Multifunctional photoelectric signal acquisition device

Abstract

The invention relates to IGBT power device driving and feedback signal acquisition equipment, in particular to a multifunctional photoelectric signal acquisition device. The multifunctional photoelectric signal acquisition device is suitable for a single IGBT driving control signal and feedback signal photoelectric conversion circuit. The circuit is composed of a power supply conversion circuit, an IGBT driving signal photoelectric conversion circuit and an IGBT state feedback signal photoelectric conversion circuit. According to the multifunctional photoelectric signal acquisition device designed in the scheme, conversion between photoelectric signals can be conveniently carried out, the photoelectric signals in the product operation process can be conveniently monitored, and searching and analysis of product fault reasons are facilitated; the collection and analysis of a control signal and a protection signal of optical signal transmission are facilitated, the debugging of a new optical transmission product can be well completed, the efficiency of debugging and problem analysis is improved, and economic and social benefits are remarkable.

Description

technical field [0001] The invention relates to an acquisition device for driving and feedback signals of an IGBT power device, in particular to a multifunctional photoelectric signal acquisition device. Background technique [0002] In recent years, IGBT power devices have been more and more widely used in power conversion circuits. IGBTs work under high voltage and high current conditions, and the surrounding electromagnetic environment is very complicated. More and more drive signals from TCU to IGBT driver boards use optical signals. , which makes the acquisition of optical signal attenuation and correctness particularly necessary; at the same time, because the TCU-driven optical signal transmission of the 3000-horsepower light-mixed locomotive uses TT electronic transceivers, the existing optical fiber transceivers cannot match, which affects the project development process. Acquisition of timing sequence of drive and feedback signals of locomotive TCU controller. To s...

AI Technical Summary

Problems solved by technology

[0002] In recent years, IGBT power devices have been more and more widely used in power conversion circuits. IGBTs work under high voltage and high current conditions, and the surrounding electromagnetic environment is very complicated. More and more drive signals from TCU to IGBT driver boards use optical signals. , which makes the acquisition of optical signal attenuation and correctness particularly necessary; at the same time, because the TCU-driven optical signal transmission of the 3000-horsepower light-mixed locomotive uses TT electronic transceivers, the existing optical fiber transceivers cannot match, which affects the project development process. Acquisition of Timing Sequence of Driving and Feedback Signals of Locomotive TCU Controller

In summary, the current acquisition circuit has the following disadvantages: 1) It is inconvenient to use a separate power supply, and the test cannot be carried out when there is no external power supply outdoors

2) There is only one optical signal transceiver, which cannot meet the collection of IGBT signals for 3000 horsepower light hybrid locomotives

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