الفهرس | Only 14 pages are availabe for public view |
Abstract The acceleration transient torque of the balanced three-phase induction motor operating from a balanced single frequency voltage supply have been investigated by a combination of numerical techniques and analytical methods. A critical review is given for the various reference frame formulations of the induction motor dynamics for and the efficiency of the methods or solving the dynamic equations has been assessed. The modal approach is presented as a comprehensive framework around which the numerical results are systematically organized and such subjects as acceleration transients and nonsimultaneous switching are unified. The problem of predicting torque transient in three-phase induction motor under condition of non-simultaneous switching of the supply is formulated. Detailed attention is given to the identification of the physical modes and to understanding their behavioural changes as a function of rotor speed. The m.m.f. space-vector viewpoint is presented to give a description Of the airgap magnetic field interactions in the production of transient torque and the possibility of |