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Title: Automated Design and Analysis of a Variable Displacement Linkage Motor

Abstract

Hydrostatic drives consisting of a variable displacement pump and a low speed high torque (LSHT) motor are frequently used in off-highway vehicles. A variable displacement traction motor is desirable because of the ability to downsize the pump and thereby run the hydrostat at higher efficiency, as well as the possibility of hybridization of the drivetrain. Currently on the market are fixed and discrete speed LSHT radial piston motors and high speed low torque variable displacement axial piston motors. The radial piston motors are displacement dense but are not continuously variable, whereas the axial piston motors are continuously variable but require gearboxes, introducing packaging and robustness concerns. The Variable Displacement Linkage Motor (VDLM) is a LSHT motor that is continuously variable. It offers several benefits over current LSHT motors in that it is highly efficient over its operating range, it has low torque ripple, and it is displacement dense due to its multi-lobed cam and radial packaging. As with the design of any motor, the process is iterative and must be performed whenever performance objectives change. This paper describes an automated method for rapid exploration of the solution space for a variable displacement motor with specific application to the VDLM. Thismore » method leads to a motor design that theoretically can achieve 97% efficiency with a torque ripple below 5% at full displacement.« less

Authors:
 [1];  [1];  [1];  [1];  [1]
  1. University of Minnesota
Publication Date:
Research Org.:
University of Minnesota
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V)
OSTI Identifier:
1569920
Report Number(s):
DOE-UMN-008335-1
Journal ID: FPMC2019-1677
DOE Contract Number:  
EE0008335
Resource Type:
Conference
Journal Name:
Proceedings of the ASME/BATH Symposium on Fluid Power and Motion Control (FPMC2109)
Additional Journal Information:
Journal Volume: 1; Journal Issue: 1; Conference: ASME/BATH Symposium on Fluid Power and Motion Control, Sarasota, FL, October 7-9, 2019
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; automated design, optimization, dynamic modeling

Citation Formats

Fulbright, Nathan J., Boyce-Erickson, Grey C., Chase, Thomas R., Li, Perry Y., and Van de Ven, James D. Automated Design and Analysis of a Variable Displacement Linkage Motor. United States: N. p., 2019. Web.
Fulbright, Nathan J., Boyce-Erickson, Grey C., Chase, Thomas R., Li, Perry Y., & Van de Ven, James D. Automated Design and Analysis of a Variable Displacement Linkage Motor. United States.
Fulbright, Nathan J., Boyce-Erickson, Grey C., Chase, Thomas R., Li, Perry Y., and Van de Ven, James D. Wed . "Automated Design and Analysis of a Variable Displacement Linkage Motor". United States. https://www.osti.gov/servlets/purl/1569920.
@article{osti_1569920,
title = {Automated Design and Analysis of a Variable Displacement Linkage Motor},
author = {Fulbright, Nathan J. and Boyce-Erickson, Grey C. and Chase, Thomas R. and Li, Perry Y. and Van de Ven, James D.},
abstractNote = {Hydrostatic drives consisting of a variable displacement pump and a low speed high torque (LSHT) motor are frequently used in off-highway vehicles. A variable displacement traction motor is desirable because of the ability to downsize the pump and thereby run the hydrostat at higher efficiency, as well as the possibility of hybridization of the drivetrain. Currently on the market are fixed and discrete speed LSHT radial piston motors and high speed low torque variable displacement axial piston motors. The radial piston motors are displacement dense but are not continuously variable, whereas the axial piston motors are continuously variable but require gearboxes, introducing packaging and robustness concerns. The Variable Displacement Linkage Motor (VDLM) is a LSHT motor that is continuously variable. It offers several benefits over current LSHT motors in that it is highly efficient over its operating range, it has low torque ripple, and it is displacement dense due to its multi-lobed cam and radial packaging. As with the design of any motor, the process is iterative and must be performed whenever performance objectives change. This paper describes an automated method for rapid exploration of the solution space for a variable displacement motor with specific application to the VDLM. This method leads to a motor design that theoretically can achieve 97% efficiency with a torque ripple below 5% at full displacement.},
doi = {},
journal = {Proceedings of the ASME/BATH Symposium on Fluid Power and Motion Control (FPMC2109)},
number = 1,
volume = 1,
place = {United States},
year = {2019},
month = {10}
}

Conference:
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