KR20150095819A - A transformer high voltage coil assembly - Google Patents

Abstract

The present invention provides a high voltage coil assembly of a triangular transformer and a triangular core transformer. The high voltage coil assembly includes three high voltage coils 102 and a respective high voltage coil 103 comprising a first terminal and a second terminal. The high voltage coil assembly further includes a first support insulation bar (301) and a second support insulation bar (302); The first terminals of each of the high voltage coils are connected to the first support insulation bar 301 by a conductor and the second terminals of each of the high voltage coils are connected to the second support insulation bar 302 .

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a transformer high voltage coil assembly,

The present invention relates generally to the field of transformer technology, and more particularly to a high voltage coil assembly having a support bar and also to a transformer, and more particularly to a triangular transformer using such a high voltage coil.

Triangular core transformers have many advantages such as low loss, reduced noise level, low weight, smaller inrush current, smaller footprints, more manageable external magnetic radiation fields and lower third harmonics in a three phase distribution system .

Referring to FIG. 1, triangular cores for a three-phase distributed transformer 100 are generally composed of three core frames 101 that are a group of one or more loops of magnet steel or similar low resistance material. The core frames, when viewed from above, are fitted together so that the core takes the shape of a triangle. Each shaped transformer is fitted onto a single core leg and two loops pass through a single core leg. The low-voltage coil 102 is disposed in the high-voltage coil 103 with an air gap therebetween. The air gap is for electrical strength.

Referring to Figs. 2A and 2B, each of the high voltage coils 103 has two terminals. The second terminal of the first high voltage coil is connected to the first terminal of the second high voltage coil so as to connect the three high voltage coils 103 together. And the second terminal of the second high voltage coil is connected to the first terminal of the third high voltage coil.

In order to connect the three high voltage coils 103 together, the existing device 121 is rather disorderly complex and consumes conductive material.

Therefore, it is necessary to improve the existing high voltage coil. To provide a simpler new structure, the conductor material must be conserved and the heat dissipation efficiency increased.

One of the purposes of embodiments of the present invention is to provide a transformer high voltage coil assembly that is at least simpler, saves cost and also increases heat dissipation efficiency.

In one aspect of the invention, a high voltage coil assembly of a triangular transformer is provided. The high voltage coil assembly of the triangular transformer includes three high voltage coils and each high voltage coil includes a first terminal and a second terminal. The high voltage coil assembly further includes a first support insulation bar and a second support insulation bar. The first terminals of each of the high voltage coils are connected by a conductor to a first support insulation bar and the second terminals of each of the high voltage coils are connected to the second support insulation bar by a conductor.

In one of the embodiments of the present invention, the first support insulation bar and the second support insulation bar are parallel to each other.

In one of the embodiments of the present invention, the first support insulation bar and the second support insulation bar are horizontal or vertical.

In one of the embodiments of the present invention, the first terminals and the second terminals of each of the high voltage coils are delta connected or Y coupled.

In another preferred embodiment of the invention, each end of the high voltage coil is fixed by three coil blocks.

In another aspect of the invention, a triangular core transformer is provided. The triangular core transformer includes a triangular core, a low voltage coil assembly, and a high voltage coil assembly. The high voltage coil assembly includes three high voltage coils, a first support insulation bar and a second support insulation bar. Each of the high voltage coils includes a first terminal and a second terminal. The first terminals of each of the high voltage coils are connected to the first support bar by a conductor and the second terminals of each of the high voltage coils are connected to the second support bar by a conductor.

In one of the preferred embodiments of the present invention, the low voltage coil assembly and the high voltage coil assembly are secured by three coil blocks.

In one of the preferred embodiments of the present invention, the first terminals and the second terminals of each of the high voltage coils are delta coupled or Y coupled.

In one of the preferred embodiments of the present invention, the low voltage coil assembly includes three low voltage coils. Each of the low voltage coils comprises at least two lead bars and the at least two lead bars are segregated in such a way that the radially directed protrusions of each of the at least two lead bars on the inner surface of the low voltage coil do not overlap.

In one of the preferred embodiments of the present invention, the high voltage coils are fabricated with a foil disk winding.

