tender for purchase of performance investigation of digitally and computerized controlled four-quadrant operation of dc motor using 1- phase dual converters with analysis of circulating and non circulating modes , purchase of performance investigation of digitally and computerized controlled four-quadrant operation of dc motor using 1- phase dual converters with analysis of circulating and non circulating modes , supply of performance investigation of digitally and computerized controlled four-quadrant operation of dc motor using 1- phase dual converters with analysis of circulating and non circulating modes(as per specifications mentioned in the tender document). (the equipment must be quoted alongwith all necessary accessories as per tender specifications).