JP4573323B2 - Winding coil - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a winding coil suitable for use in electrical equipment such as a motor and a generator.
[0002]
[Prior art]
In general, it is advantageous to reduce the winding resistance of a winding coil used in an electric device such as a motor or a generator as much as possible in order to reduce the loss and size of the electric device. Further, when the winding resistance is large, the temperature rise due to heat generation becomes large, so that there is a problem that an insulating material having high heat resistance must be used.
[0003]
Therefore, the number of winding coils using a rectangular wire that can increase the conductor space factor compared to a round wire having a circular cross-sectional shape that has been conventionally used, and as a result, can reduce the winding resistance (for example, patents). Reference 1).
[0004]
[Patent Document 1]
JP 2002-222724 A
[Problems to be solved by the invention]
However, in such a conventional winding coil, a narrow portion having a relatively narrow width is formed at predetermined intervals with respect to the longitudinal direction of the flat wire, and the flat wire is curved at the narrow portion. Since the winding coil having a small curvature of the curved portion is formed, the cross-sectional area of the narrow portion becomes smaller than the cross-sectional area of the other portion, and a new problem that the winding resistance increases in the narrow portion. Has occurred.
[0006]
[Means for Solving the Problems]
The present invention has been made in view of the drawbacks of such a conventional winding coil, and an object thereof is to provide a winding coil using a rectangular wire having a small winding resistance.
[0007]
In order to achieve the above object, a winding coil according to the present invention has a rectangular wire having a rectangular cross section having a winding start end portion and a winding end portion and a uniform width. A winding coil that is sequentially wound from the start end side toward the winding end portion and is laminated, and has a plurality of bent portions that sequentially bend the plane side of the rectangular wire at an arbitrary angle, The bent portions that are folded are pressed against each other so that the bent portions are rolled so as to approach the thickness of the rectangular wire .
[0008]
The winding coil according to the present invention is characterized in that an insulating film made of a resin is formed on the peripheral surface of the winding coil .
[0009]
Further, in the winding coil according to the present invention, after winding one winding coil, one rectangular wire forming the one winding coil is stretched as it is, and the next winding coil is continuously continued. It is characterized by being formed.
[0010]
Furthermore, the winding coil according to the present invention is characterized in that an arbitrary number of bent portions are formed by adjusting the bending angle of the flat wire.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a winding coil according to the present invention will be described in detail with reference to the drawings.
[0012]
FIG. 1 is a perspective view showing a winding coil 10 as an example of an embodiment of the present invention, in which the windings are separated from each other so that the winding state can be easily understood.
[0013]
The winding coil 10 is composed of a single rectangular wire 11 having a rectangular cross section, and the rectangular wire 11 has a winding start end portion 11A and a winding end portion 11B.
[0014]
The winding coil 10 is inserted into a tooth section 12 (see FIGS. 4 and 5) having a rectangular cross section to show a suitable example. The winding coil 10 has a rectangular wire 11 from the winding start end 11A side. Sequentially, it is wound left-handed while forming a bent portion while being bent 90 degrees, and is wound the necessary number of times to reach the winding end portion 11B.
[0015]
FIG. 2 shows a plan view of the winding coil 10. In the figure, reference numeral 13 denotes a winding coil manufacturing jig for forming a winding coil 10 adapted to be inserted into the tooth portion 12.
[0016]
The winding coil 10 positions the flat wire 11 along the outer peripheral surface of the winding coil manufacturing jig 13, and sequentially bends the flat wire 11 by 90 degrees at the four corners of the winding coil manufacturing jig 13. It is formed by laminating while forming the part.
[0017]
Thereafter, a portion of the bent portion formed by bending the flat wire 11 at 90 degrees is pressed so that the flat wire 11 is in close contact with each other. Further, by pressing more strongly, the bent portion is rolled, and the thickness of the bent portion approaches the thickness of the flat wire 11. Thereby, the close_contact | adherence degree between each line | wire of the winding coil 10 increases, and a conductor space factor can be enlarged further.
[0018]
FIG. 3 is a diagram for explaining a winding state of the winding coil 10. 2A is a view in the direction of arrow A in FIG. 2, FIG. 2B is a view in the direction of arrow B in FIG. 2, FIG. 2C is a view in the direction of arrow C in FIG. 2, and FIG. FIG. 4 represents a view in the direction of the arrow D, and facilitates understanding of the winding state of the winding coil 10, in particular, the state of bending and lamination in the bent portion.
In FIG. 3, illustration of the winding coil manufacturing jig 13 in FIG. 2 is omitted.
[0019]
After the winding coil 10 is formed as described above, a resin such as enamel, polyurethane, polyester or the like is appropriately selected according to the usage environment of the winding coil 10 and an insulating film is formed on the peripheral surface of the winding coil 10. May be formed.
[0020]
FIG. 4 is a partial cross-sectional perspective view showing an example in which the winding coil 10 is mounted on the stator core 14. Note that the winding coil 10 in the figure is simplified in illustration of the bent portion in order to avoid complication of illustration and to facilitate understanding of the configuration.
