SU1494074A1 - Multiphase rectifier - Google Patents

Abstract

The invention relates to semiconductor converter technology and can be used in the construction of high-power rectifying installations designed for electrical transmission of AC-DC locomotives. The purpose of the invention is to reduce the size of the rectifier and increase reliability by improving the current distribution across the diodes. This is achieved by the fact that common chillers 1 and 2, which are simultaneously DC busbars, are equipped with parallel-connected diodes 3 and fuses 4, which are connected to the AC buses 6 through the distribution busbars 5. to a friend in a package through insulating pads 7, mounted on an insulating panel 8. In the proposed design, the rectifier active and inductive resistances of the distribution bus for any of the parallel-connected shoulder diodes are among themselves, therefore, an even current distribution over the diodes is ensured. 2 Il.

Description

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The invention relates to semiconductor converter technology and can be used in the construction of high-power rectifying systems designed for electrical transmission of AC-DC locomotives.

The purpose of the invention is to reduce the size of the rectifier and increase the reliability by improving the current distribution across the diodes.

Figure 1 shows a three-phase rectifier, a common fork; figure 2 - section A-L in figure 1.

The multiphase rectifier is a design (Figures 1 and 2), consisting of common coolers 1 and 2, KOTOpi.ie are simultaneously DC collector buses, diodes 3 and fuses 4 are installed on the CPU coolers, which through distribution tires 5 are connected to ac lines 6. AC buses 6 are assembled wide sided to each other in a package through insulating pads 7 and mounted on an insulating panel 8 between chillers 1 and 2. Liodes 3 on the first collector bus, for example 1, are connected through fuse 4 to the distribution bus anode, and on the second Dtniie 2 tokosbornoy - cathode.

The device operates as follows: 1M.

When AC voltage is connected to 6, the load current of the rectifier flows from the AC buses through the distribution bus 5 to the pair / shells of the diodes 3 and fuses 4 connected and through the DC anode current collector 2. 15 cathode bus collector 1 direction of the blind current is the opposite.

In the proposed construction of the upper section, the active and inductive resistances of the distribution bus 5 for any of the parallel-connected shoulder diodes are equal, since the m-n segment of the distribution bus 5 is common to all four parallel branches, and the points K and K |. connecting the diodes located on the taps 9 of the distribution bus is equidistant. from the branch point p of the distribution pins, therefore, the current is distributed evenly across the diodes. AC buses 6, assembled in the form of a package, provide compensation for electromagnetic fields, which also improves the current distribution in the rectifier. The proposed design makes it possible to reduce the overall volume of diesel rectifiers by approximately 30%, and to reduce the weight by 40% as compared with the known diesel locomotive designs with improved current distribution over parallel-connected diodes. With a uniform distribution of current across the diodes, the reliability of M} of south-phase No. 1 teles for diesel locomotives is increased.

The proposed KOHCTPYKJUIH allows the inclusion of parallel-connected diodes in the shoulder for 2,3,4,5, etc., which allows you to create a number of sizes for diesel locomotives of different power Two sets of rectifiers are installed for each section of the locomotive, since the power source is two three-phase stars, shifted le to 30 e. hail.

Claims (1)

Formula of Found A multi-phase rectifier containing common chillers, DC current collector buses, parallel-connected power supplies installed on them and fuses, AC buses assembled in a package, insulating panels, characterized in that, in order to reduce overall dimensions rectifier and increase reliability by improving the current distribution across the diodes, it is equipped with distribution troughs, and the AC current is located on the insulation panel perpendicular to the coolers, the diodes of each phase are symmetrical to The AC busbars are located on opposite sides and electrically connected to them through distribution wiring, each of which is made with taps, perpendicular to its middle part, common to all the diodes of the corresponding ase, diodes attached to the taps at the same distance from the longitudinal axes of the middle part of the distribution bus. TA one