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Electric locomotive and traction circuit thereof

A technology for electric locomotives and traction circuits, which is applied in the field of rail transit and can solve the problems of reduced reliability and increased costs of train circuits

Active Publication Date: 2020-04-03
ZHUZHOU ELECTRIC LOCOMOTIVE CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the need to add an additional chopper boost circuit, it will increase the cost and reduce the reliability of the train circuit

Method used

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  • Electric locomotive and traction circuit thereof
  • Electric locomotive and traction circuit thereof
  • Electric locomotive and traction circuit thereof

Examples

Experimental program
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Embodiment Construction

[0055] The core of the invention is to provide a traction circuit of an electric locomotive, which is beneficial to reduce the cost of the traction circuit of the electric locomotive and ensure the reliability of the circuit. In addition, it is also conducive to improving the utilization rate of energy conversion.

[0056] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. Apparently, the described embodiments are only some of the embodiments of the present invention, but 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.

[0057] Please refer to figure 1 , figure 1 It is a structural schematic diagram of a tractio...

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Abstract

The invention discloses a traction circuit of an electric locomotive. The traction circuit comprises a traction transformer; first and second batteries; the storage battery charger charges the first storage battery and the second storage battery in a charging mode, and inverts the output current of the second storage battery into constant-voltage constant-frequency load power supply in a storage battery mode; when the first power supply circuit main body is in a contact network power supply mode, the electric energy of the contact network is converted to supply power to the first traction motor and the variable-voltage variable-frequency load; in the storage battery mode, the electric energy of the first storage battery is converted to supply power to the first traction motor and the variable-voltage variable-frequency load; when the second power supply circuit main body is in the contact network power supply mode, the electric energy of the contact network is converted to supply powerto the second traction motor and the constant-voltage constant-frequency load; and in the storage battery mode, the electric energy of the second storage battery is converted to supply power to the second traction motor. By applying the scheme, the cost is reduced, the reliability of the circuit is guaranteed, and the energy conversion utilization rate is increased. The invention further discloses an electric locomotive which has the corresponding effect.

Description

technical field [0001] The invention relates to the technical field of rail transit, in particular to an electric locomotive and its traction circuit. Background technique [0002] The traditional electric locomotive has a single form of power supply and relies heavily on catenary power supply. When it is disconnected from the catenary or the catenary line fails, the locomotive will stop running because it cannot receive current. Therefore, electric locomotives with auxiliary power are used more and more. For example, various forms of electric locomotives with auxiliary power, such as internal combustion engine-battery, internal combustion engine-supercapacitor, internal combustion engine-fuel cell, fuel cell-battery, and catenary-battery, have appeared at present. [0003] At present, for high-power locomotives powered by AC catenary, the traction electric drive system generally adopts AC-DC-AC structure, and the voltage of the intermediate DC link is generally between 180...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B61C3/00B61C3/02H02M5/458H02P27/06
CPCB61C3/00B61C3/02H02M5/4585H02P27/06Y02T30/00
Inventor 索建国康明明邹焕青雷欣赵玉玲贾岩鑫
Owner ZHUZHOU ELECTRIC LOCOMOTIVE CO
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