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High Efficiency Energy Storage System Design For Hybrid Electric Vehicle With Motor Drive Integration, Shuai Lu, Keith Corzine, Mehdi Ferdowsi
High Efficiency Energy Storage System Design For Hybrid Electric Vehicle With Motor Drive Integration, Shuai Lu, Keith Corzine, Mehdi Ferdowsi
Electrical and Computer Engineering Faculty Research & Creative Works
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 …
An Unique Ultracapacitor Direct Integration Scheme In Multilevel Motor Drives For Large Vehicle Propulsion, Shuai Lu, Keith Corzine, Mehdi Ferdowsi
An Unique Ultracapacitor Direct Integration Scheme In Multilevel Motor Drives For Large Vehicle Propulsion, Shuai Lu, Keith Corzine, Mehdi Ferdowsi
Electrical and Computer Engineering Faculty Research & Creative Works
This paper introduces a new set of methods to directly integrate ultracapacitor banks into cascaded multilevel inverters used for large vehicle propulsion. The idea is to replace the regular dc-link capacitors with ultracapacitors in order to combine the energy storage unit and motor drive. This approach eliminates the need for an interfacing dc-dc converter and considerably improves the efficiency of regenerative braking energy restoration in electric and hybrid vehicles. Utilizing the proposed modulation control set, the two cascaded inverters can have their dc voltage levels maintained at any ratio (even a noninteger ratio) or dynamically varied over a wide range …
Analysis Of The Double-Tiered Three-Battery Switched Capacitor Battery Balancing System, Andrew Baughman, Mehdi Ferdowsi
Analysis Of The Double-Tiered Three-Battery Switched Capacitor Battery Balancing System, Andrew Baughman, Mehdi Ferdowsi
Electrical and Computer Engineering Faculty Research & Creative Works
The auto industry is progressing towards hybrid and fully electric vehicles in their future car models. These vehicles need a power plant that is reliable during the lifetime of the car. Battery and ultra-capacitor capacity imbalances stemming from manufacturing and ensuing driving environment and operational usage affect voltage levels, which must adhere to strict limits to ensure the safety of the driver. A double-tiered capacitive shuttling technique is applied to an idealized three-battery system simulation in order to balance the voltages. Parameters in the system are varied and their effects on the system determined. Results are compared to a single-tiered …
New Double Input Dc-Dc Converters For Automotive Applications, Krishna P. Yalamanchili, Mehdi Ferdowsi, Keith Corzine
New Double Input Dc-Dc Converters For Automotive Applications, Krishna P. Yalamanchili, Mehdi Ferdowsi, Keith Corzine
Electrical and Computer Engineering Faculty Research & Creative Works
The energy storage unit is one of the most important subsystems in the structure of hybrid electric vehicles since it directly impacts the performance, fuel economy, cost, and weight of the vehicle. New structures for the energy storage unit, which utilize both batteries and ultracapacitors, are widely under investigation. In order to fully utilize the advantages of each energy storage device, employment of multi-input power converters is inevitable. In this paper, two new double input converters are introduced. Their different operating modes are analyzed and their voltage transfer ratios are derived. Simulation results are used to verify the expected operational …