High-Order Terminal Sliding-Mode Observer for Chattering Suppression and Finite-Time Convergence in Sensorless SPMSM Drives

Due to the advantages of strong robustness and fast convergence, the sliding-mode observer (SMO) is considered as an effective approach for sensorless surface-mounted permanent magnet synchronous motor (SPMSM) drives. However, the inherent chattering and none finite-time convergence are still challenging problems in SMO application. To address these problems, this article proposed a high-order ter...