CAJ | 학술논문

针对简易升降机电气控制系统故障高发，部分产品在电路可靠性、安全性设计方面薄弱的问题，在日常检验工作及相关事故案例调查分析的基础上，通过分析电路原理图，指出部分产品电气控制系统设计中，门锁回路存在因门锁继电器粘连导致人员坠入井道或被剪切的隐患，控制回路存在因单片机故障等导致安全回路失灵的隐患。针对前者，提出了双门锁继电器设计和增加监测电路两种改进方案。针对后者，提出了安全继电器和门锁继电器触点直接切断主回路接触器供电的改进方案。
침대간역승강궤전기공제계통고장고발，부분산품재전로가고성、안전성설계방면박약적문제，재일상검험공작급상관사고안례조사분석적기출상，통과분석전로원리도，지출부분산품전기공제계통설계중，문쇄회로존재인문쇄계전기점련도치인원추입정도혹피전절적은환，공제회로존재인단편궤고장등도치안전회로실령적은환。침대전자，제출료쌍문쇄계전기설계화증가감측전로량충개진방안。침대후자，제출료안전계전기화문쇄계전기촉점직접절단주회로접촉기공전적개진방안。
In view of the problems in the simple elevator including frequent failure of the electrical control system , low circuit reliability and weakness in the safety design of some products , based on the daily testing work and related investiga-tion on accident cases , the paper analyzes the schematic circuit diagram , points out that in the electrical control system of certain products , there are hazards of worker falling into the shaft or being cut due to adhesion of the lock relay in the door lock circuit and hazards of the loop failure arising from the single chip at fault .For the former hazard , the paper puts for-ward two schemes:design of the double-door lock relay and adding the monitoring circuit;for the latter one , the paper sug-gests an improved scheme where the contacts of the safety relay and door lock relay are used to directly cut off power supply of the major loop contactor .