H.Umida: “The System Configuration of Speed Sensorless Vector Control”, TranaIEE of Japan, Vol.117-D, No.5 pp. 541-543(1997)(in Japanese) 海田秀俊:「速度センサレスベクトル制御システムの実際構成」, 電学論D, Vol.117, No.5 pp. 541-543(1997)
T.Fukumoto, S.Togashi, H.Hamane, and Y. Hayashi. “Improvement of Induction Motor Speed Sensor-less Vector Control System Using an Adaptive Observer in Low Speed Range”, ICEMS2006, DS1E113,(2006-11)