JPH02285615A - Fixing structure of voltage transformer - Google Patents

Abstract

PURPOSE:To obtain the title fixing structure of simple construction with which the irregularity in characteristics of a voltage transformer can be prevented by a method wherein the inserting side of the winding of a cut core is positioned outside a spacer, the spacer is inserted between the cut cores on the other side, a yoke band is wound on the outside of the cut cores, and both ends of the yoke band are coupled. CONSTITUTION:In the fixing structure of a voltage transformer wherein cut cores 2A and 2B, which are butt-together and inserted from both sides of cylindrically wound windings 1A and 1B, are juxtaposed and the outer circumference of the cut cores 2A and 2B is fixed by a fixing means, the inserting side of winding of the above-mentioned cut cores 2A and 2B is positioned outside, a spacer 8 is inserted between the cut cores 2A and 2B on the other side, a yoke band 9 is wound on the outer circumference of the cut cores 2A and 2B, and both ends of the yoke band 9 are coupled. For example, an aluminum spacer 8 is inserted between the left and right cut cores 2A and 2B whereon windings 1A and 1B are mounted, and the spacer 8 and the cut cores 2A and 2B are clamped, together with mounting leg 6 inserted in front and in the rear of the cut cores, from outside using a yoke band 9.

Description

[Detailed description of the invention] [Purpose of the invention] (Industrial application field) The present invention relates to a core fixing structure for a voltage transformer.

(Prior art) In Fig. 3, which shows an example of the core fixing structure of a conventional voltage transformer, the cut cores 2A and 2B, to which the left and right windings IA and IB are respectively attached, are wound around a single strip-shaped core. The wires IA and I are cut in the center and made into a U shape.
After being inserted from both sides of B, the yoke band 3 is wrapped around it. Also, this cut core 2A.

2B is sandwiched from above and below by a lower yoke 5 and an upper yoke 4, which are juxtaposed with each other and have L-shaped mounting legs 6 on the front and back.
They are fixed at predetermined intervals by being tightened with screws 7.

In addition, the primary side terminals U□ and vl are pulled out from one side of the winding IA, the secondary side terminal u11Vl is pulled out from the other side, and the primary side terminal 031v3 is pulled out from one side of the winding IB, and the secondary side terminal is pulled out from the other side. Next side terminal u: Jlv3 is pulled out.

Figure 4 is a connection diagram of the windings IA and IB in Figure 1, where the secondary terminals V, V3 are connected, and the secondary terminals u1 and u are connected.
3 is also connected to a power supply side and a load side (not shown), respectively.

(Problem to be Solved by the Invention) However, in the iron core fixing structure of the voltage transformer having such a configuration, due to the shape error of the cut cores 2A and 2B, for example, as shown in FIG. When it is tilted by hl, the tightening by the upper and lower yokes 4 and 5 changes over time and the characteristics vary.

Also, when tightening with the yoke band 3, if
) If the abutted portion shifts (h2), the characteristics of the voltage transformer will also change.

SUMMARY OF THE INVENTION An object of the present invention is to obtain a fixed structure for a voltage transformer that has a simple structure and can prevent variations in the characteristics of the voltage transformer.

[Structure of the invention]

(Means and Effects for Solving the Problems) In the present invention, cut cores inserted from both sides of a cylindrically wound winding wire and abutted are juxtaposed, and the outer peripheries of the juxtaposed cut cores are connected to each other using a fixture. In the fixing structure of a voltage transformer to be fixed, a spacer piece is inserted between the cut cores on the other side with the winding insertion side of the cut core outside, and a yoke band is wrapped around the outside of the cut core to secure the yoke. This fixed structure of the voltage transformer has a simple structure, does not change over time, and has uniform characteristics of the voltage transformer by connecting both ends of the band.

(Example) Hereinafter, an example of the iron core fixing structure for a voltage transformer of the present invention will be described with reference to the drawings. However, parts that overlap with Figure 3 are omitted.

In FIG. 1, an aluminum spacer piece 8 is inserted between the left and right cut cores 2A and 2B to which the windings J and IB are attached, and the spacer piece 8 and the cut core 2A.

2B is tightened from the outside with a single yoke hand 9 together with the mounting legs 6 inserted in the front and back, as will be described in detail later.

That is, in FIG. 2, which shows the view in the direction of arrow A in FIG. After being formed, maintain the tightened state and bend the tip from the middle part of the tightening end 9a to the center part B to wrap around the tightening end 9b, and then, as shown in FIG. 2(b)
It is then further bent and folded from the outside, and a small diameter electrode is placed on the outside for spot welding.

In addition, cut core 2A is equipped with windings IA and IB.

2B are placed side by side with the side where the windings IA and IB are inserted on the outside as shown in Fig. 1, and the mounting legs 6 are tightened together with the spacing piece 3 with a yoke band 9, and then a small diameter electrode is placed on the outside. is applied and fixed to the yoke band 9 by spot welding.

In the core fixing structure of the voltage transformer having such a configuration, the abutting portions of the cut cores are pressed against each other by the tightening force of the yoke band 9, and the cut cores 2A, 2B and the spacing piece 8 are also pressed against each other, so that Since it is not subjected to the force of , the characteristics do not change over time even if there is an error in the cut as shown in FIG. 5(a). Furthermore, since it is tightened from the side, the
) It is unlikely that it will be assembled in such a state.

Furthermore, in the front-back direction, on one side only the thickness of the yoke band 9 (approximately 1 nn) protrudes outside the cut cores 2A and 2B, on the other side only the folded amount protrudes, and on the left and right sides the winding IA protrudes.

Since the outer surface of the IB serves as the end, the outer shape of the voltage transformer can be made smaller.

Furthermore, since there are no screw parts, there is no risk of loosening, resulting in a highly reliable iron core fixing structure.

In the above embodiment, the spacer piece 8 is made of aluminum, but it may also be made of an insulating material such as a glass fiber-filled polyester plate or a porcelain material. In this case, there is an advantage that not only is there no heating due to leakage magnetic flux, but also that there is no change over time in the latter case.

〔Effect of the invention〕

As described above, according to the present invention, in the fixing structure of a voltage transformer, cut cores inserted from both sides of a cylindrical winding and abutted against each other are juxtaposed, and the outer peripheries of the cut cores are fixed to each other with a fixture. A spacing piece was inserted between the cut cores on the other side with the winding insertion side of the core outside, a yoke band was wrapped around the outer periphery of the cut cores placed side by side, and both ends of the yoke band were connected to each other. Therefore, it is possible to obtain a fixed structure of a voltage transformer that is simple in structure and has uniform characteristics of the voltage transformer.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an embodiment of the voltage transformer fixing structure of the present invention, FIG. 2 is an explanatory diagram showing the main parts of the voltage transformer fixing structure of the present invention, and FIG. 3 is a conventional voltage transformer fixing structure. A perspective view showing the fixing structure of the transformer, FIG. 4 is a connection diagram of FIG. 3, and FIG. 5(a). (b) is an explanatory diagram showing the effect of the conventional fixing structure of a voltage transformer. IA, IB... Winding parts 2A, 2B Cut core 8... Spacing piece 9... Yoke band

Claims (1)

[Claims] In a voltage transformer fixing structure in which cut cores inserted from both sides of a cylindrically wound winding and abutted against each other are juxtaposed, and the outer periphery of the cut core is fixed with a fixture, the winding insertion side of the cut core Fixing of a voltage transformer, characterized in that a spacing piece is inserted between the cut cores on the other side with the cut cores on the outside, a yoke band is wound around the outer periphery of the cut core, and both ends of the yoke band are connected. structure.