Detecting and testing device and method for inverter or charger

Abstract

The invention discloses a detecting and testing device and method for an inverter or a charger. The detecting and testing device comprises a power supply host, a detection system and a module to be detected, and is characterized in that the module to be detected comprises a three-phase inverter detection module I for simulating a dining car, or a three-phase inverter detection module II for simulating a local train, or a detection module III for testing a uniform single-phase inverter, a uniform charger, a non-uniform single-phase inverter and a non-uniform charger; the power supply host and the detection system 2 are electrically connected, the power supply host comprises a DC power supply generation unit arranged at the upper layer, a simulated neutral-section passing unit arranged at the middle layer and a monitoring unit arranged at the lower layer; and the detection system comprises a chassis assembly with a box-type structure, a control panel arranged at the front end face of the chassis assembly and a detection unit installed inside the chassis assembly. The detecting and testing device has the characteristics of simple structure, convenient operation, stable quality, accurate judgment, wide test object, high adaptability and the like.

Description

Technical field [0001] The invention relates to the technical field of train component detection, in particular to a detection test equipment and a method for a train's inverter or charger. Background technique [0002] Inverter is a voltage transformation device that converts direct current into alternating current. It is a process of voltage inversion. The inverter converts DC power (battery, storage battery) into AC power (usually 220V, 50Hz sine wave). It is composed of inverter bridge, control logic and filter circuit. It is widely used in air conditioners, computers, TVs, home appliances, fans and lighting, etc. The inverters include single-phase inverters or three-phase inverters. Three-phase inverters are a large-scale power supply used in uninterrupted power supply systems. For the power inverter, the working mode of any one phase of its three-phase output and the neutral line N is basically the same as that of the half-bridge conversion circuit. The phase difference ...

AI Technical Summary

Problems solved by technology

However, due to the compact structure of the inverter or the charger, it is installed in a relatively narrow space, it is difficult to disassemble the module, and the maintenance work is very difficult. At present, all maintenance is carried out on the vehicle, and it is impossible to work in rainy days. The site environment is affected by the maintenance. Restrictions, in case of a difficult fault, it must be disassembled as a whole for maintenance. Manual support and adjustment are required during the disassembly process, which is time-consuming and laborious. For example, only repairing and replacing an inverter or charging module requires at least 2 skilled workers and costs 7 ~8 hours, the work efficiency is low. Moreover, the over-phase simulation test of the existing bus DC600V inverter simulation test device is relatively simple, and the over-phase simulation cannot be automatically simulated, and the output of the DC600V power supply must be manually operated.

Usually, only one to three simulated phase-separation tests are done manually, which cannot reflect the actual working conditions of the DC600V inverter power supply device. It often happens that the ground test is good, and the marshalling fails after running for a certain period of time; moreover, the existing test device Does not have automatic monitoring function, test data rely on manual recording, data recording reliability is not high, low efficiency

In addition, when working outdoors, peripheral high-voltage circuits and other equipment must be assisted to work, and the connection of high-voltage power supply is very difficult, and there is a high probability of electric shock danger. The above problems are difficult to meet the transportation requirements of trains.

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