Integrated IGBT special drive circuit

Abstract

The invention relates to the technical field of integrated drive circuits, specifically to an integrated IGBT special drive circuit including a power supply. The power supply is connected with the input end of a microprocessor through a power supply module, the output end of the microprocessor is connected with IGBT through a switch unit, and a filtering unit is arranged between the switch unit and the IGBT. In such a structure, the integrated IGBT special drive circuit can control on / off of a thyristor control circuit through the microprocessor, so as to control on / off of the IGBT in the output loop of a thyristor. Separated control means protects the safety of the IGBT. The filtering unit filters electromagnetic impurities to further ensure safe use of the IGBT.

Description

technical field [0001] The invention relates to the technical field of integrated drive circuits, in particular to an integrated IGBT dedicated drive circuit. Background technique [0002] At present, the driving scheme applied to IGBT is mainly to design the driving circuit of the separation device or the thick film driving module using the photoelectric isolation technology, and to use the plug-and-play magnetic isolation integrated driver developed by some manufacturers to deal with the anti-disturbance of the transformer manhole cover. The drive circuit designed with discrete devices is generally installed directly on a single circuit board above the electromagnetic interference and its strong IGBT half-bridge module, because the core drive control circuit in the drive device that is susceptible to interference is difficult to withstand large currents (such as short circuit) High-intensity electromagnetic interference under working conditions often causes problems such a...

AI Technical Summary

Problems solved by technology

The drive circuit designed with discrete devices is generally installed directly on a single circuit board above the electromagnetic interference and its strong IGBT half-bridge module, because the core drive control circuit in the drive device that is susceptible to interference is difficult to withstand large currents (such as short circuit) High-intensity electromagnetic interference under working conditions often causes problems such as false alarms and malfunctions of the drive device, which affects the reliability and stability of the entire system

However, the use of plug-and-play drivers not only has the problem of high cost, but also limits the flexibility and interface of the driver circuit design.

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