A Graphical User Interface for Clarke-Park Transforms based on LabVIEW

Abstract

Before any electrical system is used in industrial applications, its behavior under different operating conditions must be studied. A mathematical model must be constructed beforehand in order to observe the behavior of the system under different conditions. Modeling of three-phase asynchronous motors with an electromechanical converter is very difficult due to the time varying current and voltage. While performing dynamic analysis of such motors, a common reference system must be determined. The most commonly used methods to facilitate the analysis of three-phase induction motors are Clarke-Park transforms. In this study, a visual interface has been prepared to ease the teaching of Clarke-Park transforms. The users are moved from the 3-phase ( , , ) axis to the reference 2 phase ( , ) axis through the interface and to the ( , ) axis with the angle at the magnitudes defined in the ( , ) axis system. With the interface prepared, users can change the voltage, frequency and angle values and graphically observe their effect on Clarke and Park transforms. In addition, the conversion from 2-phase axis to 3-phase axis is made with inverse Clarke and Park transforms. Mathematical modeling of the transform and the interface were made using LabVIEW.