Automatic multi-functional display circuit for power electronic equipment

Abstract

The invention relates to an automatic multi-functional display circuit for power electronic equipment and belongs to the technical field of power electronic information and automatic products. The automatic multi-functional display circuit comprises N+1 driving circuits, N+1 limited-current circuits, N+1 isolation circuits, a logic circuit, a control circuit and a display circuit. The N driving circuits are connected with state signals respectively, and all the state signals are connected with the input end of the logic circuit. Each driving circuit is connected with the input end of the corresponding isolation circuit through the corresponding limited-current circuit. The (N+1)th driving circuit is connected with the output end of a normal state signal and further connected with the logic circuit through the control circuit. The (N+1)th driving circuit is connected with the (N+1)th isolation circuit I through the (N+1)th limited-current circuit I, and the output ends of the N+1 isolation circuits are connected together and then connected with the input end of the display circuit. The automatic multi-functional display circuit has the normal state and state information display automatic switching function, and has the advantages of being simple, reliable in performance, capable of achieving SMT production and the like.

Description

technical field [0001] The invention belongs to the technical field of power electronic information and automation products, in particular to the design technology of an automatic multifunctional display circuit for power electronic equipment. Background technique [0002] In the field of power electronic information and automation products, under normal circumstances, the equipment is on duty at important positions, and regular inspections become the norm. At this time, it is very important for the equipment to automatically display its working status, especially when there is a fault protection, the inspection Personnel can know the type of equipment failure at a glance, which is of far-reaching significance to race against time to troubleshoot, restore equipment to work in time, and reduce major losses. For example: for high-speed rail signal equipment, if the equipment fails, it will cause the high-speed rail line to flash red, and then cause the entire line to stop. Di...

AI Technical Summary

Problems solved by technology

[0003] The traditional method of indicating the working status of the equipment is to use light-emitting diodes, the green light indicates "normal operation", and the red light indicates "fault alarm". In this way, the inspection personnel cannot judge the fault type of the equipment for a long time, and cannot eliminate the fault in time, which leads to Significant economic loss and even political impact

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