August 20 & 21, 2025
Hall F, Donald E. Stephens Convention Center, Chicago, USA

Off-Highway Conference

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Special Preview - Demonstration of a closed-circuit, electrohydraulic architecture for electrified off-road vehicles, designed for high cycle efficiency and low noise emissions

20 Aug 2025
Day 1_Off-Highway
This presentation features an experimental activity carried out at Purdue’s Maha Fluid Power Research Center on an actuation system designed to achieve high efficiency and low noise emissions in battery-electric off-road vehicles. The actuation system is tested on the implements of a skid-steer loader, using a novel four-quadrant electric-hydraulic unit. The electric unit is a brushless synchronous reluctance machine, and the hydraulic unit is a four-quadrant continuous-contact gear machine. Such a supply unit is used in a closed-circuit hydraulic architecture that combines primary control and bleed-off control to meet control requirements and optimize the sizing of the supply unit.

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