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Electro-Hydraulic Variable-Speed Drive Networks—Idea, Perspectives, and Energy Saving Potentials

Author

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  • Lasse Schmidt

    (AAU Energy, Aalborg University, Pontoppidanstraede 111, 9220 Aalborg, Denmark)

  • Kenneth Vorbøl Hansen

    (Bosch Rexroth A/S, Telegrafvej 1, 2750 Ballerup, Denmark)

Abstract

Electro-hydraulic differential cylinder drives with variable-speed displacement units as their central transmission element are subject to an increasing focus in both industry and academia. A main reason is the potential for substantial efficiency increases due to avoidance of throttling of the main flows. Research contributions have mainly been focusing on appropriate compensation of volume asymmetry and the development of standalone self-contained and compact solutions, with all necessary functions onboard. However, as many hydraulic actuator systems encompass multiple cylinders, such approaches may not be the most feasible ones with respect to efficiency or commercial feasibility. This article presents the idea of multi-cylinder drives, characterized by electrically and hydraulically interconnected variable-speed displacement units essentially allowing for completely avoiding throttle elements, while allowing for hydraulic and electric power sharing as well as the sharing of auxiliary functions and fluid reservoir. With drive topologies taking offset in communication theory, the concept of electro-hydraulic variable-speed drive networks is introduced. Three different drive networks are designed for an example application, including component sizing and controls in order to demonstrate their potentials. It is found that such drive networks may provide simple physical designs with few building blocks and increased energy efficiencies compared to standalone drives, while exhibiting excellent dynamic properties and control performance.

Suggested Citation

  • Lasse Schmidt & Kenneth Vorbøl Hansen, 2022. "Electro-Hydraulic Variable-Speed Drive Networks—Idea, Perspectives, and Energy Saving Potentials," Energies, MDPI, vol. 15(3), pages 1-33, February.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:3:p:1228-:d:744370
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    References listed on IDEAS

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    1. Damiano Padovani & Søren Ketelsen & Daniel Hagen & Lasse Schmidt, 2019. "A Self-Contained Electro-Hydraulic Cylinder with Passive Load-Holding Capability," Energies, MDPI, vol. 12(2), pages 1-21, January.
    2. Anders H. Hansen & Magnus F. Asmussen & Michael M. Bech, 2019. "Hardware-in-the-Loop Validation of Model Predictive Control of a Discrete Fluid Power Power Take-Off System for Wave Energy Converters," Energies, MDPI, vol. 12(19), pages 1-22, September.
    3. Konrad Johan Jensen & Morten Kjeld Ebbesen & Michael Rygaard Hansen, 2021. "Novel Concept for Electro-Hydrostatic Actuators for Motion Control of Hydraulic Manipulators," Energies, MDPI, vol. 14(20), pages 1-27, October.
    4. Søren Ketelsen & Sebastian Michel & Torben O. Andersen & Morten Kjeld Ebbesen & Jürgen Weber & Lasse Schmidt, 2021. "Thermo-Hydraulic Modelling and Experimental Validation of an Electro-Hydraulic Compact Drive," Energies, MDPI, vol. 14(9), pages 1-29, April.
    5. Anders Hedegaard Hansen & Magnus F. Asmussen & Michael M. Bech, 2018. "Model Predictive Control of a Wave Energy Converter with Discrete Fluid Power Power Take-Off System," Energies, MDPI, vol. 11(3), pages 1-17, March.
    6. Qu, Shaoyang & Fassbender, David & Vacca, Andrea & Busquets, Enrique, 2021. "A high-efficient solution for electro-hydraulic actuators with energy regeneration capability," Energy, Elsevier, vol. 216(C).
    7. Lasse Schmidt & Søren Ketelsen & Morten Helms Brask & Kasper Aastrup Mortensen, 2019. "A Class of Energy Efficient Self-Contained Electro-Hydraulic Drives with Self-Locking Capability," Energies, MDPI, vol. 12(10), pages 1-26, May.
    8. Lukasz Stawinski & Justyna Skowronska & Andrzej Kosucki, 2021. "Energy Efficiency and Limitations of the Methods of Controlling the Hydraulic Cylinder Piston Rod under Various Load Conditions," Energies, MDPI, vol. 14(23), pages 1-20, November.
    9. Søren Ketelsen & Damiano Padovani & Torben O. Andersen & Morten Kjeld Ebbesen & Lasse Schmidt, 2019. "Classification and Review of Pump-Controlled Differential Cylinder Drives," Energies, MDPI, vol. 12(7), pages 1-27, April.
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    Cited by:

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