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Single-phase inverter for motor train unit

A single-phase inverter, EMU technology, applied in the field of inverter, single-phase inverter, EMU, can solve the problems of high cost, large volume, etc., achieve the effect of light weight, small size, and reduce THD

Inactive Publication Date: 2017-02-22
CRRC QINGDAO SIFANG ROLLING STOCK RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims at the above-mentioned problems of large volume and high cost in the existing single-phase inverters for EMUs, and provides a single-phase inverter for EMUs with small size, light weight and low cost

Method used

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  • Single-phase inverter for motor train unit
  • Single-phase inverter for motor train unit
  • Single-phase inverter for motor train unit

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Embodiment Construction

[0026] Hereinafter, the present invention will be described in detail through exemplary embodiments. However, it should be understood that without further description, the elements, structures, and features in one embodiment can also be beneficially combined into other embodiments. In addition, the terms "first", "second", "third", "fourth", "fifth", "sixth", "seventh" and "eighth" are only used for descriptive purposes and cannot be understood as indicating Or imply relative importance.

[0027] See figure 1 In an embodiment of the present invention, a single-phase inverter for EMUs is provided, including a DC / DC boost unit and an inverter unit connected in sequence, and the input end of the DC / DC boost unit is connected to DC110V Voltage input. The DC / DC boost unit boosts the input voltage of DC110V to DC340V and transmits it to the inverter unit, and the inverter unit inverts the boosted DC340V voltage to AC220V voltage output.

[0028] In order to boost the input voltage fro...

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Abstract

The invention relates to a single-phase inverter for a motor train unit. The single-phase inverter comprises a DC / DC boost unit and an inverter unit that are connected successively. The input terminal of the DC / DC boost unit is connected with a DC 110-V voltage input. The DC / DC boost unit consists of a phase-shift full-bridge soft switching circuit, a transformer T1 and a rectifier filter circuit that are connected successively; and the phase-shift full-bridge soft switching circuit includes a first IGBT module Q01 and a second IGBT module Q2 that are connected in parallel and each IGBT module includes two IGBTs connected in series and two diodes connected with the IGBTs in parallel. One end of a primary side of the transformer T1 is connected between the first IGBT and the second IGBT and the other end is connected between the third IGBT and the fourth IGBT; each IGBT is connected in parallel with a capacitor; and a primary-side equivalent inductor of the transformer T1, a first capacitor C31, a second capacitor C32, a third capacitor C33, and a fourth capacitor C34 form a resonance circuit. According to the invention, the provided single-phase inverter based on a control strategy of first boosting and second inversion has characteristics of small size, light weight, and low cost.

Description

Technical field [0001] The invention belongs to the technical field of power conversion, and relates to an inverter, specifically, to a single-phase inverter capable of converting DC110V direct current into AC220V alternating current, and is suitable for EMUs. Background technique [0002] Inverter is a converter that converts DC electric energy into AC electric energy. It consists of an inverter bridge, a control system and a filter circuit. The working principle of the existing single-phase inverter for EMUs is that the DC input voltage DC110V is directly inverted through the full bridge, and then a power frequency transformer is used to achieve boost and electrical isolation, so that the AC output voltage of the inverter is AC220V . The power supply topology in this way, due to the use of a power frequency transformer, makes the inverter large in size, heavy in weight, and relatively expensive and costly. Summary of the invention [0003] Aiming at the above-mentioned problem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/537H02M3/335
CPCH02M7/537H02M3/3353
Inventor 申磊位俊雷张利军邵春伟徐哲崔晓光
Owner CRRC QINGDAO SIFANG ROLLING STOCK RES INST
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