A Simple Steady-State Error Compensation Method of Deadbeat Predictive Control for Permanent Magnet Synchronous Machine

摘要

Deadbeat predictive control features fast dynamic responses, compared to the proportional integral (PI) and proportional resonant (PR) control, etc. However, it's quite sensitive to plant uncertainties, such as the system inductance, hence the steady state error between the command and the feedback is inevitable in a practical system. Based on the relationship between parameter mismatch and current tracking error, a new compensation algorithm for the deadbeat predictive control as used for the permanent magnet synchronous motor (PMSM) is proposed. The new method is derived for surface mounted permanent magnet synchronous motor (SMPMSM) first, and then extended to interior permanent magnet synchronous motor (IPMSM). The proposed method does not need a paralleled integral controller or parameter estimator to achieve the zero steady state error, and is simple and easy to implement in the microprocessor. IPMSM drive system simulation and experiment results verify the performance of the proposed new method.