Intelligent digital dual-power-supply switching device and fault self-checking method thereof

Abstract

The invention discloses an intelligent digital dual-power-supply switching device and a fault self-checking method thereof. The intelligent digital dual-power-supply switching device comprises a power supply module, a voltage sampling module, a microcontroller module, a motor control module and an upper computer. The power supply module comprises two input rectification filtering modules, two flyback DC / DC modules, two output rectification filtering modules, two reverse protection diodes and a supercapacitor. The supercapacitor can be charged if one path of the two flyback DC / DC modules normally works; and when working of the two flyback DC / DC modules is abnormal, the supercapacitor supplies power to the microcontroller module for a short period of time to realize uploading of fault information, and the fault part is judged according to the uploaded information. The fault self-checking capacity of the dual-power-supply switching device can be enhanced so that the difficulty of fault source tracing of the device can be reduced.

Description

technical field [0001] The invention relates to the technical field of power equipment, in particular to an intelligent digital dual power supply switching device. Background technique [0002] In important places requiring high power supply reliability such as hospitals, airports, and firefighting, dual power supply switching devices are usually equipped to improve power supply reliability. [0003] In order to improve the accuracy of undervoltage detection and realize real-time monitoring of its operating status, dual power switching devices are gradually changing from traditional analog devices to digital devices. Invention patents (201110152296.5), invention patents (201110276944.8) and utility models (200820121554.7) and other digital devices have overcome the shortcomings of traditional analog devices such as complex control circuit design, difficult maintenance, and poor reliability, while improving the flexibility of conversion devices , with remote real-time monito...

AI Technical Summary

Problems solved by technology

Invention patents (201110152296.5), invention patents (201110276944.8) and utility models (200820121554.7) and other digital devices have overcome the shortcomings of traditional analog devices such as complex control circuit design, difficult maintenance, and poor reliability, while improving the flexibility of conversion devices , with functions such as remote real-time monitoring

However, the intelligent digital dual-power switching device uses digital circuits to realize the power switching function, and the number of device modules is large. Once a module works abnormally, the entire device may stop working.

The above-mentioned disclosed intelligent digital dual-power switching device lacks a fault self-check function, so when the device stops working, it is impossible to determine the cause of the fault, and it is difficult to trace the source of the fault, which is not conducive to timely repair and rapid recovery of the device.

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