Intermediate-frequency auxiliary converter simulation system

Abstract

The invention provides an intermediate-frequency auxiliary converter simulation system. The system comprises an upper computer, a simulation machine, a signal conversion interface device and an intermediate-frequency auxiliary controller, wherein the upper computer is in communication connection with the simulation machine, the simulation machine is connected with the signal conversion interface device and the intermediate-frequency auxiliary controller, and the signal conversion interface device is connected with the intermediate-frequency auxiliary controller; the simulation machine is usedfor loading a preset intermediate-frequency auxiliary converter simulation model and outputting a digital simulation signal, the signal conversion interface device converts the digital simulation signal into an analog simulation signal and sends the analog simulation signal to the intermediate-frequency auxiliary controller; the intermediate-frequency auxiliary controller is used for generating apulse signal and a digital control signal according to the analog simulation signal and feeding back the pulse signal and the digital control signal to the simulation machine; and the upper computer is used for obtaining a simulation waveform according to the digital simulation signal. According to the intermediate-frequency auxiliary converter simulation system provided by the embodiment of the invention, the test cost of the intermediate-frequency auxiliary converter is reduced.

Description

technical field [0001] The invention relates to the technical field of automatic testing, in particular to an intermediate frequency auxiliary converter simulation system. Background technique [0002] Auxiliary converter is an important on-board equipment of rail vehicles, which can provide AC power for three-phase loads such as vehicle air conditioners and air compressors and some single-phase loads. [0003] The traditional auxiliary converter mostly adopts the working mode of power frequency transformer isolation and hard switching of switching devices. In the existing technology, intermediate frequency auxiliary converters appear, which adopt the working mode of intermediate frequency transformer isolation (5kHz ~ 100kHz) and soft switching of switching devices , compared with the traditional auxiliary converter, it has the advantages of reducing system loss, reducing the volume and weight of the system. However, compared with traditional auxiliary converters, there ar...

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Problems solved by technology

However, compared with traditional auxiliary converters, there are more conversion links in the main circuit topology of intermediate frequency auxiliary converters, such as DC / DC conversion modules, H-bridge inverter modules, diode rectification modules, etc., and the overall system is more complicated. In addition to providing a controllable external power supply environment and load environment in the test phase of the whole machine, it is also necessary to detect and record the voltage and current waveforms of the intermediate frequency auxiliary converter in real time. Higher requirements are put forward, which increases the testing cost of the product

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