摘要：This paper addresses the lack of robustness in three phase Induction Motors (I.M) speed control
in presence of uncertainty and external unknown disturbance of Model Reference Adaptive
Control (MRAC), and present an enhancement of robustness by employing the adaptive law
modifications for robustness. Considered modifications were Dead zone modification, Sigma
modification, e-modification and projection operator algorithm modification. Speed control of
three phase induction motor in this paper was depend on decoupling benefits of rotor flux Indirect
Field Orientation (IFO). Simulation results shows improved robustness characteristics and
performance. In order to make the case study under consideration more realistic, the work
considered the limitation imposed on supplied voltage in real application, where this was the other
challenge which has been avoided by many researchers.
关键词：MRAC; Dead zone modification; Sigma modification; e-modification; Projection operator;
modification; three phase I.M; IFO
