J
Jul-Ki Seok
Researcher at Yeungnam University
Publications - 110
Citations - 2480
Jul-Ki Seok is an academic researcher from Yeungnam University. The author has contributed to research in topics: Direct torque control & Control theory. The author has an hindex of 27, co-authored 109 publications receiving 2250 citations. Previous affiliations of Jul-Ki Seok include Seoul National University & Samsung.
Papers
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Journal ArticleDOI
Deadbeat-Direct Torque and Flux Control of Interior Permanent Magnet Synchronous Machines With Discrete Time Stator Current and Stator Flux Linkage Observer
TL;DR: A Gopinath-style discrete time flux linkage observer is developed which contains two different flux estimation methods based on current and voltage models for flux linkage that produce correctly estimated flux linkages needed for accurate DB-DTFC implementation.
Journal ArticleDOI
Control of series active power filters compensating for source voltage unbalance and current harmonics
TL;DR: A novel control scheme compensating for source voltage unbalance and current harmonics in series-type active power filter systems combined with shunt passive filters is proposed, which focuses on reducing the delay time effect required to generate the reference voltage.
Journal ArticleDOI
Online capacitance estimation of DC-link electrolytic capacitors for three-phase AC/DC/AC PWM converters using recursive least squares method
TL;DR: In this article, a novel online capacitance estimation method for a DC-link capacitance in a three-phase AC/DC/AC PWM converter is presented, where a controlled AC current with a lower frequency than the line frequency is injected into the input side, which then causes AC voltage ripples at the DC output side.
Journal ArticleDOI
Sensorless speed control of nonsalient permanent-magnet synchronous motor using rotor-position-tracking PI controller
TL;DR: The proposed method only requires the flux linkage of the permanent magnet and is insensitive to parameter estimation error and variation, so the designers can easily determine the possible operating range with a desired bandwidth and perform vector control even at low speeds.
Proceedings ArticleDOI
Variable speed wind power generation system based on fuzzy logic control for maximum output power tracking
TL;DR: In this article, a variable speed control scheme of grid-connected wind power generation system using cage-type induction generators, which is based on a fuzzy logic control, is proposed.