Sensorless control of permanent magnet synchronous motor based on fixed‐time terminal sliding mode observer
Xiaojun Wei,
Keqi Mei,
Shihong Ding
et al.
Abstract:In the sensorless control of a sliding mode observer (SMO)‐based permanent magnet synchronous motor (PMSM), a large gain is required to ensure the stability of the sliding motion. Nonetheless, this can lead to the unexpected chattering and degrade the precision of position estimation. To overcome this trouble, we have proposed a fixed‐time nonsingular terminal SMO (NTSMO). The convergence time is independent of the initial value. Firstly, a fixed‐time nonsingular terminal sliding mode surface is designed so th… Show more
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