Novel Deadbeat Predictive Current Control for SPMSM Drives with inductance and rotor flux linkage variation

Abstract

This paper focuses on deadbeat predictive current control (DPCC) for a surface permanent-magnet synchronous motor (SPMSM). One of the main drawbacks that are limiting the widespread application of this control is the disturbance caused by model parameter mismatch. In order to address this problem, a novel DPCC with parameter mismatch compensation for SPMSM is proposed in this paper. The contribution of this work can be divided into three parts. First, the real inductance can be acquired from the d-axis voltage equation online based on the previous instant voltage and current information. Second, with the acquisition of the d-axis inductance, a novel voltage equation with one step delay compensation is proposed to reject the disturbance caused by rotor flux linkage and inductance at the same time. Third, the initial resistance parameter effect on the proposed DPCC is analyzed theoretically. To verify the effectiveness of the proposed DPCC, the conventional DPCC and proposed DPCC are compared. The results demonstrate that the proposed DPCC can effectively reject the parameter mismatch disturbances in both simulation and experiment.