Abstract
This paper presents a model-based design method of voltage phase controller for IPMSM. 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, a model-based design has not yet been carried out. In this paper, a model-based design is proposed by linearizing the relationship between torque and voltage phase. The analysis of the proposed model describes that the plant is a nonminimum phase system. Simulation results and experimental results show the effectiveness of the model-based design method which uses the proposed model. Furthermore, the stable analysis shows that the conventional design method has low bandwidth due to an unstable zero of the plant.
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