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Abstract

In this paper, the active magnetic bearing (AMB) system for high-speed permanent magnet (PM) machine has been studied. It includes the coupled action between radial magnetic bearings due to the journal inclination and the coupled action of the unbalanced magnetic pull (UMP) upon the lateral vibration in a rotor system in addition to the gyroscopic action. It also takes into account the electrical differential equation of system. Firstly, a dynamic model of the 4-DOF rotor-AMBs system is established by adopting the PID control arithmetic and simulated by using software MATLAB/SIMULINK. Secondly, with the method of Fourier Series, the UMP in the high-speed PM machine, caused by relative eccentricity, is calculated theoretically and proved by using software ANSOFT. Finally, a comprehensive AMB control system for PM machine has been established and verified by simulations. It has provided theoretic guidance for the design AMB system for rotating machinery.

Keywords

Rotor-AMBs system PM machine UMP

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References

Schuhmann

Hofmann

and Werner

, Improving operational performance of active magnetic bearings using Kalman filter and state feedback control, IEEE Transactions on Industrial Electronics 59 (2011), 821–829.

Tian

Sun

and Lie

Y.U.

, Dynamical and experimental researches of active magnetic bearing rotor systems for high-speed PM machines, Proceedings of the CSEE 32 (2012), 116–123.

Han

Zheng

and Liu

, Unbalanced magnetic pull effect on stiffness models of active magnetic bearing due to rotor eccentricity in brushless DC motor using finite element method, Mathematical Problems in Engineering, 2013, (2013-7-14) 2013.1 (2013), 147–170.

Guo

Yong-Yong

H.E.

and Chu

F.L.

, The calculation of unbalanced magnetic pull and its effect on vibration of an eccentric rotor, Engineering Mechanics 3(1) (2003), 22–40.

Wang

, Analysis on stiffness and damping performance of active magnetic bearing system, Advances in Manufacturing 2 (1998), 51–55.

Schweitzer

, Active magnetic bearings, Hochschulverlag AG an der ETH Zurich (1994), 1.

Belmans

Vandenput

and Geysen

, Influence of unbalanced magnetic pull on the radial stability of flexible-shaft induction machines, Electric Power Applications Iee Proceedings B 134 (1987), 101–109.

Theoretical and experimental researches of active magnetic bearing systems for high-speed PM machines

Abstract

Keywords

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References