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http://dx.doi.org/10.6109/JKIICE.2009.13.12.2618

Harmonics Control of Electric Propulsion System using Direct Torque Control  

Kim, Jong-Su (한국해양대학교)
Oh, Sae-Gin (한국해양대학교)
Publication Information
Journal of the Korea Institute of Information and Communication Engineering / v.13, no.12, 2009 , pp. 2618-2624 More about this Journal
Abstract
Harmonics (or distortion in wave form) has always existed in electrical power systems. It is harmless as long as its level is not substantial. However, with the recent rapid advancement of power electronics technology, so-called nonlinear loads, such as variable frequency drives for motor power/speed control, are increasingly finding their way to shipboard or offshore applications. In this paper a new approach to direct torque control (DTC) of induction motor drive is presented. In comparison with the conventional DTC methods the inverter switching frequency is constant and is dramatically increased, requiring neither any increase of the sampling frequency, nor any high frequency dither signal. The well-developed space vector modulation technique is applied to inverter control in the proposed DTC-based induction motor drive system, thereby dramatically reducing the current harmonics. As compared to the existing DTC approach with constant inverter switching frequency, the presented new approach does not invoke any concept of deadbeat control, thereby dramatically reducing the computations.
Keywords
Harmonic; Power electronics; DTC(Direct Torque Control); Nonlinear loads; Shipboard;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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