portion of the adjacent first and second stator magnetic poles are joined. Synchronous rotating electric machine. 4. The stator magnetic pole has a pair of lower extending portions extending on both sides in the circumferential direction, and a silicon steel plate is laminated on the upper surface of the lower extending portion of the adjacent stator magnetic pole. 2. The synchronous rotating electric machine according to claim 1, wherein the lower surfaces of the stator magnetic pole coupling bodies are joined. 5. The stator magnetic pole has a fitting protrusion on one side in the circumferential direction and a fitting recess on the other, and the fitting protrusion and the fitting recess of the adjacent stator magnetic pole are mutually connected. The synchronous rotating electric machine according to claim 1, wherein the synchronous rotating electric machine is formed so as to be fitted to the rotating electric machine. 6. The synchronous rotation according to claim 1, wherein a required gap is provided in the circumferential direction between adjacent stator poles combined with each other. Electric machine. 7. The synchronous rotating electric machine according to claim 1, wherein an outer periphery of the stator core is fastened by a fastening band. 8. The stator magnetic pole according to claim 1, wherein the stator magnetic pole is constituted by a stator magnetic pole main body and a stator magnetic pole piece detachably connected to each other. The synchronous rotating electric machine as described. 9. A stator magnetic pole or a stator magnetic pole connected body constituting a stator core is formed by punching and stacking a silicon steel plate having an axis of easy magnetization in a circumferential direction thereof. A synchronous rotating electric machine according to any one of claims 1 to 8. 10. A wind generator using the synchronous rotating electric machine according to claim 1. Description: 11. A method for manufacturing a synchronous rotating electric machine having a stator winding concentratedly wound for each stator magnetic pole of a stator core disposed in a frame, wherein the stator magnetic poles are manufactured separately. The step of manufacturing a stator winding that is concentratedly wound for each of the stator magnetic poles, incorporating the stator winding into the stator magnetic poles, and taking out the stator magnetic poles in an annular shape and individually. A method for manufacturing a synchronous rotating electric machine, comprising a step of forming the above-mentioned stator core by being combined with each other as much as possible.