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

Abstract

The invention discloses a start and stop control system and method for a high-power bidirectional full-bridge DC-DC converter. The start and stop control system comprises a bidirectional full-bridge DC-DC converter, a signal conditioning and limit-exceeding monitoring module, a PWM generating and driving module, a protection module, a CPLD, a single chip microcomputer and a control console, wherein the input end of the signal conditioning and limit-exceeding monitoring module is connected with the bidirectional full-bridge DC-DC converter while the output end of the signal conditioning and limit-exceeding monitoring module is connected with the CPLD and the single chip microcomputer separately; the output end of the CPLD is connected with the input ends of the PWM generating and driving module and the protection module separately; the output ends of the PWM generating and driving module and the protection module are connected with the bidirectional full-bridge DC-DC converter separately; the single chip microcomputer is connected with the CPLD through a communication bus; and the single chip microcomputer is also connected with the control console through an SPI communication bus. By adoption of the bidirectional full-bridge DC-DC converter, the stable-state reliable operation of the system is ensured based on the digital and analog combination of the CPLD and the single chip microcomputer.

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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