CN109661759B - Stator of rotating electric machine and method for manufacturing stator of rotating electric machine - Google Patents
Stator of rotating electric machine and method for manufacturing stator of rotating electric machine Download PDFInfo
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- CN109661759B CN109661759B CN201780053244.8A CN201780053244A CN109661759B CN 109661759 B CN109661759 B CN 109661759B CN 201780053244 A CN201780053244 A CN 201780053244A CN 109661759 B CN109661759 B CN 109661759B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/02—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/08—Forming windings by laying conductors into or around core parts
- H02K15/095—Forming windings by laying conductors into or around core parts by laying conductors around salient poles
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/46—Fastening of windings on the stator or rotor structure
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
- Manufacture Of Motors, Generators (AREA)
- Insulation, Fastening Of Motor, Generator Windings (AREA)
Abstract
In a stator of a rotating electric machine, when a winding operation is performed in a state where a plurality of teeth are linearly spread, there is a problem that a sufficient space cannot be secured between adjacent teeth. Therefore, the stator of the rotating electric machine according to the present invention includes a plurality of magnetic pole pieces and a plurality of iron pieces adjacent to each of the magnetic pole pieces, the magnetic pole pieces include a back yoke portion and a tooth portion protruding from the back yoke portion in a center direction, the back yoke portion is disposed along an outer periphery in a case where the plurality of magnetic pole pieces and the plurality of iron pieces are formed into a ring shape, and the iron pieces are rotatably coupled to circumferential end portions of the back yoke portions of the adjacent magnetic pole pieces.
Description
Technical Field
The present invention relates to a stator of a rotating electric machine and a method of manufacturing the stator of the rotating electric machine.
Background
Conventionally, there is known a motor configured to: the stator is configured by arranging magnetic pole pieces in an annular shape with a coil wound around the magnetic pole pieces, and a rotor having an output shaft is combined with the stator, wherein the magnetic pole pieces are configured by a laminated core including a back yoke portion and a tooth portion protruding from the back yoke portion.
Efficient winding of coils on such pole pieces is important, and various techniques are disclosed.
As one of such techniques, there is a technique as follows: by providing bent portions at positions corresponding to both sides of the base end portions of the teeth of the back yoke and bending and deforming a band-shaped back yoke having a plurality of teeth into a ring shape at the bent portions provided at the back yoke, a stator core of the motor is formed, whereby the coil can be continuously wound around each pole piece without cutting the coil (see, for example, patent document 1).
In the technique of patent document 1, since the winding operation can be performed in a state where the plurality of teeth are spread out in a reverse-warped shape (a state where the teeth face outward and face the flyer), the teeth adjacent to the teeth performing the winding operation can be arranged at positions where the leading end of the flyer does not interfere with each other, and the coil can be easily and neatly wound.
Documents of the prior art
Patent document
Patent document 1: japanese laid-open patent publication No. 11-262203
Disclosure of Invention
Problems to be solved by the invention
However, in the patent document 1, for example, when the winding operation is performed in a state where a plurality of teeth are linearly spread, a sufficient space cannot be secured between adjacent teeth. Further, since it is necessary to prevent the vicinity of the bent portion of the back yoke on the circular arc from interfering with the tip portion of the flyer, there is a problem that the operating range of the winding machine is greatly restricted by the back yoke when winding the wire on the teeth.
Means for solving the problems
The stator of a rotating electrical machine according to the present invention includes a plurality of magnetic pole pieces and a plurality of iron pieces adjacent to each of the magnetic pole pieces, the magnetic pole pieces each include a back yoke portion and a tooth portion protruding from the back yoke portion in a central direction, the back yoke portion is disposed along an outer periphery of the plurality of magnetic pole pieces and the plurality of iron pieces when the plurality of magnetic pole pieces and the plurality of iron pieces are formed into a ring shape, and the iron pieces are rotatably coupled to circumferential end portions of the back yoke portions of the adjacent magnetic pole pieces.
ADVANTAGEOUS EFFECTS OF INVENTION
According to the present invention, the following effects are provided: when the winding operation is performed in a state where the plurality of teeth are linearly spread, a sufficient space can be secured between adjacent teeth, and the operating range of the winding machine can be increased.
Drawings
Fig. 1 is a diagram showing a structure of a stator of a rotating electric machine according to embodiment 1 of the present invention.
Fig. 2 is a view showing a cross-sectional structure of a stator of a rotating electric machine according to embodiment 1 of the present invention at a-B.
Fig. 3 is a diagram showing another structure of a stator of a rotating electric machine according to embodiment 1 of the present invention.
Fig. 4 is a view of the magnetic pole piece and the iron piece which are rotatably connected by the thin portion being spread out linearly.
Fig. 5 is a schematic view of a stator of a rotating electric machine according to embodiment 1 of the present invention, in which a steel sheet is cut out from a strip-shaped electromagnetic steel plate.
Fig. 6 is a schematic view showing a part of an automatic winding machine for a stator of a rotating electric machine according to embodiment 1 of the present invention.
Fig. 7 is a schematic cross-sectional view showing a part of an automatic winding machine for a stator of a rotating electric machine according to embodiment 1 of the present invention.
Fig. 8 is a schematic view showing a case where the stator is deformed by being bent into a circular ring shape after the winding is performed.
Fig. 9 is a diagram showing a structure of a stator of a rotating electric machine according to embodiment 1 of the present invention.
Fig. 10 is a diagram showing a structure of a stator of a rotating electric machine according to embodiment 1 of the present invention.
Fig. 11 is a diagram showing a structure of a stator of a rotating electric machine according to embodiment 1 of the present invention.
Fig. 12 is a diagram showing a structure of a stator of a rotating electric machine according to embodiment 1 of the present invention.
Fig. 13 is a diagram showing a structure of a stator of a rotating electric machine according to embodiment 2 of the present invention.
