Model-Free Predictive Current Control of Sensorless PMSM Based On Extended State Observer

This article deals with a control strategy to resist disturbance for sensorless Permanent Magnet Synchronous Motor (PMSM) drives based on extended state observer (ESO), for the performance of model predictive control (MPC). PMSM is prone to be affected by motor parameters such as resistance and inductance. Hence, this article proposes a model-free predictive current control (MFPCC) based on ESO in PMSM drives. Firstly, to reduce the influence of motor parameters variation of PMSM, a ultralocal model is adopted to replace the traditional PI current control. Secondly, an ESO is utilized to estimate the back electromotive force (back - EMF), which makes the estimation accuracy of the back - EMF enhanced. Meanwhile the speed performance of the PMSM is improved. Finally, through simulation analysis, the effectiveness of the proposed algorithm for PMSM is validated.