Model-Free Predictive Current Control of PMSM Based on Sliding Mode Disturbance Observer

Model parameter mismatch always exist in model predictive current control (MPCC) system, which will degrade control performance. A model-free predictive current control method based on sliding mode disturbance observer (MFPCC-SMDO) is designed in this paper, which can avoid direct using of model parameter. To estimate the unknown part in ultra-local model, a SMDO with a novel reaching law which can effectively reduce system chattering is also designed. Different from other papers, the impact of ultra-local model parameter $\alpha$ on the stability of predictive control system is analyzed in this paper. Thus, instead of additional observer design, an simple and effective inductance identification algorithm that only requires measuring values is proposed to the real-time correction of predictive control system.