Analysis of the mechanical limitations of the selected high-speed electric motor
Aircraft Engineering and Aerospace Technology
ISSN: 0002-2667
Article publication date: 3 July 2023
Issue publication date: 1 September 2023
Abstract
Purpose
The study aims to show the influence of selected mechanical parameters of the rotor on the maximum speed and parameters of the electric motor.
Design/methodology/approach
A simplified mechanical analysis of the rotor of the electric motor was conducted, determining the safety factor of the motor. An analysis of the impact of key rotor parameters (significant from the mechanical strength perspective) on the electromagnetic parameters and the safety factor of the selected high-speed electric motor was carried out. The influence of changes in the rotor’s geometrical dimensions (centrifugal force) on the electromagnetic parameters of the electric motor was shown.
Findings
The study shows the impact of changes in selected rotor parameters on electromagnetic parameters and the safety factor of a high-speed electric motor (at its required operating point of 45,000 rpm). The dependence of the safety factor as a function of the maximum motor speed was determined for the proposed rotor modifications.
Practical implications
The proposed modifications can be used in larger drive systems. They have practically no impact on increasing the value of the motor’s moment of inertia (they do not degrade the dynamics of the motor’s operation).
Originality/value
It was proposed to use a new design coefficient which is in relation to the motor’s safety coefficient. It has been shown that a minimal modification of the motor rotor allows to increase its maximum speed by several dozen per cent (while maintaining the safety factor). It has also been shown that when operating at maximum speed within the safe range, the change in the geometrical dimensions of the rotor hardly influences the change in the value of the centrifugal force.
Keywords
Acknowledgements
This research is financed in part by the statutory funds (UPB) of the Department of Electrodynamics and Electrical Machine Systems, Rzeszow University of Technology and in part by the Minister of Education and Science of the Republic of Poland within the “Regional Initiative of Excellence” program for years 2019–2023. Project number 027/RID/2018/19, amount granted 11 999 900 PLN.
The article was presented during the 16th European Workshop on Aircraft Design Education (EWADE 2022), 8–10 June 2022 Rzeszow.
Citation
Korkosz, M., Noga, S. and Rogalski, T. (2023), "Analysis of the mechanical limitations of the selected high-speed electric motor", Aircraft Engineering and Aerospace Technology, Vol. 95 No. 9, pp. 1423-1434. https://doi.org/10.1108/AEAT-10-2022-0279
Publisher
:Emerald Publishing Limited
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