Three-phase 24-pulse single-output winding phase-shifting rectifier transformer

Abstract

The invention provides a three-phase 24-pulse single-output winding phase-shifting rectifier transformer, which comprises a primary winding, secondary windings and an iron core. The improvement of the transformer lies in that the wiring way of the primary winding is a triangular, starlike, hexagon or edge hexagon wiring way, and the rated voltage is low voltage or high voltage; the secondary windings are three phases of secondary windings of which all the phases are identical and symmetrical; the three phases of secondary windings are formed by winding metal foil or conductors which are subjected to insulation; each phase of secondary winding is provided with two coils with different numbers of turns; each coil is provided with two center taps; the twelve taps of the six coils of the three phases, x1', a1, y1', b1', z1, c1', x2', a2', y2', b2', z2 and c2'are connected to form an unequal hexagon with twelve edges and twelve alternating current output ends, the rated voltage of which is low voltage or high voltage; the primary winding and the secondary windings are arranged on each phase of iron core post concentrically or up and down; and the iron core is a three-phase iron core which is shaped like a Chinese character 'Ri' or 'Pin'. The three-phase 24-pulse single-output winding phase-shifting rectifier transformer adopts the structural form and wiring way of a new winding, and has the advantages of little material consumption, small size, low cost, low internal loss and the like.

Description

technical field [0001] The invention relates to a three-phase rectifier transformer, in particular to a three-phase 24-pulse single-output winding phase-shift rectifier transformer. Background technique [0002] At present, in order to suppress the interference of the high-order harmonic current generated by the rectification device to the power grid, the multi-pulse phase-shifting rectification technology is often used. The main principle is to connect the secondary winding of the three-phase rectifier transformer into n-way (n-phase) AC output terminals with a certain phase difference, and connect it to the n-phase rectifier bridge, so that the current waveform in the DC output circuit of the rectifier bridge has 2n A pulsation waveform (abbreviated as pulse number). The higher the number of pulses, the smaller the AC component in the DC circuit, and the lower the high-order harmonic current content in the AC circuit on the primary side of the rectifier transformer. Theo...

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Problems solved by technology

The larger the number of transformers or the number of output winding groups, the larger the volume, the more material consumption, and the higher the cost and internal loss of the rectifier device

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