1. Discrete-time sliding mode controller based on backstepping disturbance compensation for robust current control of PMSM drives.
- Author
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Gabbi, Thieli S., de Araujo, Marcelo B., Rocha, Lucas R., Scalcon, Filipe P., Gründling, Hilton A., and Vieira, Rodrigo P.
- Subjects
ROBUST control ,PERMANENT magnet motors ,MOTOR drives (Electric motors) ,ADAPTIVE control systems ,INDUCTION machinery - Abstract
A robust current control approach with disturbance cross-coupling compensation for permanent magnet synchronous motor drives (PMSM) is proposed in this paper. The proposed approach can enhance the reference tracking and provides a robust option for current control of PMSM drives. A discrete-time sliding mode current controller is proposed. The PMSM model includes the digital implementation delay, present due to the discrete-time algorithm execution. A discrete-time backstepping disturbance observer is developed, being combined to the sliding mode controller as a means to improve the robustness and tracking capability. The effects of coupling, parametric uncertainties and load disturbances are compensated by the backstepping disturbance observer. The stability analysis of the combined system is presented and the limits for overall system stability are discussed. Simulations and experimental results validate the combined scheme and demonstrate the good performance of the proposal. • The proposal includes the digital implementation delay in the problem formulation. • The proposed system is analyzed in the discrete-time domain. • Mitigation of the coupling effect in dq axes via the disturbance observer. • The proposed switching functions cross the sliding surface at each sampling period. • A simple structure suitable to nonlinear plants with mismatched uncertainties [ABSTRACT FROM AUTHOR]
- Published
- 2022
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