Abstract
A model of a bearingless motor is presented, in which finite element method is employed. An input-output linearizing control approach has been developed for the nonlinear system of the bearingless motor in which lateral forces can be generated in addition to the toque. A nonlinear controller based on dynamic feedback linearization is designed so that the nonlinear system with strongly coupled motion is reduced to four decoupled normalization linear subsystems including two rotor displacements and its speed as well as rotor flux. Furthermore, linear control system techniques are applied to these linearized subsystems to synthesize desired response. To verify the effectiveness of the control scheme, some simulations have been employed, and the results are satisfactory. A permanent magnet thrust bearing was employed to stabilize the rotor in axial direction.
| Original language | English |
|---|---|
| Pages (from-to) | 22-26+73 |
| Journal | Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering |
| Volume | 21 |
| Issue number | 9 |
| State | Published - Sep 2001 |
Keywords
- Bearingless motor
- Decoupling control
- Dynamic feedback linearization