Comparison of Powertrain System Configurations for Electric Passenger Vehicles

Walker, PD; Roser, H; Zhang, N; Fang, Y

Comparison of Powertrain System Configurations for Electric Passenger Vehicles

Walker, PD

Roser, H Zhang, N

Fang, Y

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Publication Type:: Conference Proceeding
Citation:: SAE Technical Papers, 2015, 2015-March (March)
Issue Date:: 2015-03-10

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Field	Value	Language
dc.contributor.author	Walker, PD https://orcid.org/0000-0003-3988-3966	en_US
dc.contributor.author	Roser, H	en_US
dc.contributor.author	Zhang, N https://orcid.org/0000-0001-6408-0044	en_US
dc.contributor.author	Fang, Y	en_US
dc.date.issued	2015-03-10	en_US
dc.identifier.citation	SAE Technical Papers, 2015, 2015-March (March)	en_US
dc.identifier.uri	http://hdl.handle.net/10453/42153
dc.description.abstract	Copyright © 2015 SAE International. Electric vehicles (EV) are considered a practical alternative to conventional and hybrid electric passenger vehicles, with higher overall powertrain efficiencies by omitting the internal combustion engine. As a consequence of lower energy density in the battery energy storage as compared to fossil fuels powered vehicles, EVs have limited driving range, leading to a range phobia and limited consumer acceptance. Particularly for larger luxury EVs, electric motors with a single reduction gear typically do not achieve the diverse range of function needs that are present in multi-speed conventional vehicles, most notably acceleration performance and top speed requirements. Subsequently, multi-speed EV powertrains have been suggested for these applications. Through the utilization of multiple gear ratios a more diverse range of functional needs can be realized without increasing the practical size of the electric motor. The major limitation of multi-speed EV powertrains is that the increased transmission complexity introduces additional losses to the vehicle. Through a number of simulations this paper studies the integration of multispeed transmission with EV platforms. Particularly, it investigates the performance improvements of both B and E class vehicle platforms realized through utilization of two and three speed transmissions. Also the potential application of hybrid energy storage systems (i.e. batteries combined with super-capacitors) is studied. Results demonstrate that there can be significant benefits attained for both small and large passenger vehicles through the application of multi-speed transmissions. However, optimization of these ratios must be considered in the analysis.	en_US
dc.relation	http://purl.org/au-research/grants/arc/DP150102751
dc.relation.ispartof	SAE Technical Papers	en_US
dc.relation.isbasedon	10.4271/2015-01-0052	en_US
dc.title	Comparison of Powertrain System Configurations for Electric Passenger Vehicles	en_US
dc.type	Conference Proceeding
utslib.citation.volume	March	en_US
utslib.citation.volume	2015-March	en_US
utslib.for	0902 Automotive Engineering	en_US
utslib.for	0910 Manufacturing Engineering	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Mechanical and Mechatronic Engineering
utslib.copyright.status	open_access
pubs.issue	March	en_US
pubs.publication-status	Published	en_US
pubs.volume	2015-March	en_US

Abstract:

Copyright © 2015 SAE International. Electric vehicles (EV) are considered a practical alternative to conventional and hybrid electric passenger vehicles, with higher overall powertrain efficiencies by omitting the internal combustion engine. As a consequence of lower energy density in the battery energy storage as compared to fossil fuels powered vehicles, EVs have limited driving range, leading to a range phobia and limited consumer acceptance. Particularly for larger luxury EVs, electric motors with a single reduction gear typically do not achieve the diverse range of function needs that are present in multi-speed conventional vehicles, most notably acceleration performance and top speed requirements. Subsequently, multi-speed EV powertrains have been suggested for these applications. Through the utilization of multiple gear ratios a more diverse range of functional needs can be realized without increasing the practical size of the electric motor. The major limitation of multi-speed EV powertrains is that the increased transmission complexity introduces additional losses to the vehicle. Through a number of simulations this paper studies the integration of multispeed transmission with EV platforms. Particularly, it investigates the performance improvements of both B and E class vehicle platforms realized through utilization of two and three speed transmissions. Also the potential application of hybrid energy storage systems (i.e. batteries combined with super-capacitors) is studied. Results demonstrate that there can be significant benefits attained for both small and large passenger vehicles through the application of multi-speed transmissions. However, optimization of these ratios must be considered in the analysis.

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http://hdl.handle.net/10453/42153