A single-phase transformer with multi-combination conversion of series and parallel windings

Abstract

The invention provides a single-phase transformer capable of switching multiple series-parallel winding combinations. A left inner winding (2-1) and a right inner winding (2-2) of the same turns are arranged in an inner coil, and the left inner winding and the right inner winding are same in structure and opposite in winding direction and are connected with each other in parallel; an outer coil comprises left outer windings and right outer windings which are arranged on the exterior of the left inner winding (2-1) and the exterior of the right inner winding (2-2) respectively; the left outer windings comprise the first winding (1-1), the second winding (1-2) and the third winding (1-3) which are sequentially arranged from top to bottom, and the right outer windings comprise the fourth winding (1-4), the fifth winding (1-5) and the sixth winding (1-6) which are sequentially arranged from top to bottom; the structures of all the windings of the outer coil are same, the three left outer windings and the three right outer windings are opposite in winding direction; all the windings of the outer coil form an output winding, the different series-parallel combinations are switched through a voltage regulating switch, different voltages and currents are output, and the output capacity keeps invariable. According to the single-phase transformer, the voltage regulating range is wide, and requirements of electrical tests under different test conditions can be met.

Description

technical field [0001] The invention belongs to the technical field of transformers, and relates to a single-phase transformer, in particular to a single-phase transformer with multi-combination conversion of series and parallel windings. Background technique [0002] The voltage and current of the single-phase test power supply required for electrical tests of various power transmission and transformation equipment, including transformers, reactors, transformers, etc., are different, and some of them have a relatively large range of variation, which cannot be satisfied only by generator sets or voltage regulators. Test requirements. The voltage regulation range of the current test intermediate transformer is small, usually only ±5%, and the voltage regulation range is small, which causes the problem that it cannot meet the test requirements. Contents of the invention [0003] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prio...

AI Technical Summary

Problems solved by technology

[0002] The voltage and current of the single-phase test power supply required for electrical tests of various power transmission and transformation equipment, including transformers, reactors, transformers, etc., are different, and some of them have a relatively large range of variation, which cannot be satisfied only by generator sets or voltage regulators. Test requirements

The current test intermediate transformer has a small voltage regulation range, usually only ±5%, and the voltage regulation range is small, resulting in the problem that it cannot meet the test requirements.

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