Design of a direct current motor with a windingless rotor for electric vehicles

Authors

DOI:

https://doi.org/10.15587/1729-4061.2021.231733

Keywords:

DC motor, armature transverse reaction, number of pole pairs, switch

Abstract

Modern electric vehicles typically exploit synchronous motors with magnetoelectric excitation as traction engines. While possessing a series of undeniable advantages, the synchronous motor has one significant drawback ‒ the high cost predetermined by the high price of permanent magnets. In addition, the impossibility to disable a magnetic field in case of engine malfunction can lead to an emergency on the road. Given this, there is a need to design new structures of electrical machines with electromagnetic excitation.

The structure of a DC traction motor with electromagnetic excitation involving the rotor or stator segmentation makes it possible to considerably weaken the field of the armature transverse reaction by decreasing magnetic conductivity of the magnetic circuit in the transverse direction. Therefore, such a structure lacks commutating poles and a compensation winding. There are no permanent magnets in the structure, all windings are stationary, an electronic switch is used instead of a collector, and a windingless low-inertia rotor does not require additional measures to remove heat. That all has made it possible to significantly reduce the cost of active materials for the traction engine and improve its reliability.

To test the performance of the new design, a full-size model of the engine and a working experimental prototype were fabricated. Applying a synchronous jet engine with magnetization for the BMW i3 electric car as an analog, the engine calculations were performed and its simulation was carried out. The results of the analysis show that the mass of the new engine is 35 % greater than the mass of the analog but the cost of active materials is less than that of the analog by 63 %. The results testify to the possibility of implementing a given structure industrially

Author Biographies

Dmytro Ivliev, Odessа Polytechnic State University

PhD, Associate Professor

Department of Electromechanical Engineering

Volodymyr Kosenkov, Khmelnytskyi National University

PhD, Professor, Head of Department

Department of Physics and Electrical Engineering

Oleksandr Vynakov, Odessа Polytechnic State University

PhD, Associate Professor

Department of Electromechanical Engineering

Elvira Savolova, Odessа Polytechnic State University

Senior Lecturer

Department of Electromechanical Engineering

Viktoria Yarmolovych, Odessа Polytechnic State University

Senior Lecturer

Department of Electromechanical Engineering

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Published

2021-08-31

How to Cite

Ivliev, D., Kosenkov, V., Vynakov, O., Savolova, E., & Yarmolovych, V. (2021). Design of a direct current motor with a windingless rotor for electric vehicles . Eastern-European Journal of Enterprise Technologies, 4(5(112), 41–50. https://doi.org/10.15587/1729-4061.2021.231733

Issue

Vol. 4 No. 5(112) (2021): Applied physics

Section

Applied physics

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Copyright (c) 2021 Dmytro Ivliev, Volodymyr Kosenkov, Oleksandr Vynakov, Elvira Savolova, Viktoria Yarmolovych

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