Converter automatic test system and method

Abstract

The invention discloses a converter automatic test system and method. The system comprises a master control machine, a programmable switch, a first programmable power source, a power contactor and a load contactor. The system can be used to provide power for a converter automatically, select the communication path and perform automatic low-voltage tests to obtain detection parameters under the control of the master control machine. For example, in low-voltage conditions, four-quardant rectifier module low-voltage pulse tests, inverter module low-voltage pulse tests, four-quardant rectifier module current sensor tests, inverter module current sensor tests, chopping module current sensor tests and inverter module direct-current side voltage sensor tests are performed on the converter automatically, through waveform parameters acquired by a programmable oscilloscope and values of current sensors and voltage sensors acquired by a control module, the test result of the converter can be judged accurately and test data can be stored, so that comprehensive and effective failure detection can be performed.

Description

technical field [0001] The invention relates to the technical field of power electronic converter testing, in particular to an automatic testing system and method for a converter. Background technique [0002] With the increasingly wide application of converters in the field of rail transit, as a main component in the design of rail vehicles, people put forward higher and higher requirements for the quality of converters. In order to ensure the factory quality of the converter, it is necessary to conduct several hours of power assessment tests in the factory of the converter to expose its quality problems and hidden dangers in advance. [0003] Due to the problems of high test cost, high test voltage and long test time, the existing power assessment test system often becomes the bottleneck process of product production, so the throughput rate has become an important index to measure the test system. In order to improve the throughput rate of the power assessment test system...

AI Technical Summary

Problems solved by technology

In the low-voltage test of the converter, there is no technical solution for the low-voltage automatic test of the converter in the prior art, and the traditional manual test is only limited to the low-voltage pulse test, and there are also shortcomings such as the following: low-voltage test coverage Insufficient, the voltage sensor and current sensor are not tested, and the fault cannot be detected comprehensively and effectively; there are a lot of manual operations and human judgments in the test process, which cannot guarantee the consistency of parameter settings and test results ; The test speed is slow, and the data in the test process cannot be stored and traced in a timely and effective manner

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