JP2003304656A - Stator structure of dynamo-electric machine and method of manufacturing stator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a compact stator structure, which improves the recycle property by facilitating the separation for recovery between an iron core and an exciting coil and facilitates assembling between the exciting coil and the iron core and is superior in iron core performance by minimizing the stress on the iron core, concerning the stator of a motor or a generator, and a method of manufacturing this stator. <P>SOLUTION: A plurality of exciting coils, where teeth insertion holes are made at their air-core parts, are arranged in the circumferential direction, and they are molded into a block form via insulating resin, and substantially T-shaped electromagnetic steel plates are inserted into the teeth insertion holes of this exciting coil block, and the electromagnetic steel plates adjacent to each other in the circumferential direction are coupled to each other outside the exciting coil block so as to form a yoke. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a structure and a manufacturing method of a stator of an electric motor or a generator,
More specifically, by separating the iron core of the stator from the exciting coil and assembling the exciting coil before the iron core,
The present invention relates to a stator structure capable of improving a manufacturing process, iron loss characteristics, and recyclability of an iron core and an exciting coil.

[0002]

2. Description of the Related Art Conventionally, for example, as a stator structure for constructing an electric motor, (1) after forming an iron core, an exciting coil is inserted into a slot from a gap formed between teeth tips of each iron core to form a tooth. There is a structure in which the exciting coil is wound, and (2) a structure in which the exciting coil is wound around the teeth of the divided iron core divided into a plurality of pieces, and then the divided iron core is assembled and the joint surface is fixed by welding or adhesion. In the method (1), since the exciting coil is inserted into the slot through the narrow gap, the filling efficiency of the exciting coil is low and the copper loss becomes large. Further, when disassembling, since the exciting coil is press-fitted between the teeth of the iron core as a result, it is difficult to separate and collect the iron core and the exciting coil, and there is a problem of poor recyclability. The method (2) has a problem that although the winding filling efficiency is high, the split iron core has low rigidity and vibration is likely to occur. Also,
At the time of disassembly, since the exciting coil is fixed to the tooth as a result, it is difficult to separate and collect the iron core and the exciting coil, and there is a problem of poor recyclability.

Another stator having a structure is disclosed in Japanese Patent Laid-Open No. 62-
118733, JP-A-5-252700,
In Japanese Patent Laid-Open No. 6-22508, for example, FIG.
As shown in Fig. 4, a yoke core a and four teeth parts b with a gap between them are separably joined to form a stator iron core, and a resin is provided in a gap between the yoke parts a and the teeth part b. Molding is performed to form a mold portion d having a winding frame portion c for winding the exciting coil, and as shown in FIG. 12 (b), after separating from the yoke portion, the exciting coil e is applied to the winding frame portion c.
12C, the stator obtained by rejoining the mold portion d in which the exciting coil e is wound around the winding frame portion c and the tooth portion b in the coupled state to the yoke portion a as shown in FIG. 12C. A structure is also proposed. However, in these stator structures, since the exciting coil is fixed to the iron core as a result, there is a problem that it is difficult to separate and collect the exciting coil and the iron core and the recyclability is poor. In addition, since the teeth and the yoke that form the stator core are separated and rejoined, fitting, welding, and caulking are required.In this case, the stress applied to the core and the iron loss due to short-circuiting between layers increase There are problems such as easy to do.

[0004]

DISCLOSURE OF THE INVENTION The present invention relates to a stator of an electric motor or a generator, facilitates the separation and recovery of the iron core and the exciting coil, improves the recyclability thereof, and facilitates the assembly of the exciting coil and the iron core. It is an object of the present invention to provide a compact stator structure having excellent iron core performance by minimizing the stress on the iron core and a manufacturing method of this stator.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention has the following points (1) to (9). (1). In a stator of a rotating electric machine comprising an iron core having a plurality of teeth formed by stacking a plurality of exciting coils and electromagnetic steel sheets and a substantially cylindrical yoke, the exciting coils are arranged in a circumferential direction, and an air core of the exciting coil is provided. A tooth insertion hole is provided in the portion, and a substantially T-shaped electromagnetic steel plate is inserted into the teeth insertion hole in an excitation coil block integrally molded of a resin having an electric insulation property, and adjacent teeth are provided outside the excitation coil block. A stator structure for a rotary electric machine, characterized in that a yoke is formed by circumferentially connecting to an electromagnetic steel plate inserted in an insertion hole. (2). In a stator of a rotating electric machine comprising an iron core having a plurality of teeth formed by stacking a plurality of exciting coils and electromagnetic steel sheets and a substantially cylindrical yoke, the exciting coils are arranged in a circumferential direction, and an air core of the exciting coil is provided. A tooth insertion hole is provided in the portion, and a substantially T-shaped electromagnetic steel plate is inserted into the teeth insertion hole in the excitation coil block integrally molded with a resin having electric insulation, and the electromagnetic steel plate is attached outside the excitation coil block. A stator structure for a rotary electric machine, characterized in that a yoke is formed by circumferentially connecting to an electromagnetic steel plate inserted in an adjacent tooth insertion hole via a yoke.