Fig. 14 is a view of a rotating electric machine according to embodiment 2 of the present invention in which a stator is linearly developed.
Fig. 15 is a schematic view showing a case where the stator is deformed by being bent into a circular ring shape after the winding is performed.
Fig. 16 is a schematic view showing a case where the stator is deformed by being bent into an annular shape after the winding is performed.
Fig. 17 is a schematic view showing a stator of another rotating electric machine according to embodiment 2 of the present invention.
Fig. 18 is a schematic view showing a winding machine for a stator of a rotating electric machine according to embodiment 3 of the present invention.
Fig. 19 is a schematic view showing a stator of a rotating electric machine according to embodiment 4 of the present invention.
Fig. 20 is a schematic cross-sectional view showing a stator of a rotating electric machine according to embodiment 4 of the present invention.
Fig. 21 is a schematic view showing a stator of a rotating electric machine according to embodiment 5 of the present invention.
Fig. 22 is a view showing a case where the thickness of the iron piece is reduced.
Fig. 23 is a view showing a case where the thickness of the iron piece is reduced.
Fig. 24 is a view showing a case where the curvature of the arc of the iron piece is increased to form an extreme arch shape.
Fig. 25 is a view showing a case where the curvature of the arc of the iron piece is increased to form an extreme arch shape.
Fig. 26 is a view showing the structure of a stator of another rotating electric machine according to embodiment 1 of the present invention.
Fig. 27 is a view showing a structure of a stator of another rotating electric machine according to embodiment 1 of the present invention.
Fig. 28 is a schematic view showing a part of an automatic winding machine for a stator of another rotating electric machine according to embodiment 1 of the present invention.
Fig. 29 is a view showing the structure of a stator of a rotating electric machine according to embodiment 6 of the present invention.
Fig. 30 is a view showing the structure of a stator of a rotating electric machine according to embodiment 7 of the present invention.
Detailed Description
Next, embodiments of the present invention will be described with reference to the drawings. In the description of the drawings below, the same or similar parts are denoted by the same or similar reference numerals. However, the drawings are schematic, and it should be noted that the scale of each dimension and the like are different from those in reality. Therefore, specific dimensions and the like should be determined with reference to the following description. It is to be noted that the drawings naturally include portions having different dimensional relationships and ratios from each other.
Fig. 1 is a diagram showing a structure of a stator of a rotating electric machine according to embodiment 1 of the present invention. Fig. 2 is a view showing a cross-sectional structure at a-B of a stator of a rotating electric machine according to embodiment 1 of the present invention. In the figure, a stator 1 of a rotating electrical machine includes a plurality of magnetic pole pieces 2 and a plurality of iron pieces 3 adjacent to the magnetic pole pieces 2 and provided between the magnetic pole pieces.
The pole piece 2 is a structure in which a plurality of electromagnetic steel plates of substantially T-shaped thin plates are laminated in the direction of an output shaft V-W passing through the rotation center of the rotating electrical machine, and the stator 1 of the rotating electrical machine is configured to have a ring shape (also referred to as a cylindrical shape or an annular shape) as shown in fig. 1, and here, a substantially quadrangular (quadrangular prism) shape, a substantially octagonal (octagonal prism) shape, or other prism shapes as shown in the drawing are also described below as shapes included in expressions of a ring shape, an annular shape, or a cylindrical shape.
The pole piece 2 is arranged perpendicularly to the output shaft V-W, and when the stator 1 of the rotating electric machine is configured to have an annular structure, the pole piece is configured to include a back yoke portion 4 and a tooth portion 5, the back yoke portion 4 is arranged along the outer periphery, and forms a part of the outer peripheral portion, and a substantially flat main surface forms a part of the outer peripheral surface, and the tooth portion 5 is arranged so as to protrude from the back yoke portion 4 in the center direction of the rotation center and so as to face the output shaft at the inner end surface portion 51. Here, the magnetic pole piece 2 has a structure in which a plurality of thin electromagnetic steel plates are laminated in the direction of the output shaft of the rotating electrical machine, but may be an integrally molded product having a substantially T-shaped cross section in the direction of the output shaft of the rotating electrical machine. The tooth portions 5 are formed in a shape protruding perpendicularly from the center of the back yoke 4, but may be slightly offset. The reason why the substantially flat main surface of the back yoke portion 4 forms a part of the outer peripheral surface is that the molded product housing the stator is excellent in housing the prismatic shape, but depending on the shape of the molded product housing the stator, the outer peripheral surface may be not a flat surface but a curved surface.
The iron piece 3 is a structure in which a plurality of electromagnetic steel plates each having a substantially arc-shaped thin plate with a width are stacked in the direction of the output shaft V-W of the rotating electrical machine, and the iron piece 3 is disposed adjacent to and connected to the back yoke portions 4 of the plurality of magnetic pole pieces 2.
Here, the iron piece 3 is a structure in which a plurality of thin electromagnetic steel plates are laminated in the direction of the output shaft of the rotating electrical machine, but may be an integrally molded product having no laminated structure. The iron piece 3 may be formed in a quadrangular shape having a flat surface, although it has a substantially circular arc shape with a width, or one of an outer peripheral surface and an inner peripheral surface of the stator 1 of the rotating electric machine may be formed in a flat shape when the stator is formed in a ring shape. In the case of forming a quadrangular prism having a flat surface, the stator of the rotating electric machine has a substantially octagonal prism shape as shown in fig. 3.
The iron pieces 3 are rotatably coupled to circumferential end portions of the back yoke portions 4 of the adjacent magnetic pole pieces 2 around the output shaft V-W by the thin portions 6. The term "rotatable" as used herein also includes a case where the sheet is foldable.
