Field-Oriented Control of Stepper Motor with Model Predictive Current Control

Abstract

Hybrid stepper motors (HSMs) have a wide range of applications. However, conventional open-loop control is difficult to meet the demand for higher accuracy. The development of control theory and electronic technology makes the application of advanced control techniques possible, including model predictive control (MPC). In this paper, a stepper motor current loop predictive model has been constructed, and then the design of q-axis current regulator has been implemented by feedback correction and rolling optimization, which has been applied to the field-oriented control (FOC) of stepper motor and verified by simulation and experiments. The results indicate that the MPC regulator in this paper has good regulation effect and reduces the q-axis current ripples to a certain extent in the series control, which finally improves the control performance.