Novel generation of energy saving industrial AC electric drive based on TSDFC with PWM

Abstract

The paper is dedicated to the development of the novel energy saving speed adjustable ac drive with two-stage direct frequency converter (TSDFC) which provides sinusoidal input/output currents and recuperation. Paper describes the two-step control strategy based on the analysis of the TSDFC properties and the problem decomposition. This strategy was realised in the 7.5kW laboratory setup and first in the world 110kW experimental-industrial induction motor drive. The results of experimental study are presented. ©2007 IEEE.