Vi Based Parameter Identification of Induction Motor

This paper considers the problem of parameter identification and speed estimation of a three-phase squirrelcage induction motor using Virtual Instrumentation. LabVIEW is the graphical development environment for creating flexible and scalable test, measurement, and control applications rapidly and at minimal cost. With LabVIEW, interface with real-world signals, analyze data for meaningful information, and share results and applications. The LabVIEW graphical development environment, combined with DAQmx, gives the tools needed to easily construct applications using counters to generate PWM signals. This lab provides a practical application of an induction motor. The transient speed responses of the motor, for different values of stick deflection (operator’s control) are measured and the corresponding dynamical equations are solved using Runge-Kutta numerical method that is implemented using the tools available in LabVIEW. The stator current and rotor current in both d q axis (isd, isq, irq and ird), the stick deflection and the corresponding speed are found.