Method and System for Calculating Torque of Induction Motors Using Current Spectrum and Method and System For Fault Diagnosis of Induction Motors Using the same

摘要

The present invention provides a method and system fault diagnosis of induction motor torque is calculated using the same methods and systems of induction motors relates to, in Equation 1, Equation 2, Equation (4) and the current flowing in the stator using an equivalent model of an induction motor, which is defined by the equation 5 (I _as , I _bs , I _cs ) and voltage (V _as , V _bs , V _cs ) current flowing in the rotor (I _ar , I _br , I _cr ) and voltage (V _ar , V _br , V _cr ) active power (P in induction motors using the _e ) The first step of calculating; A second step of obtaining the actual rotational speed (n) of the induction motor; The active power of the induction motor is calculated in the first step (P _e ) and torque of the induction motor by using the actual rotation speed of the induction motor is calculated (n) in the second phase (T) a third step of calculating; A fourth step of determining a failure of the induction motor to whether to permit a predetermined range of torque that the torque (T) of the induction motor is calculated in the third step; But characterized in that it comprises a, the a being defined by the following equation 3. Measured at the same time as increasing the reliability of the measurement by measuring the torque by using the stator and rotor of the current spectrum of an induction motor according to the failure diagnosis method and system of the torque calculation method and system using the same of the induction motor and the induction motor configured as described above there is an effect that it is possible to overcome the limitations as well as on the effects that can be accurately diagnosed whether or not the failure of the induction motor. ;