New model Variable Frequency transformer model analysis by MATLAB

Abstract

Variable frequency transformer (VFT) is used as a controllable bidirectional transmission device that can transfer power between asynchronous networks and functionally issimilar to back-to-back HVDC. This paper describes the basicconcept of a New Model Variable Frequency Transformer(NMVFT). NMVFT is a new technology which is used for v/f control of induction motors. A digital simulation model of NMVFT and its control system are developed using MATLAB.The out power thus generated in v/f mode has been practicallyverified for the speed control of a three-phase induction motor.Thus constant speed-torque characteristics were achieved.