JPS603108A - Core for electric apparatus - Google Patents

Abstract

PURPOSE:To enhance the magnetic characteristic, and to save the component of a core for electric apparatus by a method wherein auxiliary cores are arranged along the main core having a noncircularly cross-sectional outline, and joined to make the outline shape of the cross section of a leg part to be closely resembled to a circle. CONSTITUTION:The leg part of a core A consists of the main core 12 having the cross section consisting of a noncircular outline part having step parts 11 of the plural number, and auxiliary cores 14 of the plural number arranged as to come in contact with flat parts 13, 13 meeting at right angles mutually at the respective step parts 11 of the core 12, and the auxiliary cores thereof have the shapes as to make the outline shape of the cross section of the core leg part wound with a winding to be resembled to a circle. The outline shapes of the cross sections of the cores 14 are formed in triangles, arranged to the prescribed step parts 11, and the cross-sectional shapes of the auxiliary cores are so set as to make the oblique sides of the outlines of the cross sections of the respective auxiliary cores to coincide nearly with the straight lines to connect between the adjoining top parts of the outline of the cross section of the core 12. Accordingly, the space factor of the core is enhanced, and moreover the auxiliary cores can be constructed with the leftover material of a magnetic material sheet constructing the main core.

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION The present invention relates to an iron core used in electrical equipment such as transformers and accelerators.

PRIOR TECHNOLOGY In general, in static induction electricity such as transformers (some J3 devices), the space factor between the inner periphery of the coil and the iron core is minimized to improve the space factor of the iron core, thereby improving the tIl characteristics. As shown in Figure 1, the outline of the cross section of the legs of the core 1 is as follows: There is a method in which the outline of the cross section of the core leg is approximated to a circular shape by having a plurality of steps 2.However, in order to approximate the outline of the cross section of the core leg to a circle with this method, it is necessary to It is necessary to form a large number of wafers, which has the disadvantage that processing is troublesome and expensive.

In addition, by winding the magnetic material sheet 1-3 having the outline shape shown in FIG. 2(a) around the iron core of this conventional scale, a magnetic material sheet 1-3 having a nearly circular cross-sectional shape as shown in FIG. 2(b) can be wound. , 11 parts, and those in which the transverse cross-sectional shape of the leg part is made circular by winding a sheet 4 of any material having the shape as shown in Fig. 3(a). When manufacturing the iron core, it is extremely troublesome to set the shape of the magnetic material sheet, and the work of cutting and winding the sheet is also extremely troublesome, resulting in a large number of man-hours and high equipment costs. It had the disadvantage of being expensive.

OBJECTS OF THE INVENTION An object of the present invention is to provide an iron core for electrical equipment that can be manufactured at low cost by reducing the number of processing steps and assembly steps.

Structure of the Invention The iron core for an electric machine of the present invention includes a main core in which the outline of the cross section of the leg around which the winding is wound is non-circular, and the outline of the cross section of the leg is made to approximate a circular shape. 1M with the auxiliary core placed along with the main core and connected to the main core.
will be accomplished.

With the above configuration, it is possible to avoid approximating the cross section of the leg portion of the iron core to a circular shape, and it is possible to improve the space factor of the iron core. In addition, since the auxiliary core can be formed using the remaining material formed when the magnetic material sheets constituting the main core are removed, it is possible to save 4JF+.

EXAMPLES The present invention will be explained in detail below with reference to FIGS. 4 to 12.

Figure 4 shows the first embodiment of the present invention, and in this figure, the outline of the cross section of the core is shown by a solid line, and the circle circumscribing the outline of the cross section is shown by a thin line. .

The core A of this embodiment includes a main core 12 whose leg section has a non-circular contour with a plurality of steps 11;
A plurality of auxiliary iron cores 1 are arranged so as to be in contact with mutually orthogonal flat portions 13 and 13 in each step portion 11 of the cross section of 2.
These auxiliary cores have a shape that approximates the circular cross-sectional profile of the core legs around which windings (not shown) are wound. The main core 12 and the auxiliary core 14 are formed by laminating magnetic plates or winding magnetic material sheets, and in this embodiment, the cross-sectional profile of the auxiliary core 14 is triangular. . Each of the auxiliary cores 14 formed in this way is arranged at a predetermined step 11 of the main core 12, and when each auxiliary core is arranged, the hypotenuse of the cross-sectional profile of each auxiliary core crosses the main core 12. The cross-sectional shape of each auxiliary core is set to approximately match a straight line connecting adjacent tops of the surface outline. Therefore, in the iron core of this embodiment, the gap between the circle B circumscribing each top of the contour of its cross section and the iron core A can be narrowed to approximate the cross-sectional shape of the iron core A to a circular shape. The space factor can be increased.

FIG. 5 shows a second embodiment of the present invention, in which the main core 12 is formed the same as that of the first embodiment, and the cross-sectional shape of each auxiliary core 15 is rectangular or It is square. In the core A' of this embodiment, each auxiliary core 1 is attached to a circle B circumscribing the top of the lateral i-plane of the main core 12.
The shape of each auxiliary core is determined so that one of the outer tops of the cores is in contact with each other. That is, in this embodiment, the number of steps 11 of the main core 12 can be reduced, and the number of steps as a whole can be increased, and the cross-sectional shape ν (to the core can be approximated to a circle). .