(3). In (1) or (2),
The connection positions of the electromagnetic steel plates connected in the circumferential direction are staggered in the stacking direction, and these positions are repeated in the stacking direction to overlap the steel plates adjacent in the stacking direction and facing each other in the circumferential direction. A stator structure for a rotating electric machine, wherein: (4). In any one of (1) to (3), a stator structure for a rotating electric machine, characterized in that an electrically insulating substance is filled between the exciting coil block and the iron core. (5). In any one of (1) to (4), a fixing frame is attached to the exciting coil block, the exciting coil and the iron core are fixed, and the fixing frame can be attached to and detached from the structure of the rotating electric machine or the like. Characteristic rotating machine stator structure. (6). In (5), the stator structure of the rotating electric machine is characterized in that the fixed frame is provided with a cooling promoting function such as a fluid cooling pipe or an air cooling fin. (7). In any one of (1) to (4), a stator structure for a rotating electric machine, characterized in that the rotor magnetic pole position detection coil is formed integrally with the exciting coil block together with the exciting coil. (8). In any one of (1) to (4), a stator structure of a rotating electric machine, characterized in that the current lead wire, the connecting portion, and the current introducing terminal portion are integrally formed with the exciting coil in the exciting coil block.

(9). In a stator of a rotary electric machine that includes an iron core having a plurality of teeth formed by laminating a plurality of exciting coils and electromagnetic steel sheets and a substantially cylindrical yoke, a winding having a surface insulating layer is formed by using a winding jig. The coil is wound and formed into a predetermined shape to form an exciting coil, and a plurality of these exciting coils are arranged side by side in the circumferential direction in a substantially cylindrical mold frame, and a mold jig is inserted into the air core part to The insulating resin is poured into the frame to solidify it, and then the mold jig and the frame are removed to form an exciting coil block containing multiple exciting coils with teeth insertion holes in the air core. Inserting the electromagnetic steel sheets laminated in the holes and joining or joining the electromagnetic steel sheets that are adjacent in the circumferential direction to form a yoke and attach the fixing frame to fix the excitation coil block and the iron core. Characterized by Method of manufacturing a rotary electric machine stator.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention is based on the concept of reversal, in which the concept of winding an exciting coil around an iron core is changed, the exciting coil is first assembled into a block, and the iron core is fitted into the exciting coil block. Yes, it facilitates the assembly of the stator, minimizes the stress applied to the iron core to prevent iron loss deterioration, and secures the rigidity and heat removal characteristics of the stator, and facilitates the separation of the iron core and the exciting coil during recycling. It is possible to In the structure of the stator of the present invention, on the excitation coil side, a plurality of pre-formed excitation coils are arranged in the circumferential direction, the iron core teeth insertion holes are provided in the air core portion, and the resin having electrical insulation is provided. It is integrally molded into a block shape through. When the exciting coil is formed in this way, it is possible to improve the filling factor and formability of the winding without straining the iron core, reduce copper loss, and improve the rigidity and thermal conductivity of the exciting coil. Can be improved. Also, winding and wiring are done before installing the iron core,
Since it is possible to form one component by resin molding, the work efficiency of assembling the stator can be improved. The winding forming the exciting coil needs to have an insulating layer on the surface, but the cross-sectional shape is not limited to a circular shape and may be a square shape. The rigidity and heat conductivity of the exciting coil can be improved by the molding resin penetrating between the windings. Further, when forming the exciting coil block, the rotor magnetic pole position detecting coil wound around the teeth of a specific electric phase can be integrated with the exciting coil and can be utilized for sensorless control of the electric motor.

