Why do we use different transformations in simulink modelling of induction motor?

I was struggling with my MATLAB Assignment help and then a good friend told me about MatlabSolutions.com website and they gave me the best Assignment help ever. I hope to always count on the quality and efficiency of your services.

It depends in which frame of reference one wishes to observe the internal motor variables.

For example in the synchronous frame of reference all variables are dc and one may apply conventional control and controller design theory.

In the rotor reference frame all variables are at slip frequency and controller design is more complex.

In the stationary reference frame all variables are at the applied frequency.

Today with modern computing speeds it makes very little difference which reference frame one uses but for controller design and implementation the synchronous reference frame is most widely used.

In the early 1900–1930 when anlaysing such systems graphics terminals and memory were not available and all variables had to be printed on high speed moving paper plotter / recorder (strip chart). Here the strip chart printing head could only move up and down (1 dimension) and the paper moved being fed from a large roll of paper (like we see in earthquake recorders). Hence trying to observe variables at 50/60Hz was not possible so the synchronous and rotor reference frame were favoured.

Also when doing load flow to calculate initial conditions the synchronous reference frame is easier as all variables are DC in steady state. Today all internal calculations are still done in the synchronous reference frame but shown in what one actually observes.