SU540513A1 - Power supply system for feeding electrical installations with regulated current - Google Patents

Abstract

POWER SUPPLY SYSTEM STABILIZED CURRENT ELECTROTECHNOLOGICAL INSTALLATIONS, for example, electrical contact heating, containing inductive-capacitive stabilizer. current with a power transformer and short circuit, consisting of a fixed busbar directly connected to the transformer, and flexible moving sections, characterized in that, in order to reduce the power losses, the magnetic conductor and the primary winding of the specified transformer are uniformly distributed along the whole a fixed busbar, covering it in cross section, and a fixed shirer wire is the secondary winding of the transformer.

Description

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The invention relates to electrical engineering and can be used in metallurgy, in particular in arc melting, for carrying out contact heating of various metals and in other processes associated with the transfer of high currents at low voltages.

A power supply system with a stabilized current of electrical installations, for example electrocontact heating, comprising an inductive-capacitive current stabilizer with a power transformer and a short network consisting of a fixed busbar directly connected to the transformer, and flexible moving sections,

In the proposed power supply system, in order to reduce power losses, the magnetic core and the primary winding of said transformer are evenly distributed along the entire fixed busbar, covering it in cross section, and the fixed busbar is the secondary winding of the transformer.

Fig. 1 shows a step-down transformer of the proposed power supply system; 2 shows a section A-A in FIG. 3; a proposed system in an installation for arc melting of metals;

The proposed power supply system contains a step-down transformer, capacitive and inductive elements,

The step-down transformer consists of a primary water-cooled winding 1, a secondary water-cooled ob-.

skeins 2, magnetic core 3, flexible rubber hoses 4.

The primary-winding is made of a single layer of conductive tube with a hole a shifted relative to the longitudinal axis 5 for cooling it and the magnetic circuit.

Secondary winding is made in. It is a rectangular rectilinear pipe with an opening B for cooling 0 and is used as a busbar of a short network.

The magnetic core is assembled from electrical steel and consists of separate sections.

The design of the primary and secondary windings ensures the preservation of the mutual induction coefficient and the transformer power when the transformation ratio changes. The use of the secondary winding as a busbar shortens not only the length of the busbar of a short network, but also its inductive resistance (when using a source without rectifying the loading current) due to its bi-polarity with the primary winding and maximum convergence of the primary and secondary windings.

The design of the proposed power supply system allows embedding

0 it directly to the installation of the consumer. Fig. 3 shows the location of the current source on arc furnaces, which contain a current source 5, chamber b of an arc furnace, electro 5. 7. The built-in source of electric current allows to drastically reduce the -active and reactive losses of the short circuit, significantly expanding the range of current loads.

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Claims (1)

¹ ELECTRICAL POWER SUPPLY SYSTEM WITH STABILIZED CURRENT ELECTROTECHNOLOGICAL INSTALLATIONS, for example, electric contact heating, containing inductive-capacitive stabilizer. current with a power transformer and a short network consisting of a fixed busbar directly connected to the transformer and flexible movable sections, characterized in that, in order to reduce power losses, the magnetic circuit and the primary winding of the specified transformer are uniformly distributed along the entire fixed busbar, covering it is in cross section, and the fixed busbar is the secondary winding of the transformer.