On the other hand, the iron core comprises a plurality of teeth formed by laminating electromagnetic steel plates and a substantially cylindrical yoke, and a substantially T-shaped electromagnetic steel plate is inserted into the teeth insertion hole of the exciting coil block. The yoke is formed by circumferentially connecting the electromagnetic steel plates inserted in the adjacent tooth insertion holes to the outside of the exciting coil block. A known steel sheet can be used for the electromagnetic steel sheet constituting the iron core, but when a steel sheet having magnetic anisotropy such as a grain-oriented electromagnetic steel sheet is used, the easy magnetization direction of the steel sheet is defined as the flowing direction of the magnetic flux in the iron core. It is preferable to align them. The shape of the electromagnetic steel sheet is a substantially T-shape in which the width of the portion remaining outside the exciting coil block is wider than the tooth width so that the tip positions of the teeth are aligned when inserted into the tooth insertion hole. From the viewpoint of the assembly work efficiency of the stator, it is preferable to stack an arbitrary number of electromagnetic steel sheets so that the width direction of the teeth and the tips of the teeth are aligned before inserting the electromagnetic steel sheets into the tooth insertion holes. It is preferable to avoid the methods such as welding, fitting, and caulking, which may adversely affect the iron core performance, and lightly bond between the laminated electromagnetic steel sheets. The shape of the teeth and the yoke can be selected as desired, for example, a known shape,
In order to increase the filling efficiency of the teeth insertion hole, it is preferable that the teeth have a uniform width or a shape in which the teeth are narrowed from the base of the teeth toward the tip facing the rotor. In the yoke, a substantially T-shaped electromagnetic steel plate inserted in the tooth insertion hole of the exciting coil block may be directly joined to the electromagnetic steel plates adjacent to each other in the circumferential direction outside the exciting coil block, or may have a different shape therebetween. Alternatively, they may be magnetically coupled by being joined via an electromagnetic steel plate. Basically, the electromagnetic steel plates are joined by meshing the yoke in the radial direction of the stator, that is, in the direction opposite to the tips of the teeth. It is preferable that the angle is between the angles formed by the teeth of the adjacent electromagnetic steel plates sandwiching the part.

As a method of joining electromagnetic steel sheets adjacent to each other in the circumferential direction, basically, welding, fitting, caulking, etc., which may adversely affect the performance of the iron core, are avoided, and the joining is simplified and stabilized. In order to facilitate the formation of the exciting current in the joint, the connection positions of the electromagnetic steel plates are arranged staggered in the stacking direction, and this position is repeated in the stacking direction, and the adjacent steel plates facing each other in the circumferential direction are arranged. A step wrap connection that forms an overlap between is preferred. At this time, in order to improve the rigidity of the iron core and prevent the occurrence of vibration, it is preferable to use bonding together with the joining of the electromagnetic steel plates, but use light bonding so that separation during dismantling does not become difficult. Is preferred. Since the iron loss is increased by the eddy current, it is preferable to form an insulating film at the portion where the exciting coil is in contact with the electromagnetic steel sheet. The insulating film may be formed by disposing a tubular insulating resin on the inner surface of the air core of the exciting coil, or by filling the resin on the inner surface of the air core portion during molding.
It is preferable to fill the gap with a filler such as a resin in order to improve the adhesion between the tooth insertion hole and the electromagnetic steel sheet, prevent the occurrence of vibration, and improve the thermal conductivity. In order to prevent an electrical short circuit at the end surface of the iron core, it is preferable that the filling material has electrical insulation. In this way, the electromagnetic steel plates are inserted into the teeth insertion holes, the electromagnetic steel plates are connected outside the exciting coil block, and then the fixing frame is attached to the outside to fix the exciting coil block and the iron core to each other to form the stator. be able to. The shape and mounting method of the fixed frame are preferably those taking into consideration the disassembling method at the time of disassembly. The stator can be removably attached to the structure of the rotary electric machine including the bearing of the rotor via the fixing frame. The fixing frame is brought into contact with the exciting coil block and the iron core, and the fixing frame is provided with a cooling promoting function such as a water cooling pipe or an air cooling fin, so that heat removal from the stator can be facilitated.

