Three-phase 24 pulse wave double-Y-shaped output winding phase-shifting rectifier transformer

Abstract

A three-phase 24 pulse wave double-Y-shaped output winding phase-shifting rectifier transformer comprises primary windings, secondary windings and a core. A connection mode of the primary windings adopts triangle, star, hexagon or extended-hexagon connection, and the primary windings are improved in that rated voltage of the primary windings is high voltage or low voltage. The secondary windings in each phase include a long-edge secondary winding, two middle short-edge secondary windings and two auxiliary short-edge secondary windings, the long-edge secondary windings in all phases are the same in turns, symmetrical and mutually unconnected, the middle short-edge secondary windings in all phases are the same in turns and symmetrical, the auxiliary short-edge secondary windings in all phases are the same in turns and symmetrical, the head end of the long-edge secondary winding in each phase is connected with the head ends of the middle short-edge secondary windings in other two phases, and the tail end of the long-edge secondary winding in each phase is connected with the tail ends of the auxiliary short-edge secondary windings in other two phases, so that three reversely connected double-Y-shaped windings are formed, each secondary winding is wound by metal foil or conductors in an insulating mode, and the rated voltage of each secondary winding is high voltage or low voltage. The primary winding and the secondary windings are in concentric or up-down arrangement on a core limb in each phase, and the core is a three-phase core in the shape of two stacked blocks or a triangle. The three-phase 24 pulse wave double-Y-shaped output winding phase-shifting rectifier transformer is simple in structure and energy-saving.

Description

technical field [0001] The invention relates to a three-phase rectifier transformer, in particular to a three-phase 24-pulse double Y-shaped output winding phase-shifting 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 transf...

AI Technical Summary

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

Images