Dynamic modeling and analysis of spatial position of electromagnetic bearing-rotor system on moving carrier

WU Miao-ni, JIANG Ke-jian
(School of Information Science and Technology, Zhejiang Sci-Tech University, Hangzhou 310018, China)

Abstract: Aiming at the influence performance of the rotor system's position parameters on the moving carrier on its dynamic characteristics, the dynamic characteristics of the electromagnetic bearing-rotor system on the carrier were studied. Taking a flexible rotor system with single-rigid-dish, multi-lumped-mass, and single-bearing as the research object, the mounting position and the axial directions of the rotor system were modeled on a carrier. The influence of different installation position and axial direction of the rotor system on its dynamic characteristics was tested with the electromagnetic bearing-rotor system semi-physical simulation platform. The results indicate that under the motion condition of the vehicle, the center of the motion trajectory of the rotor system can be offset by different installation positions, which may lead to the local collision of the rotor and the stator. The different axial direction can cause the rotor system to change the size of the trajectory, resulting in the rotor system running unstably. Therefore, when the carrier is in motion, the influence of the rotor system position on its dynamic characteristics should be considered.

Key words: electromagnetic bearing-rotor system; dynamic characteristics; moving carrier; rotor modeling; installation location