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Regenerative Motor Compensator for Load Sensing Hydraulics
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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en
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10
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IEEE Access, Volume 14, pp. 41421-41430
Abstract
Diminishing environmental impact of non-road mobile machinery has been set as a goal for construction, agricultural and mining industries. Academia and industry have proposed multiple novel solutions for primary energy sources, hydraulic systems and powertrain layouts aiming for minimized environmental impact. However, even the state-of-the-art modern non-road mobile machinery still relies on traditional ICE-based powerlines and valve-controlled hydraulic circuits, resulting in poor total energy efficiencies. The commercial state-of-the-art in mobile hydraulic powertrains is load sensing systems, providing moderate energy-efficiency compared to earlier levels to their predecessors. Significant sources of inefficiency of these systems are pressure compensator valves, causing energy loss especially in situations where multiple actuators are actuated simultaneously. In the present study an energy regenerative alternative to pressure compensators of load sensing hydraulic system is presented and analyzed. The system is named regenerative motor compensator (RMC) and is intended to be used in hybrid and electric machinery utilizing load sensing hydraulic systems. The solution converts portion of the hydraulic energy lost in pressure compensators to electrical energy to be restored to the battery of the machine or to be used elsewhere. The operating principle and energy-saving potential of the system was analyzed with simulation model of a wheel loader equipped with RMC. Simulation results confirmed that the system was capable of energy regeneration, regenerating 5.6% of the total hydraulic energy input, but required relatively large sizing of system components, possibly limiting practical feasibility of RMC. Compared to other proposals aiming at minimal impact on existing load-sensing architectures, no clear advantage in terms of energy recovery potential was observed.
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Publisher Copyright: © 2013 IEEE.
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Lehto, J & Vepsalainen, J 2026, 'Regenerative Motor Compensator for Load Sensing Hydraulics', IEEE Access, vol. 14, pp. 41421-41430. https://doi.org/10.1109/ACCESS.2026.3672752