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이준환(LEE Joon-Hwan),이광운(LEE Kwang-Woon),이상택(LEE Sang-Taek),이원경(LEE Won-Kyoung) 전력전자학회 2005 전력전자학술대회 논문집 Vol.- No.-
교류전동기의 벡터제어 구동 시스템에서 상전류 측정 오차는 토크 및 속도 제어 성능에 직접적인 영향을 주는 요소로서, 맥동 없는 토크 및 속도 제어를 위해서는 상전류의 정확한 측정이 필요하다. 상전류 측정 오차는 오프셋(Offset) 변동에 의한 오차와 스케일(Scale) 차이에 의한 오차로 분류할 수 있으며, 각각의 오차 성분은 고정자 전기 주파수의 1배 및 2배에 해당하는 토크 맥동을 야기 한다. 본 논문에서는 교류전동기 벡터제어 구동 시스템에서 상전류 측정 오차에 의한 토크 맥동을 저감시킬 수 있는 새로운 알고리즘을 제시하며, 시뮬레이션 및 실험을 통해 제안된 방식의 타당성을 입증한다.
하이브리드 전기자동차를 위한 매입형 영구자석 동기전동기의 저속영역 센서리스 제어
이용균(Y.K LEE),박상준(S.J Park),이주석(JS Lee),이광운(K.W LEE),목형수(H.S Mok),이현동(H.D Lee),권태석(T.S Kwon) 전력전자학회 2011 전력전자학술대회 논문집 Vol.2011 No.7
기존에 하이브리드 자동차에 전동기는 레졸버등의 위치센서를 사용하여 제어를 하는데 안전성의 문제로 위치센서가 고장이 발생하게되면 센서없이 모터를 제어하는 방법이 연구되고 있다. 중고속 영역에는 모터의 전압모델을 사용하는 센서리스 방법이 주로 사용되는데 저속과 정지 상태에서는 모터 역기전력의 크기가 작아서 사용하기 어렵다. 본 논문에서는 기존의 방법보다 비교적 간단한 저속역역 센서리스 방법을 소개하고 이 방법의 문제의 해결방안을 제시하고 시험을 통하여 이를 검증하였다.
로버트 블라이의 『몸 둘레의 빛』: 반전(反戰)시의 양상
이광운(Kwang-woon Lee) 한국영미어문학회 2004 영미어문학 Vol.- No.70
This paper reveals major aspects of Robert Bly's anti-war poetry in his second book, The Light around the Body. Bly shows his sense of wrath against the Vietnam War and criticizes the current political climate as well as the psychic background of the war-time American society. Sly introduces the concept of the 'father-consciousness'(or the outer world) and the 'mother-consciousness'( or the inward world) to show that the characteristics of the former are ""logical thought, rational thought, movement in straight lines, discipline, Calvinism, dislike of tenderness"" etc. and those of the latter are ""passion, tenderness, love of nature, love of animals"" etc. He suggests that if a society is ""captured by the outward world""(the father-consciousness), it is bound to encounter a conflict, possibly a war. Thus, recovering the inward world is essential to be healed from the wounds of the outward world. This paper divides the five sections of The Light Around the Body into three parts. The first two sections of the book depicts the political or the outer causes of the Vietnam War. In these poems, Bly warns and criticizes the American expansionism, racism, commercialism, Puritanism etc. The third section of the book describes the Vietnam War as an eruption of imbalanced forces in the unconscious. And the last two sections of the book deliver a healing message. In these poems, Sly shows that each individual can be healed from the wounds of the war only by recovering the inward world through which he can be saved. Therefore, Sly's anti-war poetry, which does not urge any political solutions of the conflict, is better understood as meditative, ritualistic, and moral rather than political.
이광운 ( Lee Kwang-woon ) 대한영어영문학회 2002 영어영문학연구 Vol.28 No.3
This paper attempts to analyze James Dickey's early poems in terms of his vision of unity. Dickey depicts his inner vision of unity through ordinary and common scenes. He deals with things from a truly animistic point of view and tries to recover the original wholeness that was lost by modern man. Dickey's unified vision is sexual, surrealistic, transcendental as well as shamanistic. This leads to the recovery of wholeness. Thus, Dickey's poetry possesses healing power. Dickey shows his monistic vision in such poems as “Inside the River”, “Tree and Cattle”, and “Common Grave” etc. in which nature and man, earth and heaven, time and eternity, and life and death are merged. He also reveals his sense of unity in “Heaven of Animals”, “Springer Mountain”, “Listening to Foxhounds”, “A Dog Sleeping on My Feet” and “Approaching Prayer” in which predators and prey are unified in a love relationship in the cycle of life and death. Dickey also suggests a continuity of life after death. He depicts shamanistic phenomena in some of his poems that show the poetic speakers possessed with the spirits of the dead. < Catholic U of Daegu >
이광운 ( Lee Kwang-woon ) 대한영어영문학회 2005 영어영문학연구 Vol.31 No.3
The history of the prose poem in America is comparatively short. Thus, as yet prose poem does not have any specific rules to keep and “no aesthetic or compositional tradition has formed around the prose poem.” Robert Bly, who is one of the leading writers of prose poetry, however, succinctly expresses his view on the prose poem. The purpose of this paper is to reveal some characteristics of the prose poems of Robert Bly. The paper suggests that Bly's prose poems are mostly thing poems dealing with the essences of the thing itself through direct, natural, and simple dialogical language. This paper also argues that Bly's prose poems are haiku-like dealing with the problem of spiritual awakening. It is also suggested that the deep image and the leaping image are used to express “the lyrical impulses of the soul, the ebbs and flows of reverie, the pangs of conscience” throughout his poetry.
영구자석 동기전동기의 역기전력 기반 센서리스 알고리즘 분석
이광운(Kwang-Woon Lee),이용재(Yongjae Lee),하정익(Jung-Ik Ha) 전력전자학회 2011 전력전자학술대회 논문집 Vol.2011 No.7
본 논문에서는 영구자석 동기전동기의 역기전력 기반 센서리스 알고리즘들에 대해 세부적인 구성을 살펴보고, 각각에 대해 전달함수를 구하여 주파수 응답을 분석함으로써 각 알고리즘들의 특성을 비교하고자 한다.