Speed sensorless field oriented control of a CSI-fed induction motor by a transputer based digital controller

This paper presents a method of speed estimation for a CSI-fed induction motor under FOC (field oriented control) which is based on the principle that, as the machine is current fed, the rotor speed is proportional to the terminal voltage and the rotor flux linkage. Results of simulations performed using CASED (Computer Analysis and Simulation of Electrical Drives) where the speed estimate is used in the speed feedback loop are presented. Results of the practical implementation on a transputer based controller are also presented showing the practicality of applying speed sensorless field oriented control to a CSI-fed induction motor (IM)