When manufacturing the iron core of the above-mentioned actual flow example using the Eil plate root layer, as shown in Fig. 6(a), the U root layer is laminated and a plurality of steps are formed at each top or inscribed in a circle. 11.11.
Main core 1 having a non-circular cross-sectional shape forming...
form 2. Next, the width, length, etc. are set to a predetermined method 1 using the remainder A''!f left after cutting the magnetic plate constituting the main iron core 12!...: The magnetic plate is shown in the same figure (b). By stacking a predetermined number of iron cores and fixing them with a chive 16.16., an auxiliary iron core 14 with a triangular cross section, or an auxiliary iron core 15 with a rectangular or rectangular lateral cross section is formed. The auxiliary core 14 or 15 is arranged and joined to the flat part 13 of each step 11 of the main core 12 to form the core A or 8 so that its cross-sectional profile approximates a circle.

When making the iron core of the above embodiment into a wound core (manufactured by winding the sheet 1), first set the width of each part as appropriate, and then wind the sheet so that the whole forms a circle. A main core is formed which has a shape such as a rectangle and a non-circular cross-sectional profile having a plurality of steps similar to those of the laminated core described above.Next, a core is bonded to each step of the main core so as to cover it. A magnetic material sheet S is wound around the tsuba (4) using the winding frame 17 to form an auxiliary core.In manufacturing this auxiliary core, the residual material left after cutting the magnetic material sheet constituting the main core is used. Then, as shown in FIGS. 7(a) and (1)), we manufacture 14 cranes whose cross section is triangular or 15 whose cross section is rectangular or square. If the width of the remaining material is insufficient, the remaining material may be added to produce the product, or if the width of the remaining material is insufficient, the remaining material may be arranged in multiple rows in the width direction.In this way, the winding frame 17 into a predetermined shape and fixed with tape 18.18. to form an auxiliary core 14 or 15 (see FIGS. 8 to 10).

FIG. 11 shows a third embodiment of the present invention, in which wide flat portions 19, 19 are provided at the ends of the main core 12 of the first embodiment, and these flat part 19.19
Auxiliary core 20.20. ... is arranged and joined together. Each flat portion 19 has two sections having a right triangular cross section.
Horn? ili...j Iron cores 20 are arranged so that the cross-sectional shape is an isosceles triangle. Note that this auxiliary core 20 is also manufactured by the same method as described above.

FIG. 12 is a diagram showing a fourth embodiment of the present invention. In this embodiment, the cross-sectional profile of the main core 12-
1.21 and a flat part 22.22, and each flat part 22 has two auxiliary cores 20 tied together in the same manner as the auxiliary core 20 of the third embodiment of the present invention. Place and join.

d3 In the above explanation, when manufacturing auxiliary cores by bundling magnetic material sheets, the method of fixing the magnetic material sheets is to tighten the bundled sheets with tape. Although the above method is described above, the present invention is not limited to this method, and for example, the bundled magnetic material sheets may be fixed with resin.

The auxiliary core used in the present invention can be constructed from the remaining material left after cutting the magnetic material sheets constituting the main core. This allows leftover materials to be used without waste, and the effects are noticeable.

Further, in the above embodiment, the auxiliary iron core is made of the remaining material that is generated when cutting the magnetic material that makes up the main iron core, but the present invention is not limited to this, and the auxiliary iron core can be made of other magnetic materials. l) may be used.

Effects of the Invention As described above, according to the present invention, the ring ζ°1 of the cross section is arranged and joined to the non-circular main core along with the auxiliary core, so that the contour shape of the cross section of the leg portion is approximated to a circular shape. I made it so that
It is possible to improve the space factor of the iron core and improve the ``U 141 air characteristics.Also, it is easy to process and assemble, and the remaining material generated when the main iron core is 4M made of auxiliary iron core. This has the advantage that the iron core can be manufactured at low cost.

[Brief explanation of the drawings] Fig. 1 is a cross-sectional view of the leg of a conventional iron core, Figs. Plane of the resistant shrine sheet [cross-sectional view of zl and legs,
4 and 5 are cross-sectional views of the legs of the first and second embodiments of the present invention, respectively, and FIGS. 6(a) and 6(b)
) shows an example in which the present invention is applied to a laminated core, and FIGS. 7(a) and (b) respectively show the winding state of an auxiliary core when the present invention is applied to a wound core. explanatory diagram,
Figure 8 shows the winding method of the auxiliary core applied to the wound core.
The explanatory drawings, FIGS. 9 and 10 are explanatory drawings showing the overall shape of the wound auxiliary core of the present invention, respectively, and FIGS. FIG. 2 is a cross-sectional view of a tl iron core showing an example. 12.12-... Main core, 14.15.20... Auxiliary core, A, 8'... Iron core.・1;7F21 ・713゛9th cabinet 1st (I-・′i ri, r ii r; ε1 121st! Procedure strike 11 positive f
jy (Method) 1932) 8zu 1-October 7 [1 Commissioner of the Japan Patent Office Kazuo Wakasugi P9 1. Indication of matter 1'1 11 Showa 58-'110689 2. Name of the invention Electricity is skillful Relationship with the Ministry of Affairs I'1 with a heart of 3.7m positive
m 6 No. 11 [1和58119月271.1 6, Pair of amendments 9 Drawing 7 Figure 7, Contents of the amendment The marks R(a) and <b> as shown in red on the attached sheet are inserted and reversed in Figure 7 of the drawing. that's all

Claims (1)

[Claims] A main core for electrical equipment including a leg portion around which a winding is wound, the leg portion having a non-circular cross-sectional profile;
An electric core for electrical equipment, comprising: an auxiliary core arranged along and joined to the main core so that the contour shape of the 4I11 cross section of the leg portion approximates a circular shape.