12-pulse traction rectification phase-shifting dry-type transformer for urban rail

Abstract

The 12-pulse-wave traction rectification phase-shifting dry-type transformer for the urban rail comprises an A-phase primary coil, a B-phase primary coil and a C-phase primary coil, the A-phase primary coil is connected with a voltage UA, the B-phase primary coil is connected with a voltage UB, the C-phase primary coil is connected with a voltage UC, the phase difference between the UA and the UB is 120 degrees, and the phase difference between the UC and the UA is 120 degrees; the A-phase primary coil comprises a first main winding and a first phase-shifting winding, the first main winding is connected with the first phase-shifting winding, and the joint of the first main winding and the first phase-shifting winding is a first contact; the B-phase primary coil comprises a second main winding and a second phase-shifting winding, the second main winding is connected with the second phase-shifting winding, and the joint of the second main winding and the second phase-shifting winding is a second contact; the C-phase primary coil comprises a third main winding and a third phase-shifting winding. The 12-pulse-wave traction rectification phase-shifting dry-type transformer for the urban rail solves the problem that phase shifting cannot be achieved in the prior art.

Description

technical field [0001] The invention relates to a transformer, in particular to a 12-pulse traction rectification phase-shifting coherent transformer for urban rail. Background technique [0002] The Chinese patent discloses a single-body low-voltage interleaved 12-pulse rectifier transformer with application number CN201720841702.1. The transformer includes: a primary winding, a voltage regulating winding, a high-voltage winding, a phase-shifting winding and a low-voltage winding; the voltage regulating winding Multi-level continuous voltage regulation is realized through the on-load switch, and the high-voltage winding and the phase-shifting winding are connected and supplied with power; Although the transformer reduces the influence of harmonics on the power grid, the disadvantages of the transformer are: [0003] I don't know how the transformer realizes the phase shift, and I don't know whether the phase shift angle can be adjusted. SUMMARY OF THE INVENTION [0004]...

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a 12-pulse traction rectification phase-shifting coherent transformer for urban rail, which solves the problem that phase shifting cannot be realized in the prior art

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