Evaluation of power regeneration in primary suspension for a railway vehicle
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RESEARCH ARTICLE
Ruichen WANG, Zhiwei WANG
Evaluation of power regeneration in primary suspension for a railway vehicle
© Higher Education Press and Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract To improve the fuel economy of rail vehicles, this study presents the feasibility of using power regenerating dampers (PRDs) in the primary suspension systems of railway vehicles and evaluates the potential and recoverable power that can be obtained. PRDs are configured as hydraulic electromagnetic-based railway primary vertical dampers and evaluated in parallel and series modes (with and without a viscous damper). Hydraulic configuration converts the linear behavior of the track into a unidirectional rotation of the generator, and the electromagnetic configuration provides a controllable damping force to the primary suspension system. In several case studies, generic railway vehicle primary suspension systems that are configured to include a PRD in the two configuration modes are modeled using computer simulations. The simulations are performed on measured tracks with typical irregularities for a generic UK passenger route. The performance of the modified vehicle is evaluated with respect to key performance indicators, including regenerated power, ride comfort, and running safety. Results indicate that PRDs can simultaneously replace conventional primary vertical dampers, regenerate power, and exhibit desirable dynamic performance. A peak power efficiency of 79.87% is theoretically obtained in series mode on a top-quality German Intercity Express track (Track 270) at a vehicle speed of 160 mile/h (~257 km/h). Keywords railway vehicle, primary damper, power regeneration, ride comfort, running safety
Received April 17, 2019; accepted September 5, 2019 Ruichen WANG Institute of Railway Research, University of Huddersfield, Huddersfield HD1 3DH, UK
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Zhiwei WANG ( ) State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031, China E-mail: [email protected]
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Introduction
The possibility of using recoverable energy in vehicle suspension systems has elicited considerable attention in recent years. Various design concepts and arrangements of regenerative suspensions have been proposed and investigated for the recovery of energy from motion and vibration due to road/track disturbances. However, these studies have focused on energy conversion from kinetic energy to electricity in road transports [1–5]. Meanwhile, the potential for similar applications of power regenerating dampers (PRDs) to the rail sector remains to be explored. In a typical passenger rail vehicle, a considerable amount of motive energy is wasted by the resistance from track irregularity, the friction between moving parts, and thermal losses. The kinetic energy loss of primary and secondary dampers is one of the notable causes of energy loss in rail vehicles, with a total dissipated power between 3.5 and 3.8 kW per vehicle [6,7]. Zuo and Zhang [8] estimated potential energy regeneration in different possible applicati
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