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Quick Electrical Drive Selection Method for Bus Retrofitting

Author

Listed:
  • Maciej Kozłowski

    (Faculty of Transport, Warsaw University of Technology, 00-661 Warszawa, Poland)

  • Andrzej Czerepicki

    (Faculty of Transport, Warsaw University of Technology, 00-661 Warszawa, Poland)

Abstract

The article concerns the issue of retrofitting (i.e., the conversion of worn-out diesel buses into electric buses). As this solution is often cheaper than purchasing new electric buses, it can be attractive for low-population areas with a weaker economic infrastructure. The article aims to present an original method for rapidly selecting components for the electric traction system, such as the electric motor, inverter, and transmission systems, combined with a battery installed in a drawer. The battery swapping solution is dedicated to regions with underdeveloped power infrastructure that does not allow for fast charging of bus batteries using pantographs. A mathematical model in the form of a polynomial was developed to estimate the energy losses for a given route. This model consists of a bus physics model, an energy loss model in the propulsion system, and a battery model. The weight coefficients of the polynomials were determined based on an analytical analysis of the model dependencies. The obtained models were reduced using the Lasso regularization method in linear regression. The input data for the model includes route characteristics (or driving cycle) and technical characteristics of the traction system components. The model output provides a detailed profile of electric energy consumption and peak values of the drive system characteristics (e.g., maximum torque of the motor) which must not be exceeded. Implemented as computer software, the model—combined with a database of motors, inverters, drive transmission systems, and batteries—allows for a quick calculation of the possibilities of applying a selected configuration to cover a given route. The approach proposed in the article enables the rapid composition of electric traction devices based on required driving conditions during the initial vehicle prototyping stage. At the same time, it allows the state of the bus battery to be monitored and estimates the remaining range during the operation of upgraded buses.

Suggested Citation

  • Maciej Kozłowski & Andrzej Czerepicki, 2023. "Quick Electrical Drive Selection Method for Bus Retrofitting," Sustainability, MDPI, vol. 15(13), pages 1-17, July.
    • Handle: RePEc:gam:jsusta:v:15:y:2023:i:13:p:10484-:d:1186031
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    References listed on IDEAS

    as
    1. Xingxing Wang & Peilin Ye & Yujie Zhang & Hongjun Ni & Yelin Deng & Shuaishuai Lv & Yinnan Yuan & Yu Zhu, 2022. "Parameter Optimization Method for Power System of Medium-Sized Bus Based on Orthogonal Test," Energies, MDPI, vol. 15(19), pages 1-26, October.
    2. Orhan Topal & İsmail Nakir, 2018. "Total Cost of Ownership Based Economic Analysis of Diesel, CNG and Electric Bus Concepts for the Public Transport in Istanbul City," Energies, MDPI, vol. 11(9), pages 1-17, September.
    3. Hao Liu & Xianjin Huang & Fei Lin & Zhongping Yang, 2017. "Loss Model and Efficiency Analysis of Tram Auxiliary Converter Based on a SiC Device," Energies, MDPI, vol. 10(12), pages 1-20, December.
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    Cited by:

    1. Chandrasekhar Reddy Gade & Razia Sultana Wahab, 2023. "Conceptual Framework for Modelling of an Electric Tractor and Its Performance Analysis Using a Permanent Magnet Synchronous Motor," Sustainability, MDPI, vol. 15(19), pages 1-24, September.

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