センサレス誘導電動機の広範囲駆動のための直接周波数形ベクトル制御法

抄録

This paper proposes a new observer that estimates the rotor flux of induction motors for sensorless vector control. The proposed observer has the following attractive features. Observer gains can be designed easily and clearly based on the analyses of the observer's characteristic equation. The observer can estimate the rotor flux stably in both motoring and regenerating operations for all speed ranges. Extensive experimental investigations verify that the proposed observer can operate properly in both torque and speed control modes for all speed ranges including zero-crossing frequency.