Comparison Study of Fully Individualized System Architectures for Electrified Mini-excavators: Displacement Control (dc) Vs Electro-hydraulic Actuation (eha)
Year: 2024
Type: conference-paper
Abstract: Energy consumption and overall installed power are key parameters for evaluating different technology for the hydraulic actuation system of electrified off-road vehicles.This paper presents a study on these parameters considering the case of all the functions of a 5-ton mini-excavator.The hydraulic system architectures considered for this study are the current commercial solution (load sensing system) and two alternative high-efficiency primary controlled architectures that minimize energy loss: the Displacement Control (DC) system that uses a single electric prime mover and a variable displacement pump for each actuator, and an Electro-Hydraulic Actuator (EHA) system that uses an electric prime mover and a fixed displacement pump for each actuator.For this study, a basic sizing for the two alternative systems is performed based on available commercial components.Both the proposed systems and the conventional LS system are simulated in Simcenter Amesim to determine the energy distribution over a digging duty cycle.The baseline system is also validated based on experimental measurements.The results show a 50% reduction in energy consumption for both the individualized systems, but the overall displacement of the pump units increases by a factor of 3.75.Furthermore, the installed power for the EHA system is 8 times higher than the baseline.Although the study does not suggest a specific architecture for the reference application, the results can assist decision making processes for selecting sub-function primary controlled actuation in future electrified mini-excavators.
Institutions: Purdue University West Lafayette, Burman University
Language: English
Subfield: Mechanical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
OpenAlex ID: W4396851894