Model Predictive Current Control of Permanent Magnet Synchronous Linear Motor Based on Sliding Mode Observer

In order to achieve more accurate control of permanent magnet synchronous linear motor (PMSLM) drive system, a sensorless control strategy of three-vector model predictive current control (TV-MPCC) + sliding mode observer (SMO) is proposed. First, the TV-MPCC is used instead of the traditional vector control method to improve the controllable range, reduce the number of predictions, and improve the control efficiency. Second, a sliding mode observer is utilized to estimate the system electromotive force and a phase-locked loop strategy is used instead of an inverse tangent function to infer the desired information in order to avoid the error phase delay and phase compensation process. Simulation results show that the proposed method satisfies the system operating requirements.