Effect of energy recovery on efficiency in electro-hydrostatic closed system for differential actuator
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Effect of energy recovery on efficiency in electro-hydrostatic closed system for differential actuator. / Agostini, Thales; Negri, Victor De; Minav, Tatiana; Pietola, Matti.
In: Actuators, Vol. 9, No. 1, 12, 01.03.2020.Research output: Contribution to journal › Article › Scientific › peer-review
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TY - JOUR
T1 - Effect of energy recovery on efficiency in electro-hydrostatic closed system for differential actuator
AU - Agostini, Thales
AU - Negri, Victor De
AU - Minav, Tatiana
AU - Pietola, Matti
PY - 2020/3/1
Y1 - 2020/3/1
N2 - This paper investigates energy efficiency and dynamic behavior through simulation and experiments of a compact electro-hydrostatic actuator system (EHA) consisting of an electric motor, external gear pump/motors, hydraulic accumulator, and differential cylinder. Tests were performed in a stand-alone crane in order to validate the mathematical model. The influence and importance of a good balance between pump/motors displacement and cylinder areas ratios is discussed. The overall efficiency for the performed motion is also compared considering the capability or not of energy recovery. The results obtained demonstrate the significant gain of efficiency when working in the optimal condition and it is compared to the conventional hydraulic system using proportional valves. The proposed system presents the advantages and disadvantages when utilizing components off-the-shelf taking into account the applicability in mobile and industrial stationary machines.
AB - This paper investigates energy efficiency and dynamic behavior through simulation and experiments of a compact electro-hydrostatic actuator system (EHA) consisting of an electric motor, external gear pump/motors, hydraulic accumulator, and differential cylinder. Tests were performed in a stand-alone crane in order to validate the mathematical model. The influence and importance of a good balance between pump/motors displacement and cylinder areas ratios is discussed. The overall efficiency for the performed motion is also compared considering the capability or not of energy recovery. The results obtained demonstrate the significant gain of efficiency when working in the optimal condition and it is compared to the conventional hydraulic system using proportional valves. The proposed system presents the advantages and disadvantages when utilizing components off-the-shelf taking into account the applicability in mobile and industrial stationary machines.
KW - Differential cylinder
KW - Efficiency
KW - Electro-hydrostatic actuator (EHA)
KW - Simulation
U2 - 10.3390/act9010012
DO - 10.3390/act9010012
M3 - Article
VL - 9
JO - Actuators
JF - Actuators
SN - 2076-0825
IS - 1
M1 - 12
ER -