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Direct oil cooling of traction motors in hybrid drives

Huang, Zhe LU ; Nategh, Shafigh; Alaküla, Mats LU ; Lassila, Viktor and Yuan, Jinliang (2012) Electric Vehicle Conference (IEVC), 2012 IEEE International In 2012 IEEE International Electric Vehicle Conference (IEVC 2012) p.43-43
Abstract
This paper presents comparisons of utilizing direct oil cooling approaches and conventional indirect cooling approaches for electrical motors which are mounted in HEVs or ZEVs. Both finite volume Computational Fluid Dynamic (CFD) model by FLUENT and finite element electromagnetic model by JMAG are applied to make the simulation accurate and comprehensive. Average temperature over the stator back, pressure drop between inlet and outlet and average heat transfer coefficient over the cooling duct are evaluated under identical flow rate, velocity and pressure drop for different cooling approaches. In addition, the influences on torque and power performances by the cooling ducts made in the housing or stator back are evaluated by JMAG model.... (More)
This paper presents comparisons of utilizing direct oil cooling approaches and conventional indirect cooling approaches for electrical motors which are mounted in HEVs or ZEVs. Both finite volume Computational Fluid Dynamic (CFD) model by FLUENT and finite element electromagnetic model by JMAG are applied to make the simulation accurate and comprehensive. Average temperature over the stator back, pressure drop between inlet and outlet and average heat transfer coefficient over the cooling duct are evaluated under identical flow rate, velocity and pressure drop for different cooling approaches. In addition, the influences on torque and power performances by the cooling ducts made in the housing or stator back are evaluated by JMAG model. The directly cooled motors show lower temperature rises at the stator back since the direct contact between coolant and stator back can avoid the unnecessary thermal contact resistances between the stator back and housing, meanwhile make the coolant more close to the heat sources, and thus improve the cooling efficiency. (Less)
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author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
CFD, EV, FEA, HEV, direct cooling, forced cooling, traction motor
in
2012 IEEE International Electric Vehicle Conference (IEVC 2012)
pages
8 pages
conference name
Electric Vehicle Conference (IEVC), 2012 IEEE International
external identifiers
  • scopus:84860788073
ISBN
978-1-4673-1562-3
DOI
10.1109/IEVC.2012.6183163
language
English
LU publication?
yes
id
99bae223-46d8-42d3-a734-ab2ce40b31a4 (old id 3564035)
alternative location
http://ieeexplore.ieee.org/xpl/articleDetails.jsp?reload=true&arnumber=6183163
date added to LUP
2013-03-18 12:50:41
date last changed
2017-03-12 04:31:30
@inproceedings{99bae223-46d8-42d3-a734-ab2ce40b31a4,
  abstract     = {This paper presents comparisons of utilizing direct oil cooling approaches and conventional indirect cooling approaches for electrical motors which are mounted in HEVs or ZEVs. Both finite volume Computational Fluid Dynamic (CFD) model by FLUENT and finite element electromagnetic model by JMAG are applied to make the simulation accurate and comprehensive. Average temperature over the stator back, pressure drop between inlet and outlet and average heat transfer coefficient over the cooling duct are evaluated under identical flow rate, velocity and pressure drop for different cooling approaches. In addition, the influences on torque and power performances by the cooling ducts made in the housing or stator back are evaluated by JMAG model. The directly cooled motors show lower temperature rises at the stator back since the direct contact between coolant and stator back can avoid the unnecessary thermal contact resistances between the stator back and housing, meanwhile make the coolant more close to the heat sources, and thus improve the cooling efficiency.},
  author       = {Huang, Zhe and Nategh, Shafigh and Alaküla, Mats and Lassila, Viktor and Yuan, Jinliang},
  booktitle    = {2012 IEEE International Electric Vehicle Conference (IEVC 2012)},
  isbn         = {978-1-4673-1562-3},
  keyword      = {CFD,EV,FEA,HEV,direct cooling,forced cooling,traction motor},
  language     = {eng},
  pages        = {43--43},
  title        = {Direct oil cooling of traction motors in hybrid drives},
  url          = {http://dx.doi.org/10.1109/IEVC.2012.6183163},
  year         = {2012},
}