Design and Experiments on a Hybrid Electric Drive System for Underground Coal Mine Locomotives

The underground locomotive transportation is a vitally important part of coal mine transportation system. Aiming at the shortcomings of current drive system of locomotives, a novel hybrid electric drive system for underground coal mine locomotive was designed based on the hybrid technology, which can provide not only sufficient power but also continuous transportation without serious pollution. Then, the dynamic performance, output speed on drive cycle, fuel economy performance, battery charging and discharging performance and emission performance were verified by experiments on a test bench for hybrid mining vehicles. The results showed that the driving performances can satisfy the requirements of underground coal mine locomotive, which indicated that the hybrid drive system was designed reasonably.