• Title, Summary, Keyword: Design Characteristic

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Power Loss and Thermal Characteristic Analysis of Induction Motors for Machine Tool Spindle according to the Rated Power-Speed (공작기계 스핀들용 유도전동기의 용량-속도에 따른 손실 및 발열특성 해석)

  • Seong, Ki-Hyun;Cho, Han-Wook;Hwang, Joo-Ho;Shim, Jong-Yeob
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.62 no.12
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    • pp.1668-1677
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    • 2013
  • This paper deals with the power loss and thermal characteristics of induction motor for machine tools according to the rated power and speed. To reduce the fabrication error by thermal strain in rotational machine tools, we calculated the power loss and thermal behavior of induction motors. Firstly, the inverse design of general induction motors for machine tool spindle has been performed. The inverse design results are compared with the torque-speed characteristic curve in motor's catalog. The power loss are calculated by finite element method(FEM) at rated condition. Secondary, the transient thermal characteristics of induction motors are calculated by equivalent thermal resistance model from Motor-CAD S/W. The inverse design, power loss and thermal behavior calculation for induction motors with various rated power and speed has been performed. Finally, to verify the design and calculation process of induction motor, we implemented the experimental set with 0.4kW 1710rpm class industrial induction motor model. The obtained thermal characteristics of experimental model confirmed that the design and power loss calculation processes are appropriate to the prediction of thermal strain in rotational machine tools.

A Study on Formative Characteristic of Subculture Style in 20C Fashion -Focused on Hair Style - (20세기 패션에 나타난 하위문화 스타일의 조형성에 관한 연구 - 헤어스타일을 중심으로-)

  • Kim, Jeong-Mee;Seol, Yu-Jin
    • Fashion & Textile Research Journal
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    • v.8 no.2
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    • pp.225-232
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    • 2006
  • This study purposed to review the concept and characteristics of subculture theoretically and then to analyze subcultural hairstyles shown in the 20th century's fashion in terms of form, structure, texture, design line and design principle, which were formative factors of beauty art. The range of this study was from the 1950's to the 1990's, during which subcultural hairstyles, which were selected for this study, kept a unique formality as subcultural characteristics of each time were reflected in hairstyles. The hairstyles found in subcultural styles were reviewed as follows. From the formative analysis as the above, it was concluded that layer form was seen most frequently in the subcultural hairstyles. This may be because it has a lot of layers in hair, and enables to make more various forms with a simpler care than other hairstyles so that it is easy to show one's own characteristic or differentiate oneself from others. Thanks to the characteristics of layer form, horizontal and convex were often seen as design lines. As for a texture, straight often appeared. The texture of straight is naturally formed without any care applied on hair. The reason may be that most subcultures refused artificiality. Therefore, the characteristics of subcultural hairstyles may be that hairstyles are transformed into various forms and created into the styles appropriately for individual tastes so as to clearly express one's own idea and thought.

Design and Implementation of Optical Receiving Bipolar ICs for Optical Links

  • Nam Sang Yep;Ohm Woo Young;Lee Won Seok;Yi Sang Yeou1
    • Proceedings of the IEEK Conference
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    • pp.717-722
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    • 2004
  • A design was done, and all characteristic of photodetectr of the web pattern type which a standard process of the Bipolar which Si PIN structure was used in this paper, and was used for the current amplifier design was used, and high-speed, was used as receiving optcal area of high altitude, and the module which had a low dark current characteristic was implemented with one chip with a base. Important area decreases an area of Ie at the time of this in order to consider an electrical characteristic and economy than the existing receiving IC, and performance of a product and confidence are got done in incense. First of all, the receiving IC which a spec, pattern of a wafer to he satisfied with the following electrical optical characteristic that produced receiving IC of 5V and structure are determined, and did one-chip is made. On the other hand, the time when AR layer of double is $Si_{3}N_{4}/SiO_{2}=1500/1800$ has an optical reflectivity of less than $10{\%}$ on an incidence optical wavelength of 660 ,and, in case of photo detector which reverse voltage made with 1.8V runs in 1.65V, an error about a change of thickness is very the thickness that can be improved surely. And, as for the optical current characteristic, about 5 times increases had the optical current with 274nA in 55nA when Pc was -27dBm. A BJT process is used, and receiving IC running electricity suitable for low voltage and an optical characteristic in minimum 1.8V with a base with two phases is made with one chip. IC of low voltage operates in 1.8V and 3.0V at the same time, and optical link receiving IC is going to be implemented

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The Design of a Inductive Superconducting Fault Current Limiter (유도형 초전도 사고전류제한기의 설계)

  • Bae, Joon-Han;Lee, Sang-Jin;Oh, Yun-Sang;Ko, Tae-Kuk
    • Proceedings of the KIEE Conference
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    • pp.119-121
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    • 1995
  • This paper is a study on inductive superconducting fault current limiter design.. We have created simulation for an imaginery power system with inductive superconducting fault current limiter. Then input variables for characteristic analysis and actual manufacturing, and output variables for design results was assigned. Using the results from these variables, the design criterion was determined which was fed into concept design arising from characteristic analysis to determine the inductance of limiting coil and normal state resistance value of triggering coil. These result was put back into design details to finally give out the design result for inductive superconducting fault current limiter.

