Abstract: In order to solve problems such as overload start, difficult to control speed and low operation efficiency, a new intelligent high voltage frequency converter was proposed, which used intelligent frequency converter to control motor running, instead of the double speed motor drive in traditional way, the scraper conveyor realized the real-time control of motor speed and energy conservation operation. Through the analysis of application effect of 2801 working face in Chensilou Coal Mine, this new type intelligent frequency converter could reduce the impact on the mechanical structure and power grid caused by the starting load effect of scraper conveyer, it solved the speed control problem under different load conditions, and reduced the probability of motor damage and chain breaking accidents as the overload starting and running. It had characteristics of high efficiency, energy conservation, and high stability.