Converter three-grade signal protection circuit

Abstract

The invention provides a converter three-grade signal protection circuit. The protection circuit comprises a sensor, a hardware excess protection circuit, an FPGA protection circuit, a DSP pulse blocking circuit, a PWM driving circuit and an IPM power module. The FPGA protection circuit is used for generating a fault pulse blocking signal according to an over-current fault signal, an overvoltage fault signal, an upper bridge arm fault signal and a lower bridge arm fault signal and blocking converter pulse signals of an FPGA, a DSP and the PWM driving circuit. The DSP pulse blocking circuit is used for setting six paths of PWM trigger pulse signals output to the FPGA to a high-resistance state after receiving the fault pulse blocking signal. The technical problem in the prior art that over-current oscillation may easily occur to a converter system to cause damage to an IPM is solved, and the over-current oscillation phenomenon of internal protection of the converter is restrained effectively.

Description

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AI Technical Summary

Benefits of technology

This patented technology provides an improved way to protect converters from excessive current or voltage levels caused by any type of electrical failure during operation. By utilizing this technique, the device can detect when there are too much power being supplied without damaging its components. It also uses different techniques like fuzzy logic to determine if these signals exceed certain thresholds before causing harm. Overall, this method helps prevent failures such as overheating or other issues associated with converters' use.

Problems solved by technology

This patented technical problem addressed by the patents relating to converters involves how fast they can switch on when there could be an issue with certain parts within them that would get damaged if it were turned back down too much without being able to react accordingly.

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