Fuzzy logic based six-phase induction drive control

Donatas Uznys

Doctoral dissertation

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The dissertation investigates the issues of six-phase induction motor in normal operating and post-fault conditions using fuzzy logic controllers. The main aim of research is to develop six-phase induction drive control methods using fuzzy logic controllers that can improve qualities of stator currents and magnetic flux production.

The work approaches the following tasks: creation of multi-phase induction machine mathematical and computer models; experimental studies of six-phase machine transients in normal operating and post-fault conditions; simulation studies of six-phase electric drives with six-phase voltage source inverter; experimental studies of six-phase induction frequency drive in compensated post-fault conditions.

The dissertation consists of three parts including introduction, three chapters, general conclusions, references and three annexes.

The introduction reveals the investigated problem, importance of the thesis and the object of research and describes the purpose and tasks of the thesis, research methodology, scientific novelty, the practical significance of results examined in the thesis and defended statements. The introduction ends in presenting the author’s publications and conference presentations on the subject of the defended dissertation and defining the structure of the dissertation.

Chapter 1 revises used literature. Advantages and disadvantages of multiphase induction motors, their application, faults, compensation methods for fault aftereffects are discussed. Control methods of multi-phase induction drives and mathematical models of six-phase induction drives are presented. At the end of the chapter, conclusions are drawn and the tasks for the dissertation are reconsidered.

Chapter 2 presents simulation results of six-phase induction motor and frequency drive operation. Fuzzy logic controller for vector control method is developed.

Chapters 3 presents experimental rig for testing in post-fault conditions, investigates one phase loss post-fault condition after-effects compensation using scalar control method. For this purpose, a search algorithm for stator voltage phase angles and controller for their application is developed.

4 articles focusing on the subject of the discussed dissertation are published: one article – in the Clarivate Analytics Web of Science database, one – in Clarivate Analytics Web of Science database Proceedings material, two articles – in journals quoted by other data bases. 9 presentations on the subject have been given in conferences.

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DOI: https://doi.org/10.20334/2018-030-M

Book details

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Imprint No:
145×205 mm
132 p.
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