โ Scribed by Ahmed A. Mahfouz; Gamal M. Sarhan; Abdel-Nasser A. Nafeh
No coin nor oath required. For personal study only.
The switching frequency of a conventional direct torque control (DTC) strategy which is based on hysteresis controllers results in a variable switching frequency which depends on the mechanical speed, stator flux, stator voltage, and the hysteresis band of the comparator. In this paper, a DTC scheme using space vector modulator (SVM) and fuzzy logic controller (FLC) is suggested. A comparison with the classical DTC is presented. The suggested control strategy guarantees very good dynamic and steady state characteristics with low sampling rate and a constant switching frequency. The experimental results are presented to validate the scheme. Copyright ยฉ 2005 John Wiley & Sons Ltd.
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