SU1617578A1 - A.c. to d.c. voltage converter - Google Patents

Abstract

The invention relates to power converter technology and can be used in the development of low-voltage, high-current secondary power sources. The purpose of the invention is to improve the weight and size parameters. The effect is due to the implementation of the surge reactor in the form of an inductive divider 11. In this case, the six windings of the divider are connected by one outputs to the secondary windings 3, 4 of the transformer 1, and others to the valves 5 - 10. 2 Il.

Description

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The invention relates to power converter technology and can be used in the development of low-voltage, high-current secondary power sources.

The purpose of the invention is to improve the mass-size parameters.

FIG. 1 is a schematic diagram of a variable-voltage-to-constant voltage converter; in fig. 2a – 3c are voltage and current diagrams characterizing its operation.

The converter contains (fig., 1) a transformer 1 with a primary winding 2 and two secondary windings 3 and 4, semiconductor devices (gates) 5-10 and an inductive divider 11. The ends of the primary winding 2 of transformer 1, connected, for example, in a star form input terminals converter The secondary windings 3 and A of transformer 1 are connected to the forward and reverse stars, and the zero outputs of the stars of the windings form the first output terminal. The ends of one star of winding 3 of transformer 1 are connected to the beginnings of three windings of inductive divider 11, the ends of which are connected to sentiles 5, 6 and 7. The beginnings of another star are winding 4 connected to the ends of the other three windings of six-winding inductive divider 11, the ends of which are connected to the valve mi 8, 9 and 10. The free terminals of the valves 5-10 are combined and form the second output terminal of the converter.

The device works as follows.

When the input voltage is applied, the circuit operates similarly to a six-phase (twice three-phase) with a balancing reactor. The rectified voltage curve (at the load, Fig. 2a), obtained by adding the phase voltage and the voltage on the windings of the divider, has a sixfold pulsation. On the windings of the inductive divider, when the "O" is formed, a voltage close to triangular is formed.

Due to the fact that an average value of current Id / 6 flows through the windings of the inductive divider, the windings of the inductive divider can be made multi-turn with a sharp decrease in the magnetism of the magnetic circuit, which leads to a decrease in the mass of the inductive divider. By performing an equalizing reactor in the form of an inductive divider, the consumption of non-ferrous materials is reduced, since the busbar of high-current circuits is simplified, semiconductor devices are better used in current, and the weight of the reactor equipment is reduced.

Claims (1)

Invention Formula AC to DC converter containing a three-phase transformer with two secondary windings, one of which is connected directly and another into a star, the combined zero terminals of which form the first output terminal, six gates, one output of each of which is connected to the conclusion of the corresponding winding of the equalization reactor, which is also distinguished by the fact that, in order to improve the overall dimensions, the equalization reactor is designed as an inductive current divider, and second secondary winding is connected to the beginnings of the three winding inductive divider free phases other terminals of the secondary winding connected to the ends of the other three coils of the inductive divider, and the other terminals of these gates are combined, form a second output pin. vVv e L.ZH