Transient analysis of voltage controlled three-phase induction motor using on-off controlled back-to-back connected thyristors

Back-to-back connected thyristors employing ON-OFF control can be used for speed control of three-phase induction motor. Due to the nature of control the operation includes transients in all operating conditions. The basic mathematical model of the machine has been modified for different modes of operations and starting and steady-state transients has been studied on a digital computer. A good correlation has been obtained between theoretical and practical results.