As a method of manufacturing the stator of the present invention, there are, for example, the following manufacturing methods. (1). Insulation tube is wound from the winding jig after winding the conductive wire with the surface insulation layer through the insulation tube (resin film) around the winding jig formed to the size of the teeth of the iron core Along with removing the exciting coil, the multiple exciting coils created in this way are arranged side by side in the circumferential direction in a substantially cylindrical mold, and a mold jig is inserted into the air core to insulate the mold inside. After pouring the resin into solidification and then solidifying it, the mold jig and the frame are removed to form an exciting coil block that has a plurality of exciting coils with teeth insertion holes in the air core. The electric steel plate is inserted, and the electromagnetic steel plates adjacent in the circumferential direction are directly joined or joined via the electromagnetic steel plate to form a yoke, and a fixing frame is attached to fix the exciting coil block and the iron core. (2). A conductive wire having a surface insulating layer was wound around a winding jig having a cross section slightly larger than the teeth of the iron core, formed into a predetermined shape, and then the exciting coil was pulled out from the winding jig, thus being created. A plurality of exciting coils are arranged side by side in the circumferential direction in a substantially cylindrical mold, and a mold is inserted through an insulating resin spacer that secures a space for resin to enter the air core part. Insulating resin is poured into and solidified, and then by removing the mold jig and frame,
Forming an exciting coil block that has a plurality of exciting coils with teeth insertion holes in the air core part, insert laminated electric steel plates into the teeth insertion holes, and directly bond adjacent electromagnetic steel plates in the circumferential direction or further A method in which a yoke is formed by joining via electromagnetic steel plates, and a fixing frame is attached to fix the exciting coil block and the iron core. There is.

In the stator structure of the present invention, when disassembling, for example, a fixed frame is removed, and a pressing body that moves forward and backward by fluid pressure is placed in the rotor arrangement space after removing the rotor from the teeth of the exciting coil block. By the pressing device radially arranged corresponding to the tip positions of the teeth inserted in the insertion holes, the teeth can be pushed out from the inside and the iron core can be easily separated from the exciting coil block and collected.
Also, the exciting coil block separated from the iron core can be separated from the resin layer separately by a known method or the like to easily collect the winding.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the stator structure of the present invention will be described with reference to FIGS. Example 1 is a case where the present invention is applied to a stator structure of a synchronous electric motor formed by an exciting coil 2 and a stator iron core 6 including a tooth 6t and a yoke 6y formed by punching out laminated electromagnetic steel sheets. belongs to. In FIGS. 1A and 1B, reference numeral 1 denotes an exciting coil block, which has a rotor (not shown) arrangement space 7 in the central portion and has a donut-shaped plane. In this exciting coil block 1, a plurality of exciting coils 2 having a tooth insertion hole 4 into which a tooth portion 6t of an electromagnetic steel plate 6 is inserted are radially arranged and are formed in a block shape with an insulating resin 3 interposed therebetween. It is a thing. An insulating film 5 is formed on the hole surface of the tooth insertion hole 4 so as not to cause a short circuit with the exciting coil 2 when the tooth portion 6t is inserted. As shown in FIGS. 2A, 2 </ b> B, and 2 </ b> C, the electromagnetic steel plates 6 into which the teeth portions 6 t are inserted in the teeth insertion holes 4 of the exciting coil block 1 are laminated with the teeth width and the teeth tips aligned. , The adhesive liquid permeates from the laminated end surface, and is lightly adhered.

As shown in FIGS. 3 (a) and 3 (b), the electromagnetic steel plate 6 is provided with teeth 6 in the teeth insertion holes 4 of each exciting coil 2 formed in the exciting coil block 1.
The exciting coil block 1 and the stator core 6 are joined by inserting the t portion and joining the adjacent yoke portions 6y. When the tooth portion 6t is inserted into the tooth insertion hole 4, the gap between the tooth portion 6t and the insulating film 5 on the hole surface of the tooth insertion hole 4 is filled with the insulating resin 3 to form the tooth insertion hole 4 and the tooth portion. The adhesion of 6 tons is enhanced to prevent the occurrence of vibration and improve the thermal conductivity.
As a method of joining the yoke portions 6y adjacent to each other in the circumferential direction, here, as shown in FIG. 4 (c), the connection positions of the electromagnetic steel plates are arranged in a staggered manner in the stacking direction, and this position is arranged in the stacking direction. Repeatedly, step lap joining is adopted so as to form an overlapping portion between the steel plates that are adjacent in the stacking direction and face each other in the circumferential direction. With such a joining method, the joining can be facilitated, the joining can be stabilized, and the exciting current can be smoothly formed in the joined portion. In this way, the exciting coil block 1 and the electromagnetic steel plate 6 can be fixed to obtain a stator structure, but in order to make the rigidity of the structure and the mounting performance of the rotating electric machine to the structure more stable, for example, , FIG. 5 (a), (b)
It is desirable to assemble the fixed frame 8 on the outside as shown in FIG. The fixed frame is fixed to the exciting coil block and has a function of fixing the iron core. Further, by incorporating the water cooling pipe 16 in the fixed frame, the heat removal performance from the stator can be improved.

