DYNAMIC D-Q AXIS MODELING OF THREE PHASE INDUCTION MOTOR IN DIFFERENT REFERENCE FRAMES

摘要

This paper presents the dynamic d-q axis modeling of three phase squirrel cage induction motor in different reference frames i.e. stationary, rotor, and synchronous rotating reference frames and observed the dynamic response of the induction motor using MATLAB/SIMULINK software environment. The d-q reference frame theory for induction motor helps to design process of motor-drive systems eliminating design mistakes and in the prototype construction and testing. We observed that the machine outputs such as electromagnetic torque, speed, actual stator phase currents and magnitude of stator flux linkages are all the same regardless of reference frames. We also observed that line start produces higher currents, flux linkages and severe torque pulsations also.