The frequency convert gearing of mining main fans and enegy save;

The application of jiont running of main fans in Zhengchengdi mine;

Practical tech. to economically operate main fan;

This article mainly summarized the experience and lessons seriously of once installing the new main fan,including the selection of new fan motor that must have enough power when we installed the new main fan and some other questions that should be paid attention to while hanging the network etc.

In view of the problems occurred in the daily electric maintenance of main fans introduced from France and by analyzing the reasons,the improved and preventive measures are carried out,thus effectively guaranteeing safety running of main fans.

This paper introduces the functions of the excitation device in the normal operation of the main fan,and connecting with the actual situation,makes the technical analysis on the faults often occurring in the excitation devices.

To analyze the effect on the others after adjusting the performance of a certain fan when multiple-set main fan unitedly work at the same time,point out the performance changing rules.