• Title/Summary/Keyword: and R&D mechanism

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Lifetime improvement of 4P Magnetic Contactor (4P 전자접촉기의 수명 향상)

  • Lee, Kyung-Ku;Ryu, Jong-Sang;Kim, Gyeon-Mook;Park, Ji-Hong;Jo, Hyun-Kil;Seo, Jung-Min
    • Proceedings of the KIEE Conference
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    • 2001.10a
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    • pp.42-44
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    • 2001
  • This paper proposes impact vibration theory of magnetic contactor moving mechanism and correlation test the bouncing time with the spring load. Mechanical and electrical lifetime is under the influence of impact vibration of magnetic contactor moving mechanism. In shortage of technique, we have experienced many difficulties in magnetic contactor development. By this research, we analyzed total moving mechanism and applied results to optimum 4p magnetic contactor development.

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Development of Mini Magnetic Switch (초소형 전자 개폐기 개발)

  • Lee, Kyung-Ku;Kim, Jun-Ho;Kim, Gyeoo-Mook;Park, Ji-Hong;Jo, Hyun-Kil;Ahan, Kil-Young;Seo, Jung-Min
    • Proceedings of the KIEE Conference
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    • 2003.10b
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    • pp.134-136
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    • 2003
  • This paper proposes moving mechanism theory & magnetic core analysis regarding mini magnetic contactor and differential mechanism & bimetal analysis regarding mini thermal overload relay. In shortage of technique, we have experienced many difficulties in magnetic switch development. By this research, we developed core parts about mini magnetic switch and applied the results to optimum mini magnetic switch development

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Development of Permanent Magnet Synchronous Motor for High voltage Gas Insulated Switchgear (초고압 Gas Insulated Switchgear 구동용 전동기 개발)

  • Oh, Young-Jin;Jeong, Gyun-Ha;Lee, In-Woo
    • Proceedings of the KIEE Conference
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    • 2007.07a
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    • pp.919-920
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    • 2007
  • Currently national High Voltage Gas Insulated Switchgear (GIS) operating mechanism is made up of spring operating mechanism or hydraulic operating mechanism. On the contrary, advanced technology trend in foreign countries replace current mechanical mechanism with electrical motor-drive mechanism that leads to participate GIS bid and increase sales with the point of simplification of driving system and IT application. Therefor it is essential to develop high voltage GIS using the motor-drive system to develop national heavy electric machine industries and catch up the technology to the advanced level. This paper therefore presents design and analysis of permanent synchronous motor for high voltage GIS, verifies the performance by the experimental test.

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Development of drive mechanism for 245kV 40kA high-voltage Gas Insulated Switchgear(GIS) using SPMSM (SPMSM을 이용한 '245kV 40kA GIS' 조작기 개발)

  • Jeong, Kyun-Ha;Seo, Kyong-Bo;Kim, Jung-Bea;Suh, In-Young
    • Proceedings of the KIEE Conference
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    • 2008.07a
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    • pp.980-981
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    • 2008
  • Mechanical spring and hydraulic pressure operated mechanisms are applied in most of today's High Voltage Gas Insulated Switchgear(GIS)s. This paper proposes a new type of operation mechanism for GIS circuit breakers rated at 245kV and 40kA. The Motor-Direct-Drive-Mechanism (MDDM) has many advantages compared to conventional operating mechanisms. It has a very simple structure with only one moving part, low mechanical stress and audible noise. It also allows monitoring, operation speed control and self-diagnosis functions.

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A study on of drive mechanism for 245kV 40kA high-voltage Gas Insulated Switchgear(GIS) using SPMSM (SPMSM을 이용한 245kV 40kA GIS 조작기 개발에 관한 연구)

  • Jeong, Kyun-Ha;Oh, Young-Jin;Yeo, Chang-Ho;Suh, In-Young
    • Proceedings of the KIPE Conference
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    • 2007.07a
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    • pp.114-116
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    • 2007
  • Mechanical spring and hydraulic pressure operated mechanisms are applied in most of today's High Voltage Gas Insulated Switchgear(GIS)s. This paper proposes a new type of operation mechanism for GIS circuit breakers rated at 245kV and 40kA. The Motor-Direct-Drive-Mechanism (MDDM) has many advantages compared to conventional operating mechanisms. It has a very simple structure with only one moving part, low mechanical stress and audible noise. It also allows monitoring, operation speed control and self-diagnosis functions.

