JPS60189910A - Iron core for stationary electric equipment - Google Patents

Abstract

PURPOSE:To improve the magnetic characteristics of an iron core, by inclining the butt joint parts between the leg parts of the iron core and the yoke parts of the iron core, thereby making the area of the butt joint parts larger than the area of the cross section of the iron core, and reducing the adverse effect of a gap. CONSTITUTION:A leg part 1 of an iron core comprises many laminated sheets of steel plates, whose both ends are obliquey cut in a symmetrical shape and the shape of the side surfaces is a trapezoidal shape. At both ends, slanted end surfaces 1a and 1a are formed. Each yoke part 2 of the iron core is constituted by laminating many sheets of belt shaped steel plates having the equal width. Each yoke part 2 of the iron core is butted to the slanted end surfaces 1a at both ends of the leg parts of the iron core under the state the laminating direction of the yoke parts crosses the laminating direction of the steel plates of the leg parts of the iron core at a right angle. Closed magnetic paths are formed by the leg parts 1 and 1 of the iron core and the yoke parts 2 and 2 of the iron core. Windings 3 and 3 are coupled into the leg parts of the iron core before the yoke parts of the iron core are connected to the leg parts of the iron core.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to iron cores used in static 10U air equipment such as transformers and reactors.

BACKGROUND OF THE INVENTION Conventionally used cores for stationary electrical equipment include wound cores and laminated cores. The winding core is made of grain-oriented silicon steel plate, etc., which has magnetic properties of 1 (a lifting platform using a steel plate of 1 has a good flow of long fleas). but,
The iron core with this structure is difficult to manufacture, and it is difficult to automate the iron core manufacturing process.5. It is ll. A laminated core C is a laminated core made of laminated strip-shaped steel plates to form a core leg portion and a core yoke portion.
There are also known products that are constructed by combining a ftlI layer of E-shaped steel plates and a laminate of I-shaped steel plates, but those using strip-shaped steel plates require manpower to assemble. Automation of assembly C is rotation. In addition, for those using E-shaped steel plates and I-shaped steel plates, a technology has been developed to mass produce them using cutting molds, but since expensive molds are used, discharge lamps are manufactured by hand. It can only be applied to small transformers such as electric ballasts, and is not suitable for iron cores used in transformers such as power transformers that are produced in small quantities.

OBJECT OF THE INVENTION An object of the present invention is to provide a 1q.
The purpose of this invention is to provide an iron core for stationary electrical equipment that can

Structure of the Invention The present invention improves/measures an iron core for stationary electric equipment in which iron core yoke parts are arranged at both ends of the iron core leg parts. , the core leg portion is constructed by laminating a large number of steel plates with diagonally cut ends, and inclined end faces are formed at both ends of the core leg portion. 'r hYr in a piece
The iron part of the iron core II and the iron core legs are oriented perpendicularly to the direction in which the steel plates are laminated.
- (Arrangement Iv/c: h, 1111 The core yoke portions are Wi1 joined to the (1 diagonal GE+ planes) at both ends of the core leg portions.

In the configuration described in item 1-, the directions of the diagonal cuts at both ends of the core legs are arbitrary. 1)) Both ends of the steel plate may be diagonally cut in the same direction so that the side shape is a parallelogram, or both ends of the steel plate may be diagonally cut in different directions so that the side surface shape is trapezoidal.

In the above configuration, the core yoke portion only needs to have a laminated surface that can be anastomoses joined to the inclined end surface of the core leg portion, and its cross-sectional shape is not limited to a rectangular shape. In other words, by stacking strip-shaped steel plates with the same width dimension, the cross section becomes rectangular or square.
:I constitutes the iron core yoke part which has a parallelogram shape, and Cb
J, ku, width x1 method is a little bit longer.

The iron core yoke portion may be formed by laminating two strip-shaped steel plates, each of which has a trapezoidal shape.

Example The yield system of the present invention will be explained below with reference to the accompanying drawings.

