IGBT drive fault detection and diagnosis method

Abstract

The invention relates to an IGBT drive fault detection and diagnosis method. An IGBT driver board generates a fault and transmits a fault signal to an driving unit of a control system; the driving unit carries out real-time fault signal monitoring, and when detecting the fault signal transmitted by the IGBT driver board, the driving unit acquires the fault signal output by the IGBT driver board, carries out analysis and logic judgment according to the appearance of the fault signal, and outputs a protection control signal; a communication device of the control system transmits the protection control signal output by the driving unit to other related systems; a prompt device receives the protection control signal output by the communication device and intuitively presents a fault solution; an operator carries out corresponding operation according to the cause of the fault; and after the fault is removed, the control system is repowered on, and the driving unit restarts fault signal monitoring. The time for fault removing is shortened, the running stability of equipment is improved, and good running performance is achieved.

Description

technical field [0001] The invention belongs to the technical field of converter control, and more specifically relates to a driving fault detection and diagnosis method using an IGBT as a conversion unit. Background technique [0002] The application fields of converters are becoming more and more extensive, and the power conversion devices are mostly IGBTs. However, there are still many technical bottlenecks restricting the industrialization and commercialization of converters. Among them, IGBT drive technology is one of the prominent factors restricting the development of converters. The safe and stable operation of IGBT drive modules is the key factor affecting converters. The most critical factor of the overall performance, but due to application requirements, the converter generally works in a state of high voltage and high current, and if the fault caused by the instantaneous state mutation is not detected or judged in time and protected, it will cause serious faults....

AI Technical Summary

Problems solved by technology

However, if the drive failure is stopped rashly without analysis and judgment, the running time of the equipment will be reduced, which will affect the economic benefits of the equipment, and direct shutdown is not the best way to deal with it, and it will also cause damage to the equipment in severe cases. Moreover, Failure to analyze and judge the cause of the failure will also increase the difficulty of later maintenance and investigation, prolong the analysis and investigation time, and indirectly affect the economic benefits of the equipment

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