Abstract
Due to recent advances in technologies ranging from hydraulically-assisted prostheses to human-scale robotics, there is a growing need for compact and efficient delivery of hydraulic power. Existing electric driven pumps require conversion from electric to rotational power before generating hydraulic output power. This work presents a dynamic model and experimental results of a linear pump that uses an electromagnetic force applied directly to the piston, resulting in a more direct conversion of electrical to hydraulic power in a compact package at the human power level. The model uses a quasi-steady state magnetic equivalent circuit model for the linear electromagnetic actuator coupled to a numerical time-domain piston pump model. The coupled model calculates the piston trajectory, cylinder pressures, and flowrates as a function of time. The modeled force generation and resulting mechanical dynamics match results generated from finite element analysis within 7%, with a predicted power density of 0.19 W/cc and efficiency of 73% for an unoptomized geometry. A multi-objective genetic algorithm is used to determine the geometry and operating parameters that give maximum power density and maximum efficiency, demonstrating that power densities of 0.7 W/cc and efficiencies of 85% are achievable.
| Original language | English (US) |
|---|---|
| Title of host publication | ASME/BATH 2017 Symposium on Fluid Power and Motion Control, FPMC 2017 |
| Publisher | American Society of Mechanical Engineers |
| ISBN (Electronic) | 9780791858332 |
| DOIs | |
| State | Published - Jan 1 2017 |
| Event | ASME/BATH 2017 Symposium on Fluid Power and Motion Control, FPMC 2017 - Sarasota, United States Duration: Oct 16 2017 → Oct 19 2017 |
Publication series
| Name | ASME/BATH 2017 Symposium on Fluid Power and Motion Control, FPMC 2017 |
|---|
Other
| Other | ASME/BATH 2017 Symposium on Fluid Power and Motion Control, FPMC 2017 |
|---|---|
| Country | United States |
| City | Sarasota |
| Period | 10/16/17 → 10/19/17 |
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Cite this
Dynamic modeling of a linear electromagnetic piston pump. / Hogan, Paul H.; Van De Ven, James D.
ASME/BATH 2017 Symposium on Fluid Power and Motion Control, FPMC 2017. American Society of Mechanical Engineers, 2017. (ASME/BATH 2017 Symposium on Fluid Power and Motion Control, FPMC 2017).Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Dynamic modeling of a linear electromagnetic piston pump
AU - Hogan, Paul H.
AU - Van De Ven, James D
PY - 2017/1/1
Y1 - 2017/1/1
N2 - Due to recent advances in technologies ranging from hydraulically-assisted prostheses to human-scale robotics, there is a growing need for compact and efficient delivery of hydraulic power. Existing electric driven pumps require conversion from electric to rotational power before generating hydraulic output power. This work presents a dynamic model and experimental results of a linear pump that uses an electromagnetic force applied directly to the piston, resulting in a more direct conversion of electrical to hydraulic power in a compact package at the human power level. The model uses a quasi-steady state magnetic equivalent circuit model for the linear electromagnetic actuator coupled to a numerical time-domain piston pump model. The coupled model calculates the piston trajectory, cylinder pressures, and flowrates as a function of time. The modeled force generation and resulting mechanical dynamics match results generated from finite element analysis within 7%, with a predicted power density of 0.19 W/cc and efficiency of 73% for an unoptomized geometry. A multi-objective genetic algorithm is used to determine the geometry and operating parameters that give maximum power density and maximum efficiency, demonstrating that power densities of 0.7 W/cc and efficiencies of 85% are achievable.
AB - Due to recent advances in technologies ranging from hydraulically-assisted prostheses to human-scale robotics, there is a growing need for compact and efficient delivery of hydraulic power. Existing electric driven pumps require conversion from electric to rotational power before generating hydraulic output power. This work presents a dynamic model and experimental results of a linear pump that uses an electromagnetic force applied directly to the piston, resulting in a more direct conversion of electrical to hydraulic power in a compact package at the human power level. The model uses a quasi-steady state magnetic equivalent circuit model for the linear electromagnetic actuator coupled to a numerical time-domain piston pump model. The coupled model calculates the piston trajectory, cylinder pressures, and flowrates as a function of time. The modeled force generation and resulting mechanical dynamics match results generated from finite element analysis within 7%, with a predicted power density of 0.19 W/cc and efficiency of 73% for an unoptomized geometry. A multi-objective genetic algorithm is used to determine the geometry and operating parameters that give maximum power density and maximum efficiency, demonstrating that power densities of 0.7 W/cc and efficiencies of 85% are achievable.
UR - http://www.scopus.com/inward/record.url?scp=85040057439&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85040057439&partnerID=8YFLogxK
U2 - 10.1115/FPMC2017-4324
DO - 10.1115/FPMC2017-4324
M3 - Conference contribution
T3 - ASME/BATH 2017 Symposium on Fluid Power and Motion Control, FPMC 2017
BT - ASME/BATH 2017 Symposium on Fluid Power and Motion Control, FPMC 2017
PB - American Society of Mechanical Engineers
ER -