Abstract
This paper investigates the nonlinear characteristic between voltage phase and torque and proposes a model-based design of voltage phase controller. PMSM drive systems should realize a quick torque response and have a wide operating range. However, in high-speed region, the control input is voltage phase only and the plant is nonlinear due to the inverter output voltage amplitude saturation. Because of this nonlinear characteristic between current and voltage phase, model-based design have not yet been carried out. As basic study, this paper proposes a model-based voltage phase controller for SPMSM. Simulation results and experimental results show the effectiveness of the model-based design method. In addition, the analysis of the derived plant model shows the relationship between q-axis current and voltage phase is a non-minimum phase system.
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