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A dc/dc converter equipped with a fault detection circuit and a fault detection method

A detection circuit and converter technology, applied in the direction of measuring electrical variables, measuring current/voltage, emergency protection circuit devices, etc., can solve the problems that the circuit is not flexible enough to respond to different fault situations, cannot accurately judge the fault type, etc., and achieve rapid response , the effect of reducing energy loss

Active Publication Date: 2021-12-31
DALIAN MARITIME UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can stop the output of the converter when a fault occurs, but it cannot accurately determine the type of fault, and the mode of directly stopping the operation of the DC / DC converter is adopted for different faults, so that the circuit can respond to different fault situations not flexible enough

Method used

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  • A dc/dc converter equipped with a fault detection circuit and a fault detection method
  • A dc/dc converter equipped with a fault detection circuit and a fault detection method
  • A dc/dc converter equipped with a fault detection circuit and a fault detection method

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Embodiment Construction

[0052] The principles and features of the present invention will be described below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.

[0053] Such as figure 1 As shown, a DC / DC converter configured with a fault detection circuit includes a DC / DC converter module 1, a microprocessor module 2, a PWM output module 8, a voltage detection unit 3, a current detection unit 4, and an overvoltage protection Module 5, overcurrent protection module 6, fault signal transmission circuit 7 (including fast and slow optocouplers) and fault protection action circuit 9 (protection switch), wherein,

[0054] The output of the DC / DC converter module 1 is connected to the input of the voltage and current detection units 3 and 4;

[0055]The outputs of the voltage and current detection units 3 and 4 are connected to the inputs of the overvoltage and overcurrent pro...

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Abstract

The invention discloses a DC / DC converter equipped with a fault detection circuit and a fault detection method, including a DC / DC converter module, a microprocessor module, a PWM output module, a voltage detection unit, a current detection unit, an overvoltage protection module, an overcurrent protection module, a fault signal transmission circuit and a fault protection action circuit, wherein the output of the DC / DC converter module is connected to the input of the voltage and current detection unit; the output of the microprocessor module is connected to the The input of the PWM output module is connected; the output of the PWM output module is connected with the input of the DC / DC converter module. The protection of the converter is realized by combining the overvoltage and overcurrent protection with the microprocessor. When the converter has input overvoltage and output overcurrent, the PWM module decides to stop or suspend directly according to the signal type of the protection feedback. Shutdown protects the converter and its load equipment.

Description

technical field [0001] The invention relates to the technical field of circuit protection, in particular to a DC / DC converter equipped with a fault detection circuit and a fault detection method. Background technique [0002] DC / DC converters are more and more widely used, but it is necessary to ensure that the input and output of the DC / DC converter conform to the application scenario when using it, so as to prevent the input and output from being overloaded and damage the DC / DC converter, that is, when encountering the above In the event of a failure, it is necessary to ensure that the DC / DC converter can be reliably stopped and restarted. [0003] Most of the prior art currently generates a protection signal by comparing a protection value with a given value, sends the protection signal to a microprocessor, and the microprocessor sends a shutdown signal to realize a reliable stop of the DC / DC converter. This method can stop the output of the converter when a fault occurs...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H7/12G01R19/165
CPCH02H7/1213G01R19/165
Inventor 刘彦呈张博庄绪州张勤进郭昊昊孙凡金林叶锦
Owner DALIAN MARITIME UNIVERSITY