However, one end of the back yoke portion 4 of at least one of the plurality of magnetic pole pieces 2 is not connected, and for example, the convex portion 7 is provided on one side and the concave portion 8 is provided on the other side, and they can be connected to each other in an expandable manner. In addition, fig. 1 shows a structure in which one convex portion and one concave portion are provided, but the structure is not limited to one, and two or three portions may be provided. In addition, any structure may be employed as long as the convex portions and the concave portions provided at the end portions of the back yoke portion and the end portions of the iron pieces are fitted to each other.
The stator 1 is configured by winding a coil 10 around the teeth 5 of the pole piece 2, and an insulator 9 as a molded member is disposed between the pole piece 2 and the coil 10 in order to ensure insulation between the pole piece 2 and the coil 10.
Here, in a state where the stator 1 is configured by abutting the convex portions 7 and the concave portions 8 and integrating the plurality of magnetic pole pieces 2 so that the tooth portions 5 face the direction of the output shaft (rotation center), the extended surface 12 of the coupling surface in the joint 11 of the back yoke portion 4 and the iron piece 3, that is, the thin portion 6 does not pass through the rotation center O of the output shaft V-W. At this time, an intersection line P where the extension surfaces 12 of the connecting surfaces of the thin portions 6 adjacent to each other with the iron piece 3 interposed therebetween can intersect is located away from the rotation center O in the outer circumferential direction.
Fig. 4 is a view showing a state in which the magnetic pole piece and the iron piece rotatably coupled by the thin portion are linearly developed. Here, a state is shown in which a coil 10 is wound around the tooth portion 5 via an insulator 9. As can be seen from the figure, the substantially flat main surface 42 of the back yoke portion 4 is a surface which forms a part of the outer peripheral surface when the stator of the rotating electrical machine is formed in an annular shape and becomes the upper surface of the magnetic pole piece when the stator of the rotating electrical machine is linearly developed, and the surface is substantially flat. In order to avoid an increase in iron loss and a decrease in motor efficiency due to an increase in magnetic resistance, the thickness of the back yoke 4 is substantially constant, and thus, a portion C where a winding is performed at a boundary between the back yoke 4 and the tooth portion 5, which is indicated by a dotted line in fig. 4, is configured not to have a deep concave shape.
In the figure, lower ends 43 of both end portions of the back yoke portion 4 are located lower than the lower ends 32 of the connection surfaces of the adjacent iron pieces 3, that is, located on the tooth portion 5 side. In other words, a center point 41 of a center line passing through the back yoke 4 indicated by a one-dot chain line is located lower than the center point 31 of the iron piece 3, that is, on the tooth portion 5 side. Therefore, when winding is performed, since the iron piece 3 is spread at a position away from the tip of the flyer of the winding machine, a sufficient area required for the tip of the flyer of the winding machine to rotate can be secured.
Further, as shown in fig. 27, even when the lower ends 43 of the both end portions of the back yoke portion 4 are developed so as to coincide with the positions of the lower ends 32 of the connecting surfaces of the adjacent iron pieces 3, that is, when the back yoke portion 4 and the iron pieces 3 are developed so as to be aligned with each other, a sufficient space can be secured between the adjacent teeth, and the distance of interference with the iron pieces 3 at the time of rotation of the tip of the flyer to the winding machine is smaller than that in the case of development as shown in fig. 4, and the structure shown in fig. 4 is more advantageous.
Fig. 5 is a schematic view of a stator of a rotating electric machine according to embodiment 1 of the present invention, in which a steel sheet is cut out from a strip-shaped electromagnetic steel plate. The steel plate piece 14 is shaped such that the longitudinal direction of the back yoke portion 4 of the magnetic pole piece 2 coincides with the longitudinal direction of the iron piece 3. The steel plate pieces 14 are arranged in parallel and punched so that the longitudinal direction of the back yoke portion 4 of the magnetic pole piece 2 and the longitudinal direction of the iron piece 3 coincide with the feeding direction indicated by the arrow of the electromagnetic steel plate 13, and at a position where the two steel plate pieces 14 face each other in the direction perpendicular to the feeding direction of the electromagnetic steel plate 13, the other tooth is housed in one adjacent tooth space.
In fig. 5, the two steel plate pieces 14 are arranged in a staggered manner such that the first steel plate piece 141 and the second steel plate piece 142 face each other, and are arranged such that the tooth portion 53 of the second steel plate piece 142 is accommodated between the adjacent tooth portions 52 of the first steel plate piece 141. The stator 1 of the rotating electric machine is configured by laminating a predetermined number of steel sheets 14 punched out from a strip-shaped electromagnetic steel sheet 13 by caulking. Then, an insulator 9 made of an insulating material is integrally molded on the outer periphery of the tooth portion 5 of the pole piece 2. Here, the terms back yoke, iron piece, and tooth portion sometimes refer to portions of the steel plate piece that correspond to the back yoke, the iron piece, and the tooth portion when the stator is configured.
Fig. 6 is a schematic view showing a part of an automatic winding machine for a stator of a rotating electric machine according to embodiment 1 of the present invention. The automatic winding machine 15 has a fixing jig 16 for fixing the stator 1 and a flyer 17 for winding the coil 10 on the tooth portion 5 of the pole piece 2.
The fixing jig 16 includes a base portion 18, a pressure plate 19, a screw 20, and a guide pin 21. The stator 1 is provided on the axial end face 39 of the base portion 18 in a shape in which the longitudinal direction of the back yoke portion 4 of the magnetic pole piece 2 coincides with the longitudinal direction of the iron piece 3, and as is apparent from the X-Y cross section shown in fig. 7, the stator is fixed at a predetermined position by bringing the end face 44 of the iron piece 3 on the outer side in the stator radial direction into surface contact with the base portion 18.
The pressure plate 19 is used to clamp the stator 1 in the output shaft direction and fix it to the base portion 18, and the pressure plate 19 and the base portion 18 are fixed by screws 20. The fixing structure is not limited to a screw, and may be fixed by a bolt and a nut, or may be fixed by an eyelet. The guide pin 21 is provided on the base portion 18 so as to be positioned near the rotation center of the bent portion connecting the magnetic pole piece 2 and the iron piece 3, and is used to guide a transition line 22, the transition line 22 connecting the coils 10 wound on the teeth 5 of the magnetic pole pieces 2 at the time of winding.
