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Position estimators of surface permanent‐magnet synchronous motors are often designed with local stability and thus may be unstable under a large estimation error. To overcome the risk of instability, a globally stable position estimator is proposed in this paper. The proposed estimator is derived from an alternative expression of the stator model, which has the rotor position as the only parameter...
This paper proposes a new reduced-order model for a surface permanent-magnet synchronous motor (SPMSM). A position estimator with global stability is then designed based on the proposed model. Design criteria for stability, dynamic and tracking performances are clearly given. The importance of global stability is emphasized by comparison with the design with only local stability. Theoretical results...
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