JPS6136914A - Three phase, side abutting type core - Google Patents

Abstract

PURPOSE:To attempt miniaturization of a core by adopting core legs composed of directional silicon steel belts having different widths and hexagonal three phase yokes and reducing the length of the magnetic path remarkably. CONSTITUTION:Core legs 1, 1' and 1'' are obtained by arranging laminated cores subjected linearly to heat treatment so as to make each interval among the cores to be 120 deg.C. Three-phase yokes 2 and 2' are formed by applying pressure to annular laminated cores, in the direction toward their centers from outer six directions, transforming them into a hexagonal form and applying heat treatment to them. The yokes 2 and 2' are connected to the both ends of the core legs 1, 1' and 1'' so as to abut with them. This causes the length of the magnetic path to be reduced remarkably and miniaturization of the cores to be contrived.

Description

Detailed Description of the Invention: An iron core leg obtained by applying heat treatment to a straight line and arranging each core leg with an interval of 120°; 3 sets of volumes,
and a three-phase yoke made by heat-treating a ring-shaped stratified iron core into a hexagonal shape; Concerning the iron core.

Problems to be Solved by the Prior Art and the Invention In the conventional three-phase composite core, there are three yokes between the triangular yokes, which are made of an annular layered core or an annular wound core that has been heat-treated for deformation into a triangular shape.
There is one that abuts pairs of annular stratified core legs. 1. There is a method in which an iron core leg that has been heat-treated for deformation into a straight line and is divided into two parts in the axial direction and has a horse-shaped cross section is abutted between the above-mentioned triangular yokes. According to these configurations, the average magnetic path length of each phase is equalized and shortened, but the configuration of the core legs is complicated, and the windings on the core legs are not necessarily balanced. . Another drawback is that only non-oriented silicon steel strips can be used for the legs.

In the planar butting type core of the present invention, the above-mentioned drawbacks are solved by adopting core legs made of grain-oriented silicon steel strips having different widths and a hexagonal three-phase yoke, and the size is further reduced. The purpose is to

EXAMPLE The laminated core legs are constructed by arranging grain-oriented silicon steel strips and steel slabs having several different widths in a spirally concentric configuration. Therefore, as shown in Figure 4, there are three core legs 1.1' and 1'.
The cores are arranged so that the distance between each core leg is 120°.

On the other hand, a three-phase yoke 2 and a ring-shaped stratified iron core made of grain-oriented silicon steel strips and steel pieces having a required width and concentrically configured in a spiral shape are heat-treated to transform into a hexagonal shape by applying pressure from the outer six directions toward the center. 2' is connected to both ends of the above-mentioned core legs 1.1' and 1'' so as to abut each other, as shown in FIGS. 1, 2, 5 and 6.

Next, as shown in Fig. 4 from Fig. 1, 1 core leg], 1'
and 1 has a predetermined three-phase winding m3. :V and 3 are each packed into a rectangular shape, and these windings are connected to the second
As shown in the figure, three phases are configured.

Effects of the Invention Since the three phases are arranged so as to form an angle of 120°, the magnetic path lengths of each phase are equal, and the winding configuration is balanced.

The three-phase yokes 2 and 2' are heat-treated to transform into a hexagonal shape, and the three-phase yokes 2 and 2' are
Core legs 1, 1' and 1 and 6 arranged in phase

[Brief explanation of drawings]

FIG. 1 is a side view of an embodiment of the triad plane part ^jl i of the present invention. FIG. 2 is a plan view of the embodiment shown in FIG. FIG. 3 is a plan view of the core leg and winding of the embodiment shown in FIG. 1. FIG. 4 is a side view of the core leg and winding shown in FIG. 3. FIG. 5 is a plan view of the yoke of the embodiment shown in FIG. 1. 6 is a side view of the yoke shown in FIG. 5. FIG. In the figure 1, 1/, 1tt: Iron core leg 2.2': Yoke 3 r 3', 3//: Winding patent applicant Tokuden Co., Ltd. agent Patent attorney Ishi 1) Road Lost / 121 Figure 3 No. 5 figure

Claims (4)

[Claims] (1) Consisting of core legs obtained by arranging linearly heat-treated laminated cores with an interval of 120° between them, and a three-phase yoke made of an annular laminated core heat-treated to transform into a hexagonal shape. A three-phase planar abutment type core in which the three-phase yokes are connected to both ends of the core legs so as to abut each other. (2) The three-phase planar butting type iron core according to claim 1, wherein each of the above iron cores has grain-oriented silicon steel strips arranged in a spirally concentric configuration. (3) The three-phase planar butting type core according to claim 1, wherein the laminated core constituting the core legs is composed of grain-oriented silicon steel strips and steel slabs having several different widths. (4) The three-phase plane-matching iron core according to claim 1, wherein the core leg is equipped with a rectangular three-phase winding.