STUDY OF THE EFFICIENCY OF THE ELECTIC VEHICLE DRIVES WITH INDEPEND-ENT POWER SUPPLY WITH SUPERCAPACITORS IMPLEMENTING DC-DC CONVERTER

  • Микола Якович Островерхов Национальный технический университет Украины «Киевский политехнический институт ім. И. Сикорского» https://orcid.org/0000-0002-7322-8052
  • Данило Ярославович Трінчук National Technical University of Ukraine «Igor Sikorsky Kyiv Polytechnic Institute» https://orcid.org/0000-0001-6022-9323

Abstract

The electric vehicle drive with an independent power supply with supercapacitor battery and dc-dc converter is the object of this study. Electric vehicles nowadays become more and more popular, competing with the internal combustion engine vehicles. However, the electric vehicle drives have some considerable drawbacks. Even though the efficiency of the electric motor is significantly greater than the one of internal combustion engines, other elements of the drive such as power supply produce heat losses as well. Reducing these losses will lead to decreasing of energy consumption of electric vehicles and therefore will help them to become more competitive on the vehicle market. The Li-Ion accumulators, which are used as the power supply, have large impedance that leads to significant energy losses on this element. The solution of this problem can be found by connecting a supercapacitor battery in-parallel to the accumulator, which will help reducing these losses. It is important, though, to know the exact magnitude of the battery capacitance needed for the drive due to the expensiveness and big weight of supercapacitors. In order to find this optimal capacitance for a specific electric vehicle – electric scooter – a Matlab Simulink model of the electric drive was created in this study. The modeling has shown that there is indeed the specific magnitude of the capacitance, using which the least possible energy consumption is achieved. Moreover it is possible to reduce the losses even more by implementing in the circuit a supercapacitor recharging system, created, modeled, and described in this work. This system does not require any additional power components in the electric drive scheme and therefore does not increase the cost and energy consumption of the whole drive. It was calculated in this study that with usage of both the correct supercapacitor and the recharging system the energy consumption of the electric scooter working on the urban drive cycle can be decreased by 5.23%.

Author Biographies

Микола Якович Островерхов, Национальный технический университет Украины «Киевский политехнический институт ім. И. Сикорского»

Dr. of Science, Professor, Head of the Department of Theoretical Electrical Engineering, National Technical University of Ukraine «Igor Sikorsky Kyiv Polytechnic Institute»

Данило Ярославович Трінчук, National Technical University of Ukraine «Igor Sikorsky Kyiv Polytechnic Institute»

postgraduate, Department of Theoretical Electrical Engineering, National Technical University of Ukraine «Igor Sikorsky Kyiv Polytechnic Institute»

Published
2019-01-21
How to Cite
Островерхов, М., & Трінчук, Д. (2019). STUDY OF THE EFFICIENCY OF THE ELECTIC VEHICLE DRIVES WITH INDEPEND-ENT POWER SUPPLY WITH SUPERCAPACITORS IMPLEMENTING DC-DC CONVERTER. Electrotechnic and Computer Systems, (29(105), 58-65. https://doi.org/10.15276/eltecs.29.105.2018.6
Section
Energy saving technologies in electric power industry