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

A permanent magnet direct drive and converter technology, which is applied in the conversion of AC power input to AC power output, output power conversion device, motor control, etc., can solve the high cost of permanent magnet electric drive system and the inability of traction converter Problems such as direct application of permanent magnet direct drive electric drive system

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

[0005] Aiming 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 drive system, and the cost of the permanent magnet electric drive system is high, a high-power permanent magnet direct drive freight locomotive traction converter is provided

Method used

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

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specific Embodiment

[0027] The traction converter cabinet of the specific embodiment is equipped with 2 sets of traction devices, and each set of devices consists of 1 pre-charging circuit, 1 four-quadrant module, 1 four-quadrant + chopper module, 1 set of intermediate DC link and 1 three-phase Composed of inverters, driving 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.

[0028] 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.

[0029] The auxiliary converter takes power from the intermediate DC link of the 2nd axis (or 4th axis) of the traction converter. The intermediate circuit is re...

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Abstract

The invention relates to a freight locomotive traction converter, in particular to a high-power permanent-magnet direct-drive freight locomotive traction converter. The high-power freight permanent-magnet direct-drive electric locomotive converter adopts two groups of independent traction main circuits, and each group of traction main circuits comprises a pre-charging function circuit, a four-quadrant power module, a four-quadrant chopping module, an independent intermediate loop, a traction inversion power module and a three-pole isolation contactor. Two sets of identical traction devices are arranged in one converter cabinet, and the shaft power output is larger than 1200kW, therefore the traction converter is suitable for permanent magnet direct drive system electric locomotives. 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 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, all high-power freight electric locomotives adopt asynchronous AC transmission system. The transmission cont...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M5/458H02H7/12H02P25/028H02M1/32B61C9/38
CPCH02M5/4585H02H7/1216H02P25/028H02M1/32B61C9/38H02P2207/05
Inventor 徐亚昆孙湘漪刘立刚王雷杨璐柴媛苑伟华景晓东
Owner CRRC YONGJI ELECTRIC CO LTD
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