磁束オブザ-バに基づく制御電流源駆動誘導電動機ベクトル制御系の解析

概要

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In order to improve the robustness against the parameter change, a flux observer based vector control system has been proposed in the literature. However, the relation between the conventional vector control and the observer based one is not evident, because the former is composed of the induction motor model in rotating reference frame and the stationary one is used in the latter. In this paper, a vector control system using the stationary reference frame model and an observer based vector control system using the rotating one are proposed and the relation between. them are made clearly. Furthermore, the flux observer based vector control system is analyzed taking account of a PI speed controller. The trajectories of the poles and zeros of the speed transfer function are computed by a linear model and the transient characteristics are discussed.