Sudarshan Martins

Design and optimization of a drivetrain with two-speed transmission for electric delivery step van

The use of a two-speed transmission in electric delivery step vans to improve performance and efficiency is discussed in this paper. Two important tasks relating to this application are considered. The first task includes the development and optimization of a two-speed transmission, where the gear ratios are used as design variables, while vehicle performance and energy consumption are design objectives. The procedure is based on simulation and optimization. The simulation model and the optimization process are described. The second task includes the estimation of the efficiency and comparison of the performance of an electric step van with a direct drive setup versus the vehicle with the two-speed transmission.

INVESTIGATING THE DIFFERENCES IN CHARGE DYNAMICS DUE TO A VARIATION OF THE INSTRUMENTED BALL PROPERTIES

Abstract The validation of charge mill motion simulations is limited by the lack of information from inside a tumbling mill. To this end, an electronic system capable of measuring a number of physical quantities within a highly dynamic environment has been designed, built and tested. Once protected, the system can be used to record physical quantities within a ball mill. Different types of protective shells may be used to protect the electronics. When comparing the measurements recorded using two different shells, some differences in the behaviour of the instrumented ball were observed.