SU1576939A1 - M-phase bridge reversible conversion unit - Google Patents

Abstract

The invention relates to converter equipment and can be used to build the power section of valve electric drives. The purpose of the invention is to reduce the size of the device with natural air cooling. For this purpose, in a phase bridge reversing conversion unit containing valves 1-6, 8-13 tablets, clamped between the current leads 7 and 14 of the direct current, which are simultaneously coolers, the current leads are made of ribbed. Three current leads of alternating current are made in the form of flat tires. Moreover, the valves pressed to each of the AC buses with the same electrodes belong to different bridges. Such an arrangement of valves allows, at any time, to have only one valve on each cooler. 2 Il.

Description

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The invention relates to converter equipment and can be used to build the power section of valve electric drives.

The aim of the invention is to reduce the size of the unit with natural air cooling.

Fig. 1 shows an electrical diagram of a three-phase bridge unit in Fig. 2, the construction of the proposed unit.

Consider the operation of the unit using the example of a three-phase anti-parallel circuit for switching on valves. Moreover, the converter transformers are assembled in such a way that the upper six (fig.O constitute the first bridge, and the lower six - the second bridge, simultaneous operation of the bridges is excluded. At that, six valves 1–6 located to the speva are pressed to the first current lead 1 and the pole of the regular valves 8--13 to the second current lead 14 of the direct current (cooler) are connected to the two sides of the AC bus 15 (FIG. 2) four valves 1,4,8 and 11 phase A (in FIG. 1, the compound is shown by a line of increased thickness).

The valves 1.11 are pressed to the bus with 15 cathodes, and the valves with 4.8 - anodes, in the same way, the units are installed on buses 16 and 17 of phases B and C, respectively. The free electrodes of the valve are placed with ribs facing the first 7 and second f4 coolers, which press the valves to the AC buses 15-17 and are electrically insulated one from the other using insulating sleeves 18.

Gates 1,4,8 and 11 of phase A are pressed to bus 15 of phase A so that those of them that are pressed to this bus by electrodes of the same name (for example, valves 1.11) are installed opposite to each other on opposite sides of bus 15i But together however, these valves belong to different bridges, the separate control of which eliminates the simultaneous operation of these valves. This allows, for example, when the valve 1 is turned on, in addition to removing heat from its anode, heat is removed from its cathode through a thermal connection in the form of a bus 15 and valve 11 off and dissipates this heat by a cooler 14, the anode valve 4 also cools similarly 8 while locked up). Since the efficiency of the thermal connection between the anodic and cathodic outputs of the tablet valve is great, the effect of heat dissipation brought to the locked valve through the AC pin from the oppositely turned on valve is also great.

In addition, a pair of valves that conduct current at the same time (for the first bridge, these are valves 1.10; 1.9-, 2.8; 2, 10, etc.) are pressed to different coolers with opposite electrodes, this distribution of valves allows at any time moment to have only one valve on each cooler.

The proposed converter unit increases the heat transfer efficiency by 2-3 times, which allows to significantly reduce weight and size parameters or, while maintaining these parameters unchanged, use valves of a lower class of their current.

Claims (1)

Invention Formula The m-Fasn bridge reversing converter unit contains pill construction valves sandwiched between direct current leads that are simultaneously cooling and alternating current leads, two of which are cathodes, and two are anodes that reduce the dimensions of the device with natural air cooling, the current leads of the direct current are made of ribbed, and the current leads of the alternating current are made in the form of flat tires, and the valves pressed to each of the AC niches of the same name The houses belong to different bridges. P 15 t-niKg / 4 4 Editor I. Shulla Compiled by O. Nakazna Tehred M. Khodanych Order 1849 Circulation 442 VNIIPI State Committee for Inventions and Discoveries at the State Committee on Science and Technology (State Committee for Science and Technology) С (СР 113035, Moscow, Ж-35, 4/5 Raushsk nab. Production and Publishing Combine Patent, Uzhgorod, st. Gagarin, 101 Ote2 Proofreader T.Paly Subscription