Work-frequency Automatic Switching Technology of Mine Main Ventilator

According to the no parking characteristic of mine main ventilation, through the research of motor contemporaneous grid and PLC control method, the work-frequency automatic switching technology was put forward, and the design idea and scheme of hardware and software was obtained. The function achieved that the standby ventilator equipment ran automatically and work-frequency switched automatically in the case of no parking, which improved the safety reliability and automation degree of the whole system.