Authors: V.M. Zavyalov, E.A. Dubkov, I.Yu. Semykina, V.V. Kolodyazhny

Title of the article: The possibility evaluation of using a wireless charging station for a mine electric locomotive

Year: 2023, Issue: 3, Pages: 22-28

Branch of knowledge: 2.4.2. Electrotechnical complexes and systems (engineering)

Index UDK: 316.4.057.4, 621.313-57, 622-1/-9

DOI: 10.26730/1816-4528-2023-3-22-28

Abstract: Wireless chargers based on inductive power transfer (IPT) are promising for charging batteries of mining electric locomotives as they don’t require a wire connection between charger and battery, thus there is no possibility of a spark during connection or disconnection that might cause ignition and explosion. The calculations for mining electric locomotives SDPM-13 showed that the best energy characteristics are obtained using IPT with the coils size of 3x0.7 m, when windings have one turn. The mathematical analysis proved that such a design is sufficient to transfer the required amount of power at a voltage of the power supply source of 380 V. The proposed approach uses the transfer function reflecting the ratio between the primary current and the secondary current that is obtained from the mathematical model describing the power transfer at the wireless charger. This transfer function helped to get the amplitude-frequency response and phase-frequency response under a rated load and both coils alignment and misalignment. The data obtained were used for computer simulation of the magnetic field density in the vicinity of the coils by the finite element method. The simulation results showed that in order to exclude the heating of foreign metal objects above the maximum surface temperature for equipment of the temperature class T1, it is sufficient to make a physical barrier around the coils wires with a radius of 3 cm. In general, this research has confirmed the applicability of wireless chargers with IPT for batteries of mining electric locomotives in gaseous-and-dusty mines.

Key words: battery wireless charger mining electric locomotive explosion safety high frequency magnetic field simulation

Receiving date: 10.05.2023

Approval date: 15.06.2023

Publication date: 11.07.2023

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