In one of the preferred embodiments of the present invention, the high voltage coil is fabricated by horizontally casting the high voltage coil disk windings.

The present invention will now be described, by way of example only, with reference to the accompanying drawings, in which: FIG.
1 is a perspective view of a triangular core transformer;
Figures 2a and 2b are perspective views of a conventional triangular core transformer having a conventional high voltage coil assembly.
3A to 3D are views showing a triangular core transformer having a high voltage coil assembly according to a preferred embodiment of the present invention, Fig.
Figure 4 is a triangular core transformer with a high voltage coil assembly according to another preferred embodiment of the present invention in which support insulating bars are arranged vertically.
5A is a perspective view of a triangular core transformer having a conventional high voltage coil assembly including four coil blocks; Figure 5b is a perspective view of a high voltage coil assembly according to the present invention and a triangular core transformer having only three coil blocks.
6A is a cross-sectional view of a triangular core transformer having conventional low voltage coil lead bars; 6B is a cross-sectional view of a triangular core transformer having two low voltage coil lead bars in accordance with a preferred embodiment of the present invention.

The present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which some, but not all, embodiments of the invention are shown. Indeed, the present invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; Rather, these embodiments are provided so that this disclosure will be capable of meeting applicable legal requirements. Like numbers refer to like elements throughout.

While the invention will be described in more detail by means of a triangular transformer, the design and improvement according to the invention is applicable to all types of transformers.

As described above, referring to Figs. 2A and 2B, each of the high voltage coils 103 has two terminals. The second terminal of the first high voltage coil is connected to the first terminal of the second high voltage coil so as to connect the three high voltage coils 103 together. And the second terminal of the second high voltage coil is connected to the first terminal of the third high voltage coil.

According to one preferred embodiment of the present invention, a triangular core transformer is provided. As shown in FIGS. 3A-3D, the triangular core transformer includes a triangular core 101, a low voltage coil assembly, and a high voltage coil assembly. The high voltage coil assembly includes three voltage coils (103), a first support insulation bar (301) and a second support insulation bar (302). Each of the high voltage coils 103 includes a first terminal and a second terminal. The first terminals of each of the high voltage coils are connected to the first support bar 301 by a conductor and the second terminals of each of the high voltage coils are connected to the second support bar 302 by a conductor.

In the preferred embodiments of the present invention, the first terminals and the second terminals of each of the high voltage coils are delta connected or Y coupled. Figure 3a shows that the high voltage coils are delta connected and Figure 3d shows that the high voltage coils are Y type connected.

In one preferred embodiment of the present invention, the low voltage coil assembly and the high voltage coil assembly are secured by three coil blocks 108, as shown in FIG. 5B. In the conventional design, as shown in Fig. 5A, there are four coil blocks 107, 107 'to fix the high voltage coils 103. Fig. Inner coil blocks 107 'located inside the triangular core block the air flow and thus reduce heat dissipation significantly. Compared to the conventional design using four coil blocks, the present invention saves cost by reducing one coil block. In addition, by removing the inner coil blocks 107 ', the heat dissipation efficiency is greatly increased.

Also as shown in Figure 1, the low voltage coil 102 requires two lead bars 111, 112 for further connection to both terminals. Conventionally, both lead bars 111 and 112 are positioned together as shown in FIG. 6A. This means that both lead bars are positioned at the same position in the vertical direction of the low-voltage core shaft 119. Since the transformer cores are located in the low voltage coil, the low voltage mold can not collapse with respect to the low voltage lead bar 112. Therefore, the outer diameter of the low-voltage coil must be increased by the low-voltage lead bars 111, 112. The low-voltage coil thickness 120 is calculated by the thickest portion. Referring to FIG. 6A, there are two lead bar portions. The two lead bar portions increase the additional high-low air gap.

The conventional design of the low voltage lead bars 111, 112 makes the low voltage coil very large and therefore the high-low air gap is large. This also makes the high-voltage coil large and the triangular core large.