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The Performance Evaluation and the Optimal Design of 2MW DFIG (2MW급 DFIG 최적 설계 및 성능 평가에 관한 연구)

  • Cho, Sung-Ho;Oh, Young-Jin;Moon, Byeong-Sun;Lee, Seung-Kuh
    • 한국신재생에너지학회:학술대회논문집
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    • pp.382-385
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    • 2007
  • The optimal design and characteristic analysis of Double Fed Induction Generator(DFIG) was performed. The purpose of the paper is to verify the accuracy of design and the reliability of DFIG by experiment. A grid connection experiment is performed to confirm generating performance in wide operating range. In this experiment, 2.7MW M/G set is used. The finite element method is applied to calculate parameters and characteristic analysis of DFIG. And in order to reduce design time and efforts, Design of Experiment(DOE) is used. The experimental results are compared with the optimum design results.

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Characteristic analysis and Classification of Thinking Methods In the Architectural Design Process (건축디자인과정에서 나타난 사고방식의 유형과 특성 분석)

  • Kim Yong-ll;Chung Sa-Hee
    • Korean Institute of Interior Design Journal
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    • v.14 no.5
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    • pp.71-79
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    • 2005
  • Thinking methods have been widely recognized as phenomenon of problem solving in architectural design process and as one of the bases of creativity. In recent years the study of thinking methods have become a major focus of design research. And the purpose of the paper will understand the phenomenon of characteristic and classification of thinking methods in the architectural design process. Extensive protocols are recorded. In particular, the protocols contain sufficient information to make a detailed picture of the architect's problem-solving processes. A protocol study is reported in which the experimental data by architect's is analyzed through the visual protocol analysis method. These findings will help understand the architectural design nature. And they supply a direction for creative education for architects and the base for CAAD system development through understanding for architect's thinking methods.

A Study on Blouse Design for Silver Generation Using Modularization (모듈화를 적용한 실버 블라우스 디자인 연구)

  • Kim, Da Eun;Lee, Kyoung Hee
    • Fashion & Textile Research Journal
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    • v.17 no.3
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    • pp.341-350
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    • 2015
  • The purpose of this study was to suggest a silver blouse design by applying modularization. The precedent study of the researcher was used to analyze the design characteristics that were displayed in domestic and foreign silver blouses. This study was taken as the follow-up research as the module components and range of the silver blouse were set up and it was based on to suggest a silver blouse design with application of modularization. The intention was to base on the module system used in various fields to apply the modularization method on the module design research of silver blouse and as a result, it was derived into 6 types. The traditional design reflected on the characteristic of how the silver generation prioritizes practicality and in order to emphasize this, it will be more effective to apply the fastener and folding method for the development of the design. The contemporary design reflected on the characteristic of how the silver generation prioritizes aesthetics and in order to emphasize this, it will be more effective to apply the module composition method where integration can be made according to the desire of the wearer for the development of the design. The trendy design reflected on how the characteristic of the silver generation wants to look younger and the derived modularization method can be applied freely for expression. Since the range, structure, and formation where modularization can be applied are general, it is implied that there is a need to take sustainable development has to be conducted as the tool that can create different types of design.

A study on the Kineticism which was introduced to Boundary form in Interior Design (실내디자인에 있어서 경계의 형태에 도입된 키네티시즘에 관한 연구)

  • Choi, Joo-Yeun;Lee, Jin-Min
    • Archives of design research
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    • v.18 no.3
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    • pp.171-180
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    • 2005
  • The purpose of this research is to investigate the nature of direction of the design corresponding to a human-centered design, digitalism, ecological design, and culture-oriented design which is an issue of design in the 21st century, from the design of the inside of a room. As a method of approach to this objective, first, 1 understand the form of boundary structure appearing in space, through the theoretical investigation of a boundary form. This research is trying to elicit the expression characteristic of kineticism which was introduced to the boundary form as a factor constituting space, by investigating the characteristic of kinaticism which was expressed in plastic arts and other genres. As a process of the proceeding of this investigation, It is explained the background, purpose, and method of this study in Chapter I, and look into the characteristic of the unfolding and expression of kinetic arts as well as the structure of a boundary form of space in Chapter II. In Chapter III, I divide the aspect of modern architectural space into realistic movement, relative movement, and associational movement and examine them. In Chapter IV, I investigate a case of modern space in which the three types of the characteristic of movement mentioned in Chapter Three was expressed, and analyze to what boundary structure the space was introduced. Last of all, in Chapter V, I elicit the characteristic of a boundary form of kineticism which was the result that appeared through the above analysis, and present the nature of future direction of interior.

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The Parameter Design of Multiple Characteristics with Engineer's Opinions (전문가 의견을 고려한 다특성치 파라미터 설계에 관한 연구)

  • Cho, Yong-Wook;Park, Myeong-Kyu
    • Journal of the Korean Society for Quality Management
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    • v.27 no.2
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    • pp.218-236
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    • 1999
  • The purpose of parameter design is to determine optimal settings of design parameters of a product or a process such that the performance characteristics of a product exhibit small variabilities around their target values. Taguchi made significant contributions in this area. However, his analysis of the problem focused on only one performance characteristic or response, although in product and process design, multiple characteristics are more common. The critical problem in dealing with multiple characteristics is how to compromise the conflict among the selected levels of the design parameters for each individual characteristic. In this paper, Methodology using SN ratio optimized by univariate technique is proposed and a parameter design procedure to achieve the optimal balance among several different response variables is developed. Existing case studies are solved by the proposed method and the results are compared with ones by the sum of SN ratios, the expected weighted loss, the desirability function, and EXTOPSIS model.

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