Problems of the Regional Energetics (Jun 2019)

Analysis of Technical and Energy Indicators of a Multi-Motor Electric Drive for Urban Public Transport

  • Voytenko V.A.,
  • Vodichev V.A.,
  • Kalinin A.G.

DOI
https://doi.org/10.5281/zenodo.3239179
Journal volume & issue
Vol. 41, no. 1-2
pp. 95 – 106

Abstract

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The aim of this article was to analyze the profitability of using a multi-motor electric drive instead of a single-motor electric drive in a city vehicle to ensure the reduction of the electrical energy losses. To achieve the goal a mathematical model was used to calculate the energy losses in the single-motor and multi-motor electric drives of a bus with a different number of traction induction motors. The calculation was carried out for the steady-state driving modes with different speeds and transient acceleration modes. The change in the load torque of the vehicle's motors due to the change in the roll-ing friction force of the wheels with a different number of passengers carried was taken into account. The novelty of the work is that the use of a multi-motor electric drive shown for the first time allowed the reduction in the energy losses in the traction induction electric motors when the vehicle is moving at a constant speed and during acceleration with a different number of passengers carried. Moreover, to obtain energy saving, the number of motors used in a multi-motor electric drive should vary de-pending on the speed and acceleration, as well as on the total load torque of the multi-motor drive. The formula was obtained analytically for the calculation of the number of motors of a multi-motor electric drive, which would ensure energy saving compared to a single-motor electric vehicle.

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