Auxiliary converter applicable to double voltage system and control method of auxiliary converter

An auxiliary converter and double-press technology, which is applied in the field of rail transit, can solve the problems of unrealized dual-press support, etc., and achieve the effects of light weight, reduced failure time, and capacitor voltage balance

Active Publication Date: 2022-02-08
CRRC QINGDAO SIFANG ROLLING STOCK RES INST
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  • Abstract
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  • Claims
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Problems solved by technology

At the same time, the front-stage DC-DC circuit uses a high-frequency isolation transformer to replace the traditional power-frequency transformer, which greatly improves the volume and weight of the entire system. dual pressure support

Method used

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  • Auxiliary converter applicable to double voltage system and control method of auxiliary converter
  • Auxiliary converter applicable to double voltage system and control method of auxiliary converter
  • Auxiliary converter applicable to double voltage system and control method of auxiliary converter

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Embodiment Construction

[0048] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0049] figure 1 It is a schematic diagram of the structure of an auxiliary converter module suitable for dual-pressure mode provided by Embodiment 1 of the present invention, figure 2 A schematic diagram of the circuit structure suitable for dual-voltage auxiliary converters provided by Embodiment 1 of the present invention, figure 2 for figure 1 The specific circuit principle structure, such as figure 1 , 2 As shown, the auxiliary converter includes: a pre-charging unit, an A-way unit module, a B-way unit module and an SIV...

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Abstract

The embodiment of the invention relates to an auxiliary converter applicable to double voltage system and a control method of auxiliary converter. The auxiliary converter comprises a pre-charging unit, an A-path unit module, a B-path unit module and an SIV inversion unit. According to the auxiliary converter and the control method thereof provided by the invention, DC-AC conversion support of two voltage systems can be realized, and any component of the converter does not need to be replaced.

Description

technical field [0001] The invention relates to the technical field of rail transit, in particular to an auxiliary converter suitable for a dual-compression type and a control method thereof. Background technique [0002] Two DC voltage systems of DC1500V and DC750V are often used in urban rail vehicles. Generally speaking, the auxiliary converters under the two voltage systems cannot be used universally, because the voltage levels of their power devices and even the circuit topology are different. At present, the mainstream auxiliary converter topology is divided into two types. One is single-stage three-phase inverter topology, which directly inverts the DC voltage of the power grid into AC380V AC. The volume and weight of the machine are large, and the power density is low. In addition, when the single-stage three-phase inverter topology is applied to different voltage systems, switching devices with different withstand voltage levels and power frequency transformers wit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/158H02M3/335H02M7/5387H02J9/06
CPCH02M3/158H02M3/33569H02M7/5387H02J9/062Y02T10/70
Inventor 何俊鹏李文慧张润泽毕京斌夏猛
Owner CRRC QINGDAO SIFANG ROLLING STOCK RES INST
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