Regarding an example of a method of manufacturing the stator of the present invention,
A description will be given based on FIGS. 6 to 9. First, an example of a method of manufacturing the exciting coil block 1 will be described. FIG. 6 (a),
In (b), 9 is a mold for obtaining the excitation coil block 1, which is composed of a lower frame 9a and an upper frame 9b, and is a mold jig for forming the tooth insertion holes 4 in the lower frame 9a and the upper frame 9b, respectively. A plurality of holes for setting 10 are provided in the circumferential direction, and the mold jig 10 is provided in the air core of the exciting coil 2 through the insulating film 5 in the holes formed in the lower frame 9a and the upper frame 9b. The insulating resin 3 is set so as to pass through, and the insulating resin 3 is poured into the mold 9 to be solidified. The shape of the die jig 10 is adjusted so that the shape of the tooth insertion hole after the resin is solidified is substantially the same as the cross section of the tooth portion 6t of the laminated electromagnetic steel sheet 6.
The resin has such a surface property that it is easily released from the mold. The exciting coil is the winding jig 1 shown in FIGS. 7 (a), 7 (b) and 7 (c).
The winding is wound by using 1, and the winding is shaped so that the filling factor of the winding is high and the adjacent exciting coils do not interfere with each other when arranged in the exciting coil block. The exciting coil 2 removed from the winding jig 11 is shown in FIG.
The insulating film 5 is shaped in the shape shown in (b) and (c), and the insulating film 5 is provided on the air-core portion.

By injecting the insulating resin 3 into the mold 9 and solidifying it, the mold jig 10 is pulled out from the mold 9 with the insulating film 5 left, and the mold 9 is removed.
It is possible to form the exciting coil block 1 including the plurality of exciting coils 2 having the tooth insertion holes 4 in the air core portion as shown in (a), (b) and (c). As shown in FIGS. 2 to 5, the tooth portions 6t of the electromagnetic steel plate 6 are inserted into the exciting coil block 1 thus obtained, the yoke portions 6y adjacent in the circumferential direction are joined, and the fixed frame 8 is fixed. By assembling, the stator can be manufactured.

In the stator structure of the present invention,
When disassembling, for example, by removing a rotor (not shown) and removing the fixed frame 8 in the rotor arrangement space 7, by a pressing body 14 and a pressing device 15 that move forward and backward by fluid pressure as shown in FIG. Teeth insertion hole 4 of exciting coil block 1
It is possible to easily separate the electromagnetic steel plate 6 from the exciting coil block 1 and collect it by pushing out the tooth portion 6t inserted into the electromagnetic coil block 1. In addition, the exciting coil 2 can be separately separated from the insulating resin layer 3 by a known method and easily collected.

Here, the yoke portion 6y of the electromagnetic steel plate 6 inserted into the adjacent tooth insertion hole 4 of the exciting coil block 1 is joined outside the exciting coil block 1 to form a yoke. As shown in FIG. 5, a yoke may be formed by connecting them via different electromagnetic steel plates 6y '. In FIG. 10, the electromagnetic steel plates 6y ′ are connected to the four electromagnetic steel plates 6, but the number of electromagnetic steel plates to be connected is not limited. The present invention is not limited to the first embodiment. For example, although the first embodiment is applied as a stator of an inner rotor type synchronous motor, it is also applicable as a stator of an outer rotor type synchronous motor as shown in FIGS. 11 (a) and 11 (b). Also, it can be applied as a stator of other types of electric motors and generators. In addition, the shape and manufacturing method of the exciting coil block (including the form and jig, the cross-sectional shape and diameter of the winding, the shape and arrangement of the exciting coil, the shape and joining structure of the teeth and yoke of the electromagnetic steel plate, the fixing The frame structure, the method of disassembling the exciting coil and the stator core, and the like are changed within the scope of satisfying the claims according to the type and capacity of the electric motor or generator.

