Real-time simulation of an induction motor in different reference frames on a FPGA platform

Induction motors(IM) are the most popularly used motors in the industry. They come in two well known constructional variations namely, Cage Rotor Induction Motor(CRIM) and Wound Rotor Induction Motor(WRIM). In principle, both the machines are identical, as far as basic running, emf and torque production mechanisms are concerned. But the former has its rotor-bars permanently shorted through end-rings, whereas in case of wound rotor machine, the terminals of the rotor-windings are externally available. WRIMs have been used in variable/adjustable-speed drives for many years. In this paper modeling of a WRIM in different reference frames in real-time simulation has been presented. The model is real-time simulated on a FPGA platform built around an Altera-make Cyclone EPIC12Q240C processor which can be programmed using a software known as Quartus-II.