Torsional behaviors of motor rotor of permanent magnet semi-direct drive system for aerial passenger device

Considering the influence of motor shaft torsional damping, the torsional dynamics equations of a permanent magnet semi-direct drive rotor system in an aerial passenger device are derived. The derivation relies on the coupling between the mathematical model and the gear dynamics model of the permane...

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Bibliographic Details
Published inAIP advances Vol. 14; no. 8; pp. 085209 - 085209-10
Main Authors Cai, Tianfang, Yang, Zhongguo, Li, Wei, Yin, Shuai
Format Journal Article
LanguageEnglish
Published Melville American Institute of Physics 01.08.2024
AIP Publishing LLC
Subjects
Coupling
Cutting equipment
Hopf bifurcation
Linear control
Mathematical models
Maxwell's equations
Motor rotors
Nonlinear control
Passengers
Permanent magnets
Stability criteria
Systems stability
Torsional vibration
Vibration analysis
Vibration damping
Washout filters
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Summary:Considering the influence of motor shaft torsional damping, the torsional dynamics equations of a permanent magnet semi-direct drive rotor system in an aerial passenger device are derived. The derivation relies on the coupling between the mathematical model and the gear dynamics model of the permanent magnet motor, and the Lagrange–Maxwell equations are used for streamlined analysis. To protect the motor under extreme working conditions, the influence of supercritical Hopf bifurcation caused by different torsional dampings of the motor shaft on the torsional vibration of the motor rotor is investigated. Based on the Hurwitz criterion, the influence of the linear control gain and nonlinear gain of the washout filter on the system bifurcation point and the limit cycle amplitude of the system is analyzed. Then, from the perspective of the system instability and oscillation caused by friction damping change of the drive motor and the complex electromechanical coupling behavior in the permanent magnet semi-direct drive cutting drive system of the aerial passenger device, the system stability domain is defined. The results can be applied to effectively suppress the torsional vibration of the shaft system in the permanent magnet semi-direct drive system of the aerial passenger device, providing a theoretical guidance for stable operation of the system.
ISSN:2158-3226
2158-3226
DOI:10.1063/5.0210014