Traction power device

A technology of a power unit and a traction inverter, which is applied to circuit units, battery circuit units, output power conversion units, etc., can solve the problems of high cost, high volume and weight, etc., and can improve the level of light weight and system integration. High, easy to cut or expand the effect

Pending Publication Date: 2017-08-18
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

[0005] The embodiment of the present invention provides a traction power device to solve the problems of the existing traction power unit with large volume, weight and high cost difficulty

Method used

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specific Embodiment approach

[0046] Figure 5 and Figure 6 It is the circuit structure diagram of two specific embodiments of the traction power device of the present invention. The specific implementation is as follows:

[0047] The traction power unit of this embodiment includes two identical sets of rectifiers 1.7 and 2.7 and two identical sets of inverters 1.12 and 2.12, and their DC buses are all connected together. The auxiliary converter unit includes two sets of choppers 8 and 9, of which Figure 5 The illustrated embodiment uses a boost chopper, Figure 6 The shown embodiment adopts step-down chopper, two sets of intermediate frequency isolated DC / DC converters 12 and 13 , one set of auxiliary inverter 5 , one set of sinusoidal filter 6 , and one set of charger 17 .

[0048] 1. The traction transformer has two sets of secondary side windings, which are respectively connected to the input interfaces 1.1 and 2.1 of the power unit through cables, and then connected to the AC inputs of rectifier...

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Abstract

The invention provides a traction power device which comprises a rectifier, a traction inverter and an auxiliary current converting unit; wherein the rectifier is connected with a traction transformer secondary side winding on a train and is used for rectifying single-phase alternating current of the traction transformer secondary side winding into direct current; the traction inverter is used for inverting the direct current into frequency amplitude controllable alternating current to tract a motor; the auxiliary current converting unit comprises a chopper, an medium frequency isolation DC/DC converter, an auxiliary inverter and a sine filter; the chopper is used for regulating the voltage of direct current; the medium frequency isolation DC/DC converter is used for performing medium frequency inverter on direct voltage outputted by the chopper, isolation transforming is performed on the square-wave voltage of the medium frequency, and the square-wave voltage is rectified as low voltage direct current; the auxiliary inverter is used for inverting the low voltage direct current into three-phase power frequency alternating current; the sine filter is connected with the auxiliary inverter and is used for filtering the three-phase power frequency alternating current to generate sine three-phase alternating current for providing alternating current load of the train.

Description

technical field [0001] The invention relates to rail transit vehicle-mounted equipment, in particular to traction power devices for high-speed EMUs and intercity EMUs. Background technique [0002] The traction power unit is the core component of high-speed EMUs and intercity EMUs, which provides power and on-board power for trains. figure 1 It is a structural schematic diagram of an existing traction power unit. Such as figure 1 As shown, the input of the traction power unit is the single-phase alternating current of the secondary side winding of the traction transformer, which is converted into direct current through the rectifier, and then converted into three-phase variable frequency and variable voltage alternating current through the traction inverter, which is sent to the traction motor to realize traction and electric braking. The auxiliary inverter converts the direct current into three-phase alternating current, realizes voltage transformation and isolation thro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M5/458H02M3/335H02P27/06H02J7/00H02M1/14
CPCH02J7/00H02M1/14H02M3/33523H02M5/4585H02P27/06
Inventor 马颖涛董侃陶元之李水昌宋术全王骁刘阳刘冰宫帅刘伟志刘东辉
Owner CHINA ACADEMY OF RAILWAY SCI CORP LTD
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