The flyer 17 is disposed so that a trajectory B traced by the tip end portion substantially coincides with the central axis of the tooth portion 5 of the pole piece 2, in this case, the trajectory B substantially coincides with an axis passing through the center of gravity of the tooth portion 5 in the longitudinal direction of the tooth portion 5, and slides in a direction C coinciding with the longitudinal direction. The sliding operation is also performed in the direction D that coincides with the longitudinal direction of the back yoke 4.
After the winding operation to the tooth portion 5 of one of the pole pieces 2 is completed, the flyer 17 is slid in the direction D, and the flyer 17 is moved to a position where the center axis of the tooth portion 5 of the adjacent other pole piece 2, which is not wound, substantially coincides with the rotation axis B of the flyer 17. At this time, the winding end portion of the coil 10 wound around the tooth portion 5 of one of the magnetic pole pieces 2 is not cut and is made to be the transition line 22 and to be along the outside of the guide pin 21 of the fixing jig 16, and then the tooth portion 5 of the other magnetic pole piece 2 is wound in the direction opposite to the direction wound around the tooth portion 5 of the one magnetic pole piece 2. In this way, the winding operation is sequentially performed on the teeth 5 of the non-wound pole pieces 2.
Fig. 8 is a schematic view showing a case where the stator is deformed by being bent into a ring shape after the winding is performed. In the figure, the tip end portions of the free end sides of the teeth 5 of the magnetic pole pieces 2 are sequentially pressed against the core rod 23, and the stator 1 is bent into an annular shape from a straight line at the time of winding. The end surfaces of the pole piece 2 and the iron piece 3 which are butted when they are closed into an annular shape are formed with a convex portion 24 and a concave portion 25, respectively, and the end surfaces are fitted by insertion from the circumferential direction.
After the fitting, the stator 1 is molded by a welding method such as TIG (tungsten inert gas) welding, for example, from the outer peripheral side of the stator 1 so that the butted end surfaces are fixed to each other and integrated. By providing the convex portion 24 and the concave portion 25 on the abutting surface, circumferential play at the time of abutting can be suppressed, and the roundness of the inner diameter can be improved. Further, as long as the magnetic pole piece or the iron piece has a structure in which the convex portion is provided on one side and the concave portion is provided on the other side, it is not necessary to specially determine which side is provided with the convex portion and which side is provided with the concave portion.
Fig. 26 is a diagram showing a structure of a stator of another rotating electric machine according to embodiment 1 of the present invention. In the figure, the magnetic pole piece 26 is a structure in which a plurality of electromagnetic steel plates of a substantially T-shaped thin plate are laminated in the direction of the output shaft of the rotating electrical machine, and includes a tooth portion 5 and a back yoke portion 4, the tooth portion 5 being a portion that is perpendicular to the output shaft in the radial direction, and the back yoke portion 4 being perpendicular to the tooth portion 5 in the circumferential (rotational) direction and constituting a portion of the outer circumferential surface.
The iron piece 27 is a structure in which a plurality of electromagnetic steel plates having a substantially arc-shaped thin plate with a width are laminated in the direction of the output shaft of the rotating electrical machine, and is disposed so as to connect the back yoke portions 4 of the plurality of magnetic pole pieces 2.
The magnetic pole pieces 26 and the iron pieces 27 are alternately arranged in an annular shape, and are connected to each other by the thin portion 6 at the end portions in the outer diameter direction of the adjacent back yoke portions 4 so as to be bendable. The back yoke portion 4 of the magnetic pole piece 26 and the radial end surface of the iron piece 27 are butted against each other to form a joint 29, and an extension 30 of the joint 29 passes through the center O of the stator 111. The extensions 30 of all the joints 29 that the stator 111 has intersect at the center O of the stator 111.
Fig. 27 is a schematic view of a case where the stator of another rotating electric machine shown in fig. 26 is developed linearly. As shown in the drawing, the lower ends of the two end portions of the back yoke portion 4 of the magnetic pole piece 26 are aligned with the lower ends of the connection surfaces of the adjacent iron pieces 27, that is, the back yoke portion 4 and the iron pieces 27 of the magnetic pole piece 26 are arranged substantially in the same straight line without a step.
Fig. 28 is a schematic view of a case where a wire is wound around a stator of another rotating electric machine shown in fig. 26. As shown in fig. 27, when the stator of another rotating electric machine is linearly developed, the back yoke portion 4 of the magnetic pole piece 26 and the iron piece 27 are developed substantially on a straight line, and the iron piece 27 has a slightly arc shape, so that there is very little margin in the direction away from the tip end of the flyer 17, but since the rotating surface Q of the tip end of the flyer 17 interferes with the back yoke portion 4, there is almost no margin in winding the wire on the fixed end side (back yoke 4 side) of the tooth portion 5 of the magnetic pole piece 26. However, since the iron piece 27 is disposed between the adjacent magnetic pole pieces 28, a sufficient lateral space for the rotation of the flyer 17 is secured.
As shown in fig. 4, the stator of the rotary electric machine according to embodiment 1 of the present invention is configured such that the iron piece 3 is separated from the pole piece 2 and spread out when the stator of the rotary electric machine is linearly spread out, and thereby a region required for rotating the tip end portion of the flyer 17 can be secured, and the iron piece 3 is a portion which has the same function as the back yoke portion 4 of the pole piece 2 in terms of function and which has been integrally formed with teeth as a back yoke in the related art.
