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Optimization of a Cascaded H-Bridge Inverter for Electric Vehicle Applications Including Cost Consideration

Author

Listed:
  • Felix Roemer

    (TUM CREATE Ltd., 1 CREATE Way, #10-02 CREATE Tower, Singapore 138602, Singapore
    Institute of Automotive Technology, Technical University of Munich, Boltzmannstr. 15, 85748 Garching, Germany)

  • Massab Ahmad

    (TUM CREATE Ltd., 1 CREATE Way, #10-02 CREATE Tower, Singapore 138602, Singapore
    Institute of Automotive Technology, Technical University of Munich, Boltzmannstr. 15, 85748 Garching, Germany)

  • Fengqi Chang

    (TUM CREATE Ltd., 1 CREATE Way, #10-02 CREATE Tower, Singapore 138602, Singapore
    Institute of Automotive Technology, Technical University of Munich, Boltzmannstr. 15, 85748 Garching, Germany)

  • Markus Lienkamp

    (Institute of Automotive Technology, Technical University of Munich, Boltzmannstr. 15, 85748 Garching, Germany)

Abstract

This paper presents a method to find the optimal configuration for an electric vehicle energy storage system using a cascaded H-bridge (CHB) inverter. CHB multilevel inverters enable a better utilization of the battery pack, because cells/modules with manufacturing tolerances in terms of capacity can be selectively discharged instead of being passively balanced by discharging them over resistors. The balancing algorithms have been investigated in many studies for the CHB topology. However, it has not yet been investigated to which extend a conventional pack can be modularized in a CHB configuration. Therefore, this paper explores different configurations by simulating different switch models, switch configurations, and number of levels for a CHB inverter along with a reference load model to find the optimal design of the system. The configuration is also considered from an economically point of view, as the most efficient solution might not be cost-effective to be installed in a common production vehicle. It is found that four modules per phase give the best compromise between efficiency and costs. Paralleling smaller switches should be preferred over the usage of fewer, larger switches. Moreover, selecting specific existing components results in higher savings compared to theoretical optimal components.

Suggested Citation

  • Felix Roemer & Massab Ahmad & Fengqi Chang & Markus Lienkamp, 2019. "Optimization of a Cascaded H-Bridge Inverter for Electric Vehicle Applications Including Cost Consideration," Energies, MDPI, vol. 12(22), pages 1-19, November.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:22:p:4272-:d:285213
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    References listed on IDEAS

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    1. Muxuan Xiao & Qianming Xu & Honglin Ouyang, 2017. "An Improved Modulation Strategy Combining Phase Shifted PWM and Phase Disposition PWM for Cascaded H-Bridge Inverters," Energies, MDPI, vol. 10(9), pages 1-14, September.
    2. Pavlovic, J. & Ciuffo, B. & Fontaras, G. & Valverde, V. & Marotta, A., 2018. "How much difference in type-approval CO2 emissions from passenger cars in Europe can be expected from changing to the new test procedure (NEDC vs. WLTP)?," Transportation Research Part A: Policy and Practice, Elsevier, vol. 111(C), pages 136-147.
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    Cited by:

    1. Vijayaraja Loganathan & Ganesh Kumar Srinivasan & Marco Rivera, 2020. "Realization of 485 Level Inverter Using Tri-State Architecture for Renewable Energy Systems," Energies, MDPI, vol. 13(24), pages 1-29, December.

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