A Cost-Effective Electro-Hydraulic Actuator Solution with Open Circuit Architecture
Keywords:Electro-hydraulic actuator, open circuit, 4-quadrant functionality
With the recent electrification trend in the fluid power area, more research has been incentivized to propose cost-effective and energy-efficient solutions for hydraulic systems. Hence, electro-hydraulic actuator (EHA) architectures receive increasing attention. The paper proposes a novel open-circuit EHA architecture, with the goal to obtain a cost-effective solution for mobile applications while maximizing the overall system efficiency. The proposed EHA is capable of meeting or exceeding traditional off-road machine performance, therefore enabling further electrification of off-road machines. Four-quadrant functionality, covering the full speed range, is achieved by a combination of a variable electro-hydraulic drive and valves with different functions. Focusing on the steady-state performance, the functionality is validated by numerical as well as experimental methods. A simulation model based on the Amesim environment and a dedicated test setup was developed to verify the performance. The good match between simulation and experimental results confirms the potential of the formulation approach of the proposed EHA for applications with different duty cycles and power levels.
A. Vacca, “Energy efficiency and controllability of fluid power systems,” Energies, vol. 11, no. 5, 2018.
L. Love, E. Lanke, and P. Alles, Estimating the Impact (Energy, Emissions and Economics) of the US Fluid Power Industry, no. December. 2012.
D. B. Beck, D. E. Fischer, D. G. Kolks, D. J. Lübbert, D. S. Michel, and D. M. Schneider, “Novel System Architectures by Individual Drives,” 10th Int. Fluid Power Conf., pp. 29–62, 2016.
Z. Quan, L. Quan, and J. Zhang, “Review of energy efficient direct pump controlled cylinder electro-hydraulic technology,” Renew. Sustain. Energy Rev., vol. 35, pp. 336–346, 2014.
H. Liu, Y. Jiang, and S. Li, “Design and downhill speed control of an electric-hydrostatic hydraulic hybrid powertrain in battery-powered rail vehicles,” Energy, vol. 187, p. 115957, 2019.
R. Navarro, “Performance of an electro-hydrostatic actuator on the F-18 systems research aircraft,” NASA Tech. Memo., no. 206224, 1997.
S. Frischemeier, “Electrohydrostatic actuators for aircraft primary flight control-types, modelling and evaluation,” Proc. Fifth Scand. …, pp. 1–16, 1997.
J. P. Henderson, A. Plummer, and N. Johnston, “An electro-hydrostatic actuator for hybrid active-passive vibration isolation,” Int. J. Hydromechatronics, vol. 1, no. 1, p. 47, 2018.
G. Altare and A. Vacca, “A Design Solution for Efficient and Compact Electro- hydraulic Actuators,” Procedia Eng., vol. 106, pp. 8–16, 2015.
S. Alfayad, F. B. Ouezdou, F. Namoun, and G. Gheng, “High performance integrated electro-hydraulic actuator for robotics – Part I: Principle, prototype design and first experiments,” Sensors Actuators, A Phys., vol. 169, no. 1, pp. 115–123, 2011.
T. Yu, A. Plummer, P. Iravani, J. Bhatti, S. Zahedi Obe, and D. Moser, “Testing an Electrohydrostatic Powered Ankle Prosthesis with Transtibial and Transfemoral Amputees,” IFAC-PapersOnLine, vol. 49, no. 21, pp. 185–191, 2016.
T. Lin, Q. Chen, H. Ren, W. Huang, Q. Chen, and S. Fu, “Review of boom potential energy regeneration technology for hydraulic construction machinery,” Renew. Sustain. Energy Rev., vol. 79, no. July 2016, pp. 358–371, 2017.
S. Hui, Y. Lifu, and J. Junqing, “Hydraulic/electric synergy system (HESS) design for heavy hybrid vehicles,” Energy, vol. 35, no. 12, pp. 5328–5335, 2010.
W. Zhao, X. Zhou, C. Wang, and Z. Luan, “Energy analysis and optimization design of vehicle electro-hydraulic compound steering system,” Appl. Energy, vol. 255, no. July, p. 113713, 2019.
Parker, “Compact EHA Electro-Hydraulic Actuators for high power density applications.” Catalog HY22-3101E 9/20.
T. B. Sweeney and M. C. Royer, “(12) Patent Application Publication (10) Pub. No.: US 2012/0067035 A1,” 2012.
T. Pietrzyk, D. Roth, K. Schmitz, and G. Jacobs, “Design study of a high speed power unit for electro hydraulic actuators (EHA),” 11. Int. Fluid Konf., no. Dc, 2018.
D. Padovani, S. Ketelsen, D. Hagen, and L. Schmidt, “A self-contained electro- hydraulic cylinder with passive load-holding capability,” Energies, vol. 12, no. 2, pp. 1–19, 2019.
L. Schmidt, S. Ketelsen, M. H. Brask, and K. A. Mortensen, “A class of energy efficient self-contained electro-hydraulic drives with self-locking capability,” Energies, vol. 12, no. 10, pp. 1–27, 2019.
L. Ge, L. Quan, Y. Li, X. Zhang, and J. Yang, “A novel hydraulic excavator boom driving system with high efficiency and potential energy regeneration capability,” Energy Convers. Manag., vol. 166, no. April, pp. 308–317, 2018.
T. Lin and Q. Wang, “Hydraulic accumulator-motor-generator energy regeneration system for a hybrid hydraulic excavator,” Chinese J. Mech. Eng. (English Ed.), vol. 25, no. 6, pp. 1121–1129, 2012.
S. Ketelsen, D. Padovani, T. O. Andersen, M. K. Ebbesen, and L. Schmidt, “Classification and review of pump-controlled differential cylinder drives,” Energies, vol. 12, no. 7, pp. 1–26, 2019.
H. Liu, X. Zhang, L. Quan, and H. Zhang, “Research on energy consumption of injection molding machine driven by five different types of electro-hydraulic power units,” J. Clean. Prod., vol. 242, p. 118355, 2020.
S. Qu, D. Fassbender, A. Vacca, B. Enrique, and U. Neumann, “A Closed Circuit Electro-Hydraulic Actuator With Energy Recuperation Capability,” 12th Int. Fluid Power Conf., pp. 89–98, 2020.
K. Heybroek, J.-O. Palmberg, J. Lillemets, M. Lugnberg, and M. Ousbäck, “Evaluating a Pump Controlled Open Circuit Solution,” Proc. Int. Expo. Power Transm. IFPE’08, no. 24, pp. 681–694, 2008.