A low-temperature test method for high-power converters

Abstract

The invention discloses a high-power current converter low-temperature testing method. According to the high-power current converter low-temperature testing method, a cooling tower is turned on afteran environmental cabinet is low-temperature stable, the cooling tower utilizes cold air in the environmental cabinet for cooling a current converter and a cooling liquid in the cooling tower, the temperature of the cooling liquid can be reduced to the low-temperature ambient temperature of the environmental cabinet rapidly through heat transfer, the cooling liquid cools components in the current converter rapidly at the same time, the heat balancing rate is greatly increased, the heat balancing time is shortened from 16-20 h to 8-10 h, and a lot of testing time and energy consumption are saved. The high-power current converter low-temperature testing method tests a full-power feature testing method of the high-power current converter in a low-temperature state, assesses the performance ofthe current converter and the cooling tower in the low-temperature state comprehensively, can effectively verify the adaptability of the current converter product in a low-temperature environment. Onthe premise that thermal load capacity of the environmental cabinet is large enough, the cooling tower is placed into the environmental cabinet for conducting a low temperature test, the low temperature start-up condition of the current converter is simulated in a most real manner, and the low temperature start-up performance of the current converter is verified truly and effectively.

Description

technical field [0001] The invention relates to the field of converter testing, and more particularly relates to a low-temperature testing method for a high-power converter. Background technique [0002] The converter is the core component of the rail transit vehicle. In order to better verify the adaptability of the converter to the low temperature environment, the performance test of the converter requires a low temperature test. According to the requirements of GB / 2423.1-2008, the low-temperature test first requires the converter to reach thermal equilibrium in a low-temperature environment without power on, and then conduct a low-temperature start-up test and performance test. [0003] The quality and volume of high-power converters are large and come with coolant with a large heat capacity. It takes a long time for the converter to reach thermal equilibrium during low-temperature tests. In order to more realistically assess the performance of the converter in a low-tem...

AI Technical Summary

Problems solved by technology

[0004] The main circuit of the current low-temperature test converter is not energized, and the cooling tower is placed outside the environmental chamber. Only after the low-temperature temperature stabilizes, provide DC110V power to the Traction Control Unit (TCU), and observe whether the TCU starts normally. , did not examine the full power characteristics of the converter at low temperature

Images