ABSTRACT
As depicted in Figure 1(a), the motor rotational speed denoted by n fluctuates dramatically and rises sharply in the first 0.2s after start-up. The reason is a rotating magnetic field is created after three-phase AC being inputted in synchronous motor’s stator, which causes the rotor cuts magnetic field and then produces an inductive electromotive force that makes the rotor keep rotating until it becomes synchronous with the stator. Once the motor could not be pulled into the synchronization, the motor won’t do work, with n dramatically changing and itself shocking [5]. Therefore, by emulating and analyzing the start-up stage of motors, unreasonable motor design can be effectively avoided as well as irregular motor’s operation.
