Transient modes of high-speed rotor whit electric drive
Department of Mechanisms and Machines Theory, Faculty of Industrial Technology, Technical University, Sofia.
Review Article
Global Journal of Engineering and Technology Advances, 2022, 13(03), 008–021.
Article DOI: 10.30574/gjeta.2022.13.3.0151
Publication history:
Received on 20 August 2022; revised on 29 September 2022; accepted on 02 October 2022
Abstract:
The paper presents the results of the study of the transient modes of a high-speed rotor with formally six degree of freedom, driven by an electric motor-generator during transition trough the resonance.
Based on the Newton-Euler equation, the differential equations of motion are derived, and the frequency spectrum of the considered electro-mechanical system is determined.
The following cases are considered: - transition trough resonance with unlimited (ideal energy source) and limited excitation by the motor; unstable frequency zones; phase trajectories and the influence of the electro-magnetic constant of the motor on the stability. The analysis of the stationary and nonstationary processes was carried out using the asymptotic method of Bogoliybov-Mitropolski. The stability of vibrations are determined by numerical solution of the equations in variations of the equilibrium states.
These transitions are of great importance for the recently widespread so-called uninterruptible power sources (UP), as well as the kinetic energy recovery system (KERS ) used as additional propulsion energy .
Keywords:
Rotor systems; Transient modes; Limited and Unlimited Excitation; Stability of Vibration
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