Design and Control of Active Magnetic Bearing System With Lorentz Force Type Axial Actuator

Kim, Ha-Yong; Lee, Chong-Won

doi:10.1115/detc2003/vib-48542

Cited by 8 publications

(8 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…PID controller in [3][4][5] is very common, which can cause stability of the system. In addition to PID, LQR controller has been also presented for smaller sizes of magnetic bearings in [6]. Displacement of location of rotor needs control, which would be conducted through measurement of bearing current.…”

Section: Introductionmentioning

confidence: 99%

Designing Two Control Methods For Active Magnetic Bearing System

Asadbeigi¹

2019

Preprint

View full text Add to dashboard Cite

At the present study, two methods would be presented to control active magnetic bearing. Results of the two methods would be compared and would be simulated using MATLAB Simulating software. Finally, one of the two methods would be proposed as the most efficient method. The methods include 1- adaptive back-stepping control (ABS), which can be applied for controlling linear model of active magnetic bearing (AMB) and 2- pole placement control, which is applicable for controlling system linear model. In both methods, error level around working point can be measured in presence ofimproper external disturbances. Through control using the two methods, it could be indicated that magnetic bearing around work point is asymptotically stable. Simulations indicate efficiency of the control methods properly in presence of external disturbances.

show abstract

Section: Introductionmentioning

confidence: 99%

Designing Two Control Methods For Active Magnetic Bearing System

Asadbeigi¹

2019

Preprint

View full text Add to dashboard Cite

show abstract

“…An AMB is a contactless bearing, in which the rotating shaft is kept floated by active magnetic forces (Jiqiang et al, 2014;Kim et al, 2006). AMBs are composed of two main parts: a ferromagnetic rotor and a stator with several independent electromagnets (four, in most cases).…”

Section: Introductionmentioning

confidence: 99%

Uncertainty and disturbance estimator-assisted control of a two-axis active magnetic bearing

Kuperman

2016

Transactions of the Institute of Measurement and Control

View full text Add to dashboard Cite

In this paper, a robust nonlinear control strategy is developed for a class of second-order nonlinear uncertain systems with uncertainties and disturbances and is applied to two-axis active magnetic bearing position stabilization. The approach is based on a feedback linearization method, robustified by the uncertainty and disturbance estimator, which calculates and robustly cancels system uncertainties and disturbances via appropriate filtering. The controller uses the information regarding the known part of plant dynamics while the terms containing unknown dynamics are treated as additional system uncertainties and disturbances. The algorithm provides excellent performance in stabilizing the active magnetic bearing position and rejecting disturbances both at standstill and under movement. Simulations are given to show the effectiveness of the strategy via an application to an experimentally derived active magnetic bearing model.

show abstract

“…In order to reduce the power loss of the MSFW, permanent magnet-biased magnetic bearings (PMB-MB) are required to support the rotor. [10][11][12][13][14][15][16] As for the arrangement and structure of the PMB-MBs in 5-DOF MSFWs, there are mainly two types. One type includes a pair of 2-DOF radial magnetic bearings (RMBs) and a pair of 1-DOF axial magnetic bearings (AMBs), the other type includes one 2-DOF RMB and a pair of 3-DOF AMBs.…”

Section: Introductionmentioning

confidence: 99%

Modeling and analysis of a novel conical magnetic bearing for vernier-gimballing magnetically suspended flywheel

Fang

Wang

Tang

2013

Proceedings of the Institution of Mechanical Engineers, Part C:

View full text Add to dashboard Cite

The vernier-gimballing magnetically suspended flywheel can generate control moment in radial directions by tilting the spinning rotor to rotate around the radial axes. In order to reduce the extra tilting torque caused by the uniform distribution of flux density and the magnetic coupling among different channels, a novel 3 degrees of freedom conical permanent-magnet-biased magnetic bearing is proposed in the paper. The axial and radial stators are both designed with the normal directions of the midst faces directing to the centroid of the rotor, so as to decrease the extra torque by shortening the length of torque arm. A novel structure of radial X and Y stator poles separated by nonmagnetic material is proposed, and the upper and lower conical stators are designed to be mirror structures with each other, so that the magnetic coupling can be reduced. The mathematical model of the proposed permanent-magnet-biased magnetic bearing is constructed by methods of equivalent magnetic circuit and finite element. Calculations and simulations are carried out on the suspension force, extra tilting torque, and force coupling. The results show that with the conical structure, the extra tilting torque can be decreased from 10.83 Nm to 0.11 Nm when the rotor tilts around X axis for 1°. The magnetic forces among X, Y, and Z directions are almost decoupled even when the rotor shifts in some direction. All the results prove that the novel permanent-magnet-biased magnetic bearing is suitable for application in vernier-gimballing magnetically suspended flywheel.

show abstract

Design and Control of Active Magnetic Bearing System With Lorentz Force Type Axial Actuator

Cited by 8 publications

References 10 publications

Designing Two Control Methods For Active Magnetic Bearing System

Designing Two Control Methods For Active Magnetic Bearing System

Uncertainty and disturbance estimator-assisted control of a two-axis active magnetic bearing

Modeling and analysis of a novel conical magnetic bearing for vernier-gimballing magnetically suspended flywheel

Contact Info

Product

Resources

About