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New variable gain super-twisting sliding mode observer for sensorless vector control of nonsinusoidal back-EMF PMSM |
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| Affiliation: | 1. Badji Mokhtar Annaba University, P.O.BOX 12 Sidi Ammar, Annaba 23000, Algeria;2. LAII, 40 Avenue du recteur Pineau, 86000 Poitiers, France;1. Unidad Académica Juriquilla, Instituto de Ingeniería, Universidad Nacional Autónoma de México, Blvd. Juriquilla 3001, 76230 Querétaro, Qro., Mexico;2. Eléctrica y Computación, Instituto de Ingeniería, Universidad Nacional Autónoma de México, Av. Universidad 3000, 04510 Coyoacán, D.F., Mexico;3. Service d’Automatique, Université de Mons, Blvd. Dolez 31, B-7000 Mons, Belgium |
| Abstract: | This paper presents a new discrete-time super-twisting sliding mode observer with variable gains for sensorless nonsinusoidal vector control of permanent magnet synchronous motors. This observer is adopted to estimate the back electromotive forces (back-EMF) that are required for the rotor speed estimation and for the nonsinusoidal vector control. In addition, their gains are time-varying to minimize the chattering. So, they are adjusted based on internal states of the super-twisting algorithm. The stability analysis is investigated from the Lyapunov theory for discrete-time systems. Finally, simulation and experimental results are presented to demonstrate the good performance and the effectiveness of the proposed observer. |
| Keywords: | Discrete-time sliding mode Nonsinusoidal back-EMF Permanent magnet synchronous motor Sliding mode observer Sensorless vector control Super-twisting algorithm |
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