JPS6047306A - Method of producing low impedance bus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a method of providing a low impedance bus bar.

Technical background of the invention and its problems] Conventionally, three-phase coaxial cables, multicore low-impedance cables, and three-phase insulated bus ducts have been known as low-impedance busbars.

However, since three-phase coaxial cables have each conductor arranged coaxially, they have the advantage of extremely low reactance, but they have the disadvantage of making it difficult to transmit large currents, and are Impedance bus cables have the advantage of reducing reactance by increasing the number of conductors per unit, and balancing the impedance of each phase, but it is difficult to transmit large currents, and there are many conductors at the terminals of the cable. However, three-phase insulated bus ducts have the advantage of being able to transmit large currents, but are limited in reducing reactance. Not only that, but if the length is long, the unbalance of the phase-to-phase voltage becomes large, and it is necessary to install a bridge between the phases.

[Object of the Invention] The present invention has been made to solve these drawbacks, and provides a low impedance bus that has low reactance, eliminates phase-to-phase voltage unbalance, and is not capable of transmitting large currents. The purpose is to provide a manufacturing method for.

1. Komei's III Essentials 43 The method for manufacturing the low impedance busbar of the present invention is (a) 9 s of metal strips fed out continuously.
An insulating coating is applied around the insulating coating, and (b) a pair of conductive molded bodies made by forming a conductive metal band plate into a U-shaped cross section is placed around the insulating coating, with each of the four parts facing inward ( ) C fitted,
The abutting portions of both ends of the outer periphery are fixed, and (c) the conductive molded body and the insulating coating are sequentially installed by roughly repeating the step (b) above around the insulating coating.

[Embodiment 1 of the Invention] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

B) In FIGS. 1 and 2, a strip conductor 1 made of copper or aluminum first passes through a straightening roll 2,
Next, after passing through a surface treatment tank 3 for degreasing, etc., and subjected to C surface treatment, the tape is sent out almost parallel to the upper and lower sides of the tank 3. The insulating tape 4 is welded to the area where it passes through.

(b) Next, around the band-shaped insulated coated conductor 6 manufactured in this way and running continuously, a conductive metal band plate 7, which is supplied almost in parallel, is formed into a U-shaped cross section. A pair of electrically conductive molded bodies 8 protruding outwards are covered. The electroformed body 8 is supplied by passing the continuously fed conductive metal strip 7 through a forming device 9 and a surface treatment bath 10 such as degreasing.

Next, after the molded portions at both ends of the conductive molded body 8 are cold-pressed through a pressure bonding roll 11, an insulating coating 4' is applied to the surface of the conductive molded body 8 in the same manner as described above.

(c) Roughly, the step (D) above is repeated around this insulating coating 4', and the electric metal strip 7 and the insulating coating 4' are formed concentrically in multiple layers. Winding device R
It is wound up.

Figure 3 shows the insulating coating 4 of the conductive metal strip 7 obtained in this way.
' is a low impedance I+11Q composed of two layers each.
12 shows a cross-sectional view of 12.

In other words, in this embodiment, t! is continuously supplied. Since the insulating tape 4 and the conductive metal strip 7 are continuously fed out and attached around the strip-shaped conductor 1 made of aluminum or aluminum, the low-impedance bus bar 12 is long and has a high opening. can be produced continuously for 9.0 hours. Furthermore, since the conductive metal strips 7 are arranged concentrically, there is an advantage that the reactance is reduced, and the unbalance of phase voltage is also eliminated.

Furthermore, by changing the width and thickness of the conductive metal strip 7, the current capacity can be easily increased.

Note that FIG. 4 is a diagram showing another embodiment of the present invention. In this embodiment, as shown in the figure,
This is an example in which the molded portions at both ends of a conductive molded body 8 made of a conductive metal strip 7 are fixed by welding, and the insulating tape 4 is covered by extruded plastic coating. indicates white deck coating.

[Effects of the Invention] As is clear from the above description, according to the method of the present invention, a long, highly flexible, low impedance bus bar can be produced continuously and at low cost! ! Since the low impedance bus of the present invention has conductive metal strips arranged concentrically, it is possible to obtain a low impedance bus that has a small reactance and eliminates the unbalance of the phase 11fl voltage. is possible.

[Brief explanation of drawings]

1 and 2 are explanatory diagrams of an embodiment of the method of the present invention,
FIG. 3 is a cross-sectional view of a low impedance bus line obtained in the example, and FIG. 4 is a low impedance 11 line obtained in another example. 1...Band-shaped conductor 2...Straightening roll 4...
......Insulating tape 5...Heating roll 6...Insulating coated conductor 7.
......Conductive metal strip plate 8...
... Conductive molded body 12 ...... Low impedance busbar agent valve engineer Sa Suyama - (1 other person) Fig. 1 Fig. 2

Claims (1)

[Claims] (1) A pair of metal strips formed by (a) applying an insulating coating to the outer periphery of a continuously fed metal strip, and (b) subsequently forming a conductive metal strip into a U-shaped cross section around this insulating coating. The conductive molded body is fitted with each of the four parts facing inward, and the abutting portions of both ends of the outer periphery are fixed. A method for manufacturing a low impedance bus bar, comprising sequentially providing a molded body and an insulating coating.