Information Technology Journal1812-56381812-5646Asian Network for Scientific Information10.3923/itj.2009.1150.1159XinDeng JinZhao TaoGeng YangLiu 8200988This study proposes the full order observer feedback gain and adaptive speed PI design methods in speed sensorless induction motor drive. The characteristic of speed estimation plant function, which has impact on adaptive speed estimation PI design, is influenced by the feedback gain design. It is found that poor damping exists when feedback gain is zero and a simple, parameter independent feedback gain design method is introduced. Estimated speed steady state accuracy, noise sensitivity and the relation between speed estimation loop and speed control loop are the affecting factors in adaptive speed estimation PI design. The method of adaptive speed estimation PI design is proposed according to the speed control loop. Steady state and dynamic performance of the sensorless drive using simulation are demonstrated.]]>Schauder, C.,19922810541061Cirrincione, M., M. Pucci, G. Cirrincione and G.A. Capolino,20064289104Holtz, J. and J.T. Quan,20033910521060Kubota, H., K. Matsuse and T. Nakano,199329344348Cirrincione, M., M. Pucci, G. Cirrincione and G.A. Capolino,200754150166Yan, Z., C. Jin and V.I. Utkin,20004712861297Kim, Y.R., S.K. Sul and M.H. Park,19921992pp: 594599Ohtani, T., N. Takada and K. Tanaka,199228157164Hinkkanen, M. and J. Luomi,20012001pp: 13331338Hinkkanen, M. and J. Luomi,19983911271135Suwankawin, S. and S. Sangwongwanich,20065396119Harnefors, L. and M. Hinkkanen,20085513191329Suwankawin, S. and S. Sangwongwanich,200249444455Hofmann, H. and S.R. Sanders,199834169177Hinkkanen, M. and J. Luomi,20045113181328Kubota, H., I. Sato, Y. Tamura, H. Ohta and Y. Hori,20023810811086Maes, J. and J.A. Melkebeek,200036778785Yang, G. and T.H. Chin,199329820825