Adaptive Observer-Based Control for Monoinverter Dual Parallel SPMSM

This article proposes an adaptive observer-based control scheme for the monoinverter dual parallel (MIDP) surface-mounted permanent magnet synchronous motors (SPMSMs) system, equipped with two phase-current sensors and a rotor position sensor. An auxiliary vector input is introduced to ensure that the observation error system is strictly positive real, which is necessary for the design of adaptive observers. The observer gain is adjusted online using the adaptive term, ensuring that the observer poles remain unaffected by motor speed variations. Furthermore, the stability of the adaptive observer is proved via the Lyapunov theorem. Finally, the feasibility of the proposed adaptive observer-based control scheme is validated by experiments.