Start-stop control system and method for high-power bidirectional full-bridge dc-dc converter

Abstract

The invention discloses a start-stop control system and method of a high-power bidirectional full-bridge DC-DC converter, the system includes a bidirectional full-bridge DC-DC converter, a signal conditioning and over-limit monitoring module, and a PWM generation and driving module , protection module, CPLD, single-chip microcomputer and console, the input end of described signal conditioning and over-limit monitoring module is connected with bidirectional full-bridge DC-DC converter, and output end is connected with CPLD and single-chip microcomputer respectively; The output end of described CPLD is respectively It is connected with the input end of the PWM generation and the drive module and the protection module; the output end of the PWM generation and the drive module and the protection module is connected with the bidirectional full-bridge DC-DC converter; the single-chip microcomputer is connected with the CPLD through a communication bus, The microcontroller is also connected to the console through the SPI communication bus. The invention adopts a bidirectional full-bridge DC-DC converter, and utilizes the digital-analog combination of a CPLD and a single-chip microcomputer to ensure stable and reliable operation of the system.

Description

technical field [0001] The invention relates to a start-stop control system and method of a DC-DC converter, in particular to a start-stop control system and method of a high-power bidirectional full-bridge DC-DC converter, belonging to the field of switching converters. Background technique [0002] As the country puts forward further requirements on energy consumption, bidirectional full-bridge DC-DC converters that can realize energy storage and release in multi-quadrant working systems have been widely favored and recognized. However, the DC-DC converter is a high-frequency switching converter, and the work of the system is susceptible to electromagnetic interference. When the system is disturbed and fails, it cannot guarantee that the system can be stopped reliably or restarted reliably. Moreover, in high-power places, the start and stop of the system will also cause sudden changes in voltage and current, which may cause repeated work of the system and overload the syst...

AI Technical Summary

Problems solved by technology

However, the DC-DC converter is a high-frequency switching converter, and the work of the system is susceptible to electromagnetic interference. When the system is disturbed and fails, it cannot guarantee that the system can be reliably stopped or reliably restored.

Moreover, in high-power places, the start and stop of the system will also cause sudden changes in voltage and current, which may cause repeated work of the system and overload the system.

Further, the bidirectional working nature of the bidirectional full-bridge DC-DC converter also makes the start-up control of the bidirectional full-bridge DC-DC converter more complicated

[0003] After reviewing the relevant literature, most of the start-stop circuits for high-power bidirectional full-bridge DC-DC converters still stay in the soft-start mode, and the soft-start is aimed at the soft-start of the main topology, and does not address the problems that occur during system startup. A reliable starting method for dealing with various problems of

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