Figures 1 and 2 show a first embodiment in which the present invention is applied to a transformer iron core. 1 is a cross-sectional front view of the winding shown at -C. In these figures, C11°1 is the core leg portion 1'1 arranged parallel to the slope, and 2.2 is the core leg portion 1.
1 is butt-jointed to both ends of the IJ core yoke. The core leg 1 is made of 7 laminated steel plates with both ends diagonally cut into a symmetrical 4F shape and the side surface shape is trapezoidal.The core leg 1 has 7 slanted end surfaces 1a and 1a on both ends in the same 77 direction. is formed. Each core yoke part 2 is formed by laminating a large number of strip-shaped steel plates with equal width dimensions.
There is. Each core yoke part 2 is inserted and joined (butt jointed) to the inclined end surface 1a at both ends of the core leg part with its lamination direction perpendicular to the steel plate lamination direction of the core leg part. 1
, 1 and the iron core yoke portion 2.2, a closed magnetic circuit is constructed. The core legs and the core yoke are integrated by an appropriate stage of the 1-band All fastening fitting t9. .3 is fitted onto the core leg before joining the core yoke to the core leg.

33 and 4 show a second embodiment of the present invention. In this embodiment, the core legs are cut diagonally in different directions at both ends of a 14-piece steel plate. (The side shape of the core legs is formed into a parallelogram.Other points are the same as the embodiments shown in FIGS. 1 and 2.

+A of the core leg part 1 and the core yoke part in each of the above embodiments.
The quality does not need to be the same, and an appropriate monthly interest rate C can be created for both. For example, the core legs and core yoke are J
Non-oriented silicon steel plate in ξ or direction t! A shaped steel plate may be made of a cable steel plate, and one of the core legs and the 8-core yoke may be formed from a non-oriented silicon steel plate, and the other from a grain-oriented silicon steel plate. In addition to the effects of the present invention, the core legs may be formed of a non-oriented silicon steel plate or a grain-oriented silicon steel plate, and the iron core yoke may be formed of an amorphous alloy plate with low loss. In this case, since the abutment joint between the core leg and the core yoke is slanted by one angle, the area of the abutment joint can be reduced by the core cross-sectional area J. Therefore, it is possible to reduce the adverse effects of the voids in the butt joints between the core legs and the core yoke, and it is possible to join the core legs and the core yoke using laborious joining methods such as 1) second fitting. without using -b
It is possible to remove air 1h11 from the sides of the iron core in a good manner.

In addition, the magnetic flux of the leg can be transferred to the yoke along the length direction of the leg (the magnetic flux can be transferred to the yoke without crossing the opposite rolling direction).
:t There are few low notes in f'l. Further cutting the steel plate
The core can be manufactured by laminating the m-roots cut from the culms and the step of butting the core yoke to the core leg.The C1 core is easy to manufacture; III'l construction can be easily automated.

The cross-sectional shape of the core yoke part is not limited to the shape of each of the above embodiments, and the cross-sectional shape of the core yoke part can be trapezoidal or parallel as shown in Figure 5 △C. It can also be formed into a quadrilateral shape or the like.

[Brief explanation of drawings]

1 and 2 are a partially sectional side view and a front view, respectively, of a first embodiment of the present invention, and FIG. 3 and FIG. L shows the second embodiment of the present invention partially in cross section, I shows a side view and a front view, and FIG. It is a side view of the main part shown. 1. Core legs, 1a... Inclined end face, 2... Core yoke 1゜'J/a.

Claims (1)

[Claims] In an iron core for stationary electrical equipment in which a core yoke is provided at each end of a core leg, the core leg is made of a laminated large number of steel plates with both ends cut diagonally. With the end face to the right, the core joint ♀ is made of a large number of laminated rectangular steel plates.The core joint ♀ is formed by laminating a large number of rectangular steel plates. An iron core for stationary electrical equipment, characterized in that the iron core legs are arranged so that the stacking directions of the respective steel plates are perpendicular to each other.