Chengshi guidao jiaotong yanjiu (Feb 2024)

Urban Rail Transit Vehicle Light-weighting and Energy-saving Technologies

  • Chengpeng CAO,
  • Juncai YAN,
  • Xingjia WANG

DOI
https://doi.org/10.16037/j.1007-869x.2024.02.047
Journal volume & issue
Vol. 27, no. 2
pp. 242 – 246

Abstract

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[Objective] The increasing use of fully automated driving and high-redundancy technologies in urban rail transit vehicles (hereinafter referred to as ′metro′) leads to the increase of on-board device amount to varying degrees, resulting in the increasing mass of metro vehicles. Additionally, due to the significant overall transport capacity of metro vehicles, their overall energy consumption remains at a higher level. Therefore, it is necessary to study the light-weighting and energy-saving technologies for metro vehicles. [Method] Measures for reducing the weight of carbody, traction and auxiliary power systems, bogies and braking systems, air-conditioning and door systems, couplers and gangways, as well as vehicle interior and compartment equipment, are introduced. Energy-saving measures for the traction and auxiliary power systems, air-conditioning system, and lighting system are presented respectively. [Result & Conclusion] Feasible light-weighting measures include adopting a full aluminum carbody structure for , utilizing permanent magnet synchronous motors for the traction system, employing high-frequency auxiliary inverters for auxiliary power system, implementing high-frequency soft-switching design for chargers, adopting light-weighting design for bogies, modular design for braking system, and new material for interior and compartment equipment. Available energy-saving measures include the adoption of permanent magnet synchronous motor in traction system, the application of high-frequency topological structure for auxiliary power system, the use of frequency converter technology for air-conditioning system, and OLED (organic light-emitting diode) light sources for lighting system. By implementing the described light-weighting and energy-saving measures, the target of vehicle overall light-weighting by over 10% and achieving energy-saving of over 10% can be effectively realized.

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