High-power permanent magnet direct-drive freight locomotive modular traction converter

A technology of traction converter and permanent magnet direct drive, which is applied in the direction of converting AC power input to AC power output, locomotives, motor vehicles, etc. Types and other issues

Inactive Publication Date: 2021-04-30
CRRC YONGJI ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention aims at the problem that the traction converter of the traditional high-power freight electric locomotive cannot be directly applied to the permanent magnet direct drive electric transmission system, and the converter is not modularized or unified. The invention provides a high-power permanent magnet direct drive Freight Locomotive Modular Traction Converter

Method used

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  • High-power permanent magnet direct-drive freight locomotive modular traction converter
  • High-power permanent magnet direct-drive freight locomotive modular traction converter
  • High-power permanent magnet direct-drive freight locomotive modular traction converter

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specific Embodiment

[0035] The traction converter cabinet of the specific embodiment is equipped with 2 sets of traction devices, and each set of traction devices consists of 1 pre-charging circuit, 1 four-quadrant power module, 1 set of intermediate circuit, 1 inverter power module and 1 isolation contactor Each traction device drives a permanent magnet synchronous motor (axis control). The electrical principle and structure of the two sets of traction devices are identical, and the cooling systems are independent of each other, increasing the redundancy of the system.

[0036] On the basis of the converter of this scheme, modular expansion can be carried out according to the needs, for example, it can be expanded to 3 sets of traction devices, and the cooling system can choose a shared water cooling system or an independent water cooling system.

[0037] The auxiliary converter takes power from the intermediate DC link of the 2nd axis (or 4th axis) of the traction converter. The intermediate ci...

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Abstract

The invention relates to freight locomotive traction converters, in particular to a high-power permanent magnet direct-drive freight locomotive modular traction converter. A traction device is installed in a traction converter cabinet, the traction device is composed of a pre-charging circuit, a four-quadrant power module, a set of intermediate circuit, an inversion power module and an isolation contactor, and the traction device drives a permanent magnet synchronous motor. The two sets of traction devices are identical in electrical principle and structure, cooling systems are independent of each other, and the redundancy of the systems is increased. As the permanent magnet direct drive traction system has the advantages of high efficiency, high power density, full life, low cost, low noise and the like, the development direction of high efficiency, energy conservation and environmental protection at present is represented, and the high-power permanent magnet direct-drive electric locomotive converter serves as a core device of a permanent magnet direct-drive electric transmission system. According to the invention, the key technology of a high-power high-torque freight permanent magnet direct-drive electric transmission system can be broken through, energy can be saved for rail transit vehicles, environmental protection is realized, and economic benefits are brought.

Description

technical field [0001] The invention relates to a freight locomotive traction converter, in particular to a high-power permanent magnet direct drive freight locomotive modular traction converter. Background technique [0002] In recent years, green, safety, and energy saving have become the key development directions of rail transit vehicle equipment. Compared with the traditional asynchronous motor electric drive system, the permanent magnet direct drive electric drive system has obvious energy-saving effect under all working conditions, and solves the problems caused by gear transmission. Problems such as transmission loss, noise and maintenance can avoid environmental pollution problems caused by the use of gearbox lubricating grease, and further improve traction transmission efficiency, which is the development direction of the future traction system. [0003] At present, high-power freight electric locomotives all adopt asynchronous AC drive system. The transmission co...

Claims

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Application Information

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IPC IPC(8): H02M5/458H02P27/06H02P23/06H02P25/024H02P25/028B61C3/00
CPCH02M5/4585H02P27/06H02P23/06H02P25/024H02P25/028B61C3/00H02P2207/05
Inventor 徐亚昆王雷李锦郑旭阳李岩宋佩利杨玺
Owner CRRC YONGJI ELECTRIC CO LTD
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