[0019]

According to the present invention, a plurality of exciting coils, each having an iron core tooth insertion hole formed in the air core portion, are arranged in the circumferential direction in advance and are formed in a block shape through an insulating resin. Since the electromagnetic steel plate is inserted into the tooth insertion hole of the block to form the stator, the electromagnetic steel plate (iron) can be pulled out from the exciting coil block during disassembly.
And the exciting coil (copper) can be easily separated and recovered, and the recyclability thereof can be improved. In addition, the iron core and the excitation coil block are reinforced with rigidity through the insulating resin layer,
By distributing the stress on the iron core to the exciting coil block, it is possible to realize a compact stator structure with excellent iron core performance, reduce vibration and noise, and
The heat transfer between the exciting coil and the iron core can be improved and the heat removal characteristics can be improved. When the exciting coil is formed in this way, the packing factor of the winding can be increased without adding strain to the iron core, and the rigidity and thermal conductivity of the exciting coil can be improved and copper loss can be reduced. You can
In addition, since the winding and the wiring can be performed before the iron core is incorporated and integrated into one component, the work efficiency of assembling the rotating electric machine can be improved.

[Brief description of drawings]

1A is a partially cutaway plan view of an exciting coil block according to an embodiment of the present invention, and FIG. 1B is a partially cutaway cross sectional view taken along the line Aa-Ab of FIG. 1A.

2A is a plan explanatory view of a stator core according to an embodiment of the present invention, FIG. 2B is a front explanatory view of FIG. 2A,
(C) figure is a side surface explanatory view of (a) figure.

3 (a) is a diagram showing the excitation coil block of FIG. 1 and FIG.
Partly cutaway sectional explanatory view showing the assembled state of the stator of
(B) figure is front explanatory drawing of (a) figure.

FIG. 4 is a view showing a joint portion (A in FIG.
(Part)) is a front partial explanatory view showing a joining example, (a) is a butt joining example, (b) is a lap joining example, and (c) is a step joining example.

5A is an explanatory plan view showing a state where a fixing frame is assembled to the stator obtained as shown in FIG. 3, and FIG.
The figure is a partially cutaway front explanatory view of the diagram (a).

6A is a partially cutaway plan view showing an example of a method of manufacturing the excitation coil block of FIG. 1, and FIG. 6B is a view of FIG.
Explanatory drawing which shows the Aa-Ab arrow partly cutaway.

7A is a front explanatory view showing an example of a winding jig of an exciting coil, FIG. 7B is a plan explanatory view of FIG. 7A, and FIG.
The figure is a side explanatory view of the figure (b).

8A is a front explanatory view showing a state in which an exciting coil is wound and then removed by the jig shown in FIG. 7, and FIG.
The plane explanatory drawing of (a) figure, the side explanatory drawing of (c) figure.

9A is a partially cutaway plan view showing an example of an iron core drawing method in the stator shown in FIG. 3, and FIG. 9B is a sectional view taken along the line Aa-Ab in FIG. 9A.

FIG. 10 (a) is a partially cutaway cross-sectional explanatory view showing another structural example (yoke split structural example) of the iron core according to the present invention,
(B) figure is front explanatory drawing of (a) figure.

11A is a partially cutaway cross-sectional explanatory view showing another structural example (outer rotor type stator structural example) of the iron core according to the present invention, and FIG. 11B is a front explanatory view of FIG. 11A. Fig.

FIG. 12A is an explanatory plan view showing an example of a state in which a tooth portion, a yoke portion, and a mold portion of a conventional stator are joined together;
Figure (b) is a plan view showing a state in which the tooth portion coupled to the mold portion is separated from the state shown in Figure (a) and the exciting coil is wound, and Figure (c) shows the exciting coil shown in Figure (b). The front explanatory view showing the state where the wound teeth part was rejoined to the yoke part.

