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http://dx.doi.org/10.5207/JIEIE.2009.23.2.138

The Modified Direct Torque Control System for Five-Phase Induction Motor Drives  

Kim, Min-Huei (영남이공대학 전기자동화과)
Kim, Nom-Hun (청주대 전자정보공학부)
Baik, Won-Sik (영남이공대학 전기자동화과)
Publication Information
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers / v.23, no.2, 2009 , pp. 138-147 More about this Journal
Abstract
In this paper, improved direct torque control(DTC) system for five-phase squirrel-cage induction motor(IM) is proposed. Due to the additional degrees of freedom, five-phase 1M drives present unique characteristics. Also five-phase motor drives possess many other advantages compared with the traditional three-phase motor drive system, such as reducing an amplitude of torque pulsation and increasing the reliability. The DTC method is advantageous when it is applied to the five-phase IM, because the five-phase inverter provides 32 space vectors in comparison to 8 space voltage vectors into the three-phase inverter. However, five-phase motor has structural drawback of 3rd space-harmonics current component, it is necessary to controlled 3rd harmonic current. So to control 3rd harmonic current and enhance dynamic characteristics of five-phase squirrel-cage IM drive, modified DTC method should be demanded. The characteristics and dynamic performance of traditional five-phase DTC are analyzed and new DTC for five-phase IM is presented. A more precise flux and torque control algorithm for the drives can be suggested and explained For presenting the superior performance of the proposed direct torque control, experimental results are presented using a 32-[bit] fixed point TMS320F2812 digital signal processor with 2.2[kW] induction motor.
Keywords
Five-phase Induction Motor Control; Modified DTC; 3rd Harmonic Current Control;
Citations & Related Records
Times Cited By KSCI : 5  (Citation Analysis)
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