Simulation based feasibility confirmation of using hybrid powertrain system in unmanned dump trucks

Abstract

Abstract The use of medium-duty vehicles (up to 50 tons) with a simultaneous reduction in technological and operational downtime, which is achieved by automated traffic control and loading and unloading systems, as well as optimization of technological maintenance modes, can be considered a new trend in the development of mining transport. The solution that meets the requirements and current development trends is the use of medium-duty unmanned dump trucks (UDT) in the interests of the Russian coal industry. An assessment of the most important performance characteristics of UDT, such as energy efficiency indicators, is considered in this research. The purpose of the research is to confirm the feasibility of using hybrid power system (HPS) in the construction of UDT. A series HPS is considered, characterized by the use of two traction electric motors: one drives the wheels of the front axle, the second drives the wheels of the rear bogie axle. The feasibility confirmation is carried out by comparing the energy efficiency and mobility of the studied vehicle with similar, equipped with other types of powertrains by simulation methods. The presented simulation results show the efficiency of HPS application in comparison with a traditional powertrain and a mechanical transmission for UDT when driving in drive cycles similar to a given one. The use of HPS allows reducing energy consumption for motion by 20-25% due to the recovery of braking energy.