This paper proposes a new energy storage system (ESS) design including both batteries and ultracapacitors (UC) in hybrid electric vehicle (HEV) and electric vehicle (EV) applications. The conventional designs require a dc-dc converter to interface the UC unit. Herein, the UC can be directly switched across the motor drive dc-link during the peak power demands. The resulting wide voltage variation due to UC power transfer is addressed by the simple modulator introduced in this paper, so that the motor drive performance is not disrupted. Based on this new methodology, the paper further introduces two ESS schemes with different topologies, UC rating and energy flow control. They are applicable to both lightly and heavily hybridized HEVs. Both schemes have the benefits of high efficiency (without a dc-dc link) and low cost. The simulation and experimental results validate the new methodology
S. Lu et al., "High Efficiency Energy Storage System Design for Hybrid Electric Vehicle with Motor Drive Integration," Conference Record of the 2006 IEEE Industry Applications Conference 41st IAS Annual Meeting, Institute of Electrical and Electronics Engineers (IEEE), Oct 2006.
The definitive version is available at http://dx.doi.org/10.1109/IAS.2006.256899
2006 IEEE Industry Applications Conference 41st IAS Annual Meeting
Electrical and Computer Engineering
Keywords and Phrases
DC Motor Drives; DC-DC Power Convertors; Energy Storage; Hybrid Electric Vehicles
Article - Conference proceedings
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