[0021]
In FIG. 4, reference numeral 15 denotes a press plate that prevents the winding coil 10 inserted into the tooth portion 12 from falling off. The press plate 15 is locked between adjacent tooth portions 12.
[0022]
Reference numeral 16 denotes a connection line for electrically connecting adjacent winding coils 10, and the connection line 16 connects the winding start end portion 11 </ b> A and the winding termination end portion 11 </ b> B of the adjacent winding coil 10.
[0023]
FIG. 5 is a partial cross-sectional perspective view showing another example in which the winding coil 10 is mounted on the stator core 14. Also in the figure, like the winding coil 10 in FIG. 4 described above, in order to avoid complication of illustration and to facilitate understanding of the configuration, the illustration of the bent portion is simplified.
[0024]
In FIG. 5, 17 is a buffer band formed between the adjacent winding coil 10A and winding coil 10B. The other configuration is the same as that of the example shown in FIG.
[0025]
In this example, the winding coil 10A is formed by winding the rectangular wire 11 as shown in FIG. 6, but after winding the winding coil 10A, the winding coil 10A is wound from the winding end portion 11B of the winding coil 10A. The rectangular wire 11 is stretched as it is to the winding start end portion 11A of the wire coil 10B, and the winding coil 10B is continuously formed. A buffer band 17 is formed between the winding coil 10A and the winding coil 10B. Thus, the coils 10A and 10B are integrally formed without any electrical loss.
[0026]
In the other example of this embodiment shown in FIG. 5, the two winding coils 10A and 10B are integrally formed. However, three or more winding coils may be integrally formed. .
[0027]
As a result, according to another example of the present embodiment shown in FIG. 5, the connection line 16 as in the example shown in FIG. 4 becomes unnecessary, and connection failure can be prevented.
[0028]
In addition, by forming the plurality of winding coils 10A and 10B in accordance with the facing angle of the teeth portion 12 to be inserted and the curvature of the stator core 14, the insertion into the teeth portion 12 is facilitated and the buffer band Since 17 itself is formed to be extendable and retractable, it can be easily and reliably attached to the stator core 14 even if there is some mismatch in curvature.
Here, since the buffer band 17 is for facilitating the attachment of the winding coils 10A, 10B to the stator core 14, as long as the winding coils 10A, 10B can be attached to the stator core 14, It is not essential in the invention.
[0029]
Although this embodiment is configured as described above, the shape of the winding coil 10 is not limited to a rectangular shape, and as shown in FIG. 7, a hexagonal winding coil 20 or the like, a tooth portion or a core By changing the bending angle according to the shape, various polygonal shapes, circular shapes, elliptical shapes and the like can be handled.
[0030]
【The invention's effect】
Since the winding coil according to the present invention is configured as described above, it is possible to provide a high-quality winding coil without increasing the winding resistance at the bent portion unlike the conventional winding coil. it can.
[0031]
In addition, winding coils of various shapes can be freely formed corresponding to the teeth portions and cores of various shapes.
[0032]
Furthermore, in the present invention, since a plurality of winding coils can be formed continuously with a single rectangular wire, not only need to consider an increase in winding resistance, but in particular, a small and large current. If it is applied to a winding coil that requires the above, a high-output electric device can be obtained.
[0033]
Furthermore, since the manufacturability can be improved and the manufacturing cost can be reduced as compared with the conventional winding coil, it has a feature that it is extremely excellent in economic effect.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a winding coil 10 as an example of an embodiment of the present invention. FIG. 2 is a plan view of the winding coil 10. FIG. 3 is a diagram illustrating a winding state of the winding coil 10. 4 is a partial cross-sectional perspective view showing an example in which the winding coil 10 is mounted on the stator core 14. FIG. 5 is a partial cross-sectional perspective view showing another example in which the winding coils 10A and 10B are mounted on the stator core 14. FIG. 6 is a diagram showing the shape of continuous winding coils 10A, 10B in another example. FIG. 7 is a diagram showing a modification of the shape of the winding coil 20.
DESCRIPTION OF SYMBOLS 10 Winding coil 10A Winding coil 10B Winding coil 11 Flat wire 11A Winding start end part 11B Winding termination part 12 Teeth part 13 Winding coil manufacturing jig 14 Stator core 15 Presser plate 16 Connection line 17 Buffer band 20 Winding coil

Claims (4)

A rectangular wire having a rectangular cross section having a winding start end and a winding termination end and having a uniform width is wound from the winding start end side toward the winding termination portion sequentially, and laminated. A plurality of bent portions obtained by sequentially bending the plane side of the rectangular wire at an arbitrary angle, and the bent portions that are folded are pressed against each other so as to be in close contact with each other. A winding coil, wherein each bent portion is rolled so as to approach the thickness of the rectangular wire . The winding coil according to claim 1, wherein an insulating film made of a resin is formed on a peripheral surface of the winding coil. 2. After winding one winding coil, one rectangular wire forming the one winding coil is stretched as it is, and subsequently the next winding coil is continuously formed. Winding coil as described in. The winding coil according to claim 1 or 3, wherein an arbitrary number of bent portions are formed by adjusting a bending angle of the flat wire.

Images