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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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7.7 Summary

This chapter discussed the structure of a five-phase drive system and its control properties and elaborated the advantages and limitations of a five-phase induction motor drive system and identified its potential application areas. Modeling of a five-phase voltage source inverter was illustrated for step mode of operation and PWM mode of operation. FFT analysis was given for the step mode of operation of five-phase VSI. Experimental results were also given for step-mode of operation of the five-phase voltage source inverter. This was followed by the phase variable model of a five-phase induction machine. The model was then transformed into two orthogonal planes, namely d-q and x-y and the torque equation was obtained. The vector control principle was then presented for the five-phase induction motor drive system. The difference between the vector control principle applied to a three-phase system and a five-phase system was highlighted. The theoretical background was supported by the simulation model using Matlab/Simulink software. The modern control technique such as Model predictive control is discussed with reference to the application for current control of a five-phase voltage source inverter.

Problems

D 7.1: Calculate the rms voltage of the output phase voltage and adjacent line and non-adjacent line voltage for ten-step mode of operation of a five-phase voltage source inverter operating at 100 Hz fundamental frequency in terms of dc link voltage Vdc.

D 7.2: A ...

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