[Explanation of symbols]

1 Exciting Coil Block 2 Exciting Coil 3 Insulating Resin Layer 4 Teeth Inserting Hole 5 Insulating Film 6 Electromagnetic Steel Sheet 6t Teeth 6y, 6y ′ Yoke 7 Rotor Arranging Space 8 Fixed Frame 8a Fixed Frame (Lower Frame) 8b Fixed Frame (Upper) Frame 8c Fixed frame (peripheral frame) 9 Form 9a Form (lower frame) 9b Form (upper frame) 10 Form jig 11 Winding jig 12 Winding portion 13 Mounting hole 14 Pressing body 15 Pressing device 16 Cooling Tube 17 Excitation coil current terminal 18 Phase detection coil voltage end (conventional example) a Yoke part b Teeth part c Winding frame d Mold part e Excitation coil

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Takeaki Wakisaka             20-1 Shintomi, Futtsu-shi, Chiba Nippon Steel shares             Company Technology Development Division F-term (reference) 5H002 AA07 AA08 AB06 AC00 AE08                 5H604 AA08 AA10 BB01 BB14 CC01                       CC05 CC13 DA13 DB01 PB03                 5H615 AA01 AA03 BB01 BB14 PP01                       PP07 PP08 PP13 QQ26 RR01                       SS15 TT03 TT04

Claims (9)

[Claims] 1. A stator of a rotary electric machine comprising an iron core having a plurality of teeth formed by laminating a plurality of exciting coils and electromagnetic steel sheets and a substantially cylindrical yoke, wherein the exciting coils are arranged in a circumferential direction. A tooth insertion hole is provided in the air-core part of the exciting coil, and a substantially T-shaped electromagnetic steel plate is inserted into the tooth inserting hole in the exciting coil block integrally molded with an electrically insulating resin, and the outside of the exciting coil block is inserted. A stator structure for a rotary electric machine, characterized in that a yoke is formed by circumferentially connecting to an electromagnetic steel plate inserted into an adjacent tooth insertion hole. 2. In a stator of a rotary electric machine comprising an iron core having a plurality of teeth formed by laminating a plurality of exciting coils and electromagnetic steel sheets and a substantially cylindrical yoke, the exciting coils are arranged in a circumferential direction, A tooth insertion hole is provided in the air-core part of the exciting coil, and a substantially T-shaped electromagnetic steel plate is inserted into the tooth inserting hole in the exciting coil block integrally molded with an electrically insulating resin, and the outside of the exciting coil block is inserted. Then, a stator structure of a rotating electric machine is characterized in that a yoke is formed by being circumferentially connected to an electromagnetic steel sheet inserted in an adjacent tooth insertion hole via an electromagnetic steel sheet. 3. The electromagnetic steel plates connected in the circumferential direction are arranged such that the connecting positions are staggered in the stacking direction, and these positions are repeated in the stacking direction to form steel plates that are adjacent in the stacking direction and face each other in the circumferential direction. The stator structure for a rotary electric machine according to claim 1 or 2, wherein an overlapping portion is formed between the two. 4. The stator structure for a rotary electric machine according to claim 1, wherein an electrically insulating substance is filled between the exciting coil block and the iron core. 5. A fixed frame is attached to the exciting coil block,
The stator of a rotating electric machine according to any one of claims 1 to 4, wherein the exciting coil block and the iron core are fixed and detachable to a structure or the like of the rotating electric machine via the fixing frame. Construction. 6. The stator structure for a rotating electric machine according to claim 5, wherein the fixed frame is provided with a cooling promoting function such as a fluid cooling pipe or an air cooling fin. 7. The stator structure for a rotary electric machine according to claim 1, wherein the rotor magnetic pole position detection coil is integrally formed with the exciting coil in the exciting coil block. 8. The exciter coil, a current lead wire, a connecting portion, and a current introducing terminal portion are integrally formed with the exciter coil block, as claimed in any one of claims 1 to 4.
The stator structure of the rotating electric machine according to the item. 9. A method of manufacturing a stator for a rotary electric machine, comprising a plurality of exciting coils, a plurality of teeth formed by laminating electromagnetic steel sheets, and an iron core having a substantially cylindrical yoke, and using a winding jig. A winding having a surface insulating layer is wound and formed into a predetermined shape to form an exciting coil. A plurality of these exciting coils are arranged side by side in the circumferential direction in a substantially cylindrical form frame, and the air core is placed in the air core part. Excitation coil with multiple excitation coils with teeth insertion holes in the air core part by inserting a mold jig and pouring insulating resin into the mold to solidify it, and then removing the mold jig and mold Forming blocks,
The laminated electromagnetic steel sheets are inserted into the teeth insertion holes, and the electromagnetic steel sheets that are adjacent in the circumferential direction are joined or joined through the electromagnetic steel sheets to form a yoke, and the fixing frame is attached to the exciting coil block and the iron core. A method for manufacturing a stator of a rotary electric machine, characterized in that the stator is fixed.