Thesis Title Existed Controller Modernization By PESSRAE

Escalator is the common daily electrical equipment, for shopping malls, airports and many other places. It is an important part of modern architecture, also.As semiconductor and motor manufacturing technology continues to develop, the escalator technology has experienced a number of leaps and bounds.Based on Programmable Electronic Systems in Safety Related Applications for Escalators(PESSRAE) technology focuses on the missing step detact and handrail speed monitor modernization development for the deliveried escalator electrical control system.This paper first describes the escalator and escalator electrical control system developments at home and abroad, elaborated escalator electrical control system, which describes the escalator operation modes, the electrical system controller technology and safety monitor technology;Secondly pointed escalator electrical modernization control system problems and design factors were briefed on the current modernization controller, but also put forward ways to cope.The article also focuses on the escalator electrical control system moduernization by the national code GB16899-2011 request update, respectively, from the electrical control system design requirements, electrical control system moduernization request and electrical safety protection system three aspects of the research.Due to the current growing emphasis on the safety area, at the end of this article, it describes the modernization and software to build up the safety electrical circuit by the safety PLC, designed to study safer and reliable escalator control system provide a theoretical basis for the modularization design upgrade on site...