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볼엔드밀의 고속가공에서 절삭력분석 및 평가에 관한 연구
이춘만(Choon Man Lee),류승표(Seung Pyo Ryu),고태조(Tae Jo Ko),정종윤(Jong Yun Jung),정원지(Won Jee Chung) Korean Society for Precision Engineering 2005 한국정밀공학회지 Vol.22 No.5
High-speed machining is one of the most effective technologies to improve productivity. Because of the high speed and high feed rate, high-speed machining can give great advantages for the machining of dies and molds. This paper describes on the analysis and evaluation of cutting force in high-speed machining. Cutter rotation directions, slope directions, spindle revolution and depth of cut are control factors for cutting force. The effect of the control factors on cutting force is investigated for the high speed machining of STD11.
민병권(Min, Byoung-Gwon),류승표(Ryu, Seung-Pyo),전세봉(Jeon, Se-Bong),이봉우(Lee, Bong-Woo),김남해(Kim, Nam-Hae) 한국신재생에너지학회 2005 한국신재생에너지학회 학술대회논문집 Vol.2005 No.06
Recently, because of the depletion of fossil fuels and the environmental pollution by using fossil fuels and harmfulness of atomic power plants. the interests concerning new and renewable energy resources are rising increasingly. And of all new and renewable energy sources the PV generation systems are recognized as the most useful and desirable renewable energy source in allowance for installation conditions. In this development, the 3kWp photovoltaic power generation system is realized to verify the performance of the 3kWp PCS developed by Hyundai Heavy Industries Co. (HHI). The photovoltaic array used in this system is composed of 60 modules of 50Wp capacity. The developed system is tested as procedures and items of test regulation recognized by governmen and the experimental results show the excellent electrical characteristics. Now, the 3kWp PCS developed is installed in the PV model house built in HHI plant and is being tested for practical use commercialization.
우명호(Woo, Myung-Ho),전세봉(Jeon, Se-Bong),이종찬(Lee, Jong-Chan),류승표(Ryu, Seung-Pyo) 한국신재생에너지학회 2006 한국신재생에너지학회 학술대회논문집 Vol.2006 No.06
The demand for developing the compact and cost effective commercial version of the photovoltaic power conditioning system(PCS) is now increasing and several commercial products are on the markets. In this paper, several design results of 10kW rated grid-tied photovoltaic PCS system are introduced, and several test results for the system evaluation are also described. The test results verified the validity of the proposed photovoltaic PCS system.
단상 계통연계형 태양광 발전시스템 인버터의 전류제어에 관한 연구
김태완(Kim Tae-Wan),전세봉(Jeon Se-Bong),류승표(Ryu Seung-Pyo),서광덕(Seo Kwang-Duk) 전력전자학회 2004 전력전자학술대회 논문집 Vol.- No.-
대체에너지 시스템에서 필수적인 계통연계형 인버터는 LC필터를 거친 정현전압 출력에 계통과 연계용 인덕터를 연결하여 사용하여 왔으나, 최근 들어 인버터와 계통을 LC필터 없이 인덕터로만 계통과 연결하여 직접 전류를 제어하는 형태가 적용되고 있다. 또한 출력에 절연 변압기를 사용하던 기존방식과 달리 변압기가 없는 비절연형 인버터는 전류제어를 통해 계통과 직접연결하고, 부피감소와 원가절감을 이룰 수 있다. 본 논문에서는 저주파 절연변압기가 없는 3㎾급의 태양광 발전시스템 시제품을 소개하고 단상계통과 연계한 전류제어 알고리즘의 실험결과를 통해 순시전류제어의 타당성을 확인한다.