Active magnetic bearing control loop modeling for a finite element rotordynamics code
Abstract
A mathematical model of an active electromagnetic bearing which includes the actuator, the sensor and the control system is developed and implemented in a specialized finite element code for rotordynamic analysis. The element formulation and its incorporation in the model of the machine are described in detail. A solution procedure, based on a modal approach in which the number of retained modes is controlled by the user, is then shown together with other procedures for computing the steady-state response to both static and unbalance forces. An example of application shows the numerical results obtained on a model of an electric motor suspended on a five active-axis magnetic suspension. The comparison of some of these results with the experimental characteristics of the actual system shows the ability of the present model to predict its performance.
- Publication:
-
2nd International Symposium on Magnetic Suspension Technology, Part 2
- Pub Date:
- May 1994
- Bibcode:
- 1994mst..symp..319G
- Keywords:
-
- Active Control;
- Finite Element Method;
- Magnetic Bearings;
- Magnetic Control;
- Rotor Dynamics;
- Actuators;
- Controllers;
- Electric Motors;
- Magnetic Suspension;
- Mathematical Models;
- Mechanical Engineering