Further, since the surface forming a part of the outer peripheral surface when the main surface 42 of the back yoke 4 and the stator of the rotating electrical machine are formed in an annular shape and the surface forming the upper surface of the magnetic pole piece when the stator of the rotating electrical machine is linearly developed is substantially flat, a recess having a notch is not formed in a portion where the winding is performed, particularly, in a boundary portion between the back yoke 4 and the tooth portion 5, and thus the tip end portion of the flyer 17 can reliably reach the root portion of the tooth portion 5 without interfering with the back yoke 4.
When the stator of the rotating electric machine is linearly developed, the lower end of the joint 11 portion of the iron piece 3 (the output shaft side end portion when the stator of the rotating electric machine is formed into an annular shape, and the tooth side end portion when the stator of the rotating electric machine is linearly developed) is always arranged above the lower end of the joint 11 portion of the back yoke 4 of the magnetic pole piece 2. Therefore, when the tip portion of the flyer 17 rotates, a distance to interfere with the iron piece 3 is increased, and the wire can be wound more deeply on the fixed end side (back yoke portion 4 side) of the tooth portion 5 of the magnetic pole piece 2.
Another method for increasing the distance to interfere with the iron piece 3 when the tip portion of the flyer 17 rotates includes: as shown in fig. 22 and 23, the thickness of the iron piece 35 is reduced, or as shown in fig. 24 and 25, the curvature of the arc of the iron piece 36 is increased to form an extreme arch shape. In the former case, by making the thickness of the iron piece 35 thin, the magnetic resistance increases as compared with the stator of the rotating electric machine according to embodiment 1 of the present invention, thereby increasing the iron loss and reducing the efficiency of the motor. In the latter case, similarly, the magnetic path becomes longer, and the magnetic resistance increases as compared with the stator of the rotating electric machine according to embodiment 1 of the present invention, whereby the iron loss increases and the efficiency of the motor decreases. However, the object of the present invention can be achieved in that the tip end portion of the flyer can be configured to reliably reach the root portion of the tooth portion.
Fig. 9 is a diagram showing the uneven intervals of the joints between the magnetic pole pieces and the iron pieces constituting the stator of the rotating electric machine according to embodiment 1 of the present invention. At an angle theta formed by the lower end parts (the end parts on the teeth parts 5 side) of the joint 11 at both ends of the iron piece2The angle theta is larger than the angle theta formed by the lower end parts (the end parts on the teeth parts 5 side) of the joint 11 at the two ends of the magnetic pole piece 21The pole pieces 2 and the iron pieces 3 are arranged in a small manner.
Fig. 10 is a view showing a state in which a stator of a rotating electric machine according to embodiment 1 of the present invention is developed linearly. As is apparent from the drawing, when the coil 10 is wound around the tooth portions 5 so as to have a substantially uniform thickness from the output shaft side to the back yoke side, the back yoke portions 4 of the tooth portions 5 are present on the back surface of the back yoke side of the insulator 9 without excess or deficiency, and therefore the back yoke portions 4 are in a state of pressing the back surface of the back yoke side of the insulator 9, and the insulator 9 can be suppressed from falling toward the back yoke portions 4 side.
On the other hand, fig. 11 and 12 are diagrams showing a case where the gap between the joint between the magnetic pole piece and the iron piece constituting the stator of the rotating electric machine according to embodiment 1 of the present invention is made uniform. At an angle theta formed by the joints 11 at the two ends of the pole piece 23An angle theta formed by the joint 11 of both ends of the iron piece 34Configured in a consistent manner. At this time, when the coil 10 is wound around the tooth portion 5 in a state where the stator of the rotary electric machine is linearly developed, since the back surface of the back yoke side of the insulator 9 exists beyond the back yoke 4 of the tooth portion 5, a portion where the back yoke 4 does not exist is generated on the back surface of the back yoke side of the insulator 9, and there is a possibility that the insulator 9 may fall toward the back yoke 4 side.
In contrast, in the case of the stator of the rotary electric machine shown in fig. 11, compared with the stator of the rotary electric machine shown in fig. 9, the ratio of the iron piece 3 to the back yoke portion 4 of the magnetic pole piece 2 can be increased, the rotation tip of the flyer can be brought to a position further away from the tooth portion 5, the curvature of the iron piece 3 can be increased, and the space required for the rotation of the tip of the flyer 17 can be increased, so that there is an advantage that the interference of the back yoke portion 4 with the flyer can be more reliably avoided, and the winding work becomes easy.
Fig. 13 is a diagram showing a structure of a stator of a rotating electric machine according to embodiment 2 of the present invention. In embodiment 1, the structure in which the insulator 9 covers the inner surface side of the back yoke portion 4 of the magnetic pole piece 2 is shown, but the insulator 91 of embodiment 2 of the present invention differs in that it covers not only the inner surface side of the back yoke portion 4 of the magnetic pole piece 2 but also the inner surface side of the iron piece 3.
With this configuration, even if the coils 10 are stacked high on the tooth portions 5 in order to increase the space factor of the coils 10, insulation between the inner surfaces of the iron pieces 3 and the coils 10 can be ensured. The magnetic pole piece 2 and the insulator 91 covering the iron piece 3 adjacent to the magnetic pole piece 2 at both ends thereof are an integral member, and are connected to each other at the outer diameter direction end 37 of the back yoke portion 4 adjacent to each other so as to be bendable by the notch 33.
Fig. 14 is a view of a rotating electric machine according to embodiment 2 of the present invention in which a stator is linearly developed. As shown in the drawing, when the insulator portion 91 is punched out of a strip-shaped electromagnetic steel plate, assembled, and wound, as shown in fig. 15, the stator 1 of the rotating electric machine is arranged such that the longitudinal direction of the back yoke portion 4 of the magnetic pole piece 2 coincides with the longitudinal direction of the back yoke portion 4 of the iron piece 3.
