基于电动单梁起重机故障分析的控制电路优化设计

Optimal Design of Control Circuit Based on Fault Analysis of Electric Single-beam Crane

针对电动单梁起重机在无操作状态下缺少运行按钮开关接通和接触器主触点粘连的监测保护功能的缺陷,通过在控制电路中增加由时间继电器组成的监测回路,借助各功能的运行按钮的常闭触点与此功能对应接触器的常开触点在运行过程中两者存在的逻辑关系,实现无操作状态下运行按钮开关接通和接触器主触点粘连隐患的监测保护功能。

Aiming at the defects of the monitoring and protection function of the lack of operation button switch on and contactor main contact adhesion in the non-operation state of the electric single-beam crane,by adding a monitoring loop composed of time relay in the control circuit,with the help of the logical relationship between the normally closed contact of the running button of each function and the normally open contact of the contactor corresponding to this function in the running process,the monitoring and protection function of the hidden danger such as running button switch in no operation state and contactor main contact adhesion are realized.