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Title: MODELING AND OPTIMIZATION STUDY OF A TIGHTLY INTEGRATED ROTARY ELECTRIC MOTOR-HYDRAULIC PUMP

Abstract

To meet the growing trend of electrification of mechanical systems, this paper presents a compactly integrated electric motor and hydraulic pump. The proposed application for this machine requires high flow rates at low pressure differentials and four quadrant operation. The hydraulic pump architecture selected for this machine is a radial ball piston pump. An inside impinged version of this architecture allows for efficient filling of the chambers and is radial balanced, both of which allow high- speed operation for increased power density. The radial ball piston pump is less expensive to manufacture and is radially more compact than a standard radial cylindrical piston pump. A model of the pump and the integrated electric motor have been created to study scaling relationships and drive detailed design and optimization. The scaling study considers how displacement is affected by pump diameter, and how the diameter and required torque change with angular velocity. The detailed model considers the effect of valve timing, piston-cylinder clearance, and pump geometry on the efficiency. The model is then exercised in an optimization of the machine parameters.

Authors:
 [1];  [2]; ORCiD logo [2];  [3]
  1. University of Minnesota
  2. University of Wisconsin, Madison
  3. Univ. of Minnesota, Minneapolis, MN (United States)
Publication Date:
Research Org.:
University of Minnesota, Twin Cities
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V)
OSTI Identifier:
1544769
Report Number(s):
FPMC2019-1626
DOE Contract Number:  
EE0008384
Resource Type:
Conference
Journal Name:
Proceedings of the 2019 ASME/BATH Symposium on Fluid Power and Motion Control
Additional Journal Information:
Conference: 2019 ASME/BATH Symposium on Fluid Power and Motion Control, October 7-9, Sarasota FL.,
Country of Publication:
United States
Language:
English
Subject:
30 DIRECT ENERGY CONVERSION; hydraulic pump, electric motor, integration, radial ball piston

Citation Formats

Bohach, Garrett R., Nishanth, FNU, Severson, Eric, and Van de Ven, James. MODELING AND OPTIMIZATION STUDY OF A TIGHTLY INTEGRATED ROTARY ELECTRIC MOTOR-HYDRAULIC PUMP. United States: N. p., 2019. Web.
Bohach, Garrett R., Nishanth, FNU, Severson, Eric, & Van de Ven, James. MODELING AND OPTIMIZATION STUDY OF A TIGHTLY INTEGRATED ROTARY ELECTRIC MOTOR-HYDRAULIC PUMP. United States.
Bohach, Garrett R., Nishanth, FNU, Severson, Eric, and Van de Ven, James. Mon . "MODELING AND OPTIMIZATION STUDY OF A TIGHTLY INTEGRATED ROTARY ELECTRIC MOTOR-HYDRAULIC PUMP". United States. https://www.osti.gov/servlets/purl/1544769.
@article{osti_1544769,
title = {MODELING AND OPTIMIZATION STUDY OF A TIGHTLY INTEGRATED ROTARY ELECTRIC MOTOR-HYDRAULIC PUMP},
author = {Bohach, Garrett R. and Nishanth, FNU and Severson, Eric and Van de Ven, James},
abstractNote = {To meet the growing trend of electrification of mechanical systems, this paper presents a compactly integrated electric motor and hydraulic pump. The proposed application for this machine requires high flow rates at low pressure differentials and four quadrant operation. The hydraulic pump architecture selected for this machine is a radial ball piston pump. An inside impinged version of this architecture allows for efficient filling of the chambers and is radial balanced, both of which allow high- speed operation for increased power density. The radial ball piston pump is less expensive to manufacture and is radially more compact than a standard radial cylindrical piston pump. A model of the pump and the integrated electric motor have been created to study scaling relationships and drive detailed design and optimization. The scaling study considers how displacement is affected by pump diameter, and how the diameter and required torque change with angular velocity. The detailed model considers the effect of valve timing, piston-cylinder clearance, and pump geometry on the efficiency. The model is then exercised in an optimization of the machine parameters.},
doi = {},
journal = {Proceedings of the 2019 ASME/BATH Symposium on Fluid Power and Motion Control},
number = ,
volume = ,
place = {United States},
year = {2019},
month = {10}
}

Conference:
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