Within the last years, speed-variable pump drives were investigated in numerous applications. In combination with a variable displacement pump, the volume flow and the drive speed can be decoupled. In this paper the resulting degree of freedom will be used to minimize the energy consumption of hydraulic processes by means of a novel model predictive control concept. A dynamic loss model of all drive components will be transformed to a mathematical quadratic optimization problem. The optimum use of the two control variables can achieve energy savings of up to 25% in comparison to known control strategies of speed-variable variable-displacement pumps. Especially in highly dynamic process cycles the proposed optimization guarantees optimum energy efficiency while known approaches become inefficient.
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8th FPNI Ph.D Symposium on Fluid Power
June 11–13, 2014
Lappeenranta, Finland
Conference Sponsors:
- Fluid Power Net International (FPNI)
- Lappeenranta University of Technology, Finland
ISBN:
978-0-7918-4582-0
PROCEEDINGS PAPER
Quadratic Programming to Optimize Energy Efficiency of Speed- and Displacement-Variable Pumps
Johannes Willkomm,
Johannes Willkomm
Bosch Rexroth AG, Lohr am Main, Germany
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Matthias Wahler,
Matthias Wahler
Bosch Rexroth AG, Lohr am Main, Germany
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Jürgen Weber
Jürgen Weber
TU Dresden, Dresden, Germany
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Johannes Willkomm
Bosch Rexroth AG, Lohr am Main, Germany
Matthias Wahler
Bosch Rexroth AG, Lohr am Main, Germany
Jürgen Weber
TU Dresden, Dresden, Germany
Paper No:
FPNI2014-7802, V001T05A002; 10 pages
Published Online:
October 11, 2014
Citation
Willkomm, J, Wahler, M, & Weber, J. "Quadratic Programming to Optimize Energy Efficiency of Speed- and Displacement-Variable Pumps." Proceedings of the 8th FPNI Ph.D Symposium on Fluid Power. 8th FPNI Ph.D Symposium on Fluid Power. Lappeenranta, Finland. June 11–13, 2014. V001T05A002. ASME. https://doi.org/10.1115/FPNI2014-7802
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