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High Performance Control of AC Drives with Matlab / Simulink Models by Jaroslaw Guzinski, Atif Iqbal, Haitham Abu-Rub

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2.1 Preliminary Remarks

This chapter describes the basic modeling procedures of power electronic converters and AC machines. The mathematical model thus obtained will be used to develop simulation models using Matlab/Simulink. The standard approach of mathematical modeling will be described in addition to advanced modeling procedures such as the signal flow graph.

The modeling and simulation of AC machines will be presented. DC motors will be briefly modeled and discussed for educational benefit; those machines are currently rarely used and analyzed, therefore will not be discussed in depth. The AC machines that will be discussed are the most popular three-phase induction machine (squirrel cage and rotor-wound) and three-phase permanent magnet synchronous machine. Machine modeling is a first important step in a better understanding of the topic. The modeling of these machines will introduce the reader to the basics for understanding and analyzing the advanced control techniques of electric drives, such as ‘field oriented control,’ ‘direct torque control,’ ‘feedback linearization control,’ ‘predictive control,’ and ‘sensorless operation.’

The modeling of multiphase machines and IM with inverter output filters will be discussed in later chapters. This also applies to non-linear models of AC machines.

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