Apparatus for controlling high speed operation of motor and method thereof

An apparatus and method for controlling high speed operation of a motor for controlling high speed operation of a motor by estimating the position and the speed of the rotor of a synchronous motor without a PI regulator to eliminate the users' inconvenience and to secure the reliability of the control of a rotor's position and speed of a synchronous motor, which includes: a reference frame transformer that receives triangular coordinate voltages and currents and converts them to static coordinate voltages and currents, a flux observer that receives the converted static coordinate voltages and currents and observes and outputs the flux of the stator, a position estimator that receives the converted static coordinate currents and the observed flux of the stator and estimates and outputs the position of the rotor, and a speed estimator that receives the estimated position of the rotor and estimates and outputs the speed of the rotor.