According to a preferred embodiment of the present invention the transformer low voltage coil comprises a low voltage coil 102 and at least two lead bars 211 and 212 and the at least two lead bars 211 and 212 comprise a low voltage coil 102, In such a manner that the protrusions facing the radial direction 118 of each of the at least two lead bars 211, 212 on the inner surface of the lead frame are not overlapped. Herein, the radial direction 118 refers to the direction perpendicular to the axis 119 of the low-voltage coil 102. 6B.

The two lead bars 211 and 212 are separated in the direction 118 perpendicular to the axis 119 so that the thickest part 120 of the prior art is the thickest part 220). ≪ / RTI > As a result, the thickest portion of the low-voltage coil can be reduced from the thickness of the lead bar 211 or 212. 6B. As a result, the high voltage coil can reduce the semi-diameter of the thickness of the lead bar 211 or 212, and each frame of the delta core 101 can reduce the length of twice the thickness of the lead bar 211 or 212 .

In one preferred embodiment of the present invention, the high voltage coils are fabricated by foil disk windings. This is described in the prior application of the present inventor. See patent application PCT / US 12/36207.

In one preferred embodiment of the present invention, the high voltage coil is fabricated by horizontally casting the high voltage coil disk windings. This is also described in the prior application of the present patent application. See patent application PCT / US 12/36207.

Many modifications and other embodiments of the invention presented herein will be considered by those skilled in the art having the benefit of the teachings presented in the foregoing descriptions and the associated drawings. It is, therefore, to be understood that the invention is not to be limited to the specific embodiments disclosed, and that modifications and other embodiments are intended to be included within the scope of the appended claims. Moreover, although the above description and related drawings illustrate exemplary embodiments in the context of particular illustrative combinations of elements and / or functions, other combinations of elements and / or functions are possible without departing from the scope of the appended claims But may be provided by alternative embodiments. Although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.

Claims (11)

A high voltage coil assembly of a triangle transformer comprising three high voltage coils (102), each high voltage coil (103) comprising a first terminal and a second terminal,
The high voltage coil assembly further includes a first support insulation bar (301) and a second support insulation bar (302); The first terminals of each of the high voltage coils are connected to the first support insulation bar 301 by a conductor and the second terminals of each of the high voltage coils are connected to the second support insulation bar 302 High voltage coil assembly of a triangular transformer to be connected. The high voltage coil assembly of claim 1, wherein the first support insulation bar (301) and the second support insulation bar (302) are parallel to each other. The high voltage coil assembly of claim 1, wherein the first support insulation bar (301) and the second support insulation bar (302) are horizontal or vertical. The high voltage coil assembly of claim 1, wherein the first terminals and the second terminals of each of the high voltage coils (102) are delta coupled or Y coupled. 5. A high voltage coil assembly according to any one of claims 1 to 4, wherein each end of the high voltage coil (103) is secured by three coil blocks (108). A triangular core transformer comprising a triangular core (101), a low voltage coil assembly and a high voltage coil assembly,
The low voltage coil assembly includes three low voltage coils (102) and the high voltage coil assembly includes three high voltage coils (103); Each high voltage coil (103) includes a first support insulation bar (301) and a second support insulation bar (302); The first terminals of each of the high voltage coils 103 are connected to the first support insulating bar 301 by a conductor and the second terminals of each of the high voltage coils 103 are connected to the second support A triangular core transformer coupled to an isolation bar (302). 7. The triangular core transformer of claim 6, wherein each end of the low voltage coil and the high voltage coil is secured by three coil blocks (108). 7. The triangular core transformer of claim 6, wherein the first terminals and the second terminals of each of the high voltage coils are delta connected or Y connected. 9. A method according to any one of claims 6 to 8, wherein the low voltage coil assembly comprises three low voltage coils (102); Each of the low voltage coils 102 includes at least two lead bars 211 and 212 and the at least two lead bars 211 and 212 are connected to the at least two leads Wherein the radially directed protrusions of each of the bars are segregated in a non-overlapping manner. 10. The triangular core transformer of claim 9, wherein the high voltage coil (103) is fabricated from a foil disk winding. 10. The triangular core transformer of claim 9, wherein the high voltage coil (103) is fabricated by horizontally casting a high voltage coil disk winding.

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