Fig. 15 and 16 are schematic views showing a state in which a stator of a rotating electric machine according to embodiment 2 of the present invention is bent into an annular shape. After the winding, the tip end portions of the free end sides (the output shaft side in the radial direction) of the teeth portions 5 of the respective magnetic pole pieces 2 are sequentially pressed against the core rod 23, and the stator 1 is bent into a circular ring shape from a straight line at the time of winding. At this time, the insulator 91 of the resin material is pushed and pressed by the inner surface side of the iron piece 3, and the stress concentrates on the notch 33 with a reduced thickness, and is bent from this position as a starting point.
Fig. 17 is a schematic view showing a state in which a stator of another rotating electric machine according to embodiment 2 of the present invention is formed in an annular shape. As shown in the drawing, the insulator 92 covers the inner surface side of the back yoke portion 4 of the iron piece 3. However, unlike the stator of the rotating electric machine shown in fig. 13, the pole piece 2 and the insulator 92 covering the iron piece 3 adjacent to the pole piece 2 at both ends are different members.
In this case, insulation between the inner surface side of the back yoke portion 4 of the iron piece 3 and the coil 10 can be secured as in the stator of the rotating electric machine shown in fig. 13, but the number of parts of the insulator is increased as compared with the stator of the rotating electric machine shown in fig. 13, and a longer time is required for the parts transportation work and the assembly work, thereby deteriorating productivity.
On the other hand, the space required for the rotation of the tip end portion of the flyer 17 can be larger than the stator of the rotating electric machine shown in fig. 13.
Fig. 18 is a schematic view showing a winding machine for a stator of a rotating electric machine according to embodiment 3 of the present invention. In the winding operation according to embodiment 1, the teeth 5 of the plurality of pole pieces 2 are sequentially wound by one flyer 17, but in the winding operation according to embodiment 3, the teeth 5 of the two pole pieces 2 are simultaneously wound by two flyers 17, which is different from embodiment 3.
The two flyers 17 are arranged in parallel so that the respective rotation axes B coincide with the longitudinal direction of the tooth portion 5. After the winding operation to the tooth portion 5 of one pole piece 2 is completed, the two flyers 17 are simultaneously slid in the direction D, and the two flyers 17 are moved to a position where the tooth portion 5 of the adjacent other non-wound pole piece 2 faces the rotation axis B of the flyer 17.
At this time, the winding end portion of the coil 10 wound around the one tooth portion 5 is not cut and is made to be the transition line 22, and is made to follow the outside of the guide pin 21 provided in the fixing jig 16, and then, the other tooth portion 5 is wound in the direction opposite to the direction wound around the one tooth portion 5. In this way, the winding operation is sequentially performed on the teeth 5 of the non-wound pole pieces 2. The winding operation time is significantly shorter than that in embodiment 1. Here, the number of the flyers 17 is two, but may be three, or may be three or more. However, the number of coils wound, the transition structure, and the like need to be studied.
Fig. 19 is a schematic view showing a state in which a stator of a rotating electric machine according to embodiment 4 of the present invention is formed in a ring shape. In the structure of the stator of the rotating electric machine according to embodiment 1, the magnetic pole pieces 2 and the iron pieces 3 are rotatably coupled to each other by the thin portions 6 in the circumferential direction around the output shaft, but in the structure of the stator of the rotating electric machine according to embodiment 4 of the present invention, as seen from the cross-sectional view S-T shown in fig. 20, the magnetic pole pieces 2 and the iron pieces 3 are provided with the convex portions 34 and the concave portions 38 toward the lamination direction of the thin plates at the ends in the outer diameter direction adjacent to each other, and the convex portions 34 and the concave portions 38 are caulked and fixed to each other to form a coupling mechanism that can be coupled to each other in a bent manner, which is different from embodiment 4.
In the present embodiment, the process of returning the stator with the coil wound thereon to the annular shape is easier than in embodiment 1, and productivity can be further improved. Further, high mechanical accuracy can be obtained, and even if the metal plate is bent a plurality of times, cracks can be prevented from being generated because the metal plate is not a thin portion, and as a result, problems such as deterioration of magnetic characteristics due to increase in magnetic resistance can be prevented.
Fig. 21 is a schematic view showing a state in which a stator of a rotating electric machine according to embodiment 5 of the present invention is formed in an annular shape. In embodiment 1, the number of the magnetic pole pieces 2 is 4, but by increasing the number of the magnetic pole pieces 2 and performing multipolarization, it is possible to reduce torque ripple generated in the rotating electrical machine. In addition, although the number of the magnetic pole pieces 2 is shown as 6, it is needless to say that the number may be 8, 9, or 9 or more.
Fig. 29 is a view showing the structure of a stator of a rotating electric machine according to embodiment 6 of the present invention. In the above embodiment, the stator is directly exposed, but may be a molded stator in which the stator is covered with a molded resin. With such a configuration, a stator having a high heat radiation effect can be configured. In the figure, the range indicated by oblique lines indicates the range covered with the molding resin.
The range indicated by oblique lines, that is, the region covered with the mold resin is characterized in that the outer diameter of the molded stator is larger than the outer diameter of the portion surrounded by the magnetic pole piece 2 and the iron piece 3 in the region covering the coil 10 and the transition line 22 and the region covering the magnetic pole piece 2 and the iron piece 3. On the other hand, the inner diameter of the molded stator substantially coincides with the inner diameter of the tooth portion 5.
Next, a method for manufacturing a stator of a rotating electric machine according to embodiment 6 of the present invention will be described. The method for manufacturing the stator of the rotating electric machine in the previous stage of resin molding is as described in the above embodiment, and therefore, the description thereof is omitted here. The resin molding method is explained below. The stator of the rotating electric machine according to the above embodiment is placed in a mold for resin molding, and a molding resin is poured therein. Examples of the molding resin used herein include polyphenylene Sulfide (PPS) resin, Polyacetal (POM) resin, Epoxy resin (EP) resin, and Epoxy resin.