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Efficient container door Open/Closed detection mechanism for Container Security Device(ConTracer) (컨테이너 보안장치(ConTracer)를 위한 효율적인 컨테이너 도어 개폐감지 메커니즘)

  • Moon, Young-Sik;Lee, Eun-Kyu;Shin, Joong-Jo;Shon, Jung-Rock;Choi, Sung-Pill;Kim, Jae-Joong;Choi, Hyung-Rim
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2011.05a
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    • pp.831-834
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    • 2011
  • This paper is intended as performance verification of efficient container door Open/Closed detection mechanism for Container Security Device(ConTracer) to container cargo transportation. Container door Open/Closed detection mechanism using Reed sensor is important to satisfies the US Department of homeland security customs and border protections requirements to many types of container door. Also, Verify that the container door is configured correctly and that you can check the illegal opening. In this article, Performance valuation of this Contacer on reed sensor has been verified through field test for each other 30 containers. Once the improvement has been made, we are suggest that propose skills will meet the highest standards for container security safety.

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A WEB-BASED PROJECT MANAGEMENT SYSTEM FOR GOVERNMENT R&D PROGRAMS (국가 연구개발을 위한 웹기반의 과제관리 시스템)

  • 손권중
    • Proceedings of the Technology Innovation Conference
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    • 2003.06a
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    • pp.108-115
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    • 2003
  • Government R&D Project Management in Korea has had considerable difficulties because of the lack of project monitoring systems and insufficient communication. The National Program for Tera-level Nanodevices (TND Program) is a ten-year R&D program for commercialization in the area of nano technology. Collaboration and communication among the various participants such as business companies, universities, and government R&D institutes are key success factors in this R&D program. TND Program office has developed a Web-based project management system. This system consists of mostly four sub-management functions: (1) Milestones management of all R&D projects; (2) DR (Design Review) management as the mechanism for checking the performance against milestones; (3) Project activity management using the WBS (Work Breakdown Structure); (4) Budget management. Additionally, it also has many R&D supporting functions such as technology information bulletin board, community management, and visual summary of project progress and performance. This system is effective for monitoring research project as well as measuring project performance of the overall research program. This Web-based system has become the useful tool of R&D moving target mechanism and effective communication and collaboration tool. System features and adoption process of the system are also suggested.

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A Study on the Optimal Design of a R-S-S-R Three Dimensional Mechanism (3次元 R-S-S-R 機構의 最適設計 에 관한 硏究)

  • 김호룡;김경률
    • Transactions of the Korean Society of Mechanical Engineers
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    • v.9 no.4
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    • pp.528-538
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    • 1985
  • A R-S-S-R three dimensional mechanism is designed for crank-rocker type through the optimization technique. The nonlinear kinematic equation of the mechanism is formulated by adopting the concept of structural error and precision points. Taking this equation as an objective function, the required mechanism is optimally synthesized by the Fletcher-Davidon-Powell's method of optimization techniques. The structural errors due to the various positions of precision points are compared, and the results from the use of two penalty functions suggested respectively by Fiacco-McCormick and by Powell are also compared on their effectiveness. The mobility of the optimally designed mechanism is checked for the possibility of its motion, and when a mechanism is optimally designed, it is strongly suggested that the mobility must be checked on the designed mechanism.

The Patterns and Directions of Technological Innovation in the Steel Industry (철강산업의 기술혁신패턴과 발전과제)

  • 송성수
    • Journal of Korea Technology Innovation Society
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    • v.3 no.2
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    • pp.94-110
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    • 2000
  • This article prospects the patterns of technological innovation in the steel industry and suggests the directions of technological innovation in Korean steel industry. Technological innovation patterns can be analysed through technological trends, innovation-inducing mechanism, and innovators' relationships. In the technological trends, direct coupling of manufacturing processes, lasting growth of mini-mill, and the importance of technological integration are prospected. In the innovation-inducing mechanism, while production system will be specialized, the development of new steel materials and environment-friendly technological innovation will be accelerated. In the innovators' relationships, steel industry faces more complex competition and new forms of inter-firm cooperation including M&A, joint venture, and joint R&D. In order to cope with such changes in the technological innovation patterns, Korean steel industry need to establish core competence based on technological innovation through a great leap in R&D investment, the production of high value-added products, the development of new generation steel technologies, strategic joint R&D, comprehensive technological cooperation, and government's active support.

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Appropriability Mechanism Strategy for Domestic IT Manufacturing Companies (국내 IT 제조기업의 전유성 확보 전략)

  • Lee, Seung-Jun;Park, Seong-Taek;Kim, Young-Ki
    • Journal of Digital Convergence
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    • v.11 no.11
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    • pp.233-242
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    • 2013
  • Securing the appropriability strategy of R&D funding for technology innovation is very important because R&D needs a lot of time and money. Appropriability means the environmental factors that govern an innovator's ability to capture profits generated by an innovation. Generally appropriability mechanism has five kinds, including patent, secrecy, lead time advantage, complementary sales & service, complementary manufacturing. In this paper, we surveyed domestic software industry professionals about appropriability mechanism strategy, and presented a result of priority of each factor and difference between previous research and this study, using the pair-wise comparison method. The result of study showed that domestic IT manufacturing companies prefer patent better than other appropriability mechanism.