Auxiliary current transformer and control method thereof

A technology for auxiliary converters and converters, applied in control/regulation systems, converting DC power input to DC power output, and converting AC power input to DC power output, etc., which can solve problems such as large amplitude differences

Pending Publication Date: 2017-08-22
CHINA ACADEMY OF RAILWAY SCI CORP LTD +3
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In addition, the current subway power supply systems mainly include DC 750V and 1500V. Due to the large amplitude difference between the two power supply systems, the existing subway auxiliary converter main circuit topology design and device selection are usually only suitable for a certain type of power supply. format

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  • Auxiliary current transformer and control method thereof
  • Auxiliary current transformer and control method thereof
  • Auxiliary current transformer and control method thereof

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Embodiment Construction

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0034] Those skilled in the art know that the embodiments of the present invention can be implemented as a system, device, device, method or computer program product. Therefore, the present disclosure may be embodied in the form of complete hardware, complete software (including firmware, resident software, microcode, etc.), or a combination of hardware and software.

[0035] The principle and spirit of the present invention will be explained in ...

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Abstract

The invention provides an auxiliary current transformer and a control method thereof. The auxiliary current transformer comprises an input switch pre-charging unit, an input filtering unit, a preceding voltage increasing unit, two middle frequency isolation DC/DC current transformers, a three-phase inversion unit, an output filtering unit and an external output control unit. The input switch pre-charging unit comprises two pre-charging resistors. The pre-charging resistors are serially connected or parallelly connected with each other. The preceding voltage increasing unit comprises two paths of boost voltage increasing modules. The boost voltage increasing modules are serially connected or parallelly connected with each other. The middle frequency isolation DC/DC current transformers are connected with the boost voltage increasing modules and used for carrying out middle frequency inversion on direct current voltage output by the boost voltage increasing modules to generate middle frequency square-wave voltage and carrying out isolation voltage transformation on the middle frequency square-wave voltage and rectifying the middle frequency square-wave voltage into direct current voltage. The middle direct current voltage output by the middle frequency isolation DC/DC current transformers are parallel connected and then input into a three-phase inversion unit.

Description

technical field [0001] The invention relates to the field of rail transit vehicle equipment, in particular to a subway auxiliary converter and a control method thereof. Background technique [0002] Auxiliary converter is an important on-board equipment of rail vehicles, which can provide AC power for three-phase loads such as vehicle air conditioners and air compressors and some single-phase loads. Traditional auxiliary converters mostly use power frequency transformer isolation and hard-switching intermediate frequency transformer isolation. After the DC power is converted into three-phase AC power by the power frequency isolation method, the power frequency transformer is converted into a three-phase power frequency power output. Because the power frequency transformer has a low operating frequency, this type of transformer usually has a large volume and weight. [0003] In addition, the current subway power supply systems mainly include DC 750V and 1500V. Due to the lar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/537H02M3/338
CPCH02M3/33561H02M3/3381H02M7/537
Inventor 马颖涛董侃刘东辉杨二林李玉山王骁刘伟志姚文革左鹏李水昌齐鹏宇王营
Owner CHINA ACADEMY OF RAILWAY SCI CORP LTD
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