• 한국복식학회:학술대회논문집
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• 한국복식학회 2002년도 International Costume Conference
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• pp.82-82
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• 2002

• 한국철도학회:학술대회논문집
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• 한국철도학회 2008년도 춘계학술대회 논문집
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• pp.1955-1961
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• 2008

A lot of researches on a linear induction motor(LIM) have been advanced to realize a traction system with high efficiency and performance for railway transit for a long time. However, most of them are limited in design of a LIM part such as Primary and Secondary. At a LIM which is traveling, the change of an air-gap(It occurs by a construction tolerance of a secondary reaction plate) becomes the cause which decreases a smoother ride and the efficiency of railway transit system. Therefore, uniform air-gap operation of LIM is important issue to improve the system efficiency. However, the researches which control the air-gap length of the LIM with technical and high-cost problem have been not advanced a lot. Therefore, in this research, it is introduced an air-gap control system for performance test machine of a scale-downed LIM which is able to control the air-gap length of the LIM and monitor a variety of performance changes of the propulsion system, and conducted a research on feasibility of the system based on characteristic analysis.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2007년도 춘계학술대회B
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• pp.2621-2625
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• 2007

This study aims at analyzing the flow characteristics of the electromagnetic pump using a linear induction motor (LIM) for transferring molten metals. The flow characteristics of the pump are simulated by magnetohydrodynamic(MHD) program. In this system, the LIM is used for transferring molten metal by electromagnetic force. The molten metal is treated as the secondary part of the LIM. Since the LIM produces an electromagnetic force in the duct, the molten metal can flow from the furnace to the reservoir. The flow characteristics of the pump are analyzed using MHD program for magnetic field of 0.1[T] in duct. In order to prove the analysis, we made a prototype electromagnetic pump using LIM.

• 전기학회논문지
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• 제67권1호
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• pp.46-51
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• 2018

Constant slip frequency control has been conventionally used in thrust control of the linear induction motor(LIM) for magnetically levitated train. However in this paper variable slip frequency control method is presented to increase LIM efficiency according to change of driving notch. Thrust, attractive force, input power to inverter, regenerative power of the LIM are analyzed by finite element method when the train runs according to the presented control method. As a result it is proved experimentally that the electrical energy to inverter is reduced than the conventional method.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1995년도 추계학술대회 논문집 학회본부
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• pp.52-54
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• 1995

When LIM is drived by the general purpose inverter, there is no food-back of speed and thrust, etc. Therefore, through analysis of LIM by the simulation, the prediction of operating characteristics and patterns of LIM is necessary. But, the open-loop control system is used widely, because it can consist of simple and cheap. In this paper, we foaled with the dynamic characteristics of LIM drived by V/f constant during acceleration, cruising speed deceleration. And, we compared the simulation value with actual measurement value.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1996년도 추계학술대회 논문집 학회본부
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• pp.19-21
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• 1996

In this paper, the experiment on the dynamic characteristics of LIM for the propulsion system UTM(Urban Transit Maglev) is threated. Untill now LIM has been mainly experimented by using the rotational arch type system, but this system compose of the test vehicle mounted LIM, which driven by PWM inverter. And the anlysis of the performance and the steady-state characteristics of the LIM is treated under various operation patterns. This paper may be available to compose the operating system of LIM driven by the open or closed loop control.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1995년도 하계학술대회 논문집 A
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• pp.337-339
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• 1995

A Linear Induction Machine(LIM) is the motor which is developed from an rotary induction machine. Usually, the electromagnetic field of an LIM is analyzed by Maxwell's equations. The structure of an LIM is different from a conventional rotary machine, an LIM has some particular characteristics such as the end effects. Hence, the mathematical analysis of an LIM is very complicated and the implementation of the equivalent model is difficult. In this paper, the dynamic equations and the equivalent model of a Double-sided short primary LIM(DLIM) is obtained by the winding function and a d-q theory. The validity of the proposed methodology is verified by numerical analysis.

• 복식
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• 제61권6호
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• pp.131-145
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• 2011

The purpose of this study is to provide preliminary data on strategies to create a domestic prestige brand based on Korean traditional designs. This study also deals with how to promote this brand around the world. The two points mentioned above will be accomplished by examining the characteristics of the brand '3.1 Phillip Lim' which succeeded in both design and marketing during a short period of time. The method of the study will be followed. Firstly, the basic design and philosophical background of Phillip Lim was investigated, after reviewing the global luxury market and current status of overseas expansion of Korean designers through paper study and antecedent workups. Secondly, for the practical stage, design characteristics and marketing strategies were reviewed with the collections of '3.1 Phillip Lim'. Three factors found in '3.1 Phillip Lim's design success are as follows: First, practical and simple designs using fabrics of high quality. Second, handcraft elements and interesting details that differentiates his design identity. Third, femininity expressed in the feminine silhouette and color. The marketing elements that made '3.1 Phillip Lim' as a successful brand are: First, differentiated positioning as a luxurious contemporary brand. Second, brand promotion through various collaborations. Third, the gradual expansion of women's, men's, kids' apparel to accessory, lingerie and the stable flagship stores. Thus, '3.1 Phillip Lim' has combined modern and classic styles using high quality fabrics and practical designs with unique details. Through it's differentiated marketing strategy targeting New York's market, which prefers popular 'luxury contemporary brand's rather than high-end luxury brands, this brand's creativity and commercial aspects contributed to make '3.1 Phillip Lim' into a luxury brand that represents New York fashion. Korean designers who seek to enter the global fashion industry should consider applying Korean traditional designs on global designs to make favorable products and localize these products according to regional characteristics.

• 한국철도학회논문집
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• 제12권5호
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• pp.800-805
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• 2009

이 연구에서는 선로구축물을 최소화 할 수 있어 도시형 자기부상철도로 적합한 LIM 방식 자기부상철도의 궤도시스템을 개발 제안하였다. 도심지에 건설될 경우 많은 사치적 비용을 초래하므로 공사기간을 단축할 수 있도록 프리캐스트 바닥판을 사용하는 상부구조 형식을 채택하였으며 바닥판 시공시 침목이 함께 설치 될 수 있는 트윈블록 침목 궤도시스템을 개발하였다. 제안한 트윈블록 침목 궤도시스템에 대해 유한요소해석과 실험을 통해 구조적 안전성을 검증하였으며 모의시공시험 및 기계연구원 시험선 시공을 통해 그 시공성을 확인하였다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2006년도 춘계학술대회 논문집 전기기기 및 에너지변환시스템부문
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• pp.161-163
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• 2006

This paper presents the experiment and the characteristics analysis of an electromagnetic pump using linear induction motor(LIM). The characteristics of LIM pump are analyzed solving the hydrodynamic equation at constant magnetic flux. The molten zinc is used in the experiment and the experimental results are compared with the analysis.