Model-based voltage phase control for IPMSM with equilibrium point search

This paper presents a model-based design method of voltage phase controller for IPMSM with equilibrium point search. The voltage phase controller controls the torque with the output voltage phase only in high-speed region where the inverter output voltage amplitude is saturated. However, voltage phase control cannot achieve quick torque response because it is designed in defiance of transient characteristic. Due to the nonlinear characteristic between torque and voltage phase, precise model-based design have not yet been carried out. In this paper, a model-based design is proposed by the linearizing the relationship between torque and voltage phase. The analysis of the proposed model describes that the plant is a non-minimum phase system. Simulation results and experimental results show the effectiveness of the model-based design method.