Transformer for output of high-voltage high-power converter

Abstract

The present invention is a transformer used for the output of a high-voltage high-power converter. The transformer includes an iron core, a high-voltage coil and a low-voltage coil respectively wound on the iron core column of the iron core, and respectively arranged between the iron core, the high-voltage coil and the low-voltage coil. The high-voltage coil adopts a two-column parallel structure and adopts a multi-layer structure; the low-voltage coil is divided into several parts, cross-connected in series, each part adopts a single-layer structure, and is evenly distributed on several core columns; There is a 15 to 25mm airway in the middle of the main stage; the wires of the high-voltage coil and the low-voltage coil adopt combined transposition wires; the turn insulation of the high-voltage and low-voltage coils adopts a double insulation structure of non-woven fabric and polyimide paint film. Resin is poured on it. Each component of the invention guarantees the operation of the pulse width modulation waveform of the transformer connected to the primary side of the transformer, the change of impulse voltage du / dt not less than 6000V / μs, the change of voltage (0~20kV), and the change of frequency (0~300Hz) Electrical life, insulation life and structural life under operating conditions such as mode.

Description

technical field [0001] The invention relates to an output transformer technology, in particular to a transformer used for the output of a high-voltage high-power converter and a detection method for its impact resistance strength. Background technique [0002] At present, the transformers in the prior art usually operate under the condition of rated voltage level, rated frequency (50 Hz) and sine wave, and the transformers in the prior art are not suitable for the transformer connected to the output terminal of the converter. In particular, it cannot meet the requirements for output transformers of high-speed maglev traffic with several MVAs to tens of MVAs of high-power traction converters. [0003] As a transformer connected to the output terminal of the converter, the design and manufacture of the transformer in the prior art cannot satisfy the pulse width modulation waveform connected to the primary side of the transformer, the change of the impulse voltage du / dt is not ...

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Problems solved by technology

[0002] At present, transformers in the prior art usually operate under rated voltage level, rated frequency (50Hz), and sine wave conditions, and transformers in the prior art are not suitable for connecting to Transformer at the output of the converter

In particular, it cannot meet the requirements of output transformers for high-speed maglev traffic with several MVAs to dozens of MVAs and high-power traction converters

[0003]As a transformer connected to the output terminal of the converter, the design and manufacture of the transformer in the prior art cannot satisfy the pulse width modulation waveform and the impact voltage change du / dt not less than 6000V / μs, high voltage side voltage change (0~20kV), frequency change (0~300Hz) operation mode and other requirements

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