Title :
An assessment of ultra-capacitors as the power cache in Toyota THS-II, GM-Allision AHS-2 and Ford FHS hybrid propulsion systems
Author :
Miller, John M. ; Everett, Michael
Author_Institution :
J-N-J Miller Design Services, MI
Abstract :
In this paper a brief history of the development paths leading to power split concepts is given. The power split architecture is used as the comparison platform because the global OEM´s have converged to the electronic CVT in two different configurations, Toyota and Ford to the single epicyclic gear set, THS and FHS respectively and GM-Allison to the dual epicyclic gear set, AHS designs, each requiring a pair of electric motor-generators in order to deliver their intended function. The power electronic architecture for the Toyota Hybrid System, THS can be in either a battery unbuffered THS-I or battery buffered via a buck/boost converter as in THS-II. The GM-Allison Advanced Hybrid System, AHS is configured as a battery unbuffered configuration, but it could also be realized using the battery buffered configuration. Benefits of ultra-capacitor augmentation of the energy storage system in both unbuffered and buffered configurations are investigated
Keywords :
automotive electronics; electric propulsion; hybrid electric vehicles; power convertors; power transmission (mechanical); supercapacitors; Ford FHS hybrid propulsion systems; GM-Allision AHS-2; Toyota Hybrid System; Toyota THS-II; battery unbuffered configuration; boost converter; buck converter; electric motor-generators; epicyclic gear set; power cache; power split architecture; ultracapacitors; Automated highways; Batteries; Energy storage; Engines; Flywheels; Gears; Power generation; Propulsion; Traction motors; Vehicles;
Conference_Titel :
Applied Power Electronics Conference and Exposition, 2005. APEC 2005. Twentieth Annual IEEE
Conference_Location :
Austin, TX
Print_ISBN :
0-7803-8975-1
DOI :
10.1109/APEC.2005.1452980