Conventionally, when the heat radiation effect of the stator of the rotating electric machine is low, it is necessary to increase the outer diameter of the stator to enlarge the heat radiation area, and to provide high-temperature measures such as a cooling fan. However, in the stator of the rotating electric machine according to the present embodiment, the coil that generates heat is covered with the mold resin, and heat generated when the coil is energized is transferred to the mold resin to dissipate the heat, thereby having an effect of suppressing the temperature of the stator of the rotating electric machine. That is, if the temperature is within the preset temperature, the stator of the rotating electric machine can be further reduced in size.
Further, the coil is prevented from coming loose and coming into contact with the magnetic pole pieces and the iron pieces due to vibration generated during operation and transportation of the rotating electric machine, and the refrigerant, fuel, oil, or the like is prevented from adhering to the stator of the rotating electric machine and deteriorating.
Fig. 30 is a view showing the structure of a stator of a rotating electric machine according to embodiment 7 of the present invention. In the embodiment 6, the region covered with the mold resin is a region covering the coil and the transition line and a region covering the magnetic pole piece and the iron piece, and the region covered with the mold resin is a region covering the magnetic pole piece 2 and the iron piece 3, and therefore the outer diameter of the mold stator is larger than the outer diameter of the portion surrounded by the magnetic pole piece and the iron piece. By forming such a structure, the outer diameter can be reduced as compared with the whole molded body. In the figure, the range indicated by oblique lines indicates the range covered with the molding resin.
A method for manufacturing a stator of a rotating electric machine according to embodiment 7 of the present invention is substantially the same as the method for manufacturing a stator of a rotating electric machine according to embodiment 6 described above, and therefore, description thereof is omitted here. However, since the region covered with the mold resin is a region covering the magnetic pole piece 2 and the iron piece 3, the outer diameter of the stator of the rotary electric machine of the above-described embodiment 6 is larger than the outer diameter of the portion surrounded by the magnetic pole piece 2 and the iron piece 3, whereas since the region covered with the mold resin is a region covering a part of the magnetic pole piece and the iron piece, the outer diameter of the stator of the rotary electric machine of the present embodiment is the same as the outer diameter of the portion surrounded by the magnetic pole piece 2 and the iron piece 3. Thus, in addition to the effect described in embodiment 6, when the stator module is molded by placing the stator in the resin molding die, the magnetic pole piece or the yoke piece can be pressed by the resin molding die, and it is possible to prevent the magnetic pole piece or the yoke piece from moving due to the resin injection pressure at the time of molding and from being unable to be molded into a desired shape. In addition, in the case of being already produced, a more compact outer shape than the heat radiation effect can be achieved.
Description of the reference numerals
1 stator, 10 coils, 11 joints, 111 stator, 12 extended surfaces, 13 electromagnetic steel plates, 14 steel plates, 141 first steel plates, 142 second steel plates, 15 automatic winding machine, 16 fixing clamp, 17 flyer, 18 base part, 19 pressing plate, 2 magnetic pole piece, 20 screw, 21 guiding pin, 22 transition line, 23 core rod, 24 convex part, 25 concave part, 26 magnetic pole piece, 27 iron piece, 28 magnetic pole piece, 29 joints, 3 iron piece, 30 extension line, 31 central point, lower end of 32 connecting surface, 33 notch, 34 convex part, 35 iron piece, 36 iron piece, 37 outer diameter direction end part, 38 concave part, 4 back yoke part, 41 central point, 42 main surface, lower end of 43 two end parts, 5 tooth part, 51 inner side end surface part, 52 tooth part, 53 tooth part, 6 thin wall part, 7 convex part, 8 concave part, 9 insulator, 91 insulator, 92.
Claims (15)
1. A stator for a rotating electric machine, comprising a stator,
the disclosed device is provided with:
a plurality of pole pieces; and
a plurality of iron pieces adjacent to each of the magnetic pole pieces, a stator of the rotating electrical machine being centered on an output shaft passing through a rotation center of the rotating electrical machine,
the magnetic pole pieces have a back yoke portion arranged along an outer periphery in a case where the plurality of magnetic pole pieces and the plurality of iron pieces are formed into a ring shape, and teeth portions protruding from the back yoke portion in a direction toward the center and around which coils are wound,
the iron piece is rotatably coupled to circumferential end portions of the back yoke portions of adjacent magnetic pole pieces, and an angle formed by extensions of surfaces at both ends of the magnetic pole piece is larger than an angle formed by extensions of surfaces at both ends of the iron piece,
an intersection line formed by intersecting extension surfaces extending from both ends of the iron piece is located closer to the iron piece than the center.
2. The stator of a rotating electric machine according to claim 1,
the back yoke portion has a flat surface that constitutes a part of an outer peripheral surface in a case where the plurality of magnetic pole pieces and the plurality of iron pieces are formed in a ring shape.
3. The stator of a rotating electric machine according to claim 1 or 2,
when the plurality of magnetic pole pieces and the plurality of iron pieces are linearly developed, the lower end of the end surface of the back yoke portion is located below the lower end of the end surface of the iron piece facing the end surface of the back yoke portion.
4. The stator of a rotating electric machine according to claim 1 or 2,
the iron piece has an arc-shaped curved surface that forms a part of an outer peripheral surface when the plurality of magnetic pole pieces and the plurality of iron pieces are formed into a ring shape.
5. The stator of a rotating electric machine according to claim 1 or 2,
an end surface of a back yoke portion of at least one of the plurality of magnetic pole pieces and an end surface of the iron piece facing the end surface are provided with a concave portion and a convex portion which are fitted to each other, respectively.
6. The stator of a rotating electric machine according to claim 1 or 2,
the iron piece and the adjacent magnetic pole piece are connected by a thin portion so as to be bendable.
7. The stator of a rotating electric machine according to claim 1 or 2,
the motor further includes an insulator covering the teeth, and a coil is wound through the insulator.
8. The stator of a rotating electric machine according to claim 7,
the front end of the insulator extends to the inner peripheral surface of the iron piece adjacent to the magnetic pole piece provided with the insulator.
9. The stator of a rotating electric machine according to claim 8,
the insulator has a notch at a boundary portion between a pole piece provided with the insulator and an iron piece adjacent to the pole piece.
10. The stator of a rotating electric machine according to claim 1 or 2,
the plurality of magnetic pole pieces and the plurality of iron pieces are formed by laminating a predetermined number of punched electromagnetic steel plates,
the punched electromagnetic steel sheet is a series of electromagnetic steel sheets connected to portions corresponding to the plurality of magnetic pole pieces and the plurality of iron pieces, respectively.
11. The stator of a rotating electric machine according to claim 1 or 2,
a part or all of the plurality of magnetic pole pieces and the plurality of iron pieces formed in a ring shape are covered with a molding resin.
12. A method of manufacturing a stator of a rotating electric machine according to claim 10,
comprises the following steps:
a punching step of punching a series of electromagnetic steel sheets from a strip-shaped electromagnetic steel sheet, the electromagnetic steel sheets being connected to portions corresponding to the plurality of magnetic pole pieces and the plurality of iron pieces, respectively;
a laminating step of laminating the punched electromagnetic steel sheets;
a winding step of winding a coil around the teeth of the plurality of magnetic pole pieces in a state where the laminated electromagnetic steel sheets are linearly spread; and
and a deforming step of deforming the plurality of magnetic pole pieces and the plurality of iron pieces into a ring shape in a state where the coil is wound.
13. The manufacturing method of a stator of a rotating electric machine according to claim 12,
the punching step is a step of punching the two series of magnetic steel sheets arranged to face each other from the strip-shaped magnetic steel sheet.
14. The manufacturing method of a stator of a rotating electric machine according to claim 12 or 13,
an insulator covering at least a part of the tooth portion of the magnetic pole piece and the inner peripheral surface of the iron piece adjacent to the magnetic pole piece,
the winding step includes a step of winding a coil with the insulator interposed therebetween,
the deforming step includes a step of bending the insulator.
15. The manufacturing method of a stator of a rotating electric machine according to claim 12 or 13,
the method further includes a step of covering a part or all of the plurality of annularly formed magnetic pole pieces and the plurality of iron pieces with a molding resin.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2016176160 | 2016-09-09 | ||
| JP2016-176160 | 2016-09-09 | ||
| PCT/JP2017/032028 WO2018047839A1 (en) | 2016-09-09 | 2017-09-06 | Rotary electric machine stator and method for producing same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109661759A CN109661759A (en) | 2019-04-19 |
| CN109661759B true CN109661759B (en) | 2020-11-20 |
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| CN201780053244.8A Active CN109661759B (en) | 2016-09-09 | 2017-09-06 | Stator of rotating electric machine and method for manufacturing stator of rotating electric machine |
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| Country | Link |
|---|---|
| JP (1) | JP6811781B2 (en) |
| CN (1) | CN109661759B (en) |
| WO (1) | WO2018047839A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2019187082A (en) | 2018-04-10 | 2019-10-24 | 株式会社東芝 | Stator of rotary electric machine and method of manufacturing stator of rotary electric machine |
| CN114865810A (en) * | 2022-05-12 | 2022-08-05 | 珠海格力电器股份有限公司 | A stator assembly, motor and manufacturing method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1147163A (en) * | 1995-09-29 | 1997-04-09 | 三菱电机株式会社 | Electric blower and manufacturing method thereof |
| JP2007318858A (en) * | 2006-05-24 | 2007-12-06 | Shinko Electric Co Ltd | Linear actuator, stator assembly method for linear actuator, and actuator |
| CN202818041U (en) * | 2012-07-24 | 2013-03-20 | 美的威灵电机技术（上海）有限公司 | A stator structure for a single-phase induction motor |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2888142B2 (en) * | 1993-11-08 | 1999-05-10 | 三菱電機株式会社 | Rotary motor and method of manufacturing the same |
| JPH11262203A (en) * | 1998-03-10 | 1999-09-24 | Shibaura Mechatronics Corp | Motor stator core |
| JP3390684B2 (en) * | 1998-12-18 | 2003-03-24 | 三菱電機株式会社 | Stator and manufacturing method thereof |
| JP3430109B2 (en) * | 2000-02-25 | 2003-07-28 | 松下エコシステムズ株式会社 | Stator of adduction motor |
| JP3704029B2 (en) * | 2000-07-24 | 2005-10-05 | 三菱電機株式会社 | Starting motor stator |
| WO2017141761A1 (en) * | 2016-02-16 | 2017-08-24 | 三菱電機株式会社 | Stator of rotating electric machine, rotating electric machine using same, and manufacturing method for stator of rotating electric machine |
-
2017
- 2017-09-06 CN CN201780053244.8A patent/CN109661759B/en active Active
- 2017-09-06 JP JP2018538428A patent/JP6811781B2/en active Active
- 2017-09-06 WO PCT/JP2017/032028 patent/WO2018047839A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1147163A (en) * | 1995-09-29 | 1997-04-09 | 三菱电机株式会社 | Electric blower and manufacturing method thereof |
| JP2007318858A (en) * | 2006-05-24 | 2007-12-06 | Shinko Electric Co Ltd | Linear actuator, stator assembly method for linear actuator, and actuator |
| CN202818041U (en) * | 2012-07-24 | 2013-03-20 | 美的威灵电机技术（上海）有限公司 | A stator structure for a single-phase induction motor |
Also Published As
| Publication number | Publication date |
|---|---|
| JPWO2018047839A1 (en) | 2019-02-21 |
| WO2018047839A1 (en) | 2018-03-15 |
| JP6811781B2 (en) | 2021-01-13 |
| CN109661759A (en) | 2019-04-19 |
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