Suspension force control of bearingless permanent magnet slice motor based on flux linkage identification |
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| Affiliation: | 1. Department of Electronics, Information and Bioengineering, Politecnico di Milano, Milano, Italy;2. Politecnico di Milano Research Unit, National Interuniversity Consortium of Materials Science and Technology, Milano, Italy;3. Department of Biomedical Engineering, University of Arizona, Tucson, Arizona, USA;4. Anesthesia and Intensive Care, Sant''Ambrogio Cardiothoracic Center, Milano, Italy;5. Department of Biomedical Engineering, Stony Brook University, Stony Brook, New York, USA;6. Advanced Heart Failure and Mechanical Circulatory Support Program, San Raffaele Scientific Institute, Milano, Italy;7. Università Vita Salute San Raffaele, Milano, Italy;8. Biocompatibility and Cell Culture Laboratory “BioCell,” Department of Chemistry, Materials and Chemical Engineering \"Giulio Natta,\" Politecnico di Milano, Milano, Italy |
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| Abstract: | The control accuracy and dynamic performance of suspension force are confined in the traditional bearingless permanent magnet slice motor (BPMSM) control strategies because the suspension force control is indirectly achieved by adopting a closed loop of displacement only. Besides, the phase information in suspension force control relies on accurate measurement of rotor position, making the control system more complex. In this paper, a new suspension force control strategy with displacement and radial suspension force double closed loops is proposed, the flux linkage of motor windings is identified based on voltage–current model and the flexibility of motor control can be improved greatly. Simulation and experimental results show that the proposed suspension force control strategy is effective to realize the stable operation of the BPMSM. |
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| Keywords: | Bearingless permanent magnet slice motor (BPMSM) Suspension force Flux linkage identification Double closed loops Control system |
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