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Author: Velev B.

  • TECHNOLOGICAL BASIS OF “INDUSTRY 4.0”

    COMPARATIVE ANALYSIS OF LITHIUM-ION BATTERIES FOR EV/HEV APPLICATIONS

    • Velev B.
    Industry 4.0, Vol. 3 (2018), Issue 2, pg(s) 73-76
    • Abstract
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    For the serial production of electric cars, the development of Li-Ion cell technology to achieve high energy density of packaging batteries is critical and is subject to great research and development. This paper reviews the latest developments in cell technology and cathode chemistry for the production of traction lithium-ion batteries. Are made non-destructive testing and comparative analysis of the most important characteristics of the batteries with the known Li-Ion cell electrochemistry. The advantages and disadvantages of different types of Li-Ion cells are presented. Conclusions were made on the degree of applicability of the respective types of lithium-ion batteries in EV / HEV applications.

  • COMPARATIVE ANALYSIS OF PMAC MOTORS FOR EV AND HEV APPLICATIONS

    • Velev B.
    Machines. Technologies. Materials., Vol. 8 (2014), Issue 2, pg(s) 32-36
    • Abstract
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    In current work is made comparison between the differences in structure methods of propulsion and price of two types of motors with permanent magnets and AC drive (PMAC). PMAC is common name of electric motors – permanent magnets synchronous motor (PMSM) and brushless permanent magnet motor (BLDC). On the basis of comparative studies is selected and tested construction and propulsion of low-cost BLDC motor, suitable for hybrid transmission of HEV.

  • DYNAMIC MODEL OF USING POWERED LITHIUM-ION BATTERIES FOR EV / HEV APPLICATIONS

    • Velev B.
    • Ivanov Iv.
    Machines. Technologies. Materials., Vol. 8 (2014), Issue 2, pg(s) 29-31
    • Abstract
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    model of charging and discharging of the battery is validated experimentally with a traction battery used in EV / HEV. An interesting feature of this model is the simplicity for extracting of the dynamic parameters of technical specifications of the battery. Only two points on the curve for the discharge of the battery in the steady state are required to obtain the necessary parameters. The model of the battery is included in the simulation using the LabJack U12 in the programming environment LabVIEW2012 for EV / HEV applications. The results show that the model can accurately represent the dynamic behavior of the battery during use of EV / HEV vehicles.

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