Abstract: With the development of China's economy, the output increase, energy consumption decrease and performance improvement of coal mines have been put on the important place and the equipment transformation for energy conservation has also become imperative. In view of the features of inclined shaft hoisting, AC-DC-AC 4-quadrant variable-frequency speed-regulation system with energy feedback unit for the hoisting in inclined shaft is developed. The paper describes the composition and control principle of the hoisting system and analyzes the operational performance and research and spreading significance of the speed regulation system in light of its site application.

Key words: Variable frequency speed regulation, Braking unit, Energy feedback, Hoisting in inclined shaft