INDUCTION MOTOR AND CONTROLLING APPARATUS FOR INDUCTION MOTOR

摘要

Disclosed is a control device for controlling the operation of an induction motor. The control device for controlling the operation of the induction motor according to one embodiment of the present invention includes a dq coordinate converting unit which converts a current and a voltage applied to the induction motor into dq coordinates, a synchronous dq coordinate entire state/speed measuring unit which calculates estimated rotor magnetic flux and an estimated angular velocity by using the current and the voltage converted into the dq coordinates, a slip angular velocity calculating unit which calculates the slip angular velocity by using the estimated rotor magnetic flux which is calculated, and a phase angle calculating unit which calculates a phase angle by integrating the error of the estimated angular velocity and the slip angular speed which is calculated. The present invention provides the induction motor and the control device for controlling the operation of the induction motor using an indirect vector control method without a velocity sensor.