A Hybrid Power Driving System with an Energy Storage Flywheel for Vehicles

Huang, Yuan Mao; Wang, Kuo-Juei

doi:10.4271/2007-01-4114

Cited by 4 publications

(5 citation statements)

References 12 publications

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“…This enabled optimization of the 3,730-kw gas turbine performance design for a steady operating point without the constraint of peak power demand. Research has also been conducted on incorporation of flywheels in passenger cars and buses for brake-energy harvesting and for supplemental peak power (Brockbank and Greenwood 2009;Hawkins et al 2003;Huang and Wang 2007). The National Aeronautics and Space Administration (NASA) (Kenny et al 2005) has built a series of advanced energy-storage flywheels for potential satellite applications.…”

Section: Introductionmentioning

confidence: 99%

Hybrid Train Power with Diesel Locomotive and Slug Car–Based Flywheels for NOx and Fuel Reduction

2012

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An energy-storage flywheel consists of a large inertia wheel sharing a common shaft with a motor generator (MG) set and with magnetic bearings to support the entire rotating assembly. Flywheels mounted on a special slug car are charged from the local utility grid and from regenerative-braking events. Usage of these power sources reduces fuel consumption and the related NOx emission by the locomotivemounted Diesel generator sets (DGS). The flywheel-supplied power can replace the DGS-supplied power in one or more of the eight fixed power settings (notches), plus idle and reverse, which are common to most locomotives either for line-haul or switchyard service. The slug cars have separate traction motors to be driven by the flywheel systems so that the flywheel power and DGS power are electrically and physically decoupled. A system model is presented that includes the train dynamics coupled with the electromechanical models for the flywheels and traction motors. The modified Davis equation is employed in the train model to account for windage and other losses. A novel, feedback-based flux-weakening control of the flywheel's motor generator current-torque and speed-back electromotive force (emf) gain is employed to increase the charge capacity, depth of discharge, and regenerative-braking efficiency for the flywheels. The simulation results show significant cost-and emissions-reduction potential for the proposed hybrid DGS-flywheel locomotive power system in line-haul and switcher service.

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Section: Introductionmentioning

confidence: 99%

Hybrid Train Power with Diesel Locomotive and Slug Car–Based Flywheels for NOx and Fuel Reduction

2012

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“…EMS designs may be classified into heuristic, optimal and suboptimal controllers [4]. Strategies that are based on heuristics can be very suitable for online-implementation, by using a rule-based [9], or fuzzy logic strategy [10]. Although these strategies offer a significant improvement in fuel economy with a relatively simple control design, it is not clear whether the result is close to the optimal solution in all situations.…”

Section: A Energy Management Strategymentioning

confidence: 99%

“…The brake is used when brake energy recuperation is constrained, e.g., by the selected driving mode, or (10). The effective wheel radius gives a constant speed ratio: r w = v v /ω w .…”

Section: E Vehiclementioning

confidence: 99%

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Optimal energy management for a flywheel-based hybrid vehicle

Berkel

Hofman

Vroemen³

et al. 2011

Proceedings of the 2011 American Control Conference

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Abstract-This paper presents the modeling and design of an optimal Energy Management Strategy (EMS) for a flywheel-based hybrid vehicle, that does not use any electrical motor/generator, or a battery, for its hybrid functionalities. The hybrid drive train consists of only low-cost components, such as a flywheel module and a continuously variable transmission. This hybrid drive train is characterized by a relatively small energy capacity (flywheel) and discrete shifts between operation modes, due to the use of clutches. The main design criterion of the optimized EMS is the minimization of the overall fuel consumption, over a pre-defined driving cycle. In addition, comfort criteria are formulated as constraints, e.g., to avoid high-frequent shifting between driving modes. The criteria are used to find the optimal sequence of driving modes and the generated engine torque. Simulations show a fuel saving potential of 20% to 39%, dependent on the chosen driving cycle.

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“…They were able to design flywheel energy storage with 240 KJ of useable energy using magnetic bearings, brushless motor/generator system and a steel rotor. Similar work was done by Bangjie, Huang and Burtt who aimed at modeling a flywheel energy storage system for use in powertrain components[46,47,[57][58][59][60][61][62][63]. Although they were able to design such a system, it was attributed with low efficiency and unresponsiveness.…”

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confidence: 87%

Preliminary Design and Analysis of an Energy Storage Flywheel

Kailasan¹

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Machinery and Controls Laboratory (ROMAC). The technical and social experiences that I have gained under his guidance will last a lifetime. I am thankful to Dr. Timothy Dimond for his fullfledged support and guidance throughout my time in ROMAC. I am especially thankful for his advising and mentoring at a very difficult time. This thesis would have not been made possible without both Prof. Allaire and Dr. Dimond. I would also like to mention my thesis committee Prof. Houston Wood, Prof. George Gillies, Prof. Andre Clarens and Dr. Wei Jiang for providing me with their valuable insights to shape up this thesis. I would like to thank all my colleagues who helped me shape up this thesis. I would like to specially mention Mr. Jason Kaplan for his time in helping me with the ROMAC codes and Mr. Parinya Ananthachaisilp for his enthusiasm and patience in helping me understand the controller design. I shall always be indebted to my family for their constant support and encouragement during this time period. I would like to thank my wife, Subhashini Vel, for being there for me whenever I needed help or a shoulder. I am thankful to my parents, Muthaiyan Kailasan and Thangamani Kailasan, for showing me the right path when in doubt. I would also like to thank my sister, Dr. Kruthikaveni Kailasan, and my brother in law, Dr. Vinodh kumar, for being a pillar of strength and support. Special thanks to my nephew, Vishaal Vinodhkumar, for helping me balance work and play. I would like to end my note by mentioning that my graduate life at ROMAC and UVA has provided me with the necessary tools to succeed in my career and more importantly, to succeed as a human being.

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A Hybrid Power Driving System with an Energy Storage Flywheel for Vehicles

Cited by 4 publications

References 12 publications

Hybrid Train Power with Diesel Locomotive and Slug Car–Based Flywheels for NOx and Fuel Reduction

Hybrid Train Power with Diesel Locomotive and Slug Car–Based Flywheels for NOx and Fuel Reduction

Optimal energy management for a flywheel-based hybrid vehicle

Preliminary Design and Analysis of